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#define _GNU_SOURCE
/* NSIGNER_HEADERLESS_DECLS_BEGIN */
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#include <cJSON.h>
#include "otp_pad.h"
/* from secure_mem.h */
/*
* Secure memory buffer — mlock'd, zeroized on free.
* Used for mnemonic phrases, private keys, and any sensitive material.
*/
typedef struct {
void *data; /* pointer to locked allocation */
size_t size; /* usable size in bytes */
int locked; /* 1 if mlock succeeded */
} secure_buf_t;
/* Allocate a secure buffer of `size` bytes. Returns 0 on success, -1 on failure. */
int secure_buf_alloc(secure_buf_t *buf, size_t size);
/* Zeroize and free a secure buffer. Always succeeds (idempotent). */
void secure_buf_free(secure_buf_t *buf);
/* Zeroize `len` bytes at `ptr` in a way the compiler cannot optimize away. */
void secure_memzero(void *ptr, size_t len);
/* from mnemonic.h */
/* Maximum mnemonic length: 24 words * 10 chars avg + spaces + null = 256 is safe */
#define MNEMONIC_MAX_LEN 256
/*
* Mnemonic state — holds the loaded mnemonic in secure memory.
* Only one mnemonic is active at a time per process.
*/
typedef struct {
secure_buf_t buf; /* secure storage for the mnemonic string */
int loaded; /* 1 if a mnemonic is currently loaded */
int word_count; /* 12, 15, 18, 21, or 24 */
} mnemonic_state_t;
/* Initialize mnemonic state (must be called before use). */
void mnemonic_init(mnemonic_state_t *state);
/* Load a mnemonic string into secure memory. Validates word count (12/15/18/21/24).
* Returns 0 on success, -1 on invalid input, -2 on memory error. */
int mnemonic_load(mnemonic_state_t *state, const char *phrase);
/* Zeroize and unload the mnemonic. Idempotent. */
void mnemonic_unload(mnemonic_state_t *state);
/* Check if a mnemonic is currently loaded. */
int mnemonic_is_loaded(const mnemonic_state_t *state);
/* Get the mnemonic string (only valid while loaded). Returns NULL if not loaded. */
const char *mnemonic_get_phrase(const mnemonic_state_t *state);
/* Generate a new BIP-39 mnemonic phrase (12/15/18/21/24 words) into out.
* Returns 0 on success, -1 on invalid arguments or generation failure. */
int mnemonic_generate(int word_count, char *out, size_t out_len);
/* from role_table.h */
/* Maximum limits */
#define ROLE_NAME_MAX 64
#define ROLE_PATH_MAX 128
#define ROLE_PURPOSE_MAX 32
#define ROLE_CURVE_MAX 16
#define ROLE_PUBKEY_HEX_MAX 66 /* 64 hex chars + null + pad */
#define ROLE_TABLE_MAX_ENTRIES 256
/* Purpose enum for fast comparison (string form kept for config/display) */
typedef enum {
PURPOSE_NOSTR = 0,
PURPOSE_BITCOIN,
PURPOSE_SSH,
PURPOSE_AGE,
PURPOSE_FIPS,
PURPOSE_PQ_SIG, /* post-quantum signatures (ML-DSA, SLH-DSA) */
PURPOSE_PQ_KEM, /* post-quantum key encapsulation (ML-KEM) */
PURPOSE_UNKNOWN
} role_purpose_t;
/* Curve enum */
typedef enum {
CURVE_SECP256K1 = 0,
CURVE_ED25519,
CURVE_X25519,
CURVE_ML_DSA_65,
CURVE_SLH_DSA_128S,
CURVE_ML_KEM_768,
CURVE_UNKNOWN
} role_curve_t;
/* Selector type — how this role's key is addressed */
typedef enum {
SELECTOR_NOSTR_INDEX, /* uses nostr_index shorthand */
SELECTOR_ROLE_PATH /* uses explicit full path */
} role_selector_type_t;
/* A single role entry */
typedef struct {
char name[ROLE_NAME_MAX];
char purpose_str[ROLE_PURPOSE_MAX];
char curve_str[ROLE_CURVE_MAX];
role_purpose_t purpose;
role_curve_t curve;
role_selector_type_t selector_type;
int nostr_index; /* valid if selector_type == SELECTOR_NOSTR_INDEX */
char role_path[ROLE_PATH_MAX]; /* valid if selector_type == SELECTOR_ROLE_PATH */
char pubkey_hex[ROLE_PUBKEY_HEX_MAX]; /* filled after derivation, empty until then */
int derived; /* 1 if pubkey_hex has been populated */
int path_range_lo; /* for SELECTOR_ROLE_PATH: inclusive lower bound for %d; -1 = fixed path */
int path_range_hi; /* inclusive upper bound; == path_range_lo for single */
int path_default_index; /* default index when client sends {"role":...} without "index"; -1 = require explicit */
int path_allowed_indices[64]; /* explicit set of allowed indices (for sets); 0 = use range */
int path_allowed_count; /* 0 = use range_lo/range_hi; >0 = use allowed_indices */
int requires_approval; /* 0 = role-as-password (no prompt), 1 = require interactive approval */
} role_entry_t;
/* The role table */
typedef struct {
role_entry_t entries[ROLE_TABLE_MAX_ENTRIES];
int count;
} role_table_t;
/* Initialize an empty role table */
void role_table_init(role_table_t *table);
/* Add a role entry. Returns 0 on success, -1 if table full, -2 if name duplicate. */
int role_table_add(role_table_t *table, const role_entry_t *entry);
/* Find a role by name. Returns pointer to entry or NULL. */
role_entry_t *role_table_find_by_name(role_table_t *table, const char *name);
/* Find a role by nostr_index. Returns pointer or NULL. */
role_entry_t *role_table_find_by_nostr_index(role_table_t *table, int index);
/* Find a role by role_path. Returns pointer or NULL. */
role_entry_t *role_table_find_by_path(role_table_t *table, const char *path);
/* Get the default role (named "main"). Returns pointer or NULL if no "main" role. */
role_entry_t *role_table_get_default(role_table_t *table);
/* Parse purpose string to enum */
role_purpose_t role_purpose_from_str(const char *s);
/* Parse curve string to enum */
role_curve_t role_curve_from_str(const char *s);
/* Purpose enum to string */
const char *role_purpose_to_str(role_purpose_t p);
/* Curve enum to string */
const char *role_curve_to_str(role_curve_t c);
/* Register a nostr-index role if missing. Returns 0 on success, -1 on error. */
int role_table_register_nostr_index(role_table_t *table, int nostr_index);
/* Register a SELECTOR_ROLE_PATH role bound to an explicit derivation path template. */
int role_table_register_role_path(role_table_t *table, const char *name, const char *path,
role_purpose_t purpose, role_curve_t curve,
int range_lo, int range_hi, int default_index,
const int *allowed_indices, int allowed_count);
/*
* Check whether a concrete derivation path matches a role's path template.
* The template may contain a "%d" placeholder (with optional "'" hardened marker).
* Returns 1 if the path matches the template, 0 if not.
*/
int role_path_matches_template(const char *path, const char *template);
/* from selector.h */
/* Error codes for selector resolution */
#define SELECTOR_OK 0
#define SELECTOR_ERR_AMBIGUOUS -1 /* multiple selectors specified */
#define SELECTOR_ERR_NOT_FOUND -2 /* no matching role in table */
#define SELECTOR_ERR_NO_DEFAULT -3 /* no selector given and no "main" role exists */
#define SELECTOR_ERR_PATH_MISMATCH -4 /* role_path doesn't match role's template */
#define SELECTOR_ERR_NOSTR_INDEX_DEPRECATED -5 /* nostr_index is deprecated */
#define SELECTOR_ERR_INDEX_DEPRECATED -6 /* index is deprecated for nostr verbs */
#define SELECTOR_ERR_ROLE_REQUIRED -7 /* --role is required when using --path */
#define SELECTOR_ERR_PATH_REQUIRED -8 /* --path is required for roles with variable path templates */
/* Parsed selector from a request's options object */
typedef struct {
int has_role; /* 1 if "role" field was present */
char role_name[ROLE_NAME_MAX];
int has_nostr_index; /* 1 if "nostr_index" field was present */
int nostr_index;
int has_role_path; /* 1 if "role_path" field was present */
char role_path[ROLE_PATH_MAX];
int has_index; /* 1 if "index" field was present (for named path-roles) */
int index; /* index value for named path-role template */
} selector_request_t;
/* Initialize a selector request (all fields zeroed/unset) */
void selector_request_init(selector_request_t *req);
/*
* Resolve a selector request against the role table.
* On success (returns SELECTOR_OK), *out points to the matched role_entry_t.
* On failure, returns one of the SELECTOR_ERR_* codes and *out is NULL.
*/
int selector_resolve(const selector_request_t *req, role_table_t *table, role_entry_t **out);
/*
* Return a human-readable error string for a selector error code.
*/
const char *selector_strerror(int err);
/* from enforcement.h */
/* Error codes */
#define ENFORCE_OK 0
#define ENFORCE_ERR_PURPOSE -1 /* purpose mismatch */
#define ENFORCE_ERR_CURVE -2 /* curve mismatch */
#define ENFORCE_ERR_UNKNOWN_VERB -3 /* verb not recognized */
#define ENFORCE_ERR_ALGORITHM -4 /* algorithm not valid for verb */
/* New algorithm-based verb defines (algorithm is a parameter, not implicit) */
#define VERB_SIGN "sign"
#define VERB_VERIFY "verify"
#define VERB_ENCAPSULATE "encapsulate"
#define VERB_DECAPSULATE "decapsulate"
#define VERB_DERIVE_SHARED "derive_shared_secret"
#define VERB_DERIVE "derive"
#define ENFORCE_ERR_ALGORITHM -4 /* algorithm not valid for verb */
/* New algorithm-based verb defines (algorithm is a parameter, not implicit) */
#define VERB_SIGN "sign"
#define VERB_VERIFY "verify"
#define VERB_ENCAPSULATE "encapsulate"
#define VERB_DECAPSULATE "decapsulate"
#define VERB_DERIVE_SHARED "derive_shared_secret"
#define VERB_DERIVE "derive"
/* Known verbs */
#define VERB_GET_PUBLIC_KEY "get_public_key"
#define VERB_NOSTR_GET_PUBLIC_KEY "nostr_get_public_key"
#define VERB_NOSTR_SIGN_EVENT "nostr_sign_event"
#define VERB_NOSTR_NIP44_ENCRYPT "nostr_nip44_encrypt"
#define VERB_NOSTR_NIP44_DECRYPT "nostr_nip44_decrypt"
#define VERB_NOSTR_NIP04_ENCRYPT "nostr_nip04_encrypt"
#define VERB_NOSTR_NIP04_DECRYPT "nostr_nip04_decrypt"
/*
* Check whether `verb` is allowed to execute against `role`.
* Returns ENFORCE_OK if allowed, or an ENFORCE_ERR_* code.
*
* The enforcement rules are:
* - All nostr verbs (nostr_sign_event, nostr_get_public_key, nostr_nip44_*, nostr_nip04_*) require:
* purpose == PURPOSE_NOSTR and curve == CURVE_SECP256K1
* - Unknown verbs return ENFORCE_ERR_UNKNOWN_VERB (fail-closed).
*/
int enforce_verb_role(const char *verb, const role_entry_t *role);
/*
* Return a human-readable error string for an enforcement error code.
*/
const char *enforce_strerror(int err);
/* from policy.h */
#define POLICY_MAX_ENTRIES 32
#define POLICY_MAX_VERBS 16
#define POLICY_MAX_ROLES 16
#define POLICY_MAX_PURPOSES 8
#define POLICY_VERB_MAX_LEN 32
#define POLICY_CALLER_MAX_LEN 160
#define POLICY_MAX_ALGS 16
#define POLICY_MAX_ALGS 16
/* Prompt behavior */
typedef enum {
PROMPT_NEVER = 0,
PROMPT_FIRST_PER_BOOT,
PROMPT_EVERY_REQUEST,
PROMPT_DENY
} prompt_mode_t;
typedef enum {
POLICY_SOURCE_DEFAULT = 0, /* the catch-all entry */
POLICY_SOURCE_PREAPPROVE, /* from --preapprove CLI flag */
POLICY_SOURCE_SESSION_GRANT /* from prompt [a] during session */
} policy_source_t;
/* A single policy entry */
typedef struct {
char caller[POLICY_CALLER_MAX_LEN]; /* e.g. "uid:1000" or "*" for any */
char verbs[POLICY_MAX_VERBS][POLICY_VERB_MAX_LEN];
int verb_count;
char roles[POLICY_MAX_ROLES][ROLE_NAME_MAX];
int role_count;
char purposes[POLICY_MAX_PURPOSES][ROLE_PURPOSE_MAX];
int purpose_count;
/* Algorithm-based (new) */
char algorithms[16][32]; /* algorithm names; POLICY_MAX_ALGS */
int alg_count;
int index_min; /* -1 = any */
int index_max; /* -1 = any */
/* Common */
prompt_mode_t prompt;
policy_source_t source;
} policy_entry_t;
/* Policy table */
typedef struct {
policy_entry_t entries[POLICY_MAX_ENTRIES];
int count;
} policy_table_t;
/* Policy check result */
#define POLICY_ALLOW 0
#define POLICY_ALLOW_SESSION_VERB 3
#define POLICY_ALLOW_SESSION_ALL 4
#define POLICY_DENY -1
#define POLICY_PROMPT -2 /* would need user confirmation */
#define POLICY_NO_MATCH -3 /* no policy entry matched (fail-closed = deny) */
/* Initialize policy table */
void policy_table_init(policy_table_t *table);
/* Initialize default policy: allow same-uid, deny others */
void policy_init_default(policy_table_t *table, uid_t owner_uid);
/* Add a policy entry. Returns 0 on success, -1 if full. */
int policy_table_add(policy_table_t *table, const policy_entry_t *entry);
/* Insert an entry before the final catch-all rule. */
int policy_table_insert_before_last(policy_table_t *table, const policy_entry_t *entry);
/* Parse a --preapprove spec into a policy entry. */
int parse_preapprove_spec(const char *spec, policy_entry_t *out_entry, int *out_nostr_index);
/*
* Check whether caller_id is allowed to invoke `verb` on `role_name` with given `purpose`.
* Returns POLICY_ALLOW, POLICY_DENY, POLICY_PROMPT, or POLICY_NO_MATCH.
*/
int policy_check(const policy_table_t *table, const char *caller_id,
const char *verb, const char *role_name, const char *purpose,
policy_source_t *out_source);
/* Check whether caller_id is allowed to invoke `verb` with the given
* algorithm and index (algorithm-based policy). Returns POLICY_ALLOW,
* POLICY_DENY, POLICY_PROMPT, or POLICY_NO_MATCH. */
int policy_check_algorithm(const policy_table_t *table, const char *caller_id,
const char *verb, const char *algorithm, int index,
policy_source_t *out_source);
/* Check whether caller_id is allowed to invoke `verb` with the given
* algorithm and index (algorithm-based policy). Returns POLICY_ALLOW,
* POLICY_DENY, POLICY_PROMPT, or POLICY_NO_MATCH. */
int policy_check_algorithm(const policy_table_t *table, const char *caller_id,
const char *verb, const char *algorithm, int index,
policy_source_t *out_source);
/* Parse prompt mode from string */
prompt_mode_t prompt_mode_from_str(const char *s);
/* Prompt mode to string */
const char *prompt_mode_to_str(prompt_mode_t m);
/* from pq_crypto.h */
/* Algorithm identifiers */
typedef enum {
CRYPTO_ALG_SECP256K1 = 0, /* existing, Nostr */
CRYPTO_ALG_ED25519, /* new, SSH signatures */
CRYPTO_ALG_X25519, /* new, key agreement */
CRYPTO_ALG_ML_DSA_65, /* new, PQ signatures */
CRYPTO_ALG_SLH_DSA_128S, /* new, PQ signatures */
CRYPTO_ALG_ML_KEM_768, /* new, PQ KEM */
CRYPTO_ALG_UNKNOWN
} crypto_alg_t;
/* Key sizes for each algorithm (compile-time constants) */
typedef struct {
size_t priv_key_len;
size_t pub_key_len;
size_t sig_len; /* 0 for KEM */
size_t ciphertext_len; /* 0 for signatures */
size_t shared_secret_len; /* 0 for signatures */
} crypto_alg_sizes_t;
/* Get size info for an algorithm. Returns NULL for CRYPTO_ALG_UNKNOWN. */
const crypto_alg_sizes_t *crypto_alg_get_sizes(crypto_alg_t alg);
/* Map role_curve_t + role_purpose_t to crypto_alg_t.
* Returns CRYPTO_ALG_UNKNOWN for unsupported combinations. */
crypto_alg_t crypto_alg_from_role(role_curve_t curve, role_purpose_t purpose);
/* Convert crypto_alg_t to string. Returns NULL for unknown. */
const char *crypto_alg_to_str(crypto_alg_t alg);
/* Parse string to crypto_alg_t. Returns CRYPTO_ALG_UNKNOWN for unrecognized. */
crypto_alg_t crypto_alg_from_str(const char *s);
/* ed25519: derive keypair from a 32-byte seed.
* priv_out and pub_out must be at least 32 bytes each.
* Returns 0 on success, -1 on error. */
int crypto_ed25519_keygen_from_seed(const unsigned char *seed, size_t seed_len,
unsigned char *priv_out, unsigned char *pub_out);
/* ed25519: sign a message. priv is 32-byte private key.
* sig_out must be at least 64 bytes. Returns 0 on success, -1 on error. */
int crypto_ed25519_sign(const unsigned char *priv, size_t priv_len,
const unsigned char *msg, size_t msg_len,
unsigned char *sig_out, size_t *sig_out_len);
/* ed25519: verify a signature. pub is 32-byte public key.
* Returns 0 on valid, 1 on invalid, -1 on error. */
int crypto_ed25519_verify(const unsigned char *pub, size_t pub_len,
const unsigned char *msg, size_t msg_len,
const unsigned char *sig, size_t sig_len);
/* x25519: derive keypair from a 32-byte seed.
* priv_out and pub_out must be at least 32 bytes each.
* Returns 0 on success, -1 on error. */
int crypto_x25519_keygen_from_seed(const unsigned char *seed, size_t seed_len,
unsigned char *priv_out, unsigned char *pub_out);
/* x25519: derive shared secret from our private key and peer's public key.
* shared_out must be at least 32 bytes. Returns 0 on success, -1 on error. */
int crypto_x25519_ecdh(const unsigned char *our_priv, size_t priv_len,
const unsigned char *peer_pub, size_t pub_len,
unsigned char *shared_out, size_t *shared_out_len);
/* Derive a 32-byte seed from a mnemonic using a BIP-44 path (SLIP-0010).
* seed_out must be at least 32 bytes. Returns 0 on success, -1 on error. */
int crypto_derive_seed_from_mnemonic(const char *mnemonic, const char *path,
unsigned char *seed_out, size_t seed_out_len);
/* ML-DSA-65: generate keypair from a 32-byte seed (deterministic).
* priv_out must be at least 4032 bytes, pub_out at least 1952 bytes.
* Returns 0 on success, -1 on error. */
int crypto_ml_dsa_65_keygen_from_seed(const unsigned char *seed, size_t seed_len,
unsigned char *priv_out, unsigned char *pub_out);
/* ML-DSA-65: sign a message. priv is 4032-byte private key.
* sig_out must be at least 3309 bytes. Returns 0 on success, -1 on error. */
int crypto_ml_dsa_65_sign(const unsigned char *priv, size_t priv_len,
const unsigned char *msg, size_t msg_len,
unsigned char *sig_out, size_t *sig_out_len);
/* ML-DSA-65: verify a signature. pub is 1952-byte public key.
