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Copy pathfunctions.c
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450 lines (371 loc) · 11.8 KB
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/* See https://www.python-ldap.org/ for details. */
#include "pythonldap.h"
/* ldap_initialize */
static PyObject *
l_ldap_initialize(PyObject *unused, PyObject *args)
{
char *uri;
LDAP *ld = NULL;
int ret;
PyThreadState *save;
if (!PyArg_ParseTuple(args, "z:initialize", &uri))
return NULL;
save = PyEval_SaveThread();
ret = ldap_initialize(&ld, uri);
PyEval_RestoreThread(save);
if (ret != LDAP_SUCCESS)
return LDAPerror(ld);
return (PyObject *)newLDAPObject(ld);
}
#ifdef HAVE_LDAP_INIT_FD
/* initialize_fd(fileno, url) */
static PyObject *
l_ldap_initialize_fd(PyObject *unused, PyObject *args)
{
char *url;
LDAP *ld = NULL;
int ret;
int fd;
int proto = -1;
LDAPURLDesc *lud = NULL;
PyThreadState *save;
if (!PyArg_ParseTuple(args, "is:initialize_fd", &fd, &url))
return NULL;
/* Get LDAP protocol from scheme */
ret = ldap_url_parse(url, &lud);
if (ret != LDAP_SUCCESS)
return LDAPerr(ret);
if (strcmp(lud->lud_scheme, "ldap") == 0) {
proto = LDAP_PROTO_TCP;
}
else if (strcmp(lud->lud_scheme, "ldaps") == 0) {
proto = LDAP_PROTO_TCP;
}
else if (strcmp(lud->lud_scheme, "ldapi") == 0) {
proto = LDAP_PROTO_IPC;
}
#ifdef LDAP_CONNECTIONLESS
else if (strcmp(lud->lud_scheme, "cldap") == 0) {
proto = LDAP_PROTO_UDP;
}
#endif
else {
ldap_free_urldesc(lud);
PyErr_SetString(PyExc_ValueError, "unsupported URL scheme");
return NULL;
}
ldap_free_urldesc(lud);
save = PyEval_SaveThread();
ret = ldap_init_fd((ber_socket_t) fd, proto, url, &ld);
PyEval_RestoreThread(save);
if (ret != LDAP_SUCCESS)
return LDAPerror(ld);
return (PyObject *)newLDAPObject(ld);
}
#endif
/* ldap_str2dn */
static PyObject *
l_ldap_str2dn(PyObject *unused, PyObject *args)
{
struct berval str;
LDAPDN dn;
int flags = 0;
PyObject *result = NULL, *tmp;
int res, i, j;
Py_ssize_t str_len;
/*
* From a DN string such as "a=b,c=d;e=f", build
* a list-equivalent of AVA structures; namely:
* ((('a','b',1),('c','d',1)),(('e','f',1),))
* The integers are a bit combination of the AVA_* flags
*/
if (!PyArg_ParseTuple(args, "s#|i:str2dn", &str.bv_val, &str_len, &flags))
return NULL;
str.bv_len = (ber_len_t) str_len;
res = ldap_bv2dn(&str, &dn, flags);
if (res != LDAP_SUCCESS)
return LDAPerr(res);
tmp = PyList_New(0);
if (!tmp)
goto failed;
for (i = 0; dn && dn[i]; i++) {
LDAPRDN rdn;
PyObject *rdnlist;
rdn = dn[i];
rdnlist = PyList_New(0);
if (!rdnlist)
goto failed;
if (PyList_Append(tmp, rdnlist) == -1) {
Py_DECREF(rdnlist);
goto failed;
}
for (j = 0; rdn[j]; j++) {
LDAPAVA *ava = rdn[j];
PyObject *tuple;
tuple = Py_BuildValue("(O&O&i)",
LDAPberval_to_unicode_object, &ava->la_attr,
LDAPberval_to_unicode_object, &ava->la_value,
ava->la_flags & ~(LDAP_AVA_FREE_ATTR |
LDAP_AVA_FREE_VALUE));
if (!tuple) {
Py_DECREF(rdnlist);
goto failed;
}
if (PyList_Append(rdnlist, tuple) == -1) {
Py_DECREF(tuple);
Py_DECREF(rdnlist);
goto failed;
}
Py_DECREF(tuple);
}
Py_DECREF(rdnlist);
}
result = tmp;
tmp = NULL;
failed:
Py_XDECREF(tmp);
ldap_dnfree(dn);
return result;
}
/* ldap_dn2str */
static void
_free_dn_structure(LDAPDN dn)
{
if (dn == NULL)
return;
for (LDAPRDN *rdn = dn; *rdn != NULL; rdn++) {
for (LDAPAVA **avap = *rdn; *avap != NULL; avap++) {
LDAPAVA *ava = *avap;
if (ava->la_attr.bv_val) {
free(ava->la_attr.bv_val);
}
if (ava->la_value.bv_val) {
free(ava->la_value.bv_val);
}
free(ava);
}
free(*rdn);
}
free(dn);
}
/*
* Convert a Python list-of-list-of-(str, str, int) into an LDAPDN and
* call ldap_dn2bv to build a DN string.
