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using System;
namespace Org.BouncyCastle.Asn1.CryptoPro
{
public class Gost3410PublicKeyAlgParameters
: Asn1Encodable
{
public static Gost3410PublicKeyAlgParameters GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is Gost3410PublicKeyAlgParameters gost3410PublicKeyAlgParameters)
return gost3410PublicKeyAlgParameters;
return new Gost3410PublicKeyAlgParameters(Asn1Sequence.GetInstance(obj));
}
public static Gost3410PublicKeyAlgParameters GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
new Gost3410PublicKeyAlgParameters(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
public static Gost3410PublicKeyAlgParameters GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
new Gost3410PublicKeyAlgParameters(Asn1Sequence.GetTagged(taggedObject, declaredExplicit));
private readonly DerObjectIdentifier m_publicKeyParamSet;
private readonly DerObjectIdentifier m_digestParamSet;
private readonly DerObjectIdentifier m_encryptionParamSet;
private Gost3410PublicKeyAlgParameters(Asn1Sequence seq)
{
int count = seq.Count, pos = 0;
if (count < 2 || count > 3)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_publicKeyParamSet = DerObjectIdentifier.GetInstance(seq[pos++]);
m_digestParamSet = DerObjectIdentifier.GetInstance(seq[pos++]);
m_encryptionParamSet = Asn1Utilities.ReadOptional(seq, ref pos, DerObjectIdentifier.GetOptional);
if (pos != count)
throw new ArgumentException("Unexpected elements in sequence", nameof(seq));
}
public Gost3410PublicKeyAlgParameters(DerObjectIdentifier publicKeyParamSet, DerObjectIdentifier digestParamSet)
: this(publicKeyParamSet, digestParamSet, null)
{
}
public Gost3410PublicKeyAlgParameters(DerObjectIdentifier publicKeyParamSet, DerObjectIdentifier digestParamSet,
DerObjectIdentifier encryptionParamSet)
{
m_publicKeyParamSet = publicKeyParamSet ?? throw new ArgumentNullException(nameof(publicKeyParamSet));
m_digestParamSet = digestParamSet ?? throw new ArgumentNullException(nameof(digestParamSet));
m_encryptionParamSet = encryptionParamSet;
}
public DerObjectIdentifier PublicKeyParamSet => m_publicKeyParamSet;
public DerObjectIdentifier DigestParamSet => m_digestParamSet;
public DerObjectIdentifier EncryptionParamSet => m_encryptionParamSet;
public override Asn1Object ToAsn1Object()
{
return m_encryptionParamSet == null
? new DerSequence(m_publicKeyParamSet, m_digestParamSet)
: new DerSequence(m_publicKeyParamSet, m_digestParamSet, m_encryptionParamSet);
}
}
}
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