library/camellia.c

/*
 *  Camellia implementation
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
/*
 *  The Camellia block cipher was designed by NTT and Mitsubishi Electric
 *  Corporation.
 *
 *  http://info.isl.ntt.co.jp/crypt/eng/camellia/dl/01espec.pdf
 */

#include "common.h"

#if defined(MBEDTLS_CAMELLIA_C)

#    include "mbedtls/camellia.h"
#    include "mbedtls/platform_util.h"

#    include <string.h>

#    if defined(MBEDTLS_SELF_TEST)
#        if defined(MBEDTLS_PLATFORM_C)
#            include "mbedtls/platform.h"
#        else
#            include <stdio.h>
#            define mbedtls_printf printf
#        endif /* MBEDTLS_PLATFORM_C */
#    endif /* MBEDTLS_SELF_TEST */

#    if !defined(MBEDTLS_CAMELLIA_ALT)

/* Parameter validation macros */
#        define CAMELLIA_VALIDATE_RET(cond)     \
            MBEDTLS_INTERNAL_VALIDATE_RET(cond, \
                                          MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA)
#        define CAMELLIA_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE(cond)

/*
 * 32-bit integer manipulation macros (big endian)
 */
#        ifndef GET_UINT32_BE
#            define GET_UINT32_BE(n, b, i)                 \
                {                                          \
                    (n) = ((uint32_t)(b)[(i)] << 24) |     \
                          ((uint32_t)(b)[(i) + 1] << 16) | \
                          ((uint32_t)(b)[(i) + 2] << 8) |  \
                          ((uint32_t)(b)[(i) + 3]);        \
                }
#        endif

#        ifndef PUT_UINT32_BE
#            define PUT_UINT32_BE(n, b, i)                     \
                {                                              \
                    (b)[(i)] = (unsigned char)((n) >> 24);     \
                    (b)[(i) + 1] = (unsigned char)((n) >> 16); \
                    (b)[(i) + 2] = (unsigned char)((n) >> 8);  \
                    (b)[(i) + 3] = (unsigned char)((n));       \
                }
#        endif

static const unsigned char SIGMA_CHARS[6][8] = {
    { 0xa0, 0x9e, 0x66, 0x7f, 0x3b, 0xcc, 0x90, 0x8b },
    { 0xb6, 0x7a, 0xe8, 0x58, 0x4c, 0xaa, 0x73, 0xb2 },
    { 0xc6, 0xef, 0x37, 0x2f, 0xe9, 0x4f, 0x82, 0xbe },
    { 0x54, 0xff, 0x53, 0xa5, 0xf1, 0xd3, 0x6f, 0x1c },
    { 0x10, 0xe5, 0x27, 0xfa, 0xde, 0x68, 0x2d, 0x1d },
    { 0xb0, 0x56, 0x88, 0xc2, 0xb3, 0xe6, 0xc1, 0xfd }
};

#        if defined(MBEDTLS_CAMELLIA_SMALL_MEMORY)

static const unsigned char FSb[256] = {
    112, 130, 44,  236, 179, 39,  192, 229, 228, 133, 87,  53,  234, 12,  174,
    65,  35,  239, 107, 147, 69,  25,  165, 33,  237, 14,  79,  78,  29,  101,
    146, 189, 134, 184, 175, 143, 124, 235, 31,  206, 62,  48,  220, 95,  94,
    197, 11,  26,  166, 225, 57,  202, 213, 71,  93,  61,  217, 1,   90,  214,
    81,  86,  108, 77,  139, 13,  154, 102, 251, 204, 176, 45,  116, 18,  43,
    32,  240, 177, 132, 153, 223, 76,  203, 194, 52,  126, 118, 5,   109, 183,
    169, 49,  209, 23,  4,   215, 20,  88,  58,  97,  222, 27,  17,  28,  50,
    15,  156, 22,  83,  24,  242, 34,  254, 68,  207, 178, 195, 181, 122, 145,
    36,  8,   232, 168, 96,  252, 105, 80,  170, 208, 160, 125, 161, 137, 98,
    151, 84,  91,  30,  149, 224, 255, 100, 210, 16,  196, 0,   72,  163, 247,
    117, 219, 138, 3,   230, 218, 9,   63,  221, 148, 135, 92,  131, 2,   205,
    74,  144, 51,  115, 103, 246, 243, 157, 127, 191, 226, 82,  155, 216, 38,
    200, 55,  198, 59,  129, 150, 111, 75,  19,  190, 99,  46,  233, 121, 167,
    140, 159, 110, 188, 142, 41,  245, 249, 182, 47,  253, 180, 89,  120, 152,
    6,   106, 231, 70,  113, 186, 212, 37,  171, 66,  136, 162, 141, 250, 114,
    7,   185, 85,  248, 238, 172, 10,  54,  73,  42,  104, 60,  56,  241, 164,
    64,  40,  211, 123, 187, 201, 67,  193, 21,  227, 173, 244, 119, 199, 128,
    158
};

#            define SBOX1(n) FSb[(n)]
#            define SBOX2(n) \
                (unsigned char)((FSb[(n)] >> 7 ^ FSb[(n)] << 1) & 0xff)
#            define SBOX3(n) \
                (unsigned char)((FSb[(n)] >> 1 ^ FSb[(n)] << 7) & 0xff)
#            define SBOX4(n) FSb[((n) << 1 ^ (n) >> 7) & 0xff]

