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diff --git a/libraries/libldap/sortctrl.c b/libraries/libldap/sortctrl.c
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+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 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>.
+ */
+/* Portions Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
+ *
+ * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND
+ * TREATIES. USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT
+ * TO VERSION 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS
+ * AVAILABLE AT HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE"
+ * IN THE TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION
+ * OF THIS WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP
+ * PUBLIC LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT
+ * THE PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
+ */
+/* Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
+ * can be found in the file "build/LICENSE-2.0.1" in this distribution
+ * of OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/time.h>
+
+#include "ldap-int.h"
+
+#define LDAP_MATCHRULE_IDENTIFIER 0x80L
+#define LDAP_REVERSEORDER_IDENTIFIER 0x81L
+#define LDAP_ATTRTYPES_IDENTIFIER 0x80L
+
+
+
+/* ---------------------------------------------------------------------------
+ countKeys
+
+ Internal function to determine the number of keys in the string.
+
+ keyString (IN) String of items separated by whitespace.
+ ---------------------------------------------------------------------------*/
+
+static int countKeys(char *keyString)
+{
+ char *p = keyString;
+ int count = 0;
+
+ for (;;)
+ {
+ while (LDAP_SPACE(*p)) /* Skip leading whitespace */
+ p++;
+
+ if (*p == '\0') /* End of string? */
+ return count;
+
+ count++; /* Found start of a key */
+
+ while (!LDAP_SPACE(*p)) /* Skip till next space or end of string. */
+ if (*p++ == '\0')
+ return count;
+ }
+}
+
+
+/* ---------------------------------------------------------------------------
+ readNextKey
+
+ Internal function to parse the next sort key in the string.
+ Allocate an LDAPSortKey structure and initialize it with
+ attribute name, reverse flag, and matching rule OID.
+
+ Each sort key in the string has the format:
+ [whitespace][-]attribute[:[OID]]
+
+ pNextKey (IN/OUT) Points to the next key in the sortkey string to parse.
+ The pointer is updated to point to the next character
+ after the sortkey being parsed.
+
+ key (OUT) Points to the address of an LDAPSortKey structure
+ which has been allocated by this routine and
+ initialized with information from the next sortkey.
+ ---------------------------------------------------------------------------*/
+
+static int readNextKey( char **pNextKey, LDAPSortKey **key)
+{
+ char *p = *pNextKey;
+ int rev = 0;
+ char *attrStart;
+ int attrLen;
+ char *oidStart = NULL;
+ int oidLen = 0;
+
+ /* Skip leading white space. */
+ while (LDAP_SPACE(*p))
+ p++;
+
+ if (*p == '-') /* Check if the reverse flag is present. */
+ {
+ rev=1;
+ p++;
+ }
+
+ /* We're now positioned at the start of the attribute. */
+ attrStart = p;
+
+ /* Get the length of the attribute until the next whitespace or ":". */
+ attrLen = strcspn(p, " \t:");
+ p += attrLen;
+
+ if (attrLen == 0) /* If no attribute name was present, quit. */
+ return LDAP_PARAM_ERROR;
+
+ if (*p == ':')
+ {
+ oidStart = ++p; /* Start of the OID, after the colon */
+ oidLen = strcspn(p, " \t"); /* Get length of OID till next whitespace */
+ p += oidLen;
+ }
+
+ *pNextKey = p; /* Update argument to point to next key */
+
+ /* Allocate an LDAPSortKey structure */
+ *key = LDAP_MALLOC(sizeof(LDAPSortKey));
+ if (*key == NULL) return LDAP_NO_MEMORY;
+
+ /* Allocate memory for the attribute and copy to it. */
+ (*key)->attributeType = LDAP_MALLOC(attrLen+1);
+ if ((*key)->attributeType == NULL) {
+ LDAP_FREE(*key);
+ return LDAP_NO_MEMORY;
+ }
+
+ strncpy((*key)->attributeType, attrStart, attrLen);
+ (*key)->attributeType[attrLen] = 0;
+
+ /* If present, allocate memory for the OID and copy to it. */
+ if (oidLen) {
+ (*key)->orderingRule = LDAP_MALLOC(oidLen+1);
+ if ((*key)->orderingRule == NULL) {
+ LDAP_FREE((*key)->attributeType);
+ LDAP_FREE(*key);
+ return LDAP_NO_MEMORY;
+ }
+ strncpy((*key)->orderingRule, oidStart, oidLen);
+ (*key)->orderingRule[oidLen] = 0;
+
+ } else {
+ (*key)->orderingRule = NULL;
+ }
+
+ (*key)->reverseOrder = rev;
+
+ return LDAP_SUCCESS;
+}
+
+
+/* ---------------------------------------------------------------------------
+ ldap_create_sort_keylist
+
+ Create an array of pointers to LDAPSortKey structures, containing the
+ information specified by the string representation of one or more
+ sort keys.
