aboutsummaryrefslogtreecommitdiff
path: root/crypt/crypt_util.c
diff options
context:
space:
mode:
Diffstat (limited to 'crypt/crypt_util.c')
-rw-r--r--crypt/crypt_util.c911
1 files changed, 911 insertions, 0 deletions
diff --git a/crypt/crypt_util.c b/crypt/crypt_util.c
new file mode 100644
index 0000000000..1eb2d4cc63
--- /dev/null
+++ b/crypt/crypt_util.c
@@ -0,0 +1,911 @@
+/*
+ * UFC-crypt: ultra fast crypt(3) implementation
+ *
+ * Copyright (C) 1991, 92, 93, 96, 97, 98, 2000 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; see the file COPYING.LIB. If not,
+ * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * @(#)crypt_util.c 2.56 12/20/96
+ *
+ * Support routines
+ *
+ */
+
+#ifdef DEBUG
+#include <stdio.h>
+#endif
+#include <string.h>
+
+#ifndef STATIC
+#define STATIC static
+#endif
+
+#ifndef DOS
+#include "ufc-crypt.h"
+#else
+/*
+ * Thanks to greg%wind@plains.NoDak.edu (Greg W. Wettstein)
+ * for DOS patches
+ */
+#include "pl.h"
+#include "ufc.h"
+#endif
+#include "crypt.h"
+#include "crypt-private.h"
+
+/* Prototypes for local functions. */
+#if __STDC__ - 0
+#ifndef __GNU_LIBRARY__
+void _ufc_clearmem (char *start, int cnt);
+void _ufc_copymem (char *from, char *to, int cnt);
+#endif
+#ifdef _UFC_32_
+STATIC void shuffle_sb (long32 *k, ufc_long saltbits);
+#else
+STATIC void shuffle_sb (long64 *k, ufc_long saltbits);
+#endif
+#endif
+
+
+/*
+ * Permutation done once on the 56 bit
+ * key derived from the original 8 byte ASCII key.
+ */
+static const int pc1[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
+};
+
+/*
+ * How much to rotate each 28 bit half of the pc1 permutated
+ * 56 bit key before using pc2 to give the i' key
+ */
+static const int rots[16] = {
+ 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
+};
+
+/*
+ * Permutation giving the key
+ * of the i' DES round
+ */
+static const int pc2[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
+};
+
+/*
+ * The E expansion table which selects
+ * bits from the 32 bit intermediate result.
+ */
+static const int esel[48] = {
+ 32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9,
+ 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,
+ 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25,
+ 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1
+};
+
+/*
+ * Permutation done on the
+ * result of sbox lookups
+ */
+static const int perm32[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
+};
+
+/*
+ * The sboxes
+ */
+static const int sbox[8][4][16]= {
+ { { 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 }
+ }
+};
+
+/*
+ * This is the initial
+ * permutation matrix
+ */
+static const int initial_perm[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
+};
+
+/*
+ * This is the final
+ * permutation matrix
+ */
+static const int final_perm[64] = {
+ 40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31,
+ 38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29,
+ 36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27,
+ 34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25
+};
+
+#define ascii_to_bin(c) ((c)>='a'?(c-59):(c)>='A'?((c)-53):(c)-'.')
+#define bin_to_ascii(c) ((c)>=38?((c)-38+'a'):(c)>=12?((c)-12+'A'):(c)+'.')
+
+static const ufc_long BITMASK[24] = {
+ 0x40000000, 0x20000000, 0x10000000, 0x08000000, 0x04000000, 0x02000000,
+ 0x01000000, 0x00800000, 0x00400000, 0x00200000, 0x00100000, 0x00080000,
+ 0x00004000, 0x00002000, 0x00001000, 0x00000800, 0x00000400, 0x00000200,
+ 0x00000100, 0x00000080, 0x00000040, 0x00000020, 0x00000010, 0x00000008
+};
+
+static const unsigned char bytemask[8] = {
+ 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01
+};
+
+static const ufc_long longmask[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
+};
+
+/*
+ * do_pc1: permform pc1 permutation in the key schedule generation.
