codec.x509.extensions
Class CertHashExtension

java.lang.Object
  |
  +--java.util.AbstractCollection
        |
        +--java.util.AbstractList
              |
              +--java.util.ArrayList
                    |
                    +--codec.asn1.ASN1AbstractCollection
                          |
                          +--codec.asn1.ASN1Sequence
                                |
                                +--codec.x509.X509Extension
                                      |
                                      +--codec.x509.extensions.CertHashExtension

All Implemented Interfaces:

ASN1Collection, ASN1Type, Cloneable, Collection, Externalizable, List, Serializable, X509Extension

public class CertHashExtension

extends X509Extension

id-sigi-at-certHash OBJECT IDENTIFIER ::= { 1 3 36 8 3 13 }

 certHash EXTENSION ::= {
   SYNTAX CertHashSyntax
   IDENTIFIED BY id-sigi-at-certHash
 }
 CertHashSyntax ::= SEQUENCE {
   hashAlgorithm AlgorithmIdentifier,
   certificateHash OCTET STRING
 }
 

Version:

"$Id: CertHashExtension.java,v 1.1 2004/08/16 13:31:37 pebinger Exp $"

Author:

Volker Roth

See Also:

Serialized Form

Field Summary

static String	DEFAULT_HASH_ALG
static String	EXTENSION_OID

Fields inherited from class codec.x509.X509Extension

critical, extnID, extnValue

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

CertHashExtension()
Creates an instance ready for decoding.

CertHashExtension(byte[] cert, String alg)
Creates an instance with a hash of the given encoded certificate where the hash is computed with the given hash algorithm.

CertHashExtension(X509Certificate cert)
Creates an instance with the hash of the given certificate.

CertHashExtension(X509Certificate cert, String alg)
Creates an instance with a hash of the given certificate where the hash is computed with the given hash algorithm.

Method Summary

void	decode(Decoder dec) Reads this collection from the given Decoder.
AlgorithmIdentifier	getHashAlgorithmID()
String	getHashAlgorithmName()
boolean	verify(byte[] cert)
boolean	verify(X509Certificate cert)

Methods inherited from class codec.x509.X509Extension

decodeExtensionValue, getCriticalExtensionOIDs, getEncoded, getExtensionValue, getNonCriticalExtensionOIDs, getOID, getValue, hasUnsupportedCriticalExtension, isCritical, setCritical, setOID, setValue, toString, toString

Methods inherited from class codec.asn1.ASN1Sequence

getTag

Methods inherited from class codec.asn1.ASN1AbstractCollection

checkConstraints, encode, getCollection, getConstraint, getTagClass, isExplicit, isOptional, isType, readExternal, setConstraint, setExplicit, setOptional, writeExternal

Methods inherited from class java.util.ArrayList

add, add, addAll, addAll, clear, clone, contains, ensureCapacity, get, indexOf, isEmpty, lastIndexOf, remove, removeRange, set, size, toArray, toArray, trimToSize

Methods inherited from class java.util.AbstractList

equals, hashCode, iterator, listIterator, listIterator, subList

Methods inherited from class java.util.AbstractCollection

containsAll, remove, removeAll, retainAll

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Methods inherited from interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray

Methods inherited from interface java.util.List

containsAll, equals, hashCode, iterator, listIterator, listIterator, remove, removeAll, retainAll, subList

Field Detail

DEFAULT_HASH_ALG

public static final String DEFAULT_HASH_ALG

EXTENSION_OID

public static final String EXTENSION_OID

Constructor Detail

CertHashExtension

public CertHashExtension()
                  throws ASN1Exception,
                         CertificateEncodingException

Creates an instance ready for decoding.

CertHashExtension

public CertHashExtension(X509Certificate cert)
                  throws ASN1Exception,
                         GeneralSecurityException

Creates an instance with the hash of the given certificate. The hash is computed with the default hash function DEFAULT_HASH_ALG.

CertHashExtension

public CertHashExtension(X509Certificate cert,
                         String alg)
                  throws ASN1Exception,
                         GeneralSecurityException

Creates an instance with a hash of the given certificate where the hash is computed with the given hash algorithm.

Throws:

NoSuchAlgorithmException - if the given algorithm is not available.

CertificateEncodingException - if the given certificate cannot be encoded correctly.

GeneralSecurityException - if there is another security related error condition.

ASN1Exception - hardly ever, this exception must be declared basically because it is declared in the constructor of the super class.

CertHashExtension

public CertHashExtension(byte[] cert,
                         String alg)
                  throws ASN1Exception,
                         GeneralSecurityException

Creates an instance with a hash of the given encoded certificate where the hash is computed with the given hash algorithm.

Throws:

NoSuchAlgorithmException - if the given algorithm is not available.

GeneralSecurityException - if there is another security related error condition.

ASN1Exception - hardly ever, this exception must be declared basically because it is declared in the constructor of the super class.

Method Detail

decode

public void decode(Decoder dec)
            throws ASN1Exception,
                   IOException

Description copied from class: ASN1AbstractCollection

Reads this collection from the given Decoder. This type is initialized with the decoded data. The components of the decoded collection must match the components of this collection. If they do then the components are also initialized with the decoded values. Otherwise an exception is thrown.

Overrides:

decode in class ASN1AbstractCollection

Following copied from class: codec.asn1.ASN1AbstractCollection

Parameters:

dec - The decoder to read from.

getHashAlgorithmID

public AlgorithmIdentifier getHashAlgorithmID()

getHashAlgorithmName

public String getHashAlgorithmName()

verify

public boolean verify(X509Certificate cert)
               throws NoSuchAlgorithmException,
                      CertificateEncodingException

Returns:

true if the hash of the given certificate equals the hash stored in this structure.

verify

public boolean verify(byte[] cert)
               throws NoSuchAlgorithmException

Returns:

true if the hash of the given certificate equals the hash stored in this structure.