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92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
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* mhash.c
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* Wrapper for mhash library.
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*
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* Copyright (c) 2000 Marko Kreen
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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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* 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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* 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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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $Id: mhash.c,v 1.3 2001/03/22 03:59:10 momjian Exp $
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*/
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#include "postgres.h"
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#include "pgcrypto.h"
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#include <mhash.h>
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static uint
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pg_mhash_len(pg_digest * hash);
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static uint8 *pg_mhash_digest(pg_digest * hash, uint8 *src,
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uint len, uint8 *buf);
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static uint
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pg_mhash_len(pg_digest * h)
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{
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return mhash_get_block_size(h->misc.code);
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}
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static uint8 *
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pg_mhash_digest(pg_digest * h, uint8 *src, uint len, uint8 *dst)
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{
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uint8 *res;
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MHASH mh = mhash_init(h->misc.code);
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mhash(mh, src, len);
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res = mhash_end(mh);
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memcpy(dst, res, mhash_get_block_size(h->misc.code));
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mhash_free(res);
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return dst;
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}
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pg_digest *
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pg_find_digest(pg_digest * h, char *name)
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{
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size_t hnum,
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i,
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b;
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char *mname;
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hnum = mhash_count();
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for (i = 0; i <= hnum; i++)
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{
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mname = mhash_get_hash_name(i);
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if (mname == NULL)
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continue;
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b = strcasecmp(name, mname);
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free(mname);
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if (!b)
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{
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h->name = mhash_get_hash_name(i);
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h->length = pg_mhash_len;
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h->digest = pg_mhash_digest;
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h->misc.code = i;
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return h;
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}
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}
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return NULL;
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}
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