/*  test_sha256.c - TinyCrypt implementation of some SHA-256 tests */

/*
    Copyright (C) 2017 by Intel Corporation, All Rights Reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

      - Redistributions of source code must retain the above copyright notice,
       this list of conditions and the following disclaimer.

      - Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

      - Neither the name of Intel Corporation nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.
*/

/*
    DESCRIPTION
    This module tests the following SHA256 routines:

    Scenarios tested include:
    - NIST SHA256 test vectors
*/

#include <tinycrypt/sha256.h>
#include <tinycrypt/constants.h>
#include <test_utils.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>

/*
    NIST SHA256 test vector 1.
*/
unsigned int test_1(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #1:\n");
    const uint8_t expected[32] =
    {
        0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea, 0x41, 0x41, 0x40, 0xde,
        0x5d, 0xae, 0x22, 0x23, 0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c,
        0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad
    };
    const char* m = "abc";
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, (const uint8_t*) m, strlen(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(1, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

/*
    NIST SHA256 test vector 2.
*/
unsigned int test_2(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #2:\n");
    const uint8_t expected[32] =
    {
        0x24, 0x8d, 0x6a, 0x61, 0xd2, 0x06, 0x38, 0xb8, 0xe5, 0xc0, 0x26, 0x93,
        0x0c, 0x3e, 0x60, 0x39, 0xa3, 0x3c, 0xe4, 0x59, 0x64, 0xff, 0x21, 0x67,
        0xf6, 0xec, 0xed, 0xd4, 0x19, 0xdb, 0x06, 0xc1
    };
    const char* m = "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq";
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, (const uint8_t*) m, strlen(m));
    (void) tc_sha256_final(digest, &s);
    result = check_result(2, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_3(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #3:\n");
    const uint8_t expected[32] =
    {
        0x68, 0x32, 0x57, 0x20, 0xaa, 0xbd, 0x7c, 0x82, 0xf3, 0x0f, 0x55, 0x4b,
        0x31, 0x3d, 0x05, 0x70, 0xc9, 0x5a, 0xcc, 0xbb, 0x7d, 0xc4, 0xb5, 0xaa,
        0xe1, 0x12, 0x04, 0xc0, 0x8f, 0xfe, 0x73, 0x2b
    };
    const uint8_t m[1] = { 0xbd };
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(3, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_4(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #4:\n");
    const uint8_t expected[32] =
    {
        0x7a, 0xbc, 0x22, 0xc0, 0xae, 0x5a, 0xf2, 0x6c, 0xe9, 0x3d, 0xbb, 0x94,
        0x43, 0x3a, 0x0e, 0x0b, 0x2e, 0x11, 0x9d, 0x01, 0x4f, 0x8e, 0x7f, 0x65,
        0xbd, 0x56, 0xc6, 0x1c, 0xcc, 0xcd, 0x95, 0x04
    };
    const uint8_t m[4] = { 0xc9, 0x8c, 0x8e, 0x55 };
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(4, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_5(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #5:\n");
    const uint8_t expected[32] =
    {
        0x02, 0x77, 0x94, 0x66, 0xcd, 0xec, 0x16, 0x38, 0x11, 0xd0, 0x78, 0x81,
        0x5c, 0x63, 0x3f, 0x21, 0x90, 0x14, 0x13, 0x08, 0x14, 0x49, 0x00, 0x2f,
        0x24, 0xaa, 0x3e, 0x80, 0xf0, 0xb8, 0x8e, 0xf7
    };
    uint8_t m[55];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)memset(m, 0x00, sizeof(m));
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(5, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_6(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #6:\n");
    const uint8_t expected[32] =
    {
        0xd4, 0x81, 0x7a, 0xa5, 0x49, 0x76, 0x28, 0xe7, 0xc7, 0x7e, 0x6b, 0x60,
