library/camellia.c

   1 /*
   2  *      Camellia implementation
   3  *
   4  *      Copyright (C) 2009      Paul Bakker <polarssl_maintainer at polarssl dot org>
   5  *
   6  *      All rights reserved.
   7  *
   8  *      Redistribution and use in source and binary forms, with or without
   9  *      modification, are permitted provided that the following conditions
  10  *      are met:
  11  *
  12  *        * Redistributions of source code must retain the above copyright
  13  *              notice, this list of conditions and the following disclaimer.
  14  *        * Redistributions in binary form must reproduce the above copyright
  15  *              notice, this list of conditions and the following disclaimer in the
  16  *              documentation and/or other materials provided with the distribution.
  17  *        * Neither the names of PolarSSL or XySSL nor the names of its contributors
  18  *              may be used to endorse or promote products derived from this software
  19  *              without specific prior written permission.
  20  *
  21  *      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *      "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *      LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  *      FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *      OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *      SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  27  *      TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  28  *      PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  29  *      LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  30  *      NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  31  *      SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 /*
  34  *      The Camellia block cipher was designed by NTT and Mitsubishi Electric
  35  *      Corporation.
  36  *
  37  *      http://info.isl.ntt.co.jp/crypt/eng/camellia/dl/01espec.pdf
  38  */
  39
  40 #include "tropicssl/config.h"
  41
  42 #if defined(TROPICSSL_CAMELLIA_C)
  43
  44 #include "tropicssl/camellia.h"
  45
  46 #include <string.h>
  47
  48 /*
  49  * 32-bit integer manipulation macros (big endian)
  50  */
  51 #ifndef GET_ULONG_BE
  52 #define GET_ULONG_BE(n,b,i)                                                             \
  53         {                                                                                                       \
  54                 (n) = ( (unsigned long) (b)[(i)    ] << 24 )    \
  55                         | ( (unsigned long) (b)[(i) + 1] << 16 )        \
  56                         | ( (unsigned long) (b)[(i) + 2] <<      8 )    \
  57                         | ( (unsigned long) (b)[(i) + 3]           );   \
  58         }
  59 #endif
  60
  61 #ifndef PUT_ULONG_BE
  62 #define PUT_ULONG_BE(n,b,i)                                                             \
  63         {                                                                                                       \
  64                 (b)[(i)    ] = (unsigned char) ( (n) >> 24 );   \
  65                 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );   \
  66                 (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );   \
  67                 (b)[(i) + 3] = (unsigned char) ( (n)       );   \
  68         }
  69 #endif
  70
  71 static const unsigned char SIGMA_CHARS[6][8] = {
  72         {0xa0, 0x9e, 0x66, 0x7f, 0x3b, 0xcc, 0x90, 0x8b},
  73         {0xb6, 0x7a, 0xe8, 0x58, 0x4c, 0xaa, 0x73, 0xb2},
  74         {0xc6, 0xef, 0x37, 0x2f, 0xe9, 0x4f, 0x82, 0xbe},
  75         {0x54, 0xff, 0x53, 0xa5, 0xf1, 0xd3, 0x6f, 0x1c},
  76         {0x10, 0xe5, 0x27, 0xfa, 0xde, 0x68, 0x2d, 0x1d},
  77         {0xb0, 0x56, 0x88, 0xc2, 0xb3, 0xe6, 0xc1, 0xfd}
  78 };
  79
  80 #ifdef TROPICSSL_CAMELLIA_SMALL_MEMORY
  81
  82 static const unsigned char FSb[256] = {
  83         112, 130, 44, 236, 179, 39, 192, 229, 228, 133, 87, 53, 234, 12, 174,
  84         65,
  85         35, 239, 107, 147, 69, 25, 165, 33, 237, 14, 79, 78, 29, 101, 146, 189,
  86         134, 184, 175, 143, 124, 235, 31, 206, 62, 48, 220, 95, 94, 197, 11, 26,
  87         166, 225, 57, 202, 213, 71, 93, 61, 217, 1, 90, 214, 81, 86, 108, 77,
  88         139, 13, 154, 102, 251, 204, 176, 45, 116, 18, 43, 32, 240, 177, 132,
  89         153,
  90         223, 76, 203, 194, 52, 126, 118, 5, 109, 183, 169, 49, 209, 23, 4, 215,
  91         20, 88, 58, 97, 222, 27, 17, 28, 50, 15, 156, 22, 83, 24, 242, 34,
  92         254, 68, 207, 178, 195, 181, 122, 145, 36, 8, 232, 168, 96, 252, 105,
  93         80,
  94         170, 208, 160, 125, 161, 137, 98, 151, 84, 91, 30, 149, 224, 255, 100,
  95         210,
  96         16, 196, 0, 72, 163, 247, 117, 219, 138, 3, 230, 218, 9, 63, 221, 148,
