bouncycastle-get-pgppublickey.java

final InputStream pubKeyStream = getClass().getClassLoader().getResourceAsStream("pubkey.asc");
assertNotNull(pubKeyStream);

PGPPublicKeyRingCollection pubRingCollection = new PGPPublicKeyRingCollection(
        PGPUtil.getDecoderStream(pubKeyStream),
        new JcaKeyFingerprintCalculator());

final PGPPublicKeyRing pgpPublicKeyRing = pubRingCollection.getKeyRings().next();
assertNotNull(pgpPublicKeyRing);
final PGPPublicKey pgpPublicKey = pgpPublicKeyRing.getPublicKey();

final JcaPGPKeyConverter converter = new JcaPGPKeyConverter();
PublicKey publicKey = converter.getPublicKey(pgpPublicKey);
assertNotNull(publicKey);