diff options
Diffstat (limited to 'core/src/main/java/org/spongycastle/asn1/x509/Extensions.java')
-rw-r--r-- | core/src/main/java/org/spongycastle/asn1/x509/Extensions.java | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/x509/Extensions.java b/core/src/main/java/org/spongycastle/asn1/x509/Extensions.java new file mode 100644 index 00000000..9678240a --- /dev/null +++ b/core/src/main/java/org/spongycastle/asn1/x509/Extensions.java @@ -0,0 +1,221 @@ +package org.spongycastle.asn1.x509; + +import java.util.Enumeration; +import java.util.Hashtable; +import java.util.Vector; + +import org.spongycastle.asn1.ASN1Encodable; +import org.spongycastle.asn1.ASN1EncodableVector; +import org.spongycastle.asn1.ASN1Object; +import org.spongycastle.asn1.ASN1ObjectIdentifier; +import org.spongycastle.asn1.ASN1Primitive; +import org.spongycastle.asn1.ASN1Sequence; +import org.spongycastle.asn1.ASN1TaggedObject; +import org.spongycastle.asn1.DERSequence; + +public class Extensions + extends ASN1Object +{ + private Hashtable extensions = new Hashtable(); + private Vector ordering = new Vector(); + + public static Extensions getInstance( + ASN1TaggedObject obj, + boolean explicit) + { + return getInstance(ASN1Sequence.getInstance(obj, explicit)); + } + + public static Extensions getInstance( + Object obj) + { + if (obj instanceof Extensions) + { + return (Extensions)obj; + } + else if (obj != null) + { + return new Extensions(ASN1Sequence.getInstance(obj)); + } + + return null; + } + + /** + * Constructor from ASN1Sequence. + * <p/> + * the extensions are a list of constructed sequences, either with (OID, OctetString) or (OID, Boolean, OctetString) + */ + private Extensions( + ASN1Sequence seq) + { + Enumeration e = seq.getObjects(); + + while (e.hasMoreElements()) + { + Extension ext = Extension.getInstance(e.nextElement()); + + extensions.put(ext.getExtnId(), ext); + ordering.addElement(ext.getExtnId()); + } + } + + /** + * Base Constructor + * + * @param extension a single extension. + */ + public Extensions( + Extension extension) + { + this.ordering.addElement(extension.getExtnId()); + this.extensions.put(extension.getExtnId(), extension); + } + + /** + * Base Constructor + * + * @param extensions an array of extensions. + */ + public Extensions( + Extension[] extensions) + { + for (int i = 0; i != extensions.length; i++) + { + Extension ext = extensions[i]; + + this.ordering.addElement(ext.getExtnId()); + this.extensions.put(ext.getExtnId(), ext); + } + } + + /** + * return an Enumeration of the extension field's object ids. + */ + public Enumeration oids() + { + return ordering.elements(); + } + + /** + * return the extension represented by the object identifier + * passed in. + * + * @return the extension if it's present, null otherwise. + */ + public Extension getExtension( + ASN1ObjectIdentifier oid) + { + return (Extension)extensions.get(oid); + } + + /** + * return the parsed value of the extension represented by the object identifier + * passed in. + * + * @return the parsed value of the extension if it's present, null otherwise. + */ + public ASN1Encodable getExtensionParsedValue(ASN1ObjectIdentifier oid) + { + Extension ext = this.getExtension(oid); + + if (ext != null) + { + return ext.getParsedValue(); + } + + return null; + } + + /** + * <pre> + * Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension + * + * Extension ::= SEQUENCE { + * extnId EXTENSION.&id ({ExtensionSet}), + * critical BOOLEAN DEFAULT FALSE, + * extnValue OCTET STRING } + * </pre> + */ + public ASN1Primitive toASN1Primitive() + { + ASN1EncodableVector vec = new ASN1EncodableVector(); + Enumeration e = ordering.elements(); + + while (e.hasMoreElements()) + { + ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)e.nextElement(); + Extension ext = (Extension)extensions.get(oid); + + vec.add(ext); + } + + return new DERSequence(vec); + } + + public boolean equivalent( + Extensions other) + { + if (extensions.size() != other.extensions.size()) + { + return false; + } + + Enumeration e1 = extensions.keys(); + + while (e1.hasMoreElements()) + { + Object key = e1.nextElement(); + + if (!extensions.get(key).equals(other.extensions.get(key))) + { + return false; + } + } + + return true; + } + + public ASN1ObjectIdentifier[] getExtensionOIDs() + { + return toOidArray(ordering); + } + + public ASN1ObjectIdentifier[] getNonCriticalExtensionOIDs() + { + return getExtensionOIDs(false); + } + + public ASN1ObjectIdentifier[] getCriticalExtensionOIDs() + { + return getExtensionOIDs(true); + } + + private ASN1ObjectIdentifier[] getExtensionOIDs(boolean isCritical) + { + Vector oidVec = new Vector(); + + for (int i = 0; i != ordering.size(); i++) + { + Object oid = ordering.elementAt(i); + + if (((Extension)extensions.get(oid)).isCritical() == isCritical) + { + oidVec.addElement(oid); + } + } + + return toOidArray(oidVec); + } + + private ASN1ObjectIdentifier[] toOidArray(Vector oidVec) + { + ASN1ObjectIdentifier[] oids = new ASN1ObjectIdentifier[oidVec.size()]; + + for (int i = 0; i != oids.length; i++) + { + oids[i] = (ASN1ObjectIdentifier)oidVec.elementAt(i); + } + return oids; + } +} |