Adding upstream version 13.4.upstream/13.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 791 insertions, 0 deletions

diff --git a/contrib/pgcrypto/crypt-des.c b/contrib/pgcrypto/crypt-des.c
new file mode 100644
index 0000000..6efaa60
--- /dev/null
+++ b/contrib/pgcrypto/crypt-des.c
@@ -0,0 +1,791 @@
+/*
+ * FreeSec: libcrypt for NetBSD
+ *
+ * contrib/pgcrypto/crypt-des.c
+ *
+ * Copyright (c) 1994 David Burren
+ * All rights reserved.
+ *
+ * Adapted for FreeBSD-2.0 by Geoffrey M. Rehmet
+ *	this file should now *only* export crypt(), in order to make
+ *	binaries of libcrypt exportable from the USA
+ *
+ * Adapted for FreeBSD-4.0 by Mark R V Murray
+ *	this file should now *only* export px_crypt_des(), in order to make
+ *	a module that can be optionally included in libcrypt.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *	  notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *	  notice, this list of conditions and the following disclaimer in the
+ *	  documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of other contributors
+ *	  may be used to endorse or promote products derived from this software
+ *	  without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: src/secure/lib/libcrypt/crypt-des.c,v 1.12 1999/09/20 12:39:20 markm Exp $
+ *
+ * This is an original implementation of the DES and the crypt(3) interfaces
+ * by David Burren <davidb@werj.com.au>.
+ *
+ * An excellent reference on the underlying algorithm (and related
+ * algorithms) is:
+ *
+ *	B. Schneier, Applied Cryptography: protocols, algorithms,
+ *	and source code in C, John Wiley & Sons, 1994.
+ *
+ * Note that in that book's description of DES the lookups for the initial,
+ * pbox, and final permutations are inverted (this has been brought to the
+ * attention of the author).  A list of errata for this book has been
+ * posted to the sci.crypt newsgroup by the author and is available for FTP.
+ *
+ * ARCHITECTURE ASSUMPTIONS:
+ *	It is assumed that the 8-byte arrays passed by reference can be
+ *	addressed as arrays of uint32's (ie. the CPU is not picky about
+ *	alignment).
+ */
+
+#include "postgres.h"
+#include "miscadmin.h"
+#include "port/pg_bswap.h"
+
+#include "px-crypt.h"
+
+#define _PASSWORD_EFMT1 '_'
+
+static const char _crypt_a64[] =
+"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+static uint8 IP[64] = {
+	58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
+	62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
+	57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
+	61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7
+};
+
+static uint8 inv_key_perm[64];
+static uint8 u_key_perm[56];
+static uint8 key_perm[56] = {
+	57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18,
+	10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
+	63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22,
+	14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4
+};
+
+static uint8 key_shifts[16] = {
+	1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
+};
+
+static uint8 inv_comp_perm[56];
+static uint8 comp_perm[48] = {
+	14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10,
+	23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
+	41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
+	44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32
+};
+
+/*
+ *	No E box is used, as it's replaced by some ANDs, shifts, and ORs.
