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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.security.hpke;
/**
* Authenticated encryption with associated data (AEAD)
*
* @author vekterli
*/
public interface Aead {
/**
* @param key Symmetric key bytes for encryption
* @param nonce Nonce to use for the encryption
* @param aad Associated authenticated data that will <em>not</em> be encrypted
* @param pt Plaintext to seal
* @return resulting ciphertext
*/
byte[] seal(byte[] key, byte[] nonce, byte[] aad, byte[] pt);
/**
* @param key Symmetric key bytes for decryption
* @param nonce Nonce to use for the decryption
* @param aad Associated authenticated data to verify
* @param ct ciphertext to decrypt
* @return resulting plaintext
*/
byte[] open(byte[] key, byte[] nonce, byte[] aad, byte[] ct);
/** The length in bytes of a key for this algorithm. */
short nK();
/** The length in bytes of a nonce for this algorithm. */
short nN();
/** The length in bytes of the authentication tag for this algorithm. */
short nT();
/** Predefined AEAD ID, as given in RFC 9180 section 7.3 */
short aeadId();
static Aead aes128Gcm() {
return Aes128Gcm.getInstance();
}
}
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