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https://github.com/guanzhi/GmSSL.git
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85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*
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* Copyright 2014-2021 The GmSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* NIST SP800-90A Rev.1 "Recommendation for Random Number Generation
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* Using Deterministic Random Bit Generators", 10.1.1 Hash_DRBG */
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#ifndef GMSSL_HASH_DRBG_H
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#define GMSSL_HASH_DRBG_H
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#include <stdint.h>
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#include <stdlib.h>
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#include <gmssl/digest.h>
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/* seedlen for hash_drgb, table 2 of nist sp 800-90a rev.1 */
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#define HASH_DRBG_SM3_SEED_BITS 440 /* 55 bytes */
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#define HASH_DRBG_SHA1_SEED_BITS 440
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#define HASH_DRBG_SHA224_SEED_BITS 440
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#define HASH_DRBG_SHA512_224_SEED_BITS 440
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#define HASH_DRBG_SHA256_SEED_BITS 440
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#define HASH_DRBG_SHA512_256_SEED_BITS 440
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#define HASH_DRBG_SHA384_SEED_BITS 888 /* 110 bytes */
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#define HASH_DRBG_SHA512_SEED_BITS 888
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#define HASH_DRBG_MAX_SEED_BITS 888
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#define HASH_DRBG_SM3_SEED_SIZE (HASH_DRBG_SM3_SEED_BITS/8)
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#define HASH_DRBG_SHA1_SEED_SIZE (HASH_DRBG_SHA1_SEED_BITS/8)
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#define HASH_DRBG_SHA224_SEED_SIZE (HASH_DRBG_SHA224_SEED_BITS/8)
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#define HASH_DRBG_SHA512_224_SEED_SIZE (HASH_DRBG_SHA512_224_SEED_BITS/8)
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#define HASH_DRBG_SHA256_SEED_SIZE (HASH_DRBG_SHA256_SEED_BITS/8)
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#define HASH_DRBG_SHA512_256_SEED_SIZE (HASH_DRBG_SHA512_256_SEED_BITS/8)
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#define HASH_DRBG_SHA384_SEED_SIZE (HASH_DRBG_SHA384_SEED_BITS/8)
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#define HASH_DRBG_SHA512_SEED_SIZE (HASH_DRBG_SHA512_SEED_BITS/8)
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#define HASH_DRBG_MAX_SEED_SIZE (HASH_DRBG_MAX_SEED_BITS/8)
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#define HASH_DRBG_RESEED_INTERVAL ((uint64_t)1 << 48)
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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const DIGEST *digest;
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uint8_t V[HASH_DRBG_MAX_SEED_SIZE];
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uint8_t C[HASH_DRBG_MAX_SEED_SIZE];
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size_t seedlen;
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uint64_t reseed_counter;
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} HASH_DRBG;
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int hash_drbg_init(HASH_DRBG *drbg,
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const DIGEST *digest,
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const uint8_t *entropy, size_t entropy_len,
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const uint8_t *nonce, size_t nonce_len,
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const uint8_t *personalstr, size_t personalstr_len);
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int hash_drbg_reseed(HASH_DRBG *drbg,
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const uint8_t *entropy, size_t entropy_len,
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const uint8_t *additional, size_t additional_len);
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int hash_drbg_generate(HASH_DRBG *drbg,
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const uint8_t *additional, size_t additional_len,
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size_t outlen, uint8_t *out);
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#ifdef __cplusplus
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}
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#endif
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#endif
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