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author | Ronald Tse <ronald.tse@ribose.com> | 2017-10-31 15:19:14 +1000 |
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committer | Pauli <paul.dale@oracle.com> | 2017-10-31 15:19:14 +1000 |
commit | f19a5ff9ab85313f5b30cfc9fbed3a2eea60a59d (patch) | |
tree | e93336cc7c31d2a41e19b1c906135a6ec91cabfc /crypto/evp/e_sm4.c | |
parent | ffd23209933ea0ad5543f15ca6303d63d8dac826 (diff) | |
download | openssl-f19a5ff9ab85313f5b30cfc9fbed3a2eea60a59d.tar.gz |
SM4: Add SM4 block cipher to EVP
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/4552)
Diffstat (limited to 'crypto/evp/e_sm4.c')
-rw-r--r-- | crypto/evp/e_sm4.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/crypto/evp/e_sm4.c b/crypto/evp/e_sm4.c new file mode 100644 index 0000000000..79deb65636 --- /dev/null +++ b/crypto/evp/e_sm4.c @@ -0,0 +1,100 @@ +/* + * 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 "internal/sm4.h" +# include "internal/evp_int.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 |