cc/subtle/streaming_aead_test_util.h

// 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.
//
////////////////////////////////////////////////////////////////////////////////

#ifndef TINK_SUBTLE_STREAMING_AEAD_TEST_UTIL_H_
#define TINK_SUBTLE_STREAMING_AEAD_TEST_UTIL_H_

#include "absl/strings/string_view.h"
#include "tink/streaming_aead.h"
#include "tink/util/status.h"

namespace crypto {
namespace tink {

// Encrypt with NewEncryptingStream, then decrypt using NewDecryptingStream,
// and NewDecryptingRandomAccessStream (for a few fragments).
// 'ciphertext_offset' is the offset of the actual ciphertext in the
// computed ciphertext stream (cf. description of StreamSegmentEncrypter
// in stream_segment_encrypter.h).
// Any error will be propagated to the caller. Returns OK if the resulting
// decryptions are equal to the plaintext.
crypto::tink::util::Status EncryptThenDecrypt(StreamingAead* encrypter,
                                              StreamingAead* decrypter,
                                              absl::string_view plaintext,
                                              absl::string_view associated_data,
                                              int ciphertext_offset);

}  // namespace tink
}  // namespace crypto

#endif  // TINK_SUBTLE_STREAMING_AEAD_TEST_UTIL_H_