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