Import AES-OCB3 implementation and driver code

crypto.hpp

@@ -0,0 +1,65 @@
+#ifndef CRYPTO_HPP
+#define CRYPTO_HPP
+
+#include "ae.hpp"
+#include <string>
+
+using namespace std;
+
+class CryptoException {
+public:
+  string text;
+  CryptoException( string s_text ) : text( s_text ) {};
+};
+
+class Base64Key {
+private:
+  unsigned char key[ 16 ];
+
+public:
+  Base64Key(); /* random key */
+  Base64Key( string printable_key );
+  string printable_key( void );
+  unsigned char *data( void ) { return key; }
+};
+
+class Nonce {
+private:
+  char bytes[ 12 ];
+
+public:
+  Nonce( uint64_t val );
+  Nonce( char *s_bytes, size_t len );
+
+  string cpp_str( void ) { return string( (char *)( bytes + 4 ), 8 ); }
+  char *data( void ) { return bytes; }
+  uint64_t val( void );
+};
+
+class Message {
+public:
+  Nonce nonce;
+  string text;
+
+  Message( char *nonce_bytes, size_t nonce_len,
+	   char *text_bytes, size_t text_len );
+  Message( Nonce s_nonce, string s_text );
+};
+
+class Session {
+private:
+  Base64Key key;
+  ae_ctx *ctx;
+
+public:
+  Session( Base64Key s_key );
+  ~Session();
+
+  string encrypt( Message plaintext );
+  Message decrypt( string ciphertext );
+
+  Session( const Session & );
+  Session & operator=( const Session & );
+};
+
+#endif