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package org.spongycastle.asn1.x509;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Enumerated;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.ASN1TaggedObject;
import org.spongycastle.asn1.DERBitString;
import org.spongycastle.asn1.DERSequence;
/**
* ObjectDigestInfo ASN.1 structure used in v2 attribute certificates.
*
* <pre>
*
* ObjectDigestInfo ::= SEQUENCE {
* digestedObjectType ENUMERATED {
* publicKey (0),
* publicKeyCert (1),
* otherObjectTypes (2) },
* -- otherObjectTypes MUST NOT
* -- be used in this profile
* otherObjectTypeID OBJECT IDENTIFIER OPTIONAL,
* digestAlgorithm AlgorithmIdentifier,
* objectDigest BIT STRING
* }
*
* </pre>
*
*/
public class ObjectDigestInfo
extends ASN1Object
{
/**
* The public key is hashed.
*/
public final static int publicKey = 0;
/**
* The public key certificate is hashed.
*/
public final static int publicKeyCert = 1;
/**
* An other object is hashed.
*/
public final static int otherObjectDigest = 2;
ASN1Enumerated digestedObjectType;
ASN1ObjectIdentifier otherObjectTypeID;
AlgorithmIdentifier digestAlgorithm;
DERBitString objectDigest;
public static ObjectDigestInfo getInstance(
Object obj)
{
if (obj instanceof ObjectDigestInfo)
{
return (ObjectDigestInfo)obj;
}
if (obj != null)
{
return new ObjectDigestInfo(ASN1Sequence.getInstance(obj));
}
return null;
}
public static ObjectDigestInfo getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
/**
* Constructor from given details.
* <p>
* If <code>digestedObjectType</code> is not {@link #publicKeyCert} or
* {@link #publicKey} <code>otherObjectTypeID</code> must be given,
* otherwise it is ignored.
*
* @param digestedObjectType The digest object type.
* @param otherObjectTypeID The object type ID for
* <code>otherObjectDigest</code>.
* @param digestAlgorithm The algorithm identifier for the hash.
* @param objectDigest The hash value.
*/
public ObjectDigestInfo(
int digestedObjectType,
ASN1ObjectIdentifier otherObjectTypeID,
AlgorithmIdentifier digestAlgorithm,
byte[] objectDigest)
{
this.digestedObjectType = new ASN1Enumerated(digestedObjectType);
if (digestedObjectType == otherObjectDigest)
{
this.otherObjectTypeID = otherObjectTypeID;
}
this.digestAlgorithm = digestAlgorithm;
this.objectDigest = new DERBitString(objectDigest);
}
private ObjectDigestInfo(
ASN1Sequence seq)
{
if (seq.size() > 4 || seq.size() < 3)
{
throw new IllegalArgumentException("Bad sequence size: "
+ seq.size());
}
digestedObjectType = ASN1Enumerated.getInstance(seq.getObjectAt(0));
int offset = 0;
if (seq.size() == 4)
{
otherObjectTypeID = ASN1ObjectIdentifier.getInstance(seq.getObjectAt(1));
offset++;
}
digestAlgorithm = AlgorithmIdentifier.getInstance(seq.getObjectAt(1 + offset));
objectDigest = DERBitString.getInstance(seq.getObjectAt(2 + offset));
}
public ASN1Enumerated getDigestedObjectType()
{
return digestedObjectType;
}
public ASN1ObjectIdentifier getOtherObjectTypeID()
{
return otherObjectTypeID;
}
public AlgorithmIdentifier getDigestAlgorithm()
{
return digestAlgorithm;
}
public DERBitString getObjectDigest()
{
return objectDigest;
}
/**
* Produce an object suitable for an ASN1OutputStream.
*
* <pre>
*
* ObjectDigestInfo ::= SEQUENCE {
* digestedObjectType ENUMERATED {
* publicKey (0),
* publicKeyCert (1),
* otherObjectTypes (2) },
* -- otherObjectTypes MUST NOT
* -- be used in this profile
* otherObjectTypeID OBJECT IDENTIFIER OPTIONAL,
* digestAlgorithm AlgorithmIdentifier,
* objectDigest BIT STRING
* }
*
* </pre>
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(digestedObjectType);
if (otherObjectTypeID != null)
{
v.add(otherObjectTypeID);
}
v.add(digestAlgorithm);
v.add(objectDigest);
return new DERSequence(v);
}
}
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