Google Cloud Storage C++ Client  1.32.1
A C++ Client Library for Google Cloud Storage
hashing_options.cc
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1 // Copyright 2018 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #include "google/cloud/storage/hashing_options.h"
16 #include "google/cloud/storage/internal/openssl_util.h"
17 #include "google/cloud/internal/big_endian.h"
18 #include <crc32c/crc32c.h>
19 
20 namespace google {
21 namespace cloud {
22 namespace storage {
23 inline namespace STORAGE_CLIENT_NS {
24 
25 std::string ComputeMD5Hash(std::string const& payload) {
26  return internal::Base64Encode(internal::MD5Hash(payload));
27 }
28 
29 std::string ComputeCrc32cChecksum(std::string const& payload) {
30  auto checksum = crc32c::Extend(
31  0, reinterpret_cast<std::uint8_t const*>(payload.data()), payload.size());
32  std::string const hash = google::cloud::internal::EncodeBigEndian(checksum);
33  return internal::Base64Encode(hash);
34 }
35 
36 } // namespace STORAGE_CLIENT_NS
37 } // namespace storage
38 } // namespace cloud
39 } // namespace google