Add BouncyCastle PCL files v1.7.0

1 files changed, 111 insertions, 0 deletions

diff --git a/Crypto/src/crypto/tls/Certificate.cs b/Crypto/src/crypto/tls/Certificate.cs
new file mode 100644

index 000000000..e4df041e2
--- /dev/null
+++ b/Crypto/src/crypto/tls/Certificate.cs
@@ -0,0 +1,111 @@
+using System;
+using System.Collections;
+using System.IO;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+	/**
+	* A representation for a certificate chain.
+	*/
+	public class Certificate
+	{
+		public static readonly Certificate EmptyChain = new Certificate(new X509CertificateStructure[0]);
+
+		/**
+		* The certificates.
+		*/
+		internal X509CertificateStructure[] certs;
+
+		/**
+		* Parse the ServerCertificate message.
+		*
+		* @param inStr The stream where to parse from.
+		* @return A Certificate object with the certs, the server has sended.
+		* @throws IOException If something goes wrong during parsing.
+		*/
+		internal static Certificate Parse(
+			Stream inStr)
+		{
+			int left = TlsUtilities.ReadUint24(inStr);
+			if (left == 0)
+			{
+				return EmptyChain;
+			}
+			IList tmp = Platform.CreateArrayList();
+			while (left > 0)
+			{
+				int size = TlsUtilities.ReadUint24(inStr);
+				left -= 3 + size;
+				byte[] buf = new byte[size];
+				TlsUtilities.ReadFully(buf, inStr);
+				MemoryStream bis = new MemoryStream(buf, false);
+				Asn1Object o = Asn1Object.FromStream(bis);
+				tmp.Add(X509CertificateStructure.GetInstance(o));
+				if (bis.Position < bis.Length)
+				{
+					throw new ArgumentException("Sorry, there is garbage data left after the certificate");
+				}
+			}
+            X509CertificateStructure[] certs = new X509CertificateStructure[tmp.Count];
+            for (int i = 0; i < tmp.Count; ++i)
+            {
+                certs[i] = (X509CertificateStructure)tmp[i];
+            }
+			return new Certificate(certs);
+		}
+
+		/**
+		 * Encodes version of the ClientCertificate message
+		 *
+		 * @param outStr stream to write the message to
+		 * @throws IOException If something goes wrong
+		 */
+		internal void Encode(
+			Stream outStr)
+		{
+			IList encCerts = Platform.CreateArrayList();
+			int totalSize = 0;
+			foreach (X509CertificateStructure cert in certs)
+			{
+				byte[] encCert = cert.GetEncoded(Asn1Encodable.Der);
+				encCerts.Add(encCert);
+				totalSize += encCert.Length + 3;
+			}
+
+			TlsUtilities.WriteUint24(totalSize, outStr);
+
+			foreach (byte[] encCert in encCerts)
+			{
+				TlsUtilities.WriteOpaque24(encCert, outStr);
+			}
+		}
+
+		/**
+		* Private constructor from a cert array.
+		*
+		* @param certs The certs the chain should contain.
+		*/
+		public Certificate(X509CertificateStructure[] certs)
+		{
+			if (certs == null)
+				throw new ArgumentNullException("certs");
+
+			this.certs = certs;
+		}
+
+		/// <returns>An array which contains the certs, this chain contains.</returns>
+		public X509CertificateStructure[] GetCerts()
+		{
+			return (X509CertificateStructure[]) certs.Clone();
+		}
+
+		public bool IsEmpty
+		{
+			get { return certs.Length == 0; }
+		}
+	}
+}