Implement DES (single-key ECB only for now).

This commit is contained in:
Dag-Erling Smørgrav 2017-03-18 17:12:16 +01:00
parent c671da9b1c
commit 700fa0718b
7 changed files with 2650 additions and 1 deletions

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@ -6,6 +6,7 @@ if CRYB_CIPHER
cryb_HEADERS += \
aes.h \
chacha.h \
des.h \
rc4.h \
salsa.h \
\

64
include/cryb/des.h Normal file
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@ -0,0 +1,64 @@
/*-
* Copyright (c) 2015-2016 Dag-Erling Smørgrav
* All rights reserved.
*
* 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 above 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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.
*/
#ifndef CRYB_DES_H_INCLUDED
#define CRYB_DES_H_INCLUDED
#ifndef CRYB_TO
#include <cryb/to.h>
#endif
#include <cryb/cipher.h>
CRYB_BEGIN
#define DES_BLOCK_LEN 8
#define des_cipher cryb_des_cipher
#define des_ctx cryb_des_ctx
#define des_init cryb_des_init
#define des_keystream cryb_des_keystream
#define des_encrypt cryb_des_encrypt
#define des_decrypt cryb_des_decrypt
#define des_finish cryb_des_finish
extern cipher_algorithm des_cipher;
typedef struct {
uint32_t sk[32];
} des_ctx;
void des_init(des_ctx *, cipher_mode mode, const uint8_t *, size_t);
size_t des_encrypt(des_ctx *, const void *, uint8_t *, size_t);
size_t des_decrypt(des_ctx *, const uint8_t *, void *, size_t);
void des_finish(des_ctx *);
CRYB_END
#endif

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@ -5,6 +5,7 @@ lib_LTLIBRARIES = libcryb-cipher.la
libcryb_cipher_la_SOURCES = \
cryb_aes.c \
cryb_chacha.c \
cryb_des.c \
cryb_rc4.c \
cryb_salsa.c \
\

