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4ace4afb |
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 | |