Initial revision

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diff --git a/pwmanager/libcrypt/cipher/des.c b/pwmanager/libcrypt/cipher/des.c
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+++ b/pwmanager/libcrypt/cipher/des.c
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+/* des.c - DES and Triple-DES encryption/decryption Algorithm
+ * Copyright (C) 1998, 1999, 2001, 2002, 2003 Free Software Foundation, Inc.
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * 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 their 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__)
+#define working_memcmp memcmp
+#else
+/*
+ * According to the SunOS man page, memcmp returns indeterminate sign
+ * depending on whether characters are signed or not.
+ */
+static int
+working_memcmp( const char *a, const char *b, size_t n )
+{
+    for( ; n; n--, a++, b++ )
+	if( *a != *b )
+	    return (int)(*(byte*)a) - (int)(*(byte*)b);
+    return 0;
+}
+#endif
+
+/*
+ * Encryption/Decryption context of DES
+ */
+typedef struct _des_ctx
+  {
+    u32 encrypt_subkeys[32];
+    u32 decrypt_subkeys[32];
+  }
+des_ctx[1];
+
+/*
+ * Encryption/Decryption context of Triple-DES
+ */
+typedef struct _tripledes_ctx
+  {
+    u32 encrypt_subkeys[96];
+    u32 decrypt_subkeys[96];
+  }
+tripledes_ctx[1];
+
+static void des_key_schedule (const byte *, u32 *);
+static int des_setkey (struct _des_ctx *, const byte *);
+static int des_ecb_crypt (struct _des_ctx *, const byte *, byte *, int);
+static int tripledes_set2keys (struct _tripledes_ctx *,
+                               const byte *, const byte *);
+static int tripledes_set3keys (struct _tripledes_ctx *,
+                               const byte *, const byte *, const byte *);
+static int tripledes_ecb_crypt (struct _tripledes_ctx *,
+                                const byte *, byte *, int);
+static int is_weak_key ( const byte *key );
+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.
+ */
+static u32 sbox1[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 u32 sbox2[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 u32 sbox3[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 u32 sbox4[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 u32 sbox5[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 u32 sbox6[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 u32 sbox7[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 u32 sbox8[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
+};
+
+
+/*
+ * These two tables are part of the 'permuted choice 1' function.
+ * In this implementation several speed improvements are done.
+ */
+static u32 leftkey_swap[16] =
+{
+  0x00000000, 0x00000001, 0x00000100, 0x00000101,
+  0x00010000, 0x00010001, 0x00010100, 0x00010101,
+  0x01000000, 0x01000001, 0x01000100, 0x01000101,
+  0x01010000, 0x01010001, 0x01010100, 0x01010101
+};
+
+static u32 rightkey_swap[16] =
+{
+  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.
+ */
+static byte encrypt_rotate_tab[16] =
+{
+  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 wich 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.
+ */
+static byte weak_keys[64][8] =
+{
+  { 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*/
+};
+static unsigned char weak_keys_chksum[20] = {
+  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.
+ */
+#define DO_PERMUTATION(a, temp, b, offset, mask)	\
+    temp = ((a>>offset) ^ b) & mask;			\
+    b ^= temp;						\
+    a ^= temp<<offset;
+
+
+/*
+ * 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.
+ */
+#define INITIAL_PERMUTATION(left, temp, right)		\
+    DO_PERMUTATION(left, temp, right, 4, 0x0f0f0f0f)	\
+    DO_PERMUTATION(left, temp, right, 16, 0x0000ffff)	\
+    DO_PERMUTATION(right, temp, left, 2, 0x33333333)	\
+    DO_PERMUTATION(right, temp, left, 8, 0x00ff00ff)	\
+    right =  (right << 1) | (right >> 31);		\
+    temp  =  (left ^ right) & 0xaaaaaaaa;		\
+    right ^= temp;					\
+    left  ^= temp;					\
+    left  =  (left << 1) | (left >> 31);
+
+/*
+ * The 'inverse initial permutation'.
