java.security.Key#getFormat ( )源码实例Demo

private void addOpeningTag(Key key, StringBuilder sb) {
  String format = key.getFormat();
  if (key instanceof PrivateKey) {
    if (format.equals("PKCS#1")) {
      sb.append(PEM.PKCS_1_PRIVATE_KEY_PREFIX).append("\n");
    } else if (format.equals("PKCS#8")) {
      sb.append(PEM.PKCS_8_PRIVATE_KEY_PREFIX).append("\n");
    } else {
      throw new PEMEncoderException(
          new InvalidParameterException("Unexpected Private Key format, expecting PKCS#1 or PKCS#8 but found " + format + "."));
    }
  } else {
    if (format.equals("X.509")) {
      sb.append(PEM.X509_PUBLIC_KEY_PREFIX).append("\n");
    } else {
      throw new PEMEncoderException(
          new InvalidParameterException("Unexpected Public Key format, expecting X.509 but found " + format + "."));
    }
  }
}
 

public SignatureKeyImpl(Key publicKey) {
  this(publicKey.getEncoded(), publicKey.getAlgorithm(), publicKey.getFormat());
}
 

public void execute(Object... args) {
	// let's not care about init since we are hooking 
	// the key class already
	// BUT it can be useful to get a state of the mode 
	// if needed later
	if (_resources != null) {
		try {
			_lastCipher = (Cipher) _resources;
			
			// get the mode
			Integer mode = _lastMode = (Integer) args[0];
			String smode;
			switch (mode) {
				case Cipher.DECRYPT_MODE: 
					smode = "DECRYPT_MODE";
					break;
				case Cipher.ENCRYPT_MODE: 
					smode = "ENCRYPT_MODE";
					break;
				default: 
					smode = "???";
			}
			
			_logBasicInfo();
			
			String out = "-> Mode: " + smode;
			
			// get the key
			Key key = (Key) args[1];
			String skey = "";
			if (key != null) {
				skey = _getReadableByteArr(key.getEncoded());
				out += ", Key format: " + key.getFormat() + 
						", Key: [" + skey + "]";
			}
			_logParameter("Mode", smode);
			_logParameter("Key", skey);
			_logParameter("Key Format", key.getFormat());

			_logFlush_I(out);
			
		} catch (Exception e) {
			Log.w(_TAG_ERROR, "Error in Intro_CRYPTO: " + e);
		}
	}
}