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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 and up.
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package org.bouncycastle.asn1.cryptopro;
import java.util.Enumeration;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.util.Arrays;
/**
* ASN.1 algorithm identifier parameters for GOST-28147
*/
public class GOST28147Parameters
extends ASN1Object
{
private ASN1OctetString iv;
private ASN1ObjectIdentifier paramSet;
public static GOST28147Parameters getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(ASN1Sequence.getInstance(obj, explicit));
}
public static GOST28147Parameters getInstance(
Object obj)
{
if (obj instanceof GOST28147Parameters)
{
return (GOST28147Parameters)obj;
}
if (obj != null)
{
return new GOST28147Parameters(ASN1Sequence.getInstance(obj));
}
return null;
}
public GOST28147Parameters(
byte[] iv,
ASN1ObjectIdentifier paramSet)
{
this.iv = new DEROctetString(iv);
this.paramSet = paramSet;
}
private GOST28147Parameters(
ASN1Sequence seq)
{
Enumeration e = seq.getObjects();
iv = (ASN1OctetString)e.nextElement();
paramSet = (ASN1ObjectIdentifier)e.nextElement();
}
/**
*
* Gost28147-89-Parameters ::=
* SEQUENCE {
* iv Gost28147-89-IV,
* encryptionParamSet OBJECT IDENTIFIER
* }
*
* Gost28147-89-IV ::= OCTET STRING (SIZE (8))
*
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector(2);
v.add(iv);
v.add(paramSet);
return new DERSequence(v);
}
/**
* Return the OID representing the sBox to use.
*
* @return the sBox OID.
*/
public ASN1ObjectIdentifier getEncryptionParamSet()
{
return paramSet;
}
/**
* Return the initialisation vector to use.
*
* @return the IV.
*/
public byte[] getIV()
{
return Arrays.clone(iv.getOctets());
}
}
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