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package org.spongycastle.asn1.x509;
import java.math.BigInteger;
import java.util.Enumeration;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1OctetString;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.ASN1TaggedObject;
import org.spongycastle.asn1.DEROctetString;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.DERTaggedObject;
import org.spongycastle.crypto.Digest;
import org.spongycastle.crypto.digests.SHA1Digest;
/**
* The AuthorityKeyIdentifier object.
* <pre>
* id-ce-authorityKeyIdentifier OBJECT IDENTIFIER ::= { id-ce 35 }
*
* AuthorityKeyIdentifier ::= SEQUENCE {
* keyIdentifier [0] IMPLICIT KeyIdentifier OPTIONAL,
* authorityCertIssuer [1] IMPLICIT GeneralNames OPTIONAL,
* authorityCertSerialNumber [2] IMPLICIT CertificateSerialNumber OPTIONAL }
*
* KeyIdentifier ::= OCTET STRING
* </pre>
*
*/
public class AuthorityKeyIdentifier
extends ASN1Object
{
ASN1OctetString keyidentifier=null;
GeneralNames certissuer=null;
ASN1Integer certserno=null;
public static AuthorityKeyIdentifier getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
public static AuthorityKeyIdentifier getInstance(
Object obj)
{
if (obj instanceof AuthorityKeyIdentifier)
{
return (AuthorityKeyIdentifier)obj;
}
if (obj != null)
{
return new AuthorityKeyIdentifier(ASN1Sequence.getInstance(obj));
}
return null;
}
public static AuthorityKeyIdentifier fromExtensions(Extensions extensions)
{
return AuthorityKeyIdentifier.getInstance(extensions.getExtensionParsedValue(Extension.authorityKeyIdentifier));
}
protected AuthorityKeyIdentifier(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
while (e.hasMoreElements())
{
ASN1TaggedObject o = DERTaggedObject.getInstance(e.nextElement());
switch (o.getTagNo())
{
case 0:
this.keyidentifier = ASN1OctetString.getInstance(o, false);
break;
case 1:
this.certissuer = GeneralNames.getInstance(o, false);
break;
case 2:
this.certserno = ASN1Integer.getInstance(o, false);
break;
default:
throw new IllegalArgumentException("illegal tag");
}
}
}
/**
*
* Calulates the keyidentifier using a SHA1 hash over the BIT STRING
* from SubjectPublicKeyInfo as defined in RFC2459.
*
* Example of making a AuthorityKeyIdentifier:
* <pre>
* SubjectPublicKeyInfo apki = new SubjectPublicKeyInfo((ASN1Sequence)new ASN1InputStream(
* publicKey.getEncoded()).readObject());
* AuthorityKeyIdentifier aki = new AuthorityKeyIdentifier(apki);
* </pre>
*
**/
public AuthorityKeyIdentifier(
SubjectPublicKeyInfo spki)
{
Digest digest = new SHA1Digest();
byte[] resBuf = new byte[digest.getDigestSize()];
byte[] bytes = spki.getPublicKeyData().getBytes();
digest.update(bytes, 0, bytes.length);
digest.doFinal(resBuf, 0);
this.keyidentifier = new DEROctetString(resBuf);
}
/**
* create an AuthorityKeyIdentifier with the GeneralNames tag and
* the serial number provided as well.
*/
public AuthorityKeyIdentifier(
SubjectPublicKeyInfo spki,
GeneralNames name,
BigInteger serialNumber)
{
Digest digest = new SHA1Digest();
byte[] resBuf = new byte[digest.getDigestSize()];
byte[] bytes = spki.getPublicKeyData().getBytes();
digest.update(bytes, 0, bytes.length);
digest.doFinal(resBuf, 0);
this.keyidentifier = new DEROctetString(resBuf);
this.certissuer = GeneralNames.getInstance(name.toASN1Primitive());
this.certserno = new ASN1Integer(serialNumber);
}
/**
* create an AuthorityKeyIdentifier with the GeneralNames tag and
* the serial number provided.
*/
public AuthorityKeyIdentifier(
GeneralNames name,
BigInteger serialNumber)
{
this.keyidentifier = null;
this.certissuer = GeneralNames.getInstance(name.toASN1Primitive());
this.certserno = new ASN1Integer(serialNumber);
}
/**
* create an AuthorityKeyIdentifier with a precomputed key identifier
*/
public AuthorityKeyIdentifier(
byte[] keyIdentifier)
{
this.keyidentifier = new DEROctetString(keyIdentifier);
this.certissuer = null;
this.certserno = null;
}
/**
* create an AuthorityKeyIdentifier with a precomputed key identifier
* and the GeneralNames tag and the serial number provided as well.
*/
public AuthorityKeyIdentifier(
byte[] keyIdentifier,
GeneralNames name,
BigInteger serialNumber)
{
this.keyidentifier = new DEROctetString(keyIdentifier);
this.certissuer = GeneralNames.getInstance(name.toASN1Primitive());
this.certserno = new ASN1Integer(serialNumber);
}
public byte[] getKeyIdentifier()
{
if (keyidentifier != null)
{
return keyidentifier.getOctets();
}
return null;
}
public GeneralNames getAuthorityCertIssuer()
{
return certissuer;
}
public BigInteger getAuthorityCertSerialNumber()
{
if (certserno != null)
{
return certserno.getValue();
}
return null;
}
/**
* Produce an object suitable for an ASN1OutputStream.
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
if (keyidentifier != null)
{
v.add(new DERTaggedObject(false, 0, keyidentifier));
}
if (certissuer != null)
{
v.add(new DERTaggedObject(false, 1, certissuer));
}
if (certserno != null)
{
v.add(new DERTaggedObject(false, 2, certserno));
}
return new DERSequence(v);
}
public String toString()
{
return ("AuthorityKeyIdentifier: KeyID(" + this.keyidentifier.getOctets() + ")");
}
}
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