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