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add sdf and skf

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This commit is contained in:
Zhi Guan
2021-08-03 17:09:35 +08:00
parent d6feba3749
commit a57193836b
71 changed files with 11100 additions and 765 deletions
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22
src/sm3_hmac.c
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@@ -110,26 +110,7 @@ void sm3_hmac_finish(SM3_HMAC_CTX *ctx, uint8_t mac[SM3_HMAC_SIZE])
sm3_update(&ctx->sm3_ctx, ctx->key, SM3_BLOCK_SIZE);
sm3_update(&ctx->sm3_ctx, mac, SM3_DIGEST_SIZE);
sm3_finish(&ctx->sm3_ctx, mac);
}
int sm3_hmac_finish_and_verify(SM3_HMAC_CTX *ctx, const uint8_t mac[SM3_HMAC_SIZE])
{
uint8_t buf[32];
sm3_hmac_finish(ctx, buf);
if (memcmp(mac, buf, sizeof(buf)) == 0) {
return 1;
} else {
error_print("sm3_hmac verify failure");
return 0;
}
}
void sm3_hmac_reset(SM3_HMAC_CTX *ctx)
{
sm3_init(&ctx->sm3_ctx);
sm3_update(&ctx->sm3_ctx, ctx->key, SM3_BLOCK_SIZE);
// 不应该保留原始密钥，而是应该保持这次update之后的状态
// 这样可以降低reset的工作量
memset(ctx, 0, sizeof(*ctx));
}
void sm3_hmac(const uint8_t *data, size_t data_len,
@@ -140,5 +121,4 @@ void sm3_hmac(const uint8_t *data, size_t data_len,
sm3_hmac_init(&ctx, key, key_len);
sm3_hmac_update(&ctx, data, data_len);
sm3_hmac_finish(&ctx, mac);
memset(&ctx, 0, sizeof(ctx));
}