demo.cms.signedData

Class SHA2withDSASignedDataDemo

java.lang.Object

demo.cms.signedData.SHA2withDSASignedDataDemo

public class SHA2withDSASignedDataDemo
extends java.lang.Object

Demonstrates the usage of class SignedDataStream and SignedData for signing some data using the CMS type SignedData with SHA2withDSA signature algorithm according to FIPS 186-3.

Constructor Summary

Constructors

Constructor and Description
SHA2withDSASignedDataDemo() Setups the demo certificate chains.

Method Summary

Modifier and Type	Method and Description
byte[]	createSignedData(byte[] message, int mode) Creates a CMS SignedData object.
byte[]	createSignedDataStream(byte[] message, int mode) Creates a CMS SignedData object.
byte[]	getSignedData(byte[] encoding, byte[] message) Parses a CMS SignedData object and verifies the signatures for all participated signers.
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() Tests the CMS SignedData implementation.

Methods inherited from class java.lang.Object

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

Constructor Detail

SHA2withDSASignedDataDemo

public SHA2withDSASignedDataDemo()
                          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 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

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 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

createSignedData

public byte[] createSignedData(byte[] message,
                               int mode)
                        throws iaik.cms.CMSException

Creates a CMS SignedData object.

Parameters:

message - the message to be signed, as byte representation

mode - the mode, either SignedData.IMPLICIT or SignedData.EXPLICIT

Returns:

the DER encoded SignedData object

Throws:

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

getSignedData

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

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

Parameters:

encoding - the DER encoded SignedData object

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()

Tests the CMS SignedData 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