  97         135, 92, 131, 2, 205, 74, 144, 51, 115, 103, 246, 243, 157, 127, 191,
  98         226,
  99         82, 155, 216, 38, 200, 55, 198, 59, 129, 150, 111, 75, 19, 190, 99, 46,
 100         233, 121, 167, 140, 159, 110, 188, 142, 41, 245, 249, 182, 47, 253, 180,
 101         89,
 102         120, 152, 6, 106, 231, 70, 113, 186, 212, 37, 171, 66, 136, 162, 141,
 103         250,
 104         114, 7, 185, 85, 248, 238, 172, 10, 54, 73, 42, 104, 60, 56, 241, 164,
 105         64, 40, 211, 123, 187, 201, 67, 193, 21, 227, 173, 244, 119, 199, 128,
 106         158
 107 };
 108
 109 #define SBOX1(n) FSb[(n)]
 110 #define SBOX2(n) (unsigned char)((FSb[(n)] >> 7 ^ FSb[(n)] << 1) & 0xff)
 111 #define SBOX3(n) (unsigned char)((FSb[(n)] >> 1 ^ FSb[(n)] << 7) & 0xff)
 112 #define SBOX4(n) FSb[((n) << 1 ^ (n) >> 7) &0xff]
 113
 114 #else
 115
 116 static const unsigned char FSb[256] = {
 117         112, 130, 44, 236, 179, 39, 192, 229, 228, 133, 87, 53, 234, 12, 174,
 118         65,
 119         35, 239, 107, 147, 69, 25, 165, 33, 237, 14, 79, 78, 29, 101, 146, 189,
 120         134, 184, 175, 143, 124, 235, 31, 206, 62, 48, 220, 95, 94, 197, 11, 26,
 121         166, 225, 57, 202, 213, 71, 93, 61, 217, 1, 90, 214, 81, 86, 108, 77,
 122         139, 13, 154, 102, 251, 204, 176, 45, 116, 18, 43, 32, 240, 177, 132,
 123         153,
 124         223, 76, 203, 194, 52, 126, 118, 5, 109, 183, 169, 49, 209, 23, 4, 215,
 125         20, 88, 58, 97, 222, 27, 17, 28, 50, 15, 156, 22, 83, 24, 242, 34,
 126         254, 68, 207, 178, 195, 181, 122, 145, 36, 8, 232, 168, 96, 252, 105,
 127         80,
 128         170, 208, 160, 125, 161, 137, 98, 151, 84, 91, 30, 149, 224, 255, 100,
 129         210,
 130         16, 196, 0, 72, 163, 247, 117, 219, 138, 3, 230, 218, 9, 63, 221, 148,
 131         135, 92, 131, 2, 205, 74, 144, 51, 115, 103, 246, 243, 157, 127, 191,
 132         226,
 133         82, 155, 216, 38, 200, 55, 198, 59, 129, 150, 111, 75, 19, 190, 99, 46,
 134         233, 121, 167, 140, 159, 110, 188, 142, 41, 245, 249, 182, 47, 253, 180,
 135         89,
 136         120, 152, 6, 106, 231, 70, 113, 186, 212, 37, 171, 66, 136, 162, 141,
 137         250,
 138         114, 7, 185, 85, 248, 238, 172, 10, 54, 73, 42, 104, 60, 56, 241, 164,
 139         64, 40, 211, 123, 187, 201, 67, 193, 21, 227, 173, 244, 119, 199, 128,
 140         158
 141 };
 142
 143 static const unsigned char FSb2[256] = {
 144         224, 5, 88, 217, 103, 78, 129, 203, 201, 11, 174, 106, 213, 24, 93, 130,
 145         70, 223, 214, 39, 138, 50, 75, 66, 219, 28, 158, 156, 58, 202, 37, 123,
 146         13, 113, 95, 31, 248, 215, 62, 157, 124, 96, 185, 190, 188, 139, 22, 52,
 147         77, 195, 114, 149, 171, 142, 186, 122, 179, 2, 180, 173, 162, 172, 216,
 148         154,
 149         23, 26, 53, 204, 247, 153, 97, 90, 232, 36, 86, 64, 225, 99, 9, 51,
 150         191, 152, 151, 133, 104, 252, 236, 10, 218, 111, 83, 98, 163, 46, 8,
 151         175,
 152         40, 176, 116, 194, 189, 54, 34, 56, 100, 30, 57, 44, 166, 48, 229, 68,
 153         253, 136, 159, 101, 135, 107, 244, 35, 72, 16, 209, 81, 192, 249, 210,
 154         160,
 155         85, 161, 65, 250, 67, 19, 196, 47, 168, 182, 60, 43, 193, 255, 200, 165,
 156         32, 137, 0, 144, 71, 239, 234, 183, 21, 6, 205, 181, 18, 126, 187, 41,
 157         15, 184, 7, 4, 155, 148, 33, 102, 230, 206, 237, 231, 59, 254, 127, 197,
 158         164, 55, 177, 76, 145, 110, 141, 118, 3, 45, 222, 150, 38, 125, 198, 92,
 159         211, 242, 79, 25, 63, 220, 121, 29, 82, 235, 243, 109, 94, 251, 105,
 160         178,
 161         240, 49, 12, 212, 207, 140, 226, 117, 169, 74, 87, 132, 17, 69, 27, 245,
 162         228, 14, 115, 170, 241, 221, 89, 20, 108, 146, 84, 208, 120, 112, 227,
 163         73,
 164         128, 80, 167, 246, 119, 147, 134, 131, 42, 199, 91, 233, 238, 143, 1, 61
 165 };
 166
 167 static const unsigned char FSb3[256] = {
 168         56, 65, 22, 118, 217, 147, 96, 242, 114, 194, 171, 154, 117, 6, 87, 160,
 169         145, 247, 181, 201, 162, 140, 210, 144, 246, 7, 167, 39, 142, 178, 73,
 170         222,
 171         67, 92, 215, 199, 62, 245, 143, 103, 31, 24, 110, 175, 47, 226, 133, 13,
 172         83, 240, 156, 101, 234, 163, 174, 158, 236, 128, 45, 107, 168, 43, 54,
 173         166,
 174         197, 134, 77, 51, 253, 102, 88, 150, 58, 9, 149, 16, 120, 216, 66, 204,
 175         239, 38, 229, 97, 26, 63, 59, 130, 182, 219, 212, 152, 232, 139, 2, 235,
 176         10, 44, 29, 176, 111, 141, 136, 14, 25, 135, 78, 11, 169, 12, 121, 17,
 177         127, 34, 231, 89, 225, 218, 61, 200, 18, 4, 116, 84, 48, 126, 180, 40,
 178         85, 104, 80, 190, 208, 196, 49, 203, 42, 173, 15, 202, 112, 255, 50,
 179         105,
 180         8, 98, 0, 36, 209, 251, 186, 237, 69, 129, 115, 109, 132, 159, 238, 74,
