| 1 | /* fcrypt.c */
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| 2 | /* Copyright (C) 1993 Eric Young - see README for more details */
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| 3 | #include <stdio.h>
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| 4 |
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| 5 | /* Eric Young.
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| 6 | * This version of crypt has been developed from my MIT compatable
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| 7 | * DES library.
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| 8 | * The library is available at pub/DES at ftp.psy.uq.oz.au
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| 9 | * [email protected]
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| 10 | */
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| 11 |
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| 12 | typedef unsigned char des_cblock[8];
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| 13 |
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| 14 | typedef struct des_ks_struct
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| 15 | {
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| 16 | union {
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| 17 | des_cblock _;
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| 18 | /* make sure things are correct size on machines with
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| 19 | * 8 byte longs */
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| 20 | unsigned long pad[2];
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| 21 | } ks;
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| 22 | #define _ ks._
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| 23 | } des_key_schedule[16];
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| 24 |
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| 25 | #define DES_KEY_SZ (sizeof(des_cblock))
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| 26 | #define DES_ENCRYPT 1
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| 27 | #define DES_DECRYPT 0
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| 28 |
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| 29 | #define ITERATIONS 16
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| 30 | #define HALF_ITERATIONS 8
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| 31 |
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| 32 | #define c2l(c,l) (l =((unsigned long)(*((c)++))) , \
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| 33 | l|=((unsigned long)(*((c)++)))<< 8, \
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| 34 | l|=((unsigned long)(*((c)++)))<<16, \
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| 35 | l|=((unsigned long)(*((c)++)))<<24)
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| 36 |
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| 37 | #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
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| 38 | *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
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| 39 | *((c)++)=(unsigned char)(((l)>>16)&0xff), \
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| 40 | *((c)++)=(unsigned char)(((l)>>24)&0xff))
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| 41 |
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| 42 | static unsigned long SPtrans[8][64]={
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| 43 | { /* nibble 0 */
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| 44 | 0x00820200, 0x00020000, 0x80800000, 0x80820200,
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| 45 | 0x00800000, 0x80020200, 0x80020000, 0x80800000,
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| 46 | 0x80020200, 0x00820200, 0x00820000, 0x80000200,
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| 47 | 0x80800200, 0x00800000, 0x00000000, 0x80020000,
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| 48 | 0x00020000, 0x80000000, 0x00800200, 0x00020200,
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| 49 | 0x80820200, 0x00820000, 0x80000200, 0x00800200,
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| 50 | 0x80000000, 0x00000200, 0x00020200, 0x80820000,
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| 51 | 0x00000200, 0x80800200, 0x80820000, 0x00000000,
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| 52 | 0x00000000, 0x80820200, 0x00800200, 0x80020000,
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| 53 | 0x00820200, 0x00020000, 0x80000200, 0x00800200,
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| 54 | 0x80820000, 0x00000200, 0x00020200, 0x80800000,
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| 55 | 0x80020200, 0x80000000, 0x80800000, 0x00820000,
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| 56 | 0x80820200, 0x00020200, 0x00820000, 0x80800200,
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| 57 | 0x00800000, 0x80000200, 0x80020000, 0x00000000,
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| 58 | 0x00020000, 0x00800000, 0x80800200, 0x00820200,
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| 59 | 0x80000000, 0x80820000, 0x00000200, 0x80020200},
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| 60 | { /* nibble 1 */
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| 61 | 0x10042004, 0x00000000, 0x00042000, 0x10040000,
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| 62 | 0x10000004, 0x00002004, 0x10002000, 0x00042000,
