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package org.bouncycastle.asn1.cms;
import java.util.Enumeration;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERSequence;
import org.bouncycastle.asn1.DERTaggedObject;
/**
* <a href="http://tools.ietf.org/html/rfc5652#section-6.1">RFC 5652</a> EnvelopedData object.
* <pre>
* EnvelopedData ::= SEQUENCE {
* version CMSVersion,
* originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL,
* recipientInfos RecipientInfos,
* encryptedContentInfo EncryptedContentInfo,
* unprotectedAttrs [1] IMPLICIT UnprotectedAttributes OPTIONAL
* }
* </pre>
*/
public class EnvelopedData
extends ASN1Object
{
private ASN1Integer version;
private OriginatorInfo originatorInfo;
private ASN1Set recipientInfos;
private EncryptedContentInfo encryptedContentInfo;
private ASN1Set unprotectedAttrs;
public EnvelopedData(
OriginatorInfo originatorInfo,
ASN1Set recipientInfos,
EncryptedContentInfo encryptedContentInfo,
ASN1Set unprotectedAttrs)
{
version = new ASN1Integer(calculateVersion(originatorInfo, recipientInfos, unprotectedAttrs));
this.originatorInfo = originatorInfo;
this.recipientInfos = recipientInfos;
this.encryptedContentInfo = encryptedContentInfo;
this.unprotectedAttrs = unprotectedAttrs;
}
public EnvelopedData(
OriginatorInfo originatorInfo,
ASN1Set recipientInfos,
EncryptedContentInfo encryptedContentInfo,
Attributes unprotectedAttrs)
{
version = new ASN1Integer(calculateVersion(originatorInfo, recipientInfos, ASN1Set.getInstance(unprotectedAttrs)));
this.originatorInfo = originatorInfo;
this.recipientInfos = recipientInfos;
this.encryptedContentInfo = encryptedContentInfo;
this.unprotectedAttrs = ASN1Set.getInstance(unprotectedAttrs);
}
/**
* @deprecated use getInstance()
*/
public EnvelopedData(
ASN1Sequence seq)
{
int index = 0;
version = (ASN1Integer)seq.getObjectAt(index++);
Object tmp = seq.getObjectAt(index++);
if (tmp instanceof ASN1TaggedObject)
{
originatorInfo = OriginatorInfo.getInstance((ASN1TaggedObject)tmp, false);
tmp = seq.getObjectAt(index++);
}
recipientInfos = ASN1Set.getInstance(tmp);
encryptedContentInfo = EncryptedContentInfo.getInstance(seq.getObjectAt(index++));
if(seq.size() > index)
{
unprotectedAttrs = ASN1Set.getInstance((ASN1TaggedObject)seq.getObjectAt(index), false);
}
}
/**
* Return an EnvelopedData object from a tagged object.
*
* @param obj the tagged object holding the object we want.
* @param explicit true if the object is meant to be explicitly
* tagged false otherwise.
* @exception IllegalArgumentException if the object held by the
* tagged object cannot be converted.
*/
public static EnvelopedData getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
/**
* Return an EnvelopedData object from the given object.
* <p>
* Accepted inputs:
* <ul>
* <li> null → null
* <li> {@link EnvelopedData} object
* <li> {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with EnvelopedData structure inside
* </ul>
*
* @param obj the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static EnvelopedData getInstance(
Object obj)
{
if (obj instanceof EnvelopedData)
{
return (EnvelopedData)obj;
}
if (obj != null)
{
return new EnvelopedData(ASN1Sequence.getInstance(obj));
}
return null;
}
public ASN1Integer getVersion()
{
return version;
}
public OriginatorInfo getOriginatorInfo()
{
return originatorInfo;
}
public ASN1Set getRecipientInfos()
{
return recipientInfos;
}
public EncryptedContentInfo getEncryptedContentInfo()
{
return encryptedContentInfo;
}
public ASN1Set getUnprotectedAttrs()
{
return unprotectedAttrs;
}
/**
* Produce an object suitable for an ASN1OutputStream.
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(version);
if (originatorInfo != null)
{
v.add(new DERTaggedObject(false, 0, originatorInfo));
}
v.add(recipientInfos);
v.add(encryptedContentInfo);
if (unprotectedAttrs != null)
{
v.add(new DERTaggedObject(false, 1, unprotectedAttrs));
}
return new BERSequence(v);
}
public static int calculateVersion(OriginatorInfo originatorInfo, ASN1Set recipientInfos, ASN1Set unprotectedAttrs)
{
int version;
if (originatorInfo != null || unprotectedAttrs != null)
{
version = 2;
}
else
{
version = 0;
Enumeration e = recipientInfos.getObjects();
while (e.hasMoreElements())
{
RecipientInfo ri = RecipientInfo.getInstance(e.nextElement());
if (ri.getVersion().getValue().intValue() != version)
{
version = 2;
break;
}
}
}
return version;
}
}
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