#        else /* MBEDTLS_CAMELLIA_SMALL_MEMORY */

static const unsigned char FSb[256] = {
    112, 130, 44,  236, 179, 39,  192, 229, 228, 133, 87,  53,  234, 12,  174,
    65,  35,  239, 107, 147, 69,  25,  165, 33,  237, 14,  79,  78,  29,  101,
    146, 189, 134, 184, 175, 143, 124, 235, 31,  206, 62,  48,  220, 95,  94,
    197, 11,  26,  166, 225, 57,  202, 213, 71,  93,  61,  217, 1,   90,  214,
    81,  86,  108, 77,  139, 13,  154, 102, 251, 204, 176, 45,  116, 18,  43,
    32,  240, 177, 132, 153, 223, 76,  203, 194, 52,  126, 118, 5,   109, 183,
    169, 49,  209, 23,  4,   215, 20,  88,  58,  97,  222, 27,  17,  28,  50,
    15,  156, 22,  83,  24,  242, 34,  254, 68,  207, 178, 195, 181, 122, 145,
    36,  8,   232, 168, 96,  252, 105, 80,  170, 208, 160, 125, 161, 137, 98,
    151, 84,  91,  30,  149, 224, 255, 100, 210, 16,  196, 0,   72,  163, 247,
    117, 219, 138, 3,   230, 218, 9,   63,  221, 148, 135, 92,  131, 2,   205,
    74,  144, 51,  115, 103, 246, 243, 157, 127, 191, 226, 82,  155, 216, 38,
    200, 55,  198, 59,  129, 150, 111, 75,  19,  190, 99,  46,  233, 121, 167,
    140, 159, 110, 188, 142, 41,  245, 249, 182, 47,  253, 180, 89,  120, 152,
    6,   106, 231, 70,  113, 186, 212, 37,  171, 66,  136, 162, 141, 250, 114,
    7,   185, 85,  248, 238, 172, 10,  54,  73,  42,  104, 60,  56,  241, 164,
    64,  40,  211, 123, 187, 201, 67,  193, 21,  227, 173, 244, 119, 199, 128,
    158
};

static const unsigned char FSb2[256] = {
    224, 5,   88,  217, 103, 78,  129, 203, 201, 11,  174, 106, 213, 24,  93,
    130, 70,  223, 214, 39,  138, 50,  75,  66,  219, 28,  158, 156, 58,  202,
    37,  123, 13,  113, 95,  31,  248, 215, 62,  157, 124, 96,  185, 190, 188,
    139, 22,  52,  77,  195, 114, 149, 171, 142, 186, 122, 179, 2,   180, 173,
    162, 172, 216, 154, 23,  26,  53,  204, 247, 153, 97,  90,  232, 36,  86,
    64,  225, 99,  9,   51,  191, 152, 151, 133, 104, 252, 236, 10,  218, 111,
    83,  98,  163, 46,  8,   175, 40,  176, 116, 194, 189, 54,  34,  56,  100,
    30,  57,  44,  166, 48,  229, 68,  253, 136, 159, 101, 135, 107, 244, 35,
    72,  16,  209, 81,  192, 249, 210, 160, 85,  161, 65,  250, 67,  19,  196,
    47,  168, 182, 60,  43,  193, 255, 200, 165, 32,  137, 0,   144, 71,  239,
    234, 183, 21,  6,   205, 181, 18,  126, 187, 41,  15,  184, 7,   4,   155,
    148, 33,  102, 230, 206, 237, 231, 59,  254, 127, 197, 164, 55,  177, 76,
    145, 110, 141, 118, 3,   45,  222, 150, 38,  125, 198, 92,  211, 242, 79,
    25,  63,  220, 121, 29,  82,  235, 243, 109, 94,  251, 105, 178, 240, 49,
    12,  212, 207, 140, 226, 117, 169, 74,  87,  132, 17,  69,  27,  245, 228,
    14,  115, 170, 241, 221, 89,  20,  108, 146, 84,  208, 120, 112, 227, 73,
    128, 80,  167, 246, 119, 147, 134, 131, 42,  199, 91,  233, 238, 143, 1,
    61
};

static const unsigned char FSb3[256] = {
    56,  65,  22,  118, 217, 147, 96,  242, 114, 194, 171, 154, 117, 6,   87,
    160, 145, 247, 181, 201, 162, 140, 210, 144, 246, 7,   167, 39,  142, 178,
    73,  222, 67,  92,  215, 199, 62,  245, 143, 103, 31,  24,  110, 175, 47,
    226, 133, 13,  83,  240, 156, 101, 234, 163, 174, 158, 236, 128, 45,  107,
    168, 43,  54,  166, 197, 134, 77,  51,  253, 102, 88,  150, 58,  9,   149,
    16,  120, 216, 66,  204, 239, 38,  229, 97,  26,  63,  59,  130, 182, 219,
    212, 152, 232, 139, 2,   235, 10,  44,  29,  176, 111, 141, 136, 14,  25,
    135, 78,  11,  169, 12,  121, 17,  127, 34,  231, 89,  225, 218, 61,  200,
    18,  4,   116, 84,  48,  126, 180, 40,  85,  104, 80,  190, 208, 196, 49,
    203, 42,  173, 15,  202, 112, 255, 50,  105, 8,   98,  0,   36,  209, 251,
    186, 237, 69,  129, 115, 109, 132, 159, 238, 74,  195, 46,  193, 1,   230,
    37,  72,  153, 185, 179, 123, 249, 206, 191, 223, 113, 41,  205, 108, 19,
    100, 155, 99,  157, 192, 75,  183, 165, 137, 95,  177, 23,  244, 188, 211,
    70,  207, 55,  94,  71,  148, 250, 252, 91,  151, 254, 90,  172, 60,  76,
    3,   53,  243, 35,  184, 93,  106, 146, 213, 33,  68,  81,  198, 125, 57,
    131, 220, 170, 124, 119, 86,  5,   27,  164, 21,  52,  30,  28,  248, 82,
    32,  20,  233, 189, 221, 228, 161, 224, 138, 241, 214, 122, 187, 227, 64,
    79
};

