/* des.c - DES and Triple-DES encryption/decryption Algorithm
* Copyright (C) 1998, 1999, 2001, 2002, 2003,
* 2008 Free Software Foundation, Inc.
*
* This file is part of Libgcrypt.
*
* it under the terms of the GNU Lesser general Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* For a description of triple encryption, see:
* Bruce Schneier: Applied Cryptography. Second Edition.
* John Wiley & Sons, 1996. ISBN 0-471-12845-7. Pages 358 ff.
* This implementation is according to the definition of DES in FIPS
* PUB 46-2 from December 1993.
*/
/*
* Written by Michael Roth <mroth@nessie.de>, September 1998
*/
/*
* U S A G E
* ===========
*
* For DES or Triple-DES encryption/decryption you must initialize a proper
* encryption context with a key.
*
* A DES key is 64bit wide but only 56bits of the key are used. The remaining
* bits are parity bits and they will _not_ checked in this implementation, but
* simply ignored.
*
* For Triple-DES you could use either two 64bit keys or three 64bit keys.
* The parity bits will _not_ checked, too.
*
* After initializing a context with a key you could use this context to
* encrypt or decrypt data in 64bit blocks in Electronic Codebook Mode.
*
* (In the examples below the slashes at the beginning and ending of comments
* are omited.)
*
* DES Example
* -----------
* unsigned char key[8];
* unsigned char plaintext[8];
* unsigned char ciphertext[8];
* unsigned char recoverd[8];
* des_ctx context;
*
* * Fill 'key' and 'plaintext' with some data *
* ....
*
* * Set up the DES encryption context *
* des_setkey(context, key);
*
* * Encrypt the plaintext *
* des_ecb_encrypt(context, plaintext, ciphertext);
*
* * To recover the orginal plaintext from ciphertext use: *
* des_ecb_decrypt(context, ciphertext, recoverd);
*
*
* Triple-DES Example
* ------------------
* unsigned char key1[8];
* unsigned char key2[8];
* unsigned char key3[8];
* unsigned char plaintext[8];
* unsigned char ciphertext[8];
* unsigned char recoverd[8];
* tripledes_ctx context;
*
* * If you would like to use two 64bit keys, fill 'key1' and'key2'
* then setup the encryption context: *
* tripledes_set2keys(context, key1, key2);
*
* * To use three 64bit keys with Triple-DES use: *
* tripledes_set3keys(context, key1, key2, key3);
*
* * Encrypting plaintext with Triple-DES *
* tripledes_ecb_encrypt(context, plaintext, ciphertext);
*
* * Decrypting ciphertext to recover the plaintext with Triple-DES *
* tripledes_ecb_decrypt(context, ciphertext, recoverd);
*
*
* Selftest
* --------
* char *error_msg;
*
* * To perform a selftest of this DES/Triple-DES implementation use the
* function selftest(). It will return an error string if there are
* some problems with this library. *
*
* if ( (error_msg = selftest()) )
* {
* fprintf(stderr, "An error in the DES/Tripple-DES implementation occured: %s\n", error_msg);
* abort();
* }
*/
#include <config.h>
#include <stdio.h>
#include <string.h> /* memcpy, memcmp */
#include "types.h" /* for byte and u32 typedefs */
#include "g10lib.h"
#include "cipher.h"
#if defined(__GNUC__) && defined(__GNU_LIBRARY__)
#else
/*
* According to the SunOS man page, memcmp returns indeterminate sign
* depending on whether characters are signed or not.
*/
static int
{
for( ; n; n--, a++, b++ )
if( *a != *b )
return 0;
}
#endif
/*
* Encryption/Decryption context of DES
*/
typedef struct _des_ctx
{
}
/*
* Encryption/Decryption context of Triple-DES
*/
typedef struct _tripledes_ctx
{
struct {
int no_weak_key;
} flags;
}
static int tripledes_set2keys (struct _tripledes_ctx *,
static int tripledes_set3keys (struct _tripledes_ctx *,
static int tripledes_ecb_crypt (struct _tripledes_ctx *,
static const char *selftest (void);
static int initialized;
/*
* The s-box values are permuted according to the 'primitive function P'
* and are rotated one bit to the left.
