demo.cms.signedData
Class SignedDataInOutStreamDemoWithAdditionalSignerInfo

java.lang.Object
  demo.cms.signedData.SignedDataInOutStreamDemoWithAdditionalSignerInfo

public class SignedDataInOutStreamDemoWithAdditionalSignerInfo
extends java.lang.Object

This class demonstrates the usage of class SignedDataInOutStream to add a new SignerInfo to an existing, parsed SignedData object.

Constructor Summary

SignedDataInOutStreamDemoWithAdditionalSignerInfo()
Constructor.

Method Summary

byte[]	createSignedDataStream(byte[] message, int mode) Creates a CMS SignedData object.
byte[]	getSignedDataStream(byte[] signedData, byte[] message, boolean writeAgain) Parses a CMS SignedData object and verifies the signatures for all participated signers.
static void	main(java.lang.String[] argv) The main method.
void	start() Starts the test.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SignedDataInOutStreamDemoWithAdditionalSignerInfo

public SignedDataInOutStreamDemoWithAdditionalSignerInfo()

Constructor. Reads required keys/certs from the demo keystore.

Method Detail

createSignedDataStream

public byte[] createSignedDataStream(byte[] message,
                                     int mode)
                              throws iaik.cms.CMSException,
                                     java.io.IOException

Creates a CMS SignedData object.

Parameters:

message - the message to be signed, as byte representation

mode - the mode indicating whether to include the content (SignedDataStream.IMPLICIT) or not (SignedDataStream.EXPLICIT)

Returns:

the encoding of the SignedData object just created

Throws:

iaik.cms.CMSException - if the SignedData object cannot be created

java.io.IOException - if an I/O error occurs

getSignedDataStream

public byte[] getSignedDataStream(byte[] signedData,
                                  byte[] message,
                                  boolean writeAgain)
                           throws iaik.cms.CMSException,
                                  java.io.IOException,
                                  java.security.NoSuchAlgorithmException

Parses a CMS SignedData object and verifies the signatures for all participated signers.

Parameters:

signedData - the SignedData, as BER encoded byte array

message - the message which was transmitted out-of-band (if explicit signed)

writeAgain - whether to add a SignerInfo and encode the SignedData again

Returns:

the inherent message as byte array, or the BER encoded SignedData if it shall be encoded again

Throws:

iaik.cms.CMSException - if any signature does not verify

java.io.IOException - if an I/O error occurs

java.security.NoSuchAlgorithmException

start

public void start()

Starts the test.

main

public static void main(java.lang.String[] argv)
                 throws java.io.IOException

The main method.

Throws:

java.io.IOException - if an I/O error occurs when reading required keys and certificates from files