* Returns 0 on valid, 1 on invalid, -1 on error. */
int crypto_ml_dsa_65_verify(const unsigned char *pub, size_t pub_len,
const unsigned char *msg, size_t msg_len,
const unsigned char *sig, size_t sig_len);
/* SLH-DSA-128s: generate keypair from a 32-byte seed (deterministic).
* priv_out must be at least 64 bytes, pub_out at least 32 bytes.
* Returns 0 on success, -1 on error. */
int crypto_slh_dsa_128s_keygen_from_seed(const unsigned char *seed, size_t seed_len,
unsigned char *priv_out, unsigned char *pub_out);
/* SLH-DSA-128s: sign a message. priv is 64-byte private key.
* sig_out must be at least 7856 bytes. Returns 0 on success, -1 on error. */
int crypto_slh_dsa_128s_sign(const unsigned char *priv, size_t priv_len,
const unsigned char *msg, size_t msg_len,
unsigned char *sig_out, size_t *sig_out_len);
/* SLH-DSA-128s: verify a signature. pub is 32-byte public key.
* Returns 0 on valid, 1 on invalid, -1 on error. */
int crypto_slh_dsa_128s_verify(const unsigned char *pub, size_t pub_len,
const unsigned char *msg, size_t msg_len,
const unsigned char *sig, size_t sig_len);
/* ML-KEM-768: generate keypair from a 32-byte seed (deterministic).
* priv_out must be at least 2400 bytes, pub_out at least 1184 bytes.
* Returns 0 on success, -1 on error. */
int crypto_ml_kem_768_keygen_from_seed(const unsigned char *seed, size_t seed_len,
unsigned char *priv_out, unsigned char *pub_out);
/* ML-KEM-768: encapsulate. pub is 1184-byte public key.
* ct_out must be at least 1088 bytes, ss_out at least 32 bytes.
* Returns 0 on success, -1 on error. */
int crypto_ml_kem_768_encaps(const unsigned char *pub, size_t pub_len,
unsigned char *ct_out, unsigned char *ss_out);
/* ML-KEM-768: decapsulate. priv is 2400-byte secret key, ct is 1088-byte ciphertext.
* ss_out must be at least 32 bytes. Returns 0 on success, -1 on error. */
int crypto_ml_kem_768_decaps(const unsigned char *priv, size_t priv_len,
const unsigned char *ct, size_t ct_len,
unsigned char *ss_out);
/* Deterministic PRNG for PQ keygen (replaces PQClean randombytes()). */
void pq_drbg_init(const unsigned char *seed, size_t seed_len);
int pq_drbg_randombytes(unsigned char *buf, size_t len);
void pq_drbg_zeroize(void);
/* from crypto.h */
/* Per-role derived key material (stored in secure memory) */
typedef struct {
secure_buf_t private_key; /* mlock'd, variable size per algorithm */
secure_buf_t public_key; /* mlock'd, variable size per algorithm */
char pubkey_hex[8192]; /* hex-encoded public key (PQ pubkeys are large) */
char npub[128]; /* bech32 npub (secp256k1 only, empty for others) */
crypto_alg_t alg; /* which algorithm this key was derived for */
int valid;
} derived_key_t;
/* Key store — holds derived keys for all roles */
typedef struct {
derived_key_t keys[ROLE_TABLE_MAX_ENTRIES];
int count;
} key_store_t;
/* Derive keys for all roles in the table using the loaded mnemonic.
* Populates key_store and sets role->pubkey_hex and role->derived for each role.
* Only derives for roles with purpose=nostr and curve=secp256k1 (for now).
* Returns number of keys derived, or -1 on error. */
int crypto_derive_all(key_store_t *store, role_table_t *table, const mnemonic_state_t *mnemonic);
/* Get the derived private key for a role (by table index). Returns NULL if not derived. */
const unsigned char *crypto_get_private_key(const key_store_t *store, int role_index);
/* Get the derived public key hex for a role. Returns NULL if not derived. */
const char *crypto_get_pubkey_hex(const key_store_t *store, int role_index);
/* Sign a Nostr event. event_json is the unsigned event JSON string.
* Returns a newly-allocated string containing the signed event JSON, or NULL on error.
* Caller must free() the returned string. */
char *crypto_sign_event(const key_store_t *store, int role_index, const char *event_json);
/* Zeroize all derived keys in the store. */
void crypto_wipe(key_store_t *store);
/* from alg_api.h */
/* Check whether a verb is valid for an algorithm (algorithm-based enforcement).
* Returns ENFORCE_OK, ENFORCE_ERR_ALGORITHM, or ENFORCE_ERR_UNKNOWN_VERB.
* Does NOT check purpose — purpose is irrelevant for the new verbs. */
int enforce_verb_algorithm(const char *verb, crypto_alg_t alg);
/* secp256k1 Schnorr (BIP-340) sign arbitrary bytes.
* priv is 32-byte scalar, pub is 32-byte x-only pubkey, sig_out is 64 bytes.
* Hashes the message with SHA-256 before signing (like Nostr event signing).
* Returns 0 on success, -1 on error. */
int crypto_secp256k1_schnorr_sign(const unsigned char *priv, size_t priv_len,
const unsigned char *msg, size_t msg_len,
unsigned char *sig_out, size_t *sig_out_len);
/* secp256k1 Schnorr (BIP-340) verify.
* pub is 32-byte x-only pubkey, sig is 64 bytes.
* Returns 0 on valid, 1 on invalid, -1 on error. */
int crypto_secp256k1_schnorr_verify(const unsigned char *pub, size_t pub_len,
const unsigned char *msg, size_t msg_len,
const unsigned char *sig, size_t sig_len);
/* secp256k1 ECDSA sign arbitrary bytes.
* priv is 32-byte scalar, sig_out must be at least 64 bytes (compact DER r||s).
* Hashes the message with SHA-256 before signing.
* Returns 0 on success, -1 on error. */
int crypto_secp256k1_ecdsa_sign(const unsigned char *priv, size_t priv_len,
const unsigned char *msg, size_t msg_len,
unsigned char *sig_out, size_t *sig_out_len);
/* secp256k1 ECDSA verify.
* pub is 32-byte x-only pubkey (converted internally to compressed form).
* sig is 64-byte compact (r||s). Returns 0 on valid, 1 on invalid, -1 on error. */
int crypto_secp256k1_ecdsa_verify(const unsigned char *pub, size_t pub_len,
const unsigned char *msg, size_t msg_len,
const unsigned char *sig, size_t sig_len);
/* ---- Algorithm key cache ----
* On-demand key derivation by algorithm+index, separate from the role-based
* key_store. Holds up to ALG_KEY_CACHE_MAX derived keys in secure memory.
* When full, the oldest entry is evicted (FIFO). */
#define ALG_KEY_CACHE_MAX 32
typedef struct {
crypto_alg_t alg;
int index;
secure_buf_t private_key;
secure_buf_t public_key;
char pubkey_hex[8192];
char key_id[17];
int valid;
} alg_key_entry_t;
typedef struct {
alg_key_entry_t entries[ALG_KEY_CACHE_MAX];
int count;
} algorithm_key_cache_t;
/* Initialize an empty cache. */
void alg_key_cache_init(algorithm_key_cache_t *cache);
/* Zeroize and free all entries. Idempotent. */
void alg_key_cache_wipe(algorithm_key_cache_t *cache);
/* Look up a cached entry by (alg, index). Returns NULL if not present. */
const alg_key_entry_t *alg_key_cache_get(algorithm_key_cache_t *cache, crypto_alg_t alg, int index);
/* Derive a key on-demand by (alg, index) and store it in the cache.
* Uses the standard derivation path for the algorithm.
* Returns 0 on success, -1 on error. */
int alg_key_cache_derive(algorithm_key_cache_t *cache, const mnemonic_state_t *mnemonic, crypto_alg_t alg, int index);
/* from dispatcher.h */
/* Dispatcher context — holds references to shared state */
typedef struct {
role_table_t *role_table;
mnemonic_state_t *mnemonic;
key_store_t *key_store;
algorithm_key_cache_t *alg_key_cache; /* algorithm-based on-demand keys */
} dispatcher_ctx_t;
/* Initialize dispatcher context */
void dispatcher_init(dispatcher_ctx_t *ctx, role_table_t *table, mnemonic_state_t *mnemonic, key_store_t *key_store, algorithm_key_cache_t *alg_key_cache);
/*
* Process a JSON-RPC request string and produce a JSON-RPC response string.
*
* The caller owns the returned string and must free() it.
* Returns NULL only on catastrophic allocation failure.
*
* Response format on success:
* { "id": "...", "result": "..." }
*
* Response format on error:
* { "id": "...", "error": { "code": <int>, "message": "..." } }
*
* Error codes:
* -32700 Parse error (invalid JSON)
* -32600 Invalid request (missing id/method/params)
* -32601 Method not found (unknown verb after enforcement)
* -32602 Invalid params
* 1001 ambiguous_role_selector
* 1002 role_not_found
* 1003 no_default_role
* 1004 purpose_mismatch
* 1005 curve_mismatch
* 1006 mnemonic_not_loaded
*/
char *dispatcher_handle_request(dispatcher_ctx_t *ctx, const char *json_request);
/* from server.h */
#define SERVER_SOCKET_NAME_MAX 108
#define SERVER_MAX_MSG_SIZE 16777216
#define NSIGNER_LISTEN_UNIX 0
#define NSIGNER_LISTEN_STDIO 1
#define NSIGNER_LISTEN_QREXEC 2
#define NSIGNER_LISTEN_TCP 3
#define NSIGNER_LISTEN_HTTP 4
#define NSIGNER_AUTH_OFF 0
#define NSIGNER_AUTH_OPTIONAL 1
#define NSIGNER_AUTH_REQUIRED 2
/* Caller identity */
typedef struct {
uid_t uid;
gid_t gid;
pid_t pid;
int kind;
char caller_id[POLICY_CALLER_MAX_LEN]; /* "uid:<n>" or "qubes:<vm>" */
char source_qube[64];
} caller_identity_t;
/* Server context */
#define INDEX_WHITELIST_MAX 256
#define INDEX_WHITELIST_BITMAP_SIZE (INDEX_WHITELIST_MAX / 8)
#define PATH_WHITELIST_MAX_TEMPLATES 16
#define PATH_TEMPLATE_MAX_LEN 128
#define PATH_TEMPLATE_MAX_INDICES 64 /* max allowed indices per template (for sets) */
typedef struct {
char template[PATH_TEMPLATE_MAX_LEN]; /* e.g. "m/44'/1237'/%d/1/0" — one %d placeholder */
int range_lo; /* inclusive lower bound (for range form) */
int range_hi; /* inclusive upper bound (== range_lo for single) */
int allowed_indices[PATH_TEMPLATE_MAX_INDICES]; /* explicit set of allowed indices */
int allowed_count; /* 0 = use range_lo/range_hi; >0 = use allowed_indices */
} path_template_t;
typedef struct {
int active; /* 1 if any path templates are configured */
int count;
path_template_t templates[PATH_WHITELIST_MAX_TEMPLATES];
} path_whitelist_t;
typedef struct {
char socket_name[SERVER_SOCKET_NAME_MAX]; /* abstract namespace name (without \0 prefix) */
char last_error[256];
int listen_fd;
int running;
int listen_mode;
int stdio_handled;
dispatcher_ctx_t *dispatcher;
policy_table_t *policy;
int socket_name_explicit;
int auth_mode;
int auth_skew_seconds;
int bridge_source_trusted;
int index_whitelist_active;
unsigned char index_whitelist[INDEX_WHITELIST_BITMAP_SIZE];
path_whitelist_t path_whitelist; /* path-template whitelist for role_path requests */
} server_ctx_t;
/* Initialize server context. socket_name is the abstract namespace name (e.g. "nsigner").
* socket_name_explicit should be non-zero when provided via --socket-name override. */
void server_init(server_ctx_t *ctx, const char *socket_name, int socket_name_explicit,
int listen_mode,
int auth_mode,
int auth_skew_seconds,
dispatcher_ctx_t *dispatcher, policy_table_t *policy);
/* Start listening. Returns 0 on success, -1 on error. */
int server_start(server_ctx_t *ctx);
/* Get human-readable description of last server error. */
const char *server_last_error(const server_ctx_t *ctx);
/* Handle one pending connection (non-blocking). Returns 1 if handled, 0 if nothing pending, -1 on error.
* activity_cb is called with a description string for the TUI activity log. */
typedef void (*server_activity_cb)(const char *message, void *user_data);
int server_handle_one(server_ctx_t *ctx, server_activity_cb cb, void *cb_data);
/* Stop server and close socket */
void server_stop(server_ctx_t *ctx);
/* Extract caller identity from connected fd */
int server_get_caller(int fd, caller_identity_t *out);
/* Configure interactive policy-prompt behavior for current session */
void server_set_prompt_always_allow(int enabled);
/* Mark the unix listener as a trusted bridge socket (qrexec source preamble) */
void server_set_bridge_source_trusted(server_ctx_t *ctx, int enabled);
/* Set the nostr_index whitelist from a spec string ("all", "1,3,4", "0-3", "0-3,7,9") */
int server_set_index_whitelist(server_ctx_t *ctx, const char *spec);
/* Set the unified whitelist (integer nostr_index + path templates) from a spec string.
* Spec: "all", or comma-separated tokens. Integer tokens ("0-3","1,3,4") set the
* nostr_index bitmap. Path-template tokens ("m/44'/1237'/0-3/1/0") set the path whitelist. */
int server_set_path_whitelist(server_ctx_t *ctx, const char *spec);
/* Check if a role_path is allowed by the path whitelist. Returns 1 if allowed, 0 if not. */
int server_path_whitelist_allows(const server_ctx_t *ctx, const char *role_path);
/* Configure non-interactive prompt fallback: -1 disabled, POLICY_ALLOW, or POLICY_DENY */
void server_set_noninteractive_prompt_default(int decision);
typedef struct {
const caller_identity_t *caller;
const char *method;
const char *role_name;
const char *purpose;
int pending_derivation;
const char *fips_peer_npub;
const char *fips_peer_name;
} server_approval_request_t;
typedef int (*server_approval_cb)(const server_approval_request_t *req, void *user_data);
void server_set_approval_cb(server_approval_cb cb, void *user_data);
/* from socket_name.h */
/*
* Generate random socket name in format: nsigner_<word1>_<word2>
* Returns 0 on success, -1 on error.
*/
int socket_name_random(char *out, size_t out_len);
/* from main.h */
/*
* nsigner main header - version information
*
* Version macros are auto-updated by increment_and_push.sh.
*/
/* Version information (auto-updated by build/version tooling) */
#define NSIGNER_VERSION_MAJOR 0
#define NSIGNER_VERSION_MINOR 1
#define NSIGNER_VERSION_PATCH 22
#define NSIGNER_VERSION "v0.1.22"
/* NSIGNER_HEADERLESS_DECLS_END */
int transport_send_framed(int fd, const char *payload);
int transport_recv_framed(int fd, char **out_payload, size_t max_size);
#include "auth_envelope.h"
#include "tui_continuous.h"
#include <nostr_core/nostr_common.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <poll.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <strings.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/un.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#define NSIGNER_DEFAULT_SOCKET_NAME "nsigner"
#define NSIGNER_QREXEC_SERVICE_NAME "qubes.NsignerRpc"
#define ACTIVITY_LOG_CAP 16
#define CONNECTION_INFO_CAP 8
#define CONNECTION_INFO_STR_MAX 256
typedef struct {
char lines[ACTIVITY_LOG_CAP][256];
int count;
} activity_log_t;
/* Structured connection info for the on-demand connection display.
* Each entry represents one transport block: a title (e.g. "Unix socket"),
* a connection string (the address/endpoint), an optional example command,
* and an optional extra line (e.g. qrexec bridge info under Unix). */
typedef struct {
char title[64];
char connection_string[CONNECTION_INFO_STR_MAX];
char example[CONNECTION_INFO_STR_MAX]; /* empty if none */
char extra[CONNECTION_INFO_STR_MAX]; /* empty if none */
} connection_info_entry_t;
static volatile sig_atomic_t g_running = 1;
static activity_log_t g_activity_log;
typedef enum {
MNEMONIC_SOURCE_TUI = 0,
MNEMONIC_SOURCE_STDIN,
MNEMONIC_SOURCE_FD
} mnemonic_source_kind_t;
typedef struct {
mnemonic_source_kind_t kind;
int fd;
} mnemonic_source_t;
static mnemonic_source_kind_t g_startup_mnemonic_source_kind = MNEMONIC_SOURCE_TUI;
static connection_info_entry_t g_connection_info[CONNECTION_INFO_CAP];
static int g_connection_info_count = 0;
/* OTP pad status line (shown at bottom of connection display) */
static char g_otp_pad_status[CONNECTION_INFO_STR_MAX];
static const TuiMenuItem g_main_menu_items[] = {
{"^_l^: lock/reunlock", 'l'},
{"^_r^: refresh", 'r'},
{"^_d^: display connections", 'd'},
{"^_q^:/x quit", 'q'}
};
typedef struct {
const role_table_t *role_table;
} role_table_view_data_t;
typedef struct {
const role_table_t *role_table;
const mnemonic_state_t *mnemonic;
int *derived_count;
const char *socket_name;
} main_tui_context_t;
static void render_status(const role_table_t *role_table,
const mnemonic_state_t *mnemonic,
int derived_count,
const char *socket_name);
static void render_connections(const role_table_t *role_table,
const mnemonic_state_t *mnemonic,
int derived_count,
const char *socket_name);
static void connection_info_clear(void) {
g_connection_info_count = 0;
memset(g_connection_info, 0, sizeof(g_connection_info));
g_otp_pad_status[0] = '\0';
}
/* Add a transport block to the connection info.
* title: transport name (e.g. "Unix socket", "FIPS", "HTTP")
* connection_str: the address/endpoint clients use to reach the signer
* example: example client command (empty string "" if none)
* extra: optional extra line under the block (e.g. qrexec info; "" if none) */
static void connection_info_add_transport(const char *title,
const char *connection_str,
const char *example,
const char *extra) {
connection_info_entry_t *e;
if (g_connection_info_count >= CONNECTION_INFO_CAP) {
return;
}
e = &g_connection_info[g_connection_info_count];
memset(e, 0, sizeof(*e));
if (title) { strncpy(e->title, title, sizeof(e->title) - 1); }
if (connection_str) { strncpy(e->connection_string, connection_str, sizeof(e->connection_string) - 1); }
if (example) { strncpy(e->example, example, sizeof(e->example) - 1); }
if (extra) { strncpy(e->extra, extra, sizeof(e->extra) - 1); }
g_connection_info_count++;
}
/* Set the OTP pad status line (shown at bottom of connection display). */
static void connection_info_set_otp(const char *fmt, ...) {
va_list ap;
if (fmt == NULL) { g_otp_pad_status[0] = '\0'; return; }
va_start(ap, fmt);
(void)vsnprintf(g_otp_pad_status, sizeof(g_otp_pad_status), fmt, ap);
va_end(ap);
}
static void handle_signal(int sig) {
(void)sig;
g_running = 0;
}
static int read_line_stdin(char *buf, size_t buf_sz) {
size_t len;
if (buf == NULL || buf_sz == 0) {
return -1;
}
if (fgets(buf, (int)buf_sz, stdin) == NULL) {
return -1;
}
len = strlen(buf);
while (len > 0 && (buf[len - 1] == '\n' || buf[len - 1] == '\r')) {
buf[len - 1] = '\0';
len--;
}
return 0;
}
/*
* Read a line from stdin with inline editing support, using termios raw mode.
