/* crypto/evp/e_des3.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_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv,int enc);
static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv,int enc);
static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
typedef struct
{
DES_key_schedule ks1;/* key schedule */
DES_key_schedule ks2;/* key schedule (for ede) */
DES_key_schedule ks3;/* key schedule (for ede3) */
} DES_EDE_KEY;
#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
/* Because of various casts and different args can't use IMPLEMENT_BLOCK_CIPHER */
static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
BLOCK_CIPHER_ecb_loop()
DES_ecb3_encrypt((const_DES_cblock *)(in + i),
(DES_cblock *)(out + i),
&data(ctx)->ks1, &data(ctx)->ks2,
&data(ctx)->ks3,
ctx->encrypt);
return 1;
}
static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
if (inl>=EVP_MAXCHUNK)
{
DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
(DES_cblock *)ctx->iv, &ctx->num);
inl-=EVP_MAXCHUNK;
in +=EVP_MAXCHUNK;
out+=EVP_MAXCHUNK;
}
if (inl)
DES_ede3_ofb64_encrypt(in, out, (long)inl,
&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
(DES_cblock *)ctx->iv, &ctx->num);
return 1;
}
static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
#ifdef KSSL_DEBUG
{
int i;
char *cp;
printf("des_ede_cbc_cipher(ctx=%lx, buflen=%d)\n", ctx, ctx->buf_len);
printf("\t iv= ");
for(i=0;i<8;i++)
printf("%02X",ctx->iv[i]);
printf("\n");
}
#endif /* KSSL_DEBUG */
if (inl>=EVP_MAXCHUNK)
{
DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
(DES_cblock *)ctx->iv, ctx->encrypt);
inl-=EVP_MAXCHUNK;
in +=EVP_MAXCHUNK;
out+=EVP_MAXCHUNK;
}
if (inl)
DES_ede3_cbc_encrypt(in, out, (long)inl,
&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
(DES_cblock *)ctx->iv, ctx->encrypt);
return 1;
}
static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
if (inl>=EVP_MAXCHUNK)
{
DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
(DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
inl-=EVP_MAXCHUNK;
in +=EVP_MAXCHUNK;
out+=EVP_MAXCHUNK;
}
if (inl)
DES_ede3_cfb64_encrypt(in, out, (long)inl,
&data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
(DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
return 1;
}
/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
way, so wrap it here */
static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
size_t 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_ede3_cfb_encrypt(c,d,1,1,
&data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
(DES_cblock *)ctx->iv,ctx->encrypt);
out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) |
((d[0]&0x80) >> (unsigned int)(n%8));
}
return 1;
}
static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
while (inl>=EVP_MAXCHUNK)
{
DES_ede3_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,
&data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
(DES_cblock *)ctx->iv,ctx->encrypt);
inl-=EVP_MAXCHUNK;
in +=EVP_MAXCHUNK;
out+=EVP_MAXCHUNK;
}
if (inl)
DES_ede3_cfb_encrypt(in,out,8,(long)inl,
&data(ctx)->ks1,&data(ctx)->ks2,&data(ctx)->ks3,
(DES_cblock *)ctx->iv,ctx->encrypt);
return 1;
}
BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
EVP_CIPH_RAND_KEY, des_ede_init_key, NULL,
EVP_CIPHER_set_asn1_iv,
EVP_CIPHER_get_asn1_iv,
des3_ctrl)
#define des_ede3_cfb64_cipher des_ede_cfb64_cipher
#define des_ede3_ofb_cipher des_ede_ofb_cipher
#define des_ede3_cbc_cipher des_ede_cbc_cipher
#define des_ede3_ecb_cipher des_ede_ecb_cipher
BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
EVP_CIPH_RAND_KEY, des_ede3_init_key, NULL,
EVP_CIPHER_set_asn1_iv,
EVP_CIPHER_get_asn1_iv,
des3_ctrl)
BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,1,
EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
EVP_CIPHER_set_asn1_iv,
EVP_CIPHER_get_asn1_iv,
des3_ctrl)
BLOCK_CIPHER_def_cfb(des_ede3,DES_EDE_KEY,NID_des_ede3,24,8,8,
EVP_CIPH_RAND_KEY, des_ede3_init_key,NULL,
EVP_CIPHER_set_asn1_iv,
EVP_CIPHER_get_asn1_iv,
des3_ctrl)
static int des_ede_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[0],&data(ctx)->ks1)
!! DES_set_key_checked(&deskey[1],&data(ctx)->ks2))
return 0;
#else
DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
#endif
memcpy(&data(ctx)->ks3,&data(ctx)->ks1,
sizeof(data(ctx)->ks1));
return 1;
}
static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
DES_cblock *deskey = (DES_cblock *)key;
#ifdef KSSL_DEBUG
{
int i;
printf("des_ede3_init_key(ctx=%lx)\n", ctx);
printf("\tKEY= ");
for(i=0;i<24;i++) printf("%02X",key[i]); printf("\n");
printf("\t IV= ");
for(i=0;i<8;i++) printf("%02X",iv[i]); printf("\n");
}
#endif /* KSSL_DEBUG */
#ifdef EVP_CHECK_DES_KEY
if (DES_set_key_checked(&deskey[0],&data(ctx)->ks1)
|| DES_set_key_checked(&deskey[1],&data(ctx)->ks2)
|| DES_set_key_checked(&deskey[2],&data(ctx)->ks3))
return 0;
#else
DES_set_key_unchecked(&deskey[0],&data(ctx)->ks1);
DES_set_key_unchecked(&deskey[1],&data(ctx)->ks2);
DES_set_key_unchecked(&deskey[2],&data(ctx)->ks3);
#endif
return 1;
}
static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
{
DES_cblock *deskey = ptr;
switch(type)
{
case EVP_CTRL_RAND_KEY:
if (RAND_bytes(ptr, c->key_len) <= 0)
return 0;
DES_set_odd_parity(deskey);
if (c->key_len >= 16)
DES_set_odd_parity(deskey + 1);
if (c->key_len >= 24)
DES_set_odd_parity(deskey + 2);
return 1;
default:
return -1;
}
}
const EVP_CIPHER *EVP_des_ede(void)
{
return &des_ede_ecb;
}
const EVP_CIPHER *EVP_des_ede3(void)
{
return &des_ede3_ecb;
}
#endif