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| 63 | 0x00002000, 0x10040004, 0x00000004, 0x10002000,
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| 64 | 0x00040004, 0x10042000, 0x10040000, 0x00000004,
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| 65 | 0x00040000, 0x10002004, 0x10040004, 0x00002000,
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| 66 | 0x00042004, 0x10000000, 0x00000000, 0x00040004,
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| 67 | 0x10002004, 0x00042004, 0x10042000, 0x10000004,
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| 68 | 0x10000000, 0x00040000, 0x00002004, 0x10042004,
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| 69 | 0x00040004, 0x10042000, 0x10002000, 0x00042004,
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| 70 | 0x10042004, 0x00040004, 0x10000004, 0x00000000,
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| 71 | 0x10000000, 0x00002004, 0x00040000, 0x10040004,
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| 72 | 0x00002000, 0x10000000, 0x00042004, 0x10002004,
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| 73 | 0x10042000, 0x00002000, 0x00000000, 0x10000004,
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| 74 | 0x00000004, 0x10042004, 0x00042000, 0x10040000,
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| 75 | 0x10040004, 0x00040000, 0x00002004, 0x10002000,
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| 76 | 0x10002004, 0x00000004, 0x10040000, 0x00042000},
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| 77 | { /* nibble 2 */
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| 78 | 0x41000000, 0x01010040, 0x00000040, 0x41000040,
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| 79 | 0x40010000, 0x01000000, 0x41000040, 0x00010040,
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| 80 | 0x01000040, 0x00010000, 0x01010000, 0x40000000,
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| 81 | 0x41010040, 0x40000040, 0x40000000, 0x41010000,
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| 82 | 0x00000000, 0x40010000, 0x01010040, 0x00000040,
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| 83 | 0x40000040, 0x41010040, 0x00010000, 0x41000000,
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| 84 | 0x41010000, 0x01000040, 0x40010040, 0x01010000,
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| 85 | 0x00010040, 0x00000000, 0x01000000, 0x40010040,
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| 86 | 0x01010040, 0x00000040, 0x40000000, 0x00010000,
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| 87 | 0x40000040, 0x40010000, 0x01010000, 0x41000040,
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| 88 | 0x00000000, 0x01010040, 0x00010040, 0x41010000,
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| 89 | 0x40010000, 0x01000000, 0x41010040, 0x40000000,
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| 90 | 0x40010040, 0x41000000, 0x01000000, 0x41010040,
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| 91 | 0x00010000, 0x01000040, 0x41000040, 0x00010040,
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| 92 | 0x01000040, 0x00000000, 0x41010000, 0x40000040,
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| 93 | 0x41000000, 0x40010040, 0x00000040, 0x01010000},
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| 94 | { /* nibble 3 */
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| 95 | 0x00100402, 0x04000400, 0x00000002, 0x04100402,
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| 96 | 0x00000000, 0x04100000, 0x04000402, 0x00100002,
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| 97 | 0x04100400, 0x04000002, 0x04000000, 0x00000402,
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| 98 | 0x04000002, 0x00100402, 0x00100000, 0x04000000,
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| 99 | 0x04100002, 0x00100400, 0x00000400, 0x00000002,
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| 100 | 0x00100400, 0x04000402, 0x04100000, 0x00000400,
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| 101 | 0x00000402, 0x00000000, 0x00100002, 0x04100400,
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| 102 | 0x04000400, 0x04100002, 0x04100402, 0x00100000,
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| 103 | 0x04100002, 0x00000402, 0x00100000, 0x04000002,
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| 104 | 0x00100400, 0x04000400, 0x00000002, 0x04100000,
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| 105 | 0x04000402, 0x00000000, 0x00000400, 0x00100002,
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| 106 | 0x00000000, 0x04100002, 0x04100400, 0x00000400,
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| 107 | 0x04000000, 0x04100402, 0x00100402, 0x00100000,
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| 108 | 0x04100402, 0x00000002, 0x04000400, 0x00100402,
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| 109 | 0x00100002, 0x00100400, 0x04100000, 0x04000402,
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| 110 | 0x00000402, 0x04000000, 0x04000002, 0x04100400},
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| 111 | { /* nibble 4 */
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| 112 | 0x02000000, 0x00004000, 0x00000100, 0x02004108,
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| 113 | 0x02004008, 0x02000100, 0x00004108, 0x02004000,
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| 114 | 0x00004000, 0x00000008, 0x02000008, 0x00004100,
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| 115 | 0x02000108, 0x02004008, 0x02004100, 0x00000000,
