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using System;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Tsp
{
public class MessageImprint
: Asn1Encodable
{
private readonly AlgorithmIdentifier hashAlgorithm;
private readonly byte[] hashedMessage;
/**
* @param o
* @return a MessageImprint object.
*/
public static MessageImprint GetInstance(
object o)
{
if (o == null || o is MessageImprint)
{
return (MessageImprint) o;
}
if (o is Asn1Sequence)
{
return new MessageImprint((Asn1Sequence) o);
}
throw new ArgumentException(
"Unknown object in 'MessageImprint' factory: " + Platform.GetTypeName(o));
}
private MessageImprint(
Asn1Sequence seq)
{
if (seq.Count != 2)
throw new ArgumentException("Wrong number of elements in sequence", "seq");
this.hashAlgorithm = AlgorithmIdentifier.GetInstance(seq[0]);
this.hashedMessage = Asn1OctetString.GetInstance(seq[1]).GetOctets();
}
public MessageImprint(
AlgorithmIdentifier hashAlgorithm,
byte[] hashedMessage)
{
this.hashAlgorithm = hashAlgorithm;
this.hashedMessage = hashedMessage;
}
public AlgorithmIdentifier HashAlgorithm
{
get { return hashAlgorithm; }
}
public byte[] GetHashedMessage()
{
return hashedMessage;
}
/**
* <pre>
* MessageImprint ::= SEQUENCE {
* hashAlgorithm AlgorithmIdentifier,
* hashedMessage OCTET STRING }
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
return new DerSequence(hashAlgorithm, new DerOctetString(hashedMessage));
}
}
}
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