| package org.bouncycastle.asn1.x509; |
| |
| import org.bouncycastle.asn1.ASN1Encodable; |
| import org.bouncycastle.asn1.ASN1EncodableVector; |
| import org.bouncycastle.asn1.ASN1ObjectIdentifier; |
| import org.bouncycastle.asn1.ASN1Sequence; |
| import org.bouncycastle.asn1.ASN1TaggedObject; |
| import org.bouncycastle.asn1.DEREncodable; |
| import org.bouncycastle.asn1.DERNull; |
| import org.bouncycastle.asn1.DERObject; |
| import org.bouncycastle.asn1.DERObjectIdentifier; |
| import org.bouncycastle.asn1.DERSequence; |
| |
| public class AlgorithmIdentifier |
| extends ASN1Encodable |
| { |
| private DERObjectIdentifier objectId; |
| private DEREncodable parameters; |
| private boolean parametersDefined = false; |
| |
| public static AlgorithmIdentifier getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| return getInstance(ASN1Sequence.getInstance(obj, explicit)); |
| } |
| |
| public static AlgorithmIdentifier getInstance( |
| Object obj) |
| { |
| if (obj== null || obj instanceof AlgorithmIdentifier) |
| { |
| return (AlgorithmIdentifier)obj; |
| } |
| |
| if (obj instanceof DERObjectIdentifier) |
| { |
| return new AlgorithmIdentifier((DERObjectIdentifier)obj); |
| } |
| |
| if (obj instanceof String) |
| { |
| return new AlgorithmIdentifier((String)obj); |
| } |
| |
| if (obj instanceof ASN1Sequence) |
| { |
| return new AlgorithmIdentifier((ASN1Sequence)obj); |
| } |
| |
| throw new IllegalArgumentException("unknown object in factory: " + obj.getClass().getName()); |
| } |
| |
| public AlgorithmIdentifier( |
| DERObjectIdentifier objectId) |
| { |
| this.objectId = objectId; |
| } |
| |
| public AlgorithmIdentifier( |
| String objectId) |
| { |
| this.objectId = new DERObjectIdentifier(objectId); |
| } |
| |
| public AlgorithmIdentifier( |
| DERObjectIdentifier objectId, |
| DEREncodable parameters) |
| { |
| parametersDefined = true; |
| this.objectId = objectId; |
| this.parameters = parameters; |
| } |
| |
| public AlgorithmIdentifier( |
| ASN1Sequence seq) |
| { |
| if (seq.size() < 1 || seq.size() > 2) |
| { |
| throw new IllegalArgumentException("Bad sequence size: " |
| + seq.size()); |
| } |
| |
| objectId = DERObjectIdentifier.getInstance(seq.getObjectAt(0)); |
| |
| if (seq.size() == 2) |
| { |
| parametersDefined = true; |
| parameters = seq.getObjectAt(1); |
| } |
| else |
| { |
| parameters = null; |
| } |
| } |
| |
| public ASN1ObjectIdentifier getAlgorithm() |
| { |
| return new ASN1ObjectIdentifier(objectId.getId()); |
| } |
| |
| /** |
| * @deprecated use getAlgorithm |
| * @return |
| */ |
| public DERObjectIdentifier getObjectId() |
| { |
| return objectId; |
| } |
| |
| public DEREncodable getParameters() |
| { |
| return parameters; |
| } |
| |
| /** |
| * Produce an object suitable for an ASN1OutputStream. |
| * <pre> |
| * AlgorithmIdentifier ::= SEQUENCE { |
| * algorithm OBJECT IDENTIFIER, |
| * parameters ANY DEFINED BY algorithm OPTIONAL } |
| * </pre> |
| */ |
| public DERObject toASN1Object() |
| { |
| ASN1EncodableVector v = new ASN1EncodableVector(); |
| |
| v.add(objectId); |
| |
| if (parametersDefined) |
| { |
| if (parameters != null) |
| { |
| v.add(parameters); |
| } |
| else |
| { |
| v.add(DERNull.INSTANCE); |
| } |
| } |
| |
| return new DERSequence(v); |
| } |
| } |