*** empty log message ***

1 files changed, 53 insertions, 0 deletions

diff --git a/include/sapphire.h b/include/sapphire.h
new file mode 100644
index 0000000..9e9f724
--- /dev/null
+++ b/include/sapphire.h
@@ -0,0 +1,53 @@
+/* sapphire.h -- Interface for the Saphire II stream cipher.
+
+   Dedicated to the Public Domain the author and inventor
+   (Michael Paul Johnson).  This code comes with no warranty.
+   Use it at your own risk.
+   Ported from the Pascal implementation of the Sapphire Stream
+   Cipher 9 December 1994.
+   Added hash-specific functions 27 December 1994.
+   Made index variable initialization key-dependent,
+   made the output function more resistant to cryptanalysis,
+   and renamed to Sapphire II Stream Cipher 2 January 1995.
+
+   unsigned char is assumed to be 8 bits.  If it is not, the
+   results of assignments need to be reduced to 8 bits with
+   & 0xFF or % 0x100, whichever is faster.
+*/  
+  
+#ifndef NULL
+#define NULL 0
+#endif	/*  */
+  class sapphire 
+{
+  
+    // These variables comprise the state of the state machine.
+  unsigned char cards[256];	// A permutation of 0-255.
+  unsigned char rotor,		// Index that rotates smoothly
+    ratchet,			// Index that moves erratically
+    avalanche,			// Index heavily data dependent
+    last_plain,			// Last plain text byte
+    last_cipher;		// Last cipher text byte
+  
+    // This function is used by initialize(), which is called by the
+    // constructor.
+  unsigned char keyrand (int limit, unsigned char *user_key,
+			  unsigned char keysize, unsigned char *rsum,
+unsigned *keypos); public:sapphire (unsigned char
+				      *key = NULL,	// Calls initialize if a real
+				      unsigned char keysize = 0);	// key is provided.  If none
+  // is provided, call initialize
+  // before encrypt or decrypt.
+  ~sapphire ();			// Destroy cipher state information.
+  void initialize (unsigned char *key,	// User key is used to set
+		   unsigned char keysize);	// up state information.
+  void hash_init (void);	// Set up default hash.
+  unsigned char encrypt (unsigned char b = 0);	// Encrypt byte
+  // or get a random byte.
+  unsigned char decrypt (unsigned char b);	// Decrypt byte.
+  void hash_final (unsigned char *hash,	// Copy hash value to hash
+		   unsigned char hashlength = 20);	// Hash length (16-32)
+  void burn (void);		// Destroy cipher state information.
+};
+
+