*/
{
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
};
{
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
};
{
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
};
{
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
};
{
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
};
{
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
};
{
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
};
{
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
};
/*
* These two tables are part of the 'permuted choice 1' function.
* In this implementation several speed improvements are done.
*/
{
0x00000000, 0x00000001, 0x00000100, 0x00000101,
0x00010000, 0x00010001, 0x00010100, 0x00010101,
0x01000000, 0x01000001, 0x01000100, 0x01000101,
0x01010000, 0x01010001, 0x01010100, 0x01010101
};
{
0x00000000, 0x01000000, 0x00010000, 0x01010000,
0x00000100, 0x01000100, 0x00010100, 0x01010100,
0x00000001, 0x01000001, 0x00010001, 0x01010001,
0x00000101, 0x01000101, 0x00010101, 0x01010101,
};
/*
* Numbers of left shifts per round for encryption subkeys.
* To calculate the decryption subkeys we just reverse the
* ordering of the calculated encryption subkeys. So their
* is no need for a decryption rotate tab.
*/
{
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
};
/*
* Table with weak DES keys sorted in ascending order.
* In DES their are 64 known keys which are weak. They are weak
* because they produce only one, two or four different
* subkeys in the subkey scheduling process.
* The keys in this table have all their parity bits cleared.
*/
{
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, /*w*/
{ 0x00, 0x00, 0x1e, 0x1e, 0x00, 0x00, 0x0e, 0x0e },
{ 0x00, 0x00, 0xe0, 0xe0, 0x00, 0x00, 0xf0, 0xf0 },
{ 0x00, 0x00, 0xfe, 0xfe, 0x00, 0x00, 0xfe, 0xfe },
{ 0x00, 0x1e, 0x00, 0x1e, 0x00, 0x0e, 0x00, 0x0e }, /*sw*/
{ 0x00, 0x1e, 0x1e, 0x00, 0x00, 0x0e, 0x0e, 0x00 },
{ 0x00, 0x1e, 0xe0, 0xfe, 0x00, 0x0e, 0xf0, 0xfe },
{ 0x00, 0x1e, 0xfe, 0xe0, 0x00, 0x0e, 0xfe, 0xf0 },
{ 0x00, 0xe0, 0x00, 0xe0, 0x00, 0xf0, 0x00, 0xf0 }, /*sw*/
{ 0x00, 0xe0, 0x1e, 0xfe, 0x00, 0xf0, 0x0e, 0xfe },
{ 0x00, 0xe0, 0xe0, 0x00, 0x00, 0xf0, 0xf0, 0x00 },
{ 0x00, 0xe0, 0xfe, 0x1e, 0x00, 0xf0, 0xfe, 0x0e },
{ 0x00, 0xfe, 0x00, 0xfe, 0x00, 0xfe, 0x00, 0xfe }, /*sw*/
{ 0x00, 0xfe, 0x1e, 0xe0, 0x00, 0xfe, 0x0e, 0xf0 },
{ 0x00, 0xfe, 0xe0, 0x1e, 0x00, 0xfe, 0xf0, 0x0e },
{ 0x00, 0xfe, 0xfe, 0x00, 0x00, 0xfe, 0xfe, 0x00 },
{ 0x1e, 0x00, 0x00, 0x1e, 0x0e, 0x00, 0x00, 0x0e },
{ 0x1e, 0x00, 0x1e, 0x00, 0x0e, 0x00, 0x0e, 0x00 }, /*sw*/
