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openssl/crypto/evp/e_des.c
Richard Levitte 6435f0f6c6 Adapt builtin cipher implementations to opaque EVP_CIPHER 
They all stop including evp_locl.h, so we also take care of their
adaptation to opaque EVP_CIPHER_CTX, as was promised in an earlier
commit.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-01-12 13:52:22 +01:00

278 lines
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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 "internal/cryptlib.h"
#ifndef OPENSSL_NO_DES
# include <openssl/evp.h>
# include <openssl/objects.h>
# include "internal/evp_int.h"
# include <openssl/des.h>
# include <openssl/rand.h>
typedef struct {
union {
double align;
DES_key_schedule ks;
} ks;
union {
void (*cbc) (const void *, void *, size_t, const void *, void *);
} stream;
} EVP_DES_KEY;
# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
/* ---------^^^ this is not a typo, just a way to detect that
* assembler support was in general requested... */
# include "sparc_arch.h"
extern unsigned int OPENSSL_sparcv9cap_P[];
# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
void des_t4_key_expand(const void *key, DES_key_schedule *ks);
void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
DES_key_schedule *ks, unsigned char iv[8]);
void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
DES_key_schedule *ks, unsigned char iv[8]);
# endif
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, size_t inl)
{
BLOCK_CIPHER_ecb_loop()
DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
EVP_CIPHER_CTX_cipher_data(ctx),
EVP_CIPHER_CTX_encrypting(ctx));
return 1;
}
static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
while (inl >= EVP_MAXCHUNK) {
int num = EVP_CIPHER_CTX_num(ctx);
DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num);
EVP_CIPHER_CTX_set_num(ctx, num);
inl -= EVP_MAXCHUNK;
in += EVP_MAXCHUNK;
out += EVP_MAXCHUNK;
}
if (inl) {
int num = EVP_CIPHER_CTX_num(ctx);
DES_ofb64_encrypt(in, out, (long)inl, EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num);
EVP_CIPHER_CTX_set_num(ctx, num);
}
return 1;
}
static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_cipher_data(ctx);
if (dat->stream.cbc) {
(*dat->stream.cbc) (in, out, inl, &dat->ks.ks, EVP_CIPHER_CTX_iv_noconst(ctx));
return 1;
}
while (inl >= EVP_MAXCHUNK) {
DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));
inl -= EVP_MAXCHUNK;
in += EVP_MAXCHUNK;
out += EVP_MAXCHUNK;
}
if (inl)
DES_ncbc_encrypt(in, out, (long)inl, EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));
return 1;
}
static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
while (inl >= EVP_MAXCHUNK) {
int num = EVP_CIPHER_CTX_num(ctx);
DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num,
EVP_CIPHER_CTX_encrypting(ctx));
EVP_CIPHER_CTX_set_num(ctx, num);
inl -= EVP_MAXCHUNK;
in += EVP_MAXCHUNK;
out += EVP_MAXCHUNK;
}
if (inl) {
int num = EVP_CIPHER_CTX_num(ctx);
DES_cfb64_encrypt(in, out, (long)inl, EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num,
EVP_CIPHER_CTX_encrypting(ctx));
EVP_CIPHER_CTX_set_num(ctx, num);
}
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, size_t inl)
{
size_t n, chunk = EVP_MAXCHUNK / 8;
unsigned char c[1], d[1];
if (inl < chunk)
chunk = inl;
while (inl && inl >= chunk) {
for (n = 0; n < chunk * 8; ++n) {
c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
DES_cfb_encrypt(c, d, 1, 1, EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));
out[n / 8] =
(out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
((d[0] & 0x80) >> (unsigned int)(n % 8));
}
inl -= chunk;
in += chunk;
out += chunk;
if (inl < chunk)
chunk = inl;
}
return 1;
}
static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t inl)
{
while (inl >= EVP_MAXCHUNK) {
DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK, EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));
inl -= EVP_MAXCHUNK;
in += EVP_MAXCHUNK;
out += EVP_MAXCHUNK;
}
if (inl)
DES_cfb_encrypt(in, out, 8, (long)inl, EVP_CIPHER_CTX_cipher_data(ctx),
(DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), EVP_CIPHER_CTX_encrypting(ctx));
return 1;
}
BLOCK_CIPHER_defs(des, EVP_DES_KEY, 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, EVP_DES_KEY, 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, EVP_DES_KEY, 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;
EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_cipher_data(ctx);
dat->stream.cbc = NULL;
# if defined(SPARC_DES_CAPABLE)
if (SPARC_DES_CAPABLE) {
int mode = ctx->cipher->flags & EVP_CIPH_MODE;
if (mode == EVP_CIPH_CBC_MODE) {
des_t4_key_expand(key, &dat->ks.ks);
dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
return 1;
}
}
# endif
DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_cipher_data(ctx));
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
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