unsplice crypt.c and morecrypt.c; start to document some bcrypt and md5crypt

things in crypt.3, and create MLINKS

4 files changed, 67 insertions, 658 deletions

diff --git a/lib/libc/crypt/Makefile.inc b/lib/libc/crypt/Makefile.inc
index e64117fbd71..b65d64d7708 100644
--- a/lib/libc/crypt/Makefile.inc
+++ b/lib/libc/crypt/Makefile.inc
@@ -1,12 +1,13 @@
-#	$OpenBSD: Makefile.inc,v 1.13 1999/11/17 05:22:36 millert Exp $
+#	$OpenBSD: Makefile.inc,v 1.14 2003/08/07 00:32:12 deraadt Exp $
 
 .PATH: ${LIBCSRCDIR}/arch/${MACHINE_ARCH}/crypt ${LIBCSRCDIR}/crypt
 
-SRCS+=	cast.c crypt.c morecrypt.c md5crypt.c arc4random.c blowfish.c
+SRCS+=	cast.c crypt.c md5crypt.c arc4random.c blowfish.c
 SRCS+=  bcrypt.c skipjack.c
 
 MAN+=	crypt.3 blowfish.3 arc4random.3
 MLINKS+=crypt.3 encrypt.3 crypt.3 setkey.3 crypt.3 des_cipher.3
+MLINKS+=crypt.3 bcrypt_gensalt.3 crypt.3 bcrypt.3 crypt.3 md5crypt.3
 MLINKS+=crypt.3 des_setkey.3 blowfish.3 blf_key.3 blowfish.3 blf_enc.3
 MLINKS+=blowfish.3 blf_dec.3 blowfish.3 blf_ecb_encrypt.3
 MLINKS+=blowfish.3 blf_ecb_decrypt.3 blowfish.3 blf_cbc_encrypt.3
diff --git a/lib/libc/crypt/crypt.3 b/lib/libc/crypt/crypt.3
index f456cca7d32..32109dfac3f 100644
--- a/lib/libc/crypt/crypt.3
+++ b/lib/libc/crypt/crypt.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: crypt.3,v 1.20 2003/05/30 13:06:02 jmc Exp $
+.\" $OpenBSD: crypt.3,v 1.21 2003/08/07 00:32:12 deraadt Exp $
 .\"
 .\" FreeSec: libcrypt
 .\"
@@ -53,6 +53,12 @@
 .Fn des_setkey "const char *key"
 .Ft int
 .Fn des_cipher "const char *in" "char *out" "int32_t salt" "int count"
+.Ft char *
+.Fn bcrypt_gensalt "u_int8_t log_rounds"
+.Ft char *
+.Fn bcrypt "const char *key" "const char *salt"
+.Ft char *
+.Fn md5crypt "const char *key" "const char *salt"
 .Sh DESCRIPTION
 The
 .Fn crypt
diff --git a/lib/libc/crypt/crypt.c b/lib/libc/crypt/crypt.c
index 17b50b7f522..7f07f4e7eef 100644
--- a/lib/libc/crypt/crypt.c
+++ b/lib/libc/crypt/crypt.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: crypt.c,v 1.16 2002/04/29 06:26:50 pvalchev Exp $	*/
+/*	$OpenBSD: crypt.c,v 1.17 2003/08/07 00:32:12 deraadt Exp $	*/
 
 /*
  * FreeSec: libcrypt
@@ -44,20 +44,16 @@
  * 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.
- *
- * NOTE:
- * This file has a static version of des_setkey() so that crypt.o exports
- * only the crypt() interface. This is required to make binaries linked
- * against crypt.o exportable or re-exportable from the USA.
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: crypt.c,v 1.16 2002/04/29 06:26:50 pvalchev Exp $";
+static char rcsid[] = "$OpenBSD: crypt.c,v 1.17 2003/08/07 00:32:12 deraadt Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>
 #include <sys/param.h>
 #include <pwd.h>
+#include <unistd.h>
 #include <string.h>
 
 #ifdef DEBUG
@@ -189,8 +185,7 @@ static u_char	ascii64[] =
 /*	  0123456789012345678901234567890123456789012345678901234567890123 */
 
 static __inline int
-ascii_to_bin(ch)
-	char ch;
+ascii_to_bin(char ch)
 {
 	if (ch > 'z')
 		return(0);
@@ -208,7 +203,7 @@ ascii_to_bin(ch)
 }
 
 static void
-des_init()
+des_init(void)
 {
 	int	i, j, b, k, inbit, obit;
 	u_int32_t	*p, *il, *ir, *fl, *fr;
@@ -338,8 +333,7 @@ des_init()
 }
 
 static void
-setup_salt(salt)
-	int32_t salt;
+setup_salt(int32_t salt)
 {
 	u_int32_t	obit, saltbit;
 	int	i;
@@ -359,9 +353,8 @@ setup_salt(salt)
 	}
 }
 
