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-rw-r--r--libcrypt/des.c616
1 files changed, 327 insertions, 289 deletions
diff --git a/libcrypt/des.c b/libcrypt/des.c
index e8a77c168..22392d929 100644
--- a/libcrypt/des.c
+++ b/libcrypt/des.c
@@ -1,31 +1,48 @@
/* vi: set sw=4 ts=4: */
/*
- * Copyright (C) 2001 by Rene Müller
- * DES based crypt() implementation, originally written for dietlibc by
- * Rene Müller, based on Bruce Schneier's Applied Cryptography, but
- * tightened up quite a bit.
+ * The one and only crypt(3) function.
*
- * Copyright (C) 2001 by Erik Andersen
- * Adjusted each function to be reentrant, hacked in md5 support.
+ * This source code is derived from Minix's pwdauth.c, which was based
+ * on Andy Tanenbaum's book "Computer Networks", and then rewritten in
+ * C by Kees J. Bot, 7 Feb 1994. This code was ported from Minix to
+ * uClibc on June 28, 2001 by Manuel Novoa III, and then reshuffled to
+ * be reentrant by Erik Andersen <andersen@lineo.com> on June 28, 2001.
*
- * This program 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 of the License, or
- * (at your option) any later version.
+ * This program 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 program 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.
+ * This program 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 General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * You should have received a copy of the GNU Library General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Original copyright notice is retained at the end of this file.
*
*/
+/* This program gets as input the key and salt arguments of the crypt(3)
+ * function as two null terminated strings. The crypt result is output as
+ * one null terminated string. Input and output must be <= 1024 characters.
+ * The exit code will be 1 on any error.
+ *
+ * If the key has the form '##name' then the key will be encrypted and the
+ * result checked to be equal to the encrypted password in the shadow password
+ * file. If equal than '##name' will be returned, otherwise exit code 2.
+ *
+ * Otherwise the key will be encrypted normally and the result returned.
+ *
+ * As a special case, anything matches a null encrypted password to allow
+ * a no-password login.
+ */
+
#include <crypt.h>
#include <string.h>
#include <unistd.h>
@@ -33,298 +50,319 @@
extern char *md5_magic;
extern char * md5_crypt_r( const char *pw, const char *salt, struct crypt_data * data);
-/* Initial permutation, */
-static const char IP[] = {
- 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,
- 56,48,40,32,24,16, 8, 0,
- 58,50,42,34,26,18,10, 2,
- 60,52,44,36,28,20,12, 4,
- 62,54,46,38,30,22,14, 6
-};
+//struct block {
+// unsigned char b_data[64];
+//};
-/* Final permutation, FP = IP^(-1) */
-static const char FP[] = {
- 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,
- 32, 0,40, 8,48,16,56,24
+struct ordering {
+ unsigned char o_data[64];
};
-/* Permuted-choice 1 from the key bits to yield C and D.
- * Note that bits 8,16... are left out: They are intended for a parity check.
- */
-static const char PC1_C[] = {
- 56,48,40,32,24,16, 8,
- 0,57,49,41,33,25,17,
- 9, 1,58,50,42,34,26,
- 18,10, 2,59,51,43,35
+static const struct ordering InitialTr = { {
+ 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 const struct ordering FinalTr = { {
+ 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,
+} };
+
+static const struct ordering swap = { {
+ 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,
+ 49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,
+ 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,16,
+ 17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,
+} };
+
+static const struct ordering KeyTr1 = { {
+ 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 const struct ordering KeyTr2 = { {
+ 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,
+} };
+
+static const struct ordering etr = { {
+ 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,
+} };
+
+static const struct ordering ptr = { {
+ 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 const unsigned char s_boxes[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 const char PC1_D[] = {
- 62,54,46,38,30,22,14,
- 6,61,53,45,37,29,21,
- 13, 5,60,52,44,36,28,
- 20,12, 4,27,19,11, 3
+static const int rots[] = {
+ 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1,
};
-/* Sequence of shifts used for the key schedule. */
-static const char shifts[] = { 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1 };
+static void transpose(struct block *data, const struct ordering *t, int n)
+{
+ struct block x;
-/*
- * Permuted-choice 2, to pick out the bits from the CD array that generate
- * the key schedule.
