176 lines
6.3 KiB
C
176 lines
6.3 KiB
C
/* 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 * 8; ++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
|