+ */
+#define FINAL_PERMUTATION(left, temp, right)		\
+    left  =  (left << 31) | (left >> 1);		\
+    temp  =  (left ^ right) & 0xaaaaaaaa;		\
+    left  ^= temp;					\
+    right ^= temp;					\
+    right  =  (right << 31) | (right >> 1);		\
+    DO_PERMUTATION(right, temp, left, 8, 0x00ff00ff)	\
+    DO_PERMUTATION(right, temp, left, 2, 0x33333333)	\
+    DO_PERMUTATION(left, temp, right, 16, 0x0000ffff)	\
+    DO_PERMUTATION(left, temp, right, 4, 0x0f0f0f0f)
+
+
+/*
+ * 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.
+ */
+#define DES_ROUND(from, to, work, subkey)		\
+    work = from ^ *subkey++;				\
+    to ^= sbox8[  work	    & 0x3f ];			\
+    to ^= sbox6[ (work>>8)  & 0x3f ];			\
+    to ^= sbox4[ (work>>16) & 0x3f ];			\
+    to ^= sbox2[ (work>>24) & 0x3f ];			\
+    work = ((from << 28) | (from >> 4)) ^ *subkey++;	\
+    to ^= sbox7[  work	    & 0x3f ];			\
+    to ^= sbox5[ (work>>8)  & 0x3f ];			\
+    to ^= sbox3[ (work>>16) & 0x3f ];			\
+    to ^= sbox1[ (work>>24) & 0x3f ];
+
+/*
+ * Macros to convert 8 bytes from/to 32bit words.
+ */
+#define READ_64BIT_DATA(data, left, right)				   \
+    left  = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];  \
+    right = (data[4] << 24) | (data[5] << 16) | (data[6] << 8) | data[7];
+
+#define WRITE_64BIT_DATA(data, left, right)				   \
+    data[0] = (left >> 24) &0xff; data[1] = (left >> 16) &0xff; 	   \
+    data[2] = (left >> 8) &0xff; data[3] = left &0xff;			   \
+    data[4] = (right >> 24) &0xff; data[5] = (right >> 16) &0xff;	   \
+    data[6] = (right >> 8) &0xff; data[7] = right &0xff;
+
+/*
+ * Handy macros for encryption and decryption of data
+ */
+#define des_ecb_encrypt(ctx, from, to)	      des_ecb_crypt(ctx, from, to, 0)
+#define des_ecb_decrypt(ctx, from, to)	      des_ecb_crypt(ctx, from, to, 1)
+#define tripledes_ecb_encrypt(ctx, from, to) tripledes_ecb_crypt(ctx,from,to,0)
+#define tripledes_ecb_decrypt(ctx, from, to) tripledes_ecb_crypt(ctx,from,to,1)
+
+
+
+
+
+
+/*
+ * des_key_schedule():	  Calculate 16 subkeys pairs (even/odd) for
+ *			  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
+des_key_schedule (const byte * rawkey, u32 * subkey)
+{
+  u32 left, right, work;
+  int round;
+
+  READ_64BIT_DATA (rawkey, left, right)
+
+  DO_PERMUTATION (right, work, left, 4, 0x0f0f0f0f)
+  DO_PERMUTATION (right, work, left, 0, 0x10101010)
+
+  left = ((leftkey_swap[(left >> 0) & 0xf] << 3)
+          | (leftkey_swap[(left >> 8) & 0xf] << 2)
+          | (leftkey_swap[(left >> 16) & 0xf] << 1)
+          | (leftkey_swap[(left >> 24) & 0xf])
+          | (leftkey_swap[(left >> 5) & 0xf] << 7)
+          | (leftkey_swap[(left >> 13) & 0xf] << 6)
+          | (leftkey_swap[(left >> 21) & 0xf] << 5)
+          | (leftkey_swap[(left >> 29) & 0xf] << 4));
+
+  left &= 0x0fffffff;
+
+  right = ((rightkey_swap[(right >> 1) & 0xf] << 3)
+           | (rightkey_swap[(right >> 9) & 0xf] << 2)
+           | (rightkey_swap[(right >> 17) & 0xf] << 1)
+           | (rightkey_swap[(right >> 25) & 0xf])
+           | (rightkey_swap[(right >> 4) & 0xf] << 7)
+           | (rightkey_swap[(right >> 12) & 0xf] << 6)
+           | (rightkey_swap[(right >> 20) & 0xf] << 5)
+           | (rightkey_swap[(right >> 28) & 0xf] << 4));
+
+  right &= 0x0fffffff;
