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comparison src/md5/hmac_md5.c @ 367:b27f66555ba8

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Reformated multiline comments to have leading asterisks on each line Now we use: /* ** comment */ This makes the indent style simpler, too.
author markus schnalke <meillo@marmaro.de>
date Thu, 20 Oct 2011 10:20:59 +0200
parents 41958685480d
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366:41958685480d 367:b27f66555ba8
1 /* 1 /*
2 hmac_md5 -- implements RFC 2104 2 ** hmac_md5 -- implements RFC 2104
3 3 **
4 Copyright 2010, markus schnalke <meillo@marmaro.de> 4 ** Copyright 2010, markus schnalke <meillo@marmaro.de>
5 5 **
6 Permission to use, copy, modify, and/or distribute this software for any 6 ** Permission to use, copy, modify, and/or distribute this software for any
7 purpose with or without fee is hereby granted, provided that the above 7 ** purpose with or without fee is hereby granted, provided that the above
8 copyright notice and this permission notice appear in all copies. 8 ** copyright notice and this permission notice appear in all copies.
9 9 **
10 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 ** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 ** WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 ** MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 ** ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 ** WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 ** ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 ** OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 17 **
18 18 **
19 My motivation to write this code was the lack of a nicely licensed 19 ** My motivation to write this code was the lack of a nicely licensed
20 hmac_md5 function in C. I programmed it following the RFC's text. 20 ** hmac_md5 function in C. I programmed it following the RFC's text.
21 Obviously this code is highly similar to the sample code of the RFC. 21 ** Obviously this code is highly similar to the sample code of the RFC.
22 The code is tested against the test vectors of the RFC. Wikipedia's 22 ** The code is tested against the test vectors of the RFC. Wikipedia's
23 HMAC page helped me to understand the algorithm better. 23 ** HMAC page helped me to understand the algorithm better.
24 24 **
25 This hmac_md5 function requires an OpenSSL-compatible MD5 25 ** This hmac_md5 function requires an OpenSSL-compatible MD5
26 implementation. There are Public Domain MD5 implementations by Colin 26 ** implementation. There are Public Domain MD5 implementations by Colin
27 Plumb and by Solar Designer. You probably want to use one of these. 27 ** Plumb and by Solar Designer. You probably want to use one of these.
28 */ 28 */
29 29
30 #include <string.h> 30 #include <string.h>
31 #include "md5.h" 31 #include "md5.h"
32 32
34 const int blocksize = 64; 34 const int blocksize = 64;
35 const int hashsize = 16; 35 const int hashsize = 16;
36 36
37 37
38 /* 38 /*
39 The computed HMAC will be written to `digest'. 39 ** The computed HMAC will be written to `digest'.
40 Ensure digest points to hashsize bytes of allocated memory. 40 ** Ensure digest points to hashsize bytes of allocated memory.
41 */ 41 */
42 void 42 void
43 hmac_md5(unsigned char *text, int textlen, unsigned char *key, int keylen, unsigned char *digest) 43 hmac_md5(unsigned char *text, int textlen, unsigned char *key, int keylen,
44 unsigned char *digest)
44 { 45 {
45 int i; 46 int i;
46 MD5_CTX context; 47 MD5_CTX context;
47 unsigned char ipad[blocksize]; 48 unsigned char ipad[blocksize];
48 unsigned char opad[blocksize]; 49 unsigned char opad[blocksize];