| package org.bouncycastle.asn1.x9; |
| |
| import java.util.Enumeration; |
| |
| import org.bouncycastle.asn1.ASN1EncodableVector; |
| import org.bouncycastle.asn1.ASN1Object; |
| import org.bouncycastle.asn1.ASN1OctetString; |
| import org.bouncycastle.asn1.ASN1Primitive; |
| import org.bouncycastle.asn1.ASN1Sequence; |
| import org.bouncycastle.asn1.ASN1TaggedObject; |
| import org.bouncycastle.asn1.DERSequence; |
| import org.bouncycastle.asn1.DERTaggedObject; |
| |
| /** |
| * ASN.1 def for Diffie-Hellman key exchange OtherInfo structure. See |
| * RFC 2631, or X9.42, for further details. |
| * <pre> |
| * OtherInfo ::= SEQUENCE { |
| * keyInfo KeySpecificInfo, |
| * partyAInfo [0] OCTET STRING OPTIONAL, |
| * suppPubInfo [2] OCTET STRING |
| * } |
| * </pre> |
| */ |
| public class OtherInfo |
| extends ASN1Object |
| { |
| private KeySpecificInfo keyInfo; |
| private ASN1OctetString partyAInfo; |
| private ASN1OctetString suppPubInfo; |
| |
| public OtherInfo( |
| KeySpecificInfo keyInfo, |
| ASN1OctetString partyAInfo, |
| ASN1OctetString suppPubInfo) |
| { |
| this.keyInfo = keyInfo; |
| this.partyAInfo = partyAInfo; |
| this.suppPubInfo = suppPubInfo; |
| } |
| |
| /** |
| * Return a OtherInfo object from the passed in object. |
| * |
| * @param obj an object for conversion or a byte[]. |
| * @return a OtherInfo |
| */ |
| public static OtherInfo getInstance(Object obj) |
| { |
| if (obj instanceof OtherInfo) |
| { |
| return (OtherInfo)obj; |
| } |
| else if (obj != null) |
| { |
| return new OtherInfo(ASN1Sequence.getInstance(obj)); |
| } |
| |
| return null; |
| } |
| |
| private OtherInfo( |
| ASN1Sequence seq) |
| { |
| Enumeration e = seq.getObjects(); |
| |
| keyInfo = KeySpecificInfo.getInstance(e.nextElement()); |
| |
| while (e.hasMoreElements()) |
| { |
| ASN1TaggedObject o = (ASN1TaggedObject)e.nextElement(); |
| |
| if (o.getTagNo() == 0) |
| { |
| partyAInfo = (ASN1OctetString)o.getObject(); |
| } |
| else if (o.getTagNo() == 2) |
| { |
| suppPubInfo = (ASN1OctetString)o.getObject(); |
| } |
| } |
| } |
| |
| /** |
| * Return the key specific info for the KEK/CEK. |
| * |
| * @return the key specific info. |
| */ |
| public KeySpecificInfo getKeyInfo() |
| { |
| return keyInfo; |
| } |
| |
| /** |
| * PartyA info for key deriviation. |
| * |
| * @return PartyA info. |
| */ |
| public ASN1OctetString getPartyAInfo() |
| { |
| return partyAInfo; |
| } |
| |
| /** |
| * The length of the KEK to be generated as a 4 byte big endian. |
| * |
| * @return KEK length as a 4 byte big endian in an octet string. |
| */ |
| public ASN1OctetString getSuppPubInfo() |
| { |
| return suppPubInfo; |
| } |
| |
| /** |
| * Return an ASN.1 primitive representation of this object. |
| * |
| * @return a DERSequence containing the OtherInfo values. |
| */ |
| public ASN1Primitive toASN1Primitive() |
| { |
| ASN1EncodableVector v = new ASN1EncodableVector(); |
| |
| v.add(keyInfo); |
| |
| if (partyAInfo != null) |
| { |
| v.add(new DERTaggedObject(0, partyAInfo)); |
| } |
| |
| v.add(new DERTaggedObject(2, suppPubInfo)); |
| |
| return new DERSequence(v); |
| } |
| } |