{ 0x1e, 0x00, 0xe0, 0xfe, 0x0e, 0x00, 0xf0, 0xfe },
{ 0x1e, 0x00, 0xfe, 0xe0, 0x0e, 0x00, 0xfe, 0xf0 },
{ 0x1e, 0x1e, 0x00, 0x00, 0x0e, 0x0e, 0x00, 0x00 },
{ 0x1e, 0x1e, 0x1e, 0x1e, 0x0e, 0x0e, 0x0e, 0x0e }, /*w*/
{ 0x1e, 0x1e, 0xe0, 0xe0, 0x0e, 0x0e, 0xf0, 0xf0 },
{ 0x1e, 0x1e, 0xfe, 0xfe, 0x0e, 0x0e, 0xfe, 0xfe },
{ 0x1e, 0xe0, 0x00, 0xfe, 0x0e, 0xf0, 0x00, 0xfe },
{ 0x1e, 0xe0, 0x1e, 0xe0, 0x0e, 0xf0, 0x0e, 0xf0 }, /*sw*/
{ 0x1e, 0xe0, 0xe0, 0x1e, 0x0e, 0xf0, 0xf0, 0x0e },
{ 0x1e, 0xe0, 0xfe, 0x00, 0x0e, 0xf0, 0xfe, 0x00 },
{ 0x1e, 0xfe, 0x00, 0xe0, 0x0e, 0xfe, 0x00, 0xf0 },
{ 0x1e, 0xfe, 0x1e, 0xfe, 0x0e, 0xfe, 0x0e, 0xfe }, /*sw*/
{ 0x1e, 0xfe, 0xe0, 0x00, 0x0e, 0xfe, 0xf0, 0x00 },
{ 0x1e, 0xfe, 0xfe, 0x1e, 0x0e, 0xfe, 0xfe, 0x0e },
{ 0xe0, 0x00, 0x00, 0xe0, 0xf0, 0x00, 0x00, 0xf0 },
{ 0xe0, 0x00, 0x1e, 0xfe, 0xf0, 0x00, 0x0e, 0xfe },
{ 0xe0, 0x00, 0xe0, 0x00, 0xf0, 0x00, 0xf0, 0x00 }, /*sw*/
{ 0xe0, 0x00, 0xfe, 0x1e, 0xf0, 0x00, 0xfe, 0x0e },
{ 0xe0, 0x1e, 0x00, 0xfe, 0xf0, 0x0e, 0x00, 0xfe },
{ 0xe0, 0x1e, 0x1e, 0xe0, 0xf0, 0x0e, 0x0e, 0xf0 },
{ 0xe0, 0x1e, 0xe0, 0x1e, 0xf0, 0x0e, 0xf0, 0x0e }, /*sw*/
{ 0xe0, 0x1e, 0xfe, 0x00, 0xf0, 0x0e, 0xfe, 0x00 },
{ 0xe0, 0xe0, 0x00, 0x00, 0xf0, 0xf0, 0x00, 0x00 },
{ 0xe0, 0xe0, 0x1e, 0x1e, 0xf0, 0xf0, 0x0e, 0x0e },
{ 0xe0, 0xe0, 0xe0, 0xe0, 0xf0, 0xf0, 0xf0, 0xf0 }, /*w*/
{ 0xe0, 0xe0, 0xfe, 0xfe, 0xf0, 0xf0, 0xfe, 0xfe },
{ 0xe0, 0xfe, 0x00, 0x1e, 0xf0, 0xfe, 0x00, 0x0e },
{ 0xe0, 0xfe, 0x1e, 0x00, 0xf0, 0xfe, 0x0e, 0x00 },
{ 0xe0, 0xfe, 0xe0, 0xfe, 0xf0, 0xfe, 0xf0, 0xfe }, /*sw*/
{ 0xe0, 0xfe, 0xfe, 0xe0, 0xf0, 0xfe, 0xfe, 0xf0 },
{ 0xfe, 0x00, 0x00, 0xfe, 0xfe, 0x00, 0x00, 0xfe },
{ 0xfe, 0x00, 0x1e, 0xe0, 0xfe, 0x00, 0x0e, 0xf0 },
{ 0xfe, 0x00, 0xe0, 0x1e, 0xfe, 0x00, 0xf0, 0x0e },
{ 0xfe, 0x00, 0xfe, 0x00, 0xfe, 0x00, 0xfe, 0x00 }, /*sw*/
{ 0xfe, 0x1e, 0x00, 0xe0, 0xfe, 0x0e, 0x00, 0xf0 },
{ 0xfe, 0x1e, 0x1e, 0xfe, 0xfe, 0x0e, 0x0e, 0xfe },
{ 0xfe, 0x1e, 0xe0, 0x00, 0xfe, 0x0e, 0xf0, 0x00 },
{ 0xfe, 0x1e, 0xfe, 0x1e, 0xfe, 0x0e, 0xfe, 0x0e }, /*sw*/
{ 0xfe, 0xe0, 0x00, 0x1e, 0xfe, 0xf0, 0x00, 0x0e },
{ 0xfe, 0xe0, 0x1e, 0x00, 0xfe, 0xf0, 0x0e, 0x00 },
{ 0xfe, 0xe0, 0xe0, 0xfe, 0xfe, 0xf0, 0xf0, 0xfe },
{ 0xfe, 0xe0, 0xfe, 0xe0, 0xfe, 0xf0, 0xfe, 0xf0 }, /*sw*/
{ 0xfe, 0xfe, 0x00, 0x00, 0xfe, 0xfe, 0x00, 0x00 },
{ 0xfe, 0xfe, 0x1e, 0x1e, 0xfe, 0xfe, 0x0e, 0x0e },
{ 0xfe, 0xfe, 0xe0, 0xe0, 0xfe, 0xfe, 0xf0, 0xf0 },
{ 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe } /*w*/
};
0xD0, 0xCF, 0x07, 0x38, 0x93, 0x70, 0x8A, 0x83, 0x7D, 0xD7,
