OpenWrt – Blame information for rev 4

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4 office 1 /*
2 * Copyright (c) 1997-1999 The Stanford SRP Authentication Project
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
18 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
19 *
20 * IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
21 * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
22 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
23 * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
24 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 *
26 * In addition, the following conditions apply:
27 *
28 * 1. Any software that incorporates the SRP authentication technology
29 * must display the following acknowlegment:
30 * "This product uses the 'Secure Remote Password' cryptographic
31 * authentication system developed by Tom Wu (tjw@CS.Stanford.EDU)."
32 *
33 * 2. Any software that incorporates all or part of the SRP distribution
34 * itself must also display the following acknowledgment:
35 * "This product includes software developed by Tom Wu and Eugene
36 * Jhong for the SRP Distribution (http://srp.stanford.edu/srp/)."
37 *
38 * 3. Redistributions in source or binary form must retain an intact copy
39 * of this copyright notice and list of conditions.
40 */
41  
42 /*#define _POSIX_SOURCE*/
43 #include <stdio.h>
44 #include "t_defines.h"
45  
46 static int
47 hexDigitToInt(c)
48 char c;
49 {
50 if(c >= '0' && c <= '9')
51 return c - '0';
52 else if(c >= 'a' && c <= 'f')
53 return c - 'a' + 10;
54 else if(c >= 'A' && c <= 'F')
55 return c - 'A' + 10;
56 else
57 return 0;
58 }
59  
60 /*
61 * Convert a hex string to a string of bytes; return size of dst
62 */
63 _TYPE( int )
64 t_fromhex(dst, src)
65 register char *dst, *src;
66 {
67 register char *chp = dst;
68 register unsigned size = strlen(src);
69  
70 /* FIXME: handle whitespace and non-hex digits by setting size and src
71 appropriately. */
72  
73 if(size % 2 == 1) {
74 *chp++ = hexDigitToInt(*src++);
75 --size;
76 }
77 while(size > 0) {
78 *chp++ = (hexDigitToInt(*src) << 4) | hexDigitToInt(*(src + 1));
79 src += 2;
80 size -= 2;
81 }
82 return chp - dst;
83 }
84  
85 /*
86 * Convert a string of bytes to their hex representation
87 */
88 _TYPE( char * )
89 t_tohex(dst, src, size)
90 register char *dst, *src;
91 register unsigned size;
92 {
93 int notleading = 0;
94  
95 register char *chp = dst;
96 if (size != 0) do {
97 if(notleading || *src != '\0') {
98 notleading = 1;
99 sprintf(chp, "%.2x", * (unsigned char *) src);
100 chp += 2;
101 }
102 ++src;
103 } while (--size != 0);
104 return dst;
105 }
106  
107 static char b64table[] =
108 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./";
109  
110 /*
111 * Convert a base64 string into raw byte array representation.
112 */
113 _TYPE( int )
114 t_fromb64(dst, src)
115 register char *dst, *src;
116 {
117 unsigned char *a;
118 char *loc;
119 int i, j;
120 unsigned int size;
121  
122 while(*src && (*src == ' ' || *src == '\t' || *src == '\n'))
123 ++src;
124 size = strlen(src);
125  
126 a = malloc((size + 1) * sizeof(unsigned char));
127 if(a == (unsigned char *) 0)
128 return -1;
129  
130 i = 0;
131 while(i < size) {
132 loc = strchr(b64table, src[i]);
133 if(loc == (char *) 0)
134 break;
135 else
136 a[i] = loc - b64table;
137 ++i;
138 }
139 size = i;
140  
141 i = size - 1;
142 j = size;
143 while(1) {
144 a[j] = a[i];
145 if(--i < 0)
146 break;
147 a[j] |= (a[i] & 3) << 6;
148 --j;
149 a[j] = (unsigned char) ((a[i] & 0x3c) >> 2);
150 if(--i < 0)
151 break;
152 a[j] |= (a[i] & 0xf) << 4;
153 --j;
154 a[j] = (unsigned char) ((a[i] & 0x30) >> 4);
155 if(--i < 0)
156 break;
157 a[j] |= (a[i] << 2);
158  
159 a[--j] = 0;
160 if(--i < 0)
161 break;
162 }
163  
164 while(j <= size && a[j] == 0)
165 ++j;
166  
167 memcpy(dst, a + j, size - j + 1);
168 free(a);
169 return size - j + 1;
170 }
171  
172 /*
173 * Convert a raw byte string into a null-terminated base64 ASCII string.
174 */
175 _TYPE( char * )
176 t_tob64(dst, src, size)
177 register char *dst, *src;
178 register unsigned size;
179 {
180 int c, pos = size % 3;
181 unsigned char b0 = 0, b1 = 0, b2 = 0, notleading = 0;
182 char *olddst = dst;
183  
184 switch(pos) {
185 case 1:
186 b2 = src[0];
187 break;
188 case 2:
189 b1 = src[0];
190 b2 = src[1];
191 break;
192 }
193  
194 while(1) {
195 c = (b0 & 0xfc) >> 2;
196 if(notleading || c != 0) {
197 *dst++ = b64table[c];
198 notleading = 1;
199 }
200 c = ((b0 & 3) << 4) | ((b1 & 0xf0) >> 4);
201 if(notleading || c != 0) {
202 *dst++ = b64table[c];
203 notleading = 1;
204 }
205 c = ((b1 & 0xf) << 2) | ((b2 & 0xc0) >> 6);
206 if(notleading || c != 0) {
207 *dst++ = b64table[c];
208 notleading = 1;
209 }
210 c = b2 & 0x3f;
211 if(notleading || c != 0) {
212 *dst++ = b64table[c];
213 notleading = 1;
214 }
215 if(pos >= size)
216 break;
217 else {
218 b0 = src[pos++];
219 b1 = src[pos++];
220 b2 = src[pos++];
221 }
222 }
223  
224 *dst++ = '\0';
225 return olddst;
226 }