* Pre-fills the buffer with `prefill` (if non-NULL), positions the cursor at
* the end, and allows arrow-key navigation, backspace, delete, home, end,
* and regular character insertion. On Enter, returns the edited string in
* `buf`. Returns 0 on success, -1 on error/EOF.
*
* Only works when stdin is a TTY. Falls back to read_line_stdin if not a TTY
* (in which case prefill is ignored).
*
* `prompt` is the label text printed before the editable field (e.g.
* " Role name [main]: "). It is reprinted on every redraw so that the
* prompt does not disappear when the user starts editing.
*/
static int read_line_editable(char *buf, size_t buf_sz, const char *prefill,
const char *prompt) {
struct termios old_term, new_term;
size_t len = 0; /* current text length */
size_t pos = 0; /* cursor position (0..len) */
size_t prompt_len = 0;/* length of prompt string (for cursor math) */
int fd = STDIN_FILENO;
int was_raw = 0;
if (buf == NULL || buf_sz == 0) {
return -1;
}
if (prompt != NULL) {
prompt_len = strlen(prompt);
}
/* If not a TTY, fall back to plain fgets */
if (!isatty(fd)) {
return read_line_stdin(buf, buf_sz);
}
/* Pre-fill */
if (prefill != NULL) {
len = strlen(prefill);
if (len >= buf_sz) len = buf_sz - 1;
memcpy(buf, prefill, len);
buf[len] = '\0';
pos = len;
} else {
buf[0] = '\0';
}
/* Enter raw mode */
if (tcgetattr(fd, &old_term) == 0) {
new_term = old_term;
new_term.c_lflag &= ~(ICANON | ECHO);
new_term.c_cc[VMIN] = 1;
new_term.c_cc[VTIME] = 0;
if (tcsetattr(fd, TCSANOW, &new_term) == 0) {
was_raw = 1;
}
}
/* Draw the initial prompt + pre-filled text */
if (prompt != NULL) {
fputs(prompt, stdout);
}
if (len > 0) {
fputs(buf, stdout);
}
fflush(stdout);
for (;;) {
char ch;
ssize_t n = read(fd, &ch, 1);
if (n <= 0) {
if (was_raw) tcsetattr(fd, TCSANOW, &old_term);
return -1;
}
if (ch == '\n' || ch == '\r') {
/* Enter — done */
buf[len] = '\0';
fputc('\n', stdout);
fflush(stdout);
break;
} else if (ch == 0x7f || ch == 0x08) {
/* Backspace (DEL or BS) — delete char before cursor */
if (pos > 0) {
size_t i;
for (i = pos - 1; i < len - 1; i++) {
buf[i] = buf[i + 1];
}
len--;
pos--;
buf[len] = '\0';
/* Redraw: move to start of field, clear line, redraw, reposition */
fputs("\r\033[K", stdout); /* CR + clear to end of line */
if (prompt != NULL) fputs(prompt, stdout);
fputs(buf, stdout);
if (pos < len) {
/* Move cursor left to pos */
printf("\033[%zuD", len - pos);
}
fflush(stdout);
}
} else if (ch == 0x1b) {
/* Escape sequence — arrow keys, etc. */
char seq[2];
if (read(fd, &seq[0], 1) <= 0) continue;
if (read(fd, &seq[1], 1) <= 0) continue;
if (seq[0] == '[') {
if (seq[1] == 'D') {
/* Left arrow */
if (pos > 0) {
pos--;
fputs("\033[D", stdout);
fflush(stdout);
}
} else if (seq[1] == 'C') {
/* Right arrow */
if (pos < len) {
pos++;
fputs("\033[C", stdout);
fflush(stdout);
}
} else if (seq[1] == 'A' || seq[1] == 'B') {
/* Up/Down — ignore */
} else if (seq[1] == 'H') {
/* Home — move to start */
if (pos > 0) {
printf("\033[%zuD", pos);
pos = 0;
fflush(stdout);
}
} else if (seq[1] == 'F') {
/* End — move to end */
if (pos < len) {
printf("\033[%zuC", len - pos);
pos = len;
fflush(stdout);
}
} else if (seq[1] == '3') {
/* Delete (Delete key = ESC [ 3 ~ ) */
char tilde;
if (read(fd, &tilde, 1) <= 0) continue;
if (tilde == '~' && pos < len) {
size_t i;
for (i = pos; i < len - 1; i++) {
buf[i] = buf[i + 1];
}
len--;
buf[len] = '\0';
fputs("\r\033[K", stdout);
if (prompt != NULL) fputs(prompt, stdout);
fputs(buf, stdout);
if (pos < len) {
printf("\033[%zuD", len - pos);
}
fflush(stdout);
}
}
}
} else if (ch == 0x01) {
/* Ctrl-A — home */
if (pos > 0) {
printf("\033[%zuD", pos);
pos = 0;
fflush(stdout);
}
} else if (ch == 0x05) {
/* Ctrl-E — end */
if (pos < len) {
printf("\033[%zuC", len - pos);
pos = len;
fflush(stdout);
}
} else if (ch == 0x15) {
/* Ctrl-U — clear entire line */
if (pos > 0) {
fputs("\r\033[K", stdout);
if (prompt != NULL) fputs(prompt, stdout);
len = 0;
pos = 0;
buf[0] = '\0';
fflush(stdout);
}
} else if ((unsigned char)ch >= 0x20 && (unsigned char)ch < 0x7f) {
/* Regular printable character — insert at cursor */
if (len < buf_sz - 1) {
size_t i;
/* Shift characters right to make room */
for (i = len; i > pos; i--) {
buf[i] = buf[i - 1];
}
buf[pos] = ch;
len++;
buf[len] = '\0';
/* Redraw from cursor position */
fputs("\r\033[K", stdout);
if (prompt != NULL) fputs(prompt, stdout);
fputs(buf, stdout);
pos++;
if (pos < len) {
printf("\033[%zuD", len - pos);
}
fflush(stdout);
}
}
/* Ignore other control characters */
}
/* Restore terminal */
if (was_raw) {
tcsetattr(fd, TCSANOW, &old_term);
}
return 0;
}
static int read_cmd_output_local(const char *cmd, char **out_buf) {
FILE *fp;
char chunk[512];
char *buf = NULL;
size_t used = 0;
size_t cap = 0;
if (cmd == NULL || out_buf == NULL) {
return -1;
}
*out_buf = NULL;
fp = popen(cmd, "r");
if (fp == NULL) {
return -1;
}
while (fgets(chunk, sizeof(chunk), fp) != NULL) {
size_t n = strlen(chunk);
if (used + n + 1 > cap) {
size_t new_cap = (cap == 0) ? 2048 : cap * 2;
while (new_cap < used + n + 1) {
new_cap *= 2;
}
{
char *tmp = (char *)realloc(buf, new_cap);
if (tmp == NULL) {
free(buf);
(void)pclose(fp);
return -1;
}
buf = tmp;
cap = new_cap;
}
}
memcpy(buf + used, chunk, n);
used += n;
}
(void)pclose(fp);
if (buf == NULL) {
return -1;
}
buf[used] = '\0';
*out_buf = buf;
return 0;
}
static int lookup_local_fips_identity(char *out_ipv6,
size_t out_ipv6_sz,
char *out_npub,
size_t out_npub_sz) {
char *json = NULL;
cJSON *root = NULL;
cJSON *ipv6_item;
cJSON *npub_item;
if (out_ipv6 == NULL || out_ipv6_sz == 0 || out_npub == NULL || out_npub_sz == 0) {
return -1;
}
out_ipv6[0] = '\0';
out_npub[0] = '\0';
if (read_cmd_output_local("fipsctl show status 2>/dev/null", &json) != 0) {
return -1;
}
root = cJSON_Parse(json);
free(json);
if (root == NULL) {
return -1;
}
ipv6_item = cJSON_GetObjectItemCaseSensitive(root, "ipv6_addr");
npub_item = cJSON_GetObjectItemCaseSensitive(root, "npub");
if (cJSON_IsString(ipv6_item) && ipv6_item->valuestring != NULL) {
strncpy(out_ipv6, ipv6_item->valuestring, out_ipv6_sz - 1);
out_ipv6[out_ipv6_sz - 1] = '\0';
}
if (cJSON_IsString(npub_item) && npub_item->valuestring != NULL) {
strncpy(out_npub, npub_item->valuestring, out_npub_sz - 1);
out_npub[out_npub_sz - 1] = '\0';
}
cJSON_Delete(root);
return (out_ipv6[0] != '\0' && out_npub[0] != '\0') ? 0 : -1;
}
static int extract_listen_port(const char *listen_target, char *out_port, size_t out_port_sz) {
const char *port;
size_t i;
if (listen_target == NULL || out_port == NULL || out_port_sz == 0) {
return -1;
}
out_port[0] = '\0';
port = strrchr(listen_target, ':');
if (port == NULL || *(port + 1) == '\0') {
return -1;
}
port++;
for (i = 0; port[i] != '\0'; ++i) {
if (!isdigit((unsigned char)port[i])) {
return -1;
}
}
strncpy(out_port, port, out_port_sz - 1);
out_port[out_port_sz - 1] = '\0';
return 0;
}
static int connect_abstract_socket(const char *name) {
int fd;
struct sockaddr_un addr;
socklen_t addr_len;
if (name == NULL || name[0] == '\0') {
return -1;
}
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd < 0) {
return -1;
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
addr.sun_path[0] = '\0';
strncpy(&addr.sun_path[1], name, sizeof(addr.sun_path) - 2);
addr.sun_path[sizeof(addr.sun_path) - 1] = '\0';
addr_len = (socklen_t)(sizeof(sa_family_t) + 1 + strlen(name));
if (connect(fd, (struct sockaddr *)&addr, addr_len) != 0) {
close(fd);
return -1;
}
return fd;
}
static void print_usage(const char *program_name) {
tui_print("nsigner - single-binary signer program");
tui_print("Usage:");
tui_print(" %s [--socket-name|--name|-n <name>] [--listen|-l <unix|stdio|qrexec|tcp:HOST:PORT>]", program_name);
tui_print(" [--preapprove|-p <SPEC>]... [--register-role <SPEC>]...");
tui_print(" [--auth|-a <off|optional|required>]");
tui_print(" [--mnemonic-stdin|--mnemonic-fd <N>] [--allow-all|-A]");
tui_print(" [--bridge-source-trusted]");
tui_print(" Run signer server (unix mode has TUI)");
tui_print(" %s [--socket-name|--name|-n <name>] client '<json>' Send JSON-RPC request", program_name);
tui_print(" %s [--socket-name|--name|-n <name>] client - Read JSON-RPC request from stdin", program_name);
tui_print(" %s [--socket-name|--name|-n <name>] bridge [--to <name>] qrexec -> unix socket relay", program_name);
tui_print(" %s list List running nsigner abstract sockets", program_name);
tui_print(" %s --help", program_name);
tui_print(" %s --version", program_name);
tui_print("");
tui_print("Options:");
tui_print(" --listen, -l MODE Listener transport: unix|stdio|qrexec|tcp:HOST:PORT|http:HOST:PORT");
tui_print(" --preapprove, -p SPEC");
tui_print(" Pre-approve a caller for a role (repeatable)");
tui_print(" SPEC: caller=<id>,role=<name> or caller=<id>,nostr_index=<n>");
tui_print(" --register-role SPEC");
tui_print(" Register a named path-role non-interactively (repeatable)");
tui_print(" SPEC: <name>:<curve>:<path-template>");
tui_print(" e.g. nostr_range:secp256k1:m/44'/1237'/*'/0/0");
tui_print(" Suppresses the default 'main' role in non-TTY mode");
tui_print(" --auth, -a MODE Auth envelope policy per listener: off|optional|required");
tui_print(" --mnemonic-stdin Read mnemonic from stdin (one line) at startup");
tui_print(" --mnemonic-fd N Read mnemonic from inherited fd N (one line) at startup");
tui_print(" --allow-all, -A Allow all policy prompts for this server session");
tui_print(" --bridge-source-trusted Accept qrexec_source preamble on unix connections (bridge mode)");
tui_print(" --otp-pad-dir DIR Bind an OTP pad directory at startup (one pad per session)");
tui_print(" --otp-pad SPEC Pad chksum (64 hex) or unique prefix; required with --otp-pad-dir");
tui_print(" --otp-allow-blkback Allow pads on qvm-block (blkback) devices; NOT for production pads");
}
static int extract_nsigner_socket_from_proc_line(const char *line,
char *with_at,
size_t with_at_sz,
char *without_at,
size_t without_at_sz) {
const char *p;
const char *end;
size_t len_with_at;
if (line == NULL) {
return -1;
}
p = strstr(line, "@nsigner");
if (p == NULL) {
return -1;
}
if (p[8] != '\0' && p[8] != '\n' && p[8] != ' ' && p[8] != '\t' && p[8] != '_') {
return -1;
}
end = p;
while (*end != '\0' && *end != '\n' && *end != ' ' && *end != '\t') {
end++;
}
len_with_at = (size_t)(end - p);
if (len_with_at <= 1 || len_with_at > SERVER_SOCKET_NAME_MAX) {
return -1;
}
if (with_at != NULL && with_at_sz > 0) {
size_t copy_len = (len_with_at < (with_at_sz - 1)) ? len_with_at : (with_at_sz - 1);
memcpy(with_at, p, copy_len);
with_at[copy_len] = '\0';
}
if (without_at != NULL && without_at_sz > 0) {
size_t len_without_at = len_with_at - 1;
size_t copy_len = (len_without_at < (without_at_sz - 1)) ? len_without_at : (without_at_sz - 1);
memcpy(without_at, p + 1, copy_len);
without_at[copy_len] = '\0';
}
return 0;
}
static int list_sockets_main(void) {
FILE *fp;
char line[512];
int found = 0;
fp = fopen("/proc/net/unix", "r");
if (fp == NULL) {
perror("fopen(/proc/net/unix)");
return 1;
}
while (fgets(line, sizeof(line), fp) != NULL) {
char name_no_at[SERVER_SOCKET_NAME_MAX + 1];
if (extract_nsigner_socket_from_proc_line(line, NULL, 0, name_no_at, sizeof(name_no_at)) == 0) {
printf("%s\n", name_no_at);
found = 1;
}
}
fclose(fp);
if (!found) {
printf("(none)\n");
}
return 0;
}
static int discover_single_socket_name(char *out, size_t out_len) {
FILE *fp;
char line[512];
int count = 0;
if (out == NULL || out_len == 0) {
return -1;
}
out[0] = '\0';
fp = fopen("/proc/net/unix", "r");
if (fp == NULL) {
return -1;
}
while (fgets(line, sizeof(line), fp) != NULL) {
char name_no_at[SERVER_SOCKET_NAME_MAX + 1];
if (extract_nsigner_socket_from_proc_line(line, NULL, 0, name_no_at, sizeof(name_no_at)) != 0) {
continue;
}
count++;
if (count == 1) {
strncpy(out, name_no_at, out_len - 1);
out[out_len - 1] = '\0';
}
}
fclose(fp);
return (count == 1 && out[0] != '\0') ? 0 : -1;
}
static int client_main(int argc, char *argv[], const char *socket_name, int socket_name_explicit) {
int fd;
char *request = NULL;
char *response = NULL;
char *stdin_buf = NULL;
if (argc < 1) {
fprintf(stderr, "Usage: nsigner [--socket-name|--name|-n <name>] client '<json-rpc-request>' | -\n");
return 1;
}
if (strcmp(argv[0], "-") == 0) {
/* Heap-allocate the stdin buffer (SERVER_MAX_MSG_SIZE is 16MB — too
* large for the stack). */
stdin_buf = (char *)malloc(SERVER_MAX_MSG_SIZE + 1);
if (!stdin_buf) {
fprintf(stderr, "Failed to allocate stdin buffer\n");
return 1;
}
if (read_line_stdin(stdin_buf, SERVER_MAX_MSG_SIZE + 1) != 0) {
fprintf(stderr, "Failed to read request from stdin\n");
free(stdin_buf);
return 1;
}
request = stdin_buf;
} else {
request = argv[0];
}
if (!socket_name_explicit) {
char discovered[SERVER_SOCKET_NAME_MAX];
if (discover_single_socket_name(discovered, sizeof(discovered)) == 0) {
socket_name = discovered;
}
}
fd = connect_abstract_socket(socket_name);
if (fd < 0) {
fprintf(stderr, "Failed to connect to %s: %s\n", socket_name, strerror(errno));
return 1;
}
if (transport_send_framed(fd, request) != 0) {
perror("send");
close(fd);
free(stdin_buf);
return 1;
}
if (transport_recv_framed(fd, &response, SERVER_MAX_MSG_SIZE) != 0) {
perror("recv");
close(fd);
free(stdin_buf);
return 1;
}
printf("%s\n", response);
free(response);
close(fd);
free(stdin_buf);
return 0;
}
/*
* bridge_main — stateless qrexec → unix-socket relay.
*
* Used as the qubes.NsignerRpc service entrypoint. Reads one framed
* JSON-RPC request from stdin (qrexec), forwards it to a persistent
* nsigner --listen unix process, and relays one framed response back
* to stdout. Before the request, sends a source-qube preamble so the
* persistent signer can tag the caller as qubes:<source-vm>.
*
* The bridge holds no secrets and no mnemonic. It is a dumb pipe.
*
* Usage: nsigner bridge [--to <socket-name>]
* --to <name> abstract unix socket name (default: nsigner)
*
* Environment:
* QREXEC_REMOTE_DOMAIN set by qrexec to the source qube name
*/
static int bridge_main(int argc, char *argv[], const char *socket_name, int socket_name_explicit) {
const char *target_socket = socket_name;
char discovered[SERVER_SOCKET_NAME_MAX];
int fd;
char *request = NULL;
char *response = NULL;
const char *source_qube;
char preamble[256];
int i;
/* Parse bridge-specific args */
for (i = 0; i < argc; i++) {
if (strcmp(argv[i], "--to") == 0) {
if (i + 1 >= argc) {
fprintf(stderr, "bridge: --to requires a socket name\n");
return 1;
}
target_socket = argv[i + 1];
socket_name_explicit = 1;
i++;
} else if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
fprintf(stderr, "Usage: nsigner bridge [--to <socket-name>]\n");
return 0;
} else {
fprintf(stderr, "bridge: unknown argument: %s\n", argv[i]);
return 1;
}
}
if (target_socket == NULL || target_socket[0] == '\0') {
target_socket = "nsigner";
}
if (!socket_name_explicit) {
if (discover_single_socket_name(discovered, sizeof(discovered)) == 0) {
target_socket = discovered;
}
}
/* Read the source qube from the qrexec environment */
source_qube = getenv("QREXEC_REMOTE_DOMAIN");
if (source_qube == NULL || source_qube[0] == '\0') {
/* Not running under qrexec — relay anyway but with no source tag.
