Merged silc_1_0_branch to trunk.

[silc.git] / lib / silccrypt / ciphers_def.h

diff --git a/lib/silccrypt/ciphers_def.h b/lib/silccrypt/ciphers_def.h
index 085a980656c989202362bf1eef7e7211121b7da5..e254e68f93c1e9256b7140421abcb8f080e99514 100644 (file)
--- a/lib/silccrypt/ciphers_def.h
+++ b/lib/silccrypt/ciphers_def.h
@@ -2,14 +2,13 @@
 
   ciphers_def.h
 
-  Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+  Author: Pekka Riikonen <priikone@silcnet.org>
 
   Copyright (C) 1999 - 2000 Pekka Riikonen
 
   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 2 of the License, or
-  (at your option) any later version.
+  the Free Software Foundation; version 2 of the License.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -23,11 +22,85 @@
 
 /* General definitions for algorithms */
 typedef unsigned char u1byte;
-typedef uint32 u4byte;
-typedef uint32 u32;
+typedef SilcUInt32 u4byte;
+typedef SilcUInt32 u32;
 
 #define rotr(x, nr) (((x) >> ((int)(nr))) | ((x) << (32 - (int)(nr))))
 #define rotl(x, nr) (((x) << ((int)(nr))) | ((x) >> (32 - (int)(nr))))
 #define byte(x, nr) ((x) >> (nr * 8) & 255)
 
+/* Byte key to words */
+#define SILC_GET_WORD_KEY(s, d, len)           \
+do {                                           \
+  int _i;                                      \
+  for (_i = 0; _i < (len / 8) / 4; _i++)       \
+    SILC_GET32_LSB(d[_i], s + (_i * 4));       \
+} while(0);
+
+/* CBC mode macros. */
+
+#define SILC_CBC_GET_IV(d, s)                  \
+do {                                           \
+  SILC_GET32_LSB(d[0], &s[0]);                 \
+  SILC_GET32_LSB(d[1], &s[4]);                 \
+  SILC_GET32_LSB(d[2], &s[8]);                 \
+  SILC_GET32_LSB(d[3], &s[12]);                        \
+} while(0);
+
+#define SILC_CBC_PUT_IV(s, d)                  \
+do {                                           \
+  SILC_PUT32_LSB(s[0], &d[0]);                 \
+  SILC_PUT32_LSB(s[1], &d[4]);                 \
+  SILC_PUT32_LSB(s[2], &d[8]);                 \
+  SILC_PUT32_LSB(s[3], &d[12]);                        \
+} while(0);
+
+#define SILC_CBC_ENC_PRE(d, s)                 \
+do {                                           \
+  SILC_GET32_X_LSB(d[0], &s[0]);               \
+  SILC_GET32_X_LSB(d[1], &s[4]);               \
+  SILC_GET32_X_LSB(d[2], &s[8]);               \
+  SILC_GET32_X_LSB(d[3], &s[12]);              \
+} while(0);
+
+#define SILC_CBC_ENC_POST(s, d, t)             \
+do {                                           \
+  SILC_PUT32_LSB(s[0], &d[0]);                 \
+  SILC_PUT32_LSB(s[1], &d[4]);                 \
+  SILC_PUT32_LSB(s[2], &d[8]);                 \
+  SILC_PUT32_LSB(s[3], &d[12]);                        \
+                                               \
+  d += 16;                                     \
+  t += 16;                                     \
+} while(0);
+
+#define SILC_CBC_DEC_PRE(d, s)                 \
+do {                                           \
+  SILC_GET32_LSB(d[0], &s[0]);                 \
+  SILC_GET32_LSB(d[1], &s[4]);                 \
+  SILC_GET32_LSB(d[2], &s[8]);                 \
+  SILC_GET32_LSB(d[3], &s[12]);                        \
+} while(0);
+
+#define SILC_CBC_DEC_POST(s, d, p, t, siv)     \
+do {                                           \
+  s[0] ^= siv[0];                              \
+  s[1] ^= siv[1];                              \
+  s[2] ^= siv[2];                              \
+  s[3] ^= siv[3];                              \
+                                               \
+  SILC_PUT32_LSB(s[0], &d[0]);                 \
+  SILC_PUT32_LSB(s[1], &d[4]);                 \
+  SILC_PUT32_LSB(s[2], &d[8]);                 \
+  SILC_PUT32_LSB(s[3], &d[12]);                        \
+                                               \
+  siv[0] = t[0];                               \
+  siv[1] = t[1];                               \
+  siv[2] = t[2];                               \
+  siv[3] = t[3];                               \
+                                               \
+  d += 16;                                     \
+  p += 16;                                     \
+} while(0);
+
 #endif