+ *
+ * The first index is the byte number in the 8 byte ASCII key
+ * - second - - the two 28 bits halfs of the result
+ * - third - selects the 7 bits actually used of each byte
+ *
+ * The result is kept with 28 bit per 32 bit with the 4 most significant
+ * bits zero.
+ */
+static ufc_long do_pc1[8][2][128];
+
+/*
+ * do_pc2: permform pc2 permutation in the key schedule generation.
+ *
+ * The first index is the septet number in the two 28 bit intermediate values
+ * - second - - - septet values
+ *
+ * Knowledge of the structure of the pc2 permutation is used.
+ *
+ * The result is kept with 28 bit per 32 bit with the 4 most significant
+ * bits zero.
+ */
+static ufc_long do_pc2[8][128];
+
+/*
+ * eperm32tab: do 32 bit permutation and E selection
+ *
+ * The first index is the byte number in the 32 bit value to be permuted
+ * - second - is the value of this byte
+ * - third - selects the two 32 bit values
+ *
+ * The table is used and generated internally in init_des to speed it up
+ */
+static ufc_long eperm32tab[4][256][2];
+
+/*
+ * efp: undo an extra e selection and do final
+ * permutation giving the DES result.
+ *
+ * Invoked 6 bit a time on two 48 bit values
+ * giving two 32 bit longs.
+ */
+static ufc_long efp[16][64][2];
+
+/*
+ * For use by the old, non-reentrant routines
+ * (crypt/encrypt/setkey)
+ */
+struct crypt_data _ufc_foobar;
+
+#ifdef __GNU_LIBRARY__
+#include <bits/libc-lock.h>
+
+__libc_lock_define_initialized (static, _ufc_tables_lock)
+#endif
+
+#ifdef DEBUG
+
+void
+_ufc_prbits(a, n)
+ ufc_long *a;
+ int n;
+{
+ ufc_long i, j, t, tmp;
+ n /= 8;
+ for(i = 0; i < n; i++) {
+ tmp=0;
+ for(j = 0; j < 8; j++) {
+ t=8*i+j;
+ tmp|=(a[t/24] & BITMASK[t % 24])?bytemask[j]:0;
+ }
+ (void)printf("%02x ",tmp);
+ }
+ printf(" ");
+}
+
+static void
+_ufc_set_bits(v, b)
+ ufc_long v;
+ ufc_long *b;
+{
+ ufc_long i;
+ *b = 0;
+ for(i = 0; i < 24; i++) {
+ if(v & longmask[8 + i])
+ *b |= BITMASK[i];
+ }
+}
+
+#endif
+
+#ifndef __GNU_LIBRARY__
+/*
+ * Silly rewrites of 'bzero'/'memset'. I do so
+ * because some machines don't have
+ * bzero and some don't have memset.
+ */
+
+void
+_ufc_clearmem(start, cnt)
+ char *start;
+ int cnt;
+{
+ while(cnt--)
+ *start++ = '\0';
+}
+
+void
+_ufc_copymem(from, to, cnt)
+ char *from, *to;
+ int cnt;
+{
+ while(cnt--)
+ *to++ = *from++;
+}
+#else
+#define _ufc_clearmem(start, cnt) memset(start, 0, cnt)
+#define _ufc_copymem(from, to, cnt) memcpy(to, from, cnt)
+#endif
+
+/* lookup a 6 bit value in sbox */
+
+#define s_lookup(i,s) sbox[(i)][(((s)>>4) & 0x2)|((s) & 0x1)][((s)>>1) & 0xf];
+
+/*
+ * Initialize unit - may be invoked directly
+ * by fcrypt users.
