2 * Copyright (c) 1997-1999 The Stanford SRP Authentication Project
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:
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
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.
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.
26 * In addition, the following conditions apply:
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)."
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/)."
38 * 3. Redistributions in source or binary form must retain an intact copy
39 * of this copyright notice and list of conditions.
42 /*#define _POSIX_SOURCE*/
44 #include "t_defines.h"
50 if(c
>= '0' && c
<= '9')
52 else if(c
>= 'a' && c
<= 'f')
54 else if(c
>= 'A' && c
<= 'F')
61 * Convert a hex string to a string of bytes; return size of dst
65 register char *dst
, *src
;
67 register char *chp
= dst
;
68 register unsigned size
= strlen(src
);
70 /* FIXME: handle whitespace and non-hex digits by setting size and src
74 *chp
++ = hexDigitToInt(*src
++);
78 *chp
++ = (hexDigitToInt(*src
) << 4) | hexDigitToInt(*(src
+ 1));
86 * Convert a string of bytes to their hex representation
89 t_tohex(dst
, src
, size
)
90 register char *dst
, *src
;
91 register unsigned size
;
95 register char *chp
= dst
;
97 if(notleading
|| *src
!= '\0') {
99 sprintf(chp
, "%.2x", * (unsigned char *) src
);
103 } while (--size
!= 0);
107 static char b64table
[] =
108 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./";
111 * Convert a base64 string into raw byte array representation.
115 register char *dst
, *src
;
122 while(*src
&& (*src
== ' ' || *src
== '\t' || *src
== '\n'))
126 a
= malloc((size
+ 1) * sizeof(unsigned char));
127 if(a
== (unsigned char *) 0)
132 loc
= strchr(b64table
, src
[i
]);
133 if(loc
== (char *) 0)
136 a
[i
] = loc
- b64table
;
147 a
[j
] |= (a
[i
] & 3) << 6;
149 a
[j
] = (unsigned char) ((a
[i
] & 0x3c) >> 2);
152 a
[j
] |= (a
[i
] & 0xf) << 4;
154 a
[j
] = (unsigned char) ((a
[i
] & 0x30) >> 4);
164 while(a
[j
] == 0 && j
<= size
)
167 memcpy(dst
, a
+ j
, size
- j
+ 1);
173 * Convert a raw byte string into a null-terminated base64 ASCII string.
176 t_tob64(dst
, src
, size
)
177 register char *dst
, *src
;
178 register unsigned size
;
180 int c
, pos
= size
% 3;
181 unsigned char b0
= 0, b1
= 0, b2
= 0, notleading
= 0;
195 c
= (b0
& 0xfc) >> 2;
196 if(notleading
|| c
!= 0) {
197 *dst
++ = b64table
[c
];
200 c
= ((b0
& 3) << 4) | ((b1
& 0xf0) >> 4);
201 if(notleading
|| c
!= 0) {
202 *dst
++ = b64table
[c
];
205 c
= ((b1
& 0xf) << 2) | ((b2
& 0xc0) >> 6);
206 if(notleading
|| c
!= 0) {
207 *dst
++ = b64table
[c
];
211 if(notleading
|| c
!= 0) {
212 *dst
++ = b64table
[c
];
This page took 0.060856 seconds and 5 git commands to generate.