 181         195, 46, 193, 1, 230, 37, 72, 153, 185, 179, 123, 249, 206, 191, 223,
 182         113,
 183         41, 205, 108, 19, 100, 155, 99, 157, 192, 75, 183, 165, 137, 95, 177,
 184         23,
 185         244, 188, 211, 70, 207, 55, 94, 71, 148, 250, 252, 91, 151, 254, 90,
 186         172,
 187         60, 76, 3, 53, 243, 35, 184, 93, 106, 146, 213, 33, 68, 81, 198, 125,
 188         57, 131, 220, 170, 124, 119, 86, 5, 27, 164, 21, 52, 30, 28, 248, 82,
 189         32, 20, 233, 189, 221, 228, 161, 224, 138, 241, 214, 122, 187, 227, 64,
 190         79
 191 };
 192
 193 static const unsigned char FSb4[256] = {
 194         112, 44, 179, 192, 228, 87, 234, 174, 35, 107, 69, 165, 237, 79, 29,
 195         146,
 196         134, 175, 124, 31, 62, 220, 94, 11, 166, 57, 213, 93, 217, 90, 81, 108,
 197         139, 154, 251, 176, 116, 43, 240, 132, 223, 203, 52, 118, 109, 169, 209,
 198         4,
 199         20, 58, 222, 17, 50, 156, 83, 242, 254, 207, 195, 122, 36, 232, 96, 105,
 200         170, 160, 161, 98, 84, 30, 224, 100, 16, 0, 163, 117, 138, 230, 9, 221,
 201         135, 131, 205, 144, 115, 246, 157, 191, 82, 216, 200, 198, 129, 111, 19,
 202         99,
 203         233, 167, 159, 188, 41, 249, 47, 180, 120, 6, 231, 113, 212, 171, 136,
 204         141,
 205         114, 185, 248, 172, 54, 42, 60, 241, 64, 211, 187, 67, 21, 173, 119,
 206         128,
 207         130, 236, 39, 229, 133, 53, 12, 65, 239, 147, 25, 33, 14, 78, 101, 189,
 208         184, 143, 235, 206, 48, 95, 197, 26, 225, 202, 71, 61, 1, 214, 86, 77,
 209         13, 102, 204, 45, 18, 32, 177, 153, 76, 194, 126, 5, 183, 49, 23, 215,
 210         88, 97, 27, 28, 15, 22, 24, 34, 68, 178, 181, 145, 8, 168, 252, 80,
 211         208, 125, 137, 151, 91, 149, 255, 210, 196, 72, 247, 219, 3, 218, 63,
 212         148,
 213         92, 2, 74, 51, 103, 243, 127, 226, 155, 38, 55, 59, 150, 75, 190, 46,
 214         121, 140, 110, 142, 245, 182, 253, 89, 152, 106, 70, 186, 37, 66, 162,
 215         250,
 216         7, 85, 238, 10, 73, 104, 56, 164, 40, 123, 201, 193, 227, 244, 199, 158
 217 };
 218
 219 #define SBOX1(n) FSb[(n)]
 220 #define SBOX2(n) FSb2[(n)]
 221 #define SBOX3(n) FSb3[(n)]
 222 #define SBOX4(n) FSb4[(n)]
 223
 224 #endif
 225
 226 static const unsigned char shifts[2][4][4] = {
 227         {
 228          {1, 1, 1, 1},          /* KL */
 229          {0, 0, 0, 0},          /* KR */
 230          {1, 1, 1, 1},          /* KA */
 231          {0, 0, 0, 0}           /* KB */
 232          },
 233         {
 234          {1, 0, 1, 1},          /* KL */
 235          {1, 1, 0, 1},          /* KR */
 236          {1, 1, 1, 0},          /* KA */
 237          {1, 1, 0, 1}           /* KB */
 238          }
 239 };
 240
 241 static const char indexes[2][4][20] = {
 242         {
 243          {
 244           0, 1, 2, 3, 8, 9, 10, 11, 38, 39,
 245           36, 37, 23, 20, 21, 22, 27, -1, -1, 26},      /* KL -> RK */
 246          {
 247           -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 248           -1, -1, -1, -1, -1, -1, -1, -1, -1, -1},      /* KR -> RK */
 249          {
 250           4, 5, 6, 7, 12, 13, 14, 15, 16, 17,
 251           18, 19, -1, 24, 25, -1, 31, 28, 29, 30},      /* KA -> RK */
 252          {
 253           -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 254           -1, -1, -1, -1, -1, -1, -1, -1, -1, -1}       /* KB -> RK */
 255          },
 256         {
 257          {
 258           0, 1, 2, 3, 61, 62, 63, 60, -1, -1,
 259           -1, -1, 27, 24, 25, 26, 35, 32, 33, 34},      /* KL -> RK */
 260          {
 261           -1, -1, -1, -1, 8, 9, 10, 11, 16, 17,
 262           18, 19, -1, -1, -1, -1, 39, 36, 37, 38},      /* KR -> RK */
 263          {
 264           -1, -1, -1, -1, 12, 13, 14, 15, 58, 59,
 265           56, 57, 31, 28, 29, 30, -1, -1, -1, -1},      /* KA -> RK */
 266          {
 267           4, 5, 6, 7, 65, 66, 67, 64, 20, 21,
 268           22, 23, -1, -1, -1, -1, 43, 40, 41, 42}       /* KB -> RK */
 269          }
 270 };
 271
 272 static const char transposes[2][20] = {
 273         {
 274          21, 22, 23, 20,
 275          -1, -1, -1, -1,
 276          18, 19, 16, 17,
 277          11, 8, 9, 10,
 278          15, 12, 13, 14},
 279         {
 280          25, 26, 27, 24,
 281          29, 30, 31, 28,
 282          18, 19, 16, 17,
 283          -1, -1, -1, -1,
 284          -1, -1, -1, -1}
 285 };
 286
 287 /* Shift macro for 128 bit strings with rotation smaller than 32 bits (!) */
 288 #define ROTL(DEST, SRC, SHIFT)                                                                                  \
 289         {                                                                                                                                       \
