/* -*-c-*-
*
- * $Id: rijndael-mktab.c,v 1.3 2000/10/14 17:13:19 mdw Exp $
+ * $Id: rijndael-mktab.c,v 1.4 2004/04/08 01:36:15 mdw Exp $
*
* Build precomputed tables for the Rijndael block cipher
*
* MA 02111-1307, USA.
*/
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: rijndael-mktab.c,v $
- * Revision 1.3 2000/10/14 17:13:19 mdw
- * Fix some compile errors.
- *
- * Revision 1.2 2000/06/18 23:12:15 mdw
- * Change typesetting of Galois Field names.
- *
- * Revision 1.1 2000/06/17 11:56:07 mdw
- * New cipher.
- *
- */
-
/*----- Header files ------------------------------------------------------*/
#include <assert.h>
a = s[i];
b = a << 1; if (b & 0x100) b ^= S_MOD;
c = a ^ b;
- w = (b << 0) | (a << 8) | (a << 16) | (c << 24);
+ w = (c << 0) | (a << 8) | (a << 16) | (b << 24);
t[0][i] = w;
- t[1][i] = ROL32(w, 8);
- t[2][i] = ROL32(w, 16);
- t[3][i] = ROL32(w, 24);
+ t[1][i] = ROR32(w, 8);
+ t[2][i] = ROR32(w, 16);
+ t[3][i] = ROR32(w, 24);
/* --- Build a backwards t-box entry --- */
b = mul(si[i], 0x09, S_MOD);
c = mul(si[i], 0x0d, S_MOD);
d = mul(si[i], 0x0b, S_MOD);
- w = (a << 0) | (b << 8) | (c << 16) | (d << 24);
+ w = (d << 0) | (c << 8) | (b << 16) | (a << 24);
ti[0][i] = w;
- ti[1][i] = ROL32(w, 8);
- ti[2][i] = ROL32(w, 16);
- ti[3][i] = ROL32(w, 24);
+ ti[1][i] = ROR32(w, 8);
+ ti[2][i] = ROR32(w, 16);
+ ti[3][i] = ROR32(w, 24);
}
}
b = mul(i, 0x09, S_MOD);
c = mul(i, 0x0d, S_MOD);
d = mul(i, 0x0b, S_MOD);
- w = (a << 0) | (b << 8) | (c << 16) | (d << 24);
+ w = (d << 0) | (c << 8) | (b << 16) | (a << 24);
u[0][i] = w;
- u[1][i] = ROL32(w, 8);
- u[2][i] = ROL32(w, 16);
- u[3][i] = ROL32(w, 24);
+ u[1][i] = ROR32(w, 8);
+ u[2][i] = ROR32(w, 16);
+ u[3][i] = ROR32(w, 24);
}
}