* The persistent signer will identify the caller by uid only. */
source_qube = "";
}
/* Connect to the persistent signer's abstract unix socket */
fd = connect_abstract_socket(target_socket);
if (fd < 0) {
fprintf(stderr, "bridge: cannot connect to %s: %s\n", target_socket, strerror(errno));
return 1;
}
/* Send the source-qube preamble (framed JSON) */
{
int plen;
plen = snprintf(preamble, sizeof(preamble),
"{\"qrexec_source\":\"%s\"}", source_qube);
if (plen < 0 || (size_t)plen >= sizeof(preamble)) {
fprintf(stderr, "bridge: source qube name too long\n");
close(fd);
return 1;
}
if (transport_send_framed(fd, preamble) != 0) {
fprintf(stderr, "bridge: failed to send preamble: %s\n", strerror(errno));
close(fd);
return 1;
}
}
/* Read one framed request from stdin (qrexec) and forward to socket */
if (transport_recv_framed(STDIN_FILENO, &request, SERVER_MAX_MSG_SIZE) != 0) {
fprintf(stderr, "bridge: failed to read request from stdin: %s\n", strerror(errno));
close(fd);
return 1;
}
if (transport_send_framed(fd, request) != 0) {
fprintf(stderr, "bridge: failed to forward request: %s\n", strerror(errno));
free(request);
close(fd);
return 1;
}
free(request);
/* Read one framed response from socket and relay to stdout (qrexec) */
if (transport_recv_framed(fd, &response, SERVER_MAX_MSG_SIZE) != 0) {
fprintf(stderr, "bridge: failed to read response from signer: %s\n", strerror(errno));
close(fd);
return 1;
}
if (transport_send_framed(STDOUT_FILENO, response) != 0) {
fprintf(stderr, "bridge: failed to relay response: %s\n", strerror(errno));
free(response);
close(fd);
return 1;
}
free(response);
close(fd);
return 0;
}
static void activity_log_cb(const char *message, void *user_data) {
int idx;
time_t now;
struct tm tm_now;
char ts[32];
(void)user_data;
if (message == NULL) {
return;
}
now = time(NULL);
if (localtime_r(&now, &tm_now) != NULL) {
(void)strftime(ts, sizeof(ts), "%Y-%m-%d %H:%M:%S", &tm_now);
} else {
strncpy(ts, "0000-00-00 00:00:00", sizeof(ts) - 1);
ts[sizeof(ts) - 1] = '\0';
}
idx = g_activity_log.count % ACTIVITY_LOG_CAP;
(void)snprintf(g_activity_log.lines[idx],
sizeof(g_activity_log.lines[idx]),
"%s %s",
ts,
message);
g_activity_log.count++;
}
static void tcp_activity_stdout_cb(const char *message, void *user_data) {
time_t now;
struct tm tm_now;
char ts[32];
(void)user_data;
if (message == NULL) {
return;
}
now = time(NULL);
if (localtime_r(&now, &tm_now) != NULL) {
(void)strftime(ts, sizeof(ts), "%Y-%m-%d %H:%M:%S", &tm_now);
} else {
strncpy(ts, "0000-00-00 00:00:00", sizeof(ts) - 1);
ts[sizeof(ts) - 1] = '\0';
}
printf("[%s] %s\n", ts, message);
fflush(stdout);
}
static void role_table_get_cell(int row, int col, char *out, size_t out_size, void *user_data) {
const role_table_view_data_t *view = (const role_table_view_data_t *)user_data;
const role_entry_t *r;
if (out == NULL || out_size == 0 || view == NULL || view->role_table == NULL ||
row < 0 || row >= view->role_table->count) {
return;
}
r = &view->role_table->entries[row];
switch (col) {
case 0:
(void)snprintf(out, out_size, "%s", r->name);
break;
case 1:
(void)snprintf(out, out_size, "%s", role_purpose_to_str(r->purpose));
break;
case 2:
(void)snprintf(out, out_size, "%s", role_curve_to_str(r->curve));
break;
case 3:
if (r->selector_type == SELECTOR_NOSTR_INDEX) {
(void)snprintf(out, out_size, "m/44'/1237'/%d'/0/0", r->nostr_index);
} else if (r->path_range_lo < 0 && r->path_allowed_count == 0) {
/* Fixed path (no %d placeholder) */
(void)snprintf(out, out_size, "%s", r->role_path);
} else {
/* Template path — replace %d with range or set description */
char range_str[64];
char display[ROLE_PATH_MAX + 64];
const char *pct;
const char *tail;
if (r->path_allowed_count > 0) {
/* Set: e.g. "1+34+54" */
int si;
int off = 0;
for (si = 0; si < r->path_allowed_count && off < (int)sizeof(range_str) - 12; ++si) {
off += snprintf(range_str + off, sizeof(range_str) - off,
"%s%d", (si == 0) ? "" : "+", r->path_allowed_indices[si]);
}
range_str[off] = '\0';
} else if (r->path_range_lo == r->path_range_hi) {
/* Single index */
snprintf(range_str, sizeof(range_str), "%d", r->path_range_lo);
} else {
/* Range */
snprintf(range_str, sizeof(range_str), "%d-%d", r->path_range_lo, r->path_range_hi);
}
/* Replace first %d in role_path with range_str */
pct = strstr(r->role_path, "%d");
if (pct != NULL) {
size_t prefix_len = (size_t)(pct - r->role_path);
tail = pct + 2; /* skip "%d" */
snprintf(display, sizeof(display), "%.*s%s%s",
(int)prefix_len, r->role_path, range_str, tail);
} else {
snprintf(display, sizeof(display), "%s", r->role_path);
}
(void)snprintf(out, out_size, "%s", display);
}
break;
default:
out[0] = '\0';
break;
}
}
/* On-demand connection instructions display (press 'd').
* Shows each transport as a titled block with the connection string
* and an example client command, with blank lines between transports. */
static void render_connections(const role_table_t *role_table,
const mnemonic_state_t *mnemonic,
int derived_count,
const char *socket_name) {
TuiFrame frame = { "n_signer", NSIGNER_VERSION, "> Connection Instructions" };
TuiSize size = tui_terminal_size();
char status_buf[256];
int i;
/* Use a full screen clear (not tui_clear_continuous) because the
* connections display is a modal view that may exceed the terminal
* height. tui_clear_continuous assumes the content fits within
* term_height lines; if it doesn't, the extra lines scroll past and
* the cursor-up can't reach them. A full clear + home cursor works
* regardless of content height. */
printf("\033[2J\033[H");
fflush(stdout);
tui_render_top_frame(&frame, size.width);
tui_print("");
for (i = 0; i < g_connection_info_count; i++) {
connection_info_entry_t *e = &g_connection_info[i];
/* Transport title */
tui_print("^*%s^:", e->title);
tui_print("");
/* Connection string (indented) */
tui_print(" %s", e->connection_string);
tui_print("");
/* Example command (if present) */
if (e->example[0] != '\0') {
tui_print(" Example:");
/* The example may contain embedded newlines for multi-line commands */
{
const char *p = e->example;
const char *nl;
while (*p != '\0') {
nl = strchr(p, '\n');
if (nl != NULL) {
tui_print(" %.*s", (int)(nl - p), p);
p = nl + 1;
} else {
tui_print(" %s", p);
break;
}
}
}
tui_print("");
}
/* Extra info (if present, e.g. qrexec bridge) */
if (e->extra[0] != '\0') {
const char *p = e->extra;
const char *nl;
while (*p != '\0') {
nl = strchr(p, '\n');
if (nl != NULL) {
tui_print(" %.*s", (int)(nl - p), p);
p = nl + 1;
} else {
tui_print(" %s", p);
break;
}
}
tui_print("");
}
tui_print("");
}
/* OTP pad status */
if (g_otp_pad_status[0] != '\0') {
tui_print("%s", g_otp_pad_status);
tui_print("");
}
/* Status line */
(void)snprintf(status_buf,
sizeof(status_buf),
"session=%s (%d words) signer=%s derived=%d",
mnemonic_is_loaded(mnemonic) ? "unlocked" : "locked",
(mnemonic != NULL) ? mnemonic->word_count : 0,
(socket_name != NULL) ? socket_name : "(none)",
derived_count);
tui_print("%s", status_buf);
tui_print("");
tui_print("Press any key to return");
tui_anchor_prompt(0, 0);
fflush(stdout);
}
static void render_status(const role_table_t *role_table,
const mnemonic_state_t *mnemonic,
int derived_count,
const char *socket_name) {
TuiFrame frame = { "n_signer", NSIGNER_VERSION, "> Main Menu" };
TuiMenu menu = { g_main_menu_items, (int)(sizeof(g_main_menu_items) / sizeof(g_main_menu_items[0])) };
TuiSize size = tui_terminal_size();
const int left_col = 0;
char status_buf[256];
tui_clear_continuous(size.height);
tui_render_top_frame(&frame, size.width);
tui_print("^*Roles^:");
if (role_table == NULL || role_table->count == 0) {
tui_print("(none)");
} else {
static const TuiColumn columns[] = {
{"Role", 20, 0},
{"Purpose", 12, 0},
{"Curve", 12, 0},
{"Derivation path", 24, 0}
};
role_table_view_data_t view;
TuiTable table;
view.role_table = role_table;
table.columns = columns;
table.column_count = (int)(sizeof(columns) / sizeof(columns[0]));
table.row_count = role_table->count;
table.user_data = &view;
table.get_cell = role_table_get_cell;
table.is_default = NULL;
table.prefix_len = NULL;
tui_render_table(&table);
}
tui_print("");
tui_print("^*Activity (latest first)^:");
if (g_activity_log.count == 0) {
tui_print("(none)");
} else {
int i;
int shown = 0;
for (i = g_activity_log.count - 1; i >= 0 && shown < ACTIVITY_LOG_CAP; --i, ++shown) {
tui_print("%s", g_activity_log.lines[i % ACTIVITY_LOG_CAP]);
}
}
tui_print("");
(void)snprintf(status_buf,
sizeof(status_buf),
"session=%s (%d words) signer=%s derived=%d",
mnemonic_is_loaded(mnemonic) ? "unlocked" : "locked",
(mnemonic != NULL) ? mnemonic->word_count : 0,
(socket_name != NULL) ? socket_name : "(none)",
derived_count);
tui_print("%s", status_buf);
tui_print("");
tui_render_menu(&menu, left_col);
tui_anchor_prompt(0, left_col);
fflush(stdout);
}
static int tui_approval_cb(const server_approval_request_t *req, void *user_data) {
main_tui_context_t *ctx = (main_tui_context_t *)user_data;
TuiFrame frame = { "n_signer", NSIGNER_VERSION, "> Approval" };
char choice[32];
int decision = POLICY_DENY;
tui_render_content_screen(&frame, "Approval required");
tui_print("caller: %s", (req != NULL && req->caller != NULL) ? req->caller->caller_id : "unknown");
if (req != NULL && req->fips_peer_npub != NULL) {
if (req->fips_peer_name != NULL && req->fips_peer_name[0] != '\0') {
tui_print("fips peer: %s (%s)", req->fips_peer_npub, req->fips_peer_name);
} else {
tui_print("fips peer: %s", req->fips_peer_npub);
}
}
tui_print("method: %s", (req != NULL && req->method != NULL) ? req->method : "unknown");
tui_print("role: %s", (req != NULL && req->role_name != NULL) ? req->role_name : "unknown");
tui_print("purpose: %s", (req != NULL && req->purpose != NULL) ? req->purpose : "unknown");
if (req != NULL && req->pending_derivation) {
tui_print("** NEW IDENTITY — will be derived if approved **");
}
tui_print("");
tui_print("^_y^: allow once");
tui_print("^_n^: deny");
tui_print("^_e^: allow this caller+role+verb for session");
tui_print("^_a^: allow this caller+role for session (all verbs)");
printf("> ");
fflush(stdout);
if (read_line_stdin(choice, sizeof(choice)) == 0) {
char ch = (char)tolower((unsigned char)choice[0]);
if (ch == 'a') {
decision = POLICY_ALLOW_SESSION_ALL;
} else if (ch == 'e') {
decision = POLICY_ALLOW_SESSION_VERB;
} else if (ch == 'y') {
decision = POLICY_ALLOW;
}
}
if (ctx != NULL) {
render_status(ctx->role_table,
ctx->mnemonic,
(ctx->derived_count != NULL) ? *ctx->derived_count : 0,
ctx->socket_name);
}
return decision;
}
/*
* Interactive role preset menu wizard.
* Replaces the old blank-template prompt with a preset menu.
* Returns 0 on success (at least one role created), -1 if no roles created or error.
*/
/* Forward declarations for helper functions used by prompt_named_path_roles */
static int parse_path_template_for_role(const char *token,
char *template_out, size_t template_sz,
int *range_lo, int *range_hi,
int *allowed_indices_out, int max_allowed,
int *allowed_count_out);
static role_purpose_t purpose_from_path(const char *path);
/* When the role wizard binds an OTP pad, the pad dir/spec are stored here so
* the later interactive OTP pad prompt (in main()) can be skipped. */
static char g_wizard_otp_dir[256];
static char g_wizard_otp_spec[256];
static int prompt_named_path_roles(role_table_t *role_table) {
char input[256];
int roles_created = 0;
if (role_table == NULL) {
return -1;
}
for (;;) {
tui_render_content_screen(NULL, "Define a role — bind a role name to a derivation path template");
printf("Define a role:\n");
printf(" 1. Standard Nostr (NIP-06): secp256k1, m/44'/1237'/0'/0/0\n");
printf(" 2. Standard Nostr range: secp256k1, m/44'/1237'/*'/0/0\n");
printf(" 3. Nostr agent range (hardened): secp256k1, m/44'/1237'/*'/1'/0'\n");
printf(" 4. SSH role: ed25519, m/44'/102001'/0'/0'/0'\n");
printf(" 5. Age/x25519 role: x25519, m/44'/102002'/0'/0'/0'\n");
printf(" 6. ML-DSA-65 role: post-quantum signatures, m/44'/102003'/0'/0'/0'\n");
printf(" 7. SLH-DSA-128s role: post-quantum signatures, m/44'/102004'/0'/0'/0'\n");
printf(" 8. ML-KEM-768 role: post-quantum KEM, m/44'/102005'/0'/0'/0'\n");
printf(" 9. OTP role (one-time pad encryption)\n");
printf(" 10. Custom path\n");
printf(" Select [1]: ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
return (roles_created > 0) ? 0 : -1;
}
{
size_t len = strlen(input);
while (len > 0 && (input[len-1] == '\n' || input[len-1] == '\r' ||
input[len-1] == ' ' || input[len-1] == '\t')) {
input[--len] = '\0';
}
}
int choice = 1;
if (input[0] != '\0') {
choice = atoi(input);
if (choice < 1 || choice > 10) choice = 1;
}
/* Preset data */
const char *default_name = "main";
const char *default_path = "m/44'/1237'/0'/0/0";
const char *default_curve_str = "secp256k1";
role_purpose_t default_purpose = PURPOSE_NOSTR;
switch (choice) {
case 2:
default_name = "nostr_range";
default_path = "m/44'/1237'/*'/0/0";
break;
case 3:
default_name = "nostr_agent";
default_path = "m/44'/1237'/*'/1'/0'";
break;
case 4:
default_name = "ssh";
default_path = "m/44'/102001'/0'/0'/0'";
default_curve_str = "ed25519";
default_purpose = PURPOSE_SSH;
break;
case 5:
default_name = "age";
default_path = "m/44'/102002'/0'/0'/0'";
default_curve_str = "x25519";
default_purpose = PURPOSE_AGE;
break;
case 6:
default_name = "ml_dsa_65";
default_path = "m/44'/102003'/0'/0'/0'";
default_curve_str = "ml-dsa-65";
default_purpose = PURPOSE_PQ_SIG;
break;
case 7:
default_name = "slh_dsa_128s";
default_path = "m/44'/102004'/0'/0'/0'";
default_curve_str = "slh-dsa-128s";
default_purpose = PURPOSE_PQ_SIG;
break;
case 8:
default_name = "ml_kem_768";
default_path = "m/44'/102005'/0'/0'/0'";
default_curve_str = "ml-kem-768";
default_purpose = PURPOSE_PQ_KEM;
break;
case 9:
/* OTP role — one-time pad encryption, no derivation path */
default_name = "otp";
default_path = "";
default_curve_str = "otp";
default_purpose = PURPOSE_NOSTR; /* not used for OTP */
break;
case 10:
/* Custom — will prompt for all fields */
default_name = "custom";
default_path = "m/44'/1237'/0'/0/0";
default_curve_str = "secp256k1";
default_purpose = PURPOSE_NOSTR;
break;
default:
break;
}
/* Role name */
char role_name[ROLE_NAME_MAX];
{
char prompt_buf[128];
snprintf(prompt_buf, sizeof(prompt_buf), " Role name [%s]: ", default_name);
if (read_line_editable(role_name, sizeof(role_name), default_name, prompt_buf) != 0) {
return (roles_created > 0) ? 0 : -1;
}
}
{
size_t len = strlen(role_name);
while (len > 0 && (role_name[len-1] == '\n' || role_name[len-1] == '\r' ||
role_name[len-1] == ' ' || role_name[len-1] == '\t')) {
role_name[--len] = '\0';
}
}
if (role_name[0] == '\0') {
strncpy(role_name, default_name, sizeof(role_name) - 1);
role_name[sizeof(role_name) - 1] = '\0';
}
if (role_table_find_by_name(role_table, role_name) != NULL) {
printf(" Role '%s' already exists, skipping.\n", role_name);
continue;
}
/* OTP role (choice 9): one-time pad encryption. No curve, no
* derivation path — instead we prompt for and bind the OTP pad. */
if (choice == 9) {
char pad_dir[256];
char pad_spec[256];
printf(" OTP pad directory (e.g. /media/usb0): ");
fflush(stdout);
if (read_line_stdin(pad_dir, sizeof(pad_dir)) != 0) {
return (roles_created > 0) ? 0 : -1;
}
{
size_t len = strlen(pad_dir);
while (len > 0 && (pad_dir[len-1] == '\n' || pad_dir[len-1] == '\r' ||
pad_dir[len-1] == ' ' || pad_dir[len-1] == '\t')) {
pad_dir[--len] = '\0';
}
}
if (pad_dir[0] == '\0') {
printf(" No pad directory entered, skipping OTP role.\n");
continue;
}
printf(" OTP pad name (e.g. mypad): ");
fflush(stdout);
if (read_line_stdin(pad_spec, sizeof(pad_spec)) != 0) {
return (roles_created > 0) ? 0 : -1;
}
{
size_t len = strlen(pad_spec);
while (len > 0 && (pad_spec[len-1] == '\n' || pad_spec[len-1] == '\r' ||
pad_spec[len-1] == ' ' || pad_spec[len-1] == '\t')) {
pad_spec[--len] = '\0';
}
}
if (pad_spec[0] == '\0') {
printf(" No pad name entered, skipping OTP role.\n");
