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-rw-r--r--source3/librpc/rpc/dcerpc_helpers.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/source3/librpc/rpc/dcerpc_helpers.c b/source3/librpc/rpc/dcerpc_helpers.c
index a94f6c88fa..f45ee941c1 100644
--- a/source3/librpc/rpc/dcerpc_helpers.c
+++ b/source3/librpc/rpc/dcerpc_helpers.c
@@ -266,6 +266,7 @@ NTSTATUS dcerpc_guess_sizes(struct pipe_auth_data *auth,
{
size_t max_len;
size_t mod_len;
+ struct schannel_state *schannel_auth;
struct spnego_context *spnego_ctx;
struct gse_context *gse_ctx;
enum spnego_mech auth_type;
@@ -336,7 +337,9 @@ NTSTATUS dcerpc_guess_sizes(struct pipe_auth_data *auth,
break;
case DCERPC_AUTH_TYPE_SCHANNEL:
- *auth_len = NL_AUTH_SIGNATURE_SIZE;
+ schannel_auth = talloc_get_type_abort(auth->auth_ctx,
+ struct schannel_state);
+ *auth_len = netsec_outgoing_sig_size(schannel_auth);
break;
case DCERPC_AUTH_TYPE_KRB5: