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src/secp256k1/include/secp256k1_schnorrsig.h
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| * schnorrsig_sign does not produce BIP-340 compliant signatures. The algo16 | * schnorrsig_sign does not produce BIP-340 compliant signatures. The algo16 | ||||
| * argument must be non-NULL, otherwise the function will fail and return 0. | * argument must be non-NULL, otherwise the function will fail and return 0. | ||||
| * The hash will be tagged with algo16 after removing all terminating null | * The hash will be tagged with algo16 after removing all terminating null | ||||
| * bytes. Therefore, to create BIP-340 compliant signatures, algo16 must be set | * bytes. Therefore, to create BIP-340 compliant signatures, algo16 must be set | ||||
| * to "BIP0340/nonce\0\0\0" | * to "BIP0340/nonce\0\0\0" | ||||
| */ | */ | ||||
| SECP256K1_API extern const secp256k1_nonce_function_hardened secp256k1_nonce_function_bip340; | SECP256K1_API extern const secp256k1_nonce_function_hardened secp256k1_nonce_function_bip340; | ||||
| /** Create a Schnorr signature. | |||||
| * | |||||
| * Does _not_ strictly follow BIP-340 because it does not verify the resulting | |||||
| * signature. Instead, you can manually use secp256k1_schnorrsig_verify and | |||||
| * abort if it fails. | |||||
| * | |||||
| * Otherwise BIP-340 compliant if the noncefp argument is NULL or | |||||
| * secp256k1_nonce_function_bip340 and the ndata argument is 32-byte auxiliary | |||||
| * randomness. | |||||
| * | |||||
| * Returns 1 on success, 0 on failure. | |||||
| * Args: ctx: pointer to a context object, initialized for signing (cannot be NULL) | |||||
| * Out: sig64: pointer to a 64-byte array to store the serialized signature (cannot be NULL) | |||||
| * In: msg32: the 32-byte message being signed (cannot be NULL) | |||||
| * keypair: pointer to an initialized keypair (cannot be NULL) | |||||
| * noncefp: pointer to a nonce generation function. If NULL, secp256k1_nonce_function_bip340 is used | |||||
| * ndata: pointer to arbitrary data used by the nonce generation | |||||
| * function (can be NULL). If it is non-NULL and | |||||
| * secp256k1_nonce_function_bip340 is used, then ndata must be a | |||||
| * pointer to 32-byte auxiliary randomness as per BIP-340. | |||||
| */ | |||||
| SECP256K1_API int secp256k1_schnorrsig_sign( | |||||
| const secp256k1_context* ctx, | |||||
| unsigned char *sig64, | |||||
| const unsigned char *msg32, | |||||
| const secp256k1_keypair *keypair, | |||||
| secp256k1_nonce_function_hardened noncefp, | |||||
| void *ndata | |||||
| ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4); | |||||
| /** Verify a Schnorr signature. | |||||
| * | |||||
| * Returns: 1: correct signature | |||||
| * 0: incorrect signature | |||||
| * Args: ctx: a secp256k1 context object, initialized for verification. | |||||
| * In: sig64: pointer to the 64-byte signature to verify (cannot be NULL) | |||||
| * msg32: the 32-byte message being verified (cannot be NULL) | |||||
| * pubkey: pointer to an x-only public key to verify with (cannot be NULL) | |||||
| */ | |||||
| SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_schnorrsig_verify( | |||||
| const secp256k1_context* ctx, | |||||
| const unsigned char *sig64, | |||||
| const unsigned char *msg32, | |||||
| const secp256k1_xonly_pubkey *pubkey | |||||
| ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4); | |||||
| #ifdef __cplusplus | #ifdef __cplusplus | ||||
| } | } | ||||
| #endif | #endif | ||||
| #endif /* SECP256K1_SCHNORRSIG_H */ | #endif /* SECP256K1_SCHNORRSIG_H */ | ||||