1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "common/libs/utils/base64.h"
18
19 #include <cstddef>
20 #include <cstdint>
21 #include <string>
22 #include <vector>
23
24 #include <openssl/base64.h>
25
26 namespace cuttlefish {
27
EncodeBase64(const void * data,std::size_t size,std::string * out)28 bool EncodeBase64(const void *data, std::size_t size, std::string *out) {
29 std::size_t max_length = 0;
30 if (EVP_EncodedLength(&max_length, size) == 0) {
31 return false;
32 }
33
34 out->resize(max_length);
35 auto enc_res =
36 EVP_EncodeBlock(reinterpret_cast<std::uint8_t *>(out->data()),
37 reinterpret_cast<const std::uint8_t *>(data), size);
38 if (enc_res < 0) {
39 return false;
40 }
41 out->resize(enc_res); // Don't count the terminating \0 character
42 return true;
43 }
44
DecodeBase64(const std::string & data,std::vector<std::uint8_t> * buffer)45 bool DecodeBase64(const std::string &data, std::vector<std::uint8_t> *buffer) {
46 buffer->resize(data.size());
47 std::size_t actual_len = 0;
48 int success = EVP_DecodeBase64(buffer->data(), &actual_len, buffer->size(),
49 reinterpret_cast<const uint8_t *>(data.data()),
50 data.size());
51 if (success != 1) {
52 return false;
53 }
54 buffer->resize(actual_len);
55
56 return true;
57 }
58
59 } // namespace cuttlefish
60