        0x61, 0x07, 0x04, 0x2b, 0xbb, 0xa3, 0x13, 0x08, 0x88, 0xc5, 0xf4, 0x7a,
        0x37, 0x5e, 0x61, 0x79, 0xbe, 0x78, 0x9f, 0xbb
    };
    uint8_t m[56];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)memset(m, 0x00, sizeof(m));
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(6, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_7(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #7:\n");
    const uint8_t expected[32] =
    {
        0x65, 0xa1, 0x6c, 0xb7, 0x86, 0x13, 0x35, 0xd5, 0xac, 0xe3, 0xc6, 0x07,
        0x18, 0xb5, 0x05, 0x2e, 0x44, 0x66, 0x07, 0x26, 0xda, 0x4c, 0xd1, 0x3b,
        0xb7, 0x45, 0x38, 0x1b, 0x23, 0x5a, 0x17, 0x85
    };
    uint8_t m[57];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)memset(m, 0x00, sizeof(m));
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(7, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_8(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #8:\n");
    const uint8_t expected[32] =
    {
        0xf5, 0xa5, 0xfd, 0x42, 0xd1, 0x6a, 0x20, 0x30, 0x27, 0x98, 0xef, 0x6e,
        0xd3, 0x09, 0x97, 0x9b, 0x43, 0x00, 0x3d, 0x23, 0x20, 0xd9, 0xf0, 0xe8,
        0xea, 0x98, 0x31, 0xa9, 0x27, 0x59, 0xfb, 0x4b
    };
    uint8_t m[64];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)memset(m, 0x00, sizeof(m));
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(8, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_9(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #9:\n");
    const uint8_t expected[32] =
    {
        0x54, 0x1b, 0x3e, 0x9d, 0xaa, 0x09, 0xb2, 0x0b, 0xf8, 0x5f, 0xa2, 0x73,
        0xe5, 0xcb, 0xd3, 0xe8, 0x01, 0x85, 0xaa, 0x4e, 0xc2, 0x98, 0xe7, 0x65,
        0xdb, 0x87, 0x74, 0x2b, 0x70, 0x13, 0x8a, 0x53
    };
    uint8_t m[1000];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)memset(m, 0x00, sizeof(m));
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(9, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_10(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #10:\n");
    const uint8_t expected[32] =
    {
        0xc2, 0xe6, 0x86, 0x82, 0x34, 0x89, 0xce, 0xd2, 0x01, 0x7f, 0x60, 0x59,
        0xb8, 0xb2, 0x39, 0x31, 0x8b, 0x63, 0x64, 0xf6, 0xdc, 0xd8, 0x35, 0xd0,
        0xa5, 0x19, 0x10, 0x5a, 0x1e, 0xad, 0xd6, 0xe4
    };
    uint8_t m[1000];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)memset(m, 0x41, sizeof(m));
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(10, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_11(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #11:\n");
    const uint8_t expected[32] =
    {
        0xf4, 0xd6, 0x2d, 0xde, 0xc0, 0xf3, 0xdd, 0x90, 0xea, 0x13, 0x80, 0xfa,
        0x16, 0xa5, 0xff, 0x8d, 0xc4, 0xc5, 0x4b, 0x21, 0x74, 0x06, 0x50, 0xf2,
        0x4a, 0xfc, 0x41, 0x20, 0x90, 0x35, 0x52, 0xb0
    };
    uint8_t m[1005];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    (void)memset(m, 0x55, sizeof(m));
    (void)tc_sha256_init(&s);
    tc_sha256_update(&s, m, sizeof(m));
    (void)tc_sha256_final(digest, &s);
    result = check_result(11, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_12(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #12:\n");
    const uint8_t expected[32] =
    {
        0xd2, 0x97, 0x51, 0xf2, 0x64, 0x9b, 0x32, 0xff, 0x57, 0x2b, 0x5e, 0x0a,
        0x9f, 0x54, 0x1e, 0xa6, 0x60, 0xa5, 0x0f, 0x94, 0xff, 0x0b, 0xee, 0xdf,
        0xb0, 0xb6, 0x92, 0xb9, 0x24, 0xcc, 0x80, 0x25
    };
    uint8_t m[1000];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    unsigned int i;
    (void)memset(m, 0x00, sizeof(m));
    (void)tc_sha256_init(&s);

    for (i = 0; i < 1000; ++i)
    {
        tc_sha256_update(&s, m, sizeof(m));
    }