 290                 (DEST)[0] = (SRC)[0] << (SHIFT) ^ (SRC)[1] >> (32 - (SHIFT));   \
 291                 (DEST)[1] = (SRC)[1] << (SHIFT) ^ (SRC)[2] >> (32 - (SHIFT));   \
 292                 (DEST)[2] = (SRC)[2] << (SHIFT) ^ (SRC)[3] >> (32 - (SHIFT));   \
 293                 (DEST)[3] = (SRC)[3] << (SHIFT) ^ (SRC)[0] >> (32 - (SHIFT));   \
 294         }
 295
 296 #define FL(XL, XR, KL, KR)                                                                                              \
 297         {                                                                                                                                       \
 298                 (XR) = ((((XL) & (KL)) << 1) | (((XL) & (KL)) >> 31)) ^ (XR);   \
 299                 (XL) = ((XR) | (KR)) ^ (XL);                                                                    \
 300         }
 301
 302 #define FLInv(YL, YR, KL, KR)                                                                                   \
 303         {                                                                                                                                       \
 304                 (YL) = ((YR) | (KR)) ^ (YL);                                                                    \
 305                 (YR) = ((((YL) & (KL)) << 1) | (((YL) & (KL)) >> 31)) ^ (YR);   \
 306         }
 307
 308 #define SHIFT_AND_PLACE(INDEX, OFFSET)                                                          \
 309         {                                                                                                                               \
 310                 TK[0] = KC[(OFFSET) * 4 + 0];                                                           \
 311                 TK[1] = KC[(OFFSET) * 4 + 1];                                                           \
 312                 TK[2] = KC[(OFFSET) * 4 + 2];                                                           \
 313                 TK[3] = KC[(OFFSET) * 4 + 3];                                                           \
 314                                                                                                                                         \
 315                 for ( i = 1; i <= 4; i++ )                                                                      \
 316                         if (shifts[(INDEX)][(OFFSET)][i -1])                                    \
 317                                 ROTL(TK + i * 4, TK, (15 * i) % 32);                            \
 318                                                                                                                                         \
 319                 for ( i = 0; i < 20; i++ )                                                                      \
 320                         if (indexes[(INDEX)][(OFFSET)][i] != -1) {                              \
 321                                 RK[(int)indexes[(INDEX)][(OFFSET)][i]] = TK[ i ];       \
 322                         }                                                                                                               \
 323         }
 324
 325 static void camellia_feistel(const unsigned long x[2],
 326                       const unsigned long k[2], unsigned long z[2])
 327 {
 328         unsigned long I0, I1;
 329         I0 = x[0] ^ k[0];
 330         I1 = x[1] ^ k[1];
 331
 332         I0 = (SBOX1((I0 >> 24) & 0xFF) << 24) |
 333             (SBOX2((I0 >> 16) & 0xFF) << 16) |
 334             (SBOX3((I0 >> 8) & 0xFF) << 8) | (SBOX4((I0) & 0xFF));
 335         I1 = (SBOX2((I1 >> 24) & 0xFF) << 24) |
 336             (SBOX3((I1 >> 16) & 0xFF) << 16) |
 337             (SBOX4((I1 >> 8) & 0xFF) << 8) | (SBOX1((I1) & 0xFF));
 338
 339         I0 ^= (I1 << 8) | (I1 >> 24);
 340         I1 ^= (I0 << 16) | (I0 >> 16);
 341         I0 ^= (I1 >> 8) | (I1 << 24);
 342         I1 ^= (I0 >> 8) | (I0 << 24);
 343
 344         z[0] ^= I1;
 345         z[1] ^= I0;
 346 }
 347
 348 /*
 349  * Camellia key schedule (encryption)
 350  */
 351 void camellia_setkey_enc(camellia_context * ctx, const unsigned char *key,
 352                          int keysize)
 353 {
 354         int i, idx;
 355         unsigned long *RK;
 356         unsigned char t[64];
 357
 358         RK = ctx->rk;
 359
 360         memset(t, 0, 64);
 361         memset(RK, 0, sizeof(ctx->rk));
 362
 363         switch (keysize) {
 364         case 128:
 365                 ctx->nr = 3;
 366                 idx = 0;
 367                 break;
 368         case 192:
 369         case 256:
 370                 ctx->nr = 4;
 371                 idx = 1;
 372                 break;
 373         default:
 374                 return;
 375         }
 376
 377         for (i = 0; i < keysize / 8; ++i)
