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using System;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
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)
{
return new MessageImprint(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
}
private readonly AlgorithmIdentifier m_hashAlgorithm;
private readonly byte[] m_hashedMessage;
private MessageImprint(Asn1Sequence seq)
{
if (seq.Count != 2)
throw new ArgumentException("Wrong number of elements in sequence", nameof(seq));
m_hashAlgorithm = AlgorithmIdentifier.GetInstance(seq[0]);
m_hashedMessage = Asn1OctetString.GetInstance(seq[1]).GetOctets();
}
public MessageImprint(AlgorithmIdentifier hashAlgorithm, byte[] hashedMessage)
{
m_hashAlgorithm = hashAlgorithm;
m_hashedMessage = hashedMessage;
}
public AlgorithmIdentifier HashAlgorithm => m_hashAlgorithm;
public byte[] GetHashedMessage() => m_hashedMessage;
/**
* <pre>
* MessageImprint ::= SEQUENCE {
* hashAlgorithm AlgorithmIdentifier,
* hashedMessage OCTET STRING }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
return new DerSequence(m_hashAlgorithm, new DerOctetString(m_hashedMessage));
}
}
}
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