/****************************************************************************** * flask.c *  * Authors: George Coker, <gscoker@alpha.ncsc.mil> *          Michael LeMay, <mdlemay@epoch.ncsc.mil> * * *    This program is free software; you can redistribute it and/or modify *    it under the terms of the GNU General Public License version 2, *    as published by the Free Software Foundation. */#include <Python.h>#include <xenctrl.h>#include <flask.h>#define PKG "xen.lowlevel.flask"#define CLS "flask"#define CTX_LEN 1024static PyObject *xc_error_obj;typedef struct {    PyObject_HEAD;    int xc_handle;} XcObject;static PyObject *pyflask_context_to_sid(PyObject *self, PyObject *args,                                                                 PyObject *kwds){    int xc_handle;    char *ctx;    char *buf;    uint32_t len;    uint32_t sid;    int ret;    static char *kwd_list[] = { "context", NULL };    if ( !PyArg_ParseTupleAndKeywords(args, kwds, "s", kwd_list,                                      &ctx) )        return NULL;    len = strlen(ctx);    buf = malloc(len);    if (!buf) {        errno = -ENOMEM;        PyErr_SetFromErrno(xc_error_obj);    }        memcpy(buf, ctx, len);        xc_handle = xc_interface_open();    if (xc_handle < 0) {        errno = xc_handle;        return PyErr_SetFromErrno(xc_error_obj);    }        ret = flask_context_to_sid(xc_handle, buf, len, &sid);            xc_interface_close(xc_handle);    free(buf);        if ( ret != 0 ) {        errno = -ret;        return PyErr_SetFromErrno(xc_error_obj);    }    return PyInt_FromLong(sid);}static PyObject *pyflask_sid_to_context(PyObject *self, PyObject *args,                                                                 PyObject *kwds){    int xc_handle;    uint32_t sid;    char ctx[CTX_LEN];    uint32_t ctx_len = CTX_LEN;    int ret;    static char *kwd_list[] = { "sid", NULL };    if ( !PyArg_ParseTupleAndKeywords(args, kwds, "i", kwd_list,                                      &sid) )        return NULL;    xc_handle = xc_interface_open();    if (xc_handle < 0) {        errno = xc_handle;        return PyErr_SetFromErrno(xc_error_obj);    }        ret = flask_sid_to_context(xc_handle, sid, ctx, ctx_len);        xc_interface_close(xc_handle);        if ( ret != 0 ) {        errno = -ret;        return PyErr_SetFromErrno(xc_error_obj);    }    return Py_BuildValue("s", ctx, ctx_len);}static PyMethodDef pyflask_methods[] = {    { "flask_context_to_sid",      (PyCFunction)pyflask_context_to_sid,      METH_KEYWORDS, "\n"      "Convert a context string to a dynamic SID.\n"      " context [str]: String specifying context to be converted\n"      "Returns: [int]: Numeric SID on success; -1 on error.\n" },    { "flask_sid_to_context",      (PyCFunction)pyflask_sid_to_context,      METH_KEYWORDS, "\n"      "Convert a dynamic SID to context string.\n"      " context [int]: SID to be converted\n"      "Returns: [str]: Numeric SID on success; -1 on error.\n" },    { NULL, NULL, 0, NULL }};PyMODINIT_FUNC initflask(void){    Py_InitModule("flask", pyflask_methods);}/* * Local variables: *  c-indent-level: 4 *  c-basic-offset: 4 * End: */