 378                 t[i] = key[i];
 379
 380         if (keysize == 192) {
 381                 for (i = 0; i < 8; i++)
 382                         t[24 + i] = ~t[16 + i];
 383         }
 384
 385         /*
 386          * Prepare SIGMA values
 387          */
 388         unsigned long SIGMA[6][2];
 389         for (i = 0; i < 6; i++) {
 390                 GET_ULONG_BE(SIGMA[i][0], SIGMA_CHARS[i], 0);
 391                 GET_ULONG_BE(SIGMA[i][1], SIGMA_CHARS[i], 4);
 392         }
 393
 394         /*
 395          * Key storage in KC
 396          * Order: KL, KR, KA, KB
 397          */
 398         unsigned long KC[16];
 399         memset(KC, 0, sizeof(KC));
 400
 401         /* Store KL, KR */
 402         for (i = 0; i < 8; i++)
 403                 GET_ULONG_BE(KC[i], t, i * 4);
 404
 405         /* Generate KA */
 406         for (i = 0; i < 4; ++i)
 407                 KC[8 + i] = KC[i] ^ KC[4 + i];
 408
 409         camellia_feistel(KC + 8, SIGMA[0], KC + 10);
 410         camellia_feistel(KC + 10, SIGMA[1], KC + 8);
 411
 412         for (i = 0; i < 4; ++i)
 413                 KC[8 + i] ^= KC[i];
 414
 415         camellia_feistel(KC + 8, SIGMA[2], KC + 10);
 416         camellia_feistel(KC + 10, SIGMA[3], KC + 8);
 417
 418         if (keysize > 128) {
 419                 /* Generate KB */
 420                 for (i = 0; i < 4; ++i)
 421                         KC[12 + i] = KC[4 + i] ^ KC[8 + i];
 422
 423                 camellia_feistel(KC + 12, SIGMA[4], KC + 14);
 424                 camellia_feistel(KC + 14, SIGMA[5], KC + 12);
 425         }
 426
 427         /*
 428          * Generating subkeys
 429          */
 430         unsigned long TK[20];
 431
 432         /* Manipulating KL */
 433         SHIFT_AND_PLACE(idx, 0);
 434
 435         /* Manipulating KR */
 436         if (keysize > 128) {
 437                 SHIFT_AND_PLACE(idx, 1);
 438         }
 439
 440         /* Manipulating KA */
 441         SHIFT_AND_PLACE(idx, 2);
 442
 443         /* Manipulating KB */
 444         if (keysize > 128) {
 445                 SHIFT_AND_PLACE(idx, 3);
 446         }
 447
 448         /* Do transpositions */
 449         for (i = 0; i < 20; i++) {
 450                 if (transposes[idx][i] != -1) {
 451                         RK[32 + 12 * idx + i] = RK[(int)transposes[idx][i]];
 452                 }
 453         }
 454 }
 455
 456 /*
 457  * Camellia key schedule (decryption)
 458  */
 459 void camellia_setkey_dec(camellia_context * ctx, const unsigned char *key,
 460                          int keysize)
 461 {
 462         int i, idx;
 463         camellia_context cty;
 464         unsigned long *RK;
 465         unsigned long *SK;
 466
 467         switch (keysize) {
 468         case 128:
 469                 ctx->nr = 3;
 470                 idx = 0;
 471                 break;
 472         case 192:
 473         case 256:
 474                 ctx->nr = 4;
 475                 idx = 1;
 476                 break;
 477         default:
 478                 return;
 479         }
 480
 481         RK = ctx->rk;
 482
 483         camellia_setkey_enc(&cty, key, keysize);
 484
 485         SK = cty.rk + 24 * 2 + 8 * idx * 2;
 486
 487         *RK++ = *SK++;
 488         *RK++ = *SK++;
 489         *RK++ = *SK++;
 490         *RK++ = *SK++;
 491
 492         for (i = 22 + 8 * idx, SK -= 6; i > 0; i--, SK -= 4) {
 493                 *RK++ = *SK++;
 494                 *RK++ = *SK++;
 495         }
 496
 497         SK -= 2;
 498
 499         *RK++ = *SK++;
 500         *RK++ = *SK++;
 501         *RK++ = *SK++;
 502         *RK++ = *SK++;
 503
 504         memset(&cty, 0, sizeof(camellia_context));
 505 }
 506
 507 /*
 508  * Camellia-ECB block encryption/decryption
 509  */
 510 void camellia_crypt_ecb(camellia_context * ctx,
 511                         int mode,
 512                         const unsigned char input[16],
 513                         unsigned char output[16])
 514 {
 515         int NR;
 516         unsigned long *RK, X[4];
 517
 518         ((void)mode);
 519
 520         NR = ctx->nr;
 521         RK = ctx->rk;
 522
 523         GET_ULONG_BE(X[0], input, 0);
 524         GET_ULONG_BE(X[1], input, 4);
 525         GET_ULONG_BE(X[2], input, 8);
 526         GET_ULONG_BE(X[3], input, 12);
 527
 528         X[0] ^= *RK++;
 529         X[1] ^= *RK++;
 530         X[2] ^= *RK++;
 531         X[3] ^= *RK++;
 532
 533         while (NR) {
 534                 --NR;
 535                 camellia_feistel(X, RK, X + 2);
 536                 RK += 2;
 537                 camellia_feistel(X + 2, RK, X);
 538                 RK += 2;
 539                 camellia_feistel(X, RK, X + 2);
 540                 RK += 2;
 541                 camellia_feistel(X + 2, RK, X);