409
lib/cipher/cryb_des.c Normal file
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@ -0,0 +1,409 @@
/*-
* Copyright (c) 2006-2007 Christophe Devine
* Copyright (c) 2017 Dag-Erling Smørgrav
* All rights reserved.
*
* 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 above 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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.
*/
#include "cryb/impl.h"
#include <stdint.h>
#include <string.h>
#include <cryb/bitwise.h>
#include <cryb/endian.h>
#include <cryb/memset_s.h>
#include <cryb/des.h>
/*
* Expanded DES S-boxes
*/
static const uint32_t sb1[64] = {
0x01010400, 0x00000000, 0x00010000, 0x01010404,
0x01010004, 0x00010404, 0x00000004, 0x00010000,
0x00000400, 0x01010400, 0x01010404, 0x00000400,
0x01000404, 0x01010004, 0x01000000, 0x00000004,
0x00000404, 0x01000400, 0x01000400, 0x00010400,
0x00010400, 0x01010000, 0x01010000, 0x01000404,
0x00010004, 0x01000004, 0x01000004, 0x00010004,
0x00000000, 0x00000404, 0x00010404, 0x01000000,
0x00010000, 0x01010404, 0x00000004, 0x01010000,
0x01010400, 0x01000000, 0x01000000, 0x00000400,
0x01010004, 0x00010000, 0x00010400, 0x01000004,
0x00000400, 0x00000004, 0x01000404, 0x00010404,
0x01010404, 0x00010004, 0x01010000, 0x01000404,
0x01000004, 0x00000404, 0x00010404, 0x01010400,
0x00000404, 0x01000400, 0x01000400, 0x00000000,
0x00010004, 0x00010400, 0x00000000, 0x01010004
};
static const uint32_t sb2[64] = {
0x80108020, 0x80008000, 0x00008000, 0x00108020,
0x00100000, 0x00000020, 0x80100020, 0x80008020,
0x80000020, 0x80108020, 0x80108000, 0x80000000,
0x80008000, 0x00100000, 0x00000020, 0x80100020,
0x00108000, 0x00100020, 0x80008020, 0x00000000,
0x80000000, 0x00008000, 0x00108020, 0x80100000,
0x00100020, 0x80000020, 0x00000000, 0x00108000,
0x00008020, 0x80108000, 0x80100000, 0x00008020,
0x00000000, 0x00108020, 0x80100020, 0x00100000,
0x80008020, 0x80100000, 0x80108000, 0x00008000,
0x80100000, 0x80008000, 0x00000020, 0x80108020,
0x00108020, 0x00000020, 0x00008000, 0x80000000,
0x00008020, 0x80108000, 0x00100000, 0x80000020,
0x00100020, 0x80008020, 0x80000020, 0x00100020,
0x00108000, 0x00000000, 0x80008000, 0x00008020,
0x80000000, 0x80100020, 0x80108020, 0x00108000
};
static const uint32_t sb3[64] = {
0x00000208, 0x08020200, 0x00000000, 0x08020008,
0x08000200, 0x00000000, 0x00020208, 0x08000200,
0x00020008, 0x08000008, 0x08000008, 0x00020000,
0x08020208, 0x00020008, 0x08020000, 0x00000208,
0x08000000, 0x00000008, 0x08020200, 0x00000200,
0x00020200, 0x08020000, 0x08020008, 0x00020208,
0x08000208, 0x00020200, 0x00020000, 0x08000208,
0x00000008, 0x08020208, 0x00000200, 0x08000000,
0x08020200, 0x08000000, 0x00020008, 0x00000208,
0x00020000, 0x08020200, 0x08000200, 0x00000000,
0x00000200, 0x00020008, 0x08020208, 0x08000200,
0x08000008, 0x00000200, 0x00000000, 0x08020008,
0x08000208, 0x00020000, 0x08000000, 0x08020208,
0x00000008, 0x00020208, 0x00020200, 0x08000008,
0x08020000, 0x08000208, 0x00000208, 0x08020000,
0x00020208, 0x00000008, 0x08020008, 0x00020200
};
static const uint32_t sb4[64] = {
0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802080, 0x00800081, 0x00800001, 0x00002001,
0x00000000, 0x00802000, 0x00802000, 0x00802081,
0x00000081, 0x00000000, 0x00800080, 0x00800001,
0x00000001, 0x00002000, 0x00800000, 0x00802001,
