1 files changed, 120 insertions, 0 deletions
diff --git a/crypto/src/util/encoders/Base64.cs b/crypto/src/util/encoders/Base64.cs
new file mode 100644
index 000000000..ccecd8dc2
--- /dev/null
+++ b/crypto/src/util/encoders/Base64.cs
@@ -0,0 +1,120 @@
+using System;
+using System.IO;
+using System.Text;
+
+namespace Org.BouncyCastle.Utilities.Encoders
+{
+    public sealed class Base64
+    {
+        private Base64()
+        {
+        }
+
+        public static string ToBase64String(
+            byte[] data)
+        {
+            return Convert.ToBase64String(data, 0, data.Length);
+        }
+
+        public static string ToBase64String(
+            byte[] data,
+            int off,
+            int length)
+        {
+            return Convert.ToBase64String(data, off, length);
+        }
+
+        /**
+         * encode the input data producing a base 64 encoded byte array.
+         *
+         * @return a byte array containing the base 64 encoded data.
+         */
+        public static byte[] Encode(
+            byte[] data)
+        {
+            return Encode(data, 0, data.Length);
+        }
+
+        /**
+         * encode the input data producing a base 64 encoded byte array.
+         *
+         * @return a byte array containing the base 64 encoded data.
+         */
+        public static byte[] Encode(
+            byte[] data,
+            int off,
+            int length)
+        {
+            string s = Convert.ToBase64String(data, off, length);
+            return Strings.ToAsciiByteArray(s);
+        }
+
+        /**
+         * Encode the byte data to base 64 writing it to the given output stream.
+         *
+         * @return the number of bytes produced.
+         */
+        public static int Encode(
+            byte[]	data,
+            Stream	outStream)
+        {
+            byte[] encoded = Encode(data);
+            outStream.Write(encoded, 0, encoded.Length);
+            return encoded.Length;
+        }
+
+        /**
+         * Encode the byte data to base 64 writing it to the given output stream.
+         *
+         * @return the number of bytes produced.
+         */
+        public static int Encode(
+            byte[]	data,
+            int		off,
+            int		length,
+            Stream	outStream)
+        {
+            byte[] encoded = Encode(data, off, length);
+            outStream.Write(encoded, 0, encoded.Length);
+            return encoded.Length;
+        }
+
+        /**
+         * decode the base 64 encoded input data. It is assumed the input data is valid.
+         *
+         * @return a byte array representing the decoded data.
+         */
+        public static byte[] Decode(
+            byte[] data)
+        {
+            string s = Strings.FromAsciiByteArray(data);
+            return Convert.FromBase64String(s);
+        }
+
+        /**
+         * decode the base 64 encoded string data - whitespace will be ignored.
+         *
+         * @return a byte array representing the decoded data.
+         */
+        public static byte[] Decode(
+            string data)
+        {
+            return Convert.FromBase64String(data);
+        }
+
+        /**
+         * decode the base 64 encoded string data writing it to the given output stream,
+         * whitespace characters will be ignored.
+         *
+         * @return the number of bytes produced.
+         */
+        public static int Decode(
+            string	data,
+            Stream	outStream)
+        {
+            byte[] decoded = Decode(data);
+            outStream.Write(decoded, 0, decoded.Length);
+            return decoded.Length;
+        }
+    }
+}