Initial Commit

iTechSharp/srcbc/asn1/x509/SubjectPublicKeyInfo.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Collections;
+using System.IO;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+    /**
+     * The object that contains the public key stored in a certficate.
+     * <p>
+     * The GetEncoded() method in the public keys in the JCE produces a DER
+     * encoded one of these.</p>
+     */
+    public class SubjectPublicKeyInfo
+        : Asn1Encodable
+    {
+        private readonly AlgorithmIdentifier	algID;
+        private readonly DerBitString			keyData;
+
+		public static SubjectPublicKeyInfo GetInstance(
+            Asn1TaggedObject	obj,
+            bool				explicitly)
+        {
+            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+        }
+
+		public static SubjectPublicKeyInfo GetInstance(
+            object obj)
+        {
+            if (obj is SubjectPublicKeyInfo)
+            {
+                return (SubjectPublicKeyInfo) obj;
+            }
+
+			if (obj is Asn1Sequence)
+            {
+                return new SubjectPublicKeyInfo((Asn1Sequence) obj);
+            }
+
+			throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
+        }
+
+		public SubjectPublicKeyInfo(
+            AlgorithmIdentifier	algID,
+            Asn1Encodable		publicKey)
+        {
+            this.keyData = new DerBitString(publicKey);
+            this.algID = algID;
+        }
+
+		public SubjectPublicKeyInfo(
+            AlgorithmIdentifier	algID,
+            byte[]				publicKey)
+        {
+            this.keyData = new DerBitString(publicKey);
+            this.algID = algID;
+        }
+
+		private SubjectPublicKeyInfo(
+            Asn1Sequence seq)
+        {
+			if (seq.Count != 2)
+				throw new ArgumentException("Bad sequence size: " + seq.Count, "seq");
+
+            this.algID = AlgorithmIdentifier.GetInstance(seq[0]);
+			this.keyData = DerBitString.GetInstance(seq[1]);
+		}
+
+		public AlgorithmIdentifier AlgorithmID
+        {
+			get { return algID; }
+        }
+
+		/**
+         * for when the public key is an encoded object - if the bitstring
+         * can't be decoded this routine raises an IOException.
+         *
+         * @exception IOException - if the bit string doesn't represent a Der
+         * encoded object.
+         */
+        public Asn1Object GetPublicKey()
+        {
+			return Asn1Object.FromByteArray(keyData.GetBytes());
+        }
+
+		/**
+         * for when the public key is raw bits...
+         */
+        public DerBitString PublicKeyData
+        {
+			get { return keyData; }
+        }
+
+		/**
+         * Produce an object suitable for an Asn1OutputStream.
+         * <pre>
+         * SubjectPublicKeyInfo ::= Sequence {
+         *                          algorithm AlgorithmIdentifier,
+         *                          publicKey BIT STRING }
+         * </pre>
+         */
+        public override Asn1Object ToAsn1Object()
+        {
+			return new DerSequence(algID, keyData);
+        }
+    }
+}