1 files changed, 72 insertions, 0 deletions
diff --git a/src/modes/eax/eax.h b/src/modes/eax/eax.h
new file mode 100644
index 000000000..676e5334e
--- /dev/null
+++ b/src/modes/eax/eax.h
@@ -0,0 +1,72 @@
+/*************************************************
+* EAX Mode Header File                           *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#ifndef BOTAN_EAX_H__
+#define BOTAN_EAX_H__
+
+#include <botan/basefilt.h>
+
+namespace Botan {
+
+/*************************************************
+* EAX Base Class                                 *
+*************************************************/
+class BOTAN_DLL EAX_Base : public Keyed_Filter
+   {
+   public:
+      void set_key(const SymmetricKey&);
+      void set_iv(const InitializationVector&);
+      void set_header(const byte[], u32bit);
+      std::string name() const;
+
+      bool valid_keylength(u32bit) const;
+
+      ~EAX_Base() { delete cipher; delete mac; }
+   protected:
+      EAX_Base(const std::string&, u32bit);
+      void start_msg();
+      void increment_counter();
+
+      const u32bit TAG_SIZE, BLOCK_SIZE;
+      BlockCipher* cipher;
+      MessageAuthenticationCode* mac;
+      SecureVector<byte> nonce_mac, header_mac, state, buffer;
+      u32bit position;
+   };
+
+/*************************************************
+* EAX Encryption                                 *
+*************************************************/
+class BOTAN_DLL EAX_Encryption : public EAX_Base
+   {
+   public:
+      EAX_Encryption(const std::string&, u32bit = 0);
+      EAX_Encryption(const std::string&, const SymmetricKey&,
+                     const InitializationVector&, u32bit = 0);
+   private:
+      void write(const byte[], u32bit);
+      void end_msg();
+   };
+
+/*************************************************
+* EAX Decryption                                 *
+*************************************************/
+class BOTAN_DLL EAX_Decryption : public EAX_Base
+   {
+   public:
+      EAX_Decryption(const std::string&, u32bit = 0);
+      EAX_Decryption(const std::string&, const SymmetricKey&,
+                     const InitializationVector&, u32bit = 0);
+   private:
+      void write(const byte[], u32bit);
+      void do_write(const byte[], u32bit);
+      void end_msg();
+      SecureVector<byte> queue;
+      u32bit queue_start, queue_end;
+   };
+
+}
+
+#endif