diff options
Diffstat (limited to 'core/src/main/java/org/spongycastle/asn1/smime/SMIMECapabilities.java')
-rw-r--r-- | core/src/main/java/org/spongycastle/asn1/smime/SMIMECapabilities.java | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/smime/SMIMECapabilities.java b/core/src/main/java/org/spongycastle/asn1/smime/SMIMECapabilities.java new file mode 100644 index 00000000..e25f5eb3 --- /dev/null +++ b/core/src/main/java/org/spongycastle/asn1/smime/SMIMECapabilities.java @@ -0,0 +1,115 @@ +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; + } +} |