/*

 *  FIPS-202 compliant SHA3 implementation

 *

 *  Copyright The Mbed TLS Contributors

 *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later

 */

/*

 *  The SHA-3 Secure Hash Standard was published by NIST in 2015.

 *

 *  https://nvlpubs.nist.gov/nistpubs/fips/nist.fips.202.pdf

 */

#include "common.h"

#if defined(MBEDTLS_SHA3_C)

/*

 * These macros select manually unrolled implementations of parts of the main permutation function.

 *

 * Unrolling has a major impact on both performance and code size. gcc performance benefits a lot

 * from manually unrolling at higher optimisation levels.

 *

 * Depending on your size/perf priorities, compiler and target, it may be beneficial to adjust

 * these; the defaults here should give sensible trade-offs for gcc and clang on aarch64 and

 * x86-64.

 */

#if !defined(MBEDTLS_SHA3_THETA_UNROLL)

    #define MBEDTLS_SHA3_THETA_UNROLL 0 //no-check-names

#endif

#if !defined(MBEDTLS_SHA3_CHI_UNROLL)

    #if defined(__OPTIMIZE_SIZE__)

        #define MBEDTLS_SHA3_CHI_UNROLL 0 //no-check-names

    #else

        #define MBEDTLS_SHA3_CHI_UNROLL 1 //no-check-names

    #endif

#endif

#if !defined(MBEDTLS_SHA3_PI_UNROLL)

    #define MBEDTLS_SHA3_PI_UNROLL 1 //no-check-names

#endif

#if !defined(MBEDTLS_SHA3_RHO_UNROLL)

    #define MBEDTLS_SHA3_RHO_UNROLL 1 //no-check-names

#endif

#include "mbedtls/sha3.h"

#include "mbedtls/platform_util.h"

#include "mbedtls/error.h"

#include <string.h>

#if defined(MBEDTLS_SELF_TEST)

#include "mbedtls/platform.h"

#endif /* MBEDTLS_SELF_TEST */

#define XOR_BYTE 0x6

/* Precomputed masks for the iota transform.

 *

 * Each round uses a 64-bit mask value. In each mask values, only

 * bits whose position is of the form 2^k-1 can be set, thus only

 * 7 of 64 bits of the mask need to be known for each mask value.

 *

 * We use a compressed encoding of the mask where bits 63, 31 and 15

 * are moved to bits 4-6. This allows us to make each mask value

 * 1 byte rather than 8 bytes, saving 7*24 = 168 bytes of data (with

 * perhaps a little variation due to alignment). Decompressing this

 * requires a little code, but much less than the savings on the table.

 *

 * The impact on performance depends on the platform and compiler.

 * There's a bit more computation, but less memory bandwidth. A quick

 * benchmark on x86_64 shows a 7% speed improvement with GCC and a

 * 5% speed penalty with Clang, compared to the naive uint64_t[24] table.

 * YMMV.

 */

/* Helper macro to set the values of the higher bits in unused low positions */

#define H(b63, b31, b15) (b63 << 6 | b31 << 5 | b15 << 4)

static const uint8_t iota_r_packed[24] = {

    H(0, 0, 0) | 0x01, H(0, 0, 1) | 0x82, H(1, 0, 1) | 0x8a, H(1, 1, 1) | 0x00,

    H(0, 0, 1) | 0x8b, H(0, 1, 0) | 0x01, H(1, 1, 1) | 0x81, H(1, 0, 1) | 0x09,

    H(0, 0, 0) | 0x8a, H(0, 0, 0) | 0x88, H(0, 1, 1) | 0x09, H(0, 1, 0) | 0x0a,

    H(0, 1, 1) | 0x8b, H(1, 0, 0) | 0x8b, H(1, 0, 1) | 0x89, H(1, 0, 1) | 0x03,

    H(1, 0, 1) | 0x02, H(1, 0, 0) | 0x80, H(0, 0, 1) | 0x0a, H(1, 1, 0) | 0x0a,

    H(1, 1, 1) | 0x81, H(1, 0, 1) | 0x80, H(0, 1, 0) | 0x01, H(1, 1, 1) | 0x08,

};

