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Diffstat (limited to 'openssl/crypto/evp/e_aes.c')
| -rw-r--r-- | openssl/crypto/evp/e_aes.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_aes.c b/openssl/crypto/evp/e_aes.c new file mode 100644 index 00000000..bd6c0a3a --- /dev/null +++ b/openssl/crypto/evp/e_aes.c @@ -0,0 +1,120 @@ +/* ==================================================================== + * Copyright (c) 2001 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + */ + +#include <openssl/opensslconf.h> +#ifndef OPENSSL_NO_AES +#include <openssl/evp.h> +#include <openssl/err.h> +#include <string.h> +#include <assert.h> +#include <openssl/aes.h> +#include "evp_locl.h" + +static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc); + +typedef struct + { + AES_KEY ks; + } EVP_AES_KEY; + +#define data(ctx) EVP_C_DATA(EVP_AES_KEY,ctx) + +IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY, + NID_aes_128, 16, 16, 16, 128, + 0, aes_init_key, NULL, + EVP_CIPHER_set_asn1_iv, + EVP_CIPHER_get_asn1_iv, + NULL) +IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY, + NID_aes_192, 16, 24, 16, 128, + 0, aes_init_key, NULL, + EVP_CIPHER_set_asn1_iv, + EVP_CIPHER_get_asn1_iv, + NULL) +IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY, + NID_aes_256, 16, 32, 16, 128, + 0, aes_init_key, NULL, + EVP_CIPHER_set_asn1_iv, + EVP_CIPHER_get_asn1_iv, + NULL) + +#define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16) + +IMPLEMENT_AES_CFBR(128,1) +IMPLEMENT_AES_CFBR(192,1) +IMPLEMENT_AES_CFBR(256,1) + +IMPLEMENT_AES_CFBR(128,8) +IMPLEMENT_AES_CFBR(192,8) +IMPLEMENT_AES_CFBR(256,8) + +static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + int ret; + + if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE + || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE + || enc) + ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data); + else + ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data); + + if(ret < 0) + { + EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED); + return 0; + } + + return 1; + } + +#endif |