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42 lines
1.8 KiB
42 lines
1.8 KiB
10 years ago
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/**********************************************************************
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* Copyright (c) 2014 Pieter Wuille *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
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**********************************************************************/
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#ifndef _SECP256K1_HASH_
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#define _SECP256K1_HASH_
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#include <stdlib.h>
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#include <stdint.h>
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typedef struct {
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uint32_t s[32];
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uint32_t buf[16]; /* In big endian */
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size_t bytes;
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} secp256k1_sha256_t;
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static void secp256k1_sha256_initialize(secp256k1_sha256_t *hash);
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static void secp256k1_sha256_write(secp256k1_sha256_t *hash, const unsigned char *data, size_t size);
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static void secp256k1_sha256_finalize(secp256k1_sha256_t *hash, unsigned char *out32);
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typedef struct {
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secp256k1_sha256_t inner, outer;
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} secp256k1_hmac_sha256_t;
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static void secp256k1_hmac_sha256_initialize(secp256k1_hmac_sha256_t *hash, const unsigned char *key, size_t size);
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static void secp256k1_hmac_sha256_write(secp256k1_hmac_sha256_t *hash, const unsigned char *data, size_t size);
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static void secp256k1_hmac_sha256_finalize(secp256k1_hmac_sha256_t *hash, unsigned char *out32);
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typedef struct {
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unsigned char v[32];
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unsigned char k[32];
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int retry;
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} secp256k1_rfc6979_hmac_sha256_t;
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static void secp256k1_rfc6979_hmac_sha256_initialize(secp256k1_rfc6979_hmac_sha256_t *rng, const unsigned char *key, size_t keylen, const unsigned char *msg, size_t msglen, const unsigned char *rnd, size_t rndlen);
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static void secp256k1_rfc6979_hmac_sha256_generate(secp256k1_rfc6979_hmac_sha256_t *rng, unsigned char *out, size_t outlen);
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static void secp256k1_rfc6979_hmac_sha256_finalize(secp256k1_rfc6979_hmac_sha256_t *rng);
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#endif
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