#undef H

static const uint32_t rho[6] = {

    0x3f022425, 0x1c143a09, 0x2c3d3615, 0x27191713, 0x312b382e, 0x3e030832

};

static const uint32_t pi[6] = {

    0x110b070a, 0x10050312, 0x04181508, 0x0d13170f, 0x0e14020c, 0x01060916

};

#define ROTR64(x, y) (((x) << (64U - (y))) | ((x) >> (y))) // 64-bit rotate right

#define ABSORB(ctx, idx, v) do { ctx->state[(idx) >> 3] ^= ((uint64_t) (v)) << (((idx) & 0x7) << 3); \

} while (0)

#define SQUEEZE(ctx, idx) ((uint8_t) (ctx->state[(idx) >> 3] >> (((idx) & 0x7) << 3)))

#define SWAP(x, y) do { uint64_t tmp = (x); (x) = (y); (y) = tmp; } while (0)

/* The permutation function.  */

static void keccak_f1600(mbedtls_sha3_context *ctx)

{

    uint64_t lane[5];

    uint64_t *s = ctx->state;

    int i;

    for (int round = 0; round < 24; round++) {

        uint64_t t;

        /* Theta */

#if MBEDTLS_SHA3_THETA_UNROLL == 0 //no-check-names

        for (i = 0; i < 5; i++) {

            lane[i] = s[i] ^ s[i + 5] ^ s[i + 10] ^ s[i + 15] ^ s[i + 20];

        }

        for (i = 0; i < 5; i++) {

            t = lane[(i + 4) % 5] ^ ROTR64(lane[(i + 1) % 5], 63);

            s[i] ^= t; s[i + 5] ^= t; s[i + 10] ^= t; s[i + 15] ^= t; s[i + 20] ^= t;

        }

#else

        lane[0] = s[0] ^ s[5] ^ s[10] ^ s[15] ^ s[20];

        lane[1] = s[1] ^ s[6] ^ s[11] ^ s[16] ^ s[21];

        lane[2] = s[2] ^ s[7] ^ s[12] ^ s[17] ^ s[22];

        lane[3] = s[3] ^ s[8] ^ s[13] ^ s[18] ^ s[23];

        lane[4] = s[4] ^ s[9] ^ s[14] ^ s[19] ^ s[24];

        t = lane[4] ^ ROTR64(lane[1], 63);

        s[0] ^= t; s[5] ^= t; s[10] ^= t; s[15] ^= t; s[20] ^= t;

        t = lane[0] ^ ROTR64(lane[2], 63);

        s[1] ^= t; s[6] ^= t; s[11] ^= t; s[16] ^= t; s[21] ^= t;

        t = lane[1] ^ ROTR64(lane[3], 63);

        s[2] ^= t; s[7] ^= t; s[12] ^= t; s[17] ^= t; s[22] ^= t;

        t = lane[2] ^ ROTR64(lane[4], 63);

        s[3] ^= t; s[8] ^= t; s[13] ^= t; s[18] ^= t; s[23] ^= t;

        t = lane[3] ^ ROTR64(lane[0], 63);

        s[4] ^= t; s[9] ^= t; s[14] ^= t; s[19] ^= t; s[24] ^= t;

#endif

        /* Rho */

        for (i = 1; i < 25; i += 4) {

            uint32_t r = rho[(i - 1) >> 2];

#if MBEDTLS_SHA3_RHO_UNROLL == 0

            for (int j = i; j < i + 4; j++) {

                uint8_t r8 = (uint8_t) (r >> 24);

                r <<= 8;

                s[j] = ROTR64(s[j], r8);