 542                 RK += 2;
 543                 camellia_feistel(X, RK, X + 2);
 544                 RK += 2;
 545                 camellia_feistel(X + 2, RK, X);
 546                 RK += 2;
 547
 548                 if (NR) {
 549                         FL(X[0], X[1], RK[0], RK[1]);
 550                         RK += 2;
 551                         FLInv(X[2], X[3], RK[0], RK[1]);
 552                         RK += 2;
 553                 }
 554         }
 555
 556         X[2] ^= *RK++;
 557         X[3] ^= *RK++;
 558         X[0] ^= *RK++;
 559         X[1] ^= *RK++;
 560
 561         PUT_ULONG_BE(X[2], output, 0);
 562         PUT_ULONG_BE(X[3], output, 4);
 563         PUT_ULONG_BE(X[0], output, 8);
 564         PUT_ULONG_BE(X[1], output, 12);
 565 }
 566
 567 /*
 568  * Camellia-CBC buffer encryption/decryption
 569  */
 570 void camellia_crypt_cbc(camellia_context * ctx,
 571                         int mode,
 572                         int length,
 573                         unsigned char iv[16],
 574                         const unsigned char *input,
 575                         unsigned char *output)
 576 {
 577         int i;
 578         unsigned char temp[16];
 579
 580         if (mode == CAMELLIA_DECRYPT) {
 581                 while (length > 0) {
 582                         memcpy(temp, input, 16);
 583                         camellia_crypt_ecb(ctx, mode, input, output);
 584
 585                         for (i = 0; i < 16; i++)
 586                                 output[i] = (unsigned char)(output[i] ^ iv[i]);
 587
 588                         memcpy(iv, temp, 16);
 589
 590                         input += 16;
 591                         output += 16;
 592                         length -= 16;
 593                 }
 594         } else {
 595                 while (length > 0) {
 596                         for (i = 0; i < 16; i++)
 597                                 output[i] = (unsigned char)(input[i] ^ iv[i]);
 598
 599                         camellia_crypt_ecb(ctx, mode, output, output);
 600                         memcpy(iv, output, 16);
 601
 602                         input += 16;
 603                         output += 16;
 604                         length -= 16;
 605                 }
 606         }
 607 }
 608
 609 /*
 610  * Camellia-CFB128 buffer encryption/decryption
 611  */
 612 void camellia_crypt_cfb128(camellia_context * ctx,
 613                            int mode,
 614                            int length,
 615                            int *iv_off,
 616                            unsigned char iv[16],
 617                            const unsigned char *input,
 618                            unsigned char *output)
 619 {
 620         int c, n = *iv_off;
 621
 622         if (mode == CAMELLIA_DECRYPT) {
 623                 while (length--) {
 624                         if (n == 0)
 625                                 camellia_crypt_ecb(ctx, CAMELLIA_ENCRYPT, iv,
 626                                                    iv);
 627
 628                         c = *input++;
 629                         *output++ = (unsigned char)(c ^ iv[n]);
 630                         iv[n] = (unsigned char)c;
 631
 632                         n = (n + 1) & 0x0F;
 633                 }
 634         } else {
 635                 while (length--) {
 636                         if (n == 0)
 637                                 camellia_crypt_ecb(ctx, CAMELLIA_ENCRYPT, iv,
 638                                                    iv);
 639
 640                         iv[n] = *output++ = (unsigned char)(iv[n] ^ *input++);
 641
 642                         n = (n + 1) & 0x0F;
 643                 }
 644         }
 645
 646         *iv_off = n;
 647 }
 648
 649 #if defined(TROPICSSL_SELF_TEST)
 650
 651 #include <stdio.h>
 652
 653 /*
 654  * Camellia test vectors from:
 655  *
 656  * http://info.isl.ntt.co.jp/crypt/eng/camellia/technology.html:
 657  *       http://info.isl.ntt.co.jp/crypt/eng/camellia/dl/cryptrec/intermediate.txt
 658  *       http://info.isl.ntt.co.jp/crypt/eng/camellia/dl/cryptrec/t_camellia.txt
 659  *                                              (For each bitlength: Key 0, Nr 39)
 660  */
 661 #define CAMELLIA_TESTS_ECB      2
 662
 663 static const unsigned char camellia_test_ecb_key[3][CAMELLIA_TESTS_ECB][32] = {
 664         {
 665          {
 666           0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
 667           0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10},
 668          {
 669           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 670           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
 671          },
 672         {
 673          {
 674           0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