+ */
+
+void
+__init_des_r(__data)
+ struct crypt_data * __restrict __data;
+{
+ int comes_from_bit;
+ int bit, sg;
+ ufc_long j;
+ ufc_long mask1, mask2;
+ int e_inverse[64];
+ static volatile int small_tables_initialized = 0;
+
+#ifdef _UFC_32_
+ long32 *sb[4];
+ sb[0] = (long32*)__data->sb0; sb[1] = (long32*)__data->sb1;
+ sb[2] = (long32*)__data->sb2; sb[3] = (long32*)__data->sb3;
+#endif
+#ifdef _UFC_64_
+ long64 *sb[4];
+ sb[0] = (long64*)__data->sb0; sb[1] = (long64*)__data->sb1;
+ sb[2] = (long64*)__data->sb2; sb[3] = (long64*)__data->sb3;
+#endif
+
+ if(small_tables_initialized == 0) {
+#ifdef __GNU_LIBRARY__
+ __libc_lock_lock (_ufc_tables_lock);
+ if(small_tables_initialized)
+ goto small_tables_done;
+#endif
+
+ /*
+ * Create the do_pc1 table used
+ * to affect pc1 permutation
+ * when generating keys
+ */
+ _ufc_clearmem((char*)do_pc1, (int)sizeof(do_pc1));
+ for(bit = 0; bit < 56; bit++) {
+ comes_from_bit = pc1[bit] - 1;
+ mask1 = bytemask[comes_from_bit % 8 + 1];
+ mask2 = longmask[bit % 28 + 4];
+ for(j = 0; j < 128; j++) {
+ if(j & mask1)
+ do_pc1[comes_from_bit / 8][bit / 28][j] |= mask2;
+ }
+ }
+
+ /*
+ * Create the do_pc2 table used
+ * to affect pc2 permutation when
+ * generating keys
+ */
+ _ufc_clearmem((char*)do_pc2, (int)sizeof(do_pc2));
+ for(bit = 0; bit < 48; bit++) {
+ comes_from_bit = pc2[bit] - 1;
+ mask1 = bytemask[comes_from_bit % 7 + 1];
+ mask2 = BITMASK[bit % 24];
+ for(j = 0; j < 128; j++) {
+ if(j & mask1)
+ do_pc2[comes_from_bit / 7][j] |= mask2;
+ }
+ }
+
+ /*
+ * Now generate the table used to do combined
+ * 32 bit permutation and e expansion
+ *
+ * We use it because we have to permute 16384 32 bit
+ * longs into 48 bit in order to initialize sb.
+ *
+ * Looping 48 rounds per permutation becomes
+ * just too slow...
+ *
+ */
+
+ _ufc_clearmem((char*)eperm32tab, (int)sizeof(eperm32tab));
+ for(bit = 0; bit < 48; bit++) {
+ ufc_long mask1,comes_from;
+ comes_from = perm32[esel[bit]-1]-1;
+ mask1 = bytemask[comes_from % 8];
+ for(j = 256; j--;) {
+ if(j & mask1)
+ eperm32tab[comes_from / 8][j][bit / 24] |= BITMASK[bit % 24];
+ }
+ }
+
+ /*
+ * Create an inverse matrix for esel telling
+ * where to plug out bits if undoing it
+ */
+ for(bit=48; bit--;) {
+ e_inverse[esel[bit] - 1 ] = bit;
+ e_inverse[esel[bit] - 1 + 32] = bit + 48;
+ }
+
+ /*
+ * create efp: the matrix used to
+ * undo the E expansion and effect final permutation
+ */
+ _ufc_clearmem((char*)efp, (int)sizeof efp);
+ for(bit = 0; bit < 64; bit++) {
+ int o_bit, o_long;
+ ufc_long word_value, mask1, mask2;
+ int comes_from_f_bit, comes_from_e_bit;
+ int comes_from_word, bit_within_word;
+
+ /* See where bit i belongs in the two 32 bit long's */
+ o_long = bit / 32; /* 0..1 */
+ o_bit = bit % 32; /* 0..31 */
+
+ /*
+ * And find a bit in the e permutated value setting this bit.
+ *
+ * Note: the e selection may have selected the same bit several
+ * times. By the initialization of e_inverse, we only look
+ * for one specific instance.
+ */
+ comes_from_f_bit = final_perm[bit] - 1; /* 0..63 */
+ comes_from_e_bit = e_inverse[comes_from_f_bit]; /* 0..95 */
+ comes_from_word = comes_from_e_bit / 6; /* 0..15 */
+ bit_within_word = comes_from_e_bit % 6; /* 0..5 */
+
+ mask1 = longmask[bit_within_word + 26];
+ mask2 = longmask[o_bit];
+
+ for(word_value = 64; word_value--;) {
+ if(word_value & mask1)
+ efp[comes_from_word][word_value][o_long] |= mask2;
+ }
+ }
+ small_tables_initialized = 1;
+#ifdef __GNU_LIBRARY__
+small_tables_done:
+ __libc_lock_unlock(_ufc_tables_lock);
+#endif
+ }
+
+ /*
+ * Create the sb tables:
+ *
+ * For each 12 bit segment of an 48 bit intermediate
+ * result, the sb table precomputes the two 4 bit
+ * values of the sbox lookups done with the two 6
+ * bit halves, shifts them to their proper place,
+ * sends them through perm32 and finally E expands
+ * them so that they are ready for the next
+ * DES round.
