From 5f19d13dfed35d8d4ed80d555f2d32b106771b61 Mon Sep 17 00:00:00 2001 From: Peter Eisentraut Date: Tue, 12 Aug 2025 20:52:32 +0200 Subject: libpq: Set LDAP protocol version 3 Some LDAP servers reject the default version 2 protocol. So set version 3 before starting the connection. This matches how the backend LDAP code has worked all along. Co-authored-by: Andrew Jackson Reviewed-by: Pavel Seleznev Discussion: https://www.postgresql.org/message-id/flat/CAKK5BkHixcivSCA9pfd_eUp7wkLRhvQ6OtGLAYrWC%3Dk7E76LDQ%40mail.gmail.com --- src/interfaces/libpq/fe-connect.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'src') diff --git a/src/interfaces/libpq/fe-connect.c b/src/interfaces/libpq/fe-connect.c index afa85d9fca9..a3d12931fff 100644 --- a/src/interfaces/libpq/fe-connect.c +++ b/src/interfaces/libpq/fe-connect.c @@ -5494,6 +5494,7 @@ ldapServiceLookup(const char *purl, PQconninfoOption *options, *entry; struct berval **values; LDAP_TIMEVAL time = {PGLDAP_TIMEOUT, 0}; + int ldapversion = LDAP_VERSION3; if ((url = strdup(purl)) == NULL) { @@ -5625,6 +5626,15 @@ ldapServiceLookup(const char *purl, PQconninfoOption *options, return 3; } + if ((rc = ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &ldapversion)) != LDAP_SUCCESS) + { + libpq_append_error(errorMessage, "could not set LDAP protocol version: %s", + ldap_err2string(rc)); + free(url); + ldap_unbind(ld); + return 3; + } + /* * Perform an explicit anonymous bind. * -- cgit v1.2.3