init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Tsp/MessageImprint.cs

@@ -0,0 +1,53 @@
+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;
+
+	public AlgorithmIdentifier HashAlgorithm => hashAlgorithm;
+
+	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");
+		}
+		hashAlgorithm = AlgorithmIdentifier.GetInstance(seq[0]);
+		hashedMessage = Asn1OctetString.GetInstance(seq[1]).GetOctets();
+	}
+
+	public MessageImprint(AlgorithmIdentifier hashAlgorithm, byte[] hashedMessage)
+	{
+		this.hashAlgorithm = hashAlgorithm;
+		this.hashedMessage = hashedMessage;
+	}
+
+	public byte[] GetHashedMessage()
+	{
+		return hashedMessage;
+	}
+
+	public override Asn1Object ToAsn1Object()
+	{
+		return new DerSequence(hashAlgorithm, new DerOctetString(hashedMessage));
+	}
+}