0x8A, 0x36, 0x65, 0x29, 0x6C, 0x1F, 0x7C, 0x3F, 0xD3, 0x41
};
/*
* Macro to swap bits across two words.
*/
b ^= temp; \
/*
* This performs the 'initial permutation' of the data to be encrypted
* or decrypted. Additionally the resulting two words are rotated one bit
* to the left.
*/
/*
* The 'inverse initial permutation'.
*/
/*
* A full DES round including 'expansion function', 'sbox substitution'
* and 'primitive function P' but without swapping the left and right word.
* Please note: The data in 'from' and 'to' is already rotated one bit to
* the left, done in the initial permutation.
*/
/*
*/
/*
* Handy macros for encryption and decryption of data
*/
/*
* 16 encryption rounds.
* To calculate subkeys for decryption the caller
* have to reorder the generated subkeys.
*
* rawkey: 8 Bytes of key data
* subkey: Array of at least 32 u32s. Will be filled
* with calculated subkeys.
*
*/
static void
{
int round;
left &= 0x0fffffff;
right &= 0x0fffffff;
{
| (right & 0x00000100)
| ((right) & 0x00000200)
}
}
/*
* Fill a DES context with subkeys calculated from a 64bit key.
* Does not check parity bits, but simply ignore them.
* Does not check for weak keys.
*/
static int
{
static const char *selftest_failed;
int i;
if (!fips_mode () && !initialized)
{
initialized = 1;
selftest_failed = selftest ();
if (selftest_failed)
}
if (selftest_failed)
return GPG_ERR_SELFTEST_FAILED;
_gcry_burn_stack (32);
for(i=0; i<32; i+=2)
{
}
return 0;
}
/*
* Electronic Codebook Mode DES encryption/decryption of data according
* to 'mode'.
*/
static int
{
return 0;
}
/*
* Fill a Triple-DES context with subkeys calculated from two 64bit keys.
* Does not check the parity bits of the keys, but simply ignore them.
* Does not check for weak keys.
*/
static int
{
int i;
_gcry_burn_stack (32);
for(i=0; i<32; i+=2)
{
}
return 0;
}
/*
* Fill a Triple-DES context with subkeys calculated from three 64bit keys.
* Does not check the parity bits of the keys, but simply ignore them.
* Does not check for weak keys.
*/
static int
{
static const char *selftest_failed;
int i;
if (!fips_mode () && !initialized)
{
initialized = 1;
selftest_failed = selftest ();
if (selftest_failed)
}
if (selftest_failed)
return GPG_ERR_SELFTEST_FAILED;
_gcry_burn_stack (32);
for(i=0; i<32; i+=2)
{
}
return 0;
}
/*
* Electronic Codebook Mode Triple-DES encryption/decryption of data
* according to 'mode'. Sometimes this mode is named 'EDE' mode
* (Encryption-Decryption-Encryption).
*/
static int
{
return 0;
}
/*
* Check whether the 8 byte key is weak.