            }

#else

            s[i + 0] = ROTR64(s[i + 0], MBEDTLS_BYTE_3(r));

            s[i + 1] = ROTR64(s[i + 1], MBEDTLS_BYTE_2(r));

            s[i + 2] = ROTR64(s[i + 2], MBEDTLS_BYTE_1(r));

            s[i + 3] = ROTR64(s[i + 3], MBEDTLS_BYTE_0(r));

#endif

        }

        /* Pi */

        t = s[1];

#if MBEDTLS_SHA3_PI_UNROLL == 0

        for (i = 0; i < 24; i += 4) {

            uint32_t p = pi[i >> 2];

            for (unsigned j = 0; j < 4; j++) {

                SWAP(s[p & 0xff], t);

                p >>= 8;

            }

        }

#else

        uint32_t p = pi[0];

        SWAP(s[MBEDTLS_BYTE_0(p)], t); SWAP(s[MBEDTLS_BYTE_1(p)], t);

        SWAP(s[MBEDTLS_BYTE_2(p)], t); SWAP(s[MBEDTLS_BYTE_3(p)], t);

        p = pi[1];

        SWAP(s[MBEDTLS_BYTE_0(p)], t); SWAP(s[MBEDTLS_BYTE_1(p)], t);

        SWAP(s[MBEDTLS_BYTE_2(p)], t); SWAP(s[MBEDTLS_BYTE_3(p)], t);

        p = pi[2];

        SWAP(s[MBEDTLS_BYTE_0(p)], t); SWAP(s[MBEDTLS_BYTE_1(p)], t);

        SWAP(s[MBEDTLS_BYTE_2(p)], t); SWAP(s[MBEDTLS_BYTE_3(p)], t);

        p = pi[3];

        SWAP(s[MBEDTLS_BYTE_0(p)], t); SWAP(s[MBEDTLS_BYTE_1(p)], t);

        SWAP(s[MBEDTLS_BYTE_2(p)], t); SWAP(s[MBEDTLS_BYTE_3(p)], t);

        p = pi[4];

        SWAP(s[MBEDTLS_BYTE_0(p)], t); SWAP(s[MBEDTLS_BYTE_1(p)], t);

        SWAP(s[MBEDTLS_BYTE_2(p)], t); SWAP(s[MBEDTLS_BYTE_3(p)], t);

        p = pi[5];

        SWAP(s[MBEDTLS_BYTE_0(p)], t); SWAP(s[MBEDTLS_BYTE_1(p)], t);

        SWAP(s[MBEDTLS_BYTE_2(p)], t); SWAP(s[MBEDTLS_BYTE_3(p)], t);

#endif

        /* Chi */

#if MBEDTLS_SHA3_CHI_UNROLL == 0 //no-check-names

        for (i = 0; i <= 20; i += 5) {

            lane[0] = s[i]; lane[1] = s[i + 1]; lane[2] = s[i + 2];

            lane[3] = s[i + 3]; lane[4] = s[i + 4];

            s[i + 0] ^= (~lane[1]) & lane[2];

            s[i + 1] ^= (~lane[2]) & lane[3];

            s[i + 2] ^= (~lane[3]) & lane[4];

            s[i + 3] ^= (~lane[4]) & lane[0];

            s[i + 4] ^= (~lane[0]) & lane[1];

        }

#else

        lane[0] = s[0]; lane[1] = s[1]; lane[2] = s[2]; lane[3] = s[3]; lane[4] = s[4];

        s[0] ^= (~lane[1]) & lane[2];

        s[1] ^= (~lane[2]) & lane[3];

        s[2] ^= (~lane[3]) & lane[4];

        s[3] ^= (~lane[4]) & lane[0];

        s[4] ^= (~lane[0]) & lane[1];

        lane[0] = s[5]; lane[1] = s[6]; lane[2] = s[7]; lane[3] = s[8]; lane[4] = s[9];

        s[5] ^= (~lane[1]) & lane[2];

        s[6] ^= (~lane[2]) & lane[3];

        s[7] ^= (~lane[3]) & lane[4];

        s[8] ^= (~lane[4]) & lane[0];

        s[9] ^= (~lane[0]) & lane[1];

