1 files changed, 86 insertions, 0 deletions
diff --git a/contrib/pgcrypto/mhash.c b/contrib/pgcrypto/mhash.c
new file mode 100644
index 00000000000..ed16c124dfc
--- /dev/null
+++ b/contrib/pgcrypto/mhash.c
@@ -0,0 +1,86 @@
+/*
+ * 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 1.1 2000/10/31 13:11:28 petere 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;
+}
+