+
+ sortKeyList (OUT) Points to a null-terminated array of pointers to
+ LDAPSortKey structures allocated by this routine.
+ This memory SHOULD be freed by the calling program
+ using ldap_free_sort_keylist().
+
+ keyString (IN) Points to a string of one or more sort keys.
+
+ ---------------------------------------------------------------------------*/
+
+int
+ldap_create_sort_keylist ( LDAPSortKey ***sortKeyList, char *keyString )
+{
+ int numKeys, rc, i;
+ char *nextKey;
+ LDAPSortKey **keyList = NULL;
+
+ assert( sortKeyList != NULL );
+ assert( keyString != NULL );
+
+ *sortKeyList = NULL;
+
+ /* Determine the number of sort keys so we can allocate memory. */
+ if (( numKeys = countKeys(keyString)) == 0) {
+ return LDAP_PARAM_ERROR;
+ }
+
+ /* Allocate the array of pointers. Initialize to NULL. */
+ keyList=(LDAPSortKey**)LBER_CALLOC(numKeys+1, sizeof(LDAPSortKey*));
+ if ( keyList == NULL) return LDAP_NO_MEMORY;
+
+ /* For each sort key in the string, create an LDAPSortKey structure
+ and add it to the list.
+ */
+ nextKey = keyString; /* Points to the next key in the string */
+ for (i=0; i < numKeys; i++) {
+ rc = readNextKey(&nextKey, &keyList[i]);
+
+ if (rc != LDAP_SUCCESS) {
+ ldap_free_sort_keylist(keyList);
+ return rc;
+ }
+ }
+
+ *sortKeyList = keyList;
+ return LDAP_SUCCESS;
+}
+
+
+/* ---------------------------------------------------------------------------
+ ldap_free_sort_keylist
+
+ Frees the sort key structures created by ldap_create_sort_keylist().
+ Frees the memory referenced by the LDAPSortKey structures,
+ the LDAPSortKey structures themselves, and the array of pointers
+ to the structures.
+
+ keyList (IN) Points to an array of pointers to LDAPSortKey structures.
+ ---------------------------------------------------------------------------*/
+
+void
+ldap_free_sort_keylist ( LDAPSortKey **keyList )
+{
+ int i;
+ LDAPSortKey *nextKeyp;
+
+ if (keyList == NULL) return;
+
+ i=0;
+ while ( 0 != (nextKeyp = keyList[i++]) ) {
+ if (nextKeyp->attributeType) {
+ LBER_FREE(nextKeyp->attributeType);
+ }
+
+ if (nextKeyp->orderingRule != NULL) {
+ LBER_FREE(nextKeyp->orderingRule);
+ }
+
+ LBER_FREE(nextKeyp);
+ }
+
+ LBER_FREE(keyList);
+}
+
+
+/* ---------------------------------------------------------------------------
+ ldap_create_sort_control_value
+
+ Create and encode the value of the server-side sort control.
+
+ ld (IN) An LDAP session handle, as obtained from a call to
+ ldap_init().
+
+ keyList (IN) Points to a null-terminated array of pointers to
+ LDAPSortKey structures, containing a description of
+ each of the sort keys to be used. The description
+ consists of an attribute name, ascending/descending flag,
+ and an optional matching rule (OID) to use.
+
+ value (OUT) Contains the control value; the bv_val member of the berval structure
+ SHOULD be freed by calling ldap_memfree() when done.
