AltSignatureValue (Bouncy Castle Cryptography 1.79 API Specification)

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;

Constructor Summary

Constructors
Constructor Description

AltSignatureValue(byte[] signature)
Base constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static AltSignatureValue`	`fromExtensions(Extensions extensions)`
`static AltSignatureValue`	`getInstance(java.lang.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 Detail
  - AltSignatureValue
```
public AltSignatureValue(byte[] signature)
```
    Base constructor.
    
    Parameters:
    
    signature - a signature value, based on the enclosing certificate.
- Method Detail
  - getInstance
```
public static AltSignatureValue getInstance(ASN1TaggedObject obj,
                                            boolean explicit)
```
  - getInstance
```
public static AltSignatureValue getInstance(java.lang.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.