Adding upstream version 2.5.13+dfsg.upstream/2.5.13+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 410 insertions, 0 deletions

diff --git a/servers/slapd/back-ldap/extended.c b/servers/slapd/back-ldap/extended.c
new file mode 100644
index 0000000..9b60cad
--- /dev/null
+++ b/servers/slapd/back-ldap/extended.c
@@ -0,0 +1,410 @@
+/* extended.c - ldap backend extended routines */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2022 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>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by the Howard Chu for inclusion
+ * in OpenLDAP Software and subsequently enhanced by Pierangelo
+ * Masarati. 
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/string.h>
+
+#include "slap.h"
+#include "back-ldap.h"
+#include "lber_pvt.h"
+
+typedef int (ldap_back_exop_f)( Operation *op, SlapReply *rs, ldapconn_t **lc );
+
+static ldap_back_exop_f ldap_back_exop_passwd;
+static ldap_back_exop_f ldap_back_exop_generic;
+
+static struct exop {
+	struct berval		oid;
+	ldap_back_exop_f	*extended;
+} exop_table[] = {
+	{ BER_BVC(LDAP_EXOP_MODIFY_PASSWD),	ldap_back_exop_passwd },
+	{ BER_BVNULL, NULL }
+};
+
+static int
+ldap_back_extended_one( Operation *op, SlapReply *rs, ldap_back_exop_f exop )
+{
+	ldapinfo_t	*li = (ldapinfo_t *) op->o_bd->be_private;
+
+	ldapconn_t	*lc = NULL;
+	LDAPControl	**ctrls = NULL, **oldctrls = NULL;
+	int		rc;
+
+	/* FIXME: this needs to be called here, so it is
+	 * called twice; maybe we could avoid the 
+	 * ldap_back_dobind() call inside each extended()
+	 * call ... */
+	if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
+		return -1;
+	}
+
+	ctrls = oldctrls = op->o_ctrls;
+	if ( ldap_back_controls_add( op, rs, lc, &ctrls ) )
+	{
+		op->o_ctrls = oldctrls;
+		send_ldap_extended( op, rs );
+		rs->sr_text = NULL;
+		/* otherwise frontend resends result */
+		rc = rs->sr_err = SLAPD_ABANDON;
+		goto done;
+	}
+
+	op->o_ctrls = ctrls;
+	rc = exop( op, rs, &lc );
+
+	op->o_ctrls = oldctrls;
+	(void)ldap_back_controls_free( op, rs, &ctrls );
+
+done:;
+	if ( lc != NULL ) {
+		ldap_back_release_conn( li, lc );
+	}
+			
+	return rc;
+}
+
+int
+ldap_back_extended(
+		Operation	*op,
+		SlapReply	*rs )
+{
+	int	i;
+
+	RS_ASSERT( !(rs->sr_flags & REP_ENTRY_MASK) );
+	rs->sr_flags &= ~REP_ENTRY_MASK;	/* paranoia */
+
+	for ( i = 0; exop_table[i].extended != NULL; i++ ) {
+		if ( bvmatch( &exop_table[i].oid, &op->oq_extended.rs_reqoid ) )
+		{
+			return ldap_back_extended_one( op, rs, exop_table[i].extended );
+		}
+	}
+
+	/* if we get here, the exop is known; the best that we can do
+	 * is pass it thru as is */
+	/* FIXME: maybe a list of OIDs to pass thru would be safer */
+	return ldap_back_extended_one( op, rs, ldap_back_exop_generic );
+}
+
+static int
+ldap_back_exop_passwd(
+	Operation	*op,
+	SlapReply	*rs,
+	ldapconn_t	**lcp )
+{
+	ldapinfo_t	*li = (ldapinfo_t *) op->o_bd->be_private;
+
+	ldapconn_t	*lc = *lcp;
+	req_pwdexop_s	*qpw = &op->oq_pwdexop;
+	LDAPMessage	*res;
+	ber_int_t	msgid;
+	int		rc, isproxy, freedn = 0;
+	int		do_retry = 1;
+	char		*text = NULL;
+	struct berval	dn = op->o_req_dn,
+			ndn = op->o_req_ndn;
+
+	assert( lc != NULL );
+	assert( rs->sr_ctrls == NULL );
+
+	if ( BER_BVISNULL( &ndn ) && op->ore_reqdata != NULL ) {
+		/* NOTE: most of this code is mutated
+		 * from slap_passwd_parse();
+		 * But here we only need
+		 * the first berval... */
+
+		ber_tag_t tag;