        lane[0] = s[10]; lane[1] = s[11]; lane[2] = s[12]; lane[3] = s[13]; lane[4] = s[14];

        s[10] ^= (~lane[1]) & lane[2];

        s[11] ^= (~lane[2]) & lane[3];

        s[12] ^= (~lane[3]) & lane[4];

        s[13] ^= (~lane[4]) & lane[0];

        s[14] ^= (~lane[0]) & lane[1];

        lane[0] = s[15]; lane[1] = s[16]; lane[2] = s[17]; lane[3] = s[18]; lane[4] = s[19];

        s[15] ^= (~lane[1]) & lane[2];

        s[16] ^= (~lane[2]) & lane[3];

        s[17] ^= (~lane[3]) & lane[4];

        s[18] ^= (~lane[4]) & lane[0];

        s[19] ^= (~lane[0]) & lane[1];

        lane[0] = s[20]; lane[1] = s[21]; lane[2] = s[22]; lane[3] = s[23]; lane[4] = s[24];

        s[20] ^= (~lane[1]) & lane[2];

        s[21] ^= (~lane[2]) & lane[3];

        s[22] ^= (~lane[3]) & lane[4];

        s[23] ^= (~lane[4]) & lane[0];

        s[24] ^= (~lane[0]) & lane[1];

#endif

        /* Iota */

        /* Decompress the round masks (see definition of rc) */

        s[0] ^= ((iota_r_packed[round] & 0x40ull) << 57 |

                 (iota_r_packed[round] & 0x20ull) << 26 |

                 (iota_r_packed[round] & 0x10ull) << 11 |

                 (iota_r_packed[round] & 0x8f));

    }

}

void mbedtls_sha3_init(mbedtls_sha3_context *ctx)

{

    memset(ctx, 0, sizeof(mbedtls_sha3_context));

}

void mbedtls_sha3_free(mbedtls_sha3_context *ctx)

{

    if (ctx == NULL) {

        return;

    }

    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_sha3_context));

}

void mbedtls_sha3_clone(mbedtls_sha3_context *dst,

                        const mbedtls_sha3_context *src)

{

    *dst = *src;

}

/*

 * SHA-3 context setup

 */

int mbedtls_sha3_starts(mbedtls_sha3_context *ctx, mbedtls_sha3_id id)

{

    switch (id) {

        case MBEDTLS_SHA3_224:

            ctx->olen = 224 / 8;

            ctx->max_block_size = 1152 / 8;

            break;

        case MBEDTLS_SHA3_256:

            ctx->olen = 256 / 8;

            ctx->max_block_size = 1088 / 8;

            break;

        case MBEDTLS_SHA3_384:

            ctx->olen = 384 / 8;

            ctx->max_block_size = 832 / 8;

            break;

        case MBEDTLS_SHA3_512:

            ctx->olen = 512 / 8;

            ctx->max_block_size = 576 / 8;

            break;

        default:

            return MBEDTLS_ERR_SHA3_BAD_INPUT_DATA;

    }

    memset(ctx->state, 0, sizeof(ctx->state));

    ctx->index = 0;

    return 0;

}

/*

 * SHA-3 process buffer

 */

int mbedtls_sha3_update(mbedtls_sha3_context *ctx,

                        const uint8_t *input,

                        size_t ilen)

{

    if (ilen >= 8) {

        // 8-byte align index

        int align_bytes = 8 - (ctx->index % 8);

        if (align_bytes) {

            for (; align_bytes > 0; align_bytes--) {

                ABSORB(ctx, ctx->index, *input++);

                ilen--;

                ctx->index++;

            }

            if ((ctx->index = ctx->index % ctx->max_block_size) == 0) {

                keccak_f1600(ctx);

            }

        }

        // process input in 8-byte chunks

        while (ilen >= 8) {

            ABSORB(ctx, ctx->index, MBEDTLS_GET_UINT64_LE(input, 0));

            input += 8;

            ilen -= 8;

            if ((ctx->index = (ctx->index + 8) % ctx->max_block_size) == 0) {

                keccak_f1600(ctx);