static const unsigned char FSb4[256] = {
    112, 44,  179, 192, 228, 87,  234, 174, 35,  107, 69,  165, 237, 79,  29,
    146, 134, 175, 124, 31,  62,  220, 94,  11,  166, 57,  213, 93,  217, 90,
    81,  108, 139, 154, 251, 176, 116, 43,  240, 132, 223, 203, 52,  118, 109,
    169, 209, 4,   20,  58,  222, 17,  50,  156, 83,  242, 254, 207, 195, 122,
    36,  232, 96,  105, 170, 160, 161, 98,  84,  30,  224, 100, 16,  0,   163,
    117, 138, 230, 9,   221, 135, 131, 205, 144, 115, 246, 157, 191, 82,  216,
    200, 198, 129, 111, 19,  99,  233, 167, 159, 188, 41,  249, 47,  180, 120,
    6,   231, 113, 212, 171, 136, 141, 114, 185, 248, 172, 54,  42,  60,  241,
    64,  211, 187, 67,  21,  173, 119, 128, 130, 236, 39,  229, 133, 53,  12,
    65,  239, 147, 25,  33,  14,  78,  101, 189, 184, 143, 235, 206, 48,  95,
    197, 26,  225, 202, 71,  61,  1,   214, 86,  77,  13,  102, 204, 45,  18,
    32,  177, 153, 76,  194, 126, 5,   183, 49,  23,  215, 88,  97,  27,  28,
    15,  22,  24,  34,  68,  178, 181, 145, 8,   168, 252, 80,  208, 125, 137,
    151, 91,  149, 255, 210, 196, 72,  247, 219, 3,   218, 63,  148, 92,  2,
    74,  51,  103, 243, 127, 226, 155, 38,  55,  59,  150, 75,  190, 46,  121,
    140, 110, 142, 245, 182, 253, 89,  152, 106, 70,  186, 37,  66,  162, 250,
    7,   85,  238, 10,  73,  104, 56,  164, 40,  123, 201, 193, 227, 244, 199,
    158
};

#            define SBOX1(n) FSb[(n)]
#            define SBOX2(n) FSb2[(n)]
#            define SBOX3(n) FSb3[(n)]
#            define SBOX4(n) FSb4[(n)]

#        endif /* MBEDTLS_CAMELLIA_SMALL_MEMORY */

static const unsigned char shifts[2][4][4] = { {
                                                   { 1, 1, 1, 1 }, /* KL */
                                                   { 0, 0, 0, 0 }, /* KR */
                                                   { 1, 1, 1, 1 }, /* KA */
                                                   { 0, 0, 0, 0 } /* KB */
                                               },
                                               {
                                                   { 1, 0, 1, 1 }, /* KL */
                                                   { 1, 1, 0, 1 }, /* KR */
                                                   { 1, 1, 1, 0 }, /* KA */
                                                   { 1, 1, 0, 1 } /* KB */
                                               } };

static const signed char indexes[2][4][20] = {
    {
        { 0,  1,  2,  3,  8,  9,  10, 11, 38, 39,
          36, 37, 23, 20, 21, 22, 27, -1, -1, 26 }, /* KL -> RK */
        { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
          -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, /* KR -> RK */
        { 4,  5,  6,  7,  12, 13, 14, 15, 16, 17,
          18, 19, -1, 24, 25, -1, 31, 28, 29, 30 }, /* KA -> RK */
        { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
          -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 } /* KB -> RK */
    },
    {
        { 0,  1,  2,  3,  61, 62, 63, 60, -1, -1,
          -1, -1, 27, 24, 25, 26, 35, 32, 33, 34 }, /* KL -> RK */
        { -1, -1, -1, -1, 8,  9,  10, 11, 16, 17,
          18, 19, -1, -1, -1, -1, 39, 36, 37, 38 }, /* KR -> RK */
        { -1, -1, -1, -1, 12, 13, 14, 15, 58, 59,
          56, 57, 31, 28, 29, 30, -1, -1, -1, -1 }, /* KA -> RK */
        { 4,  5,  6,  7,  65, 66, 67, 64, 20, 21,
          22, 23, -1, -1, -1, -1, 43, 40, 41, 42 } /* KB -> RK */
    }
};

static const signed char transposes[2][20] = {
    { 21, 22, 23, 20, -1, -1, -1, -1, 18, 19,
      16, 17, 11, 8,  9,  10, 15, 12, 13, 14 },
    { 25, 26, 27, 24, 29, 30, 31, 28, 18, 19,
      16, 17, -1, -1, -1, -1, -1, -1, -1, -1 }
};

/* Shift macro for 128 bit strings with rotation smaller than 32 bits (!) */
#        define ROTL(DEST, SRC, SHIFT)                                        \
            {                                                                 \
                (DEST)[0] = (SRC)[0] << (SHIFT) ^ (SRC)[1] >> (32 - (SHIFT)); \
                (DEST)[1] = (SRC)[1] << (SHIFT) ^ (SRC)[2] >> (32 - (SHIFT)); \
                (DEST)[2] = (SRC)[2] << (SHIFT) ^ (SRC)[3] >> (32 - (SHIFT)); \
                (DEST)[3] = (SRC)[3] << (SHIFT) ^ (SRC)[0] >> (32 - (SHIFT)); \
            }

#        define FL(XL, XR, KL, KR)                                            \
            {                                                                 \
                (XR) = ((((XL) & (KL)) << 1) | (((XL) & (KL)) >> 31)) ^ (XR); \
                (XL) = ((XR) | (KR)) ^ (XL);                                  \
            }

#        define FLInv(YL, YR, KL, KR)                                         \
            {                                                                 \
                (YL) = ((YR) | (KR)) ^ (YL);                                  \
                (YR) = ((((YL) & (KL)) << 1) | (((YL) & (KL)) >> 31)) ^ (YR); \
            }

#        define SHIFT_AND_PLACE(INDEX, OFFSET)                     \
            {                                                      \
                TK[0] = KC[(OFFSET)*4 + 0];                        \
                TK[1] = KC[(OFFSET)*4 + 1];                        \
                TK[2] = KC[(OFFSET)*4 + 2];                        \
                TK[3] = KC[(OFFSET)*4 + 3];                        \
                                                                   \
                for (i = 1; i <= 4; i++)                           \
                    if (shifts[(INDEX)][(OFFSET)][i - 1])          \
                        ROTL(TK + i * 4, TK, (15 * i) % 32);       \
                                                                   \
                for (i = 0; i < 20; i++)                           \
                    if (indexes[(INDEX)][(OFFSET)][i] != -1) {     \
                        RK[indexes[(INDEX)][(OFFSET)][i]] = TK[i]; \
                    }                                              \
            }

static void
camellia_feistel(const uint32_t x[2], const uint32_t k[2], uint32_t z[2])
{
    uint32_t I0, I1;
    I0 = x[0] ^ k[0];
    I1 = x[1] ^ k[1];

