1 files changed, 231 insertions, 0 deletions
diff --git a/servers/slapd/mra.c b/servers/slapd/mra.c
new file mode 100644
index 0000000..1cbd98f
--- /dev/null
+++ b/servers/slapd/mra.c
@@ -0,0 +1,231 @@
+/* mra.c - routines for dealing with extensible matching rule assertions */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2018 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 "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "slap.h"
+
+#ifdef LDAP_COMP_MATCH
+#include "component.h"
+#endif
+
+void
+mra_free(
+	Operation *op,
+	MatchingRuleAssertion *mra,
+	int	freeit )
+{
+#ifdef LDAP_COMP_MATCH
+	/* free component assertion */
+	if ( mra->ma_rule->smr_usage & SLAP_MR_COMPONENT && mra->ma_cf ) {
+		component_free( mra->ma_cf );
+	}
+#endif
+	/* op->o_tmpfree( mra->ma_value.bv_val, op->o_tmpmemctx ); */
+	ch_free( mra->ma_value.bv_val );
+	if ( mra->ma_desc && mra->ma_desc->ad_flags & SLAP_DESC_TEMPORARY )
+		op->o_tmpfree( mra->ma_desc, op->o_tmpmemctx );
+	if ( freeit ) op->o_tmpfree( (char *) mra, op->o_tmpmemctx );
+}
+
+int
+get_mra(
+	Operation *op,
+	BerElement	*ber,
+	Filter *f,
+	const char **text )
+{
+	int rc;
+	ber_tag_t tag, rtag;
+	ber_len_t length;
+	struct berval type = BER_BVNULL;
+	struct berval value = BER_BVNULL;
+	struct berval rule_text = BER_BVNULL;
+	MatchingRuleAssertion ma = { 0 };
+#ifdef LDAP_COMP_MATCH
+	AttributeAliasing* aa = NULL;
+#endif
+
+	rtag = ber_scanf( ber, "{t" /*"}"*/, &tag );
+
+	if( rtag == LBER_ERROR ) {
+		Debug( LDAP_DEBUG_ANY, "  get_mra ber_scanf\n", 0, 0, 0 );
+
+		*text = "Error parsing matching rule assertion";
+		return SLAPD_DISCONNECT;
+	}
+
+	if ( tag == LDAP_FILTER_EXT_OID ) {
+		rtag = ber_scanf( ber, "m", &rule_text );
+		if ( rtag == LBER_ERROR ) {
+			Debug( LDAP_DEBUG_ANY, "  get_mra ber_scanf for mr\n", 0, 0, 0 );
+
+			*text = "Error parsing matching rule in matching rule assertion";
+			return SLAPD_DISCONNECT;
+		}
+
+		rtag = ber_scanf( ber, "t", &tag );
+		if( rtag == LBER_ERROR ) {
+			Debug( LDAP_DEBUG_ANY, "  get_mra ber_scanf\n", 0, 0, 0 );
+
+			*text = "Error parsing matching rule assertion";
+			return SLAPD_DISCONNECT;
+		}
+	}
+
+	if ( tag == LDAP_FILTER_EXT_TYPE ) {
+		rtag = ber_scanf( ber, "m", &type );
+		if ( rtag == LBER_ERROR ) {
+			Debug( LDAP_DEBUG_ANY, "  get_mra ber_scanf for ad\n", 0, 0, 0 );
+
+			*text = "Error parsing attribute description in matching rule assertion";
+			return SLAPD_DISCONNECT;
+		}
+
+		rtag = ber_scanf( ber, "t", &tag );
+		if( rtag == LBER_ERROR ) {
+			Debug( LDAP_DEBUG_ANY, "  get_mra ber_scanf\n", 0, 0, 0 );
+
+			*text = "Error parsing matching rule assertion";
+			return SLAPD_DISCONNECT;
+		}
+	}
+
+	if ( tag != LDAP_FILTER_EXT_VALUE ) {
+		Debug( LDAP_DEBUG_ANY, "  get_mra ber_scanf missing value\n", 0, 0, 0 );
+
+		*text = "Missing value in matching rule assertion";
+		return SLAPD_DISCONNECT;
+	}
+
+	rtag = ber_scanf( ber, "m", &value );
+
+	if( rtag == LBER_ERROR ) {
+		Debug( LDAP_DEBUG_ANY, "  get_mra ber_scanf\n", 0, 0, 0 );
+
+		*text = "Error decoding value in matching rule assertion";
