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dirmngr: Try ldap protocol V3 as fallback

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* dirmngr/dirmngr_ldap.c (fetch_ldap): Try V3 Protocol in case
default Protocol gives error.

--
Servers may have blocked V2 Protocol, in which case the
bind will result in a Protocol Error. In that case we try
again with v3 Protocol if the ldap libarary used to compile
dirmngr supports V3.

Signed-off-by: Andre Heinecke <aheinecke@intevation.de>
This commit is contained in:
Andre Heinecke 2016-06-14 19:22:52 +02:00 committed by Werner Koch
parent 5faddcb292
commit f989b6ee0d
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GPG Key ID: E3FDFF218E45B72B
1 changed files with 12 additions and 0 deletions
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12
dirmngr/dirmngr_ldap.c
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@ -641,6 +641,18 @@ fetch_ldap (my_opt_t myopt, const char *url, const LDAPURLDesc *ludp)
/* Fixme: Can we use MYOPT->user or is it shared with other theeads?. */ /* Fixme: Can we use MYOPT->user or is it shared with other theeads?. */
ret = my_ldap_simple_bind_s (ld, myopt->user, myopt->pass); ret = my_ldap_simple_bind_s (ld, myopt->user, myopt->pass);
npth_protect (); npth_protect ();
#ifdef LDAP_VERSION3
if (ret == LDAP_PROTOCOL_ERROR)
{
int version = LDAP_VERSION3;
/* Protocol error could mean that the server only supports v3 */
npth_unprotect ();
log_debug ("Protocol error, retrying bind with V3 Protocol. \n");
ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &version);
ret = my_ldap_simple_bind_s (ld, myopt->user, myopt->pass);
npth_protect ();
}
#endif
if (ret) if (ret)
{ {
log_error (_("binding to '%s:%d' failed: %s\n"), log_error (_("binding to '%s:%d' failed: %s\n"),