non-USA crypto code by davidb@werj.com.au. The source has been split

& copied into two pieces so that use of crypt() pulls in a crypt.o
that contains only that one programmer interface -- this permits USA
export of binaries that use crypt() for authentication purposes.
morecrypt.c contains the other DES programmer interfaces commonly
used.

1 files changed, 338 insertions, 0 deletions

diff --git a/src/lib/libc/crypt/morecrypt.c b/src/lib/libc/crypt/morecrypt.c
new file mode 100644
index 0000000000..85ace2ecce
--- /dev/null
+++ b/src/lib/libc/crypt/morecrypt.c
@@ -0,0 +1,338 @@
+/*      $Id: morecrypt.c,v 1.1 1995/12/16 12:55:31 deraadt 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.
+ *
+ * ARCHITECTURE ASSUMPTIONS:
+ *      This code assumes that u_longs are 32 bits.  It will probably not
+ *      operate on 64-bit machines without modifications.
+ *      It is assumed that the 8-byte arrays passed by reference can be
+ *      addressed as arrays of u_longs (ie. the CPU is not picky about
+ *      alignment).
+ *
+ * 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...
+ */
+#include <sys/types.h>
+#include <sys/param.h>
+#include <pwd.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 u_char   ascii64[] =
+         "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+/*        0000000000111111111122222222223333333333444444444455555555556666 */
+/*        0123456789012345678901234567890123456789012345678901234567890123 */
+
+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);
+}
+
+int
+des_setkey(key)
+        const char *key;
+{
+        u_int32_t k0, k1, rawkey0, rawkey1;
+        int     shifts, i, b, 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;
+                int     bit;
+
+                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)
+        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(0L);
+        p = 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);
+}