1 files changed, 90 insertions, 0 deletions
diff --git a/botan/build/botan/hex.h b/botan/build/botan/hex.h
new file mode 100644
index 0000000..035bf4e
--- /dev/null
+++ b/botan/build/botan/hex.h
@@ -0,0 +1,90 @@
+/*
+* Hex Encoder/Decoder
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_HEX_H__
+#define BOTAN_HEX_H__
+
+#include <botan/filter.h>
+
+namespace Botan {
+
+/**
+* This class represents a hex encoder. It encodes byte arrays to hex strings.
+*/
+class BOTAN_DLL Hex_Encoder : public Filter
+   {
+   public:
+      /**
+      * Whether to use uppercase or lowercase letters for the encoded string.
+      */
+      enum Case { Uppercase, Lowercase };
+
+      /**
+        Encode a single byte into two hex characters
+      */
+      static void encode(byte in, byte out[2], Case the_case = Uppercase);
+
+      void write(const byte in[], u32bit length);
+      void end_msg();
+
+      /**
+      * Create a hex encoder.
+      * @param the_case the case to use in the encoded strings.
+      */
+      Hex_Encoder(Case the_case);
+
+      /**
+      * Create a hex encoder.
+      * @param newlines should newlines be used
+      * @param line_length if newlines are used, how long are lines
+      * @param the_case the case to use in the encoded strings
+      */
+      Hex_Encoder(bool newlines = false,
+                  u32bit line_length = 72,
+                  Case the_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;
+   };
+
+/**
+* This class represents a hex decoder. It converts hex strings to byte arrays.
+*/
+class BOTAN_DLL Hex_Decoder : public Filter
+   {
+   public:
+      static byte decode(const byte[2]);
+      static bool is_valid(byte);
+
+      void write(const byte[], u32bit);
+      void end_msg();
+
+      /**
+      * Construct a Hex Decoder using the specified
+      * character checking.
+      * @param checking the checking to use during decoding.
+      */
+      Hex_Decoder(Decoder_Checking 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