org.bouncycastle.operator
Class DefaultSignatureAlgorithmIdentifierFinder

java.lang.Object
  org.bouncycastle.operator.DefaultSignatureAlgorithmIdentifierFinder

All Implemented Interfaces:

SignatureAlgorithmIdentifierFinder

public class DefaultSignatureAlgorithmIdentifierFinder

extends java.lang.Object

implements SignatureAlgorithmIdentifierFinder

Default implementation of SignatureAlgorithmIdentifierFinder, returning the (algorithm OID plus any algorithm-specific parameters) used to name a signature scheme in X.509 certificates, CMS SignedData, OCSP responses and related PKIX structures.

Parameter-field convention for RSA-PSS: when this finder builds the structure for names, the hash sub-identifier inside the field (and the inner hash inside ) is emitted with parameters, following RFC 4055 §2.1 which defines } (and the same pattern for SHA-1 / SHA-224 / SHA-384 / SHA-512). SHA-3 inside PSS follows the same NULL-parameter convention here for consistency.

This is a different convention from DefaultDigestAlgorithmIdentifierFinder, which (for the CMS contexts it serves) follows RFC 5754 §2 and emits SHA-2 / SHA-3 digest identifiers with the field absent. Both forms are standards-compliant in their respective slots; the practical consequence is that a single CMS SignedData with a PSS SignerInfo will validly contain the same SHA-2 OID encoded both ways. See the class-level javadoc on DefaultDigestAlgorithmIdentifierFinder for the cross-reference.

Constructor Summary

DefaultSignatureAlgorithmIdentifierFinder()

Method Summary

org.bouncycastle.asn1.x509.AlgorithmIdentifier

find(java.lang.String sigAlgName) Find the signature algorithm identifier that matches with the passed in signature algorithm name.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultSignatureAlgorithmIdentifierFinder

public DefaultSignatureAlgorithmIdentifierFinder()

Method Detail

find

public org.bouncycastle.asn1.x509.AlgorithmIdentifier find(java.lang.String sigAlgName)

Description copied from interface: SignatureAlgorithmIdentifierFinder

Find the signature algorithm identifier that matches with the passed in signature algorithm name.

Specified by:

find in interface SignatureAlgorithmIdentifierFinder

Parameters:

sigAlgName - the name of the signature algorithm of interest.

Returns:

an algorithm identifier for the corresponding signature.