    I0 = ((uint32_t)SBOX1((I0 >> 24) & 0xFF) << 24) |
         ((uint32_t)SBOX2((I0 >> 16) & 0xFF) << 16) |
         ((uint32_t)SBOX3((I0 >> 8) & 0xFF) << 8) |
         ((uint32_t)SBOX4((I0)&0xFF));
    I1 = ((uint32_t)SBOX2((I1 >> 24) & 0xFF) << 24) |
         ((uint32_t)SBOX3((I1 >> 16) & 0xFF) << 16) |
         ((uint32_t)SBOX4((I1 >> 8) & 0xFF) << 8) |
         ((uint32_t)SBOX1((I1)&0xFF));

    I0 ^= (I1 << 8) | (I1 >> 24);
    I1 ^= (I0 << 16) | (I0 >> 16);
    I0 ^= (I1 >> 8) | (I1 << 24);
    I1 ^= (I0 >> 8) | (I0 << 24);

    z[0] ^= I1;
    z[1] ^= I0;
}

void mbedtls_camellia_init(mbedtls_camellia_context *ctx)
{
    CAMELLIA_VALIDATE(ctx != NULL);
    memset(ctx, 0, sizeof(mbedtls_camellia_context));
}

void mbedtls_camellia_free(mbedtls_camellia_context *ctx)
{
    if (ctx == NULL)
        return;

    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_camellia_context));
}

/*
 * Camellia key schedule (encryption)
 */
int mbedtls_camellia_setkey_enc(mbedtls_camellia_context *ctx,
                                const unsigned char *key,
                                unsigned int keybits)
{
    int idx;
    size_t i;
    uint32_t *RK;
    unsigned char t[64];
    uint32_t SIGMA[6][2];
    uint32_t KC[16];
    uint32_t TK[20];

    CAMELLIA_VALIDATE_RET(ctx != NULL);
    CAMELLIA_VALIDATE_RET(key != NULL);

    RK = ctx->rk;

    memset(t, 0, 64);
    memset(RK, 0, sizeof(ctx->rk));

    switch (keybits) {
        case 128:
            ctx->nr = 3;
            idx = 0;
            break;
        case 192:
        case 256:
            ctx->nr = 4;
            idx = 1;
            break;
        default:
            return MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA;
    }

    for (i = 0; i < keybits / 8; ++i)
        t[i] = key[i];

    if (keybits == 192) {
        for (i = 0; i < 8; i++)
            t[24 + i] = ~t[16 + i];
    }

    /*
     * Prepare SIGMA values
     */
    for (i = 0; i < 6; i++) {
        GET_UINT32_BE(SIGMA[i][0], SIGMA_CHARS[i], 0);
        GET_UINT32_BE(SIGMA[i][1], SIGMA_CHARS[i], 4);
    }

    /*
     * Key storage in KC
     * Order: KL, KR, KA, KB
     */
    memset(KC, 0, sizeof(KC));

    /* Store KL, KR */
    for (i = 0; i < 8; i++)
        GET_UINT32_BE(KC[i], t, i * 4);

    /* Generate KA */
    for (i = 0; i < 4; ++i)
        KC[8 + i] = KC[i] ^ KC[4 + i];

    camellia_feistel(KC + 8, SIGMA[0], KC + 10);
    camellia_feistel(KC + 10, SIGMA[1], KC + 8);

    for (i = 0; i < 4; ++i)
        KC[8 + i] ^= KC[i];

    camellia_feistel(KC + 8, SIGMA[2], KC + 10);
    camellia_feistel(KC + 10, SIGMA[3], KC + 8);

    if (keybits > 128) {
        /* Generate KB */
        for (i = 0; i < 4; ++i)
            KC[12 + i] = KC[4 + i] ^ KC[8 + i];

        camellia_feistel(KC + 12, SIGMA[4], KC + 14);
        camellia_feistel(KC + 14, SIGMA[5], KC + 12);
    }

    /*
     * Generating subkeys
     */

    /* Manipulating KL */
    SHIFT_AND_PLACE(idx, 0);

    /* Manipulating KR */
    if (keybits > 128) {
        SHIFT_AND_PLACE(idx, 1);
    }

    /* Manipulating KA */
    SHIFT_AND_PLACE(idx, 2);

    /* Manipulating KB */
    if (keybits > 128) {
        SHIFT_AND_PLACE(idx, 3);
    }

    /* Do transpositions */
    for (i = 0; i < 20; i++) {
        if (transposes[idx][i] != -1) {
            RK[32 + 12 * idx + i] = RK[transposes[idx][i]];
        }
    }

    return 0;
}

/*
 * Camellia key schedule (decryption)
 */
int mbedtls_camellia_setkey_dec(mbedtls_camellia_context *ctx,
                                const unsigned char *key,
                                unsigned int keybits)
{
    int idx, ret;
    size_t i;
    mbedtls_camellia_context cty;
    uint32_t *RK;
    uint32_t *SK;
    CAMELLIA_VALIDATE_RET(ctx != NULL);
    CAMELLIA_VALIDATE_RET(key != NULL);

    mbedtls_camellia_init(&cty);

    /* Also checks keybits */
    if ((ret = mbedtls_camellia_setkey_enc(&cty, key, keybits)) != 0)
        goto exit;

    ctx->nr = cty.nr;
    idx = (ctx->nr == 4);

    RK = ctx->rk;
    SK = cty.rk + 24 * 2 + 8 * idx * 2;

    *RK++ = *SK++;
    *RK++ = *SK++;
    *RK++ = *SK++;
    *RK++ = *SK++;

    for (i = 22 + 8 * idx, SK -= 6; i > 0; i--, SK -= 4) {
        *RK++ = *SK++;
        *RK++ = *SK++;
    }

    SK -= 2;

