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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.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef TINK_STREAMINGAEAD_STREAMING_AEAD_KEY_TEMPLATES_H_
#define TINK_STREAMINGAEAD_STREAMING_AEAD_KEY_TEMPLATES_H_
#include "proto/tink.pb.h"
namespace crypto {
namespace tink {
///////////////////////////////////////////////////////////////////////////////
// Pre-generated KeyTemplate for StreamingAead key types. One can use these
// templates to generate new KeysetHandle object with fresh keys.
// To generate a new keyset that contains a single AesGcmKey, one can do:
//
// auto status = StreamingAeadConfig::Register();
// if (!status.ok()) { /* fail with error */ }
// auto handle_result = KeysetHandle::GenerateNew(
// StreamingAeadKeyTemplates::Aes128GcmHkdf4KB());
// if (!handle_result.ok()) { /* fail with error */ }
// auto keyset_handle = std::move(handle_result.value());
class StreamingAeadKeyTemplates {
public:
// Returns a KeyTemplate that generates new instances of
// AesGcmHkdfStreamingKey with the following parameters:
// - main key (ikm) size: 16 bytes
// - HKDF algorithm: HMAC-SHA256
// - size of derived AES-GCM keys: 16 bytes
// - ciphertext segment size: 4096 bytes
// - OutputPrefixType: RAW
static const google::crypto::tink::KeyTemplate& Aes128GcmHkdf4KB();
// Returns a KeyTemplate that generates new instances of
// AesGcmHkdfStreamingKey with the following parameters:
// - main key (ikm) size: 32 bytes
// - HKDF algorithm: HMAC-SHA256
// - size of derived AES-GCM keys: 32 bytes
// - ciphertext segment size: 4096 bytes
// - OutputPrefixType: RAW
static const google::crypto::tink::KeyTemplate& Aes256GcmHkdf4KB();
// Returns a KeyTemplate that generates new instances of
// AesGcmHkdfStreamingKey with the following parameters:
// - main key (ikm) size: 32 bytes
// - HKDF algorithm: HMAC-SHA256
// - size of derived AES-GCM keys: 32 bytes
// - ciphertext segment size: 1048576 bytes (1 MB)
// - OutputPrefixType: RAW
static const google::crypto::tink::KeyTemplate& Aes256GcmHkdf1MB();
// Returns a KeyTemplate that generates new instances of
// AesCtrHmacStreamingKey with the following parameters:
// - main key (ikm) size: 16 bytes
// - HKDF algorithm: HMAC-SHA256
// - size of derived AES-CTR keys: 16 bytes
// - tag algorithm: HMAC-SHA256
// - tag size: 32 bytes
// - ciphertext segment size: 4096 bytes
// - OutputPrefixType: RAW
static const google::crypto::tink::KeyTemplate&
Aes128CtrHmacSha256Segment4KB();
// Returns a KeyTemplate that generates new instances of
// AesCtrHmacStreamingKey with the following parameters:
// - main key (ikm) size: 16 bytes
// - HKDF algorithm: HMAC-SHA256
// - size of derived AES-CTR keys: 16 bytes
// - tag algorithm: HMAC-SHA256
// - tag size: 32 bytes
// - ciphertext segment size: 1048576 bytes (1 MB)
// - OutputPrefixType: RAW
static const google::crypto::tink::KeyTemplate&
Aes128CtrHmacSha256Segment1MB();
// Returns a KeyTemplate that generates new instances of
// AesCtrHmacStreamingKey with the following parameters:
// - main key (ikm) size: 32 bytes
// - HKDF algorithm: HMAC-SHA256
// - size of derived AES-CTR keys: 32 bytes
// - tag algorithm: HMAC-SHA256
// - tag size: 32 bytes
// - ciphertext segment size: 4096 bytes
// - OutputPrefixType: RAW
static const google::crypto::tink::KeyTemplate&
Aes256CtrHmacSha256Segment4KB();
// Returns a KeyTemplate that generates new instances of
// AesCtrHmacStreamingKey with the following parameters:
// - main key (ikm) size: 32 bytes
// - HKDF algorithm: HMAC-SHA256
// - size of derived AES-CTR keys: 32 bytes
// - tag algorithm: HMAC-SHA256
// - tag size: 32 bytes
// - ciphertext segment size: 1048576 bytes (1 MB)
// - OutputPrefixType: RAW
static const google::crypto::tink::KeyTemplate&
Aes256CtrHmacSha256Segment1MB();
};
} // namespace tink
} // namespace crypto
#endif // TINK_STREAMINGAEAD_STREAMING_AEAD_KEY_TEMPLATES_H_
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