- */
-static const char PC2_C[] = {
- 13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9,
- 22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1
-};
+ x = *data;
-static const char PC2_D[] = {
- 12, 23, 2, 8, 18, 26, 1, 11, 22, 16, 4, 19,
- 15, 20, 10, 27, 5, 24, 17, 13, 21, 7, 0, 3
-};
+ while (n-- > 0) {
+ data->b_data[n] = x.b_data[t->o_data[n] - 1];
+ }
+}
-static const char e2[] = {
- 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
-};
+static void rotate(struct block *key)
+{
+ unsigned char *p = key->b_data;
+ unsigned char *ep = &(key->b_data[55]);
+ int data0 = key->b_data[0], data28 = key->b_data[28];
-/* The 8 selection functions. For some reason, they give a 0-origin index,
- * unlike everything else.
- */
-static const char S[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
- }
-};
+ while (p++ < ep) *(p-1) = *p;
+ key->b_data[27] = data0;
+ key->b_data[55] = data28;
+}
-/* P is a permutation on the selected combination of the current L and key. */
-static const char P[] = {
- 15, 6,19,20, 28,11,27,16, 0,14,22,25, 4,17,30, 9,
- 1, 7,23,13, 31,26, 2, 8, 18,12,29, 5, 21,10, 3,24
-};
+static const struct ordering *EP = &etr;
-/* Set up the key schedule from the key. */
-void setkey_r(const char *key, struct crypt_data *data)
+static void f(int i, struct block *key, struct block *a, struct block *x)
{
- register int i, j, k;
- int t;
- int s;
-
- /* First, generate C and D by permuting the key. The low order bit of each
- * 8-bit char is not used, so C and D are only 28 bits apiece.
- */
- for(i=0; i < 28; i++) {
- data->C[i] = key[(int)PC1_C[i]];
- data->D[i] = key[(int)PC1_D[i]];
- }
- /* To generate Ki, rotate C and D according to schedule and pick up a
- * permutation using PC2.
- */
- for(i=0; i < 16; i++) {
- /* rotate. */
- s = shifts[i];
- for(k=0; k < s; k++) {
- t = data->C[0];
- for(j=0; j < 27; j++)
- data->C[j] = data->C[j+1];
- data->C[27] = t;
- t = data->D[0];
- for(j=0; j < 27; j++)
- data->D[j] = data->D[j+1];
- data->D[27] = t;
- }
- /* get Ki. Note C and D are concatenated. */
- for(j=0; j < 24; j++) {
- data->KS[i][j] = data->C[(int)PC2_C[j]];
- data->KS[i][j+24] = data->D[(int)PC2_D[j]];
- }
- }
-
- for(i=0; i < 48; i++)
- data->E[i] = e2[i];
+ struct block e, ikey, y;
+ int k;
+ unsigned char *p, *q, *r;
+
+ e = *a;
+ transpose(&e, EP, 48);
+ for (k = rots[i]; k; k--) rotate(key);
+ ikey = *key;
+ transpose(&ikey, &KeyTr2, 48);
+ p = &(y.b_data[48]);
+ q = &(e.b_data[48]);
+ r = &(ikey.b_data[48]);
+ while (p > y.b_data) {
+ *--p = *--q ^ *--r;
+ }
+ q = x->b_data;
+ for (k = 0; k < 8; k++) {
+ int xb, r;
+
+ r = *p++ << 5;
+ r += *p++ << 3;
+ r += *p++ << 2;
+ r += *p++ << 1;
+ r += *p++;
+ r += *p++ << 4;
+
+ xb = s_boxes[k][r];
+
+ *q++ = (xb >> 3) & 1;
+ *q++ = (xb>>2) & 1;
+ *q++ = (xb>>1) & 1;
+ *q++ = (xb & 1);
+ }
+ transpose(x, &ptr, 32);
}
+void setkey_r(const char *k, struct crypt_data *data)
+{
+ struct block *key = &(data->key);
+ memcpy(key, k, (sizeof(struct block)));
+ transpose(key, &KeyTr1, 56);
+}
-/* The payoff: encrypt a block. */
-void encrypt_r(char block[64], int edflag, struct crypt_data *data)
+extern void encrypt_r(char *blck, int edflag, struct crypt_data *data)
{
- int i, ii;
- register int t, j, k;
-
- /* First, permute the bits in the input */
- for(j=0; j < 64; j++)
- data->L[j] = data->block[(int)IP[j]];
- /* Perform an encryption operation 16 times. */
- for(ii=0; ii < 16; ii++) {
- i = ii;
- /* Save the R array, which will be the new L. */
- for(j=0; j < 32; j++)
- data->tempL[j] = data->R[j];
- /* Expand R to 48 bits using the E selector;
- * exclusive-or with the current key bits.
