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gbe_fork/mbedtls/des.c

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added a new cryptography library Mbed TLS
2023-12-23 16:05:24 +02:00
/*
* FIPS-46-3 compliant Triple-DES implementation
*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
/*
* DES, on which TDES is based, was originally designed by Horst Feistel
* at IBM in 1974, and was adopted as a standard by NIST (formerly NBS).
*
* http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf
*/
#include "common.h"
#if defined(MBEDTLS_DES_C)
#include "mbedtls/des.h"
#include "mbedtls/error.h"
#include "mbedtls/platform_util.h"
#include <string.h>
#include "mbedtls/platform.h"
#if !defined(MBEDTLS_DES_ALT)
/*
* 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) = (((Y) << 1) | ((Y) >> 31)) & 0xFFFFFFFF; \
T = ((X) ^ (Y)) & 0xAAAAAAAA; (Y) ^= T; (X) ^= T; \
(X) = (((X) << 1) | ((X) >> 31)) & 0xFFFFFFFF; \
} while (0)
/*
* Final Permutation macro
*/
#define DES_FP(X, Y) \
do \
{ \
(X) = (((X) << 31) | ((X) >> 1)) & 0xFFFFFFFF; \
T = ((X) ^ (Y)) & 0xAAAAAAAA; (X) ^= T; (Y) ^= T; \
(Y) = (((Y) << 31) | ((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++ ^ (((X) << 28) | ((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 \
{ \
uint32_t t = (a); (a) = (b); (b) = t; t = 0; \
} while (0)
void mbedtls_des_init(mbedtls_des_context *ctx)
{
memset(ctx, 0, sizeof(mbedtls_des_context));
}
void mbedtls_des_free(mbedtls_des_context *ctx)
{
if (ctx == NULL) {
return;
}
mbedtls_platform_zeroize(ctx, sizeof(mbedtls_des_context));
}
void mbedtls_des3_init(mbedtls_des3_context *ctx)
{
memset(ctx, 0, sizeof(mbedtls_des3_context));
}
void mbedtls_des3_free(mbedtls_des3_context *ctx)
{
if (ctx == NULL) {
return;
}
mbedtls_platform_zeroize(ctx, sizeof(mbedtls_des3_context));
}
static const unsigned char odd_parity_table[128] = { 1, 2, 4, 7, 8,
11, 13, 14, 16, 19, 21, 22, 25, 26, 28, 31, 32,
35, 37, 38, 41, 42, 44,
47, 49, 50, 52, 55, 56, 59, 61, 62, 64, 67, 69,
70, 73, 74, 76, 79, 81,
82, 84, 87, 88, 91, 93, 94, 97, 98, 100, 103,
104, 107, 109, 110, 112,
115, 117, 118, 121, 122, 124, 127, 128, 131,
133, 134, 137, 138, 140,
143, 145, 146, 148, 151, 152, 155, 157, 158,
161, 162, 164, 167, 168,
171, 173, 174, 176, 179, 181, 182, 185, 186,
188, 191, 193, 194, 196,
199, 200, 203, 205, 206, 208, 211, 213, 214,
217, 218, 220, 223, 224,
227, 229, 230, 233, 234, 236, 239, 241, 242,
244, 247, 248, 251, 253,
254 };
void mbedtls_des_key_set_parity(unsigned char key[MBEDTLS_DES_KEY_SIZE])
{
int i;
for (i = 0; i < MBEDTLS_DES_KEY_SIZE; i++) {
key[i] = odd_parity_table[key[i] / 2];
}
}
/*
* Check the given key's parity, returns 1 on failure, 0 on SUCCESS
*/
int mbedtls_des_key_check_key_parity(const unsigned char key[MBEDTLS_DES_KEY_SIZE])
{
int i;
for (i = 0; i < MBEDTLS_DES_KEY_SIZE; i++) {
if (key[i] != odd_parity_table[key[i] / 2]) {
return 1;
}
}
return 0;
}
/*
* Table of weak and semi-weak keys
*
* Source: http://en.wikipedia.org/wiki/Weak_key
*
* Weak:
* Alternating ones + zeros (0x0101010101010101)
* Alternating 'F' + 'E' (0xFEFEFEFEFEFEFEFE)
