Update macaroon lib

Change-Id: I71f2aacbc094b3e4cbd10898d037719ac59c4015
Reviewed-on: https://weave-review.googlesource.com/2359
Reviewed-by: Vitaly Buka <vitalybuka@google.com>

third_party/libuweave/src/macaroon_caveat_internal.h

diff --git a/third_party/libuweave/src/macaroon_caveat_internal.h b/third_party/libuweave/src/macaroon_caveat_internal.h
new file mode 100644
index 0000000..46a72fb
--- /dev/null
+++ b/third_party/libuweave/src/macaroon_caveat_internal.h
@@ -0,0 +1,41 @@
+// Copyright 2015 The Weave Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef LIBUWEAVE_SRC_MACAROON_CAVEAT_INTERNAL_H_
+#define LIBUWEAVE_SRC_MACAROON_CAVEAT_INTERNAL_H_
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "src/macaroon.h"
+#include "src/macaroon_caveat.h"
+
+bool uw_macaroon_caveat_sign_(const uint8_t* key,
+                              size_t key_len,
+                              const UwMacaroonContext* context,
+                              const UwMacaroonCaveat* caveat,
+                              uint8_t* mac_tag,
+                              size_t mac_tag_size);
+
+typedef struct {
+  bool has_issued_time;
+  uint32_t issued_time;
+} UwMacaroonValidationState;
+
+bool uw_macaroon_caveat_init_validation_state_(
+    UwMacaroonValidationState* state);
+
+bool uw_macaroon_caveat_validate_(const UwMacaroonCaveat* caveat,
+                                  const UwMacaroonContext* context,
+                                  UwMacaroonValidationState* state,
+                                  UwMacaroonValidationResult* result);
+
+bool uw_macaroon_caveat_get_value_uint_(const UwMacaroonCaveat* caveat,
+                                        uint32_t* unsigned_int);
+bool uw_macaroon_caveat_get_value_bstr_(const UwMacaroonCaveat* caveat,
+                                        const uint8_t** str,
+                                        size_t* str_len);
+
+#endif  // LIBUWEAVE_SRC_MACAROON_CAVEAT_INTERNAL_H_