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 *
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 *
 * The above copyright notice and this permission notice (including the next
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/**
 * Tests for x_sha1_* functions provided in os/xsha1.c.
 */

/* Test relies on assert() */
#undef NDEBUG

#include <dix-config.h>

#include <assert.h>
#include "os.h"
#include "os/xsha1.h"
#include "tests-common.h"

static void
raw_to_hex(const unsigned char *raw, size_t raw_size,
           unsigned char *hex, size_t hex_size)
{
    static const char *hex_digits = "0123456789abcdef";
    size_t i, o;

    assert(hex_size >= (raw_size * 2) + 1);

    for (i = o = 0; i < raw_size; i++) {
        hex[o++] = hex_digits[raw[i] >> 4];
        hex[o++] = hex_digits[raw[i] & 0x0f];
    }
    hex[o] = '\0';
}

static void
sha1_test_repeated_blocks(void *data, size_t length, unsigned int repeat,
                          const char *expected_hash)
{
    void *ctx;
    unsigned char raw_result[20];
    unsigned char hex_result[41];

    assert((ctx = x_sha1_init()) != NULL);
    for (unsigned int i = 0; i < repeat; i++) {
        assert(x_sha1_update(ctx, data, length) == 1);
    }
    assert(x_sha1_final(ctx, raw_result) == 1);
    raw_to_hex(raw_result, sizeof(raw_result), hex_result, sizeof(hex_result));
    assert(strcmp((char *)hex_result, expected_hash) == 0);
}

static void
sha1_test_string(const char *string, const char *expected_hash)
{
    sha1_test_repeated_blocks((void *) string, strlen(string), 1, expected_hash);
}

static void
sha1_checks(void)
{
    char test_data[4096];

    /* some test data of our own */
    sha1_test_string("This is a test.  This is only a test.\n",
                     "7679a5fb1320e69f4550c84560fc6ef10ace4550");

    memset(test_data, 'X', sizeof(test_data));
    sha1_test_repeated_blocks(test_data, sizeof(test_data), 11,
                              "5392c69de307625c9ff5e7d8190332857deac9f9");

    /* Test data from https://di-mgt.com.au/sha_testvectors.html */
    sha1_test_string("abc",
                     "a9993e364706816aba3e25717850c26c9cd0d89d");

    sha1_test_string("",
                     "da39a3ee5e6b4b0d3255bfef95601890afd80709");

    sha1_test_string("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
                     "84983e441c3bd26ebaae4aa1f95129e5e54670f1");

    sha1_test_string("abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
                     "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
                     "a49b2446a02c645bf419f995b67091253a04a259");

    memset(test_data, 'a', 4000);
    sha1_test_repeated_blocks(test_data, 4000, 250, /* 4000 * 250 = 1 million */
                              "34aa973cd4c4daa4f61eeb2bdbad27316534016f");

    const char *long_string = /* 64 bytes long */
        "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmno";
    const size_t long_length = strlen(long_string);
    assert((sizeof(test_data) % long_length) == 0);
    for (size_t i = 0; i < (sizeof(test_data) / long_length) ; i++) {
        memcpy(test_data + (i * long_length), long_string, long_length);
    }
    sha1_test_repeated_blocks(test_data, sizeof(test_data),
                              16777216 / (sizeof(test_data) / long_length),
                              "7789f0c9ef7bfc40d93311143dfbe69e2017f592");
}

const testfunc_t*
sha1_test(void)
{
    static const testfunc_t testfuncs[] = {
        sha1_checks,
        NULL,
    };

    return testfuncs;
}