+ */
+
+static uint8 u_sbox[8][64];
+static uint8 sbox[8][64] = {
+	{
+		14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
+		0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
+		4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
+		15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
+	},
+	{
+		15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
+		3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
+		0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
+		13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9
+	},
+	{
+		10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
+		13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
+		13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
+		1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12
+	},
+	{
+		7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
+		13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
+		10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
+		3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14
+	},
+	{
+		2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
+		14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
+		4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
+		11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3
+	},
+	{
+		12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
+		10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
+		9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
+		4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13
+	},
+	{
+		4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
+		13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
+		1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
+		6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12
+	},
+	{
+		13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
+		1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
+		7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
+		2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
+	}
+};
+
+static uint8 un_pbox[32];
+static uint8 pbox[32] = {
+	16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
+	2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25
+};
+
+static uint32 _crypt_bits32[32] =
+{
+	0x80000000, 0x40000000, 0x20000000, 0x10000000,
+	0x08000000, 0x04000000, 0x02000000, 0x01000000,
+	0x00800000, 0x00400000, 0x00200000, 0x00100000,
+	0x00080000, 0x00040000, 0x00020000, 0x00010000,
+	0x00008000, 0x00004000, 0x00002000, 0x00001000,
+	0x00000800, 0x00000400, 0x00000200, 0x00000100,
+	0x00000080, 0x00000040, 0x00000020, 0x00000010,
+	0x00000008, 0x00000004, 0x00000002, 0x00000001
+};
+
+static uint8 _crypt_bits8[8] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
+
+static uint32 saltbits;
+static long old_salt;
+static uint32 *bits28,
+		   *bits24;
+static uint8 init_perm[64],
+			final_perm[64];
+static uint32 en_keysl[16],
+			en_keysr[16];
+static uint32 de_keysl[16],
+			de_keysr[16];
+static int	des_initialised = 0;
+static uint8 m_sbox[4][4096];
+static uint32 psbox[4][256];
+static uint32 ip_maskl[8][256],
+			ip_maskr[8][256];
+static uint32 fp_maskl[8][256],
+			fp_maskr[8][256];
+static uint32 key_perm_maskl[8][128],
+			key_perm_maskr[8][128];
+static uint32 comp_maskl[8][128],
+			comp_maskr[8][128];
+static uint32 old_rawkey0,
+			old_rawkey1;
+
+static inline int
+ascii_to_bin(char ch)
+{
+	if (ch > 'z')
+		return 0;
+	if (ch >= 'a')
+		return (ch - 'a' + 38);
+	if (ch > 'Z')
+		return 0;
+	if (ch >= 'A')
+		return (ch - 'A' + 12);
+	if (ch > '9')
+		return 0;
+	if (ch >= '.')
+		return (ch - '.');
+	return 0;
+}
+
+static void
+des_init(void)
+{
+	int			i,
+				j,
+				b,
+				k,
+				inbit,
+				obit;
+	uint32	   *p,
+			   *il,
+			   *ir,
+			   *fl,
+			   *fr;
+
+	old_rawkey0 = old_rawkey1 = 0L;
+	saltbits = 0L;
+	old_salt = 0L;
+	bits24 = (bits28 = _crypt_bits32 + 4) + 4;
+
+	/*
+	 * Invert the S-boxes, reordering the input bits.
+	 */
+	for (i = 0; i < 8; i++)
+		for (j = 0; j < 64; j++)
+		{
+			b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf);
+			u_sbox[i][j] = sbox[i][b];
+		}
+
+	/*
+	 * Convert the inverted S-boxes into 4 arrays of 8 bits. Each will handle
+	 * 12 bits of the S-box input.
+	 */
+	for (b = 0; b < 4; b++)
+		for (i = 0; i < 64; i++)
+			for (j = 0; j < 64; j++)
+				m_sbox[b][(i << 6) | j] =
+					(u_sbox[(b << 1)][i] << 4) |
+					u_sbox[(b << 1) + 1][j];
+
+	/*
+	 * Set up the initial & final permutations into a useful form, and
+	 * initialise the inverted key permutation.
+	 */
+	for (i = 0; i < 64; i++)
+	{
+		init_perm[final_perm[i] = IP[i] - 1] = i;
+		inv_key_perm[i] = 255;
+	}
+
+	/*
+	 * Invert the key permutation and initialise the inverted key compression
+	 * permutation.
+	 */
+	for (i = 0; i < 56; i++)
+	{
+		u_key_perm[i] = key_perm[i] - 1;
+		inv_key_perm[key_perm[i] - 1] = i;
+		inv_comp_perm[i] = 255;
+	}
+
+	/*
+	 * Invert the key compression permutation.
+	 */
+	for (i = 0; i < 48; i++)
+		inv_comp_perm[comp_perm[i] - 1] = i;
+
+	/*
+	 * Set up the OR-mask arrays for the initial and final permutations, and
+	 * for the key initial and compression permutations.
