demo.cms.signedData

Class SignedDataOutputStreamDemo

java.lang.Object

demo.cms.signedData.SignedDataOutputStreamDemo

public class SignedDataOutputStreamDemo
extends java.lang.Object

Demonstrates the usage of class SignedDataOutputStream and SignedDataOutputStream for signing some data using the CMS type SignedData.

Constructor Summary

Constructors

Constructor and Description
SignedDataOutputStreamDemo() Setups the demo certificate chains.

Method Summary

Modifier and Type	Method and Description
byte[]	createSignedDataStream(byte[] message, int mode) Creates and encodes a CMS SignedData object.
byte[]	getSignedDataStream(byte[] signedData, byte[] message) 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() Demonstrates the CMS SignedDataOutputStream implementation.

Methods inherited from class java.lang.Object

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

Constructor Detail

SignedDataOutputStreamDemo

public SignedDataOutputStreamDemo()
                           throws java.io.IOException

Setups the demo certificate chains. Keys and certificate are retrieved from the demo KeyStore.

Throws:

java.io.IOException - if an file read error occurs

Method Detail

createSignedDataStream

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

Creates and encodes a CMS SignedData object.

Parameters:

message - the message to be signed, as byte representation

mode - the transmission mode, either IMPLICIT or EXPLICIT

Returns:

the BER encoding of the SignedData object just created, wrapped into a ContentInfo

Throws:

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

java.io.IOException - if some stream I/O error occurs

getSignedDataStream

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

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

Parameters:

signedData - SignedData object (wrapped into a ContentInfo) as BER encoded byte array

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

Returns:

the inherent message as byte array

Throws:

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

java.io.IOException - if some stream I/O error occurs

start

public void start()

Demonstrates the CMS SignedDataOutputStream implementation.

main

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

The main method.

Throws:

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

java.lang.Exception