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| 116 | 0x00004100, 0x02000000, 0x00004008, 0x00000108,
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| 117 | 0x02000100, 0x00004108, 0x00000000, 0x02000008,
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| 118 | 0x00000008, 0x02000108, 0x02004108, 0x00004008,
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| 119 | 0x02004000, 0x00000100, 0x00000108, 0x02004100,
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| 120 | 0x02004100, 0x02000108, 0x00004008, 0x02004000,
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| 121 | 0x00004000, 0x00000008, 0x02000008, 0x02000100,
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| 122 | 0x02000000, 0x00004100, 0x02004108, 0x00000000,
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| 123 | 0x00004108, 0x02000000, 0x00000100, 0x00004008,
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| 124 | 0x02000108, 0x00000100, 0x00000000, 0x02004108,
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| 125 | 0x02004008, 0x02004100, 0x00000108, 0x00004000,
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| 126 | 0x00004100, 0x02004008, 0x02000100, 0x00000108,
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| 127 | 0x00000008, 0x00004108, 0x02004000, 0x02000008},
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| 128 | { /* nibble 5 */
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| 129 | 0x20000010, 0x00080010, 0x00000000, 0x20080800,
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| 130 | 0x00080010, 0x00000800, 0x20000810, 0x00080000,
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| 131 | 0x00000810, 0x20080810, 0x00080800, 0x20000000,
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| 132 | 0x20000800, 0x20000010, 0x20080000, 0x00080810,
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| 133 | 0x00080000, 0x20000810, 0x20080010, 0x00000000,
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| 134 | 0x00000800, 0x00000010, 0x20080800, 0x20080010,
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| 135 | 0x20080810, 0x20080000, 0x20000000, 0x00000810,
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| 136 | 0x00000010, 0x00080800, 0x00080810, 0x20000800,
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| 137 | 0x00000810, 0x20000000, 0x20000800, 0x00080810,
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| 138 | 0x20080800, 0x00080010, 0x00000000, 0x20000800,
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| 139 | 0x20000000, 0x00000800, 0x20080010, 0x00080000,
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| 140 | 0x00080010, 0x20080810, 0x00080800, 0x00000010,
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| 141 | 0x20080810, 0x00080800, 0x00080000, 0x20000810,
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| 142 | 0x20000010, 0x20080000, 0x00080810, 0x00000000,
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| 143 | 0x00000800, 0x20000010, 0x20000810, 0x20080800,
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| 144 | 0x20080000, 0x00000810, 0x00000010, 0x20080010},
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| 145 | { /* nibble 6 */
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| 146 | 0x00001000, 0x00000080, 0x00400080, 0x00400001,
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| 147 | 0x00401081, 0x00001001, 0x00001080, 0x00000000,
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| 148 | 0x00400000, 0x00400081, 0x00000081, 0x00401000,
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| 149 | 0x00000001, 0x00401080, 0x00401000, 0x00000081,
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| 150 | 0x00400081, 0x00001000, 0x00001001, 0x00401081,
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| 151 | 0x00000000, 0x00400080, 0x00400001, 0x00001080,
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| 152 | 0x00401001, 0x00001081, 0x00401080, 0x00000001,
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| 153 | 0x00001081, 0x00401001, 0x00000080, 0x00400000,
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| 154 | 0x00001081, 0x00401000, 0x00401001, 0x00000081,
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| 155 | 0x00001000, 0x00000080, 0x00400000, 0x00401001,
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| 156 | 0x00400081, 0x00001081, 0x00001080, 0x00000000,
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| 157 | 0x00000080, 0x00400001, 0x00000001, 0x00400080,
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| 158 | 0x00000000, 0x00400081, 0x00400080, 0x00001080,
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| 159 | 0x00000081, 0x00001000, 0x00401081, 0x00400000,
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| 160 | 0x00401080, 0x00000001, 0x00001001, 0x00401081,
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| 161 | 0x00400001, 0x00401080, 0x00401000, 0x00001001},
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| 162 | { /* nibble 7 */
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| 163 | 0x08200020, 0x08208000, 0x00008020, 0x00000000,
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| 164 | 0x08008000, 0x00200020, 0x08200000, 0x08208020,
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| 165 | 0x00000020, 0x08000000, 0x00208000, 0x00008020,
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| 166 | 0x00208020, 0x08008020, 0x08000020, 0x08200000,
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| 167 | 0x00008000, 0x00208020, 0x00200020, 0x08008000,
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| 168 | 0x08208020, 0x08000020, 0x00000000, 0x00208000,