* '0xE0E0E0E0F1F1F1F1'
* '0x1F1F1F1F0E0E0E0E'
*
* Semi-weak:
* 0x011F011F010E010E and 0x1F011F010E010E01
* 0x01E001E001F101F1 and 0xE001E001F101F101
* 0x01FE01FE01FE01FE and 0xFE01FE01FE01FE01
* 0x1FE01FE00EF10EF1 and 0xE01FE01FF10EF10E
* 0x1FFE1FFE0EFE0EFE and 0xFE1FFE1FFE0EFE0E
* 0xE0FEE0FEF1FEF1FE and 0xFEE0FEE0FEF1FEF1
*
*/
#define WEAK_KEY_COUNT 16
static const unsigned char weak_key_table[WEAK_KEY_COUNT][MBEDTLS_DES_KEY_SIZE] =
{
{ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 },
{ 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE },
{ 0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E },
{ 0xE0, 0xE0, 0xE0, 0xE0, 0xF1, 0xF1, 0xF1, 0xF1 },
{ 0x01, 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E },
{ 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E, 0x01 },
{ 0x01, 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1 },
{ 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1, 0x01 },
{ 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE },
{ 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01 },
{ 0x1F, 0xE0, 0x1F, 0xE0, 0x0E, 0xF1, 0x0E, 0xF1 },
{ 0xE0, 0x1F, 0xE0, 0x1F, 0xF1, 0x0E, 0xF1, 0x0E },
{ 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E, 0xFE },
{ 0xFE, 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E },
{ 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE },
{ 0xFE, 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1 }
};
int mbedtls_des_key_check_weak(const unsigned char key[MBEDTLS_DES_KEY_SIZE])
{
int i;
for (i = 0; i < WEAK_KEY_COUNT; i++) {
if (memcmp(weak_key_table[i], key, MBEDTLS_DES_KEY_SIZE) == 0) {
return 1;
}
}
return 0;
}
#if !defined(MBEDTLS_DES_SETKEY_ALT)
void mbedtls_des_setkey(uint32_t SK[32], const unsigned char key[MBEDTLS_DES_KEY_SIZE])
{
int i;
uint32_t X, Y, T;
X = MBEDTLS_GET_UINT32_BE(key, 0);
Y = MBEDTLS_GET_UINT32_BE(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);
}
}
#endif /* !MBEDTLS_DES_SETKEY_ALT */
/*
* DES key schedule (56-bit, encryption)
*/
int mbedtls_des_setkey_enc(mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE])
{
mbedtls_des_setkey(ctx->sk, key);
return 0;
}
/*
* DES key schedule (56-bit, decryption)
*/
int mbedtls_des_setkey_dec(mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE])
{
int i;
mbedtls_des_setkey(ctx->sk, key);
for (i = 0; i < 16; i += 2) {
SWAP(ctx->sk[i], ctx->sk[30 - i]);
SWAP(ctx->sk[i + 1], ctx->sk[31 - i]);
}
return 0;
}
static void des3_set2key(uint32_t esk[96],
uint32_t dsk[96],
const unsigned char key[MBEDTLS_DES_KEY_SIZE*2])
{
int i;
mbedtls_des_setkey(esk, key);
mbedtls_des_setkey(dsk + 32, key + 8);
for (i = 0; i < 32; i += 2) {
dsk[i] = esk[30 - i];
dsk[i + 1] = esk[31 - i];
esk[i + 32] = dsk[62 - i];
esk[i + 33] = dsk[63 - i];
esk[i + 64] = esk[i];
esk[i + 65] = esk[i + 1];
dsk[i + 64] = dsk[i];
dsk[i + 65] = dsk[i + 1];
}
}
/*
* Triple-DES key schedule (112-bit, encryption)
*/
int mbedtls_des3_set2key_enc(mbedtls_des3_context *ctx,
const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2])
{
uint32_t sk[96];
des3_set2key(ctx->sk, sk, key);
