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diff --git a/gnulib/lib/des.c b/gnulib/lib/des.c
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+/* des.c --- DES and Triple-DES encryption/decryption Algorithm
+ * Copyright (C) 1998-1999, 2001-2007, 2009-2011 Free Software Foundation, Inc.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * This file 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this file; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ */
+
+/* Adapted for gnulib by Simon Josefsson, based on Libgcrypt. */
+
+/*
+ * 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.
+ *
+ * DES Example
+ * -----------
+ * unsigned char key[8];
+ * unsigned char plaintext[8];
+ * unsigned char ciphertext[8];
+ * unsigned char recoverd[8];
+ * gl_des_ctx context;
+ *
+ * // Fill 'key' and 'plaintext' with some data
+ * ....
+ *
+ * // Set up the DES encryption context
+ * gl_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];
+ * gl_3des_ctx context;
+ *
+ * // If you would like to use two 64bit keys, fill 'key1' and'key2'
+ * // then setup the encryption context:
+ * gl_3des_set2keys(&context, key1, key2);
+ *
+ * // To use three 64bit keys with Triple-DES use:
+ * gl_3des_set3keys(&context, key1, key2, key3);
+ *
+ * // Encrypting plaintext with Triple-DES
+ * gl_3des_ecb_encrypt(&context, plaintext, ciphertext);
+ *
+ * // Decrypting ciphertext to recover the plaintext with Triple-DES
+ * gl_3des_ecb_decrypt(&context, ciphertext, recoverd);
+ */
+
+
+#include <config.h>
+
+#include "des.h"
+
+#include <stdio.h>
+#include <string.h> /* memcpy, memcmp */
+
+/*
+ * The s-box values are permuted according to the 'primitive function P'
+ * and are rotated one bit to the left.
+ */
+static const uint32_t 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 const uint32_t 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 const uint32_t 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 const uint32_t 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 const uint32_t 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 const uint32_t 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 const uint32_t 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 const uint32_t 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 const uint32_t leftkey_swap[16] = {
+ 0x00000000, 0x00000001, 0x00000100, 0x00000101,
+ 0x00010000, 0x00010001, 0x00010100, 0x00010101,
+ 0x01000000, 0x01000001, 0x01000100, 0x01000101,
+ 0x01010000, 0x01010001, 0x01010100, 0x01010101
+};
+
+static const uint32_t 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 there is no need for a
+ * decryption rotate tab.
+ */
+static const unsigned char 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 there
+ * 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.
+ */
+static const unsigned char 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 */
+};
+
+bool
+gl_des_is_weak_key (const char * key)
+{
+ char work[8];
+ int i, left, right, middle, cmp_result;
+
+ /* clear parity bits */
+ for (i = 0; i < 8; ++i)
+ work[i] = ((unsigned char)key[i]) & 0xfe;
+
+ /* binary search in the weak key table */
+ left = 0;
+ right = 63;
+ while (left <= right)
+ {
+ middle = (left + right) / 2;
+
+ if (!(cmp_result = memcmp (work, weak_keys[middle], 8)))
+ return -1;
+
+ if (cmp_result > 0)
+ left = middle + 1;
+ else
+ right = middle - 1;
+ }
+
+ return 0;
+}
+
+/*
+ * 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;
+
+/*
+ * 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 uint32_ts. Will be filled
+ * with calculated subkeys.
+ *
+ */
+static void
+des_key_schedule (const char * _rawkey, uint32_t * subkey)
+{
+ const unsigned char *rawkey = (const unsigned char *) _rawkey;
+ uint32_t 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));
+ }
+}
+
+void
+gl_des_setkey (gl_des_ctx *ctx, const char * key)
+{
+ int i;
+
+ des_key_schedule (key, ctx->encrypt_subkeys);
+
+ 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];
+ }
+}
+
+bool
+gl_des_makekey (gl_des_ctx *ctx, const char * key, size_t keylen)
+{
+ if (keylen != 8)
+ return false;
+
+ gl_des_setkey (ctx, key);
+
+ return !gl_des_is_weak_key (key);
+}
+
+void
+gl_des_ecb_crypt (gl_des_ctx *ctx, const char * _from, char * _to, int mode)
+{
+ const unsigned char *from = (const unsigned char *) _from;
+ unsigned char *to = (unsigned char *) _to;
+ uint32_t left, right, work;
+ uint32_t *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)
+}
+
+void
+gl_3des_set2keys (gl_3des_ctx *ctx, const char * key1, const char * key2)
+{
+ int i;
+
+ des_key_schedule (key1, ctx->encrypt_subkeys);
+ des_key_schedule (key2, &(ctx->decrypt_subkeys[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];
+ }
+}
+
+void
+gl_3des_set3keys (gl_3des_ctx *ctx, const char * key1,
+ const char * key2, const char * key3)
+{
+ int i;
+
+ des_key_schedule (key1, ctx->encrypt_subkeys);
+ des_key_schedule (key2, &(ctx->decrypt_subkeys[32]));
+ des_key_schedule (key3, &(ctx->encrypt_subkeys[64]));
+
+ 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];
+ }
+}
+
+void
+gl_3des_ecb_crypt (gl_3des_ctx *ctx,
+ const char * _from,
+ char * _to, int mode)
+{
+ const unsigned char *from = (const unsigned char *) _from;
+ unsigned char *to = (unsigned char *) _to;
+ uint32_t left, right, work;
+ uint32_t *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)
+}
+
+bool
+gl_3des_makekey (gl_3des_ctx *ctx, const char * key, size_t keylen)
+{
+ if (keylen != 24)
+ return false;
+
+ gl_3des_set3keys (ctx, key, key + 8, key + 16);
+
+ return !(gl_des_is_weak_key (key)
+ || gl_des_is_weak_key (key + 8)
+ || gl_des_is_weak_key (key + 16));
+}
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