+
+
+ Ber encoding
+
+ SortKeyList ::= SEQUENCE OF SEQUENCE {
+ attributeType AttributeDescription,
+ orderingRule [0] MatchingRuleId OPTIONAL,
+ reverseOrder [1] BOOLEAN DEFAULT FALSE }
+
+ ---------------------------------------------------------------------------*/
+
+int
+ldap_create_sort_control_value(
+ LDAP *ld,
+ LDAPSortKey **keyList,
+ struct berval *value )
+{
+ int i;
+ BerElement *ber = NULL;
+ ber_tag_t tag;
+
+ assert( ld != NULL );
+ assert( LDAP_VALID( ld ) );
+
+ if ( ld == NULL ) return LDAP_PARAM_ERROR;
+ if ( keyList == NULL || value == NULL ) {
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return LDAP_PARAM_ERROR;
+ }
+
+ value->bv_val = NULL;
+ value->bv_len = 0;
+ ld->ld_errno = LDAP_SUCCESS;
+
+ ber = ldap_alloc_ber_with_options( ld );
+ if ( ber == NULL) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return ld->ld_errno;
+ }
+
+ tag = ber_printf( ber, "{" /*}*/ );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+
+ for ( i = 0; keyList[i] != NULL; i++ ) {
+ tag = ber_printf( ber, "{s" /*}*/, keyList[i]->attributeType );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+
+ if ( keyList[i]->orderingRule != NULL ) {
+ tag = ber_printf( ber, "ts",
+ LDAP_MATCHRULE_IDENTIFIER,
+ keyList[i]->orderingRule );
+
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+ }
+
+ if ( keyList[i]->reverseOrder ) {
+ tag = ber_printf( ber, "tb",
+ LDAP_REVERSEORDER_IDENTIFIER,
+ keyList[i]->reverseOrder );
+
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+ }
+
+ tag = ber_printf( ber, /*{*/ "N}" );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+ }
+
+ tag = ber_printf( ber, /*{*/ "N}" );
+ if ( tag == LBER_ERROR ) {
+ goto error_return;
+ }
+
+ if ( ber_flatten2( ber, value, 1 ) == -1 ) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ }
+
+ if ( 0 ) {
+error_return:;
+ ld->ld_errno = LDAP_ENCODING_ERROR;
+ }
+
+ if ( ber != NULL ) {
+ ber_free( ber, 1 );
+ }
+
+ return ld->ld_errno;
+}
+
+
+/* ---------------------------------------------------------------------------
+ ldap_create_sort_control
+
+ Create and encode the server-side sort control.
+
+ ld (IN) An LDAP session handle, as obtained from a call to
+ ldap_init().
+
+ keyList (IN) Points to a null-terminated array of pointers to
+ LDAPSortKey structures, containing a description of
+ each of the sort keys to be used. The description
+ consists of an attribute name, ascending/descending flag,
+ and an optional matching rule (OID) to use.
+
+ isCritical (IN) 0 - Indicates the control is not critical to the operation.
+ non-zero - The control is critical to the operation.
+
+ ctrlp (OUT) Returns a pointer to the LDAPControl created. This control
+ SHOULD be freed by calling ldap_control_free() when done.
+
+
+ Ber encoding
+
+ SortKeyList ::= SEQUENCE OF SEQUENCE {
+ attributeType AttributeDescription,
+ orderingRule [0] MatchingRuleId OPTIONAL,
+ reverseOrder [1] BOOLEAN DEFAULT FALSE }
+
+ ---------------------------------------------------------------------------*/
+
+int
+ldap_create_sort_control(
+ LDAP *ld,
+ LDAPSortKey **keyList,
+ int isCritical,
+ LDAPControl **ctrlp )
+{
+ struct berval value;
+
+ assert( ld != NULL );
+ assert( LDAP_VALID( ld ) );
+
+ if ( ld == NULL ) {
+ return LDAP_PARAM_ERROR;
+ }
+
+ if ( ctrlp == NULL ) {
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return ld->ld_errno;
+ }
+
+ ld->ld_errno = ldap_create_sort_control_value( ld, keyList, &value );
+ if ( ld->ld_errno == LDAP_SUCCESS ) {
+ ld->ld_errno = ldap_control_create( LDAP_CONTROL_SORTREQUEST,
+ isCritical, &value, 0, ctrlp );
+ if ( ld->ld_errno != LDAP_SUCCESS ) {
+ LDAP_FREE( value.bv_val );
+ }
+ }
+
+ return ld->ld_errno;
+}
+
+
+/* ---------------------------------------------------------------------------
+ ldap_parse_sortedresult_control
+
+ Decode the server-side sort control return information.
