No (suitable) public key for encryption to p12 email address found

Question

I was trying to encrypt the files with bouncy-gpg and my p12 key. But it's getting an error No (suitable) public key for encryption to p12 email address found Honestly, I am a newbie with a bouncy castle. That would be appreciated with any advice.

            KeyStore keystore = KeyStore.getInstance("PKCS12", "SunJSSE");
            keystore.load(is, p12Password.toCharArray());
            String alias = keystore.aliases().nextElement();

            PrivateKey privateKey = (PrivateKey)keystore.getKey(alias, p12Password.toCharArray());

            Certificate cert = keystore.getCertificate(alias);
            PublicKey publicKey = cert.getPublicKey();

            X509Certificate x509cert = (X509Certificate) cert;
            X509Principal principal = PrincipalUtil.getSubjectX509Principal(x509cert);
            Vector<?> values = principal.getValues(X509Name.EmailAddress);
            String email = (String) values.get(0);

            JcaPGPKeyConverter jcaPGPKeyConverter = new JcaPGPKeyConverter();
            PGPPublicKey pgpPublicKey = jcaPGPKeyConverter.getPGPPublicKey(1, publicKey, new Date());

            PGPPrivateKey pgpPrivateKey = jcaPGPKeyConverter.getPGPPrivateKey(pgpPublicKey, privateKey);
            PGPSecretKey pgpSecretKey = new PGPSecretKey(pgpPrivateKey, pgpPublicKey, null, true, null);

            final InMemoryKeyring keyring = KeyringConfigs.forGpgExportedKeys(KeyringConfigCallbacks.withPassword(p12Password));
            keyring.addPublicKey(pgpPublicKey.getEncoded());
            keyring.addSecretKey(pgpSecretKey.getEncoded());

            final OutputStream outputStream = BouncyGPG
                            .encryptToStream()
                            .withConfig(keyring)
                            .withStrongAlgorithms()
                            .toRecipient(email)
                            .andDoNotSign()
                            .binaryOutput()
                            .andWriteTo(bufferedOut);

Answer 1

Modified code:

            hsub.setKeyFlags(false, 0xF);

            PGPKeyRingGenerator gen = new PGPKeyRingGenerator(
                    PGPSignature.DEFAULT_CERTIFICATION,
                    new PGPKeyPair(pgpPublicKey, pgpPrivateKey),
                    '<' + email + '>',
                    null,
                    null,
                    null,
                    new JcaPGPContentSignerBuilder(pgpPublicKey.getAlgorithm(), HashAlgorithmTags.SHA1),
                    new JcePBESecretKeyEncryptorBuilder(SymmetricKeyAlgorithmTags.NULL).build(p12Password.toCharArray())
            );

            //PGPSecretKey pgpSecretKey = new PGPSecretKey(pgpPrivateKey, pgpPublicKey, null, true, null);

            final InMemoryKeyring keyring = KeyringConfigs.forGpgExportedKeys(KeyringConfigCallbacks.withPassword(p12Password));
            keyring.addPublicKey(gen.generatePublicKeyRing().getEncoded());
            keyring.addSecretKey(gen.generateSecretKeyRing().getEncoded());

            try (
                    final InputStream cipherTextStream = Files.newInputStream(sourceFile);

                    final OutputStream fileOutput = Files.newOutputStream(destFile);
                    final BufferedOutputStream bufferedOut = new BufferedOutputStream(fileOutput, BUFFERSIZE);

                    final InputStream plaintextStream = BouncyGPG
                            .decryptAndVerifyStream()
                            .withConfig(keyring)
                            .andValidateSomeoneSigned()
                            .fromEncryptedInputStream(cipherTextStream)