| 1 | /*
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| 2 | * UFC-crypt: ultra fast crypt(3) implementation
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| 3 | *
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| 4 | * Copyright (C) 1991, Michael Glad, email: [email protected]
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Library General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Library General Public License for more details.
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| 15 |
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| 16 | * You should have received a copy of the GNU Library General Public
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| 17 | * License along with this library; if not, write to the Free
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| 18 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 19 | *
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| 20 | * @(#)crypt.c 2.2 10/04/91
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| 21 | *
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| 22 | * Semiportable C version
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| 23 | *
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| 24 | */
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| 25 |
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| 26 | #include "crypt_util.h"
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| 27 |
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| 28 | extern unsigned long sb0[], sb1[], sb2[], sb3[];
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| 29 | extern unsigned long keytab[16][2];
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| 30 |
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| 31 | #define SBA(sb, v) (*(unsigned long*)((char*)(sb)+(v)))
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| 32 |
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| 33 | #define F(I, O1, O2, SBX, SBY) \
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| 34 | s = *k++ ^ I; \
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| 35 | O1 ^= SBA(SBX, (s & 0xffff)); O2 ^= SBA(SBX, ((s & 0xffff) + 4)); \
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| 36 | O1 ^= SBA(SBY, (s >>= 16)); O2 ^= SBA(SBY, ((s) + 4));
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| 37 |
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| 38 | #define G(I1, I2, O1, O2) \
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| 39 | F(I1, O1, O2, sb1, sb0) F(I2, O1, O2, sb3, sb2)
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| 40 |
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| 41 | #define H G(r1, r2, l1, l2) ; G(l1, l2, r1, r2)
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| 42 |
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| 43 | char *crypt(key, salt)
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| 44 | char *key;
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| 45 | char *salt;
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| 46 | { unsigned long l1, l2, r1, r2, i, j, s, *k;
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| 47 |
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| 48 | setup_salt(salt);
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| 49 | mk_keytab(key);
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| 50 |
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| 51 | l1=l2=r1=r2=0;
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| 52 |
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| 53 | for(j=0; j<25; j++) {
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| 54 | k = &keytab[0][0];
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| 55 | for(i=8; i--; ) {
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| 56 | H;
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| 57 | }
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| 58 | s=l1; l1=r1; r1=s; s=l2; l2=r2; r2=s;
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| 59 | }
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| 60 |
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| 61 | return output_conversion(l1, l2, r1, r2, salt);
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| 62 | }
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| 63 |
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