0x00000080, 0x00800000, 0x00002001, 0x00002080,
0x00800081, 0x00000001, 0x00002080, 0x00800080,
0x00002000, 0x00802080, 0x00802081, 0x00000081,
0x00800080, 0x00800001, 0x00802000, 0x00802081,
0x00000081, 0x00000000, 0x00000000, 0x00802000,
0x00002080, 0x00800080, 0x00800081, 0x00000001,
0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802081, 0x00000081, 0x00000001, 0x00002000,
0x00800001, 0x00002001, 0x00802080, 0x00800081,
0x00002001, 0x00002080, 0x00800000, 0x00802001,
0x00000080, 0x00800000, 0x00002000, 0x00802080
};
static const uint32_t sb5[64] = {
0x00000100, 0x02080100, 0x02080000, 0x42000100,
0x00080000, 0x00000100, 0x40000000, 0x02080000,
0x40080100, 0x00080000, 0x02000100, 0x40080100,
0x42000100, 0x42080000, 0x00080100, 0x40000000,
0x02000000, 0x40080000, 0x40080000, 0x00000000,
0x40000100, 0x42080100, 0x42080100, 0x02000100,
0x42080000, 0x40000100, 0x00000000, 0x42000000,
0x02080100, 0x02000000, 0x42000000, 0x00080100,
0x00080000, 0x42000100, 0x00000100, 0x02000000,
0x40000000, 0x02080000, 0x42000100, 0x40080100,
0x02000100, 0x40000000, 0x42080000, 0x02080100,
0x40080100, 0x00000100, 0x02000000, 0x42080000,
0x42080100, 0x00080100, 0x42000000, 0x42080100,
0x02080000, 0x00000000, 0x40080000, 0x42000000,
0x00080100, 0x02000100, 0x40000100, 0x00080000,
0x00000000, 0x40080000, 0x02080100, 0x40000100
};
static const uint32_t sb6[64] = {
0x20000010, 0x20400000, 0x00004000, 0x20404010,
0x20400000, 0x00000010, 0x20404010, 0x00400000,
0x20004000, 0x00404010, 0x00400000, 0x20000010,
0x00400010, 0x20004000, 0x20000000, 0x00004010,
0x00000000, 0x00400010, 0x20004010, 0x00004000,
0x00404000, 0x20004010, 0x00000010, 0x20400010,
0x20400010, 0x00000000, 0x00404010, 0x20404000,
0x00004010, 0x00404000, 0x20404000, 0x20000000,
0x20004000, 0x00000010, 0x20400010, 0x00404000,
0x20404010, 0x00400000, 0x00004010, 0x20000010,
0x00400000, 0x20004000, 0x20000000, 0x00004010,
0x20000010, 0x20404010, 0x00404000, 0x20400000,
0x00404010, 0x20404000, 0x00000000, 0x20400010,
0x00000010, 0x00004000, 0x20400000, 0x00404010,
0x00004000, 0x00400010, 0x20004010, 0x00000000,
0x20404000, 0x20000000, 0x00400010, 0x20004010
};
static const uint32_t sb7[64] = {
0x00200000, 0x04200002, 0x04000802, 0x00000000,
0x00000800, 0x04000802, 0x00200802, 0x04200800,
0x04200802, 0x00200000, 0x00000000, 0x04000002,
0x00000002, 0x04000000, 0x04200002, 0x00000802,
0x04000800, 0x00200802, 0x00200002, 0x04000800,
0x04000002, 0x04200000, 0x04200800, 0x00200002,
0x04200000, 0x00000800, 0x00000802, 0x04200802,
0x00200800, 0x00000002, 0x04000000, 0x00200800,
0x04000000, 0x00200800, 0x00200000, 0x04000802,
0x04000802, 0x04200002, 0x04200002, 0x00000002,
0x00200002, 0x04000000, 0x04000800, 0x00200000,
0x04200800, 0x00000802, 0x00200802, 0x04200800,
0x00000802, 0x04000002, 0x04200802, 0x04200000,
0x00200800, 0x00000000, 0x00000002, 0x04200802,
0x00000000, 0x00200802, 0x04200000, 0x00000800,
0x04000002, 0x04000800, 0x00000800, 0x00200002
};
static const uint32_t sb8[64] = {
0x10001040, 0x00001000, 0x00040000, 0x10041040,
0x10000000, 0x10001040, 0x00000040, 0x10000000,
0x00040040, 0x10040000, 0x10041040, 0x00041000,
0x10041000, 0x00041040, 0x00001000, 0x00000040,
0x10040000, 0x10000040, 0x10001000, 0x00001040,
