Output to the PGP encryption logic is incorrect

Question

I am trying to encrypt a message in PGP, but the encryption is not working properly. The encryption message I am getting is not being decrypted. On using a platform online to decrypt and encrypt using same set of keys- its working good. But when I am trying to encrypt it using my logic- it's not working.

I have added public/private keys that I generated for the test.

I feel the output of the message encryption code using PGP is wrong.This is the error I am facing when I am trying to decrypt the PGP message that I fetched as output from the below code -

org.bouncycastle.openpgp.PGPRuntimeOperationException: Iterator failed to get next object: unknown object in stream: 20 Caused by: java.io.IOException: unknown object in stream:

This is the groovy code-

@Grab(group='org.bouncycastle', module='bcpkix-jdk15on', version='1.70')
@Grab(group='org.bouncycastle', module='bcpg-jdk15on', version='1.70')
@Grab(group='org.bouncycastle', module='bcprov-jdk15on', version='1.70')

import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.io.InputStream
import java.io.OutputStream
import java.io.IOException
import java.security.SecureRandom
import java.util.Iterator
import org.bouncycastle.openpgp.*
import org.bouncycastle.openpgp.operator.jcajce.JcePublicKeyKeyEncryptionMethodGenerator
import org.bouncycastle.openpgp.operator.jcajce.JcePGPDataEncryptorBuilder
import org.bouncycastle.openpgp.operator.jcajce.JcaKeyFingerprintCalculator
import org.bouncycastle.util.Iterable
import org.bouncycastle.bcpg.ArmoredOutputStream


String message = "This is a secret message."
byte[] messageBytes = message.getBytes("UTF-8")
byte[] encryptedMessage


PGPPublicKey publicKey = readPublicKey("""-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: Keybase OpenPGP v1.0.0
Comment: https://keybase.io/crypto
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=b1tp
-----END PGP PUBLIC KEY BLOCK-----""")


PGPEncryptedDataGenerator encryptedDataGenerator = new PGPEncryptedDataGenerator(
                new JcePGPDataEncryptorBuilder(PGPEncryptedData.AES_256)
                        .setWithIntegrityPacket(true)
                        .setSecureRandom(new SecureRandom())
)

encryptedDataGenerator.addMethod(
        new JcePublicKeyKeyEncryptionMethodGenerator(publicKey)
                .setSecureRandom(new SecureRandom()))

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ArmoredOutputStream aOut = new ArmoredOutputStream(byteArrayOutputStream);
OutputStream cOut = encryptedDataGenerator.open(aOut, messageBytes.length);
cOut.write(messageBytes);
cOut.close();
aOut.close();
System.out.println(byteArrayOutputStream.toString());




private PGPPublicKey readPublicKey(String publicKeyString) throws IOException, PGPException {
    InputStream inputStream = PGPUtil.getDecoderStream(new ByteArrayInputStream(publicKeyString.getBytes("UTF-8")))
    PGPPublicKeyRingCollection pgpPublicKeyRingCollection = new PGPPublicKeyRingCollection(inputStream, new JcaKeyFingerprintCalculator())

    Iterator publicKeyRingIter = pgpPublicKeyRingCollection.getKeyRings()

    while (publicKeyRingIter.hasNext()) {
        PGPPublicKeyRing publicKeyRing = (PGPPublicKeyRing) publicKeyRingIter.next()
        Iterator publicKeyIter = publicKeyRing.getPublicKeys()

        while (publicKeyIter.hasNext()) {
            PGPPublicKey key = publicKeyIter.next()
            if (key.isEncryptionKey()) {
                return key
            }
        }
    }
    throw new IllegalArgumentException("Can't find encryption key in key ring.")
}

This is the private key-

The output is -

But I am unable to decrypt this. What am I doing wrong while encrypting?

Output to the PGP encryption logic is incorrect

Answers (1)

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