lib-sasl: sasl-server-mech-gssapi - Allow krb5_keytab setting to be NULL

diff --git a/src/lib-sasl/sasl-server-mech-gssapi.c b/src/lib-sasl/sasl-server-mech-gssapi.c
index 728c62bbffa208d2c4ed0d72c5c9124d56540978..105b0b847234ed6a0ff64a2a5153afb33a315813 100644 (file)
--- a/src/lib-sasl/sasl-server-mech-gssapi.c
+++ b/src/lib-sasl/sasl-server-mech-gssapi.c
@@ -719,7 +719,7 @@ mech_gssapi_register(struct sasl_server_instance *sinst,
 
        const char *path = set->krb5_keytab;
 
-       if (*path != '\0') {
+       if (path != NULL && *path != '\0') {
                /* Environment may be used by Kerberos 5 library directly */
                env_put("KRB5_KTNAME", path);
 #ifdef HAVE_GSSKRB5_REGISTER_ACCEPTOR_IDENTITY