System.DirectoryServices.Protocols: Force using LDAP V3 for SASL binding

Fixes #109449
dotnet · Nov 1, 2024 · 35100d4 · 35100d4
1 parent 275ea58
commit 35100d4
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/...oryServices.Protocols/src/System/DirectoryServices/Protocols/ldap/LdapConnection.Linux.cs b/...oryServices.Protocols/src/System/DirectoryServices/Protocols/ldap/LdapConnection.Linux.cs
@@ -127,6 +127,8 @@ private int BindSasl()
             Marshal.StructureToPtr(defaults, ptrToDefaults, false);
             try
             {
+                // Bump up the protocol version because ldap_sasl_interactive_bind requires LDAP V3 else it returns LDAP_NOT_SUPPORTED and this ends up throwing LdapException: The feature is not supported.
+                SessionOptions.ProtocolVersion = 3;
                 return Interop.Ldap.ldap_sasl_interactive_bind(_ldapHandle, null, Interop.KerberosDefaultMechanism, IntPtr.Zero, IntPtr.Zero, Interop.LDAP_SASL_QUIET, LdapPal.SaslInteractionProcedure, ptrToDefaults);
             }
             finally