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Copy pathldapcontrol.c
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390 lines (320 loc) · 9.03 KB
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/* See https://www.python-ldap.org/ for details. */
#include "pythonldap.h"
/* Prints to stdout the contents of an array of LDAPControl objects */
/* XXX: This is a debugging tool, and the printf generates some warnings
* about pointer types. I left it here in case something breaks and we
* need to inspect an LDAPControl structure.
static void
LDAPControl_DumpList( LDAPControl** lcs ) {
LDAPControl** lcp;
LDAPControl* lc;
for ( lcp = lcs; *lcp; lcp++ ) {
lc = *lcp;
printf("OID: %s\nCriticality: %d\nBER length: %d\nBER value: %x\n",
lc->ldctl_oid, lc->ldctl_iscritical, lc->ldctl_value.bv_len,
lc->ldctl_value.bv_val);
}
} */
/* Free a single LDAPControl object created by Tuple_to_LDAPControl */
static void
LDAPControl_DEL(LDAPControl *lc)
{
if (lc == NULL)
return;
if (lc->ldctl_oid)
PyMem_DEL(lc->ldctl_oid);
PyMem_DEL(lc);
}
/* Free an array of LDAPControl objects created by LDAPControls_from_object */
void
LDAPControl_List_DEL(LDAPControl **lcs)
{
LDAPControl **lcp;
if (lcs == NULL)
return;
for (lcp = lcs; *lcp; lcp++)
LDAPControl_DEL(*lcp);
PyMem_DEL(lcs);
}
/* Takes a tuple of the form:
* (OID: string, Criticality: int/boolean, Value: string/None)
* and converts it into an LDAPControl structure.
*
* The Value string should represent an ASN.1 encoded structure.
*/
static LDAPControl *
Tuple_to_LDAPControl(PyObject *tup)
{
char *oid;
char iscritical;
struct berval berbytes;
PyObject *bytes;
LDAPControl *lc = NULL;
Py_ssize_t len;
if (!PyTuple_Check(tup)) {
LDAPerror_TypeError("Tuple_to_LDAPControl(): expected a tuple", tup);
return NULL;
}
if (!PyArg_ParseTuple
(tup, "sbO:Tuple_to_LDAPControl", &oid, &iscritical, &bytes))
return NULL;
lc = PyMem_NEW(LDAPControl, 1);
if (lc == NULL) {
PyErr_NoMemory();
return NULL;
}
lc->ldctl_iscritical = iscritical;
len = strlen(oid);
lc->ldctl_oid = PyMem_NEW(char, len + 1);
if (lc->ldctl_oid == NULL) {
PyErr_NoMemory();
LDAPControl_DEL(lc);
return NULL;
}
memcpy(lc->ldctl_oid, oid, len + 1);
/* The berval can either be None or a String */
if (PyNone_Check(bytes)) {
berbytes.bv_len = 0;
berbytes.bv_val = NULL;
}
else if (PyBytes_Check(bytes)) {
berbytes.bv_len = PyBytes_Size(bytes);
berbytes.bv_val = PyBytes_AsString(bytes);
}
else {
LDAPerror_TypeError("Tuple_to_LDAPControl(): expected bytes", bytes);
LDAPControl_DEL(lc);
return NULL;
}
lc->ldctl_value = berbytes;
return lc;
}
/* Convert a list of tuples (of a format acceptable to the Tuple_to_LDAPControl
* function) into an array of LDAPControl objects. */
int
LDAPControls_from_object(PyObject *list, LDAPControl ***controls_ret)
{
Py_ssize_t len, i;
LDAPControl **ldcs;
LDAPControl *ldc;
PyObject *item;
if (!PySequence_Check(list)) {
LDAPerror_TypeError("LDAPControls_from_object(): expected a list",
list);
return 0;
}
len = PySequence_Length(list);
ldcs = PyMem_NEW(LDAPControl *, len + 1);
if (ldcs == NULL) {
PyErr_NoMemory();
return 0;
}
for (i = 0; i < len; i++) {
item = PySequence_GetItem(list, i);
if (item == NULL) {
PyMem_DEL(ldcs);
return 0;
}
ldc = Tuple_to_LDAPControl(item);
if (ldc == NULL) {
Py_DECREF(item);
PyMem_DEL(ldcs);
return 0;
}
ldcs[i] = ldc;
Py_DECREF(item);
}
ldcs[len] = NULL;
*controls_ret = ldcs;
return 1;
}
PyObject *
LDAPControls_to_List(LDAPControl **ldcs)
{
PyObject *res = 0, *pyctrl;
LDAPControl **tmp = ldcs;
Py_ssize_t num_ctrls = 0, i;
if (tmp)
while (*tmp++)
num_ctrls++;
if ((res = PyList_New(num_ctrls)) == NULL) {
return NULL;
}
for (i = 0; i < num_ctrls; i++) {
pyctrl = Py_BuildValue("sbO&",
ldcs[i]->ldctl_oid,
ldcs[i]->ldctl_iscritical,
LDAPberval_to_object, &ldcs[i]->ldctl_value);
if (pyctrl == NULL) {
Py_DECREF(res);
return NULL;
}
PyList_SET_ITEM(res, i, pyctrl);
