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/*

* Python UUID module that wraps libuuid or Windows rpcrt4.dll.

* DCE compatible Universally Unique Identifier library.

*/

#define PY_SSIZE_T_CLEAN

#include "Python.h"

#ifdef HAVE_UUID_UUID_H

#include <uuid/uuid.h>

#elif defined(HAVE_UUID_H)

#include <uuid.h>

#endif

#ifdef MS_WINDOWS

#include <rpc.h>

#endif

#ifndef MS_WINDOWS

static PyObject *

py_uuid_generate_time_safe(PyObject *Py_UNUSED(context),

PyObject *Py_UNUSED(ignored))

{

uuid_t uuid;

#ifdef HAVE_UUID_GENERATE_TIME_SAFE

int res;

res = uuid_generate_time_safe(uuid);

return Py_BuildValue("y#i", (const char *) uuid, sizeof(uuid), res);

#elif defined(HAVE_UUID_CREATE)

uint32_t status;

uuid_create(&uuid, &status);

# if defined(HAVE_UUID_ENC_BE)

unsigned char buf[sizeof(uuid)];

uuid_enc_be(buf, &uuid);

return Py_BuildValue("y#i", buf, sizeof(uuid), (int) status);

# else

return Py_BuildValue("y#i", (const char *) &uuid, sizeof(uuid), (int) status);

# endif /* HAVE_UUID_CREATE */

#else /* HAVE_UUID_GENERATE_TIME_SAFE */

uuid_generate_time(uuid);

return Py_BuildValue("y#O", (const char *) uuid, sizeof(uuid), Py_None);

#endif /* HAVE_UUID_GENERATE_TIME_SAFE */

}

#else /* MS_WINDOWS */

static PyObject *

py_UuidCreate(PyObject *Py_UNUSED(context),

PyObject *Py_UNUSED(ignored))

{

UUID uuid;

RPC_STATUS res;

Py_BEGIN_ALLOW_THREADS

res = UuidCreateSequential(&uuid);

Py_END_ALLOW_THREADS

switch (res) {

case RPC_S_OK:

case RPC_S_UUID_LOCAL_ONLY:

case RPC_S_UUID_NO_ADDRESS:

/*

All success codes, but the latter two indicate that the UUID is random

rather than based on the MAC address. If the OS can't figure this out,

neither can we, so we'll take it anyway.

*/

return Py_BuildValue("y#", (const char *)&uuid, sizeof(uuid));

}

PyErr_SetFromWindowsErr(res);

return NULL;

}

#endif /* MS_WINDOWS */

static int

uuid_exec(PyObject *module) {

assert(sizeof(uuid_t) == 16);

#if defined(MS_WINDOWS)

int has_uuid_generate_time_safe = 0;

#elif defined(HAVE_UUID_GENERATE_TIME_SAFE)

int has_uuid_generate_time_safe = 1;

#else

int has_uuid_generate_time_safe = 0;

#endif

if (PyModule_AddIntConstant(module, "has_uuid_generate_time_safe",

has_uuid_generate_time_safe) < 0) {

return -1;

}

return 0;

}

static PyMethodDef uuid_methods[] = {

#if defined(HAVE_UUID_UUID_H) || defined(HAVE_UUID_H)

{"generate_time_safe", py_uuid_generate_time_safe, METH_NOARGS, NULL},

#endif

#if defined(MS_WINDOWS)

{"UuidCreate", py_UuidCreate, METH_NOARGS, NULL},

#endif

{NULL, NULL, 0, NULL} /* sentinel */

};

static PyModuleDef_Slot uuid_slots[] = {

{Py_mod_exec, uuid_exec},

{0, NULL}

};

static struct PyModuleDef uuidmodule = {

PyModuleDef_HEAD_INIT,

.m_name = "_uuid",

.m_size = 0,

.m_methods = uuid_methods,

.m_slots = uuid_slots,

};

PyMODINIT_FUNC

PyInit__uuid(void)

{

return PyModuleDef_Init(&uuidmodule);

}