0x00041000, 0x00040040, 0x10040040, 0x10041000,
0x00001040, 0x00000000, 0x00000000, 0x10040040,
0x10000040, 0x10001000, 0x00041040, 0x00040000,
0x00041040, 0x00040000, 0x10041000, 0x00001000,
0x00000040, 0x10040040, 0x00001000, 0x00041040,
0x10001000, 0x00000040, 0x10000040, 0x10040000,
0x10040040, 0x10000000, 0x00040000, 0x10001040,
0x00000000, 0x10041040, 0x00040040, 0x10000040,
0x10040000, 0x10001000, 0x10001040, 0x00000000,
0x10041040, 0x00041000, 0x00041000, 0x00001040,
0x00001040, 0x00040040, 0x10000000, 0x10041000
};
/*
* PC1: left and right halves bit-swap
*/
static const uint32_t lhs[16] = {
0x00000000, 0x00000001, 0x00000100, 0x00000101,
0x00010000, 0x00010001, 0x00010100, 0x00010101,
0x01000000, 0x01000001, 0x01000100, 0x01000101,
0x01010000, 0x01010001, 0x01010100, 0x01010101
};
static const uint32_t rhs[16] = {
0x00000000, 0x01000000, 0x00010000, 0x01010000,
0x00000100, 0x01000100, 0x00010100, 0x01010100,
0x00000001, 0x01000001, 0x00010001, 0x01010001,
0x00000101, 0x01000101, 0x00010101, 0x01010101,
};
/*
* Initial Permutation macro
*/
#define DES_IP(x,y) \
do { \
t = (x >> 4 ^ y) & 0x0f0f0f0f; y ^= t; x ^= t << 4; \
t = (x >> 16 ^ y) & 0x0000ffff; y ^= t; x ^= t << 16; \
t = (y >> 2 ^ x) & 0x33333333; x ^= t; y ^= t << 2; \
t = (y >> 8 ^ x) & 0x00ff00ff; x ^= t; y ^= t << 8; \
y = rol32(y, 1) & 0xffffffff; \
t = (x ^ y) & 0xaaaaaaaa; y ^= t; x ^= t; \
x = rol32(x, 1) & 0xffffffff; \
} while (0)
/*
* Final Permutation macro
*/
#define DES_FP(x,y) \
do { \
x = ror32(x, 1) & 0xffffffff; \
t = (x ^ y) & 0xaaaaaaaa; x ^= t; y ^= t; \
y = ror32(y, 1) & 0xffffffff; \
t = (y >> 8 ^ x) & 0x00ff00ff; x ^= t; y ^= t << 8; \
t = (y >> 2 ^ x) & 0x33333333; x ^= t; y ^= t << 2; \
t = (x >> 16 ^ y) & 0x0000ffff; y ^= t; x ^= t << 16; \
t = (x >> 4 ^ y) & 0x0f0f0f0f; y ^= t; x ^= t << 4; \
} while (0)
/*
* DES round macro
*/
#define DES_ROUND(x,y) \
do { \
t = *sk++ ^ x; \
y ^= \
sb8[t & 0x3f] ^ \
sb6[t >> 8 & 0x3f] ^ \
sb4[t >> 16 & 0x3f] ^ \
sb2[t >> 24 & 0x3f]; \
t = *sk++ ^ ror32(x, 4); \
y ^= \
sb7[t & 0x3f] ^ \
sb5[t >> 8 & 0x3f] ^ \
sb3[t >> 16 & 0x3f] ^ \
sb1[t >> 24 & 0x3f]; \
} while (0)
#define SWAP(a, b) \
do { \
(a) ^= (b); (b) ^= (a); (a) ^= (b); \
} while (0)
static void
des_setkey(uint32_t sk[32], const uint8_t key[8])
{
uint32_t x, y, t;
unsigned int i;
x = be32dec(key + 0);
y = be32dec(key + 4);
/* permuted choice 1 */
t = (y >> 4 ^ x) & 0x0f0f0f0f; x ^= t; y ^= t << 4;
t = (y ^ x) & 0x10101010; x ^= t; y ^= t ;
x = lhs[x & 0xf] << 3 | lhs[x >> 8 & 0xf] << 2 |
lhs[x >> 16 & 0xf] << 1 | lhs[x >> 24 & 0xf] |
lhs[x >> 5 & 0xf] << 7 | lhs[x >> 13 & 0xf] << 6 |
lhs[x >> 21 & 0xf] << 5 | lhs[x >> 29 & 0xf] << 4;
y = rhs[y >> 1 & 0xf] << 3 | rhs[y >> 9 & 0xf] << 2 |
rhs[y >> 17 & 0xf] << 1 | rhs[y >> 25 & 0xf] |
rhs[y >> 4 & 0xf] << 7 | rhs[y >> 12 & 0xf] << 6 |
rhs[y >> 20 & 0xf] << 5 | rhs[y >> 28 & 0xf] << 4;
x &= 0x0FFFFFFF;
y &= 0x0FFFFFFF;
/* calculate subkeys */
for (i = 0; i < 16; i++) {
if (i < 2 || i == 8 || i == 15) {
x = (x << 1 | x >> 27) & 0x0FFFFFFF;
y = (y << 1 | y >> 27) & 0x0FFFFFFF;
} else {
x = (x << 2 | x >> 26) & 0x0FFFFFFF;
y = (y << 2 | y >> 26) & 0x0FFFFFFF;
}
*sk++ =
(x << 4 & 0x24000000) | (x << 28 & 0x10000000) |
(x << 14 & 0x08000000) | (x << 18 & 0x02080000) |
