Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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/* 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>
# ifndef OPENSSL_FIPS
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)
{
while (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;
fprintf(stderr, "des_ede_cbc_cipher(ctx=%p, buflen=%d)\n", ctx,
ctx->buf_len);
fprintf(stderr, "\t iv= ");
for (i = 0; i < 8; i++)
fprintf(stderr, "%02X", ctx->iv[i]);
fprintf(stderr, "\n");
}
# endif /* KSSL_DEBUG */
while (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)
{
while (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;
fprintf(stderr, "des_ede3_init_key(ctx=%p)\n", ctx);
fprintf(stderr, "\tKEY= ");
for (i = 0; i < 24; i++)
fprintf(stderr, "%02X", key[i]);
fprintf(stderr, "\n");
if (iv) {
fprintf(stderr, "\t IV= ");
for (i = 0; i < 8; i++)
fprintf(stderr, "%02X", iv[i]);
fprintf(stderr, "\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
#endif