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- /*
- * Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the License); you may
- * not use this file except in compliance with the License.
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- */
- /* NIST SP800-90A Rev.1 "Recommendation for Random Number Generation
- * Using Deterministic Random Bit Generators", 10.1.1 Hash_DRBG */
- #ifndef GMSSL_HASH_DRBG_H
- #define GMSSL_HASH_DRBG_H
- #include <stdint.h>
- #include <stdlib.h>
- #include <gmssl/digest.h>
- /* seedlen for hash_drgb, table 2 of nist sp 800-90a rev.1 */
- #define HASH_DRBG_SM3_SEED_BITS 440 /* 55 bytes */
- #define HASH_DRBG_SHA1_SEED_BITS 440
- #define HASH_DRBG_SHA224_SEED_BITS 440
- #define HASH_DRBG_SHA512_224_SEED_BITS 440
- #define HASH_DRBG_SHA256_SEED_BITS 440
- #define HASH_DRBG_SHA512_256_SEED_BITS 440
- #define HASH_DRBG_SHA384_SEED_BITS 888 /* 110 bytes */
- #define HASH_DRBG_SHA512_SEED_BITS 888
- #define HASH_DRBG_MAX_SEED_BITS 888
- #define HASH_DRBG_SM3_SEED_SIZE (HASH_DRBG_SM3_SEED_BITS/8)
- #define HASH_DRBG_SHA1_SEED_SIZE (HASH_DRBG_SHA1_SEED_BITS/8)
- #define HASH_DRBG_SHA224_SEED_SIZE (HASH_DRBG_SHA224_SEED_BITS/8)
- #define HASH_DRBG_SHA512_224_SEED_SIZE (HASH_DRBG_SHA512_224_SEED_BITS/8)
- #define HASH_DRBG_SHA256_SEED_SIZE (HASH_DRBG_SHA256_SEED_BITS/8)
- #define HASH_DRBG_SHA512_256_SEED_SIZE (HASH_DRBG_SHA512_256_SEED_BITS/8)
- #define HASH_DRBG_SHA384_SEED_SIZE (HASH_DRBG_SHA384_SEED_BITS/8)
- #define HASH_DRBG_SHA512_SEED_SIZE (HASH_DRBG_SHA512_SEED_BITS/8)
- #define HASH_DRBG_MAX_SEED_SIZE (HASH_DRBG_MAX_SEED_BITS/8)
- #define HASH_DRBG_RESEED_INTERVAL ((uint64_t)1 << 48)
- #ifdef __cplusplus
- extern "C" {
- #endif
- typedef struct {
- const DIGEST *digest;
- uint8_t V[HASH_DRBG_MAX_SEED_SIZE];
- uint8_t C[HASH_DRBG_MAX_SEED_SIZE];
- size_t seedlen;
- uint64_t reseed_counter;
- } HASH_DRBG;
- int hash_drbg_init(HASH_DRBG *drbg,
- const DIGEST *digest,
- const uint8_t *entropy, size_t entropy_len,
- const uint8_t *nonce, size_t nonce_len,
- const uint8_t *personalstr, size_t personalstr_len);
- int hash_drbg_reseed(HASH_DRBG *drbg,
- const uint8_t *entropy, size_t entropy_len,
- const uint8_t *additional, size_t additional_len);
- int hash_drbg_generate(HASH_DRBG *drbg,
- const uint8_t *additional, size_t additional_len,
- size_t outlen, uint8_t *out);
- #ifdef __cplusplus
- }
- #endif
- #endif
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