    *RK++ = *SK++;
    *RK++ = *SK++;
    *RK++ = *SK++;
    *RK++ = *SK++;

exit:
    mbedtls_camellia_free(&cty);

    return ret;
}

/*
 * Camellia-ECB block encryption/decryption
 */
int mbedtls_camellia_crypt_ecb(mbedtls_camellia_context *ctx,
                               int mode,
                               const unsigned char input[16],
                               unsigned char output[16])
{
    int NR;
    uint32_t *RK, X[4];
    CAMELLIA_VALIDATE_RET(ctx != NULL);
    CAMELLIA_VALIDATE_RET(mode == MBEDTLS_CAMELLIA_ENCRYPT ||
                          mode == MBEDTLS_CAMELLIA_DECRYPT);
    CAMELLIA_VALIDATE_RET(input != NULL);
    CAMELLIA_VALIDATE_RET(output != NULL);

    ((void)mode);

    NR = ctx->nr;
    RK = ctx->rk;

    GET_UINT32_BE(X[0], input, 0);
    GET_UINT32_BE(X[1], input, 4);
    GET_UINT32_BE(X[2], input, 8);
    GET_UINT32_BE(X[3], input, 12);

    X[0] ^= *RK++;
    X[1] ^= *RK++;
    X[2] ^= *RK++;
    X[3] ^= *RK++;

    while (NR) {
        --NR;
        camellia_feistel(X, RK, X + 2);
        RK += 2;
        camellia_feistel(X + 2, RK, X);
        RK += 2;
        camellia_feistel(X, RK, X + 2);
        RK += 2;
        camellia_feistel(X + 2, RK, X);
        RK += 2;
        camellia_feistel(X, RK, X + 2);
        RK += 2;
        camellia_feistel(X + 2, RK, X);
        RK += 2;

        if (NR) {
            FL(X[0], X[1], RK[0], RK[1]);
            RK += 2;
            FLInv(X[2], X[3], RK[0], RK[1]);
            RK += 2;
        }
    }

    X[2] ^= *RK++;
    X[3] ^= *RK++;
    X[0] ^= *RK++;
    X[1] ^= *RK++;

    PUT_UINT32_BE(X[2], output, 0);
    PUT_UINT32_BE(X[3], output, 4);
    PUT_UINT32_BE(X[0], output, 8);
    PUT_UINT32_BE(X[1], output, 12);

    return 0;
}

#        if defined(MBEDTLS_CIPHER_MODE_CBC)
/*
 * Camellia-CBC buffer encryption/decryption
 */
int mbedtls_camellia_crypt_cbc(mbedtls_camellia_context *ctx,
                               int mode,
                               size_t length,
                               unsigned char iv[16],
                               const unsigned char *input,
                               unsigned char *output)
{
    int i;
    unsigned char temp[16];
    CAMELLIA_VALIDATE_RET(ctx != NULL);
    CAMELLIA_VALIDATE_RET(mode == MBEDTLS_CAMELLIA_ENCRYPT ||
                          mode == MBEDTLS_CAMELLIA_DECRYPT);
    CAMELLIA_VALIDATE_RET(iv != NULL);
    CAMELLIA_VALIDATE_RET(length == 0 || input != NULL);
    CAMELLIA_VALIDATE_RET(length == 0 || output != NULL);

    if (length % 16)
        return MBEDTLS_ERR_CAMELLIA_INVALID_INPUT_LENGTH;

    if (mode == MBEDTLS_CAMELLIA_DECRYPT) {
        while (length > 0) {
            memcpy(temp, input, 16);
            mbedtls_camellia_crypt_ecb(ctx, mode, input, output);

            for (i = 0; i < 16; i++)
                output[i] = (unsigned char)(output[i] ^ iv[i]);

            memcpy(iv, temp, 16);

            input += 16;
            output += 16;
            length -= 16;
        }
    } else {
        while (length > 0) {
            for (i = 0; i < 16; i++)
                output[i] = (unsigned char)(input[i] ^ iv[i]);

            mbedtls_camellia_crypt_ecb(ctx, mode, output, output);
            memcpy(iv, output, 16);

            input += 16;
            output += 16;
            length -= 16;
        }
    }

    return 0;
}
#        endif /* MBEDTLS_CIPHER_MODE_CBC */

#        if defined(MBEDTLS_CIPHER_MODE_CFB)
/*
 * Camellia-CFB128 buffer encryption/decryption
 */
int mbedtls_camellia_crypt_cfb128(mbedtls_camellia_context *ctx,
                                  int mode,
                                  size_t length,
                                  size_t *iv_off,
                                  unsigned char iv[16],
                                  const unsigned char *input,
                                  unsigned char *output)
{
    int c;
    size_t n;
    CAMELLIA_VALIDATE_RET(ctx != NULL);
    CAMELLIA_VALIDATE_RET(mode == MBEDTLS_CAMELLIA_ENCRYPT ||
                          mode == MBEDTLS_CAMELLIA_DECRYPT);
    CAMELLIA_VALIDATE_RET(iv != NULL);
    CAMELLIA_VALIDATE_RET(iv_off != NULL);
    CAMELLIA_VALIDATE_RET(length == 0 || input != NULL);
    CAMELLIA_VALIDATE_RET(length == 0 || output != NULL);

    n = *iv_off;
    if (n >= 16)
        return MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA;

    if (mode == MBEDTLS_CAMELLIA_DECRYPT) {
        while (length--) {
            if (n == 0)
                mbedtls_camellia_crypt_ecb(ctx, MBEDTLS_CAMELLIA_ENCRYPT, iv,
                                           iv);

            c = *input++;
            *output++ = (unsigned char)(c ^ iv[n]);
            iv[n] = (unsigned char)c;

            n = (n + 1) & 0x0F;
        }
    } else {
        while (length--) {
            if (n == 0)
                mbedtls_camellia_crypt_ecb(ctx, MBEDTLS_CAMELLIA_ENCRYPT, iv,
                                           iv);

            iv[n] = *output++ = (unsigned char)(iv[n] ^ *input++);

            n = (n + 1) & 0x0F;
        }
    }

    *iv_off = n;