-static int
-des_setkey(key)
-	const char *key;
+int
+des_setkey(const char *key)
 {
 	u_int32_t k0, k1, rawkey0, rawkey1;
 	int	shifts, round;
@@ -441,9 +434,8 @@ des_setkey(key)
 }
 
 static int
-do_des(l_in, r_in, l_out, r_out, count)
-	u_int32_t l_in, r_in, *l_out, *r_out;
-	int count;
+do_des(u_int32_t l_in, u_int32_t r_in, u_int32_t *l_out, u_int32_t *r_out,
+    int count)
 {
 	/*
 	 *	l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
@@ -558,12 +550,8 @@ do_des(l_in, r_in, l_out, r_out, count)
 	return(0);
 }
 
-static int
-des_cipher(in, out, salt, count)
-	const char *in;
-	char *out;
-	int32_t salt;
-	int count;
+int
+des_cipher(const char *in, char *out, int32_t salt, int count)
 {
 	u_int32_t l_out, r_out, rawl, rawr;
 	u_int32_t x[2];
@@ -586,9 +574,7 @@ des_cipher(in, out, salt, count)
 }
 
 char *
-crypt(key, setting)
-	const char *key;
-	const char *setting;
+crypt(const char *key, const char *setting)
 {
 	int		i;
 	u_int32_t	count, salt, l, r0, r1, keybuf[2];
@@ -683,6 +669,7 @@ crypt(key, setting)
 		p = output + 2;
 	}
 	setup_salt(salt);
+
 	/*
 	 * Do it.
 	 */
@@ -711,3 +698,46 @@ crypt(key, setting)
 
