libsodium: don't use the stack for potentially large data (#5190)

* libsodium: don't use the stack for potentially large data

Also check return codes of verification functions, and properly
check the random implementation name.

* Add license headers

1 files changed, 15 insertions, 1 deletions

diff --git a/projects/libsodium/fake_random.h b/projects/libsodium/fake_random.h
index 36d8d89b..9519b0ce 100644
--- a/projects/libsodium/fake_random.h
+++ b/projects/libsodium/fake_random.h
@@ -1,3 +1,17 @@
+// Copyright 2018 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #ifndef FAKE_RANDOM_H_
 #define FAKE_RANDOM_H_
 
@@ -43,7 +57,7 @@ setup_fake_random(const unsigned char * seed, const size_t seed_size) {
   int fake_random_set = randombytes_set_implementation(&fake_random);
   assert(fake_random_set == 0);
 
-  assert(randombytes_implementation_name() == "fake_random");
+  assert(strcmp(randombytes_implementation_name(), "fake_random") == 0);
   int initialized = sodium_init();
   assert(initialized >= 0);
 }