44 lines
974 B
C
44 lines
974 B
C
/*
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* Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*/
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#ifndef GMSSL_SM4_RNG_H
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#define GMSSL_SM4_RNG_H
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#include <time.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SM4_RNG_MAX_RESEED_COUNTER (1<<20)
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#define SM4_RNG_MAX_RESEED_SECONDS 600
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typedef struct {
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uint8_t V[16];
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uint8_t K[16];
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uint32_t reseed_counter;
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time_t last_reseed_time;
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} SM4_RNG;
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int sm4_rng_init(SM4_RNG *rng, const uint8_t *nonce, size_t nonce_len,
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const uint8_t *label, size_t label_len);
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int sm4_rng_update(SM4_RNG *rng, const uint8_t seed[32]);
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int sm4_rng_reseed(SM4_RNG *rng, const uint8_t *addin, size_t addin_len);
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int sm4_rng_generate(SM4_RNG *rng, const uint8_t *addin, size_t addin_len,
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uint8_t *out, size_t outlen);
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#ifdef __cplusplus
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}
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#endif
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#endif
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