demo.cms.envelopedData

Class OaepEnvelopedDataDemo

java.lang.Object

demo.cms.envelopedData.OaepEnvelopedDataDemo

public class OaepEnvelopedDataDemo
extends java.lang.Object

This class demonstrates the CMS EnvelopedData implementation for the RSA-OAEP (PKCS#1v2.1) algorithm.

All keys and certificates are read from a keystore created by the SetupKeyStore program.

Version:

File Revision 21

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
byte[]	createEnvelopedData(byte[] message) Creates a CMS EnvelopedData message.
byte[]	createEnvelopedDataStream(byte[] message) Creates a CMS EnvelopedDataStream message.
byte[]	getEnvelopedData(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.
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() Shows thw CMS EnvelopedData implementation for the RSA-OAEP (PKCS#1v2.1) algorithm.

Methods inherited from class java.lang.Object

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

Constructor Detail

OaepEnvelopedDataDemo

public OaepEnvelopedDataDemo()
                      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 EnvelopedDataStream message.

Parameters:

message - the message to be enveloped, as byte representation

Returns:

the BER encoded ContentInfo containing the EnvelopedData object just created

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 BER encoded ContentInfo containing an EnvelopedData object

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

createEnvelopedData

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

Creates a CMS EnvelopedData message.

Parameters:

message - the message to be enveloped, as byte representation

Returns:

a BER encoded ContentInfo holding the EnvelopedData object just created

Throws:

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

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

getEnvelopedData

public byte[] getEnvelopedData(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 ContentInfo encoding holding an EnvelopedData

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()

Shows thw CMS EnvelopedData implementation for the RSA-OAEP (PKCS#1v2.1) algorithm.

main

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

Main method.

Throws:

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

java.lang.Exception