    return 0;
}
#        endif /* MBEDTLS_CIPHER_MODE_CFB */

#        if defined(MBEDTLS_CIPHER_MODE_CTR)
/*
 * Camellia-CTR buffer encryption/decryption
 */
int mbedtls_camellia_crypt_ctr(mbedtls_camellia_context *ctx,
                               size_t length,
                               size_t *nc_off,
                               unsigned char nonce_counter[16],
                               unsigned char stream_block[16],
                               const unsigned char *input,
                               unsigned char *output)
{
    int c, i;
    size_t n;
    CAMELLIA_VALIDATE_RET(ctx != NULL);
    CAMELLIA_VALIDATE_RET(nonce_counter != NULL);
    CAMELLIA_VALIDATE_RET(stream_block != NULL);
    CAMELLIA_VALIDATE_RET(nc_off != NULL);
    CAMELLIA_VALIDATE_RET(length == 0 || input != NULL);
    CAMELLIA_VALIDATE_RET(length == 0 || output != NULL);

    n = *nc_off;
    if (n >= 16)
        return MBEDTLS_ERR_CAMELLIA_BAD_INPUT_DATA;

    while (length--) {
        if (n == 0) {
            mbedtls_camellia_crypt_ecb(ctx, MBEDTLS_CAMELLIA_ENCRYPT,
                                       nonce_counter, stream_block);

            for (i = 16; i > 0; i--)
                if (++nonce_counter[i - 1] != 0)
                    break;
        }
        c = *input++;
        *output++ = (unsigned char)(c ^ stream_block[n]);

        n = (n + 1) & 0x0F;
    }

    *nc_off = n;

    return 0;
}
#        endif /* MBEDTLS_CIPHER_MODE_CTR */
#    endif /* !MBEDTLS_CAMELLIA_ALT */

#    if defined(MBEDTLS_SELF_TEST)

/*
 * Camellia test vectors from:
 *
 * http://info.isl.ntt.co.jp/crypt/eng/camellia/technology.html:
 *   http://info.isl.ntt.co.jp/crypt/eng/camellia/dl/cryptrec/intermediate.txt
 *   http://info.isl.ntt.co.jp/crypt/eng/camellia/dl/cryptrec/t_camellia.txt
 *                      (For each bitlength: Key 0, Nr 39)
 */
#        define CAMELLIA_TESTS_ECB 2

static const unsigned char
    camellia_test_ecb_key[3][CAMELLIA_TESTS_ECB][32] = {
        { { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba,
            0x98, 0x76, 0x54, 0x32, 0x10 },
          { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00 } },
        { { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
            0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10,
            0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77 },
          { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
        { { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba,
            0x98, 0x76, 0x54, 0x32, 0x10, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55,
            0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff },
          { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } },
    };

static const unsigned char camellia_test_ecb_plain[CAMELLIA_TESTS_ECB][16] = {
    { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98,
      0x76, 0x54, 0x32, 0x10 },
    { 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00 }
};

static const unsigned char camellia_test_ecb_cipher[3][CAMELLIA_TESTS_ECB][16] = {
    { { 0x67, 0x67, 0x31, 0x38, 0x54, 0x96, 0x69, 0x73, 0x08, 0x57, 0x06, 0x56,
        0x48, 0xea, 0xbe, 0x43 },
      { 0x38, 0x3C, 0x6C, 0x2A, 0xAB, 0xEF, 0x7F, 0xDE, 0x25, 0xCD, 0x47, 0x0B,
        0xF7, 0x74, 0xA3, 0x31 } },
    { { 0xb4, 0x99, 0x34, 0x01, 0xb3, 0xe9, 0x96, 0xf8, 0x4e, 0xe5, 0xce, 0xe7,
        0xd7, 0x9b, 0x09, 0xb9 },
      { 0xD1, 0x76, 0x3F, 0xC0, 0x19, 0xD7, 0x7C, 0xC9, 0x30, 0xBF, 0xF2, 0xA5,
        0x6F, 0x7C, 0x93, 0x64 } },
    { { 0x9a, 0xcc, 0x23, 0x7d, 0xff, 0x16, 0xd7, 0x6c, 0x20, 0xef, 0x7c, 0x91,
        0x9e, 0x3a, 0x75, 0x09 },
      { 0x05, 0x03, 0xFB, 0x10, 0xAB, 0x24, 0x1E, 0x7C, 0xF4, 0x5D, 0x8C, 0xDE,
        0xEE, 0x47, 0x43, 0x35 } }
};

#        if defined(MBEDTLS_CIPHER_MODE_CBC)
#            define CAMELLIA_TESTS_CBC 3

static const unsigned char camellia_test_cbc_key[3][32] = {
    { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88,
      0x09, 0xCF, 0x4F, 0x3C },
    { 0x8E, 0x73, 0xB0, 0xF7, 0xDA, 0x0E, 0x64, 0x52, 0xC8, 0x10, 0xF3, 0x2B,
      0x80, 0x90, 0x79, 0xE5, 0x62, 0xF8, 0xEA, 0xD2, 0x52, 0x2C, 0x6B, 0x7B },
    { 0x60, 0x3D, 0xEB, 0x10, 0x15, 0xCA, 0x71, 0xBE, 0x2B, 0x73, 0xAE,
      0xF0, 0x85, 0x7D, 0x77, 0x81, 0x1F, 0x35, 0x2C, 0x07, 0x3B, 0x61,
      0x08, 0xD7, 0x2D, 0x98, 0x10, 0xA3, 0x09, 0x14, 0xDF, 0xF4 }
};

static const unsigned char camellia_test_cbc_iv[16] =

    { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
      0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F };

static const unsigned char camellia_test_cbc_plain[CAMELLIA_TESTS_CBC][16] = {
    { 0x6B, 0xC1, 0xBE, 0xE2, 0x2E, 0x40, 0x9F, 0x96, 0xE9, 0x3D, 0x7E, 0x11,
      0x73, 0x93, 0x17, 0x2A },
    { 0xAE, 0x2D, 0x8A, 0x57, 0x1E, 0x03, 0xAC, 0x9C, 0x9E, 0xB7, 0x6F, 0xAC,
      0x45, 0xAF, 0x8E, 0x51 },
    { 0x30, 0xC8, 0x1C, 0x46, 0xA3, 0x5C, 0xE4, 0x11, 0xE5, 0xFB, 0xC1, 0x19,
      0x1A, 0x0A, 0x52, 0xEF }

