| package org.bouncycastle.asn1.pkcs; |
| |
| import java.math.BigInteger; |
| import java.util.Enumeration; |
| |
| import org.bouncycastle.asn1.ASN1Encodable; |
| import org.bouncycastle.asn1.ASN1EncodableVector; |
| import org.bouncycastle.asn1.ASN1OctetString; |
| import org.bouncycastle.asn1.ASN1Sequence; |
| import org.bouncycastle.asn1.DERInteger; |
| import org.bouncycastle.asn1.DERObject; |
| import org.bouncycastle.asn1.DEROctetString; |
| import org.bouncycastle.asn1.DERSequence; |
| |
| public class PBKDF2Params |
| extends ASN1Encodable |
| { |
| ASN1OctetString octStr; |
| DERInteger iterationCount; |
| DERInteger keyLength; |
| |
| public static PBKDF2Params getInstance( |
| Object obj) |
| { |
| if (obj instanceof PBKDF2Params) |
| { |
| return (PBKDF2Params)obj; |
| } |
| |
| if (obj instanceof ASN1Sequence) |
| { |
| return new PBKDF2Params((ASN1Sequence)obj); |
| } |
| |
| throw new IllegalArgumentException("unknown object in factory: " + obj.getClass().getName()); |
| } |
| |
| public PBKDF2Params( |
| byte[] salt, |
| int iterationCount) |
| { |
| this.octStr = new DEROctetString(salt); |
| this.iterationCount = new DERInteger(iterationCount); |
| } |
| |
| public PBKDF2Params( |
| ASN1Sequence seq) |
| { |
| Enumeration e = seq.getObjects(); |
| |
| octStr = (ASN1OctetString)e.nextElement(); |
| iterationCount = (DERInteger)e.nextElement(); |
| |
| if (e.hasMoreElements()) |
| { |
| keyLength = (DERInteger)e.nextElement(); |
| } |
| else |
| { |
| keyLength = null; |
| } |
| } |
| |
| public byte[] getSalt() |
| { |
| return octStr.getOctets(); |
| } |
| |
| public BigInteger getIterationCount() |
| { |
| return iterationCount.getValue(); |
| } |
| |
| public BigInteger getKeyLength() |
| { |
| if (keyLength != null) |
| { |
| return keyLength.getValue(); |
| } |
| |
| return null; |
| } |
| |
| public DERObject toASN1Object() |
| { |
| ASN1EncodableVector v = new ASN1EncodableVector(); |
| |
| v.add(octStr); |
| v.add(iterationCount); |
| |
| if (keyLength != null) |
| { |
| v.add(keyLength); |
| } |
| |
| return new DERSequence(v); |
| } |
| } |