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| 169 | 0x08000000, 0x00200000, 0x08008020, 0x08200020,
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| 170 | 0x00200000, 0x00008000, 0x08208000, 0x00000020,
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| 171 | 0x00200000, 0x00008000, 0x08000020, 0x08208020,
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| 172 | 0x00008020, 0x08000000, 0x00000000, 0x00208000,
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| 173 | 0x08200020, 0x08008020, 0x08008000, 0x00200020,
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| 174 | 0x08208000, 0x00000020, 0x00200020, 0x08008000,
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| 175 | 0x08208020, 0x00200000, 0x08200000, 0x08000020,
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| 176 | 0x00208000, 0x00008020, 0x08008020, 0x08200000,
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| 177 | 0x00000020, 0x08208000, 0x00208020, 0x00000000,
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| 178 | 0x08000000, 0x08200020, 0x00008000, 0x00208020}
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| 179 | };
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| 180 | static unsigned long skb[8][64]={
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| 181 | { /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
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| 182 | 0x00000000,0x00000010,0x20000000,0x20000010,
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| 183 | 0x00010000,0x00010010,0x20010000,0x20010010,
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| 184 | 0x00000800,0x00000810,0x20000800,0x20000810,
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| 185 | 0x00010800,0x00010810,0x20010800,0x20010810,
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| 186 | 0x00000020,0x00000030,0x20000020,0x20000030,
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| 187 | 0x00010020,0x00010030,0x20010020,0x20010030,
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| 188 | 0x00000820,0x00000830,0x20000820,0x20000830,
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| 189 | 0x00010820,0x00010830,0x20010820,0x20010830,
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| 190 | 0x00080000,0x00080010,0x20080000,0x20080010,
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| 191 | 0x00090000,0x00090010,0x20090000,0x20090010,
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| 192 | 0x00080800,0x00080810,0x20080800,0x20080810,
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| 193 | 0x00090800,0x00090810,0x20090800,0x20090810,
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| 194 | 0x00080020,0x00080030,0x20080020,0x20080030,
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| 195 | 0x00090020,0x00090030,0x20090020,0x20090030,
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| 196 | 0x00080820,0x00080830,0x20080820,0x20080830,
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| 197 | 0x00090820,0x00090830,0x20090820,0x20090830},
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| 198 | { /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
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| 199 | 0x00000000,0x02000000,0x00002000,0x02002000,
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| 200 | 0x00200000,0x02200000,0x00202000,0x02202000,
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| 201 | 0x00000004,0x02000004,0x00002004,0x02002004,
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| 202 | 0x00200004,0x02200004,0x00202004,0x02202004,
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| 203 | 0x00000400,0x02000400,0x00002400,0x02002400,
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| 204 | 0x00200400,0x02200400,0x00202400,0x02202400,
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| 205 | 0x00000404,0x02000404,0x00002404,0x02002404,
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| 206 | 0x00200404,0x02200404,0x00202404,0x02202404,
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| 207 | 0x10000000,0x12000000,0x10002000,0x12002000,
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| 208 | 0x10200000,0x12200000,0x10202000,0x12202000,
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| 209 | 0x10000004,0x12000004,0x10002004,0x12002004,
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| 210 | 0x10200004,0x12200004,0x10202004,0x12202004,
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| 211 | 0x10000400,0x12000400,0x10002400,0x12002400,
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| 212 | 0x10200400,0x12200400,0x10202400,0x12202400,
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| 213 | 0x10000404,0x12000404,0x10002404,0x12002404,
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| 214 | 0x10200404,0x12200404,0x10202404,0x12202404},
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| 215 | { /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
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| 216 | 0x00000000,0x00000001,0x00040000,0x00040001,
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| 217 | 0x01000000,0x01000001,0x01040000,0x01040001,
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| 218 | 0x00000002,0x00000003,0x00040002,0x00040003,
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| 219 | 0x01000002,0x01000003,0x01040002,0x01040003,
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| 220 | 0x00000200,0x00000201,0x00040200,0x00040201,
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| 221 | 0x01000200,0x01000201,0x01040200,0x01040201,