mbedtls_platform_zeroize(sk, sizeof(sk));
return 0;
}
/*
* Triple-DES key schedule (112-bit, decryption)
*/
int mbedtls_des3_set2key_dec(mbedtls_des3_context *ctx,
const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2])
{
uint32_t sk[96];
des3_set2key(sk, ctx->sk, key);
mbedtls_platform_zeroize(sk, sizeof(sk));
return 0;
}
static void des3_set3key(uint32_t esk[96],
uint32_t dsk[96],
const unsigned char key[24])
{
int i;
mbedtls_des_setkey(esk, key);
mbedtls_des_setkey(dsk + 32, key + 8);
mbedtls_des_setkey(esk + 64, key + 16);
for (i = 0; i < 32; i += 2) {
dsk[i] = esk[94 - i];
dsk[i + 1] = esk[95 - i];
esk[i + 32] = dsk[62 - i];
esk[i + 33] = dsk[63 - i];
dsk[i + 64] = esk[30 - i];
dsk[i + 65] = esk[31 - i];
}
}
/*
* Triple-DES key schedule (168-bit, encryption)
*/
int mbedtls_des3_set3key_enc(mbedtls_des3_context *ctx,
const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3])
{
uint32_t sk[96];
des3_set3key(ctx->sk, sk, key);
mbedtls_platform_zeroize(sk, sizeof(sk));
return 0;
}
/*
* Triple-DES key schedule (168-bit, decryption)
*/
int mbedtls_des3_set3key_dec(mbedtls_des3_context *ctx,
const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3])
{
uint32_t sk[96];
des3_set3key(sk, ctx->sk, key);
mbedtls_platform_zeroize(sk, sizeof(sk));
return 0;
}
/*
* DES-ECB block encryption/decryption
*/
#if !defined(MBEDTLS_DES_CRYPT_ECB_ALT)
int mbedtls_des_crypt_ecb(mbedtls_des_context *ctx,
const unsigned char input[8],
unsigned char output[8])
{
int i;
uint32_t X, Y, T, *SK;
SK = ctx->sk;
X = MBEDTLS_GET_UINT32_BE(input, 0);
Y = MBEDTLS_GET_UINT32_BE(input, 4);
DES_IP(X, Y);
for (i = 0; i < 8; i++) {
DES_ROUND(Y, X);
DES_ROUND(X, Y);
}
DES_FP(Y, X);
MBEDTLS_PUT_UINT32_BE(Y, output, 0);
MBEDTLS_PUT_UINT32_BE(X, output, 4);
return 0;
}
#endif /* !MBEDTLS_DES_CRYPT_ECB_ALT */
#if defined(MBEDTLS_CIPHER_MODE_CBC)
/*
* DES-CBC buffer encryption/decryption
*/
int mbedtls_des_crypt_cbc(mbedtls_des_context *ctx,
int mode,
size_t length,
unsigned char iv[8],
const unsigned char *input,
unsigned char *output)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char temp[8];
if (length % 8) {
return MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH;
}
if (mode == MBEDTLS_DES_ENCRYPT) {
while (length > 0) {
mbedtls_xor(output, input, iv, 8);
ret = mbedtls_des_crypt_ecb(ctx, output, output);
if (ret != 0) {
goto exit;
}
memcpy(iv, output, 8);
input += 8;
output += 8;
length -= 8;
}
} else { /* MBEDTLS_DES_DECRYPT */
while (length > 0) {
memcpy(temp, input, 8);
ret = mbedtls_des_crypt_ecb(ctx, input, output);
if (ret != 0) {
goto exit;
}
mbedtls_xor(output, output, iv, 8);
memcpy(iv, temp, 8);
input += 8;
output += 8;
length -= 8;
}
}
ret = 0;
exit:
return ret;
}
#endif /* MBEDTLS_CIPHER_MODE_CBC */
/*
* 3DES-ECB block encryption/decryption
*/
#if !defined(MBEDTLS_DES3_CRYPT_ECB_ALT)
int mbedtls_des3_crypt_ecb(mbedtls_des3_context *ctx,
const unsigned char input[8],
unsigned char output[8])
{
int i;
uint32_t X, Y, T, *SK;
SK = ctx->sk;
X = MBEDTLS_GET_UINT32_BE(input, 0);
Y = MBEDTLS_GET_UINT32_BE(input, 4);
DES_IP(X, Y);
for (i = 0; i < 8; i++) {
