org.bouncycastle.asn1.tsp.EncryptionInfo Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of bcutil-jdk15to18 Show documentation

The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls. This jar contains APIs for JDK 1.5 to JDK 1.8.

There is a newer version: 1.78.1

Show newest version

package org.bouncycastle.asn1.tsp;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DLSequence;

/**
 * Implementation of the EncryptionInfo element defined in RFC 4998:
 * 
 * 1988 ASN.1 EncryptionInfo
 * 

 * EncryptionInfo       ::=     SEQUENCE {
 * encryptionInfoType     OBJECT IDENTIFIER,
 * encryptionInfoValue    ANY DEFINED BY encryptionInfoType
 * }
 * 

 * 1997-ASN.1 EncryptionInfo
 * 

 * EncryptionInfo       ::=     SEQUENCE {
 * encryptionInfoType   ENCINFO-TYPE.&id
 * ({SupportedEncryptionAlgorithms}),
 * encryptionInfoValue  ENCINFO-TYPE.&Type
 * ({SupportedEncryptionAlgorithms}{@encryptionInfoType})
 * }
 * 

 * ENCINFO-TYPE ::= TYPE-IDENTIFIER
 * 
 * SupportedEncryptionAlgorithms ENCINFO-TYPE ::= {...}
 */
public class EncryptionInfo
    extends ASN1Object
{

    /**
     * The OID for EncryptionInfo type.
     */
    private ASN1ObjectIdentifier encryptionInfoType;

    /**
     * The value of EncryptionInfo
     */
    private ASN1Encodable encryptionInfoValue;

    public static EncryptionInfo getInstance(final ASN1Object obj)
    {
        if (obj instanceof EncryptionInfo)
        {
            return (EncryptionInfo)obj;
        }
        else if (obj != null)
        {
            return new EncryptionInfo(ASN1Sequence.getInstance(obj));
        }

        return null;
    }

    public static EncryptionInfo getInstance(
        ASN1TaggedObject obj,
        boolean explicit)
    {
        return getInstance(ASN1Sequence.getInstance(obj, explicit));
    }

    private EncryptionInfo(ASN1Sequence sequence)
    {
        if (sequence.size() != 2)
        {
            throw new IllegalArgumentException("wrong sequence size in constructor: " + sequence.size());
        }

        this.encryptionInfoType = ASN1ObjectIdentifier.getInstance(sequence.getObjectAt(0));
        this.encryptionInfoValue = sequence.getObjectAt(1);
    }

    public EncryptionInfo(ASN1ObjectIdentifier encryptionInfoType,
                          ASN1Encodable encryptionInfoValue)
    {
        this.encryptionInfoType = encryptionInfoType;
        this.encryptionInfoValue = encryptionInfoValue;
    }

    public ASN1Primitive toASN1Primitive()
    {
        ASN1EncodableVector v = new ASN1EncodableVector(2);
        v.add(encryptionInfoType);
        v.add(encryptionInfoValue);

        return new DLSequence(v);
    }
}