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9776cb63ad
folding to 64 bits, while SHA1 code is big endian. Therefore, a bswap32 is required before using the value. Without this change, the implementation does not conform to test vector found in RFC 2289. PR: bin/170519 Submitted by: Arthur Mesh <arthurmesh gmail com> (with changes) MFC after: 1 week
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/* hash.c: The opiehash() library function.
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%%% copyright-cmetz-96
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This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
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The Inner Net License Version 3 applies to this software.
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You should have received a copy of the license with this software. If
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you didn't get a copy, you may request one from <license@inner.net>.
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History:
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Modified by cmetz for OPIE 2.4. Use struct opie_otpkey for binary arg.
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Modified by cmetz for OPIE 2.31. Added SHA support (which may
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not be correct). Backed out previous optimizations as
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they killed thread-safety.
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Created by cmetz for OPIE 2.3 using the old hash.c as a guide.
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$FreeBSD$
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*/
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#include <sys/endian.h>
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#include "opie_cfg.h"
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#include "opie.h"
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#include <sha.h>
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#include <md4.h>
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#include <md5.h>
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VOIDRET opiehash FUNCTION((x, algorithm), struct opie_otpkey *x AND
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unsigned algorithm)
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{
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UINT4 *results = (UINT4 *)x;
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switch(algorithm) {
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case 3:
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{
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SHA_CTX sha;
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UINT4 digest[5];
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SHA1_Init(&sha);
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SHA1_Update(&sha, (unsigned char *)x, 8);
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SHA1_Final((unsigned char *)digest, &sha);
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results[0] = digest[0] ^ digest[2] ^ digest[4];
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results[1] = digest[1] ^ digest[3];
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/*
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* RFC2289 mandates that we convert SHA1 digest from big-endian to little
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* see Appendix A.
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*/
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results[0] = bswap32(results[0]);
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results[1] = bswap32(results[1]);
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};
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break;
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case 4:
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{
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MD4_CTX mdx;
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UINT4 mdx_tmp[4];
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MD4Init(&mdx);
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MD4Update(&mdx, (unsigned char *)x, 8);
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MD4Final((unsigned char *)mdx_tmp, &mdx);
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results[0] = mdx_tmp[0] ^ mdx_tmp[2];
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results[1] = mdx_tmp[1] ^ mdx_tmp[3];
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};
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break;
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case 5:
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{
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MD5_CTX mdx;
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UINT4 mdx_tmp[4];
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MD5Init(&mdx);
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MD5Update(&mdx, (unsigned char *)x, 8);
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MD5Final((unsigned char *)mdx_tmp, &mdx);
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results[0] = mdx_tmp[0] ^ mdx_tmp[2];
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results[1] = mdx_tmp[1] ^ mdx_tmp[3];
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};
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break;
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}
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}
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