+	 */
+	for (k = 0; k < 8; k++)
+	{
+		for (i = 0; i < 256; i++)
+		{
+			*(il = &ip_maskl[k][i]) = 0L;
+			*(ir = &ip_maskr[k][i]) = 0L;
+			*(fl = &fp_maskl[k][i]) = 0L;
+			*(fr = &fp_maskr[k][i]) = 0L;
+			for (j = 0; j < 8; j++)
+			{
+				inbit = 8 * k + j;
+				if (i & _crypt_bits8[j])
+				{
+					if ((obit = init_perm[inbit]) < 32)
+						*il |= _crypt_bits32[obit];
+					else
+						*ir |= _crypt_bits32[obit - 32];
+					if ((obit = final_perm[inbit]) < 32)
+						*fl |= _crypt_bits32[obit];
+					else
+						*fr |= _crypt_bits32[obit - 32];
+				}
+			}
+		}
+		for (i = 0; i < 128; i++)
+		{
+			*(il = &key_perm_maskl[k][i]) = 0L;
+			*(ir = &key_perm_maskr[k][i]) = 0L;
+			for (j = 0; j < 7; j++)
+			{
+				inbit = 8 * k + j;
+				if (i & _crypt_bits8[j + 1])
+				{
+					if ((obit = inv_key_perm[inbit]) == 255)
+						continue;
+					if (obit < 28)
+						*il |= bits28[obit];
+					else
+						*ir |= bits28[obit - 28];
+				}
+			}
+			*(il = &comp_maskl[k][i]) = 0L;
+			*(ir = &comp_maskr[k][i]) = 0L;
+			for (j = 0; j < 7; j++)
+			{
+				inbit = 7 * k + j;
+				if (i & _crypt_bits8[j + 1])
+				{
+					if ((obit = inv_comp_perm[inbit]) == 255)
+						continue;
+					if (obit < 24)
+						*il |= bits24[obit];
+					else
+						*ir |= bits24[obit - 24];
+				}
+			}
+		}
+	}
+
+	/*
+	 * Invert the P-box permutation, and convert into OR-masks for handling
+	 * the output of the S-box arrays setup above.
+	 */
+	for (i = 0; i < 32; i++)
+		un_pbox[pbox[i] - 1] = i;
+
+	for (b = 0; b < 4; b++)
+		for (i = 0; i < 256; i++)
+		{
+			*(p = &psbox[b][i]) = 0L;
+			for (j = 0; j < 8; j++)
+			{
+				if (i & _crypt_bits8[j])
+					*p |= _crypt_bits32[un_pbox[8 * b + j]];
+			}
+		}
+
+	des_initialised = 1;
+}
+
+static void
+setup_salt(long salt)
+{
+	uint32		obit,
+				saltbit;
+	int			i;
+
+	if (salt == old_salt)
+		return;
+	old_salt = salt;
+
+	saltbits = 0L;
+	saltbit = 1;
+	obit = 0x800000;
+	for (i = 0; i < 24; i++)
+	{
+		if (salt & saltbit)
+			saltbits |= obit;
+		saltbit <<= 1;
+		obit >>= 1;
+	}
+}
+
+static int
+des_setkey(const char *key)
+{
+	uint32		k0,
+				k1,
+				rawkey0,
+				rawkey1;
+	int			shifts,
+				round;
+
+	if (!des_initialised)
+		des_init();
+
+	rawkey0 = pg_ntoh32(*(const uint32 *) key);
+	rawkey1 = pg_ntoh32(*(const uint32 *) (key + 4));
+
+	if ((rawkey0 | rawkey1)
+		&& rawkey0 == old_rawkey0
+		&& rawkey1 == old_rawkey1)
+	{
+		/*
+		 * Already setup for this key. This optimization fails on a zero key
+		 * (which is weak and has bad parity anyway) in order to simplify the
+		 * starting conditions.
+		 */
+		return 0;
+	}
+	old_rawkey0 = rawkey0;
+	old_rawkey1 = rawkey1;
+
+	/*
+	 * Do key permutation and split into two 28-bit subkeys.