continue;
}
/* Bind the OTP pad immediately. allow_blkback=0 (warn later if needed). */
if (otp_pad_bind(pad_dir, pad_spec, 0) != 0) {
printf(" Failed to bind OTP pad (dir=%s, spec=%s). Skipping role.\n",
pad_dir, pad_spec);
continue;
}
/* Remember the bound pad so the later OTP pad prompt is skipped. */
strncpy(g_wizard_otp_dir, pad_dir, sizeof(g_wizard_otp_dir) - 1);
g_wizard_otp_dir[sizeof(g_wizard_otp_dir) - 1] = '\0';
strncpy(g_wizard_otp_spec, pad_spec, sizeof(g_wizard_otp_spec) - 1);
g_wizard_otp_spec[sizeof(g_wizard_otp_spec) - 1] = '\0';
/* requires_approval flag — OTP roles can still require approval. */
printf(" Require interactive approval for each request? [Y/n]: ");
fflush(stdout);
char approval_choice[16];
if (read_line_stdin(approval_choice, sizeof(approval_choice)) != 0) {
return (roles_created > 0) ? 0 : -1;
}
{
size_t len = strlen(approval_choice);
while (len > 0 && (approval_choice[len-1] == '\n' || approval_choice[len-1] == '\r' ||
approval_choice[len-1] == ' ' || approval_choice[len-1] == '\t')) {
approval_choice[--len] = '\0';
}
}
int requires_approval = 1;
if (approval_choice[0] == 'n' || approval_choice[0] == 'N') {
requires_approval = 0;
}
/* Register the OTP role. No curve/path derivation; the pad is the key. */
role_entry_t new_role;
memset(&new_role, 0, sizeof(new_role));
strncpy(new_role.name, role_name, sizeof(new_role.name) - 1);
new_role.name[sizeof(new_role.name) - 1] = '\0';
/* OTP is identified by the "otp" algorithm string. */
strncpy(new_role.purpose_str, "nostr", sizeof(new_role.purpose_str) - 1);
new_role.purpose_str[sizeof(new_role.purpose_str) - 1] = '\0';
strncpy(new_role.curve_str, "otp", sizeof(new_role.curve_str) - 1);
new_role.curve_str[sizeof(new_role.curve_str) - 1] = '\0';
new_role.purpose = PURPOSE_NOSTR; /* not used for OTP */
new_role.curve = CURVE_UNKNOWN; /* OTP has no curve */
new_role.selector_type = SELECTOR_ROLE_PATH;
new_role.role_path[0] = '\0'; /* OTP doesn't use a path */
new_role.nostr_index = -1;
new_role.path_range_lo = -1;
new_role.path_range_hi = -1;
new_role.path_default_index = -1;
new_role.requires_approval = requires_approval;
new_role.path_allowed_count = 0;
new_role.derived = 0;
if (role_table_add(role_table, &new_role) != 0) {
printf(" Failed to register role '%s' (table full or duplicate).\n",
role_name);
} else {
roles_created++;
printf(" Role '%s' registered: OTP pad bound (pad=%s, dir=%s, requires_approval=%d).\n",
role_name, pad_spec, pad_dir, requires_approval);
}
/* Ask if user wants to define another role */
printf("Define another role? [y/N]: ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
break;
}
if (tolower((unsigned char)input[0]) != 'y') {
break;
}
continue;
}
/* For custom path (choice 10), let user pick curve first, then path */
role_curve_t curve;
role_purpose_t purpose;
if (choice == 10) {
printf(" Curve:\n");
printf(" 1) secp256k1 (Nostr, Bitcoin)\n");
printf(" 2) ed25519 (SSH)\n");
printf(" 3) x25519 (key agreement, Age)\n");
printf(" 4) ml-dsa-65 (post-quantum signatures)\n");
printf(" 5) slh-dsa-128s (post-quantum signatures)\n");
printf(" 6) ml-kem-768 (post-quantum KEM)\n");
printf(" Select [1]: ");
fflush(stdout);
char curve_choice[16];
if (read_line_stdin(curve_choice, sizeof(curve_choice)) != 0) {
return (roles_created > 0) ? 0 : -1;
}
{
size_t len = strlen(curve_choice);
while (len > 0 && (curve_choice[len-1] == '\n' || curve_choice[len-1] == '\r' ||
curve_choice[len-1] == ' ' || curve_choice[len-1] == '\t')) {
curve_choice[--len] = '\0';
}
}
int cchoice = 1;
if (curve_choice[0] != '\0') {
cchoice = atoi(curve_choice);
if (cchoice < 1 || cchoice > 6) cchoice = 1;
}
switch (cchoice) {
case 2: curve = CURVE_ED25519; default_path = "m/44'/102001'/0'/0'/0'"; break;
case 3: curve = CURVE_X25519; default_path = "m/44'/102002'/0'/0'/0'"; break;
case 4: curve = CURVE_ML_DSA_65; default_path = "m/44'/102003'/0'/0'/0'"; break;
case 5: curve = CURVE_SLH_DSA_128S; default_path = "m/44'/102004'/0'/0'/0'"; break;
case 6: curve = CURVE_ML_KEM_768; default_path = "m/44'/102005'/0'/0'/0'"; break;
default: curve = CURVE_SECP256K1; break;
}
} else {
curve = role_curve_from_str(default_curve_str);
purpose = default_purpose;
}
/* Path template — only prompt for custom path; presets use the default */
char path_token[ROLE_PATH_MAX];
if (choice == 10) {
{
char prompt_buf[256];
snprintf(prompt_buf, sizeof(prompt_buf), " Path template [%s]: ", default_path);
if (read_line_editable(path_token, sizeof(path_token), default_path, prompt_buf) != 0) {
return (roles_created > 0) ? 0 : -1;
}
}
{
size_t len = strlen(path_token);
while (len > 0 && (path_token[len-1] == '\n' || path_token[len-1] == '\r' ||
path_token[len-1] == ' ' || path_token[len-1] == '\t')) {
path_token[--len] = '\0';
}
}
if (path_token[0] == '\0') {
strncpy(path_token, default_path, sizeof(path_token) - 1);
path_token[sizeof(path_token) - 1] = '\0';
}
purpose = purpose_from_path(path_token);
} else {
strncpy(path_token, default_path, sizeof(path_token) - 1);
path_token[sizeof(path_token) - 1] = '\0';
}
/* Parse the path template */
char template[ROLE_PATH_MAX];
int range_lo, range_hi;
int allowed_indices[64];
int allowed_count = 0;
if (parse_path_template_for_role(path_token, template, sizeof(template),
&range_lo, &range_hi,
allowed_indices, 64, &allowed_count) != 0) {
printf(" Invalid path template: '%s'.\n", path_token);
continue;
}
/* Validate purpose+curve combination (skip for custom paths — the user
* can combine any curve with any path) */
if (choice != 10 && choice != 9 && crypto_alg_from_role(curve, purpose) == CRYPTO_ALG_UNKNOWN) {
printf(" Curve %s is not valid for this path prefix. Try a different curve.\n",
role_curve_to_str(curve));
continue;
}
/* requires_approval flag */
printf(" Require interactive approval for each request? [Y/n]: ");
fflush(stdout);
char approval_choice[16];
if (read_line_stdin(approval_choice, sizeof(approval_choice)) != 0) {
return (roles_created > 0) ? 0 : -1;
}
{
size_t len = strlen(approval_choice);
while (len > 0 && (approval_choice[len-1] == '\n' || approval_choice[len-1] == '\r' ||
approval_choice[len-1] == ' ' || approval_choice[len-1] == '\t')) {
approval_choice[--len] = '\0';
}
}
int requires_approval = 1; /* default: require approval */
if (approval_choice[0] == 'n' || approval_choice[0] == 'N') {
requires_approval = 0;
}
/* No default index — the client always sends the full path, so keys
* are derived on-demand when a request comes in. */
int default_index = -1;
int is_fixed = (range_lo < 0);
/* Register the role */
role_entry_t new_role;
memset(&new_role, 0, sizeof(new_role));
strncpy(new_role.name, role_name, sizeof(new_role.name) - 1);
new_role.name[sizeof(new_role.name) - 1] = '\0';
strncpy(new_role.purpose_str, role_purpose_to_str(purpose), sizeof(new_role.purpose_str) - 1);
new_role.purpose_str[sizeof(new_role.purpose_str) - 1] = '\0';
strncpy(new_role.curve_str, role_curve_to_str(curve), sizeof(new_role.curve_str) - 1);
new_role.curve_str[sizeof(new_role.curve_str) - 1] = '\0';
new_role.purpose = purpose;
new_role.curve = curve;
new_role.selector_type = SELECTOR_ROLE_PATH;
strncpy(new_role.role_path, template, sizeof(new_role.role_path) - 1);
new_role.role_path[sizeof(new_role.role_path) - 1] = '\0';
new_role.nostr_index = -1;
new_role.path_range_lo = range_lo;
new_role.path_range_hi = range_hi;
new_role.path_default_index = default_index;
new_role.requires_approval = requires_approval;
if (allowed_count > 0) {
int copy_n = allowed_count;
if (copy_n > (int)(sizeof(new_role.path_allowed_indices) / sizeof(new_role.path_allowed_indices[0]))) {
copy_n = (int)(sizeof(new_role.path_allowed_indices) / sizeof(new_role.path_allowed_indices[0]));
}
memcpy(new_role.path_allowed_indices, allowed_indices, (size_t)copy_n * sizeof(int));
new_role.path_allowed_count = copy_n;
} else {
new_role.path_allowed_count = 0;
}
new_role.derived = 0;
if (role_table_add(role_table, &new_role) != 0) {
printf(" Failed to register role '%s' (table full or duplicate).\n", role_name);
} else {
roles_created++;
if (is_fixed) {
printf(" Role '%s' registered: curve=%s path=%s (fixed, requires_approval=%d).\n",
role_name, role_curve_to_str(curve), template, requires_approval);
} else {
printf(" Role '%s' registered: curve=%s path=%s (range %d-%d, requires_approval=%d).\n",
role_name, role_curve_to_str(curve), template, range_lo, range_hi, requires_approval);
}
}
/* Ask if user wants to define another role */
printf("Define another role? [y/N]: ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
break;
}
if (tolower((unsigned char)input[0]) != 'y') {
break;
}
}
/* Mandatory: at least one role must be defined */
if (roles_created == 0) {
printf("At least one role must be defined.\n");
return -1;
}
return 0;
}
/*
* Parse a path template token (e.g. "m/44'/1237'/0-3/1/0" or
* "m/44'/1237'/1+34+54/1/0") into a template with %d placeholder and
* allowed indices. Returns 0 on success, -1 on parse error.
*
* On success:
* template_out — the path with %d replacing the numeric/range/set segment
* range_lo/range_hi — set to the min/max of the allowed indices
* allowed_indices_out / allowed_count_out — the explicit set (if set form
* was used); allowed_count_out is 0 for pure range/single form
*/
static int parse_path_template_for_role(const char *token,
char *template_out, size_t template_sz,
int *range_lo, int *range_hi,
int *allowed_indices_out, int max_allowed,
int *allowed_count_out) {
char buf[ROLE_PATH_MAX];
char *p;
int found_range = 0;
if (token == NULL || template_out == NULL || range_lo == NULL || range_hi == NULL ||
allowed_indices_out == NULL || allowed_count_out == NULL) {
return -1;
}
strncpy(buf, token, sizeof(buf) - 1);
buf[sizeof(buf) - 1] = '\0';
*range_lo = 0;
*range_hi = 0;
*allowed_count_out = 0;
template_out[0] = '\0';
p = buf;
/* Copy up to and including the first '/' */
{
char *first_slash = strchr(p, '/');
if (first_slash == NULL) {
return -1;
}
size_t prefix_len = (size_t)(first_slash - p) + 1;
if (prefix_len >= template_sz) {
return -1;
}
memcpy(template_out, p, prefix_len);
template_out[prefix_len] = '\0';
p = first_slash + 1;
}
while (p != NULL && *p != '\0') {
char *next_slash = strchr(p, '/');
char seg[64];
size_t seg_len;
if (next_slash != NULL) {
seg_len = (size_t)(next_slash - p);
} else {
seg_len = strlen(p);
}
if (seg_len == 0 || seg_len >= sizeof(seg)) {
return -1;
}
memcpy(seg, p, seg_len);
seg[seg_len] = '\0';
if (!found_range) {
/* Check for wildcard * (any non-negative integer) */
if (strcmp(seg, "*") == 0 || strcmp(seg, "*'") == 0 ||
strcmp(seg, "*h") == 0 || strcmp(seg, "*H") == 0) {
int seg_hardened = (seg[1] == '\'' || seg[1] == 'h' || seg[1] == 'H');
found_range = 1;
*range_lo = 0;
*range_hi = INT_MAX;
if (strlen(template_out) + 5 >= template_sz) return -1;
strcat(template_out, "%d");
if (seg_hardened) strcat(template_out, "'");
strcat(template_out, "/");
p = (next_slash != NULL) ? next_slash + 1 : NULL;
continue;
}
/* Check for range/set markers first. Only strip hardened marker
* (' or h) from segments that contain - or + (range/set forms).
* A plain number with ' (like 44') is a literal hardened constant,
* NOT a variable. */
char *plus = strchr(seg, '+');
char *dash = strchr(seg, '-');
int is_range_or_set = (plus != NULL || dash != NULL);
int seg_hardened = 0;
if (is_range_or_set && seg_len > 0 &&
(seg[seg_len - 1] == '\'' || seg[seg_len - 1] == 'h' || seg[seg_len - 1] == 'H')) {
seg_hardened = 1;
seg[seg_len - 1] = '\0';
seg_len--;
}
if (plus != NULL) {
/* Set form: "1+34+54" or "1+3-5+10" */
int set_count = 0;
char *tok = seg;
int set_ok = 1;
while (tok != NULL && *tok != '\0') {
char *next_plus = strchr(tok, '+');
if (next_plus != NULL) *next_plus = '\0';
char *sub_dash = strchr(tok, '-');
if (sub_dash != NULL) {
*sub_dash = '\0';
char *e1 = NULL, *e2 = NULL;
long lo = strtol(tok, &e1, 10);
long hi = strtol(sub_dash + 1, &e2, 10);
if (*e1 != '\0' || *e2 != '\0' || lo < 0 || hi < 0 || lo > hi) {
set_ok = 0; break;
}
for (long vi = lo; vi <= hi && set_count < max_allowed; vi++) {
allowed_indices_out[set_count++] = (int)vi;
}
} else {
char *e = NULL;
long val = strtol(tok, &e, 10);
if (*e != '\0' || val < 0) { set_ok = 0; break; }
if (set_count < max_allowed) {
allowed_indices_out[set_count++] = (int)val;
}
}
tok = (next_plus != NULL) ? next_plus + 1 : NULL;
}
if (set_ok && set_count > 0) {
found_range = 1;
*allowed_count_out = set_count;
*range_lo = allowed_indices_out[0];
*range_hi = allowed_indices_out[set_count - 1];
if (strlen(template_out) + 5 >= template_sz) return -1;
strcat(template_out, "%d");
if (seg_hardened) strcat(template_out, "'");
strcat(template_out, "/");
} else {
if (strlen(template_out) + seg_len + 3 >= template_sz) return -1;
strcat(template_out, seg);
strcat(template_out, "/");
}
} else if (dash != NULL) {
/* Range form: "N-M" */
*dash = '\0';
char *e1 = NULL, *e2 = NULL;
long lo = strtol(seg, &e1, 10);
long hi = strtol(dash + 1, &e2, 10);
if (*e1 != '\0' || *e2 != '\0' || lo < 0 || hi < 0 || lo > hi) {
*dash = '-'; /* restore dash */
if (strlen(template_out) + seg_len + 3 >= template_sz) return -1;
strcat(template_out, seg);
strcat(template_out, "/");
} else {
found_range = 1;
*range_lo = (int)lo;
*range_hi = (int)hi;
if (strlen(template_out) + 5 >= template_sz) return -1;
strcat(template_out, "%d");
if (seg_hardened) strcat(template_out, "'");
strcat(template_out, "/");
}
} else {
/* Single number — only treat as variable if NO hardened marker.
* A segment like "44'" is a literal hardened constant. */
char *e = NULL;
long v = strtol(seg, &e, 10);
if (*e != '\0' || v < 0) {
/* Not a plain number (has ' or other chars) — literal */
if (strlen(template_out) + seg_len + 3 >= template_sz) return -1;
strcat(template_out, seg);
strcat(template_out, "/");
} else {
/* Plain number without ' — this is the variable */
found_range = 1;
*range_lo = (int)v;
*range_hi = (int)v;
if (strlen(template_out) + 5 >= template_sz) return -1;
strcat(template_out, "%d");
strcat(template_out, "/");
}
}
} else {
if (strlen(template_out) + seg_len + 2 >= template_sz) return -1;
strcat(template_out, seg);
strcat(template_out, "/");
}
p = (next_slash != NULL) ? next_slash + 1 : NULL;
}
/* Remove trailing '/' */
{
size_t tlen = strlen(template_out);
if (tlen > 0 && template_out[tlen - 1] == '/') {
template_out[tlen - 1] = '\0';
}
}
if (!found_range) {
/* Fixed path — no variable segment. Treat as a single fixed key. */
*range_lo = -1;
*range_hi = -1;
*allowed_count_out = 0;
}
return 0;
}
/*
* Auto-detect purpose from a derivation path prefix.
* m/44'/1237' → nostr, m/44'/102001' → ssh, etc.
* Falls back to PURPOSE_NOSTR for unrecognized prefixes.
*/
static role_purpose_t purpose_from_path(const char *path) {
if (path == NULL) return PURPOSE_NOSTR;
if (strncmp(path, "m/44'/1237'", 11) == 0) return PURPOSE_NOSTR;
if (strncmp(path, "m/44'/102001'", 13) == 0) return PURPOSE_SSH;
if (strncmp(path, "m/44'/102002'", 13) == 0) return PURPOSE_AGE;
if (strncmp(path, "m/44'/102003'", 13) == 0) return PURPOSE_PQ_SIG;
if (strncmp(path, "m/44'/102004'", 13) == 0) return PURPOSE_PQ_SIG;
if (strncmp(path, "m/44'/102005'", 13) == 0) return PURPOSE_PQ_KEM;
if (strncmp(path, "m/84'", 4) == 0) return PURPOSE_BITCOIN;
if (strncmp(path, "m/86'", 4) == 0) return PURPOSE_BITCOIN;
return PURPOSE_NOSTR; /* default */
}
/*
* Parse a --register-role spec of the form:
* <name>:<curve>:<path-template>
* and register it into the role table. The curve field may be empty
* (e.g. "name::path") in which case the curve is auto-detected from the
* path prefix via purpose_from_path + the default curve for that purpose.
*
* The path-template uses the same syntax as the TUI wizard:
* - Wildcard: * or *' (any non-negative integer)
* - Range: 0-99 or 0-99' (inclusive range)
* - Set: 1+3+5 or 1+3-5+10
* - Fixed: a literal path with no variable segment
*
* Returns 0 on success, -1 on parse error.
