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// Copyright 2019 Google Inc.
//
// 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
//
// http://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.
//
///////////////////////////////////////////////////////////////////////////////
#include "tink/subtle/nonce_based_streaming_aead.h"
#include <memory>
#include <utility>
#include "absl/strings/string_view.h"
#include "tink/input_stream.h"
#include "tink/output_stream.h"
#include "tink/random_access_stream.h"
#include "tink/streaming_aead.h"
#include "tink/subtle/decrypting_random_access_stream.h"
#include "tink/subtle/stream_segment_decrypter.h"
#include "tink/subtle/stream_segment_encrypter.h"
#include "tink/subtle/streaming_aead_decrypting_stream.h"
#include "tink/subtle/streaming_aead_encrypting_stream.h"
#include "tink/util/statusor.h"
namespace crypto {
namespace tink {
namespace subtle {
crypto::tink::util::StatusOr<std::unique_ptr<crypto::tink::OutputStream>>
NonceBasedStreamingAead::NewEncryptingStream(
std::unique_ptr<crypto::tink::OutputStream> ciphertext_destination,
absl::string_view associated_data) const {
auto segment_encrypter_result = NewSegmentEncrypter(associated_data);
if (!segment_encrypter_result.ok()) return segment_encrypter_result.status();
return StreamingAeadEncryptingStream::New(
std::move(segment_encrypter_result.value()),
std::move(ciphertext_destination));
}
crypto::tink::util::StatusOr<std::unique_ptr<crypto::tink::InputStream>>
NonceBasedStreamingAead::NewDecryptingStream(
std::unique_ptr<crypto::tink::InputStream> ciphertext_source,
absl::string_view associated_data) const {
auto segment_decrypter_result = NewSegmentDecrypter(associated_data);
if (!segment_decrypter_result.ok()) return segment_decrypter_result.status();
return StreamingAeadDecryptingStream::New(
std::move(segment_decrypter_result.value()),
std::move(ciphertext_source));
}
crypto::tink::util::StatusOr<std::unique_ptr<crypto::tink::RandomAccessStream>>
NonceBasedStreamingAead::NewDecryptingRandomAccessStream(
std::unique_ptr<crypto::tink::RandomAccessStream> ciphertext_source,
absl::string_view associated_data) const {
auto segment_decrypter_result = NewSegmentDecrypter(associated_data);
if (!segment_decrypter_result.ok()) return segment_decrypter_result.status();
return DecryptingRandomAccessStream::New(
std::move(segment_decrypter_result.value()),
std::move(ciphertext_source));
}
} // namespace subtle
} // namespace tink
} // namespace crypto
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