70a07c093d
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@12048 ec53bebd-3082-4978-b11e-865c3cabbd6b
285 lines
6.7 KiB
C
285 lines
6.7 KiB
C
/*
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* Copyright (c) 1995 - 2003 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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RCSID("$Id$");
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#endif
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#include "otp_locl.h"
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#include "otp_md.h"
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#include "crypto-headers.h"
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/*
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* Compress len bytes from md into key
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*/
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static void
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compressmd (OtpKey key, unsigned char *md, size_t len)
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{
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u_char *p = key;
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memset (p, 0, OTPKEYSIZE);
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while(len) {
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*p++ ^= *md++;
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*p++ ^= *md++;
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*p++ ^= *md++;
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*p++ ^= *md++;
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len -= 4;
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if (p == key + OTPKEYSIZE)
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p = key;
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}
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}
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#ifdef HAVE_OLD_HASH_NAMES
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static void
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otp_md4_final (void *res, struct md4 *m)
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{
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MD4_Final(res, m);
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}
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#undef MD4_Final
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#define MD4_Final otp_md4_final
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static void
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otp_md5_final (void *res, struct md5 *m)
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{
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MD5_Final(res, m);
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}
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#undef MD5_Final
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#define MD5_Final otp_md5_final
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#endif
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static int
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otp_md_init (OtpKey key,
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const char *pwd,
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const char *seed,
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void (*init)(void *),
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void (*update)(void *, const void *, size_t),
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void (*final)(void *, void *),
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void *arg,
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unsigned char *res,
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size_t ressz)
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{
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char *p;
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int len;
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len = strlen(pwd) + strlen(seed);
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p = malloc (len + 1);
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if (p == NULL)
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return -1;
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strlcpy (p, seed, len + 1);
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strlwr (p);
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strlcat (p, pwd, len + 1);
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(*init)(arg);
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(*update)(arg, p, len);
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(*final)(res, arg);
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free (p);
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compressmd (key, res, ressz);
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return 0;
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}
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static int
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otp_md_next (OtpKey key,
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void (*init)(void *),
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void (*update)(void *, const void *, size_t),
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void (*final)(void *, void *),
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void *arg,
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unsigned char *res,
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size_t ressz)
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{
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(*init)(arg);
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(*update)(arg, key, OTPKEYSIZE);
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(*final)(res, arg);
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compressmd (key, res, ressz);
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return 0;
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}
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static int
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otp_md_hash (const char *data,
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size_t len,
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void (*init)(void *),
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void (*update)(void *, const void *, size_t),
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void (*final)(void *, void *),
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void *arg,
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unsigned char *res,
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size_t ressz)
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{
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(*init)(arg);
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(*update)(arg, data, len);
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(*final)(res, arg);
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return 0;
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}
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int
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otp_md4_init (OtpKey key, const char *pwd, const char *seed)
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{
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unsigned char res[16];
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MD4_CTX md4;
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return otp_md_init (key, pwd, seed,
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(void (*)(void *))MD4_Init,
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(void (*)(void *, const void *, size_t))MD4_Update,
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(void (*)(void *, void *))MD4_Final,
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&md4, res, sizeof(res));
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}
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int
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otp_md4_hash (const char *data,
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size_t len,
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unsigned char *res)
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{
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MD4_CTX md4;
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return otp_md_hash (data, len,
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(void (*)(void *))MD4_Init,
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(void (*)(void *, const void *, size_t))MD4_Update,
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(void (*)(void *, void *))MD4_Final,
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&md4, res, 16);
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}
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int
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otp_md4_next (OtpKey key)
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{
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unsigned char res[16];
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MD4_CTX md4;
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return otp_md_next (key,
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(void (*)(void *))MD4_Init,
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(void (*)(void *, const void *, size_t))MD4_Update,
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(void (*)(void *, void *))MD4_Final,
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&md4, res, sizeof(res));
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}
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int
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otp_md5_init (OtpKey key, const char *pwd, const char *seed)
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{
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unsigned char res[16];
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MD5_CTX md5;
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return otp_md_init (key, pwd, seed,
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(void (*)(void *))MD5_Init,
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(void (*)(void *, const void *, size_t))MD5_Update,
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(void (*)(void *, void *))MD5_Final,
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&md5, res, sizeof(res));
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}
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int
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otp_md5_hash (const char *data,
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size_t len,
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unsigned char *res)
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{
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MD5_CTX md5;
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return otp_md_hash (data, len,
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(void (*)(void *))MD5_Init,
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(void (*)(void *, const void *, size_t))MD5_Update,
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(void (*)(void *, void *))MD5_Final,
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&md5, res, 16);
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}
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int
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otp_md5_next (OtpKey key)
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{
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unsigned char res[16];
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MD5_CTX md5;
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return otp_md_next (key,
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(void (*)(void *))MD5_Init,
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(void (*)(void *, const void *, size_t))MD5_Update,
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(void (*)(void *, void *))MD5_Final,
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&md5, res, sizeof(res));
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}
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/*
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* For histerical reasons, in the OTP definition it's said that the
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* result from SHA must be stored in little-endian order. See
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* draft-ietf-otp-01.txt.
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*/
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static void
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SHA1_Final_little_endian (void *res, SHA_CTX *m)
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{
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unsigned char tmp[20];
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unsigned char *p = res;
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int j;
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SHA1_Final (tmp, m);
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for (j = 0; j < 20; j += 4) {
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p[j] = tmp[j+3];
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p[j+1] = tmp[j+2];
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p[j+2] = tmp[j+1];
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p[j+3] = tmp[j];
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}
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}
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int
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otp_sha_init (OtpKey key, const char *pwd, const char *seed)
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{
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unsigned char res[20];
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SHA_CTX sha1;
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return otp_md_init (key, pwd, seed,
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(void (*)(void *))SHA1_Init,
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(void (*)(void *, const void *, size_t))SHA1_Update,
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(void (*)(void *, void *))SHA1_Final_little_endian,
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&sha1, res, sizeof(res));
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}
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int
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otp_sha_hash (const char *data,
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size_t len,
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unsigned char *res)
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{
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SHA_CTX sha1;
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return otp_md_hash (data, len,
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(void (*)(void *))SHA1_Init,
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(void (*)(void *, const void *, size_t))SHA1_Update,
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(void (*)(void *, void *))SHA1_Final_little_endian,
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&sha1, res, 20);
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}
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int
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otp_sha_next (OtpKey key)
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{
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unsigned char res[20];
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SHA_CTX sha1;
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return otp_md_next (key,
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(void (*)(void *))SHA1_Init,
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(void (*)(void *, const void *, size_t))SHA1_Update,
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(void (*)(void *, void *))SHA1_Final_little_endian,
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&sha1, res, sizeof(res));
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}
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