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55 lines
1.4 KiB
55 lines
1.4 KiB
4 months ago
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// Copyright 2020 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "util/base64.h"
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#include <stddef.h>
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#include "third_party/modp_b64/modp_b64.h"
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#include "util/osp_logging.h"
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#include "util/std_util.h"
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namespace openscreen {
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namespace base64 {
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std::string Encode(absl::Span<const uint8_t> input) {
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return Encode(absl::string_view(reinterpret_cast<const char*>(input.data()),
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input.size()));
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}
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std::string Encode(absl::string_view input) {
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std::string out;
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out.resize(modp_b64_encode_len(input.size()));
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const size_t output_size =
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modp_b64_encode(data(out), input.data(), input.size());
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if (output_size == MODP_B64_ERROR) {
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return {};
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}
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// The encode_len is generally larger than needed.
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out.resize(output_size);
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return out;
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}
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bool Decode(absl::string_view input, std::string* output) {
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std::string out;
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out.resize(modp_b64_decode_len(input.size()));
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// We don't null terminate the result since it is binary data.
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const size_t output_size =
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modp_b64_decode(data(out), input.data(), input.size());
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if (output_size == MODP_B64_ERROR) {
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return false;
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}
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// The output size from decode_len is generally larger than needed.
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out.resize(output_size);
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output->swap(out);
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return true;
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}
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} // namespace base64
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} // namespace openscreen
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