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#include "Python.h"
#define _WIN32_WINNT 0x0400 /* Needed for CryptoAPI on some systems */
#include <windows.h>
static PyObject* getRandomBytes(PyObject *self, PyObject *args)
{
int howMany;
HCRYPTPROV hCryptProv;
unsigned char* bytes = NULL;
PyObject* returnVal = NULL;
/* Read Arguments */
if (!PyArg_ParseTuple(args, "i", &howMany))
return(NULL);
/* Get Context */
if(CryptAcquireContext(
&hCryptProv,
NULL,
NULL,
PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT) == 0)
return Py_BuildValue("s#", NULL, 0);
/* Allocate bytes */
bytes = malloc(howMany);
/* Get random data */
if(CryptGenRandom(
hCryptProv,
howMany,
bytes) == 0)
returnVal = Py_BuildValue("s#", NULL, 0);
else
returnVal = Py_BuildValue("s#", bytes, howMany);
free(bytes);
CryptReleaseContext(hCryptProv, 0);
return returnVal;
}
/* List of functions exported by this module */
static struct PyMethodDef win32prng_functions[] = {
{"getRandomBytes", (PyCFunction)getRandomBytes, METH_VARARGS},
{NULL, NULL} /* Sentinel */
};
/* Initialize this module. */
DL_EXPORT(void) initwin32prng(void)
{
Py_InitModule("win32prng", win32prng_functions);
}
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