- */
- for(j=0; j < 48; j++)
- data->preS[j] = data->R[data->E[j]-1] ^ data->KS[i][j];
- /* The pre-select bits are now considered in 8 groups of 6 bits each.
- * The 8 selection functions map these 6-bit quantities into 4-bit
- * quantities and the results permuted to make an f(R, K).
- * The indexing into the selection functions is peculiar;
- * it could be simplified by rewriting the tables.
- */
- for(j=0; j < 8; j++) {
- t = ((j<<1)+j)<<1;
- k = S[j][(data->preS[t]<<5)+
- (data->preS[t+1]<<3)+
- (data->preS[t+2]<<2)+
- (data->preS[t+3]<<1)+
- (data->preS[t+4] )+
- (data->preS[t+5]<<4)];
- t = j << 2;
- data->f[t ] = (k>>3)&01;
- data->f[t+1] = (k>>2)&01;
- data->f[t+2] = (k>>1)&01;
- data->f[t+3] = (k )&01;
- }
- /* The new R is L ^ f(R, K). The f here has to be permuted first, though. */
- for(j=0; j < 32; j++)
- data->R[j] = data->L[j] ^ data->f[(int)P[j]];
- /* Finally, the new L (the original R) is copied back. */
- for(j=0; j < 32; j++)
- data->L[j] = data->tempL[j];
- }
- /* The output L and R are reversed. */
- for(j=0; j < 32; j++) {
- data->L[j] ^= data->R[j];
- data->R[j] ^= data->L[j];
- data->L[j] ^= data->R[j];
- }
- /* The final output gets the inverse permutation of the very original. */
- for(j=0; j < 64; j++)
- data->block[j] = data->L[(int)FP[j]];
+ struct block *key = &(data->key);
+ struct block *p = (struct block *) blck;
+ int i;
+
+ transpose(p, &InitialTr, 64);
+ for (i = 15; i>= 0; i--) {
+ int j = edflag ? i : 15 - i;
+ int k;
+ struct block b, x;
+
+ b = *p;
+ for (k = 31; k >= 0; k--) {
+ p->b_data[k] = b.b_data[k + 32];
+ }
+ f(j, key, p, &x);
+ for (k = 31; k >= 0; k--) {
+ p->b_data[k+32] = b.b_data[k] ^ x.b_data[k];
+ }
+ }
+ transpose(p, &swap, 64);
+ transpose(p, &FinalTr, 64);
}
-char * crypt_r(const char *pw, const char *salt, struct crypt_data *data)
+extern char *crypt_r(const char *pw, const char *salt, struct crypt_data *data)
{
- register int i, j, c;
-
-
- /* Check if we are supposed to be using the MD5 encryption replacement. */
- if (strncmp (md5_magic, salt, sizeof (md5_magic) - 1) == 0)
- return md5_crypt_r(pw, salt, data);
-
- for(i=0; i < 66; i++)
- data->block[i] = 0;
- for(i=0; (c= *pw) && i < 64; pw++) {
- for(j=0; j < 7; j++, i++)
- data->block[i] = (c>>(6-j)) & 01;
- i++;
- }
-
- setkey_r(data->block, data);
-
- for(i=0; i < 66; i++)
- data->block[i] = 0;
-
- for(i=0; i < 2; i++) {
- c = *salt++;
- data->iobuf[i] = c;
- if(c > 'Z')
- c -= 6;
- if(c > '9')
- c -= 7;
- c -= '.';
- for(j=0; j < 6; j++) {
- if((c>>j) & 01) {
- int ind1 = (((i<<1)+i)<< 1) + j;
- int ind2 = ind1 + 24;
- data->E[ind1] ^= data->E[ind2];