            }

        }

    }

    // handle remaining bytes

    while (ilen-- > 0) {

        ABSORB(ctx, ctx->index, *input++);

        if ((ctx->index = (ctx->index + 1) % ctx->max_block_size) == 0) {

            keccak_f1600(ctx);

        }

    }

    return 0;

}

int mbedtls_sha3_finish(mbedtls_sha3_context *ctx,

                        uint8_t *output, size_t olen)

{

    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;

    /* Catch SHA-3 families, with fixed output length */

    if (ctx->olen > 0) {

        if (ctx->olen > olen) {

            ret = MBEDTLS_ERR_SHA3_BAD_INPUT_DATA;

            goto exit;

        }

        olen = ctx->olen;

    }

    ABSORB(ctx, ctx->index, XOR_BYTE);

    ABSORB(ctx, ctx->max_block_size - 1, 0x80);

    keccak_f1600(ctx);

    ctx->index = 0;

    while (olen-- > 0) {

        *output++ = SQUEEZE(ctx, ctx->index);

        if ((ctx->index = (ctx->index + 1) % ctx->max_block_size) == 0) {

            keccak_f1600(ctx);

        }

    }

    ret = 0;

exit:

    mbedtls_sha3_free(ctx);

    return ret;

}

/*

 * output = SHA-3( input buffer )

 */

int mbedtls_sha3(mbedtls_sha3_id id, const uint8_t *input,

                 size_t ilen, uint8_t *output, size_t olen)

{

    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;

    mbedtls_sha3_context ctx;

    mbedtls_sha3_init(&ctx);

    /* Sanity checks are performed in every mbedtls_sha3_xxx() */

    if ((ret = mbedtls_sha3_starts(&ctx, id)) != 0) {

        goto exit;

    }

    if ((ret = mbedtls_sha3_update(&ctx, input, ilen)) != 0) {

        goto exit;

    }

    if ((ret = mbedtls_sha3_finish(&ctx, output, olen)) != 0) {

        goto exit;

    }

exit:

    mbedtls_sha3_free(&ctx);

    return ret;

}

/**************** Self-tests ****************/

#if defined(MBEDTLS_SELF_TEST)

static const unsigned char test_data[2][4] =

{

    "",

    "abc",

};

static const size_t test_data_len[2] =

{

    0, /* "" */

    3  /* "abc" */

};

static const unsigned char test_hash_sha3_224[2][28] =

{

    { /* "" */

        0x6B, 0x4E, 0x03, 0x42, 0x36, 0x67, 0xDB, 0xB7,

        0x3B, 0x6E, 0x15, 0x45, 0x4F, 0x0E, 0xB1, 0xAB,

        0xD4, 0x59, 0x7F, 0x9A, 0x1B, 0x07, 0x8E, 0x3F,

        0x5B, 0x5A, 0x6B, 0xC7

    },

    { /* "abc" */

        0xE6, 0x42, 0x82, 0x4C, 0x3F, 0x8C, 0xF2, 0x4A,

        0xD0, 0x92, 0x34, 0xEE, 0x7D, 0x3C, 0x76, 0x6F,

        0xC9, 0xA3, 0xA5, 0x16, 0x8D, 0x0C, 0x94, 0xAD,

        0x73, 0xB4, 0x6F, 0xDF

    }

};

static const unsigned char test_hash_sha3_256[2][32] =

{

    { /* "" */

        0xA7, 0xFF, 0xC6, 0xF8, 0xBF, 0x1E, 0xD7, 0x66,

        0x51, 0xC1, 0x47, 0x56, 0xA0, 0x61, 0xD6, 0x62,

        0xF5, 0x80, 0xFF, 0x4D, 0xE4, 0x3B, 0x49, 0xFA,

        0x82, 0xD8, 0x0A, 0x4B, 0x80, 0xF8, 0x43, 0x4A

    },

    { /* "abc" */

        0x3A, 0x98, 0x5D, 0xA7, 0x4F, 0xE2, 0x25, 0xB2,

        0x04, 0x5C, 0x17, 0x2D, 0x6B, 0xD3, 0x90, 0xBD,

        0x85, 0x5F, 0x08, 0x6E, 0x3E, 0x9D, 0x52, 0x5B,

        0x46, 0xBF, 0xE2, 0x45, 0x11, 0x43, 0x15, 0x32

    }

};