};

static const unsigned char camellia_test_cbc_cipher[3][CAMELLIA_TESTS_CBC][16] = {
    { { 0x16, 0x07, 0xCF, 0x49, 0x4B, 0x36, 0xBB, 0xF0, 0x0D, 0xAE, 0xB0, 0xB5,
        0x03, 0xC8, 0x31, 0xAB },
      { 0xA2, 0xF2, 0xCF, 0x67, 0x16, 0x29, 0xEF, 0x78, 0x40, 0xC5, 0xA5, 0xDF,
        0xB5, 0x07, 0x48, 0x87 },
      { 0x0F, 0x06, 0x16, 0x50, 0x08, 0xCF, 0x8B, 0x8B, 0x5A, 0x63, 0x58, 0x63,
        0x62, 0x54, 0x3E, 0x54 } },
    { { 0x2A, 0x48, 0x30, 0xAB, 0x5A, 0xC4, 0xA1, 0xA2, 0x40, 0x59, 0x55, 0xFD,
        0x21, 0x95, 0xCF, 0x93 },
      { 0x5D, 0x5A, 0x86, 0x9B, 0xD1, 0x4C, 0xE5, 0x42, 0x64, 0xF8, 0x92, 0xA6,
        0xDD, 0x2E, 0xC3, 0xD5 },
      { 0x37, 0xD3, 0x59, 0xC3, 0x34, 0x98, 0x36, 0xD8, 0x84, 0xE3, 0x10, 0xAD,
        0xDF, 0x68, 0xC4, 0x49 } },
    { { 0xE6, 0xCF, 0xA3, 0x5F, 0xC0, 0x2B, 0x13, 0x4A, 0x4D, 0x2C, 0x0B, 0x67,
        0x37, 0xAC, 0x3E, 0xDA },
      { 0x36, 0xCB, 0xEB, 0x73, 0xBD, 0x50, 0x4B, 0x40, 0x70, 0xB1, 0xB7, 0xDE,
        0x2B, 0x21, 0xEB, 0x50 },
      { 0xE3, 0x1A, 0x60, 0x55, 0x29, 0x7D, 0x96, 0xCA, 0x33, 0x30, 0xCD, 0xF1,
        0xB1, 0x86, 0x0A, 0x83 } }
};
#        endif /* MBEDTLS_CIPHER_MODE_CBC */

#        if defined(MBEDTLS_CIPHER_MODE_CTR)
/*
 * Camellia-CTR test vectors from:
 *
 * http://www.faqs.org/rfcs/rfc5528.html
 */

static const unsigned char camellia_test_ctr_key[3][16] = {
    { 0xAE, 0x68, 0x52, 0xF8, 0x12, 0x10, 0x67, 0xCC, 0x4B, 0xF7, 0xA5, 0x76,
      0x55, 0x77, 0xF3, 0x9E },
    { 0x7E, 0x24, 0x06, 0x78, 0x17, 0xFA, 0xE0, 0xD7, 0x43, 0xD6, 0xCE, 0x1F,
      0x32, 0x53, 0x91, 0x63 },
    { 0x76, 0x91, 0xBE, 0x03, 0x5E, 0x50, 0x20, 0xA8, 0xAC, 0x6E, 0x61, 0x85,
      0x29, 0xF9, 0xA0, 0xDC }
};

static const unsigned char camellia_test_ctr_nonce_counter[3][16] = {
    { 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x01 },
    { 0x00, 0x6C, 0xB6, 0xDB, 0xC0, 0x54, 0x3B, 0x59, 0xDA, 0x48, 0xD9, 0x0B,
      0x00, 0x00, 0x00, 0x01 },
    { 0x00, 0xE0, 0x01, 0x7B, 0x27, 0x77, 0x7F, 0x3F, 0x4A, 0x17, 0x86, 0xF0,
      0x00, 0x00, 0x00, 0x01 }
};

static const unsigned char camellia_test_ctr_pt[3][48] = {
    { 0x53, 0x69, 0x6E, 0x67, 0x6C, 0x65, 0x20, 0x62, 0x6C, 0x6F, 0x63, 0x6B,
      0x20, 0x6D, 0x73, 0x67 },

    { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
      0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
      0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F },

    { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
      0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
      0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23 }
};

static const unsigned char camellia_test_ctr_ct[3][48] = {
    { 0xD0, 0x9D, 0xC2, 0x9A, 0x82, 0x14, 0x61, 0x9A, 0x20, 0x87, 0x7C, 0x76,
      0xDB, 0x1F, 0x0B, 0x3F },
    { 0xDB, 0xF3, 0xC7, 0x8D, 0xC0, 0x83, 0x96, 0xD4, 0xDA, 0x7C, 0x90,
      0x77, 0x65, 0xBB, 0xCB, 0x44, 0x2B, 0x8E, 0x8E, 0x0F, 0x31, 0xF0,
      0xDC, 0xA7, 0x2C, 0x74, 0x17, 0xE3, 0x53, 0x60, 0xE0, 0x48 },
    { 0xB1, 0x9D, 0x1F, 0xCD, 0xCB, 0x75, 0xEB, 0x88, 0x2F, 0x84, 0x9C, 0xE2,
      0x4D, 0x85, 0xCF, 0x73, 0x9C, 0xE6, 0x4B, 0x2B, 0x5C, 0x9D, 0x73, 0xF1,
      0x4F, 0x2D, 0x5D, 0x9D, 0xCE, 0x98, 0x89, 0xCD, 0xDF, 0x50, 0x86, 0x96 }
};

static const int camellia_test_ctr_len[3] = { 16, 32, 36 };
#        endif /* MBEDTLS_CIPHER_MODE_CTR */