+ *
+ */
+
+ _ufc_clearmem((char*)__data->sb0, (int)sizeof(__data->sb0));
+ _ufc_clearmem((char*)__data->sb1, (int)sizeof(__data->sb1));
+ _ufc_clearmem((char*)__data->sb2, (int)sizeof(__data->sb2));
+ _ufc_clearmem((char*)__data->sb3, (int)sizeof(__data->sb3));
+
+ for(sg = 0; sg < 4; sg++) {
+ int j1, j2;
+ int s1, s2;
+
+ for(j1 = 0; j1 < 64; j1++) {
+ s1 = s_lookup(2 * sg, j1);
+ for(j2 = 0; j2 < 64; j2++) {
+ ufc_long to_permute, inx;
+
+ s2 = s_lookup(2 * sg + 1, j2);
+ to_permute = (((ufc_long)s1 << 4) |
+ (ufc_long)s2) << (24 - 8 * (ufc_long)sg);
+
+#ifdef _UFC_32_
+ inx = ((j1 << 6) | j2) << 1;
+ sb[sg][inx ] = eperm32tab[0][(to_permute >> 24) & 0xff][0];
+ sb[sg][inx+1] = eperm32tab[0][(to_permute >> 24) & 0xff][1];
+ sb[sg][inx ] |= eperm32tab[1][(to_permute >> 16) & 0xff][0];
+ sb[sg][inx+1] |= eperm32tab[1][(to_permute >> 16) & 0xff][1];
+ sb[sg][inx ] |= eperm32tab[2][(to_permute >> 8) & 0xff][0];
+ sb[sg][inx+1] |= eperm32tab[2][(to_permute >> 8) & 0xff][1];
+ sb[sg][inx ] |= eperm32tab[3][(to_permute) & 0xff][0];
+ sb[sg][inx+1] |= eperm32tab[3][(to_permute) & 0xff][1];
+#endif
+#ifdef _UFC_64_
+ inx = ((j1 << 6) | j2);
+ sb[sg][inx] =
+ ((long64)eperm32tab[0][(to_permute >> 24) & 0xff][0] << 32) |
+ (long64)eperm32tab[0][(to_permute >> 24) & 0xff][1];
+ sb[sg][inx] |=
+ ((long64)eperm32tab[1][(to_permute >> 16) & 0xff][0] << 32) |
+ (long64)eperm32tab[1][(to_permute >> 16) & 0xff][1];
+ sb[sg][inx] |=
+ ((long64)eperm32tab[2][(to_permute >> 8) & 0xff][0] << 32) |
+ (long64)eperm32tab[2][(to_permute >> 8) & 0xff][1];
+ sb[sg][inx] |=
+ ((long64)eperm32tab[3][(to_permute) & 0xff][0] << 32) |
+ (long64)eperm32tab[3][(to_permute) & 0xff][1];
+#endif
+ }
+ }
+ }
+
+ __data->initialized++;
+}
+
+void
+__init_des()
+{
+ __init_des_r(&_ufc_foobar);
+}
+
+/*
+ * Process the elements of the sb table permuting the
+ * bits swapped in the expansion by the current salt.
+ */
+
+#ifdef _UFC_32_
+STATIC void
+shuffle_sb(k, saltbits)
+ long32 *k;
+ ufc_long saltbits;
+{
+ ufc_long j;
+ long32 x;
+ for(j=4096; j--;) {
+ x = (k[0] ^ k[1]) & (long32)saltbits;
+ *k++ ^= x;
+ *k++ ^= x;
+ }
+}
+#endif
+
+#ifdef _UFC_64_
+STATIC void
+shuffle_sb(k, saltbits)
+ long64 *k;
+ ufc_long saltbits;
+{
+ ufc_long j;
+ long64 x;
+ for(j=4096; j--;) {
+ x = ((*k >> 32) ^ *k) & (long64)saltbits;
+ *k++ ^= (x << 32) | x;
+ }
+}
+#endif
+
+/*
+ * Setup the unit for a new salt
+ * Hopefully we'll not see a new salt in each crypt call.
