Copy AEADSecretKeyEncryptorBuilder from 1857 branch

Author: gefeili

pg/src/main/java/org/bouncycastle/openpgp/operator/AEADSecretKeyEncryptorBuilder.java

@@ -0,0 +1,21 @@
+package org.bouncycastle.openpgp.operator;
+
+import org.bouncycastle.bcpg.PublicKeyPacket;
+
+/**
+ * Implementation provider for AEAD-based {@link PBESecretKeyEncryptor PBESecretKeyEncryptors}.
+ */
+public interface AEADSecretKeyEncryptorBuilder
+{
+    /**
+     * Build a new {@link PBESecretKeyEncryptor} using the given passphrase.
+     * Note: As the AEAD protection mechanism includes the public key packet of the key into the calculation,
+     * if the key you want to protect is supposed to be a subkey, you need to convert it to one <b>before</b>
+     * calling this method. See {@link org.bouncycastle.openpgp.PGPKeyPair#asSubkey(KeyFingerPrintCalculator)}.
+     *
+     * @param passphrase passphrase
+     * @param pubKey public primary or subkey packet
+     * @return encryptor using AEAD
+     */
+    PBESecretKeyEncryptor build(char[] passphrase, PublicKeyPacket pubKey);
+}

pg/src/main/java/org/bouncycastle/openpgp/operator/bc/BcAEADSecretKeyEncryptorBuilder.java

@@ -8,9 +8,11 @@
 import org.bouncycastle.bcpg.PublicKeyPacket;
 import org.bouncycastle.bcpg.S2K;
 import org.bouncycastle.openpgp.PGPException;
+import org.bouncycastle.openpgp.operator.AEADSecretKeyEncryptorBuilder;
 import org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor;
 
 public class BcAEADSecretKeyEncryptorBuilder
+    implements AEADSecretKeyEncryptorBuilder
 {
 
     private int aeadAlgorithm;

pg/src/main/java/org/bouncycastle/openpgp/operator/jcajce/JcaAEADSecretKeyEncryptorBuilder.java

@@ -13,9 +13,11 @@
 import org.bouncycastle.jcajce.util.NamedJcaJceHelper;
 import org.bouncycastle.jcajce.util.ProviderJcaJceHelper;
 import org.bouncycastle.openpgp.PGPException;
+import org.bouncycastle.openpgp.operator.AEADSecretKeyEncryptorBuilder;
 import org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor;
 
 public class JcaAEADSecretKeyEncryptorBuilder
+    implements AEADSecretKeyEncryptorBuilder
 {
     private int aeadAlgorithm;
     private int symmetricAlgorithm;