/* NSIGNER_HEADERLESS_DECLS_BEGIN */ #include #include #include #include /* 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 */ } 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); /* 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 */ /* 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]; } 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 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" /* 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_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); /* * 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": , "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 65536 /* Caller identity */ typedef struct { uid_t uid; gid_t gid; pid_t pid; char caller_id[POLICY_CALLER_MAX_LEN]; /* "uid:" */ } caller_identity_t; /* Server context */ typedef struct { char socket_name[SERVER_SOCKET_NAME_MAX]; /* abstract namespace name (without \0 prefix) */ char last_error[256]; int listen_fd; int running; dispatcher_ctx_t *dispatcher; policy_table_t *policy; int socket_name_explicit; } 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, 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); /* from socket_name.h */ /* * Generate random socket name in format: nsigner__ * 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 0 #define NSIGNER_VERSION_PATCH 2 #define NSIGNER_VERSION "v0.0.2" /* NSIGNER_HEADERLESS_DECLS_END */ #include #include static int g_failures = 0; static void check_condition(const char *name, int condition) { if (condition) { printf("PASS: %s\n", name); } else { printf("FAIL: %s\n", name); g_failures++; } } static role_entry_t make_nostr_entry(const char *name, const char *purpose, const char *curve, int idx) { role_entry_t e; memset(&e, 0, sizeof(e)); strncpy(e.name, name, sizeof(e.name) - 1); strncpy(e.purpose_str, purpose, sizeof(e.purpose_str) - 1); strncpy(e.curve_str, curve, sizeof(e.curve_str) - 1); e.purpose = role_purpose_from_str(e.purpose_str); e.curve = role_curve_from_str(e.curve_str); e.selector_type = SELECTOR_NOSTR_INDEX; e.nostr_index = idx; e.derived = 0; return e; } static role_entry_t make_path_entry(const char *name, const char *purpose, const char *curve, const char *path) { role_entry_t e; memset(&e, 0, sizeof(e)); strncpy(e.name, name, sizeof(e.name) - 1); strncpy(e.purpose_str, purpose, sizeof(e.purpose_str) - 1); strncpy(e.curve_str, curve, sizeof(e.curve_str) - 1); strncpy(e.role_path, path, sizeof(e.role_path) - 1); e.purpose = role_purpose_from_str(e.purpose_str); e.curve = role_curve_from_str(e.curve_str); e.selector_type = SELECTOR_ROLE_PATH; e.nostr_index = -1; e.derived = 0; return e; } int main(void) { role_table_t table; role_entry_t e_main; role_entry_t e_throwaway; role_entry_t e_btc; role_entry_t e_ssh; role_entry_t *found; int rc; int i; role_table_init(&table); check_condition("init count==0", table.count == 0); e_main = make_nostr_entry("main", "nostr", "secp256k1", 0); rc = role_table_add(&table, &e_main); check_condition("add main returns 0", rc == 0); e_throwaway = make_nostr_entry("throwaway", "nostr", "secp256k1", 1); rc = role_table_add(&table, &e_throwaway); check_condition("add throwaway returns 0", rc == 0); e_btc = make_path_entry("btc_savings", "bitcoin", "secp256k1", "m/84'/0'/0'/0/0"); rc = role_table_add(&table, &e_btc); check_condition("add btc_savings returns 0", rc == 0); e_ssh = make_path_entry("ssh_key", "ssh", "ed25519", "m/44'/822'/0'/0/0"); rc = role_table_add(&table, &e_ssh); check_condition("add ssh_key returns 0", rc == 0); found = role_table_find_by_name(&table, "main"); check_condition("find_by_name(main) not NULL", found != NULL); check_condition("find_by_name(main) purpose nostr", found != NULL && found->purpose == PURPOSE_NOSTR); found = role_table_find_by_nostr_index(&table, 1); check_condition("find_by_nostr_index(1) is throwaway", found != NULL && strcmp(found->name, "throwaway") == 0); found = role_table_find_by_path(&table, "m/84'/0'/0'/0/0"); check_condition("find_by_path btc path is btc_savings", found != NULL && strcmp(found->name, "btc_savings") == 0); found = role_table_get_default(&table); check_condition("get_default() is main", found != NULL && strcmp(found->name, "main") == 0); rc = role_table_add(&table, &e_main); check_condition("duplicate name rejection returns -2", rc == -2); role_table_init(&table); rc = role_table_register_nostr_index(&table, 7); check_condition("register nostr_index=7 returns 0", rc == 0); found = role_table_find_by_nostr_index(&table, 7); check_condition("register nostr_index=7 creates role", found != NULL); check_condition("registered role name is nostr_idx_7", found != NULL && strcmp(found->name, "nostr_idx_7") == 0); check_condition("registered role purpose nostr", found != NULL && found->purpose == PURPOSE_NOSTR); check_condition("registered role curve secp256k1", found != NULL && found->curve == CURVE_SECP256K1); check_condition("registered role selector type nostr_index", found != NULL && found->selector_type == SELECTOR_NOSTR_INDEX); rc = role_table_register_nostr_index(&table, 7); check_condition("register nostr_index=7 idempotent second call", rc == 0); check_condition("register nostr_index=7 idempotent no duplicate", table.count == 1); role_table_init(&table); for (i = 0; i < ROLE_TABLE_MAX_ENTRIES; ++i) { rc = role_table_register_nostr_index(&table, i); check_condition("fill table via register_nostr_index returns 0", rc == 0); } rc = role_table_register_nostr_index(&table, ROLE_TABLE_MAX_ENTRIES + 7); check_condition("register_nostr_index table full returns -1", rc == -1); if (g_failures == 0) { printf("ALL TESTS PASSED\n"); return 0; } printf("TESTS FAILED: %d\n", g_failures); return 1; }