1 files changed, 74 insertions, 0 deletions
diff --git a/Crypto/src/asn1/tsp/MessageImprint.cs b/Crypto/src/asn1/tsp/MessageImprint.cs
new file mode 100644
index 000000000..0933bae21
--- /dev/null
+++ b/Crypto/src/asn1/tsp/MessageImprint.cs
@@ -0,0 +1,74 @@
+using System;
+
+using Org.BouncyCastle.Asn1.X509;
+
+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: " + o.GetType().FullName);
+ }
+
+ 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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