}
return res;
}
/* --------------- en-/decoders ------------- */
/* Matched Values, aka, Values Return Filter */
static PyObject *
encode_rfc3876(PyObject *self, PyObject *args)
{
PyObject *res = 0;
int err;
BerElement *vrber = 0;
char *vrFilter;
struct berval *ctrl_val;
if (!PyArg_ParseTuple
(args, "s:encode_valuesreturnfilter_control", &vrFilter)) {
goto endlbl;
}
if (!(vrber = ber_alloc_t(LBER_USE_DER))) {
LDAPerr(LDAP_NO_MEMORY);
goto endlbl;
}
err = ldap_put_vrFilter(vrber, vrFilter);
if (err == -1) {
LDAPerr(LDAP_FILTER_ERROR);
goto endlbl;
}
err = ber_flatten(vrber, &ctrl_val);
if (err == -1) {
LDAPerr(LDAP_NO_MEMORY);
goto endlbl;
}
res = LDAPberval_to_object(ctrl_val);
ber_bvfree(ctrl_val);
endlbl:
if (vrber)
ber_free(vrber, 1);
return res;
}
static PyObject *
encode_rfc2696(PyObject *self, PyObject *args)
{
PyObject *res = 0;
BerElement *ber = 0;
struct berval cookie, *ctrl_val;
Py_ssize_t cookie_len;
int size = 0; /* ber_int_t is int */
ber_tag_t tag;
if (!PyArg_ParseTuple(args, "is#:encode_page_control", &size,
&cookie.bv_val, &cookie_len)) {
goto endlbl;
}
cookie.bv_len = (ber_len_t) cookie_len;
if (!(ber = ber_alloc_t(LBER_USE_DER))) {
LDAPerr(LDAP_NO_MEMORY);
goto endlbl;
}
tag = ber_printf(ber, "{i", size);
if (tag == LBER_ERROR) {
LDAPerr(LDAP_ENCODING_ERROR);
goto endlbl;
}
if (!cookie.bv_len)
tag = ber_printf(ber, "o", "", 0);
else
tag = ber_printf(ber, "O", &cookie);
if (tag == LBER_ERROR) {
LDAPerr(LDAP_ENCODING_ERROR);
goto endlbl;
}
tag = ber_printf(ber, /*{ */ "N}");
if (tag == LBER_ERROR) {
LDAPerr(LDAP_ENCODING_ERROR);
goto endlbl;
}
if (-1 == ber_flatten(ber, &ctrl_val)) {
LDAPerr(LDAP_NO_MEMORY);
goto endlbl;
}
res = LDAPberval_to_object(ctrl_val);
ber_bvfree(ctrl_val);
endlbl:
if (ber)
ber_free(ber, 1);
return res;
}
static PyObject *
decode_rfc2696(PyObject *self, PyObject *args)
{
PyObject *res = 0;
BerElement *ber = 0;
struct berval ldctl_value;
ber_tag_t tag;
struct berval *cookiep;
int count = 0; /* ber_int_t is int */
Py_ssize_t ldctl_value_len;
if (!PyArg_ParseTuple(args, "s#:decode_page_control",
&ldctl_value.bv_val, &ldctl_value_len)) {
goto endlbl;
}
ldctl_value.bv_len = (ber_len_t) ldctl_value_len;
if (!(ber = ber_init(&ldctl_value))) {
LDAPerr(LDAP_NO_MEMORY);
goto endlbl;
}
tag = ber_scanf(ber, "{iO", &count, &cookiep);
if (tag == LBER_ERROR) {
LDAPerr(LDAP_DECODING_ERROR);
goto endlbl;
}
res = Py_BuildValue("(iO&)", count, LDAPberval_to_object, cookiep);
ber_bvfree(cookiep);
endlbl:
if (ber)
ber_free(ber, 1);
return res;
}
static PyObject *
encode_assertion_control(PyObject *self, PyObject *args)
{
int err;
PyObject *res = 0;
char *assertion_filterstr;
struct berval ctrl_val;
LDAP *ld = NULL;
PyThreadState *save;
if (!PyArg_ParseTuple(args, "s:encode_assertion_control",
&assertion_filterstr)) {
goto endlbl;
}
/* XXX: ldap_create() is a nasty and slow hack. It's creating a full blown
* LDAP object just to encode assertion controls.
*/
save = PyEval_SaveThread();
err = ldap_create(&ld);
PyEval_RestoreThread(save);
if (err != LDAP_SUCCESS)
return LDAPerror(ld);
err = ldap_create_assertion_control_value(ld, assertion_filterstr,
&ctrl_val);
if (err != LDAP_SUCCESS) {
LDAPerror(ld);
save = PyEval_SaveThread();
ldap_unbind_ext(ld, NULL, NULL);
PyEval_RestoreThread(save);
return NULL;
}
save = PyEval_SaveThread();
ldap_unbind_ext(ld, NULL, NULL);
PyEval_RestoreThread(save);
res = LDAPberval_to_object(&ctrl_val);
if (ctrl_val.bv_val != NULL) {
ber_memfree(ctrl_val.bv_val);
}
endlbl:
return res;
}
static PyMethodDef methods[] = {
{"encode_page_control", encode_rfc2696, METH_VARARGS},
{"decode_page_control", decode_rfc2696, METH_VARARGS},
{"encode_valuesreturnfilter_control", encode_rfc3876, METH_VARARGS},
{"encode_assertion_control", encode_assertion_control, METH_VARARGS},
{NULL, NULL}
};
void
LDAPinit_control(PyObject *d)
{
LDAPadd_methods(d, methods);
}