92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*
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* Copyright (C) 1998,2002 Nikos Mavroyanopoulos
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* Copyright (C) 1999,2000 Sascha Schumman, Nikos Mavroyanopoulos
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Library General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "libdefs.h"
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#ifdef WIN32
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/* Provided by Stefan Hetzl <shetzl@chello.at>
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* in order for isxdigit to work on cygwin.
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*/
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static char hexdigits[] = { '0', '1', '2', '3', '4',
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'5', '6', '7', '8', '9',
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'a', 'b', 'c', 'd', 'e', 'f',
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'A', 'B', 'C', 'D', 'E', 'F' } ;
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static mutils_boolean ishexdigit (mutils_word8 d)
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{
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mutils_word8 i;
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for (i = 0; i < 22 ; i++)
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if (d == hexdigits[i])
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return(MUTILS_TRUE);
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return(MUTILS_FALSE);
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}
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#else
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# include <ctype.h>
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# define ishexdigit isxdigit
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#endif
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static mutils_boolean check_hex(mutils_word8 *given_chain, mutils_word32 len)
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{
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mutils_word8 i;
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for (i = 0; i < len; i++)
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if (ishexdigit(given_chain[i]) == MUTILS_FALSE)
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return(MUTILS_FALSE);
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return(MUTILS_TRUE);
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}
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mutils_error _mhash_gen_key_hex(void *keyword, mutils_word32 key_size,
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mutils_word8 *password, mutils_word32 plen)
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{
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mutils_word8 *chain = password;
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mutils_word8 *pkeyword = keyword;
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mutils_word8 tmp[3];
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mutils_word32 i;
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mutils_bzero(keyword, key_size);
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/* The chain should have 2*n characters
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*/
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if (plen % 2 != 0 || plen > key_size*2)
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return(-MUTILS_INVALID_SIZE);
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if (check_hex(chain, plen) == MUTILS_FALSE)
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return(-MUTILS_INVALID_FORMAT);
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mutils_bzero( keyword, key_size);
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for (i = 0; i < plen; i += 2) {
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mutils_memcpy(tmp, &chain[i], 2);
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tmp[2] = '\0';
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pkeyword[i / 2] = mutils_strtol(tmp, (mutils_word8 **) NULL, 16);
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}
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return(MUTILS_OK);
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}
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