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Add example for unlocking secret keys
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/*
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* Copyright 2021 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.pgpainless.example;
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import java.io.IOException;
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import org.bouncycastle.openpgp.PGPException;
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import org.bouncycastle.openpgp.PGPSecretKey;
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import org.bouncycastle.openpgp.PGPSecretKeyRing;
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import org.junit.jupiter.api.Test;
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import org.pgpainless.PGPainless;
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import org.pgpainless.exception.WrongPassphraseException;
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import org.pgpainless.key.OpenPgpV4Fingerprint;
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import org.pgpainless.key.TestKeys;
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import org.pgpainless.key.protection.CachingSecretKeyRingProtector;
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import org.pgpainless.key.protection.SecretKeyRingProtector;
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import org.pgpainless.key.protection.UnlockSecretKey;
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import org.pgpainless.util.Passphrase;
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/**
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* {@link PGPSecretKey PGPSecretKeys} are often password protected to prevent unauthorized access.
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* To perform certain actions with secret keys, such as creating signatures or decrypting encrypted messages,
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* the secret key needs to be unlocked to access the underlying {@link org.bouncycastle.openpgp.PGPPrivateKey}.
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*
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* Providing the required {@link org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor}/{@link org.bouncycastle.openpgp.operator.PBESecretKeyDecryptor}
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* is a task that needs to be performed by the {@link SecretKeyRingProtector}.
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* There are different implementations available that implement this interface.
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*
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* Below are some examples of how to use these implementations in different scenarios.
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*/
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public class UnlockSecretKeys {
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/**
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* This example demonstrates how to create a {@link SecretKeyRingProtector} for unprotected secret keys.
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*
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* @throws PGPException
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* @throws IOException
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*/
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@Test
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public void unlockUnprotectedKeys() throws PGPException, IOException {
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PGPSecretKeyRing unprotectedKey = TestKeys.getJulietSecretKeyRing();
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// This protector will only unlock unprotected keys
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SecretKeyRingProtector protector = SecretKeyRingProtector.unprotectedKeys();
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assertProtectorUnlocksAllSecretKeys(unprotectedKey, protector);
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}
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/**
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* This example demonstrates how to create a {@link SecretKeyRingProtector} using a single passphrase to unlock
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* all secret subkeys of a key.
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*
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* @throws PGPException
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* @throws IOException
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*/
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@Test
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public void unlockWholeKeyWithSamePassphrase() throws PGPException, IOException {
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PGPSecretKeyRing secretKey = TestKeys.getCryptieSecretKeyRing();
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// Unlock all subkeys in the secret key with the same passphrase
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SecretKeyRingProtector protector = SecretKeyRingProtector.unlockAllKeysWith(
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Passphrase.fromPassword(TestKeys.CRYPTIE_PASSWORD), secretKey);
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assertProtectorUnlocksAllSecretKeys(secretKey, protector);
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}
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/**
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* This example demonstrates how to create a {@link SecretKeyRingProtector} that uses different
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* passphrases per subkey to unlock the secret keys.