- data->E[ind2] ^= data->E[ind1];
- data->E[ind1] ^= data->E[ind2];
- }
- }
- }
-
- for(i=0; i < 25; i++)
- encrypt_r(data->block, 0, data);
-
- for(i=0; i < 11; i++) {
- c = 0;
- for(j=0; j < 6; j++) {
- c <<= 1;
- c |= data->block[(((i<<1)+i)<<1)+j];
- }
- c += '.';
- if(c > '9')
- c += 7;
- if(c > 'Z')
- c += 6;
- data->iobuf[i+2] = c;
- }
- data->iobuf[i+2] = 0;
- if(data->iobuf[1] == 0)
- data->iobuf[1] = data->iobuf[0];
- return(data->iobuf);
+ char pwb[66];
+ char *cp;
+ static char result[16];
+ char *p = pwb;
+ struct ordering new_etr;
+ int i;
+
+ /* First, check if we are supposed to be using the MD5 replacement
+ * instead of DES... */
+ if (strncmp (md5_magic, salt, sizeof (md5_magic) - 1) == 0)
+ return md5_crypt_r(pw, salt, data);
+
+ while (*pw && p < &pwb[64]) {
+ int j = 7;
+
+ while (j--) {
+ *p++ = (*pw >> j) & 01;
+ }
+ pw++;
+ *p++ = 0;
+ }
+ while (p < &pwb[64]) *p++ = 0;
+
+ setkey_r(p = pwb, data);
+
+ while (p < &pwb[66]) *p++ = 0;
+
+ new_etr = etr;
+ EP = &new_etr;
+ if (salt[0] == 0 || salt[1] == 0) salt = "**";
+ for (i = 0; i < 2; i++) {
+ char c = *salt++;
+ int j;
+
+ result[i] = c;
+ if ( c > 'Z') c -= 6 + 7 + '.'; /* c was a lower case letter */
+ else if ( c > '9') c -= 7 + '.';/* c was upper case letter */
+ else c -= '.'; /* c was digit, '.' or '/'. */
+ /* now, 0 <= c <= 63 */
+ for (j = 0; j < 6; j++) {
+ if ((c >> j) & 01) {
+ int t = 6*i + j;
+ int temp = new_etr.o_data[t];
+ new_etr.o_data[t] = new_etr.o_data[t+24];
+ new_etr.o_data[t+24] = temp;
+ }
+ }
+ }
+
+ if (result[1] == 0) result[1] = result[0];
+
+ for (i = 0; i < 25; i++) encrypt(pwb,0);
+ EP = &etr;
+
+ p = pwb;
+ cp = result+2;
+ while (p < &pwb[66]) {
+ int c = 0;
+ int j = 6;
+
+ while (j--) {
+ c <<= 1;
+ c |= *p++;
+ }
+ c += '.'; /* becomes >= '.' */
+ if (c > '9') c += 7; /* not in [./0-9], becomes upper */
+ if (c > 'Z') c += 6; /* not in [A-Z], becomes lower */
+ *cp++ = c;
+ }
+ *cp = 0;
+ return result;
}
+
+/*
+ * Copyright (c) 1987,1997, Prentice Hall
+ * All rights reserved.
+ *
+ * Redistribution and use of the MINIX operating system in source and
+ * binary forms, with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 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.
+ *
+ * Neither the name of Prentice Hall nor the names of the software
+ * authors or contributors may be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, 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 PRENTICE HALL OR ANY AUTHORS 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.
+ *
+ */
+
+
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