1 files changed, 129 insertions, 0 deletions
diff --git a/crypto/src/asn1/x509/X509CertificateStructure.cs b/crypto/src/asn1/x509/X509CertificateStructure.cs
new file mode 100644
index 000000000..e50d3563b
--- /dev/null
+++ b/crypto/src/asn1/x509/X509CertificateStructure.cs
@@ -0,0 +1,129 @@
+using System;
+
+using Org.BouncyCastle.Asn1.Pkcs;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+    /**
+     * an X509Certificate structure.
+     * <pre>
+     *  Certificate ::= Sequence {
+     *      tbsCertificate          TbsCertificate,
+     *      signatureAlgorithm      AlgorithmIdentifier,
+     *      signature               BIT STRING
+     *  }
+     * </pre>
+     */
+    public class X509CertificateStructure
+        : Asn1Encodable
+    {
+        private readonly TbsCertificateStructure	tbsCert;
+        private readonly AlgorithmIdentifier		sigAlgID;
+        private readonly DerBitString				sig;
+
+		public static X509CertificateStructure GetInstance(
+            Asn1TaggedObject	obj,
+            bool				explicitly)
+        {
+            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+        }
+
+		public static X509CertificateStructure GetInstance(
+            object obj)
+        {
+            if (obj is X509CertificateStructure)
+                return (X509CertificateStructure)obj;
+
+			if (obj != null)
+				return new X509CertificateStructure(Asn1Sequence.GetInstance(obj));
+
+			return null;
+        }
+
+		public X509CertificateStructure(
+			TbsCertificateStructure	tbsCert,
+			AlgorithmIdentifier		sigAlgID,
+			DerBitString			sig)
+		{
+			if (tbsCert == null)
+				throw new ArgumentNullException("tbsCert");
+			if (sigAlgID == null)
+				throw new ArgumentNullException("sigAlgID");
+			if (sig == null)
+				throw new ArgumentNullException("sig");
+
+			this.tbsCert = tbsCert;
+			this.sigAlgID = sigAlgID;
+			this.sig = sig;
+		}
+
+		private X509CertificateStructure(
+            Asn1Sequence seq)
+        {
+			if (seq.Count != 3)
+				throw new ArgumentException("sequence wrong size for a certificate", "seq");
+
+			//
+            // correct x509 certficate
+            //
+			tbsCert = TbsCertificateStructure.GetInstance(seq[0]);
+			sigAlgID = AlgorithmIdentifier.GetInstance(seq[1]);
+			sig = DerBitString.GetInstance(seq[2]);
+        }
+
+		public TbsCertificateStructure TbsCertificate
+        {
+			get { return tbsCert; }
+        }
+
+		public int Version
+        {
+            get { return tbsCert.Version; }
+        }
+
+		public DerInteger SerialNumber
+        {
+            get { return tbsCert.SerialNumber; }
+        }
+
+		public X509Name Issuer
+        {
+            get { return tbsCert.Issuer; }
+        }
+
+		public Time StartDate
+        {
+            get { return tbsCert.StartDate; }
+        }
+
+		public Time EndDate
+        {
+            get { return tbsCert.EndDate; }
+        }
+
+		public X509Name Subject
+        {
+            get { return tbsCert.Subject; }
+        }
+
+		public SubjectPublicKeyInfo SubjectPublicKeyInfo
+        {
+            get { return tbsCert.SubjectPublicKeyInfo; }
+        }
+
+		public AlgorithmIdentifier SignatureAlgorithm
+        {
+            get { return sigAlgID; }
+        }
+
+		public DerBitString Signature
+        {
+            get { return sig; }
+        }
+
+		public override Asn1Object ToAsn1Object()
+        {
+			return new DerSequence(tbsCert, sigAlgID, sig);
+        }
+	}
+}