 675           0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10,
 676           0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77},
 677          {
 678           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 679           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 680           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
 681          },
 682         {
 683          {
 684           0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
 685           0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10,
 686           0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
 687           0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff},
 688          {
 689           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 690           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 691           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 692           0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
 693          },
 694 };
 695
 696 static const unsigned char camellia_test_ecb_plain[CAMELLIA_TESTS_ECB][16] = {
 697         {
 698          0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
 699          0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10},
 700         {
 701          0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 702          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
 703 };
 704
 705 static const unsigned char camellia_test_ecb_cipher[3][CAMELLIA_TESTS_ECB][16] = {
 706         {
 707          {
 708           0x67, 0x67, 0x31, 0x38, 0x54, 0x96, 0x69, 0x73,
 709           0x08, 0x57, 0x06, 0x56, 0x48, 0xea, 0xbe, 0x43},
 710          {
 711           0x38, 0x3C, 0x6C, 0x2A, 0xAB, 0xEF, 0x7F, 0xDE,
 712           0x25, 0xCD, 0x47, 0x0B, 0xF7, 0x74, 0xA3, 0x31}
 713          },
 714         {
 715          {
 716           0xb4, 0x99, 0x34, 0x01, 0xb3, 0xe9, 0x96, 0xf8,
 717           0x4e, 0xe5, 0xce, 0xe7, 0xd7, 0x9b, 0x09, 0xb9},
 718          {
 719           0xD1, 0x76, 0x3F, 0xC0, 0x19, 0xD7, 0x7C, 0xC9,
 720           0x30, 0xBF, 0xF2, 0xA5, 0x6F, 0x7C, 0x93, 0x64}
 721          },
 722         {
 723          {
 724           0x9a, 0xcc, 0x23, 0x7d, 0xff, 0x16, 0xd7, 0x6c,
 725           0x20, 0xef, 0x7c, 0x91, 0x9e, 0x3a, 0x75, 0x09},
 726          {
 727           0x05, 0x03, 0xFB, 0x10, 0xAB, 0x24, 0x1E, 0x7C,
 728           0xF4, 0x5D, 0x8C, 0xDE, 0xEE, 0x47, 0x43, 0x35}
 729          }
 730 };
 731
 732 #define CAMELLIA_TESTS_CBC      3
 733
 734 static const unsigned char camellia_test_cbc_key[3][32] = {
 735         {
 736          0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6,
 737          0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C}
 738         ,
 739         {
 740          0x8E, 0x73, 0xB0, 0xF7, 0xDA, 0x0E, 0x64, 0x52,
 741          0xC8, 0x10, 0xF3, 0x2B, 0x80, 0x90, 0x79, 0xE5,
 742          0x62, 0xF8, 0xEA, 0xD2, 0x52, 0x2C, 0x6B, 0x7B}
 743         ,
 744         {
 745          0x60, 0x3D, 0xEB, 0x10, 0x15, 0xCA, 0x71, 0xBE,
 746          0x2B, 0x73, 0xAE, 0xF0, 0x85, 0x7D, 0x77, 0x81,
 747          0x1F, 0x35, 0x2C, 0x07, 0x3B, 0x61, 0x08, 0xD7,
 748          0x2D, 0x98, 0x10, 0xA3, 0x09, 0x14, 0xDF, 0xF4}
 749 };
 750
 751 static const unsigned char camellia_test_cbc_iv[16] = {
 752         0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
 753         0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F
 754 }
 755
 756 ;
 757
 758 static const unsigned char camellia_test_cbc_plain[CAMELLIA_TESTS_CBC][16] = {
 759         {
 760          0x6B, 0xC1, 0xBE, 0xE2, 0x2E, 0x40, 0x9F, 0x96,
 761          0xE9, 0x3D, 0x7E, 0x11, 0x73, 0x93, 0x17, 0x2A},
 762         {
 763          0xAE, 0x2D, 0x8A, 0x57, 0x1E, 0x03, 0xAC, 0x9C,
 764          0x9E, 0xB7, 0x6F, 0xAC, 0x45, 0xAF, 0x8E, 0x51},
 765         {
 766          0x30, 0xC8, 0x1C, 0x46, 0xA3, 0x5C, 0xE4, 0x11,
 767          0xE5, 0xFB, 0xC1, 0x19, 0x1A, 0x0A, 0x52, 0xEF}
 768
 769 };
 770
 771 static const unsigned char camellia_test_cbc_cipher[3][CAMELLIA_TESTS_CBC][16] = {
 772         {
 773          {
 774           0x16, 0x07, 0xCF, 0x49, 0x4B, 0x36, 0xBB, 0xF0,
 775           0x0D, 0xAE, 0xB0, 0xB5, 0x03, 0xC8, 0x31, 0xAB},
 776          {
 777           0xA2, 0xF2, 0xCF, 0x67, 0x16, 0x29, 0xEF, 0x78,
 778           0x40, 0xC5, 0xA5, 0xDF, 0xB5, 0x07, 0x48, 0x87},
 779          {
 780           0x0F, 0x06, 0x16, 0x50, 0x08, 0xCF, 0x8B, 0x8B,
 781           0x5A, 0x63, 0x58, 0x63, 0x62, 0x54, 0x3E, 0x54}
 782          },
 783         {
 784          {
 785           0x2A, 0x48, 0x30, 0xAB, 0x5A, 0xC4, 0xA1, 0xA2,
 786           0x40, 0x59, 0x55, 0xFD, 0x21, 0x95, 0xCF, 0x93},
 787          {
 788           0x5D, 0x5A, 0x86, 0x9B, 0xD1, 0x4C, 0xE5, 0x42,
 789           0x64, 0xF8, 0x92, 0xA6, 0xDD, 0x2E, 0xC3, 0xD5},