+
+  for (round = 0; round < 16; ++round)
+    {
+      left = ((left << encrypt_rotate_tab[round])
+              | (left >> (28 - encrypt_rotate_tab[round]))) & 0x0fffffff;
+      right = ((right << encrypt_rotate_tab[round])
+               | (right >> (28 - encrypt_rotate_tab[round]))) & 0x0fffffff;
+
+      *subkey++ = (((left << 4) & 0x24000000)
+                   | ((left << 28) & 0x10000000)
+                   | ((left << 14) & 0x08000000)
+                   | ((left << 18) & 0x02080000)
+                   | ((left << 6) & 0x01000000)
+                   | ((left << 9) & 0x00200000)
+                   | ((left >> 1) & 0x00100000)
+                   | ((left << 10) & 0x00040000)
+                   | ((left << 2) & 0x00020000)
+                   | ((left >> 10) & 0x00010000)
+                   | ((right >> 13) & 0x00002000)
+                   | ((right >> 4) & 0x00001000)
+                   | ((right << 6) & 0x00000800)
+                   | ((right >> 1) & 0x00000400)
+                   | ((right >> 14) & 0x00000200)
+                   | (right & 0x00000100)
+                   | ((right >> 5) & 0x00000020)
+                   | ((right >> 10) & 0x00000010)
+                   | ((right >> 3) & 0x00000008)
+                   | ((right >> 18) & 0x00000004)
+                   | ((right >> 26) & 0x00000002)
+                   | ((right >> 24) & 0x00000001));
+
+      *subkey++ = (((left << 15) & 0x20000000)
+                   | ((left << 17) & 0x10000000)
+                   | ((left << 10) & 0x08000000)
+                   | ((left << 22) & 0x04000000)
+                   | ((left >> 2) & 0x02000000)
+                   | ((left << 1) & 0x01000000)
+                   | ((left << 16) & 0x00200000)
+                   | ((left << 11) & 0x00100000)
+                   | ((left << 3) & 0x00080000)
+                   | ((left >> 6) & 0x00040000)
+                   | ((left << 15) & 0x00020000)
+                   | ((left >> 4) & 0x00010000)
+                   | ((right >> 2) & 0x00002000)
+                   | ((right << 8) & 0x00001000)
+                   | ((right >> 14) & 0x00000808)
+                   | ((right >> 9) & 0x00000400)
+                   | ((right) & 0x00000200)
+                   | ((right << 7) & 0x00000100)
+                   | ((right >> 7) & 0x00000020)
+                   | ((right >> 3) & 0x00000011)
+                   | ((right << 2) & 0x00000004)
+                   | ((right >> 21) & 0x00000002));
+    }
+}
+
+
+/*
+ * 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
+des_setkey (struct _des_ctx *ctx, const byte * key)
+{
+  static const char *selftest_failed;
+  int i;
+
+  if (! initialized)
+    {
+      initialized = 1;
+      selftest_failed = selftest ();
+
+      if (selftest_failed)
+	log_error ("%s\n", selftest_failed);
+    }
+  if (selftest_failed)
+    return GPG_ERR_SELFTEST_FAILED;
+
+  des_key_schedule (key, ctx->encrypt_subkeys);
+  _gcry_burn_stack (32);
+
+  for(i=0; i<32; i+=2)
+    {
+      ctx->decrypt_subkeys[i]	= ctx->encrypt_subkeys[30-i];
+      ctx->decrypt_subkeys[i+1] = ctx->encrypt_subkeys[31-i];
+    }
+
+  return 0;
+}
+
+
+
+/*
+ * Electronic Codebook Mode DES encryption/decryption of data according
+ * to 'mode'.