DES_ROUND(Y, X);
DES_ROUND(X, Y);
}
for (i = 0; i < 8; i++) {
DES_ROUND(X, Y);
DES_ROUND(Y, X);
}
for (i = 0; i < 8; i++) {
DES_ROUND(Y, X);
DES_ROUND(X, Y);
}
DES_FP(Y, X);
MBEDTLS_PUT_UINT32_BE(Y, output, 0);
MBEDTLS_PUT_UINT32_BE(X, output, 4);
return 0;
}
#endif /* !MBEDTLS_DES3_CRYPT_ECB_ALT */
#if defined(MBEDTLS_CIPHER_MODE_CBC)
/*
* 3DES-CBC buffer encryption/decryption
*/
int mbedtls_des3_crypt_cbc(mbedtls_des3_context *ctx,
int mode,
size_t length,
unsigned char iv[8],
const unsigned char *input,
unsigned char *output)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char temp[8];
if (length % 8) {
return MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH;
}
if (mode == MBEDTLS_DES_ENCRYPT) {
while (length > 0) {
mbedtls_xor(output, input, iv, 8);
ret = mbedtls_des3_crypt_ecb(ctx, output, output);
if (ret != 0) {
goto exit;
}
memcpy(iv, output, 8);
input += 8;
output += 8;
length -= 8;
}
} else { /* MBEDTLS_DES_DECRYPT */
while (length > 0) {
memcpy(temp, input, 8);
ret = mbedtls_des3_crypt_ecb(ctx, input, output);
if (ret != 0) {
goto exit;
}
mbedtls_xor(output, output, iv, 8);
memcpy(iv, temp, 8);
input += 8;
output += 8;
length -= 8;
}
}
ret = 0;
exit:
return ret;
}
#endif /* MBEDTLS_CIPHER_MODE_CBC */
#endif /* !MBEDTLS_DES_ALT */
#if defined(MBEDTLS_SELF_TEST)
/*
* DES and 3DES test vectors from:
*
* http://csrc.nist.gov/groups/STM/cavp/documents/des/tripledes-vectors.zip
*/
static const unsigned char des3_test_keys[24] =
{
0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01,
0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23
};
static const unsigned char des3_test_buf[8] =
{
0x4E, 0x6F, 0x77, 0x20, 0x69, 0x73, 0x20, 0x74
};
static const unsigned char des3_test_ecb_dec[3][8] =
{
{ 0x37, 0x2B, 0x98, 0xBF, 0x52, 0x65, 0xB0, 0x59 },
{ 0xC2, 0x10, 0x19, 0x9C, 0x38, 0x5A, 0x65, 0xA1 },
{ 0xA2, 0x70, 0x56, 0x68, 0x69, 0xE5, 0x15, 0x1D }
};
static const unsigned char des3_test_ecb_enc[3][8] =
{
{ 0x1C, 0xD5, 0x97, 0xEA, 0x84, 0x26, 0x73, 0xFB },
{ 0xB3, 0x92, 0x4D, 0xF3, 0xC5, 0xB5, 0x42, 0x93 },
{ 0xDA, 0x37, 0x64, 0x41, 0xBA, 0x6F, 0x62, 0x6F }
};
#if defined(MBEDTLS_CIPHER_MODE_CBC)
static const unsigned char des3_test_iv[8] =
{
0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF,
};
static const unsigned char des3_test_cbc_dec[3][8] =
{
{ 0x58, 0xD9, 0x48, 0xEF, 0x85, 0x14, 0x65, 0x9A },
{ 0x5F, 0xC8, 0x78, 0xD4, 0xD7, 0x92, 0xD9, 0x54 },
{ 0x25, 0xF9, 0x75, 0x85, 0xA8, 0x1E, 0x48, 0xBF }
};
static const unsigned char des3_test_cbc_enc[3][8] =
{
{ 0x91, 0x1C, 0x6D, 0xCF, 0x48, 0xA7, 0xC3, 0x4D },
{ 0x60, 0x1A, 0x76, 0x8F, 0xA1, 0xF9, 0x66, 0xF1 },
{ 0xA1, 0x50, 0x0F, 0x99, 0xB2, 0xCD, 0x64, 0x76 }
};
#endif /* MBEDTLS_CIPHER_MODE_CBC */
/*
* Checkup routine
*/
int mbedtls_des_self_test(int verbose)
{
int i, j, u, v, ret = 0;
mbedtls_des_context ctx;
mbedtls_des3_context ctx3;
unsigned char buf[8];
#if defined(MBEDTLS_CIPHER_MODE_CBC)
unsigned char prv[8];
unsigned char iv[8];
#endif
mbedtls_des_init(&ctx);
mbedtls_des3_init(&ctx3);
/*
* ECB mode
*/
for (i = 0; i < 6; i++) {
u = i >> 1;
