demo.cms.envelopedData

Class EnvelopedDataOutputStreamDemo

java.lang.Object

demo.cms.envelopedData.EnvelopedDataOutputStreamDemo

public class EnvelopedDataOutputStreamDemo
extends java.lang.Object

Demonstrates the usage of class EnvelopedDataOutputStream and for encrypting data using the CMS type EnvelopedData.

Constructor Summary

Constructors

Constructor and Description
EnvelopedDataOutputStreamDemo() Setup the demo certificate chains.

Method Summary

Modifier and Type	Method and Description
byte[]	createEnvelopedDataStream(byte[] message) Creates a CMS EnvelopedData and wraps it into a ContentInfo.
byte[]	getEnvelopedDataStream(byte[] encoding, java.security.PrivateKey privateKey, int recipientInfoIndex) Decrypts the encrypted content of the given EnvelopedData object for the specified recipient and returns the decrypted (= original) message.
static void	main(java.lang.String[] argv) Main method.
void	start() Starts the demo.

Methods inherited from class java.lang.Object

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

Constructor Detail

EnvelopedDataOutputStreamDemo

public EnvelopedDataOutputStreamDemo()
                              throws java.io.IOException

Setup 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

createEnvelopedDataStream

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

Creates a CMS EnvelopedData and wraps it into a ContentInfo.

Parameters:

message - the message to be enveloped, as byte representation

Returns:

the encoded EnvelopedData object just created, wrapped into a ContentInfo

Throws:

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

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

getEnvelopedDataStream

public byte[] getEnvelopedDataStream(byte[] encoding,
                                     java.security.PrivateKey privateKey,
                                     int recipientInfoIndex)
                              throws iaik.cms.CMSException,
                                     java.io.IOException

Decrypts the encrypted content of the given EnvelopedData object for the specified recipient and returns the decrypted (= original) message.

Parameters:

encoding - the encoded EnvelopedData object, wrapped in a ContentInfo

privateKey - the private key to decrypt the message

recipientInfoIndex - the index into the RecipientInfo array to which the specified private key belongs

Returns:

the recovered message, as byte array

Throws:

iaik.cms.CMSException - if the message cannot be recovered

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

start

public void start()

Starts the demo.

main

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

Main method.

Throws:

java.lang.Exception - if an some error occurs