mirror of
https://github.com/guanzhi/GmSSL.git
synced 2026-05-07 08:56:17 +08:00
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
|
|
* Copyright 2014-2023 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
|
|
*/
|
|
|
|
|
|
#include <string.h>
|
|
#include <gmssl/sm3.h>
|
|
#include <gmssl/error.h>
|
|
|
|
|
|
#define PUTU32(ptr,a) \
|
|
((ptr)[0] = (uint8_t)((a) >> 24), \
|
|
(ptr)[1] = (uint8_t)((a) >> 16), \
|
|
(ptr)[2] = (uint8_t)((a) >> 8), \
|
|
(ptr)[3] = (uint8_t)(a))
|
|
|
|
void sm3_kdf_init(SM3_KDF_CTX *ctx, size_t outlen)
|
|
{
|
|
sm3_init(&ctx->sm3_ctx);
|
|
ctx->outlen = outlen;
|
|
}
|
|
|
|
void sm3_kdf_update(SM3_KDF_CTX *ctx, const uint8_t *data, size_t datalen)
|
|
{
|
|
sm3_update(&ctx->sm3_ctx, data, datalen);
|
|
}
|
|
|
|
void sm3_kdf_finish(SM3_KDF_CTX *ctx, uint8_t *out)
|
|
{
|
|
SM3_CTX sm3_ctx;
|
|
size_t outlen = ctx->outlen;
|
|
uint8_t counter_be[4];
|
|
uint8_t dgst[SM3_DIGEST_SIZE];
|
|
uint32_t counter = 1;
|
|
size_t len;
|
|
|
|
while (outlen) {
|
|
PUTU32(counter_be, counter);
|
|
counter++;
|
|
|
|
sm3_ctx = ctx->sm3_ctx;
|
|
sm3_update(&sm3_ctx, counter_be, sizeof(counter_be));
|
|
sm3_finish(&sm3_ctx, dgst);
|
|
|
|
len = outlen < SM3_DIGEST_SIZE ? outlen : SM3_DIGEST_SIZE;
|
|
memcpy(out, dgst, len);
|
|
out += len;
|
|
outlen -= len;
|
|
}
|
|
|
|
memset(&sm3_ctx, 0, sizeof(SM3_CTX));
|
|
memset(dgst, 0, sizeof(dgst));
|
|
}
|
|
|
|
#if 0
|
|
// add until v3.2.0
|
|
void sm3_kdf(const uint8_t *in, size_t inlen, size_t outlen, uint8_t *out)
|
|
{
|
|
SM3_KDF_CTX ctx;
|
|
sm3_kdf_init(&ctx, outlen);
|
|
sm3_kdf_update(&ctx, in, inlen);
|
|
sm3_kdf_finish(&ctx, out);
|
|
memset(&ctx, 0, sizeof(ctx));
|
|
}
|
|
#endif
|