nearby sdk refactor

PiperOrigin-RevId: 425434260

internal/platform/implementation/crypto.h

@@ -0,0 +1,38 @@
+// Copyright 2020 Google LLC
+//
+// 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
+//
+//     https://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 PLATFORM_API_CRYPTO_H_
+#define PLATFORM_API_CRYPTO_H_
+
+#include "absl/strings/string_view.h"
+#include "internal/platform/byte_array.h"
+
+namespace location {
+namespace nearby {
+
+// A provider of standard hashing algorithms.
+class Crypto {
+ public:
+  // Initialize global crypto state.
+  static void Init();
+  // Return MD5 hash of input.
+  static ByteArray Md5(absl::string_view input);
+  // Return SHA256 hash of input.
+  static ByteArray Sha256(absl::string_view input);
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_API_CRYPTO_H_