+	 */
+	k0 = key_perm_maskl[0][rawkey0 >> 25]
+		| key_perm_maskl[1][(rawkey0 >> 17) & 0x7f]
+		| key_perm_maskl[2][(rawkey0 >> 9) & 0x7f]
+		| key_perm_maskl[3][(rawkey0 >> 1) & 0x7f]
+		| key_perm_maskl[4][rawkey1 >> 25]
+		| key_perm_maskl[5][(rawkey1 >> 17) & 0x7f]
+		| key_perm_maskl[6][(rawkey1 >> 9) & 0x7f]
+		| key_perm_maskl[7][(rawkey1 >> 1) & 0x7f];
+	k1 = key_perm_maskr[0][rawkey0 >> 25]
+		| key_perm_maskr[1][(rawkey0 >> 17) & 0x7f]
+		| key_perm_maskr[2][(rawkey0 >> 9) & 0x7f]
+		| key_perm_maskr[3][(rawkey0 >> 1) & 0x7f]
+		| key_perm_maskr[4][rawkey1 >> 25]
+		| key_perm_maskr[5][(rawkey1 >> 17) & 0x7f]
+		| key_perm_maskr[6][(rawkey1 >> 9) & 0x7f]
+		| key_perm_maskr[7][(rawkey1 >> 1) & 0x7f];
+
+	/*
+	 * Rotate subkeys and do compression permutation.
+	 */
+	shifts = 0;
+	for (round = 0; round < 16; round++)
+	{
+		uint32		t0,
+					t1;
+
+		shifts += key_shifts[round];
+
+		t0 = (k0 << shifts) | (k0 >> (28 - shifts));
+		t1 = (k1 << shifts) | (k1 >> (28 - shifts));
+
+		de_keysl[15 - round] =
+			en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f]
+			| comp_maskl[1][(t0 >> 14) & 0x7f]
+			| comp_maskl[2][(t0 >> 7) & 0x7f]
+			| comp_maskl[3][t0 & 0x7f]
+			| comp_maskl[4][(t1 >> 21) & 0x7f]
+			| comp_maskl[5][(t1 >> 14) & 0x7f]
+			| comp_maskl[6][(t1 >> 7) & 0x7f]
+			| comp_maskl[7][t1 & 0x7f];
+
+		de_keysr[15 - round] =
+			en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f]
+			| comp_maskr[1][(t0 >> 14) & 0x7f]
+			| comp_maskr[2][(t0 >> 7) & 0x7f]
+			| comp_maskr[3][t0 & 0x7f]
+			| comp_maskr[4][(t1 >> 21) & 0x7f]
+			| comp_maskr[5][(t1 >> 14) & 0x7f]
+			| comp_maskr[6][(t1 >> 7) & 0x7f]
+			| comp_maskr[7][t1 & 0x7f];
+	}
+	return 0;
+}
+
+static int
+do_des(uint32 l_in, uint32 r_in, uint32 *l_out, uint32 *r_out, int count)
+{
+	/*
+	 * l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
+	 */
+	uint32		l,
+				r,
+			   *kl,
+			   *kr,
+			   *kl1,
+			   *kr1;
+	uint32		f,
+				r48l,
+				r48r;
+	int			round;
+
+	if (count == 0)
+		return 1;
+	else if (count > 0)
+	{
+		/*
+		 * Encrypting
+		 */
+		kl1 = en_keysl;
+		kr1 = en_keysr;
+	}
+	else
+	{
+		/*
+		 * Decrypting
+		 */
+		count = -count;
+		kl1 = de_keysl;
+		kr1 = de_keysr;
+	}
+
+	/*
+	 * Do initial permutation (IP).
+	 */
+	l = ip_maskl[0][l_in >> 24]
+		| ip_maskl[1][(l_in >> 16) & 0xff]
+		| ip_maskl[2][(l_in >> 8) & 0xff]
+		| ip_maskl[3][l_in & 0xff]
+		| ip_maskl[4][r_in >> 24]
+		| ip_maskl[5][(r_in >> 16) & 0xff]
+		| ip_maskl[6][(r_in >> 8) & 0xff]
+		| ip_maskl[7][r_in & 0xff];
+	r = ip_maskr[0][l_in >> 24]
+		| ip_maskr[1][(l_in >> 16) & 0xff]
+		| ip_maskr[2][(l_in >> 8) & 0xff]
+		| ip_maskr[3][l_in & 0xff]
+		| ip_maskr[4][r_in >> 24]
+		| ip_maskr[5][(r_in >> 16) & 0xff]
+		| ip_maskr[6][(r_in >> 8) & 0xff]
+		| ip_maskr[7][r_in & 0xff];
+
+	while (count--)
+	{
+		CHECK_FOR_INTERRUPTS();
+
+		/*
+		 * Do each round.
