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/* 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 <openssl/cipher.h>
#include <openssl/des.h>
#include <openssl/obj.h>
#include "internal.h"
#define EVP_MAXCHUNK (1<<30)
typedef struct {
union {
double align;
DES_key_schedule ks;
} ks;
} EVP_DES_KEY;
static int des_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
const uint8_t *iv, int enc) {
DES_cblock *deskey = (DES_cblock *)key;
EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data;
DES_set_key(deskey, &dat->ks.ks);
return 1;
}
static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
size_t in_len) {
EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data;
while (in_len >= EVP_MAXCHUNK) {
DES_ncbc_encrypt(in, out, EVP_MAXCHUNK, &dat->ks.ks, (DES_cblock *)ctx->iv,
ctx->encrypt);
in_len -= EVP_MAXCHUNK;
in += EVP_MAXCHUNK;
out += EVP_MAXCHUNK;
}
if (in_len) {
DES_ncbc_encrypt(in, out, (long)in_len, &dat->ks.ks,
(DES_cblock *)ctx->iv, ctx->encrypt);
}
return 1;
}
static const EVP_CIPHER des_cbc = {
NID_des_cbc, 8 /* block_size */, 8 /* key_size */,
8 /* iv_len */, sizeof(EVP_DES_KEY), EVP_CIPH_CBC_MODE,
NULL /* app_data */, des_init_key, des_cbc_cipher,
NULL /* cleanup */, NULL /* ctrl */, };
const EVP_CIPHER *EVP_des_cbc(void) { return &des_cbc; }
typedef struct {
union {
double align;
DES_key_schedule ks[3];
} ks;
} DES_EDE_KEY;
static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
const uint8_t *iv, int enc) {
DES_cblock *deskey = (DES_cblock *)key;
DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data;
DES_set_key(&deskey[0], &dat->ks.ks[0]);
DES_set_key(&deskey[1], &dat->ks.ks[1]);
DES_set_key(&deskey[2], &dat->ks.ks[2]);
return 1;
}
static int des_ede3_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
const uint8_t *in, size_t in_len) {
DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data;
while (in_len >= EVP_MAXCHUNK) {
DES_ede3_cbc_encrypt(in, out, EVP_MAXCHUNK, &dat->ks.ks[0], &dat->ks.ks[1],
&dat->ks.ks[2], (DES_cblock *)ctx->iv, ctx->encrypt);
in_len -= EVP_MAXCHUNK;
in += EVP_MAXCHUNK;
out += EVP_MAXCHUNK;
}
if (in_len) {
DES_ede3_cbc_encrypt(in, out, in_len, &dat->ks.ks[0], &dat->ks.ks[1],
&dat->ks.ks[2], (DES_cblock *)ctx->iv, ctx->encrypt);
}
return 1;
}
static const EVP_CIPHER des3_cbc = {
NID_des_cbc, 8 /* block_size */, 24 /* key_size */,
8 /* iv_len */, sizeof(DES_EDE_KEY), EVP_CIPH_CBC_MODE,
NULL /* app_data */, des_ede3_init_key, des_ede3_cbc_cipher,
NULL /* cleanup */, NULL /* ctrl */, };
const EVP_CIPHER *EVP_des_ede3_cbc(void) { return &des3_cbc; }