[IRC-Dev CVS] [CVS] Module ircdh: Change committed

[Toni G. <zo...@us...>]

CVSROOT    : /cvsroot/irc-dev
Module     : ircdh
Commit time: 2002-12-01 00:35:34 UTC

Added files:
     include/ircd_tea.h ircd/ircd_tea.c

Log message:

Ops! Faltaban 2 archivos.

---------------------- diff included ----------------------
Index: ircdh/include/ircd_tea.h
diff -u /dev/null ircdh/include/ircd_tea.h:1.1
--- /dev/null	Sat Nov 30 16:35:34 2002
+++ ircdh/include/ircd_tea.h	Sat Nov 30 16:35:24 2002
@@ -0,0 +1,30 @@
+/*
+ * IRC - Internet Relay Chat, ircd/ircd_tea.h
+ * Copyright (C) 1999 IRC-Hispano.org - ESNET - jcea & savage
+ * 
+ * See file AUTHORS in IRC package for additional names of
+ * the programmers.
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 1, or (at your option)
+ * any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 
+ * $Id: ircd_tea.h,v 1.1 2002/12/01 00:35:24 zolty Exp $
+ */
+#ifndef INCLUDED_ircd_tea_h
+#define INCLUDED_ircd_tea_h
+
+extern void ircd_tea(unsigned int v[], unsigned int k[], unsigned int x[]);
+extern void ircd_untea(unsigned int v[], unsigned int k[], unsigned int x[]);
+
+#endif /* INCLUDED_ircd_tea_h */
Index: ircdh/ircd/ircd_tea.c
diff -u /dev/null ircdh/ircd/ircd_tea.c:1.1
--- /dev/null	Sat Nov 30 16:35:34 2002
+++ ircdh/ircd/ircd_tea.c	Sat Nov 30 16:35:24 2002
@@ -0,0 +1,86 @@
+/*
+ * IRC - Internet Relay Chat, ircd/ircd_tea.c
+ * Copyright (C) 1999 IRC-Hispano.org - ESNET - jcea & savage
+ *
+ * See file AUTHORS in IRC package for additional names of
+ * the programmers.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 1, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: ircd_tea.c,v 1.1 2002/12/01 00:35:24 zolty Exp $
+ */
+
+
+/*
+ * ircd_tea(cifrado)
+ *
+ * Cifra 64 bits de datos, usando clave de 64 bits (los 64 bits superiores son cero)
+ * Se cifra v[0]^x[0], v[1]^x[1], para poder hacer CBC facilmente.
+ *
+ */
+void ircd_tea(unsigned int v[], unsigned int k[], unsigned int x[])
+{
+  unsigned int y = v[0] ^ x[0];
+  unsigned int z = v[1] ^ x[1];
+  unsigned int a = k[0];
+  unsigned int b = k[1];
+  unsigned int c = 0;
+  unsigned int d = 0;
+  unsigned int n = 32;
+  unsigned int sum = 0;
+  unsigned int delta = 0x9E3779B9;
+
+  while (n-- > 0)
+  {
+    sum += delta;
+    y += ((z << 4) + a) ^ (z + sum) ^ ((z >> 5) + b);
+    z += ((y << 4) + c) ^ (y + sum) ^ ((y >> 5) + d);
+  }
+
+  x[0] = y;
+  x[1] = z;
+}
+
+/*
+ * ircd_untea(descifrado)
+ * 
+ * Cifra 64 bits de datos, usando clave de 64 bits (los 64 bits superiores son cero)
+ * Se cifra v[0]^x[0], v[1]^x[1], para poder hacer CBC facilmente.
+ * 
+ */
+void ircd_untea(unsigned int v[], unsigned int k[], unsigned int x[])
+{
+  unsigned int y = v[0];
+  unsigned int z = v[1];
+  unsigned int a = k[0];
+  unsigned int b = k[1];
+  unsigned int c = 0;
+  unsigned int d = 0;
+  unsigned int n = 32;
+  unsigned int sum = 0xC6EF3720;
+  unsigned int delta = 0x9E3779B9;
+
+  /* sum = delta << 5, in general sum = delta * n */
+
+  while (n-- > 0)
+  {
+    z -= ((y << 4) + c) ^ (y + sum) ^ ((y >> 5) + d);
+    y -= ((z << 4) + a) ^ (z + sum) ^ ((z >> 5) + b);
+    sum -= delta;
+  }
+
+  x[0] = y;
+  x[1] = z;
+}
----------------------- End of diff -----------------------