+		 */
+		kl = kl1;
+		kr = kr1;
+		round = 16;
+		while (round--)
+		{
+			/*
+			 * Expand R to 48 bits (simulate the E-box).
+			 */
+			r48l = ((r & 0x00000001) << 23)
+				| ((r & 0xf8000000) >> 9)
+				| ((r & 0x1f800000) >> 11)
+				| ((r & 0x01f80000) >> 13)
+				| ((r & 0x001f8000) >> 15);
+
+			r48r = ((r & 0x0001f800) << 7)
+				| ((r & 0x00001f80) << 5)
+				| ((r & 0x000001f8) << 3)
+				| ((r & 0x0000001f) << 1)
+				| ((r & 0x80000000) >> 31);
+
+			/*
+			 * Do salting for crypt() and friends, and XOR with the permuted
+			 * key.
+			 */
+			f = (r48l ^ r48r) & saltbits;
+			r48l ^= f ^ *kl++;
+			r48r ^= f ^ *kr++;
+
+			/*
+			 * Do sbox lookups (which shrink it back to 32 bits) and do the
+			 * pbox permutation at the same time.
+			 */
+			f = psbox[0][m_sbox[0][r48l >> 12]]
+				| psbox[1][m_sbox[1][r48l & 0xfff]]
+				| psbox[2][m_sbox[2][r48r >> 12]]
+				| psbox[3][m_sbox[3][r48r & 0xfff]];
+
+			/*
+			 * Now that we've permuted things, complete f().
+			 */
+			f ^= l;
+			l = r;
+			r = f;
+		}
+		r = l;
+		l = f;
+	}
+
+	/*
+	 * Do final permutation (inverse of IP).
+	 */
+	*l_out = fp_maskl[0][l >> 24]
+		| fp_maskl[1][(l >> 16) & 0xff]
+		| fp_maskl[2][(l >> 8) & 0xff]
+		| fp_maskl[3][l & 0xff]
+		| fp_maskl[4][r >> 24]
+		| fp_maskl[5][(r >> 16) & 0xff]
+		| fp_maskl[6][(r >> 8) & 0xff]
+		| fp_maskl[7][r & 0xff];
+	*r_out = fp_maskr[0][l >> 24]
+		| fp_maskr[1][(l >> 16) & 0xff]
+		| fp_maskr[2][(l >> 8) & 0xff]
+		| fp_maskr[3][l & 0xff]
+		| fp_maskr[4][r >> 24]
+		| fp_maskr[5][(r >> 16) & 0xff]
+		| fp_maskr[6][(r >> 8) & 0xff]
+		| fp_maskr[7][r & 0xff];
+	return 0;
+}
+
+static int
+des_cipher(const char *in, char *out, long salt, int count)
+{
+	uint32		buffer[2];
+	uint32		l_out,
+				r_out,
+				rawl,
+				rawr;
+	int			retval;
+
+	if (!des_initialised)
+		des_init();
+
+	setup_salt(salt);
+
+	/* copy data to avoid assuming input is word-aligned */
+	memcpy(buffer, in, sizeof(buffer));
+
+	rawl = pg_ntoh32(buffer[0]);
+	rawr = pg_ntoh32(buffer[1]);
+
+	retval = do_des(rawl, rawr, &l_out, &r_out, count);
+	if (retval)
+		return retval;
+
+	buffer[0] = pg_hton32(l_out);
+	buffer[1] = pg_hton32(r_out);
+
+	/* copy data to avoid assuming output is word-aligned */
+	memcpy(out, buffer, sizeof(buffer));
+
+	return retval;
+}
+
+char *
+px_crypt_des(const char *key, const char *setting)
+{
+	int			i;
+	uint32		count,
+				salt,
+				l,
+				r0,
+				r1,
+				keybuf[2];
+	char	   *p;
+	uint8	   *q;
+	static char output[21];
+
+	if (!des_initialised)
+		des_init();
+
+
+	/*
+	 * Copy the key, shifting each character up by one bit and padding with
+	 * zeros.