* Does not check the parity bits of the key but simple ignore them.
*/
static int
{
/* clear parity bits */
for(i=0; i<8; ++i)
/* binary search in the weak key table */
left = 0;
right = 63;
{
return -1;
if ( cmp_result > 0 )
else
}
return 0;
}
/*
* Performs a selftest of this DES/Triple-DES implementation.
* Returns an string with the error text on failure.
* Returns NULL if all is ok.
*/
static const char *
selftest (void)
{
/*
* Check if 'u32' is really 32 bits wide. This DES / 3DES implementation
* need this.
*/
if (sizeof (u32) != 4)
return "Wrong word size for DES configured.";
/*
* DES Maintenance Test
*/
{
int i;
{0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55};
{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
{0x24, 0x6e, 0x9d, 0xb9, 0xc5, 0x50, 0x38, 0x1a};
for (i = 0; i < 64; ++i)
{
}
return "DES maintenance test failed.";
}
/*
* Self made Triple-DES test (Does somebody know an official test?)
*/
{
int i;
{0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10};
{0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0};
{0x11, 0x22, 0x33, 0x44, 0xff, 0xaa, 0xcc, 0xdd};
{0x7b, 0x38, 0x3b, 0x23, 0xa2, 0x7d, 0x26, 0xd3};
for (i = 0; i < 16; ++i)
{
}
return "Triple-DES test failed.";
}
/*
* More Triple-DES test. These are testvectors as used by SSLeay,
* thanks to Jeroen C. van Gelderen.
*/
{
{ { 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01 },
{ 0x95,0xF8,0xA5,0xE5,0xDD,0x31,0xD9,0x00 },
{ 0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }
},
{ { 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01 },
{ 0x9D,0x64,0x55,0x5A,0x9A,0x10,0xB8,0x52, },
{ 0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x00 }
},
{ { 0x38,0x49,0x67,0x4C,0x26,0x02,0x31,0x9E,
0x38,0x49,0x67,0x4C,0x26,0x02,0x31,0x9E,
0x38,0x49,0x67,0x4C,0x26,0x02,0x31,0x9E },
{ 0x51,0x45,0x4B,0x58,0x2D,0xDF,0x44,0x0A },
{ 0x71,0x78,0x87,0x6E,0x01,0xF1,0x9B,0x2A }
},
{ { 0x04,0xB9,0x15,0xBA,0x43,0xFE,0xB5,0xB6,
0x04,0xB9,0x15,0xBA,0x43,0xFE,0xB5,0xB6,
0x04,0xB9,0x15,0xBA,0x43,0xFE,0xB5,0xB6 },
{ 0x42,0xFD,0x44,0x30,0x59,0x57,0x7F,0xA2 },
{ 0xAF,0x37,0xFB,0x42,0x1F,0x8C,0x40,0x95 }
},
{ { 0x01,0x23,0x45,0x67,0x89,0xAB,0xCD,0xEF,
0x01,0x23,0x45,0x67,0x89,0xAB,0xCD,0xEF,
0x01,0x23,0x45,0x67,0x89,0xAB,0xCD,0xEF },
{ 0x73,0x6F,0x6D,0x65,0x64,0x61,0x74,0x61 },
{ 0x3D,0x12,0x4F,0xE2,0x19,0x8B,0xA3,0x18 }
},
{ { 0x01,0x23,0x45,0x67,0x89,0xAB,0xCD,0xEF,
0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
0x01,0x23,0x45,0x67,0x89,0xAB,0xCD,0xEF },
{ 0x73,0x6F,0x6D,0x65,0x64,0x61,0x74,0x61 },
{ 0xFB,0xAB,0xA1,0xFF,0x9D,0x05,0xE9,0xB1 }
},
{ { 0x01,0x23,0x45,0x67,0x89,0xAB,0xCD,0xEF,
0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
0xFE,0xDC,0xBA,0x98,0x76,0x54,0x32,0x10 },
{ 0x73,0x6F,0x6D,0x65,0x64,0x61,0x74,0x61 },
{ 0x18,0xd7,0x48,0xe5,0x63,0x62,0x05,0x72 }
},
{ { 0x03,0x52,0x02,0x07,0x67,0x20,0x82,0x17,
0x86,0x02,0x87,0x66,0x59,0x08,0x21,0x98,
