diff options
Diffstat (limited to 'source4')
| -rw-r--r-- | source4/rpc_server/dcerpc_server.c | 13 | ||||
| -rw-r--r-- | source4/rpc_server/dcesrv_auth.c | 7 |
2 files changed, 14 insertions, 6 deletions
diff --git a/source4/rpc_server/dcerpc_server.c b/source4/rpc_server/dcerpc_server.c index a336ddb339..fa7b8d26f5 100644 --- a/source4/rpc_server/dcerpc_server.c +++ b/source4/rpc_server/dcerpc_server.c @@ -917,6 +917,7 @@ _PUBLIC_ NTSTATUS dcesrv_reply(struct dcesrv_call_state *call) DATA_BLOB stub; uint32_t total_length, chunk_size; struct dcesrv_connection_context *context = call->context; + size_t sig_size = 0; /* call the reply function */ status = context->iface->reply(call, call, call->r); @@ -948,7 +949,15 @@ _PUBLIC_ NTSTATUS dcesrv_reply(struct dcesrv_call_state *call) /* we can write a full max_recv_frag size, minus the dcerpc request header size */ - chunk_size = call->conn->cli_max_recv_frag - (DCERPC_MAX_SIGN_SIZE+DCERPC_REQUEST_LENGTH); + chunk_size = call->conn->cli_max_recv_frag; + chunk_size -= DCERPC_REQUEST_LENGTH; + if (call->conn->auth_state.gensec_security) { + chunk_size -= DCERPC_AUTH_TRAILER_LENGTH; + sig_size = gensec_sig_size(call->conn->auth_state.gensec_security, + call->conn->cli_max_recv_frag); + chunk_size -= sig_size; + chunk_size -= (chunk_size % 16); + } do { uint32_t length; @@ -978,7 +987,7 @@ _PUBLIC_ NTSTATUS dcesrv_reply(struct dcesrv_call_state *call) pkt.u.response.stub_and_verifier.data = stub.data; pkt.u.response.stub_and_verifier.length = length; - if (!dcesrv_auth_response(call, &rep->blob, &pkt)) { + if (!dcesrv_auth_response(call, &rep->blob, sig_size, &pkt)) { return dcesrv_fault(call, DCERPC_FAULT_OTHER); } diff --git a/source4/rpc_server/dcesrv_auth.c b/source4/rpc_server/dcesrv_auth.c index 64f42eea25..0aad3775d0 100644 --- a/source4/rpc_server/dcesrv_auth.c +++ b/source4/rpc_server/dcesrv_auth.c @@ -398,7 +398,8 @@ bool dcesrv_auth_request(struct dcesrv_call_state *call, DATA_BLOB *full_packet) push a signed or sealed dcerpc request packet into a blob */ bool dcesrv_auth_response(struct dcesrv_call_state *call, - DATA_BLOB *blob, struct ncacn_packet *pkt) + DATA_BLOB *blob, size_t sig_size, + struct ncacn_packet *pkt) { struct dcesrv_connection *dce_conn = call->conn; NTSTATUS status; @@ -445,9 +446,7 @@ bool dcesrv_auth_response(struct dcesrv_call_state *call, * GENSEC mech does AEAD signing of the packet * headers */ dce_conn->auth_state.auth_info->credentials - = data_blob_talloc(call, NULL, - gensec_sig_size(dce_conn->auth_state.gensec_security, - payload_length)); + = data_blob_talloc(call, NULL, sig_size); data_blob_clear(&dce_conn->auth_state.auth_info->credentials); } |