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using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Misc
{
public class Cast5CbcParameters
: Asn1Encodable
{
private readonly DerInteger keyLength;
private readonly Asn1OctetString iv;
public static Cast5CbcParameters GetInstance(
object o)
{
if (o is Cast5CbcParameters)
{
return (Cast5CbcParameters) o;
}
if (o is Asn1Sequence)
{
return new Cast5CbcParameters((Asn1Sequence) o);
}
throw new ArgumentException("unknown object in Cast5CbcParameters factory");
}
public Cast5CbcParameters(
byte[] iv,
int keyLength)
{
this.iv = new DerOctetString(iv);
this.keyLength = new DerInteger(keyLength);
}
private Cast5CbcParameters(
Asn1Sequence seq)
{
if (seq.Count != 2)
throw new ArgumentException("Wrong number of elements in sequence", "seq");
iv = (Asn1OctetString) seq[0];
keyLength = (DerInteger) seq[1];
}
public byte[] GetIV()
{
return Arrays.Clone(iv.GetOctets());
}
public int KeyLength
{
get { return keyLength.IntValueExact; }
}
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* cast5CBCParameters ::= Sequence {
* iv OCTET STRING DEFAULT 0,
* -- Initialization vector
* keyLength Integer
* -- Key length, in bits
* }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
return new DerSequence(iv, keyLength);
}
}
}
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