*
* Python signature: dn2str(dn: list[list[tuple[str, str, int]]], flags: int) -> str
* Returns the DN string on success, or raises TypeError or RuntimeError on error.
*/
static PyObject *
l_ldap_dn2str(PyObject *self, PyObject *args)
{
PyObject *dn_list = NULL;
int flags = 0;
LDAPDN dn = NULL;
LDAPAVA *ava;
LDAPAVA **rdn;
BerValue str = { 0, NULL };
PyObject *py_rdn_seq = NULL, *py_ava_item = NULL;
PyObject *py_name = NULL, *py_value = NULL, *py_encoding = NULL;
PyObject *result = NULL;
Py_ssize_t nrdns = 0, navas = 0, name_len = 0, value_len = 0;
int i = 0, j = 0;
int ldap_err;
const char *name_utf8, *value_utf8;
const char *type_error_message = "expected list[list[tuple[str, str, int]]]";
if (!PyArg_ParseTuple(args, "Oi:dn2str", &dn_list, &flags)) {
return NULL;
}
if (!PySequence_Check(dn_list)) {
PyErr_SetString(PyExc_TypeError, type_error_message);
return NULL;
}
nrdns = PySequence_Size(dn_list);
if (nrdns < 0) {
PyErr_SetString(PyExc_TypeError, type_error_message);
return NULL;
}
/* Allocate array of LDAPRDN pointers (+1 for NULL terminator) */
dn = (LDAPRDN *) calloc((size_t)nrdns + 1, sizeof(LDAPRDN));
if (dn == NULL) {
PyErr_NoMemory();
return NULL;
}
for (i = 0; i < nrdns; i++) {
py_rdn_seq = PySequence_GetItem(dn_list, i); /* New reference */
if (py_rdn_seq == NULL) {
goto error_cleanup;
}
if (!PySequence_Check(py_rdn_seq)) {
PyErr_SetString(PyExc_TypeError, type_error_message);
goto error_cleanup;
}
navas = PySequence_Size(py_rdn_seq);
if (navas < 0) {
PyErr_SetString(PyExc_TypeError, type_error_message);
goto error_cleanup;
}
/* Allocate array of LDAPAVA* pointers (+1 for NULL terminator) */
rdn = (LDAPAVA **)calloc((size_t)navas + 1, sizeof(LDAPAVA *));
if (rdn == NULL) {
PyErr_NoMemory();
goto error_cleanup;
}
for (j = 0; j < navas; j++) {
py_ava_item = PySequence_GetItem(py_rdn_seq, j); /* New reference */
if (py_ava_item == NULL) {
goto error_cleanup;
}
/* Expect a 3‐tuple: (name: str, value: str, encoding: int) */
if (!PyTuple_Check(py_ava_item) || PyTuple_Size(py_ava_item) != 3) {
PyErr_SetString(PyExc_TypeError, type_error_message);
goto error_cleanup;
}
py_name = PyTuple_GetItem(py_ava_item, 0); /* Borrowed reference */
py_value = PyTuple_GetItem(py_ava_item, 1); /* Borrowed reference */
py_encoding = PyTuple_GetItem(py_ava_item, 2); /* Borrowed reference */
if (!PyUnicode_Check(py_name) || !PyUnicode_Check(py_value) || !PyLong_Check(py_encoding)) {
PyErr_SetString(PyExc_TypeError, type_error_message);
goto error_cleanup;
}
name_len = 0;
value_len = 0;
name_utf8 = PyUnicode_AsUTF8AndSize(py_name, &name_len);
value_utf8 = PyUnicode_AsUTF8AndSize(py_value, &value_len);
if (name_utf8 == NULL || value_utf8 == NULL) {
goto error_cleanup;
}
ava = (LDAPAVA *) calloc(1, sizeof(LDAPAVA));
if (ava == NULL) {
PyErr_NoMemory();
goto error_cleanup;
}
ava->la_attr.bv_val = (char *)malloc((size_t)name_len + 1);
if (ava->la_attr.bv_val == NULL) {
free(ava);
PyErr_NoMemory();
goto error_cleanup;
}
memcpy(ava->la_attr.bv_val, name_utf8, (size_t)name_len);
ava->la_attr.bv_val[name_len] = '\0';
