mirror of
https://github.com/pgpainless/pgpainless.git
synced 2024-11-01 01:55:59 +01:00
Add examples for encryption and decryption of messages
This commit is contained in:
parent
9b34664ba2
commit
f6ffc4c28d
1 changed files with 147 additions and 0 deletions
|
@ -0,0 +1,147 @@
|
||||||
|
/*
|
||||||
|
* Copyright 2021 Paul Schaub.
|
||||||
|
*
|
||||||
|
* 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.
|
||||||
|
*/
|
||||||
|
package org.pgpainless.example;
|
||||||
|
|
||||||
|
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||||
|
import static org.junit.jupiter.api.Assertions.assertTrue;
|
||||||
|
|
||||||
|
import java.io.ByteArrayInputStream;
|
||||||
|
import java.io.ByteArrayOutputStream;
|
||||||
|
import java.io.IOException;
|
||||||
|
import java.nio.charset.StandardCharsets;
|
||||||
|
import java.security.InvalidAlgorithmParameterException;
|
||||||
|
import java.security.NoSuchAlgorithmException;
|
||||||
|
|
||||||
|
import org.bouncycastle.openpgp.PGPException;
|
||||||
|
import org.bouncycastle.openpgp.PGPPublicKeyRing;
|
||||||
|
import org.bouncycastle.openpgp.PGPSecretKeyRing;
|
||||||
|
import org.bouncycastle.util.io.Streams;
|
||||||
|
import org.junit.jupiter.api.Test;
|
||||||
|
import org.pgpainless.PGPainless;
|
||||||
|
import org.pgpainless.algorithm.DocumentSignatureType;
|
||||||
|
import org.pgpainless.decryption_verification.DecryptionStream;
|
||||||
|
import org.pgpainless.decryption_verification.OpenPgpMetadata;
|
||||||
|
import org.pgpainless.encryption_signing.EncryptionOptions;
|
||||||
|
import org.pgpainless.encryption_signing.EncryptionStream;
|
||||||
|
import org.pgpainless.encryption_signing.ProducerOptions;
|
||||||
|
import org.pgpainless.encryption_signing.SigningOptions;
|
||||||
|
import org.pgpainless.key.protection.SecretKeyRingProtector;
|
||||||
|
import org.pgpainless.key.util.KeyRingUtils;
|
||||||
|
import org.pgpainless.util.Passphrase;
|
||||||
|
|
||||||
|
public class Encrypt {
|
||||||
|
|
||||||
|
/**
|
||||||
|
* In this example, Alice is sending a signed and encrypted message to Bob.
|
||||||
|
* She signs the message using her key and then encrypts the message to both bobs certificate and her own.
|
||||||
|
*
|
||||||
|
* Bob subsequently decrypts the message using his key and verifies that the message was signed by Alice using
|
||||||
|
* her certificate.
|
||||||
|
*/
|
||||||
|
@Test
|
||||||
|
public void encryptAndSignMessage() throws PGPException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IOException {
|
||||||
|
// Prepare keys
|
||||||
|
PGPSecretKeyRing keyAlice = PGPainless.generateKeyRing()
|
||||||
|
.modernKeyRing("alice@pgpainless.org", null);
|
||||||
|
PGPPublicKeyRing certificateAlice = KeyRingUtils.publicKeyRingFrom(keyAlice);
|
||||||
|
SecretKeyRingProtector protectorAlice = SecretKeyRingProtector.unprotectedKeys();
|
||||||
|
|
||||||
|
PGPSecretKeyRing keyBob = PGPainless.generateKeyRing()
|
||||||
|
.modernKeyRing("bob@pgpainless.org", null);
|
||||||
|
PGPPublicKeyRing certificateBob = KeyRingUtils.publicKeyRingFrom(keyBob);
|
||||||
|
SecretKeyRingProtector protectorBob = SecretKeyRingProtector.unprotectedKeys();
|
||||||
|
|
||||||
|
// plaintext message to encrypt
|
||||||
|
String message = "Hello, World!\n";
|
||||||
|
ByteArrayOutputStream ciphertext = new ByteArrayOutputStream();
|
||||||
|
// Encrypt and sign
|
||||||
|
