Initial Commit

iTechSharp/srcbc/tsp/TimeStampRequest.cs

@@ -0,0 +1,179 @@
+using System;
+using System.Collections;
+using System.IO;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Cmp;
+using Org.BouncyCastle.Asn1.Tsp;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Security;
+using Org.BouncyCastle.X509;
+
+namespace Org.BouncyCastle.Tsp
+{
+	/**
+	 * Base class for an RFC 3161 Time Stamp Request.
+	 */
+	public class TimeStampRequest
+		: X509ExtensionBase
+	{
+		private TimeStampReq req;
+
+		public TimeStampRequest(
+			TimeStampReq req)
+		{
+			this.req = req;
+		}
+
+		/**
+		* Create a TimeStampRequest from the past in byte array.
+		*
+		* @param req byte array containing the request.
+		* @throws IOException if the request is malformed.
+		*/
+		public TimeStampRequest(
+			byte[] req)
+			: this(new Asn1InputStream(req))
+		{
+		}
+
+		/**
+		* Create a TimeStampRequest from the past in input stream.
+		*
+		* @param in input stream containing the request.
+		* @throws IOException if the request is malformed.
+		*/
+		public TimeStampRequest(
+			Stream input)
+			: this(new Asn1InputStream(input))
+		{
+		}
+
+		private TimeStampRequest(
+			Asn1InputStream str)
+		{
+			try
+			{
+				this.req = TimeStampReq.GetInstance(str.ReadObject());
+			}
+			catch (InvalidCastException e)
+			{
+				throw new IOException("malformed request: " + e);
+			}
+			catch (ArgumentException e)
+			{
+				throw new IOException("malformed request: " + e);
+			}
+		}
+
+		public int Version
+		{
+			get { return req.Version.Value.IntValue; }
+		}
+
+		public string MessageImprintAlgOid
+		{
+			get { return req.MessageImprint.HashAlgorithm.ObjectID.Id; }
+		}
+
+		public byte[] GetMessageImprintDigest()
+		{
+			return req.MessageImprint.GetHashedMessage();
+		}
+
+		public string ReqPolicy
+		{
+			get
+			{
+				return req.ReqPolicy == null
+					?	null
+					:	req.ReqPolicy.Id;
+			}
+		}
+
+		public BigInteger Nonce
+		{
+			get
+			{
+				return req.Nonce == null
+					?	null
+					:	req.Nonce.Value;
+			}
+		}
+
+		public bool CertReq
+		{
+			get
+			{
+				return req.CertReq == null
+					?	false
+					:	req.CertReq.IsTrue;
+			}
+		}
+
+		/**
+		* Validate the timestamp request, checking the digest to see if it is of an
+		* accepted type and whether it is of the correct length for the algorithm specified.
+		*
+		* @param algorithms a set of string OIDS giving accepted algorithms.
+		* @param policies if non-null a set of policies we are willing to sign under.
+		* @param extensions if non-null a set of extensions we are willing to accept.
+		* @throws TspException if the request is invalid, or processing fails.
+		*/
+		public void Validate(
+			IList algorithms,
+			IList policies,
+			IList extensions)
+		{
+			if (!algorithms.Contains(this.MessageImprintAlgOid))
+			{
+				throw new TspValidationException("request contains unknown algorithm.", PkiFailureInfo.BadAlg);
+			}
+
+			if (policies != null && this.ReqPolicy != null && !policies.Contains(this.ReqPolicy))
+			{
+				throw new TspValidationException("request contains unknown policy.", PkiFailureInfo.UnacceptedPolicy);
+			}
+
+			if (this.Extensions != null && extensions != null)
+			{
+				foreach (DerObjectIdentifier oid in this.Extensions.ExtensionOids)
+				{
+					if (!extensions.Contains(oid.Id))
+					{
+						throw new TspValidationException("request contains unknown extension.",
+							PkiFailureInfo.UnacceptedExtension);
+					}
+				}
+			}
+
+			int digestLength = TspUtil.GetDigestLength(this.MessageImprintAlgOid);
+
+			if (digestLength != this.GetMessageImprintDigest().Length)
+			{
+				throw new TspValidationException("imprint digest the wrong length.",
+					PkiFailureInfo.BadDataFormat);
+			}
+		}
+
+		/**
+		 * return the ASN.1 encoded representation of this object.
+		 */
+		public byte[] GetEncoded()
+		{
+			return req.GetEncoded();
+		}
+
+		internal X509Extensions Extensions
+		{
+			get { return req.Extensions; }
+		}
+
+		protected override X509Extensions GetX509Extensions()
+		{
+			return Extensions;
+		}
+	}
+}