Retrieve and return a PGPPrivateKey from an ASCII-Armored block (in this case on disk).

gistfile1.java

    private PGPPrivateKey getPrivateKey(Long keyId, String keyPassphrase) {
        PGPSecretKeyRing pgpSecretKeyRing = null;
        PGPPrivateKey pgpPrivateKey = null;
        PGPSecretKey pgpSecretKey = null;

        try {
            FileInputStream fis = new FileInputStream("/tmp/sec9.asc");
            ArmoredInputStream ais = new ArmoredInputStream(fis);
            pgpSecretKeyRing = new PGPSecretKeyRing(ais, new BcKeyFingerprintCalculator());
            pgpSecretKey = pgpSecretKeyRing.getSecretKey(keyId);
            PBESecretKeyDecryptor pbeSecretKeyDecryptor =
                    new BcPBESecretKeyDecryptorBuilder(
                            new BcPGPDigestCalculatorProvider()).build(keyPassphrase.toCharArray());
            pgpPrivateKey = pgpSecretKey.extractPrivateKey(pbeSecretKeyDecryptor);
            System.out.println("Private Key ID: " + pgpPrivateKey.getKeyID());
        } catch (FileNotFoundException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        } catch (IOException e) {
            e.printStackTrace();
        } catch (PGPException e) {
            e.printStackTrace();
        }

        return pgpPrivateKey;
    }