Initial Commit

iTechSharp/srcbc/tsp/TimeStampRequestGenerator.cs

@@ -0,0 +1,99 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Tsp;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Tsp
+{
+	/**
+	 * Generator for RFC 3161 Time Stamp Request objects.
+	 */
+	public class TimeStampRequestGenerator
+	{
+		private DerObjectIdentifier reqPolicy;
+
+		private DerBoolean certReq;
+
+		private Hashtable	extensions = new Hashtable();
+		private ArrayList	extOrdering = new ArrayList();
+
+		public void SetReqPolicy(
+			string reqPolicy)
+		{
+			this.reqPolicy = new DerObjectIdentifier(reqPolicy);
+		}
+
+		public void SetCertReq(
+			bool certReq)
+		{
+			this.certReq = DerBoolean.GetInstance(certReq);
+		}
+
+		/**
+		 * add a given extension field for the standard extensions tag (tag 3)
+		 * @throws IOException
+		 */
+		public void AddExtension(
+			string			oid,
+			bool			critical,
+			Asn1Encodable	value)
+		{
+			this.AddExtension(oid, critical, value.GetEncoded());
+		}
+
+		/**
+		* add a given extension field for the standard extensions tag
+		* The value parameter becomes the contents of the octet string associated
+		* with the extension.
+		*/
+		public void AddExtension(
+			string	oid,
+			bool	critical,
+			byte[]	value)
+		{
+			DerObjectIdentifier derOid = new DerObjectIdentifier(oid);
+			extensions[derOid] = new X509Extension(critical, new DerOctetString(value));
+			extOrdering.Add(derOid);
+		}
+
+		public TimeStampRequest Generate(
+			string	digestAlgorithm,
+			byte[]	digest)
+		{
+			return this.Generate(digestAlgorithm, digest, null);
+		}
+
+		public TimeStampRequest Generate(
+			string		digestAlgorithmOid,
+			byte[]		digest,
+			BigInteger	nonce)
+		{
+			if (digestAlgorithmOid == null)
+			{
+				throw new ArgumentException("No digest algorithm specified");
+			}
+
+			DerObjectIdentifier digestAlgOid = new DerObjectIdentifier(digestAlgorithmOid);
+
+			AlgorithmIdentifier algID = new AlgorithmIdentifier(digestAlgOid, DerNull.Instance);
+			MessageImprint messageImprint = new MessageImprint(algID, digest);
+
+			X509Extensions  ext = null;
+
+			if (extOrdering.Count != 0)
+			{
+				ext = new X509Extensions(extOrdering, extensions);
+			}
+
+			DerInteger derNonce = nonce == null
+				?	null
+				:	new DerInteger(nonce);
+
+			return new TimeStampRequest(
+				new TimeStampReq(messageImprint, reqPolicy, derNonce, certReq, ext));
+		}
+	}
+}