verify credentials extop: support for simple bind

contrib/slapd-modules/vc/Makefile

+# $OpenLDAP$
+# This work is part of OpenLDAP Software <http://www.openldap.org/>.
+#
+# Copyright 1998-2010 The OpenLDAP Foundation.
+# Copyright 2004 Howard Chu, Symas Corp. 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>.
+
+LIBTOOL=../../../libtool
+OPT=-g -O2
+#LIBTOOL=../../../../ldap-devel/libtool
+#OPT=-g -O0
+CC=gcc
+
+LDAP_INC=-I../../../include -I../../../servers/slapd
+#LDAP_INC=-I../../../include -I../../../servers/slapd -I../../../../ldap-devel/include
+INCS=$(LDAP_INC)
+
+LDAP_LIB=-lldap_r -llber
+LIBS=$(LDAP_LIB)
+
+prefix=/usr/local
+exec_prefix=$(prefix)
+ldap_subdir=/openldap
+
+libdir=$(exec_prefix)/lib
+libexecdir=$(exec_prefix)/libexec
+moduledir = $(libexecdir)$(ldap_subdir)
+
+all:	vc.la
+
+
+vc.lo:	vc.c
+	$(LIBTOOL) --mode=compile $(CC) $(OPT) $(DEFS) $(INCS) -c $?
+
+vc.la:	vc.lo
+	$(LIBTOOL) --mode=link $(CC) $(OPT) -version-info 0:0:0 \
+	-rpath $(moduledir) -module -o $@ $? $(LIBS)
+
+clean:
+	rm -f vc.lo vc.la
+
+install: vc.la
+	mkdir -p $(DESTDIR)$(moduledir)
+	$(LIBTOOL) --mode=install cp vc.la $(DESTDIR)$(moduledir)
+

contrib/slapd-modules/vc/vc.c

+/* vc.c - LDAP Verify Credentials extop (no spec yet) */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2010 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>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Pierangelo Masarati for inclusion
+ * in OpenLDAP Software.
+ */
+
+/*
+ * LDAP Verify Credentials: suggested by Kurt Zeilenga
+ * no spec yet
+ */
+
+#include "portable.h"
+
+#include "slap.h"
+#include "ac/string.h"
+
+static const struct berval vc_exop_oid_bv = BER_BVC(LDAP_EXOP_VERIFY_CREDENTIALS);
+
+static int
+vc_exop(
+	Operation	*op,
+	SlapReply	*rs )
+{
+	int rc = LDAP_SUCCESS;
+	ber_tag_t tag;
+	ber_len_t len = -1;
+	BerElementBuffer berbuf;
+	BerElement *ber = (BerElement *)&berbuf;
+	struct berval reqdata = BER_BVNULL;
+
+	if ( op->ore_reqdata == NULL || op->ore_reqdata->bv_len == 0 ) {
+		rs->sr_text = "empty request data field in VerifyCredentials exop";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	ber_dupbv_x( &reqdata, op->ore_reqdata, op->o_tmpmemctx );
+
+	/* ber_init2 uses reqdata directly, doesn't allocate new buffers */
+	ber_init2( ber, &reqdata, 0 );
+
+	tag = ber_scanf( ber, "{" /*}*/ );
+	if ( tag != LBER_SEQUENCE ) {
+		rs->sr_err = LDAP_PROTOCOL_ERROR;
+		goto done;
+	}
+
+	tag = ber_peek_tag( ber, &len );
+	if ( tag == LBER_INTEGER ) {
+		ber_int_t version;
+		struct berval bdn;
+		ber_tag_t authtag;
+		struct berval cred;
+		struct berval ndn;
+		Attribute a = { 0 };
+
+		/* simple */
+
+		/* version */
+		tag = ber_scanf( ber, "i", &version );
+		if ( tag == LBER_ERROR || version != 3 ) {
+			rs->sr_err = LDAP_PROTOCOL_ERROR;
+			goto done;
+		}
+
+		/* DN, authtag, cred */
+		tag = ber_scanf( ber, "mtm", &bdn, &authtag, &cred );
+		if ( tag == LBER_ERROR || authtag != LDAP_AUTH_SIMPLE ) {
+			rs->sr_err = LDAP_PROTOCOL_ERROR;
+			goto done;
+		}
+
+		rc = dnNormalize( 0, NULL, NULL, &bdn, &ndn, op->o_tmpmemctx );
+		if ( rc != LDAP_SUCCESS ) {
+			rs->sr_err = LDAP_PROTOCOL_ERROR;
+			goto done;
+		}
+
+		a.a_desc = slap_schema.si_ad_userPassword;
+		rc = backend_attribute( op, NULL, &ndn, a.a_desc, &a.a_vals, ACL_AUTH );
+		if ( rc != LDAP_SUCCESS || a.a_vals == NULL ) {
+			rs->sr_err = LDAP_INVALID_CREDENTIALS;
+
+		} else {
+			a.a_nvals = a.a_vals;
+			for ( a.a_numvals = 0; !BER_BVISNULL( &a.a_nvals[a.a_numvals] ); a.a_numvals++ )
+				;
+
+			rc = slap_passwd_check( op, NULL, &a, &cred, &rs->sr_text );
+			if ( rc != 0 ) {
+				rs->sr_err = LDAP_INVALID_CREDENTIALS;
+
+			} else {
+				rs->sr_err = LDAP_SUCCESS;
+				rs->sr_rspoid = NULL;
+				rs->sr_rspdata = NULL;
+			}
+		}
+
+		op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
+		op->o_tmpfree( a.a_vals, op->o_tmpmemctx );
+
+	} else {
+		/* SASL */
+		if ( tag == LDAP_TAG_EXOP_VERIFY_CREDENTIALS_COOKIE ) {
+		} else {
+		}
+	}
+
+	tag = ber_skip_tag( ber, &len );
+	if ( len || tag != LBER_DEFAULT ) {
+		rs->sr_err = LDAP_PROTOCOL_ERROR;
+		goto done;
+	}
+
+done:;
+	op->o_tmpfree( reqdata.bv_val, op->o_tmpmemctx );
+
+        return rs->sr_err;
+}
+
+static int
+vc_initialize( void )
+{
+	int rc;
+
+	rc = load_extop2( (struct berval *)&vc_exop_oid_bv,
+		SLAP_EXOP_HIDE, vc_exop, 0 );
+	if ( rc != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY,
+			"vc_initialize: unable to register VerifyCredentials exop: %d.\n",
+			rc, 0, 0 );
+	}
+
+	return rc;
+}
+
+int
+init_module( int argc, char *argv[] )
+{
+	return vc_initialize();
+}
+