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package org.spongycastle.asn1.smime;
import java.util.Enumeration;
import java.util.Vector;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.cms.Attribute;
import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers;
/**
* Handler class for dealing with S/MIME Capabilities
*/
public class SMIMECapabilities
extends ASN1Object
{
/**
* general preferences
*/
public static final ASN1ObjectIdentifier preferSignedData = PKCSObjectIdentifiers.preferSignedData;
public static final ASN1ObjectIdentifier canNotDecryptAny = PKCSObjectIdentifiers.canNotDecryptAny;
public static final ASN1ObjectIdentifier sMIMECapabilitesVersions = PKCSObjectIdentifiers.sMIMECapabilitiesVersions;
/**
* encryption algorithms preferences
*/
public static final ASN1ObjectIdentifier dES_CBC = new ASN1ObjectIdentifier("1.3.14.3.2.7");
public static final ASN1ObjectIdentifier dES_EDE3_CBC = PKCSObjectIdentifiers.des_EDE3_CBC;
public static final ASN1ObjectIdentifier rC2_CBC = PKCSObjectIdentifiers.RC2_CBC;
private ASN1Sequence capabilities;
/**
* return an Attribute object from the given object.
*
* @param o the object we want converted.
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static SMIMECapabilities getInstance(
Object o)
{
if (o == null || o instanceof SMIMECapabilities)
{
return (SMIMECapabilities)o;
}
if (o instanceof ASN1Sequence)
{
return new SMIMECapabilities((ASN1Sequence)o);
}
if (o instanceof Attribute)
{
return new SMIMECapabilities(
(ASN1Sequence)(((Attribute)o).getAttrValues().getObjectAt(0)));
}
throw new IllegalArgumentException("unknown object in factory: " + o.getClass().getName());
}
public SMIMECapabilities(
ASN1Sequence seq)
{
capabilities = seq;
}
/**
* returns a vector with 0 or more objects of all the capabilities
* matching the passed in capability OID. If the OID passed is null the
* entire set is returned.
*/
public Vector getCapabilities(
ASN1ObjectIdentifier capability)
{
Enumeration e = capabilities.getObjects();
Vector list = new Vector();
if (capability == null)
{
while (e.hasMoreElements())
{
SMIMECapability cap = SMIMECapability.getInstance(e.nextElement());
list.addElement(cap);
}
}
else
{
while (e.hasMoreElements())
{
SMIMECapability cap = SMIMECapability.getInstance(e.nextElement());
if (capability.equals(cap.getCapabilityID()))
{
list.addElement(cap);
}
}
}
return list;
}
/**
* Produce an object suitable for an ASN1OutputStream.
* <pre>
* SMIMECapabilities ::= SEQUENCE OF SMIMECapability
* </pre>
*/
public ASN1Primitive toASN1Primitive()
{
return capabilities;
}
}
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