+		return SLAPD_DISCONNECT;
+	}
+
+	tag = ber_peek_tag( ber, &length );
+
+	if ( tag == LDAP_FILTER_EXT_DNATTRS ) {
+		rtag = ber_scanf( ber, /*"{"*/ "b}", &ma.ma_dnattrs );
+	} else {
+		rtag = ber_scanf( ber, /*"{"*/ "}" );
+	}
+
+	if( rtag == LBER_ERROR ) {
+		Debug( LDAP_DEBUG_ANY, "  get_mra ber_scanf\n", 0, 0, 0 );
+
+		*text = "Error decoding dnattrs matching rule assertion";
+		return SLAPD_DISCONNECT;
+	}
+
+	if( type.bv_val != NULL ) {
+		rc = slap_bv2ad( &type, &ma.ma_desc, text );
+		if( rc != LDAP_SUCCESS ) {
+			f->f_choice |= SLAPD_FILTER_UNDEFINED;
+			rc = slap_bv2undef_ad( &type, &ma.ma_desc, text,
+				SLAP_AD_PROXIED|SLAP_AD_NOINSERT );
+
+			if( rc != LDAP_SUCCESS ) {
+				ma.ma_desc = slap_bv2tmp_ad( &type, op->o_tmpmemctx );
+				rc = LDAP_SUCCESS;
+			}
+		}
+	}
+
+	if( rule_text.bv_val != NULL ) {
+		ma.ma_rule = mr_bvfind( &rule_text );
+		if( ma.ma_rule == NULL ) {
+			*text = "matching rule not recognized";
+			return LDAP_INAPPROPRIATE_MATCHING;
+		}
+	}
+
+	if ( ma.ma_rule == NULL ) {
+		/*
+		 * Need either type or rule ...
+		 */
+		if ( ma.ma_desc == NULL ) {
+			*text = "no matching rule or type";
+			return LDAP_INAPPROPRIATE_MATCHING;
+		}
+
+		if ( ma.ma_desc->ad_type->sat_equality != NULL &&
+			ma.ma_desc->ad_type->sat_equality->smr_usage & SLAP_MR_EXT )
+		{
+			/* no matching rule was provided, use the attribute's
+			   equality rule if it supports extensible matching. */
+			ma.ma_rule = ma.ma_desc->ad_type->sat_equality;
+
+		} else {
+			*text = "no appropriate rule to use for type";
+			return LDAP_INAPPROPRIATE_MATCHING;
+		}
+	}
+
+	if ( ma.ma_desc != NULL ) {
+		if( !mr_usable_with_at( ma.ma_rule, ma.ma_desc->ad_type ) ) {
+			*text = "matching rule use with this attribute not appropriate";
+			return LDAP_INAPPROPRIATE_MATCHING;
+		}
+
+	}
+
+	/*
+	 * Normalize per matching rule
+	 */
+	rc = asserted_value_validate_normalize( ma.ma_desc,
+		ma.ma_rule,
+		SLAP_MR_EXT|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
+		&value, &ma.ma_value, text, op->o_tmpmemctx );
+
+	if( rc != LDAP_SUCCESS ) return rc;
+
+#ifdef LDAP_COMP_MATCH
+	/* Check If this attribute is aliased */
+	if ( is_aliased_attribute && ma.ma_desc && ( aa = is_aliased_attribute ( ma.ma_desc ) ) ) {
+		rc = get_aliased_filter ( op, &ma, aa, text );
+		if ( rc != LDAP_SUCCESS ) return rc;
+	}
+	else if ( ma.ma_rule && ma.ma_rule->smr_usage & SLAP_MR_COMPONENT ) {
+		/* Matching Rule for Component Matching */
+		rc = get_comp_filter( op, &ma.ma_value, &ma.ma_cf, text );
+		if ( rc != LDAP_SUCCESS ) return rc;
+	}
+#endif
+
+	length = sizeof(ma);
+	/* Append rule_text to end of struct */
+	if (rule_text.bv_val) length += rule_text.bv_len + 1;
+	f->f_mra = op->o_tmpalloc( length, op->o_tmpmemctx );
+	*f->f_mra = ma;
+	if (rule_text.bv_val) {
+		f->f_mra->ma_rule_text.bv_len = rule_text.bv_len;
+		f->f_mra->ma_rule_text.bv_val = (char *)(f->f_mra+1);
+		AC_MEMCPY(f->f_mra->ma_rule_text.bv_val, rule_text.bv_val,
+			rule_text.bv_len+1);
+	}
+
+	return LDAP_SUCCESS;
+}