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using System;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Math;
namespace Org.BouncyCastle.Asn1.Pkcs
{
public class MacData
: Asn1Encodable
{
internal DigestInfo digInfo;
internal byte[] salt;
internal BigInteger iterationCount;
public static MacData GetInstance(
object obj)
{
if (obj is MacData)
{
return (MacData) obj;
}
if (obj is Asn1Sequence)
{
return new MacData((Asn1Sequence) obj);
}
throw new ArgumentException("Unknown object in factory: " + obj.GetType().FullName, "obj");
}
private MacData(
Asn1Sequence seq)
{
this.digInfo = DigestInfo.GetInstance(seq[0]);
this.salt = ((Asn1OctetString) seq[1]).GetOctets();
if (seq.Count == 3)
{
this.iterationCount = ((DerInteger) seq[2]).Value;
}
else
{
this.iterationCount = BigInteger.One;
}
}
public MacData(
DigestInfo digInfo,
byte[] salt,
int iterationCount)
{
this.digInfo = digInfo;
this.salt = (byte[]) salt.Clone();
this.iterationCount = BigInteger.ValueOf(iterationCount);
}
public DigestInfo Mac
{
get { return digInfo; }
}
public byte[] GetSalt()
{
return (byte[]) salt.Clone();
}
public BigInteger IterationCount
{
get { return iterationCount; }
}
/**
* <pre>
* MacData ::= SEQUENCE {
* mac DigestInfo,
* macSalt OCTET STRING,
* iterations INTEGER DEFAULT 1
* -- Note: The default is for historic reasons and its use is deprecated. A
* -- higher value, like 1024 is recommended.
* </pre>
* @return the basic DERObject construction.
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(digInfo, new DerOctetString(salt));
if (!iterationCount.Equals(BigInteger.One))
{
v.Add(new DerInteger(iterationCount));
}
return new DerSequence(v);
}
}
}
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