+ */
+static int
+des_ecb_crypt (struct _des_ctx *ctx, const byte * from, byte * to, int mode)
+{
+  u32 left, right, work;
+  u32 *keys;
+
+  keys = mode ? ctx->decrypt_subkeys : ctx->encrypt_subkeys;
+
+  READ_64BIT_DATA (from, left, right)
+  INITIAL_PERMUTATION (left, work, right)
+
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+
+  FINAL_PERMUTATION (right, work, left)
+  WRITE_64BIT_DATA (to, right, left)
+
+  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
+tripledes_set2keys (struct _tripledes_ctx *ctx,
+		    const byte * key1,
+		    const byte * key2)
+{
+  int i;
+
+  des_key_schedule (key1, ctx->encrypt_subkeys);
+  des_key_schedule (key2, &(ctx->decrypt_subkeys[32]));
+  _gcry_burn_stack (32);
+
+  for(i=0; i<32; i+=2)
+    {
+      ctx->decrypt_subkeys[i]	 = ctx->encrypt_subkeys[30-i];
+      ctx->decrypt_subkeys[i+1]  = ctx->encrypt_subkeys[31-i];
+
+      ctx->encrypt_subkeys[i+32] = ctx->decrypt_subkeys[62-i];
+      ctx->encrypt_subkeys[i+33] = ctx->decrypt_subkeys[63-i];
+
+      ctx->encrypt_subkeys[i+64] = ctx->encrypt_subkeys[i];
+      ctx->encrypt_subkeys[i+65] = ctx->encrypt_subkeys[i+1];
+
+      ctx->decrypt_subkeys[i+64] = ctx->decrypt_subkeys[i];
+      ctx->decrypt_subkeys[i+65] = ctx->decrypt_subkeys[i+1];
+    }
+
+  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
+tripledes_set3keys (struct _tripledes_ctx *ctx,
+		    const byte * key1,
+		    const byte * key2,
+		    const byte * key3)
+{
+  static const char *selftest_failed;
+  int i;
+
+  if (! initialized)
+    {
+      initialized = 1;
+      selftest_failed = selftest ();
+
+      if (selftest_failed)
+	log_error ("%s\n", selftest_failed);
+    }
+  if (selftest_failed)
+    return GPG_ERR_SELFTEST_FAILED;
+
+  des_key_schedule (key1, ctx->encrypt_subkeys);
+  des_key_schedule (key2, &(ctx->decrypt_subkeys[32]));
+  des_key_schedule (key3, &(ctx->encrypt_subkeys[64]));
+  _gcry_burn_stack (32);
+
+  for(i=0; i<32; i+=2)
+    {
+      ctx->decrypt_subkeys[i]	 = ctx->encrypt_subkeys[94-i];
+      ctx->decrypt_subkeys[i+1]  = ctx->encrypt_subkeys[95-i];
+
+      ctx->encrypt_subkeys[i+32] = ctx->decrypt_subkeys[62-i];
+      ctx->encrypt_subkeys[i+33] = ctx->decrypt_subkeys[63-i];
+
+      ctx->decrypt_subkeys[i+64] = ctx->encrypt_subkeys[30-i];
+      ctx->decrypt_subkeys[i+65] = ctx->encrypt_subkeys[31-i];
+     }
+
+  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
+tripledes_ecb_crypt (struct _tripledes_ctx *ctx, const byte * from,
+                     byte * to, int mode)
+{
+  u32 left, right, work;
+  u32 *keys;
+
+  keys = mode ? ctx->decrypt_subkeys : ctx->encrypt_subkeys;
+
+  READ_64BIT_DATA (from, left, right)
+  INITIAL_PERMUTATION (left, work, right)
+
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+
+  DES_ROUND (left, right, work, keys) DES_ROUND (right, left, work, keys)
+  DES_ROUND (left, right, work, keys) DES_ROUND (right, left, work, keys)
