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- // 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 "base/base64.h"
- #include <stddef.h>
- #include "third_party/modp_b64/modp_b64.h"
- namespace base {
- std::string Base64Encode(span<const uint8_t> input) {
- std::string output;
- output.resize(modp_b64_encode_len(input.size())); // makes room for null byte
- // modp_b64_encode_len() returns at least 1, so output[0] is safe to use.
- const size_t output_size = modp_b64_encode(
- &(output[0]), reinterpret_cast<const char*>(input.data()), input.size());
- output.resize(output_size);
- return output;
- }
- void Base64Encode(StringPiece input, std::string* output) {
- *output = Base64Encode(base::as_bytes(base::make_span(input)));
- }
- bool Base64Decode(StringPiece input, std::string* output) {
- std::string temp;
- temp.resize(modp_b64_decode_len(input.size()));
- // does not null terminate result since result is binary data!
- size_t input_size = input.size();
- size_t output_size = modp_b64_decode(&(temp[0]), input.data(), input_size);
- if (output_size == MODP_B64_ERROR)
- return false;
- temp.resize(output_size);
- output->swap(temp);
- return true;
- }
- absl::optional<std::vector<uint8_t>> Base64Decode(StringPiece input) {
- std::vector<uint8_t> ret(modp_b64_decode_len(input.size()));
- size_t input_size = input.size();
- size_t output_size = modp_b64_decode(reinterpret_cast<char*>(ret.data()),
- input.data(), input_size);
- if (output_size == MODP_B64_ERROR)
- return absl::nullopt;
- ret.resize(output_size);
- return ret;
- }
- } // namespace base
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