ava->la_attr.bv_len = (ber_len_t) name_len;
ava->la_value.bv_val = (char *)malloc((size_t)value_len + 1);
if (ava->la_value.bv_val == NULL) {
free(ava->la_attr.bv_val);
free(ava);
PyErr_NoMemory();
goto error_cleanup;
}
memcpy(ava->la_value.bv_val, value_utf8, (size_t)value_len);
ava->la_value.bv_val[value_len] = '\0';
ava->la_value.bv_len = (ber_len_t) value_len;
ava->la_flags = (int)PyLong_AsLong(py_encoding);
if (PyErr_Occurred()) {
/* Encoding conversion failed */
free(ava->la_attr.bv_val);
free(ava->la_value.bv_val);
free(ava);
goto error_cleanup;
}
rdn[j] = ava;
Py_DECREF(py_ava_item);
py_ava_item = NULL;
}
/* Null‐terminate the RDN */
rdn[navas] = NULL;
dn[i] = rdn;
Py_DECREF(py_rdn_seq);
py_rdn_seq = NULL;
}
/* Null‐terminate the DN */
dn[nrdns] = NULL;
/* Call ldap_dn2bv to build a DN string */
ldap_err = ldap_dn2bv(dn, &str, flags);
if (ldap_err != LDAP_SUCCESS) {
PyErr_SetString(PyExc_RuntimeError, ldap_err2string(ldap_err));
goto error_cleanup;
}
result = PyUnicode_FromString(str.bv_val);
if (result == NULL) {
goto error_cleanup;
}
/* Free the memory allocated by ldap_dn2bv */
ldap_memfree(str.bv_val);
str.bv_val = NULL;
/* Free our local DN structure */
_free_dn_structure(dn);
dn = NULL;
return result;
error_cleanup:
/* Free any partially built DN structure */
_free_dn_structure(dn);
dn = NULL;
/* If ldap_dn2bv allocated something, free it */
if (str.bv_val) {
ldap_memfree(str.bv_val);
str.bv_val = NULL;
}
/* Cleanup Python temporaries */
Py_XDECREF(py_ava_item);
Py_XDECREF(py_rdn_seq);
return NULL;
}
/* ldap_set_option (global options) */
static PyObject *
l_ldap_set_option(PyObject *self, PyObject *args)
{
PyObject *value;
int option;
if (!PyArg_ParseTuple(args, "iO:set_option", &option, &value))
return NULL;
if (!LDAP_set_option(NULL, option, value))
return NULL;
Py_INCREF(Py_None);
return Py_None;
}
/* ldap_get_option (global options) */
static PyObject *
l_ldap_get_option(PyObject *self, PyObject *args)
{
int option;
if (!PyArg_ParseTuple(args, "i:get_option", &option))
return NULL;
return LDAP_get_option(NULL, option);
}
/* ldap_is_filter */
static PyObject *l_ldap_is_filter(PyObject *self, PyObject *args)
{
const char *filter;
BerElement *ber;
int rc;
if(!PyArg_ParseTuple(args, "s:is_filter", &filter))
return NULL;
ber = ber_alloc_t(LBER_USE_DER);
if(ber == NULL) {
return PyErr_NoMemory();
}
rc = ldap_pvt_put_filter(ber, filter);
ber_free(ber, 1);
if (rc == 0) {
Py_RETURN_TRUE;
}
Py_RETURN_FALSE;
}
/* methods */
static PyMethodDef methods[] = {
{"initialize", (PyCFunction)l_ldap_initialize, METH_VARARGS},
#ifdef HAVE_LDAP_INIT_FD
{"initialize_fd", (PyCFunction)l_ldap_initialize_fd, METH_VARARGS},
#endif
{"str2dn", (PyCFunction)l_ldap_str2dn, METH_VARARGS},
{"dn2str", (PyCFunction)l_ldap_dn2str, METH_VARARGS},
{"set_option", (PyCFunction)l_ldap_set_option, METH_VARARGS},
{"get_option", (PyCFunction)l_ldap_get_option, METH_VARARGS},
{"is_filter", (PyCFunction)l_ldap_is_filter, METH_VARARGS},
{NULL, NULL}
};
/* initialisation */
void
LDAPinit_functions(PyObject *d)
{
LDAPadd_methods(d, methods);
}