 	return((char *)output);
 }
+
+int
+setkey(const char *key)
+{
+	int	i, j;
+	u_int32_t packed_keys[2];
+	u_char	*p;
+
+	p = (u_char *) packed_keys;
+
+	for (i = 0; i < 8; i++) {
+		p[i] = 0;
+		for (j = 0; j < 8; j++)
+			if (*key++ & 1)
+				p[i] |= bits8[j];
+	}
+	return(des_setkey(p));
+}
+
+int
+encrypt(char *block, int flag)
+{
+	u_int32_t io[2];
+	u_char	*p;
+	int	i, j, retval;
+
+	if (!des_initialised)
+		des_init();
+
+	setup_salt(0);
+	p = (u_char *)block;
+	for (i = 0; i < 2; i++) {
+		io[i] = 0L;
+		for (j = 0; j < 32; j++)
+			if (*p++ & 1)
+				io[i] |= bits32[j];
+	}
+	retval = do_des(io[0], io[1], io, io + 1, flag ? -1 : 1);
+	for (i = 0; i < 2; i++)
+		for (j = 0; j < 32; j++)
+			block[(i << 5) | j] = (io[i] & bits32[j]) ? 1 : 0;
+	return(retval);
+}
diff --git a/lib/libc/crypt/morecrypt.c b/lib/libc/crypt/morecrypt.c
deleted file mode 100644
index e9e0ced4c14..00000000000
--- a/lib/libc/crypt/morecrypt.c
+++ /dev/null
@@ -1,628 +0,0 @@
-/*	$OpenBSD: morecrypt.c,v 1.9 1998/03/22 19:01:20 niklas Exp $	*/
-
-/*
- * FreeSec: libcrypt
- *
- * Copyright (c) 1994 David Burren
- * All rights reserved.
- *
- * 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.
- * 4. 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.
- *
- *
- * 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.
- *
- * NOTE:
- * This file must copy certain chunks of crypt.c for legal reasons.
- * crypt.c can only export the interface crypt(), to make binaries
- * exportable from the USA. Hence, to also have the other crypto interfaces
- * available we have to copy pieces...
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: morecrypt.c,v 1.9 1998/03/22 19:01:20 niklas Exp $";
-#endif /* LIBC_SCCS and not lint */
-
-#include <sys/types.h>
-#include <sys/param.h>
-#include <pwd.h>
-#include <string.h>
-
-#ifdef DEBUG
-# include <stdio.h>
-#endif
-
-static u_char	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 u_char	inv_key_perm[64];
-static u_char	u_key_perm[56];
-static u_char	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 u_char	key_shifts[16] = {
-	1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
-};
-
-static u_char	inv_comp_perm[56];
-static u_char	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 u_char	u_sbox[8][64];
-static u_char	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 u_char	un_pbox[32];
-static u_char	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 u_int32_t 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 u_char	bits8[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
-
-static u_int32_t saltbits;
-static int32_t	old_salt;
-static u_int32_t *bits28, *bits24;
-static u_char	init_perm[64], final_perm[64];
-static u_int32_t en_keysl[16], en_keysr[16];
-static u_int32_t de_keysl[16], de_keysr[16];
-static int	des_initialised = 0;
-static u_char	m_sbox[4][4096];
-static u_int32_t psbox[4][256];
-static u_int32_t ip_maskl[8][256], ip_maskr[8][256];
-static u_int32_t fp_maskl[8][256], fp_maskr[8][256];
-static u_int32_t key_perm_maskl[8][128], key_perm_maskr[8][128];
-static u_int32_t comp_maskl[8][128], comp_maskr[8][128];
-static u_int32_t old_rawkey0, old_rawkey1;
-
-static __inline int
-ascii_to_bin(ch)
-	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);
-}
-
-void
-des_init()
-{
-	int	i, j, b, k, inbit, obit;
-	u_int32_t	*p, *il, *ir, *fl, *fr;
-
-	old_rawkey0 = old_rawkey1 = 0;
-	saltbits = 0;
-	old_salt = 0;
-	bits24 = (bits28 = 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]) = 0;
-			*(ir = &ip_maskr[k][i]) = 0;
-			*(fl = &fp_maskl[k][i]) = 0;
-			*(fr = &fp_maskr[k][i]) = 0;
-			for (j = 0; j < 8; j++) {
-				inbit = 8 * k + j;
-				if (i & bits8[j]) {
-					if ((obit = init_perm[inbit]) < 32)
-						*il |= bits32[obit];
-					else
-						*ir |= bits32[obit-32];
-					if ((obit = final_perm[inbit]) < 32)
-						*fl |= bits32[obit];
-					else
-						*fr |= bits32[obit - 32];
-				}
-			}
-		}
-		for (i = 0; i < 128; i++) {
-			*(il = &key_perm_maskl[k][i]) = 0;
-			*(ir = &key_perm_maskr[k][i]) = 0;
-			for (j = 0; j < 7; j++) {
-				inbit = 8 * k + j;
-				if (i & 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]) = 0;
-			*(ir = &comp_maskr[k][i]) = 0;
-			for (j = 0; j < 7; j++) {
-				inbit = 7 * k + j;
-				if (i & 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]) = 0;
-			for (j = 0; j < 8; j++) {
-				if (i & bits8[j])
-					*p |= bits32[un_pbox[8 * b + j]];
-			}
-		}
-
-	des_initialised = 1;
-}
-
-void
-setup_salt(salt)
-	int32_t salt;
-{
-	u_int32_t	obit, saltbit;
-	int	i;
-
-	if (salt == old_salt)
-		return;
-	old_salt = salt;
-
-	saltbits = 0;
-	saltbit = 1;
-	obit = 0x800000;
-	for (i = 0; i < 24; i++) {
-		if (salt & saltbit)
-			saltbits |= obit;
-		saltbit <<= 1;
-		obit >>= 1;
-	}
-}
-
-int
-do_des(l_in, r_in, l_out, r_out, count)
-	u_int32_t l_in, r_in, *l_out, *r_out;
-	int count;
-{
-	/*
-	 *	l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
-	 */
-	u_int32_t	l, r, *kl, *kr, *kl1, *kr1;
-	u_int32_t	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--) {
-		/*
-		 * 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);
-}
-
-int
-des_cipher(in, out, salt, count)
-	const char *in;
-	char *out;
-	long salt;
-	int count;
-{
-	u_int32_t l_out, r_out, rawl, rawr;
-	u_int32_t x[2];
-	int	retval;
-
-	if (!des_initialised)
-		des_init();
-
-	setup_salt((int32_t)salt);
-
-	memcpy(x, in, sizeof x);
-	rawl = ntohl(x[0]);
-	rawr = ntohl(x[1]);
-	retval = do_des(rawl, rawr, &l_out, &r_out, count);
-
-	x[0] = htonl(l_out);
-	x[1] = htonl(r_out);
-	memcpy(out, x, sizeof x);
-	return(retval);
-}
-
-int
-des_setkey(key)
-	const char *key;
-{
-	u_int32_t k0, k1, rawkey0, rawkey1;
-	int	shifts, round;
-
-	if (!des_initialised)
-		des_init();
-
-	rawkey0 = ntohl(*(u_int32_t *) key);
-	rawkey1 = ntohl(*(u_int32_t *) (key + 4));
-
-	if ((rawkey0 | rawkey1)
-	    && rawkey0 == old_rawkey0
-	    && rawkey1 == old_rawkey1) {
-		/*
-		 * Already setup for this key.
-		 * This optimisation 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++) {
-		u_int32_t	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);
-}
-
-int
-setkey(key)
-	const char *key;
-{
-	int	i, j;
-	u_int32_t packed_keys[2];
-	u_char	*p;
-
-	p = (u_char *) packed_keys;
-
-	for (i = 0; i < 8; i++) {
-		p[i] = 0;
-		for (j = 0; j < 8; j++)
-			if (*key++ & 1)
-				p[i] |= bits8[j];
-	}
-	return(des_setkey(p));
-}
-
-int
-encrypt(block, flag)
-	char *block;
-	int flag;
-{
-	u_int32_t io[2];
-	u_char	*p;
-	int	i, j, retval;
-
-	if (!des_initialised)
-		des_init();
-
-	setup_salt((int32_t)0);
-	p = (u_char *)block;
-	for (i = 0; i < 2; i++) {
-		io[i] = 0L;
-		for (j = 0; j < 32; j++)
-			if (*p++ & 1)
-				io[i] |= bits32[j];
-	}
-	retval = do_des(io[0], io[1], io, io + 1, flag ? -1 : 1);
-	for (i = 0; i < 2; i++)
-		for (j = 0; j < 32; j++)
-			block[(i << 5) | j] = (io[i] & bits32[j]) ? 1 : 0;
-	return(retval);
-}