*/
static int register_role_from_spec(role_table_t *role_table, const char *spec) {
char buf[512];
char *name, *curve_str, *path_token;
role_curve_t curve;
role_purpose_t purpose;
char template[ROLE_PATH_MAX];
int range_lo, range_hi;
int allowed_indices[64];
int allowed_count = 0;
role_entry_t new_role;
if (role_table == NULL || spec == NULL) {
return -1;
}
strncpy(buf, spec, sizeof(buf) - 1);
buf[sizeof(buf) - 1] = '\0';
/* Split on ':' — name:curve:path-template */
name = buf;
curve_str = strchr(buf, ':');
if (curve_str == NULL) {
fprintf(stderr, "--register-role: missing ':' separator in '%s'\n", spec);
return -1;
}
*curve_str = '\0';
curve_str++;
path_token = strchr(curve_str, ':');
if (path_token == NULL) {
fprintf(stderr, "--register-role: missing path template in '%s' (expected name:curve:path)\n", spec);
return -1;
}
*path_token = '\0';
path_token++;
if (name[0] == '\0') {
fprintf(stderr, "--register-role: empty role name in '%s'\n", spec);
return -1;
}
if (path_token[0] == '\0') {
fprintf(stderr, "--register-role: empty path template in '%s'\n", spec);
return -1;
}
/* Resolve curve: empty string → auto-detect from path */
if (curve_str[0] == '\0') {
purpose = purpose_from_path(path_token);
/* Default curve per purpose */
switch (purpose) {
case PURPOSE_SSH: curve = CURVE_ED25519; break;
case PURPOSE_AGE: curve = CURVE_X25519; break;
case PURPOSE_PQ_SIG:
/* 102003 → ml-dsa-65, 102004 → slh-dsa-128s */
if (strncmp(path_token, "m/44'/102004'", 13) == 0) {
curve = CURVE_SLH_DSA_128S;
} else {
curve = CURVE_ML_DSA_65;
}
break;
case PURPOSE_PQ_KEM: curve = CURVE_ML_KEM_768; break;
default: curve = CURVE_SECP256K1; break;
}
} else {
curve = role_curve_from_str(curve_str);
if (curve == CURVE_UNKNOWN) {
fprintf(stderr, "--register-role: unknown curve '%s' in '%s'\n", curve_str, spec);
return -1;
}
purpose = purpose_from_path(path_token);
}
/* Parse the path template (wildcard/range/set → %d) */
if (parse_path_template_for_role(path_token, template, sizeof(template),
&range_lo, &range_hi,
allowed_indices, 64, &allowed_count) != 0) {
fprintf(stderr, "--register-role: invalid path template '%s'\n", path_token);
return -1;
}
/* Validate purpose+curve combination */
if (crypto_alg_from_role(curve, purpose) == CRYPTO_ALG_UNKNOWN) {
fprintf(stderr, "--register-role: curve '%s' is not valid for path '%s'\n",
role_curve_to_str(curve), path_token);
return -1;
}
/* Register the role (no approval required in non-interactive mode) */
memset(&new_role, 0, sizeof(new_role));
strncpy(new_role.name, name, sizeof(new_role.name) - 1);
new_role.name[sizeof(new_role.name) - 1] = '\0';
strncpy(new_role.purpose_str, role_purpose_to_str(purpose), sizeof(new_role.purpose_str) - 1);
new_role.purpose_str[sizeof(new_role.purpose_str) - 1] = '\0';
strncpy(new_role.curve_str, role_curve_to_str(curve), sizeof(new_role.curve_str) - 1);
new_role.curve_str[sizeof(new_role.curve_str) - 1] = '\0';
new_role.purpose = purpose;
new_role.curve = curve;
new_role.selector_type = SELECTOR_ROLE_PATH;
strncpy(new_role.role_path, template, sizeof(new_role.role_path) - 1);
new_role.role_path[sizeof(new_role.role_path) - 1] = '\0';
new_role.nostr_index = -1;
new_role.path_range_lo = range_lo;
new_role.path_range_hi = range_hi;
new_role.path_default_index = -1;
new_role.requires_approval = 0; /* non-interactive: no TUI approval */
if (allowed_count > 0) {
int copy_n = allowed_count;
if (copy_n > (int)(sizeof(new_role.path_allowed_indices) / sizeof(new_role.path_allowed_indices[0]))) {
copy_n = (int)(sizeof(new_role.path_allowed_indices) / sizeof(new_role.path_allowed_indices[0]));
}
memcpy(new_role.path_allowed_indices, allowed_indices, (size_t)copy_n * sizeof(int));
new_role.path_allowed_count = copy_n;
} else {
new_role.path_allowed_count = 0;
}
new_role.derived = 0;
if (role_table_add(role_table, &new_role) != 0) {
fprintf(stderr, "--register-role: failed to register role '%s' (table full or duplicate name)\n", name);
return -1;
}
return 0;
}
static int prompt_load_mnemonic_tui(mnemonic_state_t *mnemonic) {
char phrase[MNEMONIC_MAX_LEN];
char phrase_copy[MNEMONIC_MAX_LEN];
char mode[MNEMONIC_MAX_LEN];
int invalid_attempts = 0;
const int max_invalid_attempts = 10;
if (mnemonic == NULL) {
return -1;
}
while (invalid_attempts < max_invalid_attempts) {
{
TuiFrame frame = { "n_signer", NSIGNER_VERSION, "> Unlock" };
tui_render_content_screen(&frame, "Load mnemonic");
tui_print("Mnemonic source: [E]nter existing or [G]enerate new");
tui_print("Default is E; you can also paste full mnemonic here.");
printf("> ");
fflush(stdout);
}
if (read_line_stdin(mode, sizeof(mode)) != 0) {
fprintf(stderr, "Failed to read mnemonic source choice\n");
return -1;
}
if ((mode[0] == 'q' || mode[0] == 'Q' || mode[0] == 'x' || mode[0] == 'X') && mode[1] == '\0') {
fprintf(stderr, "User requested exit.\n");
return -1;
}
if (strchr(mode, ' ') != NULL && mode[0] != 'g' && mode[0] != 'G') {
if (mnemonic_load(mnemonic, mode) == 0) {
printf("Seed phrase is valid and accepted.\n");
return 0;
}
invalid_attempts++;
fprintf(stderr,
"Invalid mnemonic (must be 12/15/18/21/24 words). Attempts: %d/%d\n",
invalid_attempts,
max_invalid_attempts);
continue;
}
if (mode[0] == 'g' || mode[0] == 'G') {
int idx = 1;
char *ctx = NULL;
char *word;
if (mnemonic_generate(12, phrase, sizeof(phrase)) != 0) {
fprintf(stderr, "Failed to generate mnemonic\n");
return -1;
}
strncpy(phrase_copy, phrase, sizeof(phrase_copy) - 1);
phrase_copy[sizeof(phrase_copy) - 1] = '\0';
tui_print("");
tui_print("Generated mnemonic (WRITE THIS DOWN - it will not be shown again):");
word = strtok_r(phrase_copy, " ", &ctx);
while (word != NULL) {
printf("%2d. %s\n", idx, word);
idx++;
word = strtok_r(NULL, " ", &ctx);
}
tui_print("");
tui_print("Press Enter after writing down your mnemonic to continue.");
printf("> ");
fflush(stdout);
if (read_line_stdin(mode, sizeof(mode)) != 0) {
fprintf(stderr, "Failed to read continue input\n");
memset(phrase, 0, sizeof(phrase));
memset(phrase_copy, 0, sizeof(phrase_copy));
return -1;
}
if (mnemonic_load(mnemonic, phrase) != 0) {
memset(phrase, 0, sizeof(phrase));
memset(phrase_copy, 0, sizeof(phrase_copy));
fprintf(stderr, "Failed to load generated mnemonic\n");
return -1;
}
printf("Seed phrase is valid and accepted.\n");
memset(phrase, 0, sizeof(phrase));
memset(phrase_copy, 0, sizeof(phrase_copy));
return 0;
}
{
TuiFrame frame = { "n_signer", NSIGNER_VERSION, "> Unlock" };
tui_render_content_screen(&frame, "Enter mnemonic");
tui_print("Enter mnemonic (12/15/18/21/24 words):");
printf("> ");
fflush(stdout);
}
if (read_line_stdin(phrase, sizeof(phrase)) != 0) {
fprintf(stderr, "Failed to read mnemonic\n");
return -1;
}
if ((phrase[0] == 'q' || phrase[0] == 'Q' || phrase[0] == 'x' || phrase[0] == 'X') && phrase[1] == '\0') {
memset(phrase, 0, sizeof(phrase));
fprintf(stderr, "User requested exit.\n");
return -1;
}
if (mnemonic_load(mnemonic, phrase) == 0) {
printf("Seed phrase is valid and accepted.\n");
memset(phrase, 0, sizeof(phrase));
return 0;
}
memset(phrase, 0, sizeof(phrase));
invalid_attempts++;
fprintf(stderr,
"Invalid mnemonic (must be 12/15/18/21/24 words). Attempts: %d/%d\n",
invalid_attempts,
max_invalid_attempts);
}
fprintf(stderr, "Too many invalid mnemonic attempts (%d). Exiting.\n", max_invalid_attempts);
return -1;
}
static int read_mnemonic_from_fd(int fd, char *out, size_t out_sz) {
size_t len = 0;
int saw_newline = 0;
if (fd < 0 || out == NULL || out_sz < 2) {
return -1;
}
for (;;) {
unsigned char ch;
ssize_t n = read(fd, &ch, 1);
if (n == 0) {
break;
}
if (n < 0) {
if (errno == EINTR) {
continue;
}
return -1;
}
if (ch == '\n') {
saw_newline = 1;
break;
}
if (ch == '\0') {
return -2;
}
if (len + 1 >= out_sz) {
return -3;
}
out[len++] = (char)ch;
}
out[len] = '\0';
if (len > 0 && out[len - 1] == '\r') {
out[len - 1] = '\0';
}
(void)saw_newline;
return 0;
}
static int replace_stdin_with_devnull(void) {
int null_fd = open("/dev/null", O_RDONLY);
int rc = 0;
if (null_fd < 0) {
return -1;
}
if (dup2(null_fd, STDIN_FILENO) < 0) {
rc = -1;
}
close(null_fd);
return rc;
}
static int load_mnemonic(mnemonic_state_t *mnemonic, const mnemonic_source_t *source) {
char phrase[MNEMONIC_MAX_LEN];
int rc = -1;
if (mnemonic == NULL || source == NULL) {
return -1;
}
if (source->kind == MNEMONIC_SOURCE_TUI) {
return prompt_load_mnemonic_tui(mnemonic);
}
memset(phrase, 0, sizeof(phrase));
rc = read_mnemonic_from_fd(source->fd, phrase, sizeof(phrase));
if (rc != 0) {
if (rc == -2) {
fprintf(stderr, "nsigner: mnemonic input contains embedded NUL byte\n");
} else if (rc == -3) {
fprintf(stderr, "nsigner: mnemonic input exceeded maximum length\n");
} else {
fprintf(stderr, "nsigner: failed to read mnemonic from fd %d: %s\n", source->fd, strerror(errno));
}
if (source->fd >= 0) {
close(source->fd);
}
secure_memzero(phrase, sizeof(phrase));
return -1;
}
rc = mnemonic_load(mnemonic, phrase);
secure_memzero(phrase, sizeof(phrase));
if (source->fd >= 0) {
close(source->fd);
}
if (rc != 0) {
fprintf(stderr, "nsigner: mnemonic validation failed\n");
return -1;
}
if (source->kind == MNEMONIC_SOURCE_STDIN || source->fd == STDIN_FILENO) {
if (replace_stdin_with_devnull() != 0) {
fprintf(stderr, "nsigner: failed to rebind stdin to /dev/null: %s\n", strerror(errno));
mnemonic_unload(mnemonic);
return -1;
}
}
printf("Seed phrase is valid and accepted.\n");
return 0;
}
static void apply_test_overrides(policy_table_t *policy) {
const char *force_prompt;
const char *noninteractive_prompt;
const char *hotkeys;
if (policy == NULL) {
return;
}
force_prompt = getenv("NSIGNER_TEST_FORCE_PROMPT");
if (force_prompt != NULL && strcmp(force_prompt, "1") == 0) {
policy_entry_t e;
uid_t uid = getuid();
memset(&e, 0, sizeof(e));
(void)snprintf(e.caller, sizeof(e.caller), "uid:%u", (unsigned int)uid);
e.prompt = PROMPT_EVERY_REQUEST;
(void)policy_table_add(policy, &e);
}
noninteractive_prompt = getenv("NSIGNER_TEST_NONINTERACTIVE_PROMPT");
if (noninteractive_prompt != NULL) {
if (strcasecmp(noninteractive_prompt, "allow") == 0) {
server_set_noninteractive_prompt_default(POLICY_ALLOW);
} else if (strcasecmp(noninteractive_prompt, "deny") == 0) {
server_set_noninteractive_prompt_default(POLICY_DENY);
}
}
/* NSIGNER_TEST_HOTKEYS previously toggled g_auto_approve via the 'a' key.
* The auto-approve TUI toggle has been removed (authorization is now
* per-role via requires_approval). The env var is retained as a no-op
* so existing test harnesses that set it do not break. */
(void)getenv("NSIGNER_TEST_HOTKEYS");
}
/* Transport selection bitmask for interactive menu */
#define TRANSPORT_UNIX 0x01
#define TRANSPORT_QREXEC_BRIDGE 0x02
#define TRANSPORT_TCP 0x04
#define TRANSPORT_HTTP 0x08
#define TRANSPORT_QREXEC_ONESHOT 0x10
/*
* Interactive transport selection menu.
* Shown after mnemonic entry when no --listen flag was given and stdin is a TTY.
* Returns a bitmask of selected transports, or 0 on error/no selection.
*/
static int prompt_transport_selection(void) {
int selected = TRANSPORT_UNIX; /* default: local unix socket */
char input[32];
for (;;) {
tui_render_content_screen(NULL, "Transport — how should other programs reach this signer?");
printf("Select one or more (type a number to toggle, 'a' for all, Enter to confirm):\n\n");
printf(" [%s] 1. Local Unix socket (same machine/qube)\n",
(selected & TRANSPORT_UNIX) ? "x" : " ");
printf(" [%s] 2. Qubes qrexec bridge (other qubes via qrexec, no network)\n",
(selected & TRANSPORT_QREXEC_BRIDGE) ? "x" : " ");
printf(" [%s] 3. FIPS/TCP listener (framed JSON, FIPS mesh or local network)\n",
(selected & TRANSPORT_TCP) ? "x" : " ");
printf(" [%s] 4. HTTP listener (curl-friendly, localhost by default)\n",
(selected & TRANSPORT_HTTP) ? "x" : " ");
printf("\n [a] select all Enter = confirm\n");
printf("> ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
return 0;
}
/* Trim trailing whitespace */
{
size_t len = strlen(input);
while (len > 0 && (input[len-1] == '\n' || input[len-1] == '\r' ||
input[len-1] == ' ' || input[len-1] == '\t')) {
input[--len] = '\0';
}
}
if (input[0] == '\0') {
/* Enter pressed — confirm current selection */
if (selected == 0) {
printf("At least one transport must be selected.\n");
continue;
}
break;
}
if (input[0] == 'a' || input[0] == 'A') {
selected = TRANSPORT_UNIX | TRANSPORT_QREXEC_BRIDGE | TRANSPORT_TCP | TRANSPORT_HTTP;
continue;
}
if (input[0] == '1') {
selected ^= TRANSPORT_UNIX;
} else if (input[0] == '2') {
selected ^= TRANSPORT_QREXEC_BRIDGE;
} else if (input[0] == '3') {
selected ^= TRANSPORT_TCP;
} else if (input[0] == '4') {
selected ^= TRANSPORT_HTTP;
} else {
printf("Invalid input. Type 1-4, 'a', or Enter to confirm.\n");
}
}
return selected;
}
/*
* Interactive index whitelist prompt.
* Shown after transport selection when no --allow-index flag was given.
* Returns a malloc'd spec string (caller must free), or NULL for "all".
*/
static char *prompt_index_whitelist(void) {
char input[256];
for (;;) {
tui_render_content_screen(NULL, "Whitelist — restrict which nostr_index / role_path values this session can access");
printf("Enter allowed indices/paths, or press Enter for 'all' (no restriction):\n\n");
printf(" Examples:\n");
printf(" all (default — allow all)\n");
printf(" 0 (only nostr_index 0)\n");
printf(" 0-3 (nostr_index 0..3)\n");
printf(" m/44'/1237'/0-3/0/0 (NIP-06 paths X=0..3)\n");
printf(" m/44'/1237'/0-3/1/0 (custom paths X=0..3, change=1)\n");
printf(" m/44'/1237'/0-3/0/0,m/44'/1237'/0-3/1/0 (both)\n");
printf("\n Enter = all\n");
printf("> ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
return NULL;
}
/* Trim trailing whitespace */
{
size_t len = strlen(input);
while (len > 0 && (input[len-1] == '\n' || input[len-1] == '\r' ||
input[len-1] == ' ' || input[len-1] == '\t')) {
input[--len] = '\0';
}
}
if (input[0] == '\0') {
/* Enter pressed — default to "all" */
return NULL;
}
/* Validate by parsing into a temp whitelist */
{
server_ctx_t tmp;
memset(&tmp, 0, sizeof(tmp));
if (server_set_path_whitelist(&tmp, input) != 0) {
printf("Invalid spec: '%s'. Try again or press Enter for 'all'.\n", input);
continue;
}
}
return strdup(input);
}
}
/*
* Scan for OTP pads on mounted USB drives.
*
* Looks at /proc/mounts for mounts whose source device is /dev/sd* (USB mass
* storage), then checks each mount point for a "pads/" subdirectory containing
* .pad files. Also checks the mount point root itself for .pad files.
*
* Fills `out_dirs` (array of malloc'd pad-directory paths) and `out_pads`
* (array of malloc'd pad chksum strings) up to max_entries. Returns the count
* found, or 0 if none.
*/
#define OTP_SCAN_MAX 16
static int scan_usb_pads(char *out_dirs[][OTP_SCAN_MAX],
char *out_pads[][OTP_SCAN_MAX]) {
FILE *mtab = fopen("/proc/mounts", "r");
if (!mtab) return 0;
char line[1024];
int count = 0;
while (fgets(line, sizeof(line), mtab) && count < OTP_SCAN_MAX) {
char source[512], mount[512], fstype[64];
if (sscanf(line, "%511s %511s %63s", source, mount, fstype) < 3) continue;
/* Only look at /dev/sd* devices (USB mass storage). */
if (strncmp(source, "/dev/sd", 7) != 0) continue;
/* Check <mount>/pads/ for .pad files, and also the mount root. */
const char *subdirs[] = {"pads", "" /* root */, NULL};
for (int s = 0; subdirs[s] != NULL && count < OTP_SCAN_MAX; s++) {
char dir[600];
if (subdirs[s][0] == '\0') {
snprintf(dir, sizeof(dir), "%s", mount);
} else {
snprintf(dir, sizeof(dir), "%s/%s", mount, subdirs[s]);
}
DIR *d = opendir(dir);
if (!d) continue;
struct dirent *e;
while ((e = readdir(d)) != NULL && count < OTP_SCAN_MAX) {
size_t nlen = strlen(e->d_name);
if (nlen < 5 || strcmp(e->d_name + nlen - 4, ".pad") != 0) continue;
/* Found a .pad file. The chksum is the filename without .pad. */
char chksum[128];
size_t clen = nlen - 4;
if (clen >= sizeof(chksum)) continue;
memcpy(chksum, e->d_name, clen);
chksum[clen] = '\0';
(*out_dirs)[count] = strdup(dir);
(*out_pads)[count] = strdup(chksum);
count++;
}
closedir(d);
}
}
fclose(mtab);
return count;
}
/*
* Interactive OTP pad selection prompt.
* Shown after index whitelist when no --otp-pad-dir flag was given and
* stdin is a TTY. Automatically scans attached USB drives for pads and
* offers them. Falls back to manual directory entry if no pads are found.
*
* On success with a pad selected, returns 0 and fills:
* *out_pad_dir — malloc'd pad directory path (caller frees)
* *out_pad_spec — malloc'd pad chksum/prefix (caller frees)
* *out_allow_blkback — 1 if the user acknowledged blkback, 0 otherwise
* Returns 1 if the user declined (no pad), -1 on read error.