+ */
+
+void
+_ufc_setup_salt_r(s, __data)
+ __const char *s;
+ struct crypt_data * __restrict __data;
+{
+ ufc_long i, j, saltbits;
+
+ if(__data->initialized == 0)
+ __init_des_r(__data);
+
+ if(s[0] == __data->current_salt[0] && s[1] == __data->current_salt[1])
+ return;
+ __data->current_salt[0] = s[0]; __data->current_salt[1] = s[1];
+
+ /*
+ * This is the only crypt change to DES:
+ * entries are swapped in the expansion table
+ * according to the bits set in the salt.
+ */
+ saltbits = 0;
+ for(i = 0; i < 2; i++) {
+ long c=ascii_to_bin(s[i]);
+ for(j = 0; j < 6; j++) {
+ if((c >> j) & 0x1)
+ saltbits |= BITMASK[6 * i + j];
+ }
+ }
+
+ /*
+ * Permute the sb table values
+ * to reflect the changed e
+ * selection table
+ */
+#ifdef _UFC_32_
+#define LONGG long32*
+#endif
+#ifdef _UFC_64_
+#define LONGG long64*
+#endif
+
+ shuffle_sb((LONGG)__data->sb0, __data->current_saltbits ^ saltbits);
+ shuffle_sb((LONGG)__data->sb1, __data->current_saltbits ^ saltbits);
+ shuffle_sb((LONGG)__data->sb2, __data->current_saltbits ^ saltbits);
+ shuffle_sb((LONGG)__data->sb3, __data->current_saltbits ^ saltbits);
+
+ __data->current_saltbits = saltbits;
+}
+
+void
+_ufc_mk_keytab_r(key, __data)
+ const char *key;
+ struct crypt_data * __restrict __data;
+{
+ ufc_long v1, v2, *k1;
+ int i;
+#ifdef _UFC_32_
+ long32 v, *k2;
+ k2 = (long32*)__data->keysched;
+#endif
+#ifdef _UFC_64_
+ long64 v, *k2;
+ k2 = (long64*)__data->keysched;
+#endif
+
+ v1 = v2 = 0; k1 = &do_pc1[0][0][0];
+ for(i = 8; i--;) {
+ v1 |= k1[*key & 0x7f]; k1 += 128;
+ v2 |= k1[*key++ & 0x7f]; k1 += 128;
+ }
+
+ for(i = 0; i < 16; i++) {
+ k1 = &do_pc2[0][0];
+
+ v1 = (v1 << rots[i]) | (v1 >> (28 - rots[i]));
+ v = k1[(v1 >> 21) & 0x7f]; k1 += 128;
+ v |= k1[(v1 >> 14) & 0x7f]; k1 += 128;
+ v |= k1[(v1 >> 7) & 0x7f]; k1 += 128;
+ v |= k1[(v1 ) & 0x7f]; k1 += 128;
+
+#ifdef _UFC_32_
+ *k2++ = (v | 0x00008000);
+ v = 0;
+#endif
+#ifdef _UFC_64_
+ v = (v << 32);
+#endif
+
+ v2 = (v2 << rots[i]) | (v2 >> (28 - rots[i]));
+ v |= k1[(v2 >> 21) & 0x7f]; k1 += 128;
+ v |= k1[(v2 >> 14) & 0x7f]; k1 += 128;
+ v |= k1[(v2 >> 7) & 0x7f]; k1 += 128;
+ v |= k1[(v2 ) & 0x7f];
+
+#ifdef _UFC_32_
+ *k2++ = (v | 0x00008000);
+#endif
+#ifdef _UFC_64_
+ *k2++ = v | 0x0000800000008000l;
+#endif
+ }
+
+ __data->direction = 0;
+}
+
+/*
+ * Undo an extra E selection and do final permutations
+ */
+
+void
+_ufc_dofinalperm_r(res, __data)
+ ufc_long *res;
+ struct crypt_data * __restrict __data;
