42 lines
1.7 KiB
C
42 lines
1.7 KiB
C
/**********************************************************************
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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_H
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#define SECP256K1_HASH_H
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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[8];
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uint32_t buf[16]; /* In big endian */
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size_t bytes;
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} secp256k1_sha256;
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static void secp256k1_sha256_initialize(secp256k1_sha256 *hash);
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static void secp256k1_sha256_write(secp256k1_sha256 *hash, const unsigned char *data, size_t size);
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static void secp256k1_sha256_finalize(secp256k1_sha256 *hash, unsigned char *out32);
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typedef struct {
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secp256k1_sha256 inner, outer;
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} secp256k1_hmac_sha256;
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static void secp256k1_hmac_sha256_initialize(secp256k1_hmac_sha256 *hash, const unsigned char *key, size_t size);
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static void secp256k1_hmac_sha256_write(secp256k1_hmac_sha256 *hash, const unsigned char *data, size_t size);
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static void secp256k1_hmac_sha256_finalize(secp256k1_hmac_sha256 *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;
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static void secp256k1_rfc6979_hmac_sha256_initialize(secp256k1_rfc6979_hmac_sha256 *rng, const unsigned char *key, size_t keylen);
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static void secp256k1_rfc6979_hmac_sha256_generate(secp256k1_rfc6979_hmac_sha256 *rng, unsigned char *out, size_t outlen);
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static void secp256k1_rfc6979_hmac_sha256_finalize(secp256k1_rfc6979_hmac_sha256 *rng);
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#endif /* SECP256K1_HASH_H */
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