+  DES_ROUND (left, right, work, keys) DES_ROUND (right, left, work, keys)
+  DES_ROUND (left, right, work, keys) DES_ROUND (right, left, work, keys)
+  DES_ROUND (left, right, work, keys) DES_ROUND (right, left, work, keys)
+  DES_ROUND (left, right, work, keys) DES_ROUND (right, left, work, keys)
+  DES_ROUND (left, right, work, keys) DES_ROUND (right, left, work, keys)
+  DES_ROUND (left, right, work, keys) DES_ROUND (right, left, work, keys)
+
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+  DES_ROUND (right, left, work, keys) DES_ROUND (left, right, work, keys)
+
+  FINAL_PERMUTATION (right, work, left)
+  WRITE_64BIT_DATA (to, right, left)
+
+  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
+is_weak_key ( const byte *key )
+{
+  byte work[8];
+  int i, left, right, middle, cmp_result;
+
+  /* clear parity bits */
+  for(i=0; i<8; ++i)
+     work[i] = key[i] & 0xfe;
+
+  /* binary search in the weak key table */
+  left = 0;
+  right = 63;
+  while(left <= right)
+    {
+      middle = (left + right) / 2;
+
+      if ( !(cmp_result=working_memcmp(work, weak_keys[middle], 8)) )
+	  return -1;
+
+      if ( cmp_result > 0 )
+	  left = middle + 1;
+      else
+	  right = middle - 1;
+    }
+
+  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;
+    byte key[8] =
+      {0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55};
+    byte input[8] =
+      {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+    byte result[8] =
+      {0x24, 0x6e, 0x9d, 0xb9, 0xc5, 0x50, 0x38, 0x1a};
+    byte temp1[8], temp2[8], temp3[8];
+    des_ctx des;
+
+    for (i = 0; i < 64; ++i)
+      {
+	des_setkey (des, key);
+	des_ecb_encrypt (des, input, temp1);
+	des_ecb_encrypt (des, temp1, temp2);
+	des_setkey (des, temp2);
+	des_ecb_decrypt (des, temp1, temp3);
+	memcpy (key, temp3, 8);
+	memcpy (input, temp1, 8);
+      }
+    if (memcmp (temp3, result, 8))
+      return "DES maintenance test failed.";
+  }
+
+
+  /*
+   * Self made Triple-DES test	(Does somebody know an official test?)
+   */
+  {
+    int i;
+    byte input[8] =
+      {0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10};
+    byte key1[8] =
+      {0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0};
+    byte key2[8] =
+      {0x11, 0x22, 0x33, 0x44, 0xff, 0xaa, 0xcc, 0xdd};
+    byte result[8] =
+      {0x7b, 0x38, 0x3b, 0x23, 0xa2, 0x7d, 0x26, 0xd3};
+
+    tripledes_ctx des3;
+
+    for (i = 0; i < 16; ++i)
+      {
+	tripledes_set2keys (des3, key1, key2);
+	tripledes_ecb_encrypt (des3, input, key1);
+	tripledes_ecb_decrypt (des3, input, key2);
+	tripledes_set3keys (des3, key1, input, key2);
+	tripledes_ecb_encrypt (des3, input, input);
+      }
+    if (memcmp (input, result, 8))
+      return "Triple-DES test failed.";
+  }
+  
+  /*
+   * More Triple-DES test.  These are testvectors as used by SSLeay,
+   * thanks to Jeroen C. van Gelderen.