    (void)tc_sha256_final(digest, &s);
    result = check_result(12, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_13(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #13:\n");
    const uint8_t expected[32] =
    {
        0x15, 0xa1, 0x86, 0x8c, 0x12, 0xcc, 0x53, 0x95, 0x1e, 0x18, 0x23, 0x44,
        0x27, 0x74, 0x47, 0xcd, 0x09, 0x79, 0x53, 0x6b, 0xad, 0xcc, 0x51, 0x2a,
        0xd2, 0x4c, 0x67, 0xe9, 0xb2, 0xd4, 0xf3, 0xdd
    };
    uint8_t m[32768];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    unsigned int i;
    (void)memset(m, 0x5a, sizeof(m));
    (void)tc_sha256_init(&s);

    for (i = 0; i < 16384; ++i)
    {
        tc_sha256_update(&s, m, sizeof(m));
    }

    (void)tc_sha256_final(digest, &s);
    result = check_result(13, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

unsigned int test_14(void)
{
    unsigned int result = TC_PASS;
    TC_PRINT("SHA256 test #14:\n");
    const uint8_t expected[32] =
    {
        0x46, 0x1c, 0x19, 0xa9, 0x3b, 0xd4, 0x34, 0x4f, 0x92, 0x15, 0xf5, 0xec,
        0x64, 0x35, 0x70, 0x90, 0x34, 0x2b, 0xc6, 0x6b, 0x15, 0xa1, 0x48, 0x31,
        0x7d, 0x27, 0x6e, 0x31, 0xcb, 0xc2, 0x0b, 0x53
    };
    uint8_t m[32768];
    uint8_t digest[32];
    struct tc_sha256_state_struct s;
    unsigned int i;
    (void)memset(m, 0x00, sizeof(m));
    (void) tc_sha256_init(&s);

    for (i = 0; i < 33280; ++i)
    {
        tc_sha256_update(&s, m, sizeof(m));
    }

    (void) tc_sha256_final(digest, &s);
    result = check_result(14, expected, sizeof(expected),
                          digest, sizeof(digest));
    TC_END_RESULT(result);
    return result;
}

/*
    Main task to test AES
*/

int main(void)
{
    unsigned int result = TC_PASS;
    TC_START("Performing SHA256 tests (NIST tests vectors):");
    result = test_1();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #1 failed.\n");
        goto exitTest;
    }

    result = test_2();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #2 failed.\n");
        goto exitTest;
    }

    result = test_3();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #3 failed.\n");
        goto exitTest;
    }

    result = test_4();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #4 failed.\n");
        goto exitTest;
    }

    result = test_5();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #5 failed.\n");
        goto exitTest;
    }

    result = test_6();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #6 failed.\n");
        goto exitTest;
    }

    result = test_7();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #7 failed.\n");
        goto exitTest;
    }

    result = test_8();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #8 failed.\n");
        goto exitTest;
    }

    result = test_9();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #9 failed.\n");
        goto exitTest;
    }

    result = test_10();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #10 failed.\n");
        goto exitTest;
    }

    result = test_11();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #11 failed.\n");
        goto exitTest;
    }

    result = test_12();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #12 failed.\n");
        goto exitTest;
    }

    /* memory and computation intensive test cases: */
    result = test_13();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #13 failed.\n");
        goto exitTest;
    }

    result = test_14();

    if (result == TC_FAIL)
    {
        /* terminate test */
        TC_ERROR("SHA256 test #14 failed.\n");
        goto exitTest;
    }

    TC_PRINT("All SHA256 tests succeeded!\n");
exitTest:
    TC_END_RESULT(result);
    TC_END_REPORT(result);
}