+	 */
+	q = (uint8 *) keybuf;
+	while (q - (uint8 *) keybuf - 8)
+	{
+		*q++ = *key << 1;
+		if (*key != '\0')
+			key++;
+	}
+	if (des_setkey((char *) keybuf))
+		return NULL;
+
+#ifndef DISABLE_XDES
+	if (*setting == _PASSWORD_EFMT1)
+	{
+		/*
+		 * "new"-style: setting must be a 9-character (underscore, then 4
+		 * bytes of count, then 4 bytes of salt) string. See CRYPT(3) under
+		 * the "Extended crypt" heading for further details.
+		 *
+		 * Unlimited characters of the input key are used. This is known as
+		 * the "Extended crypt" DES method.
+		 *
+		 */
+		if (strlen(setting) < 9)
+			ereport(ERROR,
+					(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+					 errmsg("invalid salt")));
+
+		for (i = 1, count = 0L; i < 5; i++)
+			count |= ascii_to_bin(setting[i]) << (i - 1) * 6;
+
+		for (i = 5, salt = 0L; i < 9; i++)
+			salt |= ascii_to_bin(setting[i]) << (i - 5) * 6;
+
+		while (*key)
+		{
+			/*
+			 * Encrypt the key with itself.
+			 */
+			if (des_cipher((char *) keybuf, (char *) keybuf, 0L, 1))
+				return NULL;
+
+			/*
+			 * And XOR with the next 8 characters of the key.
+			 */
+			q = (uint8 *) keybuf;
+			while (q - (uint8 *) keybuf - 8 && *key)
+				*q++ ^= *key++ << 1;
+
+			if (des_setkey((char *) keybuf))
+				return NULL;
+		}
+		StrNCpy(output, setting, 10);
+
+		/*
+		 * Double check that we weren't given a short setting. If we were, the
+		 * above code will probably have created weird values for count and
+		 * salt, but we don't really care. Just make sure the output string
+		 * doesn't have an extra NUL in it.
+		 */
+		p = output + strlen(output);
+	}
+	else
+#endif							/* !DISABLE_XDES */
+	{
+		/*
+		 * "old"-style: setting - 2 bytes of salt key - only up to the first 8
+		 * characters of the input key are used.
+		 */
+		count = 25;
+
+		if (strlen(setting) < 2)
+			ereport(ERROR,
+					(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+					 errmsg("invalid salt")));
+
+		salt = (ascii_to_bin(setting[1]) << 6)
+			| ascii_to_bin(setting[0]);
+
+		output[0] = setting[0];
+
+		/*
+		 * If the encrypted password that the salt was extracted from is only
+		 * 1 character long, the salt will be corrupted.  We need to ensure
+		 * that the output string doesn't have an extra NUL in it!
+		 */
+		output[1] = setting[1] ? setting[1] : output[0];
+
+		p = output + 2;
+	}
+	setup_salt(salt);
+
+	/*
+	 * Do it.
+	 */
+	if (do_des(0L, 0L, &r0, &r1, count))
+		return NULL;
+
+	/*
+	 * Now encode the result...
+	 */
+	l = (r0 >> 8);
+	*p++ = _crypt_a64[(l >> 18) & 0x3f];
+	*p++ = _crypt_a64[(l >> 12) & 0x3f];
+	*p++ = _crypt_a64[(l >> 6) & 0x3f];
+	*p++ = _crypt_a64[l & 0x3f];
+
+	l = (r0 << 16) | ((r1 >> 16) & 0xffff);
+	*p++ = _crypt_a64[(l >> 18) & 0x3f];
+	*p++ = _crypt_a64[(l >> 12) & 0x3f];
+	*p++ = _crypt_a64[(l >> 6) & 0x3f];
+	*p++ = _crypt_a64[l & 0x3f];
+
+	l = r1 << 2;
+	*p++ = _crypt_a64[(l >> 12) & 0x3f];
+	*p++ = _crypt_a64[(l >> 6) & 0x3f];
+	*p++ = _crypt_a64[l & 0x3f];
+	*p = 0;
+
+	return output;
+}