+   */
+  { 
+    struct { byte key[24]; byte plain[8]; byte cipher[8]; } testdata[] = {
+      { { 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  }
+      }
+    };
+
+    byte		result[8];
+    int		i;
+    static char	error[80];
+    tripledes_ctx	des3;
+
+    for (i=0; i<sizeof(testdata)/sizeof(*testdata); ++i)
+      {
+        tripledes_set3keys (des3, testdata[i].key,
+                            testdata[i].key + 8, testdata[i].key + 16);
+        
+        tripledes_ecb_encrypt (des3, testdata[i].plain, result);
+        if (memcmp (testdata[i].cipher, result, 8))
+          {
+            sprintf (error, "Triple-DES SSLeay test pattern no. %d "
+                     "failed on encryption.", i+1);
+            return error;
+          }
+
+        tripledes_ecb_decrypt (des3, testdata[i].cipher, result);
+        if (memcmp (testdata[i].plain, result, 8))
+          {
+            sprintf (error, "Triple-DES SSLeay test pattern no. %d "
+                     "failed on decryption.", i+1);
+            return error;
+          }
+      }
+  }
+
+  /*
+   * 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)
+      gcry_md_write (h, weak_keys[i], 8);
+    p = gcry_md_read (h, GCRY_MD_SHA1);
+    i = memcmp (p, weak_keys_chksum, 20);
+    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
+do_tripledes_setkey ( void *context, const byte *key, unsigned keylen )
+{
+  struct _tripledes_ctx *ctx = (struct _tripledes_ctx *) context;
+
+  if( keylen != 24 )
+    return GPG_ERR_INV_KEYLEN;
+
+  tripledes_set3keys ( ctx, key, key+8, key+16);
+
+  if( is_weak_key( key ) || is_weak_key( key+8 ) || is_weak_key( key+16 ) )
+    {
+      _gcry_burn_stack (64);
+      return GPG_ERR_WEAK_KEY;
+    }
+  _gcry_burn_stack (64);
+
+  return GPG_ERR_NO_ERROR;
+}
+
+
+static void
+do_tripledes_encrypt( void *context, byte *outbuf, const byte *inbuf )
+{
+  struct _tripledes_ctx *ctx = (struct _tripledes_ctx *) context;
+
+  tripledes_ecb_encrypt ( ctx, inbuf, outbuf );
+  _gcry_burn_stack (32);
+}
+
+static void
+do_tripledes_decrypt( void *context, byte *outbuf, const byte *inbuf )
+{
+  struct _tripledes_ctx *ctx = (struct _tripledes_ctx *) context;
+  tripledes_ecb_decrypt ( ctx, inbuf, outbuf );
+  _gcry_burn_stack (32);
+}
+
+static gcry_err_code_t
+do_des_setkey (void *context, const byte *key, unsigned keylen)
+{
+  struct _des_ctx *ctx = (struct _des_ctx *) context;
+
+  if (keylen != 8)
+    return GPG_ERR_INV_KEYLEN;
+
+  des_setkey (ctx, key);
+
+  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
+do_des_encrypt( void *context, byte *outbuf, const byte *inbuf )
+{
+  struct _des_ctx *ctx = (struct _des_ctx *) context;
+
+  des_ecb_encrypt ( ctx, inbuf, outbuf );
+  _gcry_burn_stack (32);
+}
+
+static void
+do_des_decrypt( void *context, byte *outbuf, const byte *inbuf )
+{
+  struct _des_ctx *ctx = (struct _des_ctx *) context;
+
+  des_ecb_decrypt ( ctx, inbuf, outbuf );
+  _gcry_burn_stack (32);
+}
+
+gcry_cipher_spec_t _gcry_cipher_spec_des =
+  {
+    "DES", NULL, NULL, 8, 64, sizeof (struct _des_ctx),
+    do_des_setkey, do_des_encrypt, do_des_decrypt
+  };
+
+static gcry_cipher_oid_spec_t oids_tripledes[] =
+  {
+    { "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 }
+  };
+
+gcry_cipher_spec_t _gcry_cipher_spec_tripledes =
+  {
+    "3DES", NULL, oids_tripledes, 8, 192, sizeof (struct _tripledes_ctx),
+    do_tripledes_setkey, do_tripledes_encrypt, do_tripledes_decrypt
+  };