mirror of
https://github.com/ossrs/srs.git
synced 2025-03-09 15:49:59 +00:00
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*
|
|
* Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
|
|
* Copyright 2017 Ribose Inc. All Rights Reserved.
|
|
* Ported from Ribose contributions from Botan.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include "internal/cryptlib.h"
|
|
#ifndef OPENSSL_NO_SM4
|
|
# include <openssl/evp.h>
|
|
# include <openssl/modes.h>
|
|
# include "crypto/sm4.h"
|
|
# include "crypto/evp.h"
|
|
|
|
typedef struct {
|
|
SM4_KEY ks;
|
|
} EVP_SM4_KEY;
|
|
|
|
static int sm4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
SM4_set_key(key, EVP_CIPHER_CTX_get_cipher_data(ctx));
|
|
return 1;
|
|
}
|
|
|
|
static void sm4_cbc_encrypt(const unsigned char *in, unsigned char *out,
|
|
size_t len, const SM4_KEY *key,
|
|
unsigned char *ivec, const int enc)
|
|
{
|
|
if (enc)
|
|
CRYPTO_cbc128_encrypt(in, out, len, key, ivec,
|
|
(block128_f)SM4_encrypt);
|
|
else
|
|
CRYPTO_cbc128_decrypt(in, out, len, key, ivec,
|
|
(block128_f)SM4_decrypt);
|
|
}
|
|
|
|
static void sm4_cfb128_encrypt(const unsigned char *in, unsigned char *out,
|
|
size_t length, const SM4_KEY *key,
|
|
unsigned char *ivec, int *num, const int enc)
|
|
{
|
|
CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,
|
|
(block128_f)SM4_encrypt);
|
|
}
|
|
|
|
static void sm4_ecb_encrypt(const unsigned char *in, unsigned char *out,
|
|
const SM4_KEY *key, const int enc)
|
|
{
|
|
if (enc)
|
|
SM4_encrypt(in, out, key);
|
|
else
|
|
SM4_decrypt(in, out, key);
|
|
}
|
|
|
|
static void sm4_ofb128_encrypt(const unsigned char *in, unsigned char *out,
|
|
size_t length, const SM4_KEY *key,
|
|
unsigned char *ivec, int *num)
|
|
{
|
|
CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num,
|
|
(block128_f)SM4_encrypt);
|
|
}
|
|
|
|
IMPLEMENT_BLOCK_CIPHER(sm4, ks, sm4, EVP_SM4_KEY, NID_sm4,
|
|
16, 16, 16, 128, EVP_CIPH_FLAG_DEFAULT_ASN1,
|
|
sm4_init_key, 0, 0, 0, 0)
|
|
|
|
static int sm4_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t len)
|
|
{
|
|
unsigned int num = EVP_CIPHER_CTX_num(ctx);
|
|
EVP_SM4_KEY *dat = EVP_C_DATA(EVP_SM4_KEY, ctx);
|
|
|
|
CRYPTO_ctr128_encrypt(in, out, len, &dat->ks,
|
|
EVP_CIPHER_CTX_iv_noconst(ctx),
|
|
EVP_CIPHER_CTX_buf_noconst(ctx), &num,
|
|
(block128_f)SM4_encrypt);
|
|
EVP_CIPHER_CTX_set_num(ctx, num);
|
|
return 1;
|
|
}
|
|
|
|
static const EVP_CIPHER sm4_ctr_mode = {
|
|
NID_sm4_ctr, 1, 16, 16,
|
|
EVP_CIPH_CTR_MODE,
|
|
sm4_init_key,
|
|
sm4_ctr_cipher,
|
|
NULL,
|
|
sizeof(EVP_SM4_KEY),
|
|
NULL, NULL, NULL, NULL
|
|
};
|
|
|
|
const EVP_CIPHER *EVP_sm4_ctr(void)
|
|
{
|
|
return &sm4_ctr_mode;
|
|
}
|
|
|
|
#endif
|