text: // 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.
  //
  ////////////////////////////////////////////////////////////////////////////////
  
  goog.module('tink.Aead');
  
  /**
   * Interface for Authenticated Encryption with Associated Data (AEAD).
   *
   * Security guarantees: Implementations of this interface are secure against
   * adaptive chosen ciphertext attacks. Encryption with associated data ensures
   * authenticity (who the sender is) and integrity (the data has not been
   * tampered with) of that data, but not its secrecy.
   *
   * @see https://tools.ietf.org/html/rfc5116
   * @record
   */
  class Aead {
    /**
     * Encrypts `plaintext` with `opt_associatedData` as associated authenticated
     * data. The resulting ciphertext allows for checking authenticity and
     * integrity of associated data, but does not guarantee its secrecy.
     *
     * @param {!Uint8Array} plaintext the plaintext to be encrypted. It must be
     *     non-null, but can also be an empty (zero-length) byte array.
     * @param {?Uint8Array=} opt_associatedData  optional associated data to be
     *     authenticated, but not encrypted. A null value is equivalent to an
     *     empty (zero-length) byte array. For successful decryption the same
     *     associated data must be provided along with the ciphertext.
     * @return {!Promise.<!Uint8Array>} resulting ciphertext
     *
     */
    encrypt(plaintext, opt_associatedData) {}
  
    /**
     * Decrypts ciphertext with associated authenticated data.
     * The decryption verifies the authenticity and integrity of the associated
     * data, but there are no guarantees wrt. secrecy of that data.
     *
     * @param {!Uint8Array} ciphertext the ciphertext to be decrypted, must be
     *     non-null.
     * @param {?Uint8Array=} opt_associatedData  optional associated data to be
     *     authenticated. A null value is equivalent to an empty (zero-length)
     *     byte array. For successful decryption the same associated data must be
     *     provided along with the ciphertext.
     * @return {!Promise.<!Uint8Array>} resulting plaintext
     */
    decrypt(ciphertext, opt_associatedData) {}
  }
  
  exports = Aead;
  