postgresql/contrib/pgcrypto/mhash.c
Tom Lane d08741eab5 Restructure the key include files per recent pghackers discussion: there
are now separate files "postgres.h" and "postgres_fe.h", which are meant
to be the primary include files for backend .c files and frontend .c files
respectively.  By default, only include files meant for frontend use are
installed into the installation include directory.  There is a new make
target 'make install-all-headers' that adds the whole content of the
src/include tree to the installed fileset, for use by people who want to
develop server-side code without keeping the complete source tree on hand.
Cleaned up a whole lot of crufty and inconsistent header inclusions.
2001-02-10 02:31:31 +00:00

88 lines
2.4 KiB
C

/*
* mhash.c
* Wrapper for mhash library.
*
* Copyright (c) 2000 Marko Kreen
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: mhash.c,v 1.2 2001/02/10 02:31:26 tgl Exp $
*/
#include "postgres.h"
#include "pgcrypto.h"
#include <mhash.h>
static uint
pg_mhash_len(pg_digest *hash);
static uint8 *
pg_mhash_digest(pg_digest *hash, uint8 *src,
uint len, uint8 *buf);
static uint
pg_mhash_len(pg_digest *h) {
return mhash_get_block_size(h->misc.code);
}
static uint8 *
pg_mhash_digest(pg_digest *h, uint8 *src, uint len, uint8 *dst)
{
uint8 *res;
MHASH mh = mhash_init(h->misc.code);
mhash(mh, src, len);
res = mhash_end(mh);
memcpy(dst, res, mhash_get_block_size(h->misc.code));
mhash_free(res);
return dst;
}
pg_digest *
pg_find_digest(pg_digest *h, char *name)
{
size_t hnum, i, b;
char *mname;
hnum = mhash_count();
for (i = 0; i <= hnum; i++) {
mname = mhash_get_hash_name(i);
if (mname == NULL)
continue;
b = strcasecmp(name, mname);
free(mname);
if (!b) {
h->name = mhash_get_hash_name(i);
h->length = pg_mhash_len;
h->digest = pg_mhash_digest;
h->misc.code = i;
return h;
}
}
return NULL;
}