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| 222 | 0x00000202,0x00000203,0x00040202,0x00040203,
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| 223 | 0x01000202,0x01000203,0x01040202,0x01040203,
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| 224 | 0x08000000,0x08000001,0x08040000,0x08040001,
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| 225 | 0x09000000,0x09000001,0x09040000,0x09040001,
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| 226 | 0x08000002,0x08000003,0x08040002,0x08040003,
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| 227 | 0x09000002,0x09000003,0x09040002,0x09040003,
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| 228 | 0x08000200,0x08000201,0x08040200,0x08040201,
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| 229 | 0x09000200,0x09000201,0x09040200,0x09040201,
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| 230 | 0x08000202,0x08000203,0x08040202,0x08040203,
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| 231 | 0x09000202,0x09000203,0x09040202,0x09040203},
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| 232 | { /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
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| 233 | 0x00000000,0x00100000,0x00000100,0x00100100,
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| 234 | 0x00000008,0x00100008,0x00000108,0x00100108,
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| 235 | 0x00001000,0x00101000,0x00001100,0x00101100,
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| 236 | 0x00001008,0x00101008,0x00001108,0x00101108,
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| 237 | 0x04000000,0x04100000,0x04000100,0x04100100,
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| 238 | 0x04000008,0x04100008,0x04000108,0x04100108,
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| 239 | 0x04001000,0x04101000,0x04001100,0x04101100,
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| 240 | 0x04001008,0x04101008,0x04001108,0x04101108,
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| 241 | 0x00020000,0x00120000,0x00020100,0x00120100,
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| 242 | 0x00020008,0x00120008,0x00020108,0x00120108,
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| 243 | 0x00021000,0x00121000,0x00021100,0x00121100,
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| 244 | 0x00021008,0x00121008,0x00021108,0x00121108,
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| 245 | 0x04020000,0x04120000,0x04020100,0x04120100,
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| 246 | 0x04020008,0x04120008,0x04020108,0x04120108,
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| 247 | 0x04021000,0x04121000,0x04021100,0x04121100,
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| 248 | 0x04021008,0x04121008,0x04021108,0x04121108},
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| 249 | { /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
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| 250 | 0x00000000,0x10000000,0x00010000,0x10010000,
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| 251 | 0x00000004,0x10000004,0x00010004,0x10010004,
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| 252 | 0x20000000,0x30000000,0x20010000,0x30010000,
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| 253 | 0x20000004,0x30000004,0x20010004,0x30010004,
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| 254 | 0x00100000,0x10100000,0x00110000,0x10110000,
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| 255 | 0x00100004,0x10100004,0x00110004,0x10110004,
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| 256 | 0x20100000,0x30100000,0x20110000,0x30110000,
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| 257 | 0x20100004,0x30100004,0x20110004,0x30110004,
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| 258 | 0x00001000,0x10001000,0x00011000,0x10011000,
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| 259 | 0x00001004,0x10001004,0x00011004,0x10011004,
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| 260 | 0x20001000,0x30001000,0x20011000,0x30011000,
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| 261 | 0x20001004,0x30001004,0x20011004,0x30011004,
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| 262 | 0x00101000,0x10101000,0x00111000,0x10111000,
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| 263 | 0x00101004,0x10101004,0x00111004,0x10111004,
|
|---|
| 264 | 0x20101000,0x30101000,0x20111000,0x30111000,
|
|---|
| 265 | 0x20101004,0x30101004,0x20111004,0x30111004},
|
|---|
| 266 | { /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
|
|---|
| 267 | 0x00000000,0x08000000,0x00000008,0x08000008,
|
|---|
| 268 | 0x00000400,0x08000400,0x00000408,0x08000408,
|
|---|
| 269 | 0x00020000,0x08020000,0x00020008,0x08020008,
|
|---|
| 270 | 0x00020400,0x08020400,0x00020408,0x08020408,
|
|---|
| 271 | 0x00000001,0x08000001,0x00000009,0x08000009,
|
|---|
| 272 | 0x00000401,0x08000401,0x00000409,0x08000409,
|
|---|
| 273 | 0x00020001,0x08020001,0x00020009,0x08020009,
|
|---|
| 274 | 0x00020401,0x08020401,0x00020409,0x08020409,
|
|---|
| 275 | 0x02000000,0x0A000000,0x02000008,0x0A000008,
|
|---|
| 276 | 0x02000400,0x0A000400,0x02000408,0x0A000408,
|
|---|
| 277 | 0x02020000,0x0A020000,0x02020008,0x0A020008,
|
|---|
| 278 | 0x02020400,0x0A020400,0x02020408,0x0A020408,
|
|---|
| 279 | 0x02000001,0x0A000001,0x02000009,0x0A000009,
|
|---|
| 280 | 0x02000401,0x0A000401,0x02000409,0x0A000409,
|
|---|
| 281 | 0x02020001,0x0A020001,0x02020009,0x0A020009,
|
|---|
| 282 | 0x02020401,0x0A020401,0x02020409,0x0A020409},
