1 files changed, 81 insertions, 0 deletions
diff --git a/contrib/slapd-modules/passwd/netscape.c b/contrib/slapd-modules/passwd/netscape.c
new file mode 100644
index 0000000..0551fe6
--- /dev/null
+++ b/contrib/slapd-modules/passwd/netscape.c
@@ -0,0 +1,81 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include <unistd.h>
+
+#include <lber.h>
+#include <lber_pvt.h>
+#include "lutil.h"
+#include "lutil_md5.h"
+#include <ac/string.h>
+
+static LUTIL_PASSWD_CHK_FUNC chk_ns_mta_md5;
+static const struct berval scheme = BER_BVC("{NS-MTA-MD5}");
+
+#define NS_MTA_MD5_PASSLEN	64
+static int chk_ns_mta_md5(
+	const struct berval *scheme,
+	const struct berval *passwd,
+	const struct berval *cred,
+	const char **text )
+{
+	lutil_MD5_CTX MD5context;
+	unsigned char MD5digest[LUTIL_MD5_BYTES], c;
+	char buffer[LUTIL_MD5_BYTES*2];
+	int i;
+
+	if( passwd->bv_len != NS_MTA_MD5_PASSLEN ) {
+		return LUTIL_PASSWD_ERR;
+	}
+
+	/* hash credentials with salt */
+	lutil_MD5Init(&MD5context);
+	lutil_MD5Update(&MD5context,
+		(const unsigned char *) &passwd->bv_val[32],
+		32 );
+
+	c = 0x59;
+	lutil_MD5Update(&MD5context,
+		(const unsigned char *) &c,
+		1 );
+
+	lutil_MD5Update(&MD5context,
+		(const unsigned char *) cred->bv_val,
+		cred->bv_len );
+
+	c = 0xF7;
+	lutil_MD5Update(&MD5context,
+		(const unsigned char *) &c,
+		1 );
+
+	lutil_MD5Update(&MD5context,
+		(const unsigned char *) &passwd->bv_val[32],
+		32 );
+
+	lutil_MD5Final(MD5digest, &MD5context);
+
+	for( i=0; i < sizeof( MD5digest ); i++ ) {
+		buffer[i+i]   = "0123456789abcdef"[(MD5digest[i]>>4) & 0x0F]; 
+		buffer[i+i+1] = "0123456789abcdef"[ MD5digest[i] & 0x0F]; 
+	}
+
+	/* compare */
+	return memcmp((char *)passwd->bv_val,
+		(char *)buffer, sizeof(buffer)) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
+}
+
+int init_module(int argc, char *argv[]) {
+	return lutil_passwd_add( (struct berval *)&scheme, chk_ns_mta_md5, NULL );
+}