Package org.bouncycastle.asn1.x509

Class AltSignatureValue

java.lang.Object

org.bouncycastle.asn1.ASN1Object

org.bouncycastle.asn1.x509.AltSignatureValue

All Implemented Interfaces:

ASN1Encodable, Encodable

public class AltSignatureValue
extends ASN1Object

X.509 Section 9.8.4.
This extension may be used as a public-key certificate extension, a CRL extension or an AVL extension. This alternative signature shall be created by the issuer using its alternative private key, and it shall be verified using the alternative public key of the issuer.

 altSignatureValue EXTENSION ::= {
     SYNTAX AltSignatureValue
     IDENTIFIED BY id-ce-altSignatureValue }

 AltSignatureValue ::= BIT STRING
 

This extension can only be created by a signer holding a multiple cryptographic algorithms public-key certificate. When creating the alternative digital signature on an issued public-key certificate or CRL, the signer shall use its alternative private key.
The procedures for creating and validating alternative digital signatures are specified in:

• clause 7.2.2 for public-key certificates;
• clause 7.10.3 for CRLs: and
• clause 11.4 for AVLs.

Constructor Summary

Constructors

Constructor	Description
AltSignatureValue(byte[] signature)	Base constructor.

Method Summary

Modifier and Type	Method	Description
static AltSignatureValue	fromExtensions(Extensions extensions)
static AltSignatureValue	getInstance(Object obj)
static AltSignatureValue	getInstance(ASN1TaggedObject obj, boolean explicit)
ASN1BitString	getSignature()	Return the alternate signature to verify the certificate.
ASN1Primitive	toASN1Primitive()	Method providing a primitive representation of this object suitable for encoding.

Methods inherited from class org.bouncycastle.asn1.ASN1Object

encodeTo, encodeTo, equals, getEncoded, getEncoded, hasEncodedTagValue, hashCode

Methods inherited from class java.lang.Object

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

Constructor Details

AltSignatureValue

public AltSignatureValue(byte[] signature)

Base constructor.

Parameters:

signature - a signature value, based on the enclosing certificate.

Method Details

getInstance

public static AltSignatureValue getInstance(ASN1TaggedObject obj,
 boolean explicit)

getInstance

public static AltSignatureValue getInstance(Object obj)

fromExtensions

public static AltSignatureValue fromExtensions(Extensions extensions)

getSignature

public ASN1BitString getSignature()

Return the alternate signature to verify the certificate.

Returns:

certificate's alternate signature.

toASN1Primitive

public ASN1Primitive toASN1Primitive()

Description copied from class: ASN1Object

Method providing a primitive representation of this object suitable for encoding.

Specified by:

toASN1Primitive in interface ASN1Encodable

Specified by:

toASN1Primitive in class ASN1Object

Returns:

a primitive representation of this object.