+		ber_len_t len = -1;
+		BerElementBuffer berbuf;
+		BerElement *ber = (BerElement *)&berbuf;
+
+		struct berval	tmpid = BER_BVNULL;
+
+		if ( op->ore_reqdata->bv_len == 0 ) {
+			return LDAP_PROTOCOL_ERROR;
+		}
+
+		/* ber_init2 uses reqdata directly, doesn't allocate new buffers */
+		ber_init2( ber, op->ore_reqdata, 0 );
+
+		tag = ber_scanf( ber, "{" /*}*/ );
+
+		if ( tag == LBER_ERROR ) {
+			return LDAP_PROTOCOL_ERROR;
+		}
+
+		tag = ber_peek_tag( ber, &len );
+		if ( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_ID ) {
+			tag = ber_get_stringbv( ber, &tmpid, LBER_BV_NOTERM );
+
+			if ( tag == LBER_ERROR ) {
+				return LDAP_PROTOCOL_ERROR;
+			}
+		}
+
+		if ( !BER_BVISEMPTY( &tmpid ) ) {
+			char idNull = tmpid.bv_val[tmpid.bv_len];
+			tmpid.bv_val[tmpid.bv_len] = '\0';
+			rs->sr_err = dnPrettyNormal( NULL, &tmpid, &dn,
+				&ndn, op->o_tmpmemctx );
+			tmpid.bv_val[tmpid.bv_len] = idNull;
+			if ( rs->sr_err != LDAP_SUCCESS ) {
+				/* should have been successfully parsed earlier! */
+				return rs->sr_err;
+			}
+			freedn = 1;
+
+		} else {
+			dn = op->o_dn;
+			ndn = op->o_ndn;
+		}
+	}
+
+	isproxy = ber_bvcmp( &ndn, &op->o_ndn );
+
+	Debug( LDAP_DEBUG_ARGS, "==> ldap_back_exop_passwd(\"%s\")%s\n",
+		dn.bv_val, isproxy ? " (proxy)" : "" );
+
+retry:
+	rc = ldap_passwd( lc->lc_ld,  &dn,
+		qpw->rs_old.bv_val ? &qpw->rs_old : NULL,
+		qpw->rs_new.bv_val ? &qpw->rs_new : NULL,
+		op->o_ctrls, NULL, &msgid );
+
+	if ( rc == LDAP_SUCCESS ) {
+		/* TODO: set timeout? */
+		/* by now, make sure no timeout is used (ITS#6282) */
+		struct timeval tv = { -1, 0 };
+		if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) == -1 ) {
+			ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER, &rc );
+			rs->sr_err = rc;
+
+		} else {
+			/* only touch when activity actually took place... */
+			if ( li->li_idle_timeout ) {
+				lc->lc_time = op->o_time;
+			}
+
+			/* sigh. parse twice, because parse_passwd
+			 * doesn't give us the err / match / msg info.
+			 */
+			rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
+					(char **)&rs->sr_matched,
+					&text,
+					NULL, &rs->sr_ctrls, 0 );
+
+			if ( rc == LDAP_SUCCESS ) {
+				if ( rs->sr_err == LDAP_SUCCESS ) {
+					struct berval	newpw;
+
+					/* this never happens because 
+					 * the frontend	is generating 
+					 * the new password, so when
+					 * the passwd exop is proxied,
+					 * it never delegates password
+					 * generation to the remote server
+					 */
+					rc = ldap_parse_passwd( lc->lc_ld, res,
+							&newpw );
+					if ( rc == LDAP_SUCCESS &&
+							!BER_BVISNULL( &newpw ) )
+					{
+						rs->sr_type = REP_EXTENDED;
+						rs->sr_rspdata = slap_passwd_return( &newpw );
+						free( newpw.bv_val );
+					}
+
+				} else {
+					rc = rs->sr_err;
+				}
+			}
+			ldap_msgfree( res );
+		}
+	}
+
+	if ( rc != LDAP_SUCCESS ) {
+		rs->sr_err = slap_map_api2result( rs );
+		if ( rs->sr_err == LDAP_UNAVAILABLE && do_retry ) {
+			do_retry = 0;
+			if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
+				goto retry;
+			}
+		}
+
+		if ( LDAP_BACK_QUARANTINE( li ) ) {
+			ldap_back_quarantine( op, rs );
+		}
+
+		if ( text ) rs->sr_text = text;
+		send_ldap_extended( op, rs );
+		/* otherwise frontend resends result */
+		rc = rs->sr_err = SLAPD_ABANDON;
+
+	} else if ( LDAP_BACK_QUARANTINE( li ) ) {
+		ldap_back_quarantine( op, rs );
+	}
+