EncryptionStream encryptor = PGPainless.encryptAndOrSign()
|
||||||
|
.onOutputStream(ciphertext)
|
||||||
|
.withOptions(ProducerOptions.signAndEncrypt(
|
||||||
|
// we want to encrypt communication (affects key selection based on key flags)
|
||||||
|
EncryptionOptions.encryptCommunications()
|
||||||
|
.addRecipient(certificateBob)
|
||||||
|
.addRecipient(certificateAlice),
|
||||||
|
new SigningOptions()
|
||||||
|
.addInlineSignature(protectorAlice, keyAlice, DocumentSignatureType.CANONICAL_TEXT_DOCUMENT)
|
||||||
|
).setAsciiArmor(true)
|
||||||
|
);
|
||||||
|
|
||||||
|
// Pipe data trough and CLOSE the stream (important)
|
||||||
|
Streams.pipeAll(new ByteArrayInputStream(message.getBytes(StandardCharsets.UTF_8)), encryptor);
|
||||||
|
encryptor.close();
|
||||||
|
String encryptedMessage = ciphertext.toString();
|
||||||
|
|
||||||
|
// Decrypt and verify signatures
|
||||||
|
DecryptionStream decryptor = PGPainless.decryptAndOrVerify()
|
||||||
|
.onInputStream(new ByteArrayInputStream(encryptedMessage.getBytes(StandardCharsets.UTF_8)))
|
||||||
|
.decryptWith(protectorBob, keyBob)
|
||||||
|
.verifyWith(certificateAlice)
|
||||||
|
.ignoreMissingPublicKeys()
|
||||||
|
.build();
|
||||||
|
|
||||||
|
ByteArrayOutputStream plaintext = new ByteArrayOutputStream();
|
||||||
|
|
||||||
|
Streams.pipeAll(decryptor, plaintext);
|
||||||
|
decryptor.close();
|
||||||
|
|
||||||
|
// Check the metadata to see how the message was encrypted/signed
|
||||||
|
OpenPgpMetadata metadata = decryptor.getResult();
|
||||||
|
assertTrue(metadata.isEncrypted());
|
||||||
|
assertTrue(metadata.containsVerifiedSignatureFrom(certificateAlice));
|
||||||
|
assertEquals(message, plaintext.toString());
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* This example demonstrates how to encrypt and decrypt a message using a passphrase.
|
||||||
|
* This method can be combined with public key based encryption and signing.
|
||||||
|
*
|
||||||
|
* @throws PGPException
|
||||||
|
* @throws IOException
|
||||||
|
*/
|
||||||
|
@Test
|
||||||
|
public void encryptUsingPassphrase() throws PGPException, IOException {
|
||||||
|
String message = "Hello, World!";
|
||||||
|
ByteArrayOutputStream ciphertext = new ByteArrayOutputStream();
|
||||||
|
// Encrypt
|
||||||
|
EncryptionStream encryptor = PGPainless.encryptAndOrSign()
|
||||||
|
.onOutputStream(ciphertext)
|
||||||
|
.withOptions(ProducerOptions
|
||||||
|
.encrypt(EncryptionOptions.encryptCommunications()
|
||||||
|
.addPassphrase(Passphrase.fromPassword("p4ssphr4s3"))
|
||||||
|
).setAsciiArmor(true)
|
||||||
|
);
|
||||||
|
|
||||||
|
Streams.pipeAll(new ByteArrayInputStream(message.getBytes(StandardCharsets.UTF_8)), encryptor);
|
||||||
|
encryptor.close();
|
||||||
|
|
||||||
|
String asciiCiphertext = ciphertext.toString();
|
||||||
|
|
||||||
|
// Decrypt
|
||||||
|
DecryptionStream decryptor = PGPainless.decryptAndOrVerify()
|
||||||
|
.onInputStream(new ByteArrayInputStream(asciiCiphertext.getBytes(StandardCharsets.UTF_8)))
|
||||||
|
.decryptWith(Passphrase.fromPassword("p4ssphr4s3"))
|
||||||
|
.doNotVerify()
|
||||||
|
.build();
|
||||||
|
|
||||||
|
ByteArrayOutputStream plaintext = new ByteArrayOutputStream();
|
||||||
|
Streams.pipeAll(decryptor, plaintext);
|
||||||
|
|
||||||
|
decryptor.close();
|
||||||
|
|
||||||
|
assertEquals(message, plaintext.toString());
|
||||||
|
}
|
||||||
|
}
|
Loading…
Reference in a new issue