|
|---|
| 283 | { /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
|
|---|
| 284 | 0x00000000,0x00000100,0x00080000,0x00080100,
|
|---|
| 285 | 0x01000000,0x01000100,0x01080000,0x01080100,
|
|---|
| 286 | 0x00000010,0x00000110,0x00080010,0x00080110,
|
|---|
| 287 | 0x01000010,0x01000110,0x01080010,0x01080110,
|
|---|
| 288 | 0x00200000,0x00200100,0x00280000,0x00280100,
|
|---|
| 289 | 0x01200000,0x01200100,0x01280000,0x01280100,
|
|---|
| 290 | 0x00200010,0x00200110,0x00280010,0x00280110,
|
|---|
| 291 | 0x01200010,0x01200110,0x01280010,0x01280110,
|
|---|
| 292 | 0x00000200,0x00000300,0x00080200,0x00080300,
|
|---|
| 293 | 0x01000200,0x01000300,0x01080200,0x01080300,
|
|---|
| 294 | 0x00000210,0x00000310,0x00080210,0x00080310,
|
|---|
| 295 | 0x01000210,0x01000310,0x01080210,0x01080310,
|
|---|
| 296 | 0x00200200,0x00200300,0x00280200,0x00280300,
|
|---|
| 297 | 0x01200200,0x01200300,0x01280200,0x01280300,
|
|---|
| 298 | 0x00200210,0x00200310,0x00280210,0x00280310,
|
|---|
| 299 | 0x01200210,0x01200310,0x01280210,0x01280310},
|
|---|
| 300 | { /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
|
|---|
| 301 | 0x00000000,0x04000000,0x00040000,0x04040000,
|
|---|
| 302 | 0x00000002,0x04000002,0x00040002,0x04040002,
|
|---|
| 303 | 0x00002000,0x04002000,0x00042000,0x04042000,
|
|---|
| 304 | 0x00002002,0x04002002,0x00042002,0x04042002,
|
|---|
| 305 | 0x00000020,0x04000020,0x00040020,0x04040020,
|
|---|
| 306 | 0x00000022,0x04000022,0x00040022,0x04040022,
|
|---|
| 307 | 0x00002020,0x04002020,0x00042020,0x04042020,
|
|---|
| 308 | 0x00002022,0x04002022,0x00042022,0x04042022,
|
|---|
| 309 | 0x00000800,0x04000800,0x00040800,0x04040800,
|
|---|
| 310 | 0x00000802,0x04000802,0x00040802,0x04040802,
|
|---|
| 311 | 0x00002800,0x04002800,0x00042800,0x04042800,
|
|---|
| 312 | 0x00002802,0x04002802,0x00042802,0x04042802,
|
|---|
| 313 | 0x00000820,0x04000820,0x00040820,0x04040820,
|
|---|
| 314 | 0x00000822,0x04000822,0x00040822,0x04040822,
|
|---|
| 315 | 0x00002820,0x04002820,0x00042820,0x04042820,
|
|---|
| 316 | 0x00002822,0x04002822,0x00042822,0x04042822}
|
|---|
| 317 | };
|
|---|
| 318 |
|
|---|
| 319 | /* See ecb_encrypt.c for a pseudo description of these macros. */
|
|---|
| 320 | #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
|
|---|
| 321 | (b)^=(t),\
|
|---|
| 322 | (a)^=((t)<<(n)))
|
|---|
| 323 |
|
|---|
| 324 | #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
|
|---|
| 325 | (a)=(a)^(t)^(t>>(16-(n))))\
|
|---|
| 326 |
|
|---|
| 327 | static char shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0};
|
|---|
| 328 |
|
|---|
| 329 | static int body(
|
|---|
| 330 | unsigned long *out0,
|
|---|
| 331 | unsigned long *out1,
|
|---|
| 332 | des_key_schedule ks,
|
|---|
| 333 | unsigned long Eswap0,
|
|---|
| 334 | unsigned long Eswap1);
|
|---|
| 335 |
|
|---|
| 336 | static int
|
|---|
| 337 | des_set_key(des_cblock *key, des_key_schedule schedule)
|
|---|
| 338 | {
|
|---|
| 339 | register unsigned long c,d,t,s;
|
|---|
| 340 | register unsigned char *in;
|
|---|
| 341 | register unsigned long *k;
|
|---|
| 342 | register int i;
|
|---|
| 343 |
|
|---|
| 344 | k=(unsigned long *)schedule;
|
|---|
| 345 | in=(unsigned char *)key;
|
|---|
| 346 |
|
|---|
| 347 | c2l(in,c);
|
|---|
| 348 | c2l(in,d);
|
|---|
| 349 |
|
|---|
| 350 | /* I now do it in 47 simple operations :-)
|
|---|
| 351 | * Thanks to John Fletcher ([email protected])
|
|---|
| 352 | * for the inspiration. :-) */
|
|---|
| 353 | PERM_OP (d,c,t,4,0x0f0f0f0f);
|
|---|
| 354 | HPERM_OP(c,t,-2,0xcccc0000);
|
|---|
| 355 | HPERM_OP(d,t,-2,0xcccc0000);
|
|---|
| 356 | PERM_OP (d,c,t,1,0x55555555);
|
|---|
| 357 | PERM_OP (c,d,t,8,0x00ff00ff);
|
|---|
| 358 | PERM_OP (d,c,t,1,0x55555555);
|
|---|
| 359 | d= (((d&0x000000ff)<<16)| (d&0x0000ff00) |
|
|---|
| 360 | ((d&0x00ff0000)>>16)|((c&0xf0000000)>>4));
|
|---|
| 361 | c&=0x0fffffff;
|
|---|
| 362 |
|
|---|
| 363 | for (i=0; i<ITERATIONS; i++)
|
|---|
| 364 | {
|
|---|
| 365 | if (shifts2[i])
|
|---|
| 366 | { c=((c>>2)|(c<<26)); d=((d>>2)|(d<<26)); }
|
|---|
| 367 | else
|
|---|
| 368 | { c=((c>>1)|(c<<27)); d=((d>>1)|(d<<27)); }
|
|---|
| 369 | c&=0x0fffffff;
|
|---|
| 370 | d&=0x0fffffff;
|
|---|
| 371 | /* could be a few less shifts but I am to lazy at this
|
|---|
| 372 | * point in time to investigate */
|
|---|
| 373 | s= skb[0][ (c )&0x3f ]|
|
|---|
| 374 | skb[1][((c>> 6)&0x03)|((c>> 7)&0x3c)]|
|
|---|
| 375 | skb[2][((c>>13)&0x0f)|((c>>14)&0x30)]|
|
|---|
| 376 | skb[3][((c>>20)&0x01)|((c>>21)&0x06) |
|
|---|
| 377 | ((c>>22)&0x38)];
|
|---|
| 378 | t= skb[4][ (d )&0x3f ]|
|
|---|
| 379 | skb[5][((d>> 7)&0x03)|((d>> 8)&0x3c)]|
|
|---|
| 380 | skb[6][ (d>>15)&0x3f ]|
|
|---|
| 381 | skb[7][((d>>21)&0x0f)|((d>>22)&0x30)];
|
|---|
| 382 |
|
|---|
| 383 | /* table contained 0213 4657 */
|
|---|
| 384 | *(k++)=((t<<16)|(s&0x0000ffff))&0xffffffff;
|
|---|
| 385 | s= ((s>>16)|(t&0xffff0000));
|
|---|
| 386 |
|
|---|
| 387 | s=(s<<4)|(s>>28);
|
|---|
| 388 | *(k++)=s&0xffffffff;
|
|---|
| 389 | }
|
|---|
| 390 | return(0);
|
|---|
| 391 | }
|
|---|
| 392 |
|
|---|
| 393 | /******************************************************************
|
|---|
| 394 | * modified stuff for crypt.
|
|---|
| 395 | ******************************************************************/
|
|---|
| 396 |
|
|---|
| 397 | /* The changes to this macro may help or hinder, depending on the
|
|---|
| 398 | * compiler and the achitecture. gcc2 always seems to do well :-).
|
|---|
| 399 | * Inspired by Dana How <[email protected]>
|
|---|
| 400 | * DO NOT use the alternative version on machines with 8 byte longs.
