e_des.c
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- /* crypto/evp/e_des.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>
- #include <openssl/rand.h>
- static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
- const unsigned char *iv, int enc);
- static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
- /* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */
- static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl)
- {
- BLOCK_CIPHER_ecb_loop()
- DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), ctx->cipher_data, ctx->encrypt);
- return 1;
- }
- static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl)
- {
- DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, &ctx->num);
- return 1;
- }
- static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl)
- {
- DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data,
- (DES_cblock *)ctx->iv, ctx->encrypt);
- return 1;
- }
- static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl)
- {
- DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data,
- (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
- return 1;
- }
- /* Although we have a CFB-r implementation for DES, it doesn't pack the right
- way, so wrap it here */
- static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl)
- {
- unsigned int n;
- unsigned char c[1],d[1];
- for(n=0 ; n < inl ; ++n)
- {
- c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0;
- DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv,
- ctx->encrypt);
- out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8));
- }
- return 1;
- }
- static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl)
- {
- DES_cfb_encrypt(in,out,8,inl,ctx->cipher_data,(DES_cblock *)ctx->iv,
- ctx->encrypt);
- return 1;
- }
- BLOCK_CIPHER_defs(des, DES_key_schedule, NID_des, 8, 8, 8, 64,
- EVP_CIPH_RAND_KEY, des_init_key, NULL,
- EVP_CIPHER_set_asn1_iv,
- EVP_CIPHER_get_asn1_iv,
- des_ctrl)
- BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,1,
- EVP_CIPH_RAND_KEY, des_init_key,NULL,
- EVP_CIPHER_set_asn1_iv,
- EVP_CIPHER_get_asn1_iv,des_ctrl)
- BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,8,
- EVP_CIPH_RAND_KEY,des_init_key,NULL,
- EVP_CIPHER_set_asn1_iv,
- EVP_CIPHER_get_asn1_iv,des_ctrl)
- static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
- const unsigned char *iv, int enc)
- {
- DES_cblock *deskey = (DES_cblock *)key;
- #ifdef EVP_CHECK_DES_KEY
- if(DES_set_key_checked(deskey,ctx->cipher_data) != 0)
- return 0;
- #else
- DES_set_key_unchecked(deskey,ctx->cipher_data);
- #endif
- return 1;
- }
- static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
- {
-
- switch(type)
- {
- case EVP_CTRL_RAND_KEY:
- if (RAND_bytes(ptr, 8) <= 0)
- return 0;
- DES_set_odd_parity((DES_cblock *)ptr);
- return 1;
- default:
- return -1;
- }
- }
- #endif