v = i & 1;
if (verbose != 0) {
mbedtls_printf(" DES%c-ECB-%3d (%s): ",
(u == 0) ? ' ' : '3', 56 + u * 56,
(v == MBEDTLS_DES_DECRYPT) ? "dec" : "enc");
}
memcpy(buf, des3_test_buf, 8);
switch (i) {
case 0:
ret = mbedtls_des_setkey_dec(&ctx, des3_test_keys);
break;
case 1:
ret = mbedtls_des_setkey_enc(&ctx, des3_test_keys);
break;
case 2:
ret = mbedtls_des3_set2key_dec(&ctx3, des3_test_keys);
break;
case 3:
ret = mbedtls_des3_set2key_enc(&ctx3, des3_test_keys);
break;
case 4:
ret = mbedtls_des3_set3key_dec(&ctx3, des3_test_keys);
break;
case 5:
ret = mbedtls_des3_set3key_enc(&ctx3, des3_test_keys);
break;
default:
return 1;
}
if (ret != 0) {
goto exit;
}
for (j = 0; j < 100; j++) {
if (u == 0) {
ret = mbedtls_des_crypt_ecb(&ctx, buf, buf);
} else {
ret = mbedtls_des3_crypt_ecb(&ctx3, buf, buf);
}
if (ret != 0) {
goto exit;
}
}
if ((v == MBEDTLS_DES_DECRYPT &&
memcmp(buf, des3_test_ecb_dec[u], 8) != 0) ||
(v != MBEDTLS_DES_DECRYPT &&
memcmp(buf, des3_test_ecb_enc[u], 8) != 0)) {
if (verbose != 0) {
mbedtls_printf("failed\n");
}
ret = 1;
goto exit;
}
if (verbose != 0) {
mbedtls_printf("passed\n");
}
}
if (verbose != 0) {
mbedtls_printf("\n");
}
#if defined(MBEDTLS_CIPHER_MODE_CBC)
/*
* CBC mode
*/
for (i = 0; i < 6; i++) {
u = i >> 1;
v = i & 1;
if (verbose != 0) {
mbedtls_printf(" DES%c-CBC-%3d (%s): ",
(u == 0) ? ' ' : '3', 56 + u * 56,
(v == MBEDTLS_DES_DECRYPT) ? "dec" : "enc");
}
memcpy(iv, des3_test_iv, 8);
memcpy(prv, des3_test_iv, 8);
memcpy(buf, des3_test_buf, 8);
switch (i) {
case 0:
ret = mbedtls_des_setkey_dec(&ctx, des3_test_keys);
break;
case 1:
ret = mbedtls_des_setkey_enc(&ctx, des3_test_keys);
break;
case 2:
ret = mbedtls_des3_set2key_dec(&ctx3, des3_test_keys);
break;
case 3:
ret = mbedtls_des3_set2key_enc(&ctx3, des3_test_keys);
break;
case 4:
ret = mbedtls_des3_set3key_dec(&ctx3, des3_test_keys);
break;
case 5:
ret = mbedtls_des3_set3key_enc(&ctx3, des3_test_keys);
break;
default:
return 1;
}
if (ret != 0) {
goto exit;
}
if (v == MBEDTLS_DES_DECRYPT) {
for (j = 0; j < 100; j++) {
if (u == 0) {
ret = mbedtls_des_crypt_cbc(&ctx, v, 8, iv, buf, buf);
} else {
ret = mbedtls_des3_crypt_cbc(&ctx3, v, 8, iv, buf, buf);
}
if (ret != 0) {
goto exit;
}
}
} else {
for (j = 0; j < 100; j++) {
unsigned char tmp[8];
if (u == 0) {
ret = mbedtls_des_crypt_cbc(&ctx, v, 8, iv, buf, buf);
} else {
ret = mbedtls_des3_crypt_cbc(&ctx3, v, 8, iv, buf, buf);
}
if (ret != 0) {
goto exit;
}
memcpy(tmp, prv, 8);
memcpy(prv, buf, 8);
memcpy(buf, tmp, 8);
}
memcpy(buf, prv, 8);
}
if ((v == MBEDTLS_DES_DECRYPT &&
memcmp(buf, des3_test_cbc_dec[u], 8) != 0) ||
(v != MBEDTLS_DES_DECRYPT &&
memcmp(buf, des3_test_cbc_enc[u], 8) != 0)) {
if (verbose != 0) {
mbedtls_printf("failed\n");
}
ret = 1;
goto exit;
}
if (verbose != 0) {
mbedtls_printf("passed\n");
}
}
#endif /* MBEDTLS_CIPHER_MODE_CBC */
if (verbose != 0) {
mbedtls_printf("\n");
}
exit:
mbedtls_des_free(&ctx);
mbedtls_des3_free(&ctx3);
if (ret != 0) {
ret = 1;
}
return ret;
}
#endif /* MBEDTLS_SELF_TEST */
#endif /* MBEDTLS_DES_C */
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