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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Cmp
{
public class PbmParameter
: Asn1Encodable
{
private Asn1OctetString salt;
private AlgorithmIdentifier owf;
private DerInteger iterationCount;
private AlgorithmIdentifier mac;
private PbmParameter(Asn1Sequence seq)
{
salt = Asn1OctetString.GetInstance(seq[0]);
owf = AlgorithmIdentifier.GetInstance(seq[1]);
iterationCount = DerInteger.GetInstance(seq[2]);
mac = AlgorithmIdentifier.GetInstance(seq[3]);
}
public static PbmParameter GetInstance(object obj)
{
if (obj is PbmParameter)
return (PbmParameter)obj;
if (obj is Asn1Sequence)
return new PbmParameter((Asn1Sequence)obj);
throw new ArgumentException("Invalid object: " + obj.GetType().Name, "obj");
}
public PbmParameter(
byte[] salt,
AlgorithmIdentifier owf,
int iterationCount,
AlgorithmIdentifier mac)
: this(new DerOctetString(salt), owf, new DerInteger(iterationCount), mac)
{
}
public PbmParameter(
Asn1OctetString salt,
AlgorithmIdentifier owf,
DerInteger iterationCount,
AlgorithmIdentifier mac)
{
this.salt = salt;
this.owf = owf;
this.iterationCount = iterationCount;
this.mac = mac;
}
public virtual Asn1OctetString Salt
{
get { return salt; }
}
public virtual AlgorithmIdentifier Owf
{
get { return owf; }
}
public virtual DerInteger IterationCount
{
get { return iterationCount; }
}
public virtual AlgorithmIdentifier Mac
{
get { return mac; }
}
/**
* <pre>
* PbmParameter ::= SEQUENCE {
* salt OCTET STRING,
* -- note: implementations MAY wish to limit acceptable sizes
* -- of this string to values appropriate for their environment
* -- in order to reduce the risk of denial-of-service attacks
* owf AlgorithmIdentifier,
* -- AlgId for a One-Way Function (SHA-1 recommended)
* iterationCount INTEGER,
* -- number of times the OWF is applied
* -- note: implementations MAY wish to limit acceptable sizes
* -- of this integer to values appropriate for their environment
* -- in order to reduce the risk of denial-of-service attacks
* mac AlgorithmIdentifier
* -- the MAC AlgId (e.g., DES-MAC, Triple-DES-MAC [PKCS11],
* } -- or HMAC [RFC2104, RFC2202])
* </pre>
* @return a basic ASN.1 object representation.
*/
public override Asn1Object ToAsn1Object()
{
return new DerSequence(salt, owf, iterationCount, mac);
}
}
}
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