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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Cmp
{
/**
* 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])
*/
public class PbmParameter
: Asn1Encodable
{
public static PbmParameter GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is PbmParameter pbmParameter)
return pbmParameter;
return new PbmParameter(Asn1Sequence.GetInstance(obj));
}
public static PbmParameter GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
return new PbmParameter(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
}
private readonly Asn1OctetString m_salt;
private readonly AlgorithmIdentifier m_owf;
private readonly DerInteger m_iterationCount;
private readonly AlgorithmIdentifier m_mac;
private PbmParameter(Asn1Sequence seq)
{
int count = seq.Count;
if (count != 4)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_salt = Asn1OctetString.GetInstance(seq[0]);
m_owf = AlgorithmIdentifier.GetInstance(seq[1]);
m_iterationCount = DerInteger.GetInstance(seq[2]);
m_mac = AlgorithmIdentifier.GetInstance(seq[3]);
}
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)
{
m_salt = salt ?? throw new ArgumentNullException(nameof(salt));
m_owf = owf ?? throw new ArgumentNullException(nameof(owf));
m_iterationCount = iterationCount ?? throw new ArgumentNullException(nameof(iterationCount));
m_mac = mac ?? throw new ArgumentNullException(nameof(mac));
}
public virtual DerInteger IterationCount => m_iterationCount;
public virtual AlgorithmIdentifier Mac => m_mac;
public virtual AlgorithmIdentifier Owf => m_owf;
public virtual Asn1OctetString Salt => m_salt;
/**
* <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() => new DerSequence(m_salt, m_owf, m_iterationCount, m_mac);
}
}
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