com.novosec.pkix.asn1.crmf.EncryptedValue.java Source code

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Here is the source code for com.novosec.pkix.asn1.crmf.EncryptedValue.java

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// CMP implementation copyright (c) 2003 NOVOSEC AG (http://www.novosec.com)
//
// Author: Maik Stohn
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this 
// software and associated documentation files (the "Software"), to deal in the Software 
// without restriction, including without limitation the rights to use, copy, modify, merge, 
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons 
// to whom the Software is furnished to do so, subject to the following conditions: 
//
// The above copyright notice and this permission notice shall be included in all copies or 
// substantial portions of the Software. 
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
// BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 

package com.novosec.pkix.asn1.crmf;

import java.util.Enumeration;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DERBitString;
import org.bouncycastle.asn1.DEREncodable;
import org.bouncycastle.asn1.DERObject;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

/**
 * ASN.1 structure DER En/DeCoder.
 *
 * <pre>
 *   EncryptedValue ::= SEQUENCE {
 *     intendedAlg   [0] AlgorithmIdentifier  OPTIONAL, -- the intended algorithm for which the value will be used
 *     symmAlg       [1] AlgorithmIdentifier  OPTIONAL, -- the symmetric algorithm used to encrypt the value
 *     encSymmKey    [2] BIT STRING           OPTIONAL, -- the (encrypted) symmetric key used to encrypt the value
 *     keyAlg        [3] AlgorithmIdentifier  OPTIONAL, -- algorithm used to encrypt the symmetric key
 *     valueHint     [4] OCTET STRING         OPTIONAL, -- a brief description or identifier of the encValue content (may be meaningful only to the sending entity, and used only if EncryptedValue might be re-examined by the sending entity in the future)
 *     encValue       BIT STRING }                      -- the encrypted value itself
 *
 * </pre>
 */

public class EncryptedValue implements DEREncodable {
    AlgorithmIdentifier intendedAlg;
    AlgorithmIdentifier symmAlg;
    DERBitString encSymmKey;
    AlgorithmIdentifier keyAlg;
    DEROctetString valueHint;
    DERBitString encValue;

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

    public static EncryptedValue getInstance(Object obj) {
        if (obj instanceof EncryptedValue) {
            return (EncryptedValue) obj;
        } else if (obj instanceof ASN1Sequence) {
            return new EncryptedValue((ASN1Sequence) obj);
        }

        throw new IllegalArgumentException("unknown object in factory");
    }

    public EncryptedValue(ASN1Sequence seq) {
        Enumeration e = seq.getObjects();
        while (e.hasMoreElements()) {
            Object obj = e.nextElement();

            if (obj instanceof DERTaggedObject) {
                DERTaggedObject tagObj = (DERTaggedObject) obj;

                switch (tagObj.getTagNo()) {
                case 0:
                    this.intendedAlg = AlgorithmIdentifier.getInstance(tagObj.getObject());
                    break;
                case 1:
                    this.symmAlg = AlgorithmIdentifier.getInstance(tagObj.getObject());
                    break;
                case 2:
                    this.encSymmKey = DERBitString.getInstance(tagObj.getObject());
                    break;
                case 3:
                    this.keyAlg = AlgorithmIdentifier.getInstance(tagObj.getObject());
                    break;
                case 4:
                    this.valueHint = (DEROctetString) DEROctetString.getInstance(tagObj.getObject());
                    break;
                }
            } else {
                encValue = DERBitString.getInstance(obj);
                break;
            }
        }
    }

    public EncryptedValue(DERBitString encValue) {
        this.encValue = encValue;
    }

    public AlgorithmIdentifier getIntendedAlg() {
        return intendedAlg;
    }

    public void setIntendedAlg(AlgorithmIdentifier intendedAlg) {
        this.intendedAlg = intendedAlg;
    }

    public AlgorithmIdentifier getSymmAlg() {
        return symmAlg;
    }

    public void setSymmAlg(AlgorithmIdentifier symmAlg) {
        this.symmAlg = symmAlg;
    }

    public DERBitString getEncSymmKey() {
        return encSymmKey;
    }

    public void setEncSymmKey(DERBitString encSymmKey) {
        this.encSymmKey = encSymmKey;
    }

    public AlgorithmIdentifier getKeyAlg() {
        return keyAlg;
    }

    public void setKeyAlg(AlgorithmIdentifier keyAlg) {
        this.keyAlg = keyAlg;
    }

    public DEROctetString getValueHint() {
        return valueHint;
    }

    public void setValueHint(DEROctetString valueHint) {
        this.valueHint = valueHint;
    }

    public DERBitString getEncValue() {
        return encValue;
    }

    public DERObject getDERObject() {
        ASN1EncodableVector v = new ASN1EncodableVector();

        if (intendedAlg != null) {
            v.add(new DERTaggedObject(false, 0, intendedAlg));
        }
        if (symmAlg != null) {
            v.add(new DERTaggedObject(false, 1, symmAlg));
        }
        if (encSymmKey != null) {
            v.add(new DERTaggedObject(false, 2, encSymmKey));
        }
        if (keyAlg != null) {
            v.add(new DERTaggedObject(false, 3, keyAlg));
        }
        if (valueHint != null) {
            v.add(new DERTaggedObject(false, 4, valueHint));
        }

        v.add(encValue);

        return new DERSequence(v);
    }

    public String toString() {
        String s = "EncryptedValue: (";

        if (this.getIntendedAlg() != null) {
            s += "intendedAlg: " + this.getIntendedAlg() + ", ";
        }
        if (this.getSymmAlg() != null) {
            s += "symmAlg: " + this.getSymmAlg() + ", ";
        }
        if (this.getEncSymmKey() != null) {
            s += "encSymmKey: " + this.getEncSymmKey() + ", ";
        }
        if (this.getKeyAlg() != null) {
            s += "keyAlg: " + this.getKeyAlg() + ", ";
        }
        if (this.getValueHint() != null) {
            s += "valueHint: " + this.getValueHint() + ", ";
        }
        s += "encValue: " + this.getEncValue() + ")";

        return s;
    }
}