diff options
Diffstat (limited to 'openssl/crypto/evp/e_xcbc_d.c')
| -rw-r--r-- | openssl/crypto/evp/e_xcbc_d.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_xcbc_d.c b/openssl/crypto/evp/e_xcbc_d.c new file mode 100644 index 00000000..250e88c8 --- /dev/null +++ b/openssl/crypto/evp/e_xcbc_d.c @@ -0,0 +1,138 @@ +/* crypto/evp/e_xcbc_d.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * 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 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 acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS 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 AUTHOR OR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include "cryptlib.h" + +#ifndef OPENSSL_NO_DES + +#include <openssl/evp.h> +#include <openssl/objects.h> +#include "evp_locl.h" +#include <openssl/des.h> + +static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv,int enc); +static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl); + + +typedef struct + { + DES_key_schedule ks;/* key schedule */ + DES_cblock inw; + DES_cblock outw; + } DESX_CBC_KEY; + +#define data(ctx) ((DESX_CBC_KEY *)(ctx)->cipher_data) + +static const EVP_CIPHER d_xcbc_cipher= + { + NID_desx_cbc, + 8,24,8, + EVP_CIPH_CBC_MODE, + desx_cbc_init_key, + desx_cbc_cipher, + NULL, + sizeof(DESX_CBC_KEY), + EVP_CIPHER_set_asn1_iv, + EVP_CIPHER_get_asn1_iv, + NULL, + NULL + }; + +const EVP_CIPHER *EVP_desx_cbc(void) + { + return(&d_xcbc_cipher); + } + +static int desx_cbc_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + DES_cblock *deskey = (DES_cblock *)key; + + DES_set_key_unchecked(deskey,&data(ctx)->ks); + memcpy(&data(ctx)->inw[0],&key[8],8); + memcpy(&data(ctx)->outw[0],&key[16],8); + + return 1; + } + +static int desx_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t inl) + { + while (inl>=EVP_MAXCHUNK) + { + DES_xcbc_encrypt(in,out,(long)EVP_MAXCHUNK,&data(ctx)->ks, + (DES_cblock *)&(ctx->iv[0]), + &data(ctx)->inw, + &data(ctx)->outw, + ctx->encrypt); + inl-=EVP_MAXCHUNK; + in +=EVP_MAXCHUNK; + out+=EVP_MAXCHUNK; + } + if (inl) + DES_xcbc_encrypt(in,out,(long)inl,&data(ctx)->ks, + (DES_cblock *)&(ctx->iv[0]), + &data(ctx)->inw, + &data(ctx)->outw, + ctx->encrypt); + return 1; + } +#endif |