/*
 * Checkup routine
 */
int mbedtls_camellia_self_test(int verbose)
{
    int i, j, u, v;
    unsigned char key[32];
    unsigned char buf[64];
    unsigned char src[16];
    unsigned char dst[16];
#        if defined(MBEDTLS_CIPHER_MODE_CBC)
    unsigned char iv[16];
#        endif
#        if defined(MBEDTLS_CIPHER_MODE_CTR)
    size_t offset, len;
    unsigned char nonce_counter[16];
    unsigned char stream_block[16];
#        endif
    int ret = 1;

    mbedtls_camellia_context ctx;

    mbedtls_camellia_init(&ctx);
    memset(key, 0, 32);

    for (j = 0; j < 6; j++) {
        u = j >> 1;
        v = j & 1;

        if (verbose != 0)
            mbedtls_printf("  CAMELLIA-ECB-%3d (%s): ", 128 + u * 64,
                           (v == MBEDTLS_CAMELLIA_DECRYPT) ? "dec" : "enc");

        for (i = 0; i < CAMELLIA_TESTS_ECB; i++) {
            memcpy(key, camellia_test_ecb_key[u][i], 16 + 8 * u);

            if (v == MBEDTLS_CAMELLIA_DECRYPT) {
                mbedtls_camellia_setkey_dec(&ctx, key, 128 + u * 64);
                memcpy(src, camellia_test_ecb_cipher[u][i], 16);
                memcpy(dst, camellia_test_ecb_plain[i], 16);
            } else { /* MBEDTLS_CAMELLIA_ENCRYPT */
                mbedtls_camellia_setkey_enc(&ctx, key, 128 + u * 64);
                memcpy(src, camellia_test_ecb_plain[i], 16);
                memcpy(dst, camellia_test_ecb_cipher[u][i], 16);
            }

            mbedtls_camellia_crypt_ecb(&ctx, v, src, buf);

            if (memcmp(buf, dst, 16) != 0) {
                if (verbose != 0)
                    mbedtls_printf("failed\n");
                goto exit;
            }
        }

        if (verbose != 0)
            mbedtls_printf("passed\n");
    }

    if (verbose != 0)
        mbedtls_printf("\n");

#        if defined(MBEDTLS_CIPHER_MODE_CBC)
    /*
     * CBC mode
     */
    for (j = 0; j < 6; j++) {
        u = j >> 1;
        v = j & 1;

        if (verbose != 0)
            mbedtls_printf("  CAMELLIA-CBC-%3d (%s): ", 128 + u * 64,
                           (v == MBEDTLS_CAMELLIA_DECRYPT) ? "dec" : "enc");

        memcpy(src, camellia_test_cbc_iv, 16);
        memcpy(dst, camellia_test_cbc_iv, 16);
        memcpy(key, camellia_test_cbc_key[u], 16 + 8 * u);

        if (v == MBEDTLS_CAMELLIA_DECRYPT) {
            mbedtls_camellia_setkey_dec(&ctx, key, 128 + u * 64);
        } else {
            mbedtls_camellia_setkey_enc(&ctx, key, 128 + u * 64);
        }

        for (i = 0; i < CAMELLIA_TESTS_CBC; i++) {
            if (v == MBEDTLS_CAMELLIA_DECRYPT) {
                memcpy(iv, src, 16);
                memcpy(src, camellia_test_cbc_cipher[u][i], 16);
                memcpy(dst, camellia_test_cbc_plain[i], 16);
            } else { /* MBEDTLS_CAMELLIA_ENCRYPT */
                memcpy(iv, dst, 16);
                memcpy(src, camellia_test_cbc_plain[i], 16);
                memcpy(dst, camellia_test_cbc_cipher[u][i], 16);
            }

            mbedtls_camellia_crypt_cbc(&ctx, v, 16, iv, src, buf);

            if (memcmp(buf, dst, 16) != 0) {
                if (verbose != 0)
                    mbedtls_printf("failed\n");
                goto exit;
            }
        }

        if (verbose != 0)
            mbedtls_printf("passed\n");
    }
#        endif /* MBEDTLS_CIPHER_MODE_CBC */

    if (verbose != 0)
        mbedtls_printf("\n");

#        if defined(MBEDTLS_CIPHER_MODE_CTR)
    /*
     * CTR mode
     */
    for (i = 0; i < 6; i++) {
        u = i >> 1;
        v = i & 1;

        if (verbose != 0)
            mbedtls_printf("  CAMELLIA-CTR-128 (%s): ",
                           (v == MBEDTLS_CAMELLIA_DECRYPT) ? "dec" : "enc");

        memcpy(nonce_counter, camellia_test_ctr_nonce_counter[u], 16);
        memcpy(key, camellia_test_ctr_key[u], 16);

        offset = 0;
        mbedtls_camellia_setkey_enc(&ctx, key, 128);

        if (v == MBEDTLS_CAMELLIA_DECRYPT) {
            len = camellia_test_ctr_len[u];
            memcpy(buf, camellia_test_ctr_ct[u], len);

            mbedtls_camellia_crypt_ctr(&ctx, len, &offset, nonce_counter,
                                       stream_block, buf, buf);

            if (memcmp(buf, camellia_test_ctr_pt[u], len) != 0) {
                if (verbose != 0)
                    mbedtls_printf("failed\n");
                goto exit;
            }
        } else {
            len = camellia_test_ctr_len[u];
            memcpy(buf, camellia_test_ctr_pt[u], len);

            mbedtls_camellia_crypt_ctr(&ctx, len, &offset, nonce_counter,
                                       stream_block, buf, buf);

            if (memcmp(buf, camellia_test_ctr_ct[u], len) != 0) {
                if (verbose != 0)
                    mbedtls_printf("failed\n");
                goto exit;
            }
        }

        if (verbose != 0)
            mbedtls_printf("passed\n");
    }

    if (verbose != 0)
        mbedtls_printf("\n");
#        endif /* MBEDTLS_CIPHER_MODE_CTR */

    ret = 0;

exit:
    mbedtls_camellia_free(&ctx);
    return ret;
}

#    endif /* MBEDTLS_SELF_TEST */

#endif /* MBEDTLS_CAMELLIA_C */