Update monet.

crypto/sha2.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "crypto/sha2.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/stl_util.h"
+#include "crypto/secure_hash.h"
+
+namespace crypto {
+
+void SHA256HashString(const base::StringPiece& str, void* output, size_t len) {
+  scoped_ptr<SecureHash> ctx(SecureHash::Create(SecureHash::SHA256));
+  ctx->Update(str.data(), str.length());
+  ctx->Finish(output, len);
+}
+
+std::string SHA256HashString(const base::StringPiece& str) {
+  std::string output(kSHA256Length, 0);
+  SHA256HashString(str, string_as_array(&output), output.size());
+  return output;
+}
+
+}  // namespace crypto