org.bouncycastle.asn1.x509
Class SubjectKeyIdentifier

java.lang.Object
  org.bouncycastle.asn1.ASN1Encodable
      org.bouncycastle.asn1.x509.SubjectKeyIdentifier

All Implemented Interfaces:

DEREncodable

Direct Known Subclasses:

SubjectKeyIdentifierStructure

public class SubjectKeyIdentifier
extends ASN1Encodable

The SubjectKeyIdentifier object.

 SubjectKeyIdentifier::= OCTET STRING
 

Field Summary

Fields inherited from class org.bouncycastle.asn1.ASN1Encodable

BER, DER

Constructor Summary

SubjectKeyIdentifier(ASN1OctetString keyid)

SubjectKeyIdentifier(byte[] keyid)

SubjectKeyIdentifier(SubjectPublicKeyInfo spki)
Calculates the keyidentifier using a SHA1 hash over the BIT STRING from SubjectPublicKeyInfo as defined in RFC3280.

Method Summary

static SubjectKeyIdentifier	createSHA1KeyIdentifier(SubjectPublicKeyInfo keyInfo) Return a RFC 3280 type 1 key identifier.
static SubjectKeyIdentifier	createTruncatedSHA1KeyIdentifier(SubjectPublicKeyInfo keyInfo) Return a RFC 3280 type 2 key identifier.
static SubjectKeyIdentifier	getInstance(ASN1TaggedObject obj, boolean explicit)
static SubjectKeyIdentifier	getInstance(java.lang.Object obj)
byte[]	getKeyIdentifier()
DERObject	toASN1Object()

Methods inherited from class org.bouncycastle.asn1.ASN1Encodable

equals, getDEREncoded, getDERObject, getEncoded, getEncoded, hashCode

Methods inherited from class java.lang.Object

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

Constructor Detail

SubjectKeyIdentifier

public SubjectKeyIdentifier(byte[] keyid)

SubjectKeyIdentifier

public SubjectKeyIdentifier(ASN1OctetString keyid)

SubjectKeyIdentifier

public SubjectKeyIdentifier(SubjectPublicKeyInfo spki)

Calculates the keyidentifier using a SHA1 hash over the BIT STRING from SubjectPublicKeyInfo as defined in RFC3280.

Parameters:

spki - the subject public key info.

Method Detail

getInstance

public static SubjectKeyIdentifier getInstance(ASN1TaggedObject obj,
                                               boolean explicit)

getInstance

public static SubjectKeyIdentifier getInstance(java.lang.Object obj)

getKeyIdentifier

public byte[] getKeyIdentifier()

toASN1Object

public DERObject toASN1Object()

Specified by:

toASN1Object in class ASN1Encodable

createSHA1KeyIdentifier

public static SubjectKeyIdentifier createSHA1KeyIdentifier(SubjectPublicKeyInfo keyInfo)

Return a RFC 3280 type 1 key identifier. As in:

 (1) The keyIdentifier is composed of the 160-bit SHA-1 hash of the
 value of the BIT STRING subjectPublicKey (excluding the tag,
 length, and number of unused bits).
 

Parameters:

keyInfo - the key info object containing the subjectPublicKey field.

Returns:

the key identifier.

createTruncatedSHA1KeyIdentifier

public static SubjectKeyIdentifier createTruncatedSHA1KeyIdentifier(SubjectPublicKeyInfo keyInfo)

Return a RFC 3280 type 2 key identifier. As in:

 (2) The keyIdentifier is composed of a four bit type field with
 the value 0100 followed by the least significant 60 bits of the
 SHA-1 hash of the value of the BIT STRING subjectPublicKey.
 

Parameters:

keyInfo - the key info object containing the subjectPublicKey field.

Returns:

the key identifier.