1 files changed, 63 insertions, 0 deletions
diff --git a/include/hex.h b/include/hex.h
new file mode 100644
index 000000000..e3bfffbac
--- /dev/null
+++ b/include/hex.h
@@ -0,0 +1,63 @@
+/*************************************************
+* Hex Encoder/Decoder Header File                *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#ifndef BOTAN_HEX_H__
+#define BOTAN_HEX_H__
+
+#include <botan/filter.h>
+
+namespace Botan {
+
+/*************************************************
+* Hex Encoder                                    *
+*************************************************/
+class Hex_Encoder : public Filter
+   {
+   public:
+      enum Case { Uppercase, Lowercase };
+      static void encode(byte, byte[2], Case = Uppercase);
+
+      void write(const byte[], u32bit);
+      void end_msg();
+
+      Hex_Encoder(Case);
+      Hex_Encoder(bool = false, u32bit = 72, Case = Uppercase);
+   private:
+      void encode_and_send(const byte[], u32bit);
+      static const byte BIN_TO_HEX_UPPER[16];
+      static const byte BIN_TO_HEX_LOWER[16];
+
+      const Case casing;
+      const u32bit line_length;
+      SecureVector<byte> in, out;
+      u32bit position, counter;
+   };
+
+/*************************************************
+* Hex Decoder                                    *
+*************************************************/
+class Hex_Decoder : public Filter
+   {
+   public:
+      static byte decode(const byte[2]);
+      static bool is_valid(byte);
+
+      void write(const byte[], u32bit);
+      void end_msg();
+
+      Hex_Decoder(Decoder_Checking = NONE);
+   private:
+      void decode_and_send(const byte[], u32bit);
+      void handle_bad_char(byte);
+      static const byte HEX_TO_BIN[256];
+
+      const Decoder_Checking checking;
+      SecureVector<byte> in, out;
+      u32bit position;
+   };
+
+}
+
+#endif