|
|---|
| 401 | */
|
|---|
| 402 | #ifdef ALT_ECB
|
|---|
| 403 | #define D_ENCRYPT(L,R,S) \
|
|---|
| 404 | v=(R^(R>>16)); \
|
|---|
| 405 | u=(v&E0); \
|
|---|
| 406 | v=(v&E1); \
|
|---|
| 407 | u=((u^(u<<16))^R^s[S ])<<2; \
|
|---|
| 408 | t=(v^(v<<16))^R^s[S+1]; \
|
|---|
| 409 | t=(t>>2)|(t<<30); \
|
|---|
| 410 | L^= \
|
|---|
| 411 | *(unsigned long *)(des_SP+0x0100+((t )&0xfc))+ \
|
|---|
| 412 | *(unsigned long *)(des_SP+0x0300+((t>> 8)&0xfc))+ \
|
|---|
| 413 | *(unsigned long *)(des_SP+0x0500+((t>>16)&0xfc))+ \
|
|---|
| 414 | *(unsigned long *)(des_SP+0x0700+((t>>24)&0xfc))+ \
|
|---|
| 415 | *(unsigned long *)(des_SP+ ((u )&0xfc))+ \
|
|---|
| 416 | *(unsigned long *)(des_SP+0x0200+((u>> 8)&0xfc))+ \
|
|---|
| 417 | *(unsigned long *)(des_SP+0x0400+((u>>16)&0xfc))+ \
|
|---|
| 418 | *(unsigned long *)(des_SP+0x0600+((u>>24)&0xfc));
|
|---|
| 419 | #else /* original version */
|
|---|
| 420 | #define D_ENCRYPT(L,R,S) \
|
|---|
| 421 | v=(R^(R>>16)); \
|
|---|
| 422 | u=(v&E0); \
|
|---|
| 423 | v=(v&E1); \
|
|---|
| 424 | u=(u^(u<<16))^R^s[S ]; \
|
|---|
| 425 | t=(v^(v<<16))^R^s[S+1]; \
|
|---|
| 426 | t=(t>>4)|(t<<28); \
|
|---|
| 427 | L^= SPtrans[1][(t )&0x3f]| \
|
|---|
| 428 | SPtrans[3][(t>> 8)&0x3f]| \
|
|---|
| 429 | SPtrans[5][(t>>16)&0x3f]| \
|
|---|
| 430 | SPtrans[7][(t>>24)&0x3f]| \
|
|---|
| 431 | SPtrans[0][(u )&0x3f]| \
|
|---|
| 432 | SPtrans[2][(u>> 8)&0x3f]| \
|
|---|
| 433 | SPtrans[4][(u>>16)&0x3f]| \
|
|---|
| 434 | SPtrans[6][(u>>24)&0x3f];
|
|---|
| 435 | #endif
|
|---|
| 436 |
|
|---|
| 437 | unsigned char con_salt[128]={
|
|---|
| 438 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
|---|
| 439 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
|---|
| 440 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
|---|
| 441 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
|---|
| 442 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
|
|---|
| 443 | 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,
|
|---|
| 444 | 0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
|
|---|
| 445 | 0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
|
|---|
| 446 | 0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
|
|---|
| 447 | 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
|
|---|
| 448 | 0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
|
|---|
| 449 | 0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
|
|---|
| 450 | 0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
|
|---|
| 451 | 0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
|
|---|
| 452 | 0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
|
|---|
| 453 | 0x3D,0x3E,0x3F,0x00,0x00,0x00,0x00,0x00,
|
|---|
| 454 | };
|
|---|
| 455 |
|
|---|
| 456 | unsigned char cov_2char[64]={
|
|---|
| 457 | 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
|
|---|
| 458 | 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
|
|---|
| 459 | 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
|
|---|
| 460 | 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
|
|---|
| 461 | 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
|
|---|
| 462 | 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
|
|---|
| 463 | 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
|
|---|
| 464 | 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
|
|---|
| 465 | };
|
|---|
| 466 |
|
|---|
| 467 | char *
|
|---|
| 468 | des_fcrypt(const char *buf, const char *salt, char *buff)
|
|---|
| 469 | {
|
|---|
| 470 | unsigned int i,j,x,y;
|
|---|
| 471 | unsigned long Eswap0,Eswap1;
|
|---|