*/
static int prompt_otp_pad(char **out_pad_dir, char **out_pad_spec,
int *out_allow_blkback) {
char input[512];
*out_pad_dir = NULL;
*out_pad_spec = NULL;
*out_allow_blkback = 0;
/* Auto-scan USB drives for pads. */
char *found_dirs[OTP_SCAN_MAX];
char *found_pads[OTP_SCAN_MAX];
int found_count = scan_usb_pads(&found_dirs, &found_pads);
if (found_count > 0) {
/* Offer the discovered pads. */
for (;;) {
tui_render_content_screen(NULL, "OTP pad — pads found on USB drives");
printf("Found %d pad(s) on attached USB drive(s):\n\n", found_count);
for (int i = 0; i < found_count; i++) {
printf(" %d. %s (in %s)\n", i + 1, found_pads[i], found_dirs[i]);
}
printf("\n Type a number to select, 'm' for manual entry, 'n' to skip\n");
printf(" Enter = 1 (first pad)\n");
printf("> ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
for (int i = 0; i < found_count; i++) {
free(found_dirs[i]); free(found_pads[i]);
}
return -1;
}
{
size_t len = strlen(input);
while (len > 0 && (input[len-1] == '\n' || input[len-1] == '\r' ||
input[len-1] == ' ' || input[len-1] == '\t')) {
input[--len] = '\0';
}
}
if (input[0] == '\0') {
/* Default: first pad. */
*out_pad_dir = strdup(found_dirs[0]);
*out_pad_spec = strdup(found_pads[0]);
break;
}
if (input[0] == 'n' || input[0] == 'N') {
for (int i = 0; i < found_count; i++) {
free(found_dirs[i]); free(found_pads[i]);
}
return 1; /* declined */
}
if (input[0] == 'm' || input[0] == 'M') {
/* Fall through to manual entry. */
break;
}
/* Try to parse a number. */
int choice = atoi(input);
if (choice >= 1 && choice <= found_count) {
*out_pad_dir = strdup(found_dirs[choice - 1]);
*out_pad_spec = strdup(found_pads[choice - 1]);
break;
}
printf("Invalid selection. Type 1-%d, 'm', or 'n'.\n", found_count);
}
/* If the user selected a pad (not manual), we're done. */
if (*out_pad_dir != NULL) {
for (int i = 0; i < found_count; i++) {
free(found_dirs[i]); free(found_pads[i]);
}
/* USB drives (/dev/sd*) are not blkback, so no warning needed. */
return 0;
}
/* Manual entry requested — free the scan results and fall through. */
for (int i = 0; i < found_count; i++) {
free(found_dirs[i]); free(found_pads[i]);
}
}
/* No pads found on USB, or user chose manual entry. */
for (;;) {
tui_render_content_screen(NULL, "OTP pad — bind a one-time pad?");
if (found_count > 0) {
printf("Manual pad directory entry:\n\n");
} else {
printf("No pads found on attached USB drives.\n");
printf("Do you want to manually specify a pad directory? (y/n)\n\n");
printf(" Enter = no\n");
printf("> ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
return -1;
}
{
size_t len = strlen(input);
while (len > 0 && (input[len-1] == '\n' || input[len-1] == '\r' ||
input[len-1] == ' ' || input[len-1] == '\t')) {
input[--len] = '\0';
}
}
if (input[0] == '\0' || input[0] == 'n' || input[0] == 'N') {
return 1; /* declined */
}
if (input[0] != 'y' && input[0] != 'Y') {
printf("Please type 'y' or 'n'.\n");
continue;
}
}
/* Prompt for pad directory. */
tui_render_content_screen(NULL, "OTP pad — pad directory");
printf("Enter the directory containing the .pad and .state files:\n\n");
printf(" Examples:\n");
printf(" /media/user/Music/pads\n");
printf(" /mnt/usb/pads\n");
printf("\n (This is typically a directory on a USB drive.)\n");
printf("> ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
return -1;
}
{
size_t len = strlen(input);
while (len > 0 && (input[len-1] == '\n' || input[len-1] == '\r' ||
input[len-1] == ' ' || input[len-1] == '\t')) {
input[--len] = '\0';
}
}
if (input[0] == '\0') {
printf("No directory entered. Skipping OTP pad.\n");
return 1;
}
struct stat st;
if (stat(input, &st) != 0 || !S_ISDIR(st.st_mode)) {
printf("Directory '%s' not found or not a directory. Try again.\n", input);
continue;
}
*out_pad_dir = strdup(input);
break;
}
/* Prompt for pad checksum or prefix. */
for (;;) {
tui_render_content_screen(NULL, "OTP pad — pad checksum or prefix");
printf("Enter the pad checksum (64 hex chars) or a unique prefix:\n\n");
printf(" The pad file is named <chksum>.pad in the directory.\n");
printf(" You can enter the first few characters if unique.\n");
printf(" (Press Enter to list available pads in the directory.)\n");
printf("> ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
free(*out_pad_dir);
*out_pad_dir = NULL;
return -1;
}
{
size_t len = strlen(input);
while (len > 0 && (input[len-1] == '\n' || input[len-1] == '\r' ||
input[len-1] == ' ' || input[len-1] == '\t')) {
input[--len] = '\0';
}
}
if (input[0] == '\0') {
/* List available pads. */
DIR *d = opendir(*out_pad_dir);
if (!d) {
printf("Cannot open directory '%s'. Try again.\n", *out_pad_dir);
continue;
}
printf("\nAvailable pads in %s:\n", *out_pad_dir);
struct dirent *e;
int count = 0;
while ((e = readdir(d)) != NULL) {
size_t nlen = strlen(e->d_name);
if (nlen > 4 && strcmp(e->d_name + nlen - 4, ".pad") == 0) {
printf(" %.*s\n", (int)(nlen - 4), e->d_name);
count++;
}
}
closedir(d);
if (count == 0) {
printf(" (no .pad files found)\n");
}
printf("\n");
continue;
}
*out_pad_spec = strdup(input);
break;
}
/* Check if the pad directory is on a blkback device and warn. */
{
const char *dir = *out_pad_dir;
FILE *mtab = fopen("/proc/mounts", "r");
int is_blkback = 0;
if (mtab) {
char line[1024];
size_t best_len = 0;
while (fgets(line, sizeof(line), mtab)) {
char source[512], mount[512], fstype[64];
if (sscanf(line, "%511s %511s %63s", source, mount, fstype) < 3) continue;
size_t mlen = strlen(mount);
if (strncmp(dir, mount, mlen) == 0 &&
(dir[mlen] == '/' || dir[mlen] == '\0') &&
mlen > best_len) {
best_len = mlen;
is_blkback = (strncmp(source, "/dev/xvd", 8) == 0);
}
}
fclose(mtab);
}
if (is_blkback) {
tui_render_content_screen(NULL, "OTP pad — blkback warning");
printf("WARNING: %s appears to be on a blkback device (qvm-block).\n", dir);
printf("For pad secrecy, PCI USB controller passthrough is recommended.\n");
printf("Continue anyway? (y/n)\n");
printf("> ");
fflush(stdout);
if (read_line_stdin(input, sizeof(input)) != 0) {
free(*out_pad_dir); free(*out_pad_spec);
*out_pad_dir = NULL; *out_pad_spec = NULL;
return -1;
}
if (input[0] == 'y' || input[0] == 'Y') {
*out_allow_blkback = 1;
} else {
printf("OTP pad binding cancelled.\n");
free(*out_pad_dir); free(*out_pad_spec);
*out_pad_dir = NULL; *out_pad_spec = NULL;
return 1;
}
}
}
return 0;
}
int main(int argc, char *argv[]) {
mnemonic_state_t mnemonic;
role_table_t role_table;
dispatcher_ctx_t dispatcher;
policy_table_t policy;
server_ctx_t server;
key_store_t key_store;
static algorithm_key_cache_t alg_key_cache;
struct pollfd pfds[4]; /* max: 3 listeners (unix+tcp+http) + stdin */
uid_t owner_uid;
int derived_count;
const char *socket_name = NSIGNER_DEFAULT_SOCKET_NAME;
char generated_socket_name[SERVER_SOCKET_NAME_MAX];
int socket_name_explicit = 0;
int listen_mode = NSIGNER_LISTEN_UNIX;
int listen_mode_explicit = 0;
const char *listen_target = NSIGNER_DEFAULT_SOCKET_NAME;
int argi = 1;
const char *preapprove_specs[POLICY_MAX_ENTRIES];
int preapprove_count = 0;
const char *register_role_specs[ROLE_TABLE_MAX_ENTRIES];
int register_role_count = 0;
int auth_mode = NSIGNER_AUTH_OFF;
int auth_skew_seconds = AUTH_DEFAULT_SKEW_SECONDS;
int allow_all = 0;
int bridge_source_trusted = 0;
mnemonic_source_t mnemonic_source = { MNEMONIC_SOURCE_TUI, -1 };
const char *otp_pad_dir = NULL;
const char *otp_pad_spec = NULL;
int otp_allow_blkback = 0;
while (argi < argc) {
if (strcmp(argv[argi], "--socket-name") == 0 ||
strcmp(argv[argi], "--name") == 0 ||
strcmp(argv[argi], "-n") == 0) {
if (argi + 1 >= argc) {
fprintf(stderr, "Missing value for %s\n", argv[argi]);
return 1;
}
socket_name = argv[argi + 1];
socket_name_explicit = 1;
argi += 2;
continue;
}
if (strcmp(argv[argi], "--listen") == 0 || strcmp(argv[argi], "-l") == 0) {
if (argi + 1 >= argc) {
fprintf(stderr, "Missing value for %s\n", argv[argi]);
return 1;
}
listen_mode_explicit = 1;
if (strcmp(argv[argi + 1], "unix") == 0) {
listen_mode = NSIGNER_LISTEN_UNIX;
} else if (strcmp(argv[argi + 1], "stdio") == 0) {
listen_mode = NSIGNER_LISTEN_STDIO;
} else if (strcmp(argv[argi + 1], "qrexec") == 0) {
listen_mode = NSIGNER_LISTEN_QREXEC;
} else if (strncmp(argv[argi + 1], "tcp:", 4) == 0) {
listen_mode = NSIGNER_LISTEN_TCP;
listen_target = argv[argi + 1];
} else if (strncmp(argv[argi + 1], "http:", 5) == 0) {
listen_mode = NSIGNER_LISTEN_HTTP;
listen_target = argv[argi + 1];
} else {
fprintf(stderr, "Invalid --listen mode: %s (expected unix|stdio|qrexec|tcp:HOST:PORT|http:HOST:PORT)\n", argv[argi + 1]);
return 1;
}
argi += 2;
continue;
}
if (strcmp(argv[argi], "--auth") == 0 || strcmp(argv[argi], "-a") == 0) {
if (argi + 1 >= argc) {
fprintf(stderr, "Missing value for %s\n", argv[argi]);
return 1;
}
if (strcmp(argv[argi + 1], "off") == 0) {
auth_mode = NSIGNER_AUTH_OFF;
} else if (strcmp(argv[argi + 1], "optional") == 0) {
auth_mode = NSIGNER_AUTH_OPTIONAL;
} else if (strcmp(argv[argi + 1], "required") == 0) {
auth_mode = NSIGNER_AUTH_REQUIRED;
} else {
fprintf(stderr, "Invalid --auth mode: %s (expected off|optional|required)\n", argv[argi + 1]);
return 1;
}
argi += 2;
continue;
}
if (strcmp(argv[argi], "--preapprove") == 0 || strcmp(argv[argi], "-p") == 0) {
if (argi + 1 >= argc) {
fprintf(stderr, "Missing value for %s\n", argv[argi]);
return 1;
}
if (preapprove_count >= POLICY_MAX_ENTRIES) {
fprintf(stderr, "Too many --preapprove entries (max %d)\n", POLICY_MAX_ENTRIES);
return 1;
}
preapprove_specs[preapprove_count++] = argv[argi + 1];
argi += 2;
continue;
}
if (strcmp(argv[argi], "--register-role") == 0) {
if (argi + 1 >= argc) {
fprintf(stderr, "Missing value for %s\n", argv[argi]);
return 1;
}
if (register_role_count >= ROLE_TABLE_MAX_ENTRIES) {
fprintf(stderr, "Too many --register-role entries (max %d)\n", ROLE_TABLE_MAX_ENTRIES);
return 1;
}
register_role_specs[register_role_count++] = argv[argi + 1];
argi += 2;
continue;
}
if (strcmp(argv[argi], "--mnemonic-stdin") == 0) {
if (mnemonic_source.kind != MNEMONIC_SOURCE_TUI) {
fprintf(stderr, "nsigner: --mnemonic-stdin and --mnemonic-fd are mutually exclusive\n");
return 1;
}
mnemonic_source.kind = MNEMONIC_SOURCE_STDIN;
mnemonic_source.fd = STDIN_FILENO;
argi += 1;
continue;
}
if (strcmp(argv[argi], "--mnemonic-fd") == 0) {
char *endp = NULL;
long parsed_fd;
if (argi + 1 >= argc) {
fprintf(stderr, "Missing value for %s\n", argv[argi]);
return 1;
}
if (mnemonic_source.kind != MNEMONIC_SOURCE_TUI) {
fprintf(stderr, "nsigner: --mnemonic-stdin and --mnemonic-fd are mutually exclusive\n");
return 1;
}
errno = 0;
parsed_fd = strtol(argv[argi + 1], &endp, 10);
if (errno != 0 || endp == argv[argi + 1] || *endp != '\0' || parsed_fd < 0 || parsed_fd > INT_MAX) {
fprintf(stderr, "nsigner: --mnemonic-fd %s: invalid FD value\n", argv[argi + 1]);
return 1;
}
mnemonic_source.kind = MNEMONIC_SOURCE_FD;
mnemonic_source.fd = (int)parsed_fd;
argi += 2;
continue;
}
if (strcmp(argv[argi], "--allow-all") == 0 || strcmp(argv[argi], "-A") == 0) {
allow_all = 1;
argi += 1;
continue;
}
if (strcmp(argv[argi], "--bridge-source-trusted") == 0) {
bridge_source_trusted = 1;
argi += 1;
continue;
}
if (strcmp(argv[argi], "--otp-pad-dir") == 0) {
if (argi + 1 >= argc) {
fprintf(stderr, "Missing value for %s\n", argv[argi]);
return 1;
}
otp_pad_dir = argv[argi + 1];
argi += 2;
continue;
}
if (strcmp(argv[argi], "--otp-pad") == 0) {
if (argi + 1 >= argc) {
fprintf(stderr, "Missing value for %s\n", argv[argi]);
return 1;
}
otp_pad_spec = argv[argi + 1];
argi += 2;
continue;
}
if (strcmp(argv[argi], "--otp-allow-blkback") == 0) {
otp_allow_blkback = 1;
argi += 1;
continue;
}
break;
}
if (argi < argc && strcmp(argv[argi], "client") == 0) {
if (listen_mode != NSIGNER_LISTEN_UNIX) {
fprintf(stderr, "--listen is server-only; client mode uses unix abstract sockets\n");
return 1;
}
return client_main(argc - argi - 1, argv + argi + 1, socket_name, socket_name_explicit);
}
if (argi < argc && strcmp(argv[argi], "bridge") == 0) {
/* bridge: stateless qrexec → unix-socket relay (no mnemonic, no listen) */
return bridge_main(argc - argi - 1, argv + argi + 1, socket_name, socket_name_explicit);
}
if (argi < argc && strcmp(argv[argi], "list") == 0) {
if (listen_mode != NSIGNER_LISTEN_UNIX) {
fprintf(stderr, "--listen is server-only; list inspects unix abstract sockets\n");
return 1;
}
return list_sockets_main();
}
if (argi < argc && (strcmp(argv[argi], "--version") == 0 || strcmp(argv[argi], "-v") == 0)) {
printf("nsigner %s\n", NSIGNER_VERSION);
return 0;
}
if (argi < argc && (strcmp(argv[argi], "--help") == 0 || strcmp(argv[argi], "-h") == 0)) {
print_usage(argv[0]);
return 0;
}
if (argi < argc) {
fprintf(stderr, "Unknown argument: %s\n", argv[argi]);
print_usage(argv[0]);
return 1;
}
if (mnemonic_source.kind == MNEMONIC_SOURCE_STDIN &&
(listen_mode == NSIGNER_LISTEN_STDIO || listen_mode == NSIGNER_LISTEN_QREXEC)) {
fprintf(stderr, "nsigner: --mnemonic-stdin requires --listen unix or --listen tcp:...\n");
return 1;
}
if (mnemonic_source.kind == MNEMONIC_SOURCE_FD) {
if (mnemonic_source.fd == STDOUT_FILENO) {
fprintf(stderr, "nsigner: --mnemonic-fd 1 is not allowed\n");
return 1;
}
if (mnemonic_source.fd == STDIN_FILENO &&
(listen_mode == NSIGNER_LISTEN_STDIO || listen_mode == NSIGNER_LISTEN_QREXEC)) {
fprintf(stderr, "nsigner: --mnemonic-fd 0 cannot be used with --listen stdio or --listen qrexec\n");
return 1;
}
}
printf("nsigner %s\n", NSIGNER_VERSION);
fflush(stdout);
g_startup_mnemonic_source_kind = mnemonic_source.kind;
mnemonic_init(&mnemonic);
if (load_mnemonic(&mnemonic, &mnemonic_source) != 0) {
mnemonic_unload(&mnemonic);
return 1;
}
role_table_init(&role_table);
/* Interactive role definition wizard (only in TUI mode) */
if (mnemonic_source.kind == MNEMONIC_SOURCE_TUI && isatty(STDIN_FILENO)) {
if (prompt_named_path_roles(&role_table) != 0) {
fprintf(stderr, "At least one role must be defined.\n");
mnemonic_unload(&mnemonic);
return 1;
}
} else {
/* Non-interactive mode. If --register-role specs were provided,
* register those roles (suppressing the default "main" role).
* Otherwise, create a default "main" role with the standard
* NIP-06 path. */
if (register_role_count > 0) {
for (int i = 0; i < register_role_count; ++i) {
if (register_role_from_spec(&role_table, register_role_specs[i]) != 0) {
fprintf(stderr, "Failed to register role from --register-role spec\n");
mnemonic_unload(&mnemonic);
return 1;
}
}
} else {
role_entry_t role;
memset(&role, 0, sizeof(role));
strncpy(role.name, "main", sizeof(role.name) - 1);
strncpy(role.purpose_str, "nostr", sizeof(role.purpose_str) - 1);
strncpy(role.curve_str, "secp256k1", sizeof(role.curve_str) - 1);
role.purpose = role_purpose_from_str(role.purpose_str);
role.curve = role_curve_from_str(role.curve_str);
role.selector_type = SELECTOR_ROLE_PATH;
strncpy(role.role_path, "m/44'/1237'/0'/0/0", sizeof(role.role_path) - 1);
role.role_path[sizeof(role.role_path) - 1] = '\0';
role.nostr_index = -1;
role.path_range_lo = -1;
role.path_range_hi = -1;
role.path_default_index = -1;
role.requires_approval = 1;
role.derived = 0;
if (role_table_add(&role_table, &role) != 0) {
fprintf(stderr, "Failed to initialize default role\n");
mnemonic_unload(&mnemonic);
return 1;
}
}
}
memset(&key_store, 0, sizeof(key_store));
alg_key_cache_init(&alg_key_cache);
owner_uid = getuid();
policy_init_default(&policy, owner_uid);
for (int i = 0; i < preapprove_count; ++i) {
policy_entry_t entry;
int parsed_nostr_index = -1;
if (parse_preapprove_spec(preapprove_specs[i], &entry, &parsed_nostr_index) != 0) {
mnemonic_unload(&mnemonic);
return 1;
}
entry.source = POLICY_SOURCE_PREAPPROVE;
/* Role-based entries: register the nostr_index role if needed.
