--- /dev/null
+/* -*-c-*-
+ *
+ * The Rijndael block cipher
+ *
+ * (c) 2000 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of Catacomb.
+ *
+ * Catacomb is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * Catacomb 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with Catacomb; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <assert.h>
+#include <stdio.h>
+
+#include <mLib/bits.h>
+
+#include "blkc.h"
+#include "gcipher.h"
+#include "rijndael.h"
+#include "rijndael-base.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @rijndael_init@ --- *
+ *
+ * Arguments: @rijndael_ctx *k@ = pointer to context to initialize
+ * @const void *buf@ = pointer to buffer of key material
+ * @size_t sz@ = size of the key material
+ *
+ * Returns: ---
+ *
+ * Use: Initializes a Rijndael context with a particular key. This
+ * implementation of Rijndael doesn't impose any particular
+ * limits on the key size except that it must be multiple of 4
+ * bytes long. 256 bits seems sensible, though.
+ */
+
+void rijndael_init(rijndael_ctx *k, const void *buf, size_t sz)
+{
+ rijndael_setup(k, RIJNDAEL_BLKSZ / 4, buf, sz);
+}
+
+/* --- @rijndael_eblk@, @rijndael_dblk@ --- *
+ *
+ * Arguments: @const rijndael_ctx *k@ = pointer to Rijndael context
+ * @const uint32 s[4]@ = pointer to source block
+ * @uint32 d[4]@ = pointer to destination block
+ *
+ * Returns: ---
+ *
+ * Use: Low-level block encryption and decryption.
+ */
+
+#define DO(what, t, aa, bb, cc, dd, a, b, c, d, w) do { \
+ aa = what(t, a, b, c, d) ^ *w++; \
+ bb = what(t, b, c, d, a) ^ *w++; \
+ cc = what(t, c, d, a, b) ^ *w++; \
+ dd = what(t, d, a, b, c) ^ *w++; \
+} while (0)
+
+#define UNDO(what, t, aa, bb, cc, dd, a, b, c, d, w) do { \
+ aa = what(t, a, d, c, b) ^ *w++; \
+ bb = what(t, b, a, d, c) ^ *w++; \
+ cc = what(t, c, b, a, d) ^ *w++; \
+ dd = what(t, d, c, b, a) ^ *w++; \
+} while (0)
+
+void rijndael_eblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst)
+{
+ uint32 a = s[0], b = s[1], c = s[2], d = s[3];
+ uint32 aa, bb, cc, dd;
+ const uint32 *w = k->w;
+
+ a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++;
+ aa = a; bb = b; cc = c; dd = d;
+
+ switch (k->nr) {
+ case 14:
+ DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w);
+ case 13:
+ DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w);
+ case 12:
+ DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w);
+ case 11:
+ DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w);
+ case 10:
+ default:
+ DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w);
+ DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w);
+ DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w);
+ DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w);
+ DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w);
+ DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w);
+ DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w);
+ DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w);
+ DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w);
+ }
+ DO(SUB, S, a, b, c, d, aa, bb, cc, dd, w);
+
+ dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d;
+}
+
+void rijndael_dblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst)
+{
+ uint32 a = s[0], b = s[1], c = s[2], d = s[3];
+ uint32 aa, bb, cc, dd;
+ const uint32 *w = k->wi;
+
+ a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++;
+ aa = a; bb = b; cc = c; dd = d;
+
+ switch (k->nr) {
+ case 14:
+ UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w);
+ case 13:
+ UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w);
+ case 12:
+ UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w);
+ case 11:
+ UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w);
+ case 10:
+ default:
+ UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w);
+ UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w);
+ UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w);
+ UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w);
+ UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w);
+ UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w);
+ UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w);
+ UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w);
+ UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w);
+ }
+ UNDO(SUB, SI, a, b, c, d, aa, bb, cc, dd, w);
+
+ dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d;
+}
+
+BLKC_TEST(RIJNDAEL, rijndael)
+
+/*----- That's all, folks -------------------------------------------------*/
projects / u / mdw / catacomb / blobdiff