org.bouncycastle.asn1.cms.RecipientInfo Maven / Gradle / Ivy

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The Bouncy Castle Java APIs for ASN.1 extension and utility APIs used to support bcpkix and bctls with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.
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/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1Choice;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * RFC 5652:
 * Content encryption key delivery mechanisms.
 * 
 * 
 * RecipientInfo ::= CHOICE {
 *     ktri      KeyTransRecipientInfo,
 *     kari  [1] KeyAgreeRecipientInfo,
 *     kekri [2] KEKRecipientInfo,
 *     pwri  [3] PasswordRecipientInfo,
 *     ori   [4] OtherRecipientInfo }
 * 
 */
public class RecipientInfo
    extends ASN1Object
    implements ASN1Choice
{
    ASN1Encodable    info;

    public RecipientInfo(
        KeyTransRecipientInfo info)
    {
        this.info = info;
    }

    public RecipientInfo(
        KeyAgreeRecipientInfo info)
    {
        this.info = new DERTaggedObject(false, 1, info);
    }

    public RecipientInfo(
        KEKRecipientInfo info)
    {
        this.info = new DERTaggedObject(false, 2, info);
    }

    public RecipientInfo(
        PasswordRecipientInfo info)
    {
        this.info = new DERTaggedObject(false, 3, info);
    }

    public RecipientInfo(
        OtherRecipientInfo info)
    {
        this.info = new DERTaggedObject(false, 4, info);
    }

    public RecipientInfo(
        ASN1Primitive   info)
    {
        this.info = info;
    }

    /**
     * Return a RecipientInfo object from the given object.
     * 
     * Accepted inputs:
     * 

     *  null → null
     * 
 {@link RecipientInfo} object
     * 
 {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with RecipientInfo structure inside
     * 
 {@link org.bouncycastle.asn1.ASN1TaggedObject#getInstance(java.lang.Object) ASN1TaggedObject} input formats with RecipientInfo structure inside
     * 
     *
     * @param o the object we want converted.
     * @exception IllegalArgumentException if the object cannot be converted.
     */
    public static RecipientInfo getInstance(
        Object  o)
    {
        if (o == null || o instanceof RecipientInfo)
        {
            return (RecipientInfo)o;
        }
        else if (o instanceof ASN1Sequence)
        {
            return new RecipientInfo((ASN1Sequence)o);
        }
        else if (o instanceof ASN1TaggedObject)
        {
            return new RecipientInfo((ASN1TaggedObject)o);
        }

        throw new IllegalArgumentException("unknown object in factory: "
                                                    + o.getClass().getName());
    }

    public ASN1Integer getVersion()
    {
        if (info instanceof ASN1TaggedObject)
        {
            ASN1TaggedObject o = (ASN1TaggedObject)info;

            switch (o.getTagNo())
            {
            case 1:
                return KeyAgreeRecipientInfo.getInstance(o, false).getVersion();
            case 2:
                return getKEKInfo(o).getVersion();
            case 3:
                return PasswordRecipientInfo.getInstance(o, false).getVersion();
            case 4:
                return new ASN1Integer(0);    // no syntax version for OtherRecipientInfo
            default:
                throw new IllegalStateException("unknown tag");
            }
        }

        return KeyTransRecipientInfo.getInstance(info).getVersion();
    }

    public boolean isTagged()
    {
        return (info instanceof ASN1TaggedObject);
    }

    public ASN1Encodable getInfo()
    {
        if (info instanceof ASN1TaggedObject)
        {
            ASN1TaggedObject o = (ASN1TaggedObject)info;

            switch (o.getTagNo())
            {
            case 1:
                return KeyAgreeRecipientInfo.getInstance(o, false);
            case 2:
                return getKEKInfo(o);
            case 3:
                return PasswordRecipientInfo.getInstance(o, false);
            case 4:
                return OtherRecipientInfo.getInstance(o, false);
            default:
                throw new IllegalStateException("unknown tag");
            }
        }

        return KeyTransRecipientInfo.getInstance(info);
    }

    private KEKRecipientInfo getKEKInfo(ASN1TaggedObject o)
    {
        // For compatibility with erroneous version, we don't always pass 'false' here
        boolean declaredExplicit = o.isExplicit();

        return KEKRecipientInfo.getInstance(o, declaredExplicit);
    }

    /**
     * Produce an object suitable for an ASN1OutputStream.
     */
    public ASN1Primitive toASN1Primitive()
    {
        return info.toASN1Primitive();
    }

    boolean isKeyTransV0()
    {
        if (info instanceof ASN1TaggedObject)
        {
            return false;
        }

        KeyTransRecipientInfo ktri = KeyTransRecipientInfo.getInstance(info);

        return ktri.getVersion().hasValue(0);
    }

    boolean isPasswordOrOther()
    {
        if (info instanceof ASN1TaggedObject)
        {
            ASN1TaggedObject tagged = (ASN1TaggedObject)info;
//            if (tagged.hasContextTag())
//            {
                switch (tagged.getTagNo())
                {
                case 3:
                case 4:
                    return true;
                }
//            }
        }
        return false;
    }
}