e_aes.c
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- /* ====================================================================
- * 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