| 472 | unsigned long out[2],ll;
|
|---|
| 473 | des_cblock key;
|
|---|
| 474 | des_key_schedule ks;
|
|---|
| 475 | unsigned char bb[9];
|
|---|
| 476 | unsigned char *b=bb;
|
|---|
| 477 | unsigned char c,u;
|
|---|
| 478 |
|
|---|
| 479 | /* eay 25/08/92
|
|---|
| 480 | * If you call crypt("pwd","*") as often happens when you
|
|---|
| 481 | * have * as the pwd field in /etc/passwd, the function
|
|---|
| 482 | * returns *\0XXXXXXXXX
|
|---|
| 483 | * The \0 makes the string look like * so the pwd "*" would
|
|---|
| 484 | * crypt to "*". This was found when replacing the crypt in
|
|---|
| 485 | * our shared libraries. People found that the disbled
|
|---|
| 486 | * accounts effectivly had no passwd :-(. */
|
|---|
| 487 | x=buff[0]=((salt[0] == '\0')?(char)'A':salt[0]);
|
|---|
| 488 | Eswap0=con_salt[x];
|
|---|
| 489 | x=buff[1]=((salt[1] == '\0')?(char)'A':salt[1]);
|
|---|
| 490 | Eswap1=con_salt[x]<<4;
|
|---|
| 491 |
|
|---|
| 492 | for (i=0; i<8; i++)
|
|---|
| 493 | {
|
|---|
| 494 | c= *(buf++);
|
|---|
| 495 | if (!c) break;
|
|---|
| 496 | key[i]=(char)(c<<1);
|
|---|
| 497 | }
|
|---|
| 498 | for (; i<8; i++)
|
|---|
| 499 | key[i]=0;
|
|---|
| 500 |
|
|---|
| 501 | des_set_key((des_cblock *)(key),ks);
|
|---|
| 502 | body(&out[0],&out[1],ks,Eswap0,Eswap1);
|
|---|
| 503 |
|
|---|
| 504 | ll=out[0]; l2c(ll,b);
|
|---|
| 505 | ll=out[1]; l2c(ll,b);
|
|---|
| 506 | y=0;
|
|---|
| 507 | u=0x80;
|
|---|
| 508 | bb[8]=0;
|
|---|
| 509 | for (i=2; i<13; i++)
|
|---|
| 510 | {
|
|---|
| 511 | c=0;
|
|---|
| 512 | for (j=0; j<6; j++)
|
|---|
| 513 | {
|
|---|
| 514 | c<<=1;
|
|---|
| 515 | if (bb[y] & u) c|=1;
|
|---|
| 516 | u>>=1;
|
|---|
| 517 | if (!u)
|
|---|
| 518 | {
|
|---|
| 519 | y++;
|
|---|
| 520 | u=0x80;
|
|---|
| 521 | }
|
|---|
| 522 | }
|
|---|
| 523 | buff[i]=cov_2char[c];
|
|---|
| 524 | }
|
|---|
| 525 | buff[13]='\0';
|
|---|
| 526 | return buff;
|
|---|
| 527 | }
|
|---|
| 528 |
|
|---|
| 529 | static int
|
|---|
| 530 | body( unsigned long *out0,
|
|---|
| 531 | unsigned long *out1,
|
|---|
| 532 | des_key_schedule ks,
|
|---|
| 533 | unsigned long Eswap0,
|
|---|
| 534 | unsigned long Eswap1)
|
|---|
| 535 | {
|
|---|
| 536 | register unsigned long l,r,t,u,v;
|
|---|
| 537 | #ifdef ALT_ECB
|
|---|
| 538 | register unsigned char *des_SP=(unsigned char *)SPtrans;
|
|---|
| 539 | #endif
|
|---|
| 540 | register unsigned long *s;
|
|---|
| 541 | register int i,j;
|
|---|
| 542 | register unsigned long E0,E1;
|
|---|
| 543 |
|
|---|
| 544 | l=0;
|
|---|
| 545 | r=0;
|
|---|
| 546 |
|
|---|
| 547 | s=(unsigned long *)ks;
|
|---|
| 548 | E0=Eswap0;
|
|---|
| 549 | E1=Eswap1;
|
|---|
| 550 |
|
|---|
| 551 | for (j=0; j<25; j++)
|
|---|
| 552 | {
|
|---|
| 553 | for (i=0; i<(ITERATIONS*2); i+=4)
|
|---|
| 554 | {
|
|---|
| 555 | D_ENCRYPT(l,r, i); /* 1 */
|
|---|
| 556 | D_ENCRYPT(r,l, i+2); /* 2 */
|
|---|
| 557 | }
|
|---|
| 558 | t=l;
|
|---|
| 559 | l=r;
|
|---|
| 560 | r=t;
|
|---|
| 561 | }
|
|---|
| 562 | t=r;
|
|---|
| 563 | r=(l>>1)|(l<<31);
|
|---|
| 564 | l=(t>>1)|(t<<31);
|
|---|
| 565 | /* clear the top bits on machines with 8byte longs */
|
|---|
| 566 | l&=0xffffffff;
|
|---|
| 567 | r&=0xffffffff;
|
|---|
| 568 |
|
|---|
| 569 | PERM_OP(r,l,t, 1,0x55555555);
|
|---|
| 570 | PERM_OP(l,r,t, 8,0x00ff00ff);
|
|---|
| 571 | PERM_OP(r,l,t, 2,0x33333333);
|
|---|
| 572 | PERM_OP(l,r,t,16,0x0000ffff);
|
|---|
| 573 | PERM_OP(r,l,t, 4,0x0f0f0f0f);
|
|---|
| 574 |
|
|---|
| 575 | *out0=l;
|
|---|
| 576 | *out1=r;
|
|---|
| 577 | return(0);
|
|---|
| 578 | }
|
|---|
| 579 |
|
|---|
