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