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using System;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Tsp
{
public class MessageImprint
: Asn1Encodable
{
public static MessageImprint GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is MessageImprint messageImprint)
return messageImprint;
return new MessageImprint(Asn1Sequence.GetInstance(obj));
}
public static MessageImprint GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
new MessageImprint(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
public static MessageImprint GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
new MessageImprint(Asn1Sequence.GetTagged(taggedObject, declaredExplicit));
private readonly AlgorithmIdentifier m_hashAlgorithm;
private readonly Asn1OctetString m_hashedMessage;
private MessageImprint(Asn1Sequence seq)
{
int count = seq.Count;
if (count != 2)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_hashAlgorithm = AlgorithmIdentifier.GetInstance(seq[0]);
m_hashedMessage = Asn1OctetString.GetInstance(seq[1]);
}
public MessageImprint(AlgorithmIdentifier hashAlgorithm, byte[] hashedMessage)
{
m_hashAlgorithm = hashAlgorithm ?? throw new ArgumentNullException(nameof(hashAlgorithm));
m_hashedMessage = new DerOctetString(hashedMessage);
}
public AlgorithmIdentifier HashAlgorithm => m_hashAlgorithm;
public Asn1OctetString HashedMessage => m_hashedMessage;
public byte[] GetHashedMessage() => m_hashedMessage.GetOctets();
/**
* <pre>
* MessageImprint ::= SEQUENCE {
* hashAlgorithm AlgorithmIdentifier,
* hashedMessage OCTET STRING }
* </pre>
*/
public override Asn1Object ToAsn1Object() => new DerSequence(m_hashAlgorithm, m_hashedMessage);
}
}
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