+{
+ ufc_long v1, v2, x;
+ ufc_long l1,l2,r1,r2;
+
+ l1 = res[0]; l2 = res[1];
+ r1 = res[2]; r2 = res[3];
+
+ x = (l1 ^ l2) & __data->current_saltbits; l1 ^= x; l2 ^= x;
+ x = (r1 ^ r2) & __data->current_saltbits; r1 ^= x; r2 ^= x;
+
+ v1=v2=0; l1 >>= 3; l2 >>= 3; r1 >>= 3; r2 >>= 3;
+
+ v1 |= efp[15][ r2 & 0x3f][0]; v2 |= efp[15][ r2 & 0x3f][1];
+ v1 |= efp[14][(r2 >>= 6) & 0x3f][0]; v2 |= efp[14][ r2 & 0x3f][1];
+ v1 |= efp[13][(r2 >>= 10) & 0x3f][0]; v2 |= efp[13][ r2 & 0x3f][1];
+ v1 |= efp[12][(r2 >>= 6) & 0x3f][0]; v2 |= efp[12][ r2 & 0x3f][1];
+
+ v1 |= efp[11][ r1 & 0x3f][0]; v2 |= efp[11][ r1 & 0x3f][1];
+ v1 |= efp[10][(r1 >>= 6) & 0x3f][0]; v2 |= efp[10][ r1 & 0x3f][1];
+ v1 |= efp[ 9][(r1 >>= 10) & 0x3f][0]; v2 |= efp[ 9][ r1 & 0x3f][1];
+ v1 |= efp[ 8][(r1 >>= 6) & 0x3f][0]; v2 |= efp[ 8][ r1 & 0x3f][1];
+
+ v1 |= efp[ 7][ l2 & 0x3f][0]; v2 |= efp[ 7][ l2 & 0x3f][1];
+ v1 |= efp[ 6][(l2 >>= 6) & 0x3f][0]; v2 |= efp[ 6][ l2 & 0x3f][1];
+ v1 |= efp[ 5][(l2 >>= 10) & 0x3f][0]; v2 |= efp[ 5][ l2 & 0x3f][1];
+ v1 |= efp[ 4][(l2 >>= 6) & 0x3f][0]; v2 |= efp[ 4][ l2 & 0x3f][1];
+
+ v1 |= efp[ 3][ l1 & 0x3f][0]; v2 |= efp[ 3][ l1 & 0x3f][1];
+ v1 |= efp[ 2][(l1 >>= 6) & 0x3f][0]; v2 |= efp[ 2][ l1 & 0x3f][1];
+ v1 |= efp[ 1][(l1 >>= 10) & 0x3f][0]; v2 |= efp[ 1][ l1 & 0x3f][1];
+ v1 |= efp[ 0][(l1 >>= 6) & 0x3f][0]; v2 |= efp[ 0][ l1 & 0x3f][1];
+
+ res[0] = v1; res[1] = v2;
+}
+
+/*
+ * crypt only: convert from 64 bit to 11 bit ASCII
+ * prefixing with the salt
+ */
+
+void
+_ufc_output_conversion_r(v1, v2, salt, __data)
+ ufc_long v1, v2;
+ __const char *salt;
+ struct crypt_data * __restrict __data;
+{
+ int i, s, shf;
+
+ __data->crypt_3_buf[0] = salt[0];
+ __data->crypt_3_buf[1] = salt[1] ? salt[1] : salt[0];
+
+ for(i = 0; i < 5; i++) {
+ shf = (26 - 6 * i); /* to cope with MSC compiler bug */
+ __data->crypt_3_buf[i + 2] = bin_to_ascii((v1 >> shf) & 0x3f);
+ }
+
+ s = (v2 & 0xf) << 2;
+ v2 = (v2 >> 2) | ((v1 & 0x3) << 30);
+
+ for(i = 5; i < 10; i++) {
+ shf = (56 - 6 * i);
+ __data->crypt_3_buf[i + 2] = bin_to_ascii((v2 >> shf) & 0x3f);
+ }
+
+ __data->crypt_3_buf[12] = bin_to_ascii(s);
+ __data->crypt_3_buf[13] = 0;
+}
+
+
+/*
+ * UNIX encrypt function. Takes a bitvector
+ * represented by one byte per bit and
+ * encrypt/decrypt according to edflag
+ */
+
+void
+__encrypt_r(__block, __edflag, __data)
+ char *__block;
+ int __edflag;
+ struct crypt_data * __restrict __data;
+{