static const unsigned char test_hash_sha3_384[2][48] =

{

    { /* "" */

        0x0C, 0x63, 0xA7, 0x5B, 0x84, 0x5E, 0x4F, 0x7D,

        0x01, 0x10, 0x7D, 0x85, 0x2E, 0x4C, 0x24, 0x85,

        0xC5, 0x1A, 0x50, 0xAA, 0xAA, 0x94, 0xFC, 0x61,

        0x99, 0x5E, 0x71, 0xBB, 0xEE, 0x98, 0x3A, 0x2A,

        0xC3, 0x71, 0x38, 0x31, 0x26, 0x4A, 0xDB, 0x47,

        0xFB, 0x6B, 0xD1, 0xE0, 0x58, 0xD5, 0xF0, 0x04

    },

    { /* "abc" */

        0xEC, 0x01, 0x49, 0x82, 0x88, 0x51, 0x6F, 0xC9,

        0x26, 0x45, 0x9F, 0x58, 0xE2, 0xC6, 0xAD, 0x8D,

        0xF9, 0xB4, 0x73, 0xCB, 0x0F, 0xC0, 0x8C, 0x25,

        0x96, 0xDA, 0x7C, 0xF0, 0xE4, 0x9B, 0xE4, 0xB2,

        0x98, 0xD8, 0x8C, 0xEA, 0x92, 0x7A, 0xC7, 0xF5,

        0x39, 0xF1, 0xED, 0xF2, 0x28, 0x37, 0x6D, 0x25

    }

};

static const unsigned char test_hash_sha3_512[2][64] =

{

    { /* "" */

        0xA6, 0x9F, 0x73, 0xCC, 0xA2, 0x3A, 0x9A, 0xC5,

        0xC8, 0xB5, 0x67, 0xDC, 0x18, 0x5A, 0x75, 0x6E,

        0x97, 0xC9, 0x82, 0x16, 0x4F, 0xE2, 0x58, 0x59,

        0xE0, 0xD1, 0xDC, 0xC1, 0x47, 0x5C, 0x80, 0xA6,

        0x15, 0xB2, 0x12, 0x3A, 0xF1, 0xF5, 0xF9, 0x4C,

        0x11, 0xE3, 0xE9, 0x40, 0x2C, 0x3A, 0xC5, 0x58,

        0xF5, 0x00, 0x19, 0x9D, 0x95, 0xB6, 0xD3, 0xE3,

        0x01, 0x75, 0x85, 0x86, 0x28, 0x1D, 0xCD, 0x26

    },

    { /* "abc" */

        0xB7, 0x51, 0x85, 0x0B, 0x1A, 0x57, 0x16, 0x8A,

        0x56, 0x93, 0xCD, 0x92, 0x4B, 0x6B, 0x09, 0x6E,

        0x08, 0xF6, 0x21, 0x82, 0x74, 0x44, 0xF7, 0x0D,

        0x88, 0x4F, 0x5D, 0x02, 0x40, 0xD2, 0x71, 0x2E,

        0x10, 0xE1, 0x16, 0xE9, 0x19, 0x2A, 0xF3, 0xC9,

        0x1A, 0x7E, 0xC5, 0x76, 0x47, 0xE3, 0x93, 0x40,

        0x57, 0x34, 0x0B, 0x4C, 0xF4, 0x08, 0xD5, 0xA5,

        0x65, 0x92, 0xF8, 0x27, 0x4E, 0xEC, 0x53, 0xF0

    }

};