+
+ ld (IN) An LDAP session handle, as obtained from a call to
+ ldap_init().
+
+ ctrl (IN) The address of the LDAP Control Structure.
+
+ returnCode (OUT) This result parameter is filled in with the sort control
+ result code. This parameter MUST not be NULL.
+
+ attribute (OUT) If an error occurred the server may return a string
+ indicating the first attribute in the sortkey list
+ that was in error. If a string is returned, the memory
+ should be freed with ldap_memfree. If this parameter is
+ NULL, no string is returned.
+
+
+ Ber encoding for sort control
+
+ SortResult ::= SEQUENCE {
+ sortResult ENUMERATED {
+ success (0), -- results are sorted
+ operationsError (1), -- server internal failure
+ timeLimitExceeded (3), -- timelimit reached before
+ -- sorting was completed
+ strongAuthRequired (8), -- refused to return sorted
+ -- results via insecure
+ -- protocol
+ adminLimitExceeded (11), -- too many matching entries
+ -- for the server to sort
+ noSuchAttribute (16), -- unrecognized attribute
+ -- type in sort key
+ inappropriateMatching (18), -- unrecognized or inappro-
+ -- priate matching rule in
+ -- sort key
+ insufficientAccessRights (50), -- refused to return sorted
+ -- results to this client
+ busy (51), -- too busy to process
+ unwillingToPerform (53), -- unable to sort
+ other (80)
+ },
+ attributeType [0] AttributeDescription OPTIONAL }
+ ---------------------------------------------------------------------------*/
+
+int
+ldap_parse_sortresponse_control(
+ LDAP *ld,
+ LDAPControl *ctrl,
+ ber_int_t *returnCode,
+ char **attribute )
+{
+ BerElement *ber;
+ ber_tag_t tag, berTag;
+ ber_len_t berLen;
+
+ assert( ld != NULL );
+ assert( LDAP_VALID( ld ) );
+
+ if (ld == NULL) {
+ return LDAP_PARAM_ERROR;
+ }
+
+ if (ctrl == NULL) {
+ ld->ld_errno = LDAP_PARAM_ERROR;
+ return(ld->ld_errno);
+ }
+
+ if (attribute) {
+ *attribute = NULL;
+ }
+
+ if ( strcmp(LDAP_CONTROL_SORTRESPONSE, ctrl->ldctl_oid) != 0 ) {
+ /* Not sort result control */
+ ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
+ return(ld->ld_errno);
+ }
+
+ /* Create a BerElement from the berval returned in the control. */
+ ber = ber_init(&ctrl->ldctl_value);
+
+ if (ber == NULL) {
+ ld->ld_errno = LDAP_NO_MEMORY;
+ return(ld->ld_errno);
+ }
+
+ /* Extract the result code from the control. */
+ tag = ber_scanf(ber, "{e" /*}*/, returnCode);
+
+ if( tag == LBER_ERROR ) {
+ ber_free(ber, 1);
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ return(ld->ld_errno);
+ }
+
+ /* If caller wants the attribute name, and if it's present in the control,
+ extract the attribute name which caused the error. */
+ if (attribute && (LDAP_ATTRTYPES_IDENTIFIER == ber_peek_tag(ber, &berLen)))
+ {
+ tag = ber_scanf(ber, "ta", &berTag, attribute);
+
+ if (tag == LBER_ERROR ) {
+ ber_free(ber, 1);
+ ld->ld_errno = LDAP_DECODING_ERROR;
+ return(ld->ld_errno);
+ }
+ }
+
+ ber_free(ber,1);
+
+ ld->ld_errno = LDAP_SUCCESS;
+ return(ld->ld_errno);
+}
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