* Algorithm-based entries (alg_count > 0) don't need a role. */
if (entry.alg_count == 0 && parsed_nostr_index >= 0 &&
role_table_find_by_nostr_index(&role_table, parsed_nostr_index) == NULL) {
if (role_table_register_nostr_index(&role_table, parsed_nostr_index) != 0) {
fprintf(stderr,
"ERROR: failed to register role for --preapprove nostr_index=%d\n",
parsed_nostr_index);
mnemonic_unload(&mnemonic);
return 1;
}
}
if (policy_table_insert_before_last(&policy, &entry) != 0) {
fprintf(stderr, "ERROR: failed to insert --preapprove policy entry (table full): %s\n", preapprove_specs[i]);
mnemonic_unload(&mnemonic);
return 1;
}
if (entry.alg_count > 0) {
fprintf(stderr, "[PREAPPROVE] caller=%s algorithm=%s verbs=%d\n",
entry.caller, entry.algorithms[0], entry.verb_count);
} else {
fprintf(stderr, "[PREAPPROVE] caller=%s role=%s\n", entry.caller, entry.roles[0]);
}
}
apply_test_overrides(&policy);
if (allow_all) {
server_set_prompt_always_allow(1);
}
if (nostr_init() != 0) {
fprintf(stderr, "Failed to initialize crypto subsystem\n");
mnemonic_unload(&mnemonic);
return 1;
}
derived_count = crypto_derive_all(&key_store, &role_table, &mnemonic);
if (derived_count < 0) {
fprintf(stderr, "Failed to derive keys from mnemonic\n");
nostr_cleanup();
mnemonic_unload(&mnemonic);
return 1;
}
dispatcher_init(&dispatcher, &role_table, &mnemonic, &key_store, &alg_key_cache);
/* Bind OTP pad if requested. One pad per session. */
if (otp_pad_dir != NULL) {
if (otp_pad_spec == NULL) {
fprintf(stderr, "nsigner: --otp-pad-dir requires --otp-pad <chksum-or-prefix>\n");
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup(); mnemonic_unload(&mnemonic);
return 1;
}
if (otp_pad_bind(otp_pad_dir, otp_pad_spec, otp_allow_blkback) != 0) {
fprintf(stderr, "nsigner: failed to bind OTP pad\n");
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup(); mnemonic_unload(&mnemonic);
return 1;
}
}
/*
* Interactive transport selection: if no --listen flag was given and
* stdin is a TTY, show the multi-select transport menu. This lets the
* user choose how other programs reach the signer without memorizing
* CLI flags. CLI flags skip the menu (backward compatible).
*/
int transport_mask = 0;
int multi_listen = 0; /* set when multiple persistent listeners are active */
server_ctx_t servers[3]; /* max: unix + tcp + http */
int server_count = 0;
int unix_server_idx = -1;
int tcp_server_idx = -1;
if (!listen_mode_explicit && isatty(STDIN_FILENO) &&
mnemonic_source.kind == MNEMONIC_SOURCE_TUI) {
transport_mask = prompt_transport_selection();
if (transport_mask == 0) {
fprintf(stderr, "No transport selected. Exiting.\n");
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
mnemonic_unload(&mnemonic);
return 1;
}
/* OTP pad binding is now handled in the role wizard (option 9).
* The standalone OTP pad prompt has been removed. If a pad was bound
* via the wizard, use it; otherwise --otp-pad-dir from CLI still works. */
if (otp_pad_dir == NULL && g_wizard_otp_dir[0] != '\0') {
otp_pad_dir = g_wizard_otp_dir;
otp_pad_spec = g_wizard_otp_spec;
}
/* Persistent listeners — configure from menu selection */
multi_listen = 1;
/* Unix socket (with or without bridge-source-trusted) */
if (transport_mask & (TRANSPORT_UNIX | TRANSPORT_QREXEC_BRIDGE)) {
/* Use fixed name "nsigner" for scripted access */
socket_name = "nsigner";
socket_name_explicit = 1;
listen_mode = NSIGNER_LISTEN_UNIX;
listen_target = socket_name;
if (transport_mask & TRANSPORT_QREXEC_BRIDGE) {
bridge_source_trusted = 1;
}
}
/* TCP listener */
if (transport_mask & TRANSPORT_TCP) {
/* Will be started as a second listener */
}
}
if (listen_mode == NSIGNER_LISTEN_UNIX && !socket_name_explicit) {
if (socket_name_random(generated_socket_name, sizeof(generated_socket_name)) != 0) {
fprintf(stderr, "Failed to generate random socket name\n");
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
mnemonic_unload(&mnemonic);
return 1;
}
socket_name = generated_socket_name;
}
if (listen_mode == NSIGNER_LISTEN_UNIX) {
listen_target = socket_name;
} else if ((listen_mode == NSIGNER_LISTEN_TCP ||
listen_mode == NSIGNER_LISTEN_HTTP) && socket_name_explicit) {
fprintf(stderr, "--socket-name is only valid with unix listen mode\n");
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
mnemonic_unload(&mnemonic);
return 1;
}
if ((listen_mode == NSIGNER_LISTEN_UNIX || listen_mode == NSIGNER_LISTEN_STDIO) &&
auth_mode != NSIGNER_AUTH_OFF) {
fprintf(stderr, "--auth is currently supported only with --listen qrexec (optional/required) and tcp (required)\n");
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
mnemonic_unload(&mnemonic);
return 1;
}
if (listen_mode == NSIGNER_LISTEN_TCP) {
auth_mode = NSIGNER_AUTH_REQUIRED;
}
/* HTTP mode: no auth envelopes by default (rely on localhost + policy). */
server_init(&server,
listen_target,
socket_name_explicit,
listen_mode,
auth_mode,
auth_skew_seconds,
&dispatcher,
&policy);
if (bridge_source_trusted) {
server_set_bridge_source_trusted(&server, 1);
}
if (server_start(&server) != 0) {
if (listen_mode == NSIGNER_LISTEN_UNIX) {
fprintf(stderr, "Failed to start server on %s: %s\n", socket_name, server_last_error(&server));
} else if (listen_mode == NSIGNER_LISTEN_TCP ||
listen_mode == NSIGNER_LISTEN_HTTP) {
fprintf(stderr, "Failed to start server on %s: %s\n", listen_target, server_last_error(&server));
} else {
fprintf(stderr, "Failed to start server (%s): %s\n",
(listen_mode == NSIGNER_LISTEN_QREXEC) ? "qrexec" : "stdio",
server_last_error(&server));
}
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
mnemonic_unload(&mnemonic);
return 1;
}
/*
* Multi-listener: if interactive menu selected TCP in addition to unix,
* start a second server context for TCP. The primary server (unix) is
* already running. Both share the same dispatcher and policy.
*/
if (multi_listen && (transport_mask & TRANSPORT_TCP)) {
const char *tcp_target = "tcp:[::]:11111";
tcp_server_idx = server_count;
server_init(&servers[tcp_server_idx],
tcp_target,
0, /* socket_name_explicit = 0 for TCP */
NSIGNER_LISTEN_TCP,
NSIGNER_AUTH_REQUIRED,
auth_skew_seconds,
&dispatcher,
&policy);
if (server_start(&servers[tcp_server_idx]) != 0) {
fprintf(stderr, "Failed to start FIPS/TCP server on %s: %s\n",
tcp_target, server_last_error(&servers[tcp_server_idx]));
server_stop(&server);
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
mnemonic_unload(&mnemonic);
return 1;
}
server_count++;
}
/* HTTP listener (multi-listener mode) */
int http_server_idx = -1;
if (multi_listen && (transport_mask & TRANSPORT_HTTP)) {
const char *http_target = "http:127.0.0.1:11111";
http_server_idx = server_count;
server_init(&servers[http_server_idx],
http_target,
0,
NSIGNER_LISTEN_HTTP,
NSIGNER_AUTH_OFF,
auth_skew_seconds,
&dispatcher,
&policy);
if (server_start(&servers[http_server_idx]) != 0) {
fprintf(stderr, "Failed to start HTTP server on %s: %s\n",
http_target, server_last_error(&servers[http_server_idx]));
/* Stop already-started servers */
for (int si = 0; si < server_count; si++) server_stop(&servers[si]);
server_stop(&server);
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
mnemonic_unload(&mnemonic);
return 1;
}
server_count++;
}
/* Copy the primary (unix) server into the array for unified polling */
if (multi_listen) {
unix_server_idx = server_count;
servers[unix_server_idx] = server; /* struct copy */
server_count++;
}
(void)signal(SIGINT, handle_signal);
(void)signal(SIGTERM, handle_signal);
/*
* Ignore SIGPIPE so that writing to a socket whose peer has closed returns
* EPIPE instead of killing the signer process. A long-running attended
* signer must survive clients that disconnect abruptly (e.g. the
* nostr_core_lib client reconnects per request, so it closes the previous
* connection; if the server happens to write while the peer is closing,
* SIGPIPE would otherwise terminate the whole signer).
*/
(void)signal(SIGPIPE, SIG_IGN);
{
char fips_ipv6[128];
char fips_npub[256];
char listen_port[16];
int have_fips_identity =
(lookup_local_fips_identity(fips_ipv6, sizeof(fips_ipv6), fips_npub, sizeof(fips_npub)) == 0);
connection_info_clear();
if (multi_listen) {
/* Multi-listener mode: show all active transports */
if (transport_mask & (TRANSPORT_UNIX | TRANSPORT_QREXEC_BRIDGE)) {
char unix_conn[128];
char unix_example[256];
char unix_extra[256] = "";
snprintf(unix_conn, sizeof(unix_conn), "%s", socket_name);
snprintf(unix_example, sizeof(unix_example),
"nsigner --socket-name %s client '<json>'", socket_name);
if (transport_mask & TRANSPORT_QREXEC_BRIDGE) {
snprintf(unix_extra, sizeof(unix_extra),
"Qrexec (bridge-source-trusted):\n"
" qrexec-client-vm <target_qube> %s",
NSIGNER_QREXEC_SERVICE_NAME);
printf("qrexec service: %s\n", NSIGNER_QREXEC_SERVICE_NAME);
}
connection_info_add_transport("Unix socket", unix_conn, unix_example, unix_extra);
printf("System is ready and waiting for connections on %s.\n", socket_name);
}
if (transport_mask & TRANSPORT_TCP) {
const char *tcp_addr = servers[tcp_server_idx].socket_name;
char fips_conn[256] = "";
char fips_example[256] = "";
/* If we have a FIPS identity, show the npub-based URL */
if (have_fips_identity &&
extract_listen_port(tcp_addr, listen_port, sizeof(listen_port)) == 0) {
snprintf(fips_conn, sizeof(fips_conn),
"http://%s.fips:%s", fips_npub, listen_port);
snprintf(fips_example, sizeof(fips_example),
"curl -X POST http://%s.fips:%s/ \\\n"
" -H 'Content-Type: application/json' \\\n"
" -d '<json>'", fips_npub, listen_port);
printf("fips address: http://%s.fips:%s\n", fips_npub, listen_port);
} else {
snprintf(fips_conn, sizeof(fips_conn), "%s", tcp_addr);
snprintf(fips_example, sizeof(fips_example),
"nsigner --listen %s client '<json>'", tcp_addr);
}
connection_info_add_transport("FIPS", fips_conn, fips_example, "");
printf("System is ready and waiting for connections on %s.\n", tcp_addr);
}
if (transport_mask & TRANSPORT_HTTP) {
const char *http_addr = servers[http_server_idx].socket_name;
char http_conn[256];
char http_example[256];
snprintf(http_conn, sizeof(http_conn), "http://%s", http_addr + 5);
snprintf(http_example, sizeof(http_example),
"curl -X POST http://%s/ \\\n"
" -H 'Content-Type: application/json' \\\n"
" -d '<json>'", http_addr + 5);
connection_info_add_transport("HTTP", http_conn, http_example, "");
printf("System is ready and waiting for connections on http://%s.\n", http_addr + 5);
}
} else if (listen_mode == NSIGNER_LISTEN_UNIX) {
char unix_conn[128];
char unix_example[256];
char unix_extra[256] = "";
snprintf(unix_conn, sizeof(unix_conn), "%s", socket_name);
snprintf(unix_example, sizeof(unix_example),
"nsigner --socket-name %s client '<json>'", socket_name);
if (bridge_source_trusted) {
snprintf(unix_extra, sizeof(unix_extra),
"Qrexec (bridge-source-trusted):\n"
" qrexec-client-vm <target_qube> %s",
NSIGNER_QREXEC_SERVICE_NAME);
printf("qrexec service: %s\n", NSIGNER_QREXEC_SERVICE_NAME);
}
connection_info_add_transport("Unix socket", unix_conn, unix_example, unix_extra);
printf("System is ready and waiting for connections on %s.\n", socket_name);
} else if (listen_mode == NSIGNER_LISTEN_TCP) {
const char *actual_addr = server.socket_name;
char fips_conn[256] = "";
char fips_example[256] = "";
if (have_fips_identity &&
extract_listen_port(actual_addr, listen_port, sizeof(listen_port)) == 0) {
snprintf(fips_conn, sizeof(fips_conn),
"http://%s.fips:%s", fips_npub, listen_port);
snprintf(fips_example, sizeof(fips_example),
"curl -X POST http://%s.fips:%s/ \\\n"
" -H 'Content-Type: application/json' \\\n"
" -d '<json>'", fips_npub, listen_port);
printf("fips address: http://%s.fips:%s\n", fips_npub, listen_port);
} else {
snprintf(fips_conn, sizeof(fips_conn), "%s", actual_addr);
snprintf(fips_example, sizeof(fips_example),
"nsigner --listen %s client '<json>'", actual_addr);
}
connection_info_add_transport("FIPS", fips_conn, fips_example, "");
printf("System is ready and waiting for connections on %s.\n", actual_addr);
} else if (listen_mode == NSIGNER_LISTEN_HTTP) {
const char *actual_addr = server.socket_name;
char http_conn[256];
char http_example[256];
snprintf(http_conn, sizeof(http_conn), "http://%s", actual_addr + 5);
snprintf(http_example, sizeof(http_example),
"curl -X POST http://%s/ \\\n"
" -H 'Content-Type: application/json' \\\n"
" -d '<json>'", actual_addr + 5);
connection_info_add_transport("HTTP", http_conn, http_example, "");
printf("System is ready and waiting for connections on %s.\n", actual_addr);
} else if (listen_mode == NSIGNER_LISTEN_QREXEC) {
connection_info_add_transport("Qrexec", "qrexec (one request per invocation)", "", "");
printf("System is ready and waiting for a qrexec request.\n");
} else {
connection_info_add_transport("Stdio", "stdio (one request per invocation)", "", "");
printf("System is ready and waiting for a stdio request.\n");
}
/* Show OTP pad status if bound. */
if (otp_pad_is_bound()) {
connection_info_set_otp("OTP pad: %s (offset %llu / %llu bytes)",
otp_pad_chksum(),
(unsigned long long)otp_pad_current_offset(),
(unsigned long long)otp_pad_size());
}
if (have_fips_identity) {
printf("fips ipv6: %s\n", fips_ipv6);
printf("fips npub: %s\n", fips_npub);
}
}
fflush(stdout);
if (listen_mode == NSIGNER_LISTEN_STDIO || listen_mode == NSIGNER_LISTEN_QREXEC) {
int hrc = server_handle_one(&server, NULL, NULL);
server_stop(&server);
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
mnemonic_unload(&mnemonic);
return (hrc < 0) ? 1 : 0;
}
if (listen_mode == NSIGNER_LISTEN_TCP ||
listen_mode == NSIGNER_LISTEN_HTTP) {
pfds[0].fd = server.listen_fd;
pfds[0].events = POLLIN;
while (g_running && server.running) {
int prc = poll(pfds, 1, 200);
if (prc < 0) {
if (errno == EINTR) {
continue;
}
break;
}
if (prc > 0 && (pfds[0].revents & POLLIN)) {
if (server_handle_one(&server, tcp_activity_stdout_cb, NULL) < 0) {
break;
}
}
}
server_stop(&server);
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
otp_pad_unbind();
mnemonic_unload(&mnemonic);
return 0;
}
memset(&g_activity_log, 0, sizeof(g_activity_log));
/* --allow-all maps to server_set_prompt_always_allow (needed by tests and
* non-interactive modes). The TUI auto-approve toggle has been removed;
* authorization is now per-role via requires_approval. */
server_set_prompt_always_allow(allow_all ? 1 : 0);
{
main_tui_context_t main_tui_ctx;
main_tui_ctx.role_table = &role_table;
main_tui_ctx.mnemonic = &mnemonic;
main_tui_ctx.derived_count = &derived_count;
main_tui_ctx.socket_name = socket_name;
server_set_approval_cb(tui_approval_cb, &main_tui_ctx);
tui_install_resize_handler();
render_status(&role_table, &mnemonic, derived_count, socket_name);
/* Set up poll fds: listener(s) + stdin */
int npfds = 0;
if (multi_listen) {
for (int si = 0; si < server_count; si++) {
pfds[npfds].fd = servers[si].listen_fd;
pfds[npfds].events = POLLIN;
npfds++;
}
} else {
pfds[npfds].fd = server.listen_fd;
pfds[npfds].events = POLLIN;
npfds++;
}
pfds[npfds].fd = STDIN_FILENO;
pfds[npfds].events = POLLIN;
npfds++;
int stdin_pfd_idx = npfds - 1;
while (g_running && server.running) {
int prc = poll(pfds, npfds, 200);
if (prc < 0) {
if (errno == EINTR) {
continue;
}
break;
}
if (tui_resize_pending()) {
render_status(&role_table, &mnemonic, derived_count, socket_name);
}
/* Check all listener fds for activity */
if (prc > 0) {
if (multi_listen) {
for (int si = 0; si < server_count; si++) {
if (pfds[si].revents & POLLIN) {
int hrc = server_handle_one(&servers[si], activity_log_cb, NULL);
if (hrc < 0) {
g_running = 0;
break;
}
render_status(&role_table, &mnemonic, derived_count, socket_name);
}
}
} else {
if (pfds[0].revents & POLLIN) {
int hrc = server_handle_one(&server, activity_log_cb, NULL);
if (hrc < 0) {
break;
}
render_status(&role_table, &mnemonic, derived_count, socket_name);
}
}
}
if (prc > 0 && (pfds[stdin_pfd_idx].revents & POLLIN)) {
char ch = '\0';
if (read(STDIN_FILENO, &ch, 1) > 0) {
char lower = (char)tolower((unsigned char)ch);
if (lower == 'q' || lower == 'x') {
g_running = 0;
} else if (lower == 'r') {
render_status(&role_table, &mnemonic, derived_count, socket_name);
} else if (lower == 'd') {
/* Display connection instructions on demand.
* Show the connections screen, wait for any key, then
* return to the normal status display.
*
* Use tui_get_key() rather than a bare read() so the
* wait survives EINTR (e.g. SIGWINCH); a bare read()
* returns immediately on signal interruption, which
* causes render_status() to run right away and scroll
* the connections view off the screen before the user
* has a chance to read it. */
render_connections(&role_table, &mnemonic, derived_count, socket_name);
(void)tui_get_key();
render_status(&role_table, &mnemonic, derived_count, socket_name);
} else if (lower == 'l') {
mnemonic_source_t relock_source;
printf("\n[lock] Session locked. Re-enter mnemonic to unlock.\n");
fflush(stdout);
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
mnemonic_unload(&mnemonic);
relock_source.kind = MNEMONIC_SOURCE_TUI;
relock_source.fd = -1;
if (g_startup_mnemonic_source_kind != MNEMONIC_SOURCE_TUI) {
printf("[lock] Re-unlock uses terminal prompt in this session.\n");
fflush(stdout);
}
if (load_mnemonic(&mnemonic, &relock_source) != 0) {
g_running = 0;
} else {
derived_count = crypto_derive_all(&key_store, &role_table, &mnemonic);
if (derived_count < 0) {
g_running = 0;
}
}
render_status(&role_table, &mnemonic, derived_count, socket_name);
}
}
}
}
server_set_approval_cb(NULL, NULL);
}
if (multi_listen) {
for (int si = 0; si < server_count; si++) {
server_stop(&servers[si]);
}
} else {
server_stop(&server);
}
crypto_wipe(&key_store); alg_key_cache_wipe(&alg_key_cache);
nostr_cleanup();
otp_pad_unbind();
mnemonic_unload(&mnemonic);
printf("Shutdown. All secrets wiped.\n");
return 0;
}
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