 790          {
 791           0x37, 0xD3, 0x59, 0xC3, 0x34, 0x98, 0x36, 0xD8,
 792           0x84, 0xE3, 0x10, 0xAD, 0xDF, 0x68, 0xC4, 0x49}
 793          },
 794         {
 795          {
 796           0xE6, 0xCF, 0xA3, 0x5F, 0xC0, 0x2B, 0x13, 0x4A,
 797           0x4D, 0x2C, 0x0B, 0x67, 0x37, 0xAC, 0x3E, 0xDA},
 798          {
 799           0x36, 0xCB, 0xEB, 0x73, 0xBD, 0x50, 0x4B, 0x40,
 800           0x70, 0xB1, 0xB7, 0xDE, 0x2B, 0x21, 0xEB, 0x50},
 801          {
 802           0xE3, 0x1A, 0x60, 0x55, 0x29, 0x7D, 0x96, 0xCA,
 803           0x33, 0x30, 0xCD, 0xF1, 0xB1, 0x86, 0x0A, 0x83}
 804          }
 805 };
 806
 807 /*
 808  * Checkup routine
 809  */
 810 int camellia_self_test(int verbose)
 811 {
 812         int i, j, u, v;
 813         unsigned char key[32];
 814         unsigned char buf[64];
 815         unsigned char src[16];
 816         unsigned char dst[16];
 817         unsigned char iv[16];
 818         camellia_context ctx;
 819
 820         memset(key, 0, 32);
 821
 822         for (j = 0; j < 6; j++) {
 823                 u = j >> 1;
 824                 v = j & 1;
 825
 826                 if (verbose != 0)
 827                         printf("  CAMELLIA-ECB-%3d (%s): ", 128 + u * 64,
 828                                (v == CAMELLIA_DECRYPT) ? "dec" : "enc");
 829
 830                 for (i = 0; i < CAMELLIA_TESTS_ECB; i++) {
 831                         memcpy(key, camellia_test_ecb_key[u][i], 16 + 8 * u);
 832
 833                         if (v == CAMELLIA_DECRYPT) {
 834                                 camellia_setkey_dec(&ctx, key, 128 + u * 64);
 835                                 memcpy(src, camellia_test_ecb_cipher[u][i], 16);
 836                                 memcpy(dst, camellia_test_ecb_plain[i], 16);
 837                         } else {        /* CAMELLIA_ENCRYPT */
 838                                 camellia_setkey_enc(&ctx, key, 128 + u * 64);
 839                                 memcpy(src, camellia_test_ecb_plain[i], 16);
 840                                 memcpy(dst, camellia_test_ecb_cipher[u][i], 16);
 841                         }
 842
 843                         camellia_crypt_ecb(&ctx, v, src, buf);
 844
 845                         if (memcmp(buf, dst, 16) != 0) {
 846                                 if (verbose != 0)
 847                                         printf("failed\n");
 848
 849                                 return (1);
 850                         }
 851                 }
 852
 853                 if (verbose != 0)
 854                         printf("passed\n");
 855         }
 856
 857         if (verbose != 0)
 858                 printf("\n");
 859
 860         /*
 861          * CBC mode
 862          */
 863         for (j = 0; j < 6; j++) {
 864                 u = j >> 1;
 865                 v = j & 1;
 866
 867                 if (verbose != 0)
 868                         printf("  CAMELLIA-CBC-%3d (%s): ", 128 + u * 64,
 869                                (v == CAMELLIA_DECRYPT) ? "dec" : "enc");
 870
 871                 memcpy(src, camellia_test_cbc_iv, 16);
 872                 memcpy(dst, camellia_test_cbc_iv, 16);
 873                 memcpy(key, camellia_test_cbc_key[u], 16 + 8 * u);
 874
 875                 if (v == CAMELLIA_DECRYPT) {
 876                         camellia_setkey_dec(&ctx, key, 128 + u * 64);
 877                 } else {
 878                         camellia_setkey_enc(&ctx, key, 128 + u * 64);
 879                 }
 880
 881                 for (i = 0; i < CAMELLIA_TESTS_CBC; i++) {
 882
 883                         if (v == CAMELLIA_DECRYPT) {
 884                                 memcpy(iv, src, 16);
 885                                 memcpy(src, camellia_test_cbc_cipher[u][i], 16);
 886                                 memcpy(dst, camellia_test_cbc_plain[i], 16);
 887                         } else {        /* CAMELLIA_ENCRYPT */
 888                                 memcpy(iv, dst, 16);
 889                                 memcpy(src, camellia_test_cbc_plain[i], 16);
 890                                 memcpy(dst, camellia_test_cbc_cipher[u][i], 16);
 891                         }
 892
 893                         camellia_crypt_cbc(&ctx, v, 16, iv, src, buf);
 894
 895                         if (memcmp(buf, dst, 16) != 0) {
 896                                 if (verbose != 0)
 897                                         printf("failed\n");
 898
 899                                 return (1);
 900                         }
 901                 }
 902
 903                 if (verbose != 0)
 904                         printf("passed\n");
 905         }
 906
 907         if (verbose != 0)
 908                 printf("\n");
 909
 910         return (0);
 911 }
 912
 913 #endif
 914
 915 #endif