+	ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
+	ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_EXTENDED ], 1 );
+	ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
+
+	if ( freedn ) {
+		op->o_tmpfree( dn.bv_val, op->o_tmpmemctx );
+		op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
+	}
+
+	/* these have to be freed anyway... */
+	if ( rs->sr_matched ) {
+		free( (char *)rs->sr_matched );
+		rs->sr_matched = NULL;
+	}
+
+	if ( rs->sr_ctrls ) {
+		ldap_controls_free( rs->sr_ctrls );
+		rs->sr_ctrls = NULL;
+	}
+
+	if ( text ) {
+		free( text );
+		rs->sr_text = NULL;
+	}
+
+	/* in case, cleanup handler */
+	if ( lc == NULL ) {
+		*lcp = NULL;
+	}
+
+	return rc;
+}
+
+static int
+ldap_back_exop_generic(
+	Operation	*op,
+	SlapReply	*rs,
+	ldapconn_t	**lcp )
+{
+	ldapinfo_t	*li = (ldapinfo_t *) op->o_bd->be_private;
+
+	ldapconn_t	*lc = *lcp;
+	LDAPMessage	*res;
+	ber_int_t	msgid;
+	int		rc;
+	int		do_retry = 1;
+	char		*text = NULL;
+
+	Debug( LDAP_DEBUG_ARGS, "==> ldap_back_exop_generic(%s, \"%s\")\n",
+		op->ore_reqoid.bv_val, op->o_req_dn.bv_val );
+	assert( lc != NULL );
+	assert( rs->sr_ctrls == NULL );
+
+retry:
+	rc = ldap_extended_operation( lc->lc_ld,
+		op->ore_reqoid.bv_val, op->ore_reqdata,
+		op->o_ctrls, NULL, &msgid );
+
+	if ( rc == LDAP_SUCCESS ) {
+		/* TODO: set timeout? */
+		/* by now, make sure no timeout is used (ITS#6282) */
+		struct timeval tv = { -1, 0 };
+		if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res ) == -1 ) {
+			ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER, &rc );
+			rs->sr_err = rc;
+
+		} else {
+			/* only touch when activity actually took place... */
+			if ( li->li_idle_timeout ) {
+				lc->lc_time = op->o_time;
+			}
+
+			/* sigh. parse twice, because parse_passwd
+			 * doesn't give us the err / match / msg info.
+			 */
+			rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
+					(char **)&rs->sr_matched,
+					&text,
+					NULL, &rs->sr_ctrls, 0 );
+			if ( rc == LDAP_SUCCESS ) {
+				if ( rs->sr_err == LDAP_SUCCESS ) {
+					rc = ldap_parse_extended_result( lc->lc_ld, res,
+							(char **)&rs->sr_rspoid, &rs->sr_rspdata, 0 );
+					if ( rc == LDAP_SUCCESS ) {
+						rs->sr_type = REP_EXTENDED;
+					}
+
+				} else {
+					rc = rs->sr_err;
+				}
+			}
+			ldap_msgfree( res );
+		}
+	}
+
+	if ( rc != LDAP_SUCCESS ) {
+		rs->sr_err = slap_map_api2result( rs );
+		if ( rs->sr_err == LDAP_UNAVAILABLE && do_retry ) {
+			do_retry = 0;
+			if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
+				goto retry;
+			}
+		}
+
+		if ( LDAP_BACK_QUARANTINE( li ) ) {
+			ldap_back_quarantine( op, rs );
+		}
+
+		if ( text ) rs->sr_text = text;
+		send_ldap_extended( op, rs );
+		/* otherwise frontend resends result */
+		rc = rs->sr_err = SLAPD_ABANDON;
+
+	} else if ( LDAP_BACK_QUARANTINE( li ) ) {
+		ldap_back_quarantine( op, rs );
+	}
+
+	ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
+	ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_EXTENDED ], 1 );
+	ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
+
+	/* these have to be freed anyway... */
+	if ( rs->sr_matched ) {
+		free( (char *)rs->sr_matched );
+		rs->sr_matched = NULL;
+	}
+
+	if ( rs->sr_ctrls ) {
+		ldap_controls_free( rs->sr_ctrls );
+		rs->sr_ctrls = NULL;
+	}
+
+	if ( text ) {
+		free( text );
+		rs->sr_text = NULL;
+	}
+
+	/* in case, cleanup handler */
+	if ( lc == NULL ) {
+		*lcp = NULL;
+	}
+
+	return rc;
+}