(x << 6 & 0x01000000) | (x << 9 & 0x00200000) |
(x >> 1 & 0x00100000) | (x << 10 & 0x00040000) |
(x << 2 & 0x00020000) | (x >> 10 & 0x00010000) |
(y >> 13 & 0x00002000) | (y >> 4 & 0x00001000) |
(y << 6 & 0x00000800) | (y >> 1 & 0x00000400) |
(y >> 14 & 0x00000200) | (y & 0x00000100) |
(y >> 5 & 0x00000020) | (y >> 10 & 0x00000010) |
(y >> 3 & 0x00000008) | (y >> 18 & 0x00000004) |
(y >> 26 & 0x00000002) | (y >> 24 & 0x00000001);
*sk++ =
(x << 15 & 0x20000000) | (x << 17 & 0x10000000) |
(x << 10 & 0x08000000) | (x << 22 & 0x04000000) |
(x >> 2 & 0x02000000) | (x << 1 & 0x01000000) |
(x << 16 & 0x00200000) | (x << 11 & 0x00100000) |
(x << 3 & 0x00080000) | (x >> 6 & 0x00040000) |
(x << 15 & 0x00020000) | (x >> 4 & 0x00010000) |
(y >> 2 & 0x00002000) | (y << 8 & 0x00001000) |
(y >> 14 & 0x00000808) | (y >> 9 & 0x00000400) |
(y & 0x00000200) | (y << 7 & 0x00000100) |
(y >> 7 & 0x00000020) | (y >> 3 & 0x00000011) |
(y << 2 & 0x00000004) | (y >> 21 & 0x00000002);
}
}
/*
* DES-ECB block encryption / decryption
*/
static void
des_crypt_ecb(des_ctx *ctx, const uint8_t input[8], uint8_t output[8])
{
uint32_t x, y, t, *sk;
unsigned int i;
sk = ctx->sk;
x = be32dec(input + 0);
y = be32dec(input + 4);
DES_IP(x, y);
for (i = 0; i < 8; ++i) {
DES_ROUND(y, x);
DES_ROUND(x, y);
}
DES_FP(y, x);
be32enc(output + 0, y);
be32enc(output + 4, x);
}
void
des_init(des_ctx *ctx, cipher_mode mode, const uint8_t *key, size_t keylen)
{
unsigned int i;
(void)keylen;
des_setkey(ctx->sk, key);
if (mode == CIPHER_MODE_DECRYPT) {
for (i = 0; i < 16; i += 2) {
SWAP(ctx->sk[i ], ctx->sk[30 - i]);
SWAP(ctx->sk[i + 1], ctx->sk[31 - i]);
}
}
}
size_t
des_encrypt(des_ctx *ctx, const void *vpt, uint8_t *ct, size_t len)
{
const uint8_t *pt = vpt;
unsigned int i;
len -= len % DES_BLOCK_LEN;
for (i = 0; i < len; i += DES_BLOCK_LEN) {
des_crypt_ecb(ctx, pt, ct);
pt += DES_BLOCK_LEN;
ct += DES_BLOCK_LEN;
}
return (len);
}
size_t
des_decrypt(des_ctx *ctx, const uint8_t *ct, void *vpt, size_t len)
{
uint8_t *pt = vpt;
unsigned int i;
len -= len % DES_BLOCK_LEN;
for (i = 0; i < len; i += DES_BLOCK_LEN) {
des_crypt_ecb(ctx, ct, pt);
ct += DES_BLOCK_LEN;
pt += DES_BLOCK_LEN;
}
return (len);
}
void
des_finish(des_ctx *ctx)
{
memset_s(ctx, 0, sizeof *ctx, sizeof *ctx);
}
cipher_algorithm des_cipher = {
.name = "des",
.contextlen = sizeof(des_ctx),
.blocklen = DES_BLOCK_LEN,
.keylen = DES_BLOCK_LEN,
.init = (cipher_init_func)des_init,
.encrypt = (cipher_encrypt_func)des_encrypt,
.decrypt = (cipher_decrypt_func)des_decrypt,
.finish = (cipher_finish_func)des_finish,
};

1
t/.gitignore vendored
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@ -6,6 +6,7 @@
/t_core
/t_ctype
/t_cxx
/t_des
/t_digest
/t_enc
/t_endian

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@ -79,9 +79,10 @@ endif CRYB_RAND
if CRYB_CIPHER
TESTS += t_cipher
t_cipher_LDADD = $(libt) $(libcipher)
TESTS += t_aes t_chacha t_rc4 t_salsa
TESTS += t_aes t_chacha t_des t_rc4 t_salsa
t_aes_LDADD = $(libt) $(libcipher)
t_chacha_LDADD = $(libt) $(libcipher)
t_des_LDADD = $(libt) $(libcipher)
t_rc4_LDADD = $(libt) $(libcipher)
t_salsa_LDADD = $(libt) $(libcipher)
endif CRYB_CIPHER

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t/t_des.c Normal file

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