static const unsigned char long_kat_hash_sha3_224[28] =

{

    0xD6, 0x93, 0x35, 0xB9, 0x33, 0x25, 0x19, 0x2E,

    0x51, 0x6A, 0x91, 0x2E, 0x6D, 0x19, 0xA1, 0x5C,

    0xB5, 0x1C, 0x6E, 0xD5, 0xC1, 0x52, 0x43, 0xE7,

    0xA7, 0xFD, 0x65, 0x3C

};

static const unsigned char long_kat_hash_sha3_256[32] =

{

    0x5C, 0x88, 0x75, 0xAE, 0x47, 0x4A, 0x36, 0x34,

    0xBA, 0x4F, 0xD5, 0x5E, 0xC8, 0x5B, 0xFF, 0xD6,

    0x61, 0xF3, 0x2A, 0xCA, 0x75, 0xC6, 0xD6, 0x99,

    0xD0, 0xCD, 0xCB, 0x6C, 0x11, 0x58, 0x91, 0xC1

};

static const unsigned char long_kat_hash_sha3_384[48] =

{

    0xEE, 0xE9, 0xE2, 0x4D, 0x78, 0xC1, 0x85, 0x53,

    0x37, 0x98, 0x34, 0x51, 0xDF, 0x97, 0xC8, 0xAD,

    0x9E, 0xED, 0xF2, 0x56, 0xC6, 0x33, 0x4F, 0x8E,

    0x94, 0x8D, 0x25, 0x2D, 0x5E, 0x0E, 0x76, 0x84,

    0x7A, 0xA0, 0x77, 0x4D, 0xDB, 0x90, 0xA8, 0x42,

    0x19, 0x0D, 0x2C, 0x55, 0x8B, 0x4B, 0x83, 0x40

};

static const unsigned char long_kat_hash_sha3_512[64] =

{

    0x3C, 0x3A, 0x87, 0x6D, 0xA1, 0x40, 0x34, 0xAB,

    0x60, 0x62, 0x7C, 0x07, 0x7B, 0xB9, 0x8F, 0x7E,

    0x12, 0x0A, 0x2A, 0x53, 0x70, 0x21, 0x2D, 0xFF,

    0xB3, 0x38, 0x5A, 0x18, 0xD4, 0xF3, 0x88, 0x59,

    0xED, 0x31, 0x1D, 0x0A, 0x9D, 0x51, 0x41, 0xCE,

    0x9C, 0xC5, 0xC6, 0x6E, 0xE6, 0x89, 0xB2, 0x66,

    0xA8, 0xAA, 0x18, 0xAC, 0xE8, 0x28, 0x2A, 0x0E,

    0x0D, 0xB5, 0x96, 0xC9, 0x0B, 0x0A, 0x7B, 0x87

};

static int mbedtls_sha3_kat_test(int verbose,

                                 const char *type_name,

                                 mbedtls_sha3_id id,

                                 int test_num)

{

    uint8_t hash[64];

    int result;

    result = mbedtls_sha3(id,

                          test_data[test_num], test_data_len[test_num],

                          hash, sizeof(hash));

    if (result != 0) {

        if (verbose != 0) {

            mbedtls_printf("  %s test %d error code: %d\n",

                           type_name, test_num, result);

        }

        return result;

    }

    switch (id) {

        case MBEDTLS_SHA3_224:

            result = memcmp(hash, test_hash_sha3_224[test_num], 28);

            break;

        case MBEDTLS_SHA3_256:

            result = memcmp(hash, test_hash_sha3_256[test_num], 32);

            break;

        case MBEDTLS_SHA3_384:

            result = memcmp(hash, test_hash_sha3_384[test_num], 48);

            break;

        case MBEDTLS_SHA3_512:

            result = memcmp(hash, test_hash_sha3_512[test_num], 64);

            break;

        default:

            break;

    }

    if (0 != result) {

        if (verbose != 0) {

            mbedtls_printf("  %s test %d failed\n", type_name, test_num);