0x64,0x05,0x6A,0xBD,0xFE,0xA9,0x34,0x57 },
{ 0x73,0x71,0x75,0x69,0x67,0x67,0x6C,0x65 },
{ 0xc0,0x7d,0x2a,0x0f,0xa5,0x66,0xfa,0x30 }
},
{ { 0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x80,0x01,0x01,0x01,0x01,0x01,0x01,0x01,
0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x02 },
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
{ 0xe6,0xe6,0xdd,0x5b,0x7e,0x72,0x29,0x74 }
},
{ { 0x10,0x46,0x10,0x34,0x89,0x98,0x80,0x20,
0x91,0x07,0xD0,0x15,0x89,0x19,0x01,0x01,
0x19,0x07,0x92,0x10,0x98,0x1A,0x01,0x01 },
{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
{ 0xe1,0xef,0x62,0xc3,0x32,0xfe,0x82,0x5b }
}
};
int i;
{
return "Triple-DES SSLeay test failed on encryption.";
return "Triple-DES SSLeay test failed on decryption.";;
}
}
/*
* Check the weak key detection. We simply assume that the table
* with weak keys is ok and check every key in the table if it is
* detected... (This test is a little bit stupid).
*/
{
int i;
unsigned char *p;
gcry_md_hd_t h;
if (_gcry_md_open (&h, GCRY_MD_SHA1, 0))
return "SHA1 not available";
for (i = 0; i < 64; ++i)
p = _gcry_md_read (h, GCRY_MD_SHA1);
_gcry_md_close (h);
if (i)
return "weak key table defect";
for (i = 0; i < 64; ++i)
if (!is_weak_key(weak_keys[i]))
return "DES weak key detection failed";
}
return 0;
}
static gcry_err_code_t
{
if( keylen != 24 )
return GPG_ERR_INV_KEYLEN;
; /* Detection has been disabled. */
{
_gcry_burn_stack (64);
return GPG_ERR_WEAK_KEY;
}
_gcry_burn_stack (64);
return GPG_ERR_NO_ERROR;
}
static gcry_err_code_t
{
(void)buffer;
(void)buflen;
switch (what)
{
case CIPHER_INFO_NO_WEAK_KEY:
break;
default:
ec = GPG_ERR_INV_OP;
break;
}
return ec;
}
static void
{
_gcry_burn_stack (32);
}
static void
{
_gcry_burn_stack (32);
}
static gcry_err_code_t
{
if (keylen != 8)
return GPG_ERR_INV_KEYLEN;
if (is_weak_key (key)) {
_gcry_burn_stack (64);
return GPG_ERR_WEAK_KEY;
}
_gcry_burn_stack (64);
return GPG_ERR_NO_ERROR;
}
static void
{
_gcry_burn_stack (32);
}
static void
{
_gcry_burn_stack (32);
}
/*
Self-test section.
*/
/* Selftest for TripleDES. */
static gpg_err_code_t
{
const char *what;
const char *errtxt;
(void)extended; /* No extended tests available. */
what = "low-level";
if (errtxt)
goto failed;
/* The low-level self-tests are quite extensive and thus we can do
without high level tests. This is also justified because we have
no custom block code implementation for 3des but always use the
standard high level block code. */
return 0; /* Succeeded. */
if (report)
return GPG_ERR_SELFTEST_FAILED;
}
/* Run a full self-test for ALGO and return 0 on success. */
static gpg_err_code_t
{
switch (algo)
{
case GCRY_CIPHER_3DES:
break;
default:
break;
}
return ec;
}
{
};
{
{ "1.2.840.113549.3.7", GCRY_CIPHER_MODE_CBC },
/* Teletrust specific OID for 3DES. */
{ "1.3.36.3.1.3.2.1", GCRY_CIPHER_MODE_CBC },
/* pbeWithSHAAnd3_KeyTripleDES_CBC */
{ "1.2.840.113549.1.12.1.3", GCRY_CIPHER_MODE_CBC },
{ NULL }
};
{
};
{
};