1 /* hash.c: The opiehash() library function.
4 This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
5 The Inner Net License Version 3 applies to this software.
6 You should have received a copy of the license with this software. If
7 you didn't get a copy, you may request one from <license@inner.net>.
11 Modified by cmetz for OPIE 2.4. Use struct opie_otpkey for binary arg.
12 Modified by cmetz for OPIE 2.31. Added SHA support (which may
13 not be correct). Backed out previous optimizations as
14 they killed thread-safety.
15 Created by cmetz for OPIE 2.3 using the old hash.c as a guide.
20 #include <sys/endian.h>
29 VOIDRET opiehash FUNCTION((x, algorithm), struct opie_otpkey *x AND
32 UINT4 *results = (UINT4 *)x;
40 SHA1_Update(&sha, (unsigned char *)x, 8);
41 SHA1_Final((unsigned char *)digest, &sha);
42 results[0] = digest[0] ^ digest[2] ^ digest[4];
43 results[1] = digest[1] ^ digest[3];
46 * RFC2289 mandates that we convert SHA1 digest from big-endian to little
49 results[0] = bswap32(results[0]);
50 results[1] = bswap32(results[1]);
59 MD4Update(&mdx, (unsigned char *)x, 8);
60 MD4Final((unsigned char *)mdx_tmp, &mdx);
61 results[0] = mdx_tmp[0] ^ mdx_tmp[2];
62 results[1] = mdx_tmp[1] ^ mdx_tmp[3];
71 MD5Update(&mdx, (unsigned char *)x, 8);
72 MD5Final((unsigned char *)mdx_tmp, &mdx);
73 results[0] = mdx_tmp[0] ^ mdx_tmp[2];
74 results[1] = mdx_tmp[1] ^ mdx_tmp[3];