com.cms.crypto
Class XERParameterGenerator

java.lang.Object
  com.cms.crypto.XERParameterGenerator

All Implemented Interfaces:

ParameterGenerator

public class XERParameterGenerator
extends java.lang.Object
implements ParameterGenerator

Generates ASN.1 "open type" algorithm parameters values encoded using the Canonical XML Encoding Rules (CXER) of ASN.1.

AES algorithm parameter definitions

The ECB algorithms have no parameters, not even NULL. The CBC and OFB algorthms have parameters of ASN.1 type AES-IV, and the CFB algoritms have parameters of type CFBParameters.

ASN.1 type AES-IV is defined as

 AES-IV ::= OCTET STRING (SIZE(16))
 

and the XML encoding of a value of this ASN.1 type is tagged as "<AES-IV> ... </AES-IV>".

ASN.1 type CFBParameters is defined as

 CFBParameters ::= SEQUENCE {
    aes-IV        AES-IV,
    numberOfBits  NumberOfBits
 }
    
 NumberOfBits ::= INTEGER(1..128)
 

TDES algorithm parameter definitions

ASN.1 type IV is defined as

    IV ::= OCTET STRING (SIZE(8))
 

and the XML encoding of a value of this ASN.1 type is tagged as "<IV> ... </IV>".

Version:

1.00 - 2006/01/25

Author:

support@phillipgriffin.com

Constructor Summary

XERParameterGenerator(CXERCodec codec)
Constructor for XERParameterGenerator with ASN.1 encoding rules parameter.

Method Summary

java.security.spec.AlgorithmParameterSpec	get3DesCbcParameters(ASN1OpenType parameters) Gets 3DES CBC encoded open type parameters.
java.security.spec.AlgorithmParameterSpec	getAes128CbcParameters(ASN1OpenType parameters) Gets the ASN.1 "open type" parameters for the 128-bit AES in CBC mode algorithm encoded using CXER.

Methods inherited from class java.lang.Object

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

Constructor Detail

XERParameterGenerator

public XERParameterGenerator(CXERCodec codec)

Constructor for XERParameterGenerator with ASN.1 encoding rules parameter.

Parameters:

codec - ASN.1 encoding rules

Method Detail

getAes128CbcParameters

public java.security.spec.AlgorithmParameterSpec getAes128CbcParameters(ASN1OpenType parameters)
                                                                 throws CryptoException

Gets the ASN.1 "open type" parameters for the 128-bit AES in CBC mode algorithm encoded using CXER.

Specified by:

getAes128CbcParameters in interface ParameterGenerator

Parameters:

parameters - an ASN.1 "open type"

Returns:

128-bit AES with CBC algorithm parameters

Throws:

CryptoException

get3DesCbcParameters

public java.security.spec.AlgorithmParameterSpec get3DesCbcParameters(ASN1OpenType parameters)
                                                               throws CryptoException

Gets 3DES CBC encoded open type parameters.

Specified by:

get3DesCbcParameters in interface ParameterGenerator

Parameters:

parameters - an open type encoding of a value of type IV

Returns:

null no value

Throws:

CryptoException