        }

        return -1;

    }

    if (verbose != 0) {

        mbedtls_printf("  %s test %d passed\n", type_name, test_num);

    }

    return 0;

}

static int mbedtls_sha3_long_kat_test(int verbose,

                                      const char *type_name,

                                      mbedtls_sha3_id id)

{

    mbedtls_sha3_context ctx;

    unsigned char buffer[1000];

    unsigned char hash[64];

    int result = 0;

    memset(buffer, 'a', 1000);

    if (verbose != 0) {

        mbedtls_printf("  %s long KAT test ", type_name);

    }

    mbedtls_sha3_init(&ctx);

    result = mbedtls_sha3_starts(&ctx, id);

    if (result != 0) {

        if (verbose != 0) {

            mbedtls_printf("setup failed\n ");

        }

    }

    /* Process 1,000,000 (one million) 'a' characters */

    for (int i = 0; i < 1000; i++) {

        result = mbedtls_sha3_update(&ctx, buffer, 1000);

        if (result != 0) {

            if (verbose != 0) {

                mbedtls_printf("update error code: %i\n", result);

            }

            goto cleanup;

        }

    }

    result = mbedtls_sha3_finish(&ctx, hash, sizeof(hash));

    if (result != 0) {

        if (verbose != 0) {

            mbedtls_printf("finish error code: %d\n", result);

        }

        goto cleanup;

    }

    switch (id) {

        case MBEDTLS_SHA3_224:

            result = memcmp(hash, long_kat_hash_sha3_224, 28);

            break;

        case MBEDTLS_SHA3_256:

            result = memcmp(hash, long_kat_hash_sha3_256, 32);

            break;

        case MBEDTLS_SHA3_384:

            result = memcmp(hash, long_kat_hash_sha3_384, 48);

            break;

        case MBEDTLS_SHA3_512:

            result = memcmp(hash, long_kat_hash_sha3_512, 64);

            break;

        default:

            break;

    }

    if (result != 0) {

        if (verbose != 0) {

            mbedtls_printf("failed\n");

        }

    }

    if (verbose != 0) {

        mbedtls_printf("passed\n");

    }

cleanup:

    mbedtls_sha3_free(&ctx);

    return result;

}

int mbedtls_sha3_self_test(int verbose)

{

    int i;

    /* SHA-3 Known Answer Tests (KAT) */

    for (i = 0; i < 2; i++) {

        if (0 != mbedtls_sha3_kat_test(verbose,

                                       "SHA3-224", MBEDTLS_SHA3_224, i)) {

            return 1;

        }

        if (0 != mbedtls_sha3_kat_test(verbose,

                                       "SHA3-256", MBEDTLS_SHA3_256, i)) {

            return 1;

        }

        if (0 != mbedtls_sha3_kat_test(verbose,

                                       "SHA3-384", MBEDTLS_SHA3_384, i)) {

            return 1;

        }

        if (0 != mbedtls_sha3_kat_test(verbose,

                                       "SHA3-512", MBEDTLS_SHA3_512, i)) {

            return 1;

        }

    }

    /* SHA-3 long KAT tests */

    if (0 != mbedtls_sha3_long_kat_test(verbose,

                                        "SHA3-224", MBEDTLS_SHA3_224)) {

        return 1;

    }

    if (0 != mbedtls_sha3_long_kat_test(verbose,

                                        "SHA3-256", MBEDTLS_SHA3_256)) {

        return 1;

    }

    if (0 != mbedtls_sha3_long_kat_test(verbose,

                                        "SHA3-384", MBEDTLS_SHA3_384)) {

        return 1;

    }

    if (0 != mbedtls_sha3_long_kat_test(verbose,

                                        "SHA3-512", MBEDTLS_SHA3_512)) {

        return 1;

    }

    if (verbose != 0) {

        mbedtls_printf("\n");

    }

    return 0;

}

#endif /* MBEDTLS_SELF_TEST */

#endif /* MBEDTLS_SHA3_C */