pgp.java

            case PGPPublicKey.RSA_ENCRYPT:
            case PGPPublicKey.RSA_GENERAL:
            case PGPPublicKey.RSA_SIGN:
            case PGPPublicKey.DSA:
            case PGPPublicKey.ELGAMAL_ENCRYPT:
            case PGPPublicKey.ELGAMAL_GENERAL:
            case PGPPublicKey.ECDH:
            case PGPPublicKey.ECDSA:
            case PGPPublicKey.EDDSA:
            default:
                throw new PGPException("unknown public key algorithm encountered");