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using System;
namespace Org.BouncyCastle.Asn1.CryptoPro
{
public class Gost28147Parameters
: Asn1Encodable
{
public static Gost28147Parameters GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is Gost28147Parameters gost28147Parameters)
return gost28147Parameters;
return new Gost28147Parameters(Asn1Sequence.GetInstance(obj));
}
public static Gost28147Parameters GetInstance(Asn1TaggedObject obj, bool explicitly) =>
new Gost28147Parameters(Asn1Sequence.GetInstance(obj, explicitly));
public static Gost28147Parameters GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
new Gost28147Parameters(Asn1Sequence.GetTagged(taggedObject, declaredExplicit));
private readonly Asn1OctetString m_iv;
private readonly DerObjectIdentifier m_encryptionParamSet;
private Gost28147Parameters(Asn1Sequence seq)
{
int count = seq.Count;
if (count != 2)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
// TODO Validate length of 8?
m_iv = Asn1OctetString.GetInstance(seq[0]);
m_encryptionParamSet = DerObjectIdentifier.GetInstance(seq[1]);
}
public Gost28147Parameters(Asn1OctetString iv, DerObjectIdentifier encryptionParamSet)
{
m_iv = iv ?? throw new ArgumentNullException(nameof(iv));
m_encryptionParamSet = encryptionParamSet ?? throw new ArgumentNullException(nameof(encryptionParamSet));
}
public Asn1OctetString IV => m_iv;
public DerObjectIdentifier EncryptionParamSet => m_encryptionParamSet;
/**
* <pre>
* Gost28147-89-Parameters ::=
* SEQUENCE {
* iv Gost28147-89-IV,
* encryptionParamSet OBJECT IDENTIFIER
* }
*
* Gost28147-89-IV ::= OCTET STRING (SIZE (8))
* </pre>
*/
public override Asn1Object ToAsn1Object() => new DerSequence(m_iv, m_encryptionParamSet);
}
}
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