C++ (Cpp) sodium_mprotect_readwrite Exemples

Exemple #1

Fichier : sodium_utils3.c Projet : luminize/libsodium

int main(void)
{
    void *buf;
    size_t size;

#ifdef SIGSEGV
    signal(SIGSEGV, segv_handler);
#endif
#ifdef SIGBUS
    signal(SIGBUS, segv_handler);
#endif
#ifdef SIGABRT
    signal(SIGABRT, segv_handler);
#endif
    size = 1U + randombytes_uniform(100000U);
    buf = sodium_malloc(size);
    assert(buf != NULL);
    sodium_mprotect_noaccess(buf);
    sodium_mprotect_readwrite(buf);
#ifndef __EMSCRIPTEN__
    sodium_memzero(((unsigned char *)buf) - 8, 8U);
    sodium_mprotect_readonly(buf);
    sodium_free(buf);
    printf("Underflow not caught\n");
#endif
    return 0;
}

Exemple #2

Fichier : sodium_utils2.c Projet : NegativeMjark/pynacl

int main(void)
{
    void *buf;
    size_t size;
    unsigned int i;

    if (sodium_malloc(SIZE_MAX - 1U) != NULL) {
        return 1;
    }
    if (sodium_allocarray(SIZE_MAX / 2U + 1U, SIZE_MAX / 2U) != NULL) {
        return 1;
    }
    sodium_free(sodium_allocarray(0U, 0U));
    sodium_free(sodium_allocarray(0U, 1U));
    sodium_free(sodium_allocarray(1U, 0U));

    buf = sodium_allocarray(1000U, 50U);
    memset(buf, 0, 50000U);
    sodium_free(buf);

    sodium_free(sodium_malloc(0U));
    sodium_free(NULL);
    for (i = 0U; i < 10000U; i++) {
        size = randombytes_uniform(100000U);
        buf = sodium_malloc(size);
        assert(buf != NULL);
        memset(buf, i, size);
        sodium_mprotect_noaccess(buf);
        sodium_free(buf);
    }
    printf("OK\n");

#ifdef SIGSEGV
    signal(SIGSEGV, segv_handler);
#endif
#ifdef SIGBUS
    signal(SIGBUS, segv_handler);
#endif
#ifdef SIGABRT
    signal(SIGABRT, segv_handler);
#endif
    size = randombytes_uniform(100000U);
    buf = sodium_malloc(size);
    assert(buf != NULL);
    sodium_mprotect_readonly(buf);
    sodium_mprotect_readwrite(buf);
#ifndef __EMSCRIPTEN__
    sodium_memzero(((unsigned char *)buf) + size, 1U);
    sodium_mprotect_noaccess(buf);
    sodium_free(buf);
    printf("Overflow not caught\n");
#endif
    return 0;
}