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*
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* @throws PGPException
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* @throws IOException
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*/
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@Test
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public void unlockWithPerSubkeyPassphrases() throws PGPException, IOException {
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String pgpPrivateKeyBlock = "" +
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"-----BEGIN PGP PRIVATE KEY BLOCK-----\n" +
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"Version: PGPainless\n" +
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"Comment: 4F28 5D16 A201 21BB 5B89 E76E 5D71 171E 059A 1D2F\n" +
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"Comment: alice@pgpainless.org\n" +
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"\n" +
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"lIYEYNc8xhYJKwYBBAHaRw8BAQdAQiDSNqkU4b4TmdacOxi9mfw06pI23NNiTj/C\n" +
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"K1P+Q0/+CQMCm+6zb2ORC8BgHltvucr4KKx7QZdO5jIDWDZe1DjeS2JsJXoqOMeK\n" +
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"yjxB8aVoSZTmsAm1KMbeDWcqtsltgm+DipRUyWFxeYOoj+CugJ42GbQUYWxpY2VA\n" +
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"cGdwYWlubGVzcy5vcmeIeAQTFgoAIAUCYNc8xgIbAQUWAgMBAAQLCQgHBRUKCQgL\n" +
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"Ah4BAhkBAAoJEF1xFx4Fmh0viTEBAJmfpCJsVi7BzMh2iP6ecWZSRYtgqAhKjGTT\n" +
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"4i9IKgIUAP47SbJr4qexi3jWj9W9ng//+CKEQ857Up6iSR6u+3poApyLBGDXPMYS\n" +
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"CisGAQQBl1UBBQEBB0BUfOJMRcgWdPeyEz2kL79JfhckuDRAwZJyGd8mcFBofQMB\n" +
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"CAf+CQMCKdEpNMEpflBguXamH33Vhx2tr3iYleiWI0VfhPrQledNzJ1uCHFH5q+k\n" +
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"UnALeSCLJXIekPl3q1ux9C2MQkD/X4+mHh+fE4gSd1G5nd3oh4h1BBgWCgAdBQJg\n" +
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"1zzGAhsMBRYCAwEABAsJCAcFFQoJCAsCHgEACgkQXXEXHgWaHS/8DgD/Qnpe5g6C\n" +
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"WHeXvgg06PJR7HRPkpE5NSnqEWP9X0tPe2EBAIdTiDozZ7HL6NVI89MnLBkw+524\n" +
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"y5YzlNpQn4Al3tMCnIYEYNc8xhYJKwYBBAHaRw8BAQdAXdTUv2F0XGfi4qFnIPrL\n" +
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"YbOpEZIWYjGVf5Ggbs9OBrb+CQMClCGIqeO7yJlgR9z490pJUD4al/ATofqGPPqx\n" +
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"VsTz4gl1IkkWKQn7GJv2AYn09jZgnWm2a7u16cS6HZLJjRl2XvMzMQp3dRsOPHTP\n" +
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"nulJ7YjVBBgWCgB9BQJg1zzGAhsCBRYCAwEABAsJCAcFFQoJCAsCHgFfIAQZFgoA\n" +
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"BgUCYNc8xgAKCRD2BAJwjnXZQQLiAQCJGx9PF5ywwE93nMu8nZrhgDtl/eiCsryM\n" +
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"qjDfY5XyCgEAim9m50QU9I9gAzBgLeH2NSJhlHYZZ2LKsRE02tGvXQMACgkQXXEX\n" +
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"HgWaHS806AD+KUmSoKja11wJqCMVhYSU2IMGdGYEwa7Dqpbhyzu/LtAA/jmF10Ss\n" +
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"UPPI6jsYqxEHzRGex8t971atnDAjvDiS31YN\n" +
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"=fTmB\n" +
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"-----END PGP PRIVATE KEY BLOCK-----";
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PGPSecretKeyRing secretKey = PGPainless.readKeyRing().secretKeyRing(pgpPrivateKeyBlock);
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CachingSecretKeyRingProtector protector = SecretKeyRingProtector.defaultSecretKeyRingProtector(null);
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// Add passphrases for subkeys via public key
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protector.addPassphrase(secretKey.getPublicKey(),
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Passphrase.fromPassword("pr1maryK3y"));
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// or via subkey-id
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protector.addPassphrase(3907509425258753406L,
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Passphrase.fromPassword("f1rs7subk3y"));
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// or via fingerprint
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protector.addPassphrase(new OpenPgpV4Fingerprint("DD8E1195E4B1720E7FB10EF7F60402708E75D941"),
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Passphrase.fromPassword("s3c0ndsubk3y"));
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assertProtectorUnlocksAllSecretKeys(secretKey, protector);
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}
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private void assertProtectorUnlocksAllSecretKeys(PGPSecretKeyRing secretKey, SecretKeyRingProtector protector)
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throws WrongPassphraseException {
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for (PGPSecretKey key : secretKey) {
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UnlockSecretKey.unlockSecretKey(key, protector);
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}
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}
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}
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