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// Copyright 2020 The Tink-Rust Authors
//
// 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.
//
////////////////////////////////////////////////////////////////////////////////

//! This module contains pre-generated [`KeyTemplate`] instances for deterministic AEAD.

use tink_proto::{prost::Message, KeyTemplate};

/// Return a [`KeyTemplate`](tink_proto::KeyTemplate) that generates a AES-SIV key.
pub fn aes_siv_key_template() -> KeyTemplate {
    let format = tink_proto::AesSivKeyFormat {
        key_size: 64,
        version: crate::AES_SIV_KEY_VERSION,
    };
    let mut serialized_format = Vec::new();
    format.encode(&mut serialized_format).unwrap(); // safe: proto-encode
    KeyTemplate {
        type_url: crate::AES_SIV_TYPE_URL.to_string(),
        output_prefix_type: tink_proto::OutputPrefixType::Tink as i32,
        value: serialized_format,
    }
}