demo.cms.envelopedData

Class PasswordRecipientInfoDemo

java.lang.Object

demo.cms.envelopedData.PasswordRecipientInfoDemo

public class PasswordRecipientInfoDemo
extends java.lang.Object

This class shows the usage of the CMS RecipientInfo type PasswordRecipientInfo as specified by RFC 5652.

Constructor Summary

Constructors

Constructor and Description
PasswordRecipientInfoDemo() Default constructor.

Method Summary

Modifier and Type	Method and Description
byte[]	createEnvelopedData(byte[] message, char[] password, iaik.asn1.structures.AlgorithmID keyDerivationAlg, java.security.spec.AlgorithmParameterSpec keyDerivatoinParamSpec, iaik.asn1.structures.AlgorithmID keyEncrAlg, java.security.AlgorithmParameters keyEncrParams) Creates a CMS EnvelopedData with a PasswordRecipientInfo and wraps it into a ContentInfo.
byte[]	createEnvelopedDataStream(byte[] message, char[] password, iaik.asn1.structures.AlgorithmID keyDerivationAlg, java.security.spec.AlgorithmParameterSpec keyDerivatoinParamSpec, iaik.asn1.structures.AlgorithmID keyEncrAlg, java.security.AlgorithmParameters keyEncrParams) Creates a CMS EnvelopedData with a PasswordRecipientInfo and wraps it into a ContentInfo (stream implementation).
byte[]	getEnvelopedData(byte[] encoding, char[] password, java.lang.String cekAlgName) PBE based decrypts the encrypted content of the given EnvelopedData object and returns the decrypted (= original) message.
byte[]	getEnvelopedDataStream(byte[] encoding, char[] password, java.lang.String cekAlgName) PBE based decrypts the encrypted content of the given EnvelopedData object and returns the decrypted (= original) message (stream implementation).
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

PasswordRecipientInfoDemo

public PasswordRecipientInfoDemo()

Default constructor.

Method Detail

createEnvelopedDataStream

public byte[] createEnvelopedDataStream(byte[] message,
                                        char[] password,
                                        iaik.asn1.structures.AlgorithmID keyDerivationAlg,
                                        java.security.spec.AlgorithmParameterSpec keyDerivatoinParamSpec,
                                        iaik.asn1.structures.AlgorithmID keyEncrAlg,
                                        java.security.AlgorithmParameters keyEncrParams)
                                 throws iaik.cms.CMSException,
                                        java.io.IOException

Creates a CMS EnvelopedData with a PasswordRecipientInfo and wraps it into a ContentInfo (stream implementation).

Parameters:

message - the message to be enveloped, as byte representation

password - the password from which to derive the key encryption key (kek)

keyDerivationAlg - the key derivation function to be used for deriving the kek

keyDerivatoinParamSpec - any parameters required by the key derivation function

keyEncrAlg - the ID of the key-encryption (key-wrap) algorithm to be used for encrypting the content-encryption key

keyEncrParams - any algorithm parameters to be used for intializing the key wrap cipher

Returns:

the 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,
                                     char[] password,
                                     java.lang.String cekAlgName)
                              throws iaik.cms.CMSException,
                                     java.io.IOException

PBE based decrypts the encrypted content of the given EnvelopedData object and returns the decrypted (= original) message (stream implementation).

Parameters:

encoding - the encoded ContentInfo containing an EnvelopedData object

password - the password from which to derive the key-encryption key (kek) to be used for decrypting the content-encryption key (cek)

cekAlgName - the name of the cek (content encryption key) algorithm

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,
                                  char[] password,
                                  iaik.asn1.structures.AlgorithmID keyDerivationAlg,
                                  java.security.spec.AlgorithmParameterSpec keyDerivatoinParamSpec,
                                  iaik.asn1.structures.AlgorithmID keyEncrAlg,
                                  java.security.AlgorithmParameters keyEncrParams)
                           throws iaik.cms.CMSException

Creates a CMS EnvelopedData with a PasswordRecipientInfo and wraps it into a ContentInfo.

Parameters:

message - the message to be enveloped, as byte representation

password - the password from which to derive the key encryption key (kek)

keyDerivationAlg - the key derivation function to be used for deriving the kek

keyDerivatoinParamSpec - any parameters required by the key derivation function

keyEncrAlg - the ID of the key-encryption (key-wrap) algorithm to be used for encrypting the content-encryption key

keyEncrParams - any algorithm parameters to be used for intializing the key wrap cipher

Returns:

the encoded ContentInfo containing the EnvelopedData object just created

Throws:

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

getEnvelopedData

public byte[] getEnvelopedData(byte[] encoding,
                               char[] password,
                               java.lang.String cekAlgName)
                        throws iaik.cms.CMSException,
                               java.io.IOException

PBE based decrypts the encrypted content of the given EnvelopedData object and returns the decrypted (= original) message.

Parameters:

encoding - the encoded ContentInfo containing an EnvelopedData object

password - the password from which to derive the key-encryption key (kek) to be used for decrypting the content-encryption key (cek)

cekAlgName - the name of the cek (content encryption key) algorithm

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 some error occurs