+ ufc_long l1, l2, r1, r2, res[4];
+ int i;
+#ifdef _UFC_32_
+ long32 *kt;
+ kt = (long32*)__data->keysched;
+#endif
+#ifdef _UFC_64_
+ long64 *kt;
+ kt = (long64*)__data->keysched;
+#endif
+
+ /*
+ * Undo any salt changes to E expansion
+ */
+ _ufc_setup_salt_r("..", __data);
+
+ /*
+ * Reverse key table if
+ * changing operation (encrypt/decrypt)
+ */
+ if((__edflag == 0) != (__data->direction == 0)) {
+ for(i = 0; i < 8; i++) {
+#ifdef _UFC_32_
+ long32 x;
+ x = kt[2 * (15-i)];
+ kt[2 * (15-i)] = kt[2 * i];
+ kt[2 * i] = x;
+
+ x = kt[2 * (15-i) + 1];
+ kt[2 * (15-i) + 1] = kt[2 * i + 1];
+ kt[2 * i + 1] = x;
+#endif
+#ifdef _UFC_64_
+ long64 x;
+ x = kt[15-i];
+ kt[15-i] = kt[i];
+ kt[i] = x;
+#endif
+ }
+ __data->direction = __edflag;
+ }
+
+ /*
+ * Do initial permutation + E expansion
+ */
+ i = 0;
+ for(l1 = 0; i < 24; i++) {
+ if(__block[initial_perm[esel[i]-1]-1])
+ l1 |= BITMASK[i];
+ }
+ for(l2 = 0; i < 48; i++) {
+ if(__block[initial_perm[esel[i]-1]-1])
+ l2 |= BITMASK[i-24];
+ }
+
+ i = 0;
+ for(r1 = 0; i < 24; i++) {
+ if(__block[initial_perm[esel[i]-1+32]-1])
+ r1 |= BITMASK[i];
+ }
+ for(r2 = 0; i < 48; i++) {
+ if(__block[initial_perm[esel[i]-1+32]-1])
+ r2 |= BITMASK[i-24];
+ }
+
+ /*
+ * Do DES inner loops + final conversion
+ */
+ res[0] = l1; res[1] = l2;
+ res[2] = r1; res[3] = r2;
+ _ufc_doit_r((ufc_long)1, __data, &res[0]);
+
+ /*
+ * Do final permutations
+ */
+ _ufc_dofinalperm_r(res, __data);
+
+ /*
+ * And convert to bit array
+ */
+ l1 = res[0]; r1 = res[1];
+ for(i = 0; i < 32; i++) {
+ *__block++ = (l1 & longmask[i]) != 0;
+ }
+ for(i = 0; i < 32; i++) {
+ *__block++ = (r1 & longmask[i]) != 0;
+ }
+}
+weak_alias (__encrypt_r, encrypt_r)
+
+void
+encrypt(__block, __edflag)
+ char *__block;
+ int __edflag;
+{
+ __encrypt_r(__block, __edflag, &_ufc_foobar);
+}
+
+
+/*
+ * UNIX setkey function. Take a 64 bit DES
+ * key and setup the machinery.
+ */
+
+void
+__setkey_r(__key, __data)
+ __const char *__key;
+ struct crypt_data * __restrict __data;
+{
+ int i,j;
+ unsigned char c;
+ unsigned char ktab[8];
+
+ _ufc_setup_salt_r("..", __data); /* be sure we're initialized */
+
+ for(i = 0; i < 8; i++) {
+ for(j = 0, c = 0; j < 8; j++)
+ c = c << 1 | *__key++;
+ ktab[i] = c >> 1;
+ }
+ _ufc_mk_keytab_r(ktab, __data);
+}
+weak_alias (__setkey_r, setkey_r)
+
+void
+setkey(__key)
+ __const char *__key;
+{
+ __setkey_r(__key, &_ufc_foobar);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 04:23:54 +0000