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dropbear/fuzz/fuzz-common.c  view on Meta::CPAN

        fuzz.do_jmp = 0;
        m_malloc_free_epoch(1, 1);
        TRACE(("dropbear_exit longjmped"))
        /* dropbear_exit jumped here */
    }

    return 0;
}

const void* fuzz_get_algo(const algo_type *algos, const char* name) {
    const algo_type *t;
    for (t = algos; t->name; t++) {
        if (strcmp(t->name, name) == 0) {
            return t->data;
        }
    }
    assert(0);
}

void fuzz_dump(const unsigned char* data, size_t len) {
    if (fuzz.dumping) {
        TRACE(("dump %zu", len))
        assert(atomicio(vwrite, fuzz.recv_dumpfd, (void*)data, len) == len);
    }
}

static struct passwd pwd_root = {
    .pw_name = "root",
    .pw_passwd = "!",
    .pw_uid = 0,
    .pw_gid = 0,
    .pw_dir = "/root",
    .pw_shell = "/bin/sh",
};

static struct passwd pwd_other = {
    .pw_name = "other",
    .pw_passwd = "!",
    .pw_uid = 100,
    .pw_gid = 100,
    .pw_dir = "/home/other",
    .pw_shell = "/bin/sh",
};


/* oss-fuzz runs fuzzers under minijail, without /etc/passwd.
We provide sufficient values for the fuzzers to run */
struct passwd* fuzz_getpwnam(const char *login) {
    if (!fuzz.fuzzing) {
        return getpwnam(login);
    }
    if (strcmp(login, pwd_other.pw_name) == 0) {
        return &pwd_other;
    }
    if (strcmp(login, pwd_root.pw_name) == 0) {
        return &pwd_root;
    }
    return NULL;
}

struct passwd* fuzz_getpwuid(uid_t uid) {
    if (!fuzz.fuzzing) {
        return getpwuid(uid);
    }
    if (uid == pwd_other.pw_uid) {
        return &pwd_other;
    }
    if (uid == pwd_root.pw_uid) {
        return &pwd_root;
    }
    return NULL;
}