mirror of
https://github.com/QuasarApp/pe-parse.git
synced 2025-04-29 05:44:32 +00:00
53fb7e7d2c
There was some weird memory corruption caused by how pepy_parsed_init() was parsing arguments. The result was that accessing attributes or methods which didn't exist would periodically cause segfaults. This code was leftover from an earlier way of doing things and doesn't need to be done this way. Just parse straight to a C style string instead of this crap. Also implement support for signature, machine support. Also, add Py_TPFLAGS_BASETYPE as you should.
347 lines
12 KiB
C++
347 lines
12 KiB
C++
/*
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* Copyright (c) 2013, Wesley Shields <wxs@atarininja.org>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <Python.h>
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#include <structmember.h>
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#include "parse.h"
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#define PEPY_VERSION "0.1"
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static PyObject *pepy_error;
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typedef struct {
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PyObject_HEAD
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} pepy;
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typedef struct {
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PyObject_HEAD
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PyObject *signature;
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PyObject *machine;
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PyObject *timedatestamp;
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parsed_pe *pe;
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} pepy_parsed;
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static PyObject *pepy_parsed_new(PyTypeObject *type, PyObject *args, PyObject *kwds) {
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pepy_parsed *self;
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self = (pepy_parsed *) type->tp_alloc(type, 0);
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return (PyObject *) self;
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}
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static int pepy_parsed_init(pepy_parsed *self, PyObject *args, PyObject *kwds) {
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char *pe_path;
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if (!PyArg_ParseTuple(args, "s:pepy_parse", &pe_path))
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return -1;
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if (!pe_path)
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return -1;
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self->pe = ParsePEFromFile(pe_path);
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if (!self->pe) {
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return -2;
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}
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self->signature = PyInt_FromLong(self->pe->peHeader.nt.Signature);
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self->machine = PyInt_FromLong(self->pe->peHeader.nt.FileHeader.Machine);
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self->timedatestamp = PyInt_FromLong(self->pe->peHeader.nt.FileHeader.TimeDateStamp);
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return 0;
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}
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static void pepy_parsed_dealloc(pepy_parsed *self) {
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DestructParsedPE(self->pe);
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Py_XDECREF(self->signature);
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Py_XDECREF(self->machine);
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Py_XDECREF(self->timedatestamp);
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self->ob_type->tp_free((PyObject *) self);
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}
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static PyObject *pepy_parsed_get_entry_point(PyObject *self, PyObject *args) {
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VA entrypoint;
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PyObject *ret;
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if (!GetEntryPoint(((pepy_parsed *) self)->pe, entrypoint))
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Py_RETURN_NONE;
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ret = PyLong_FromLongLong(entrypoint);
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if (!ret) {
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PyErr_SetString(pepy_error, "Unable to create return object.");
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return NULL;
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}
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return ret;
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}
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static PyObject *pepy_parsed_get_bytes(PyObject *self, PyObject *args) {
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uint64_t start, idx;
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uint8_t b;
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Py_ssize_t len;
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PyObject *byte, *ret;
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if (!PyArg_ParseTuple(args, "KK:pepy_parsed_get_bytes", &start, &len))
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return NULL;
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/*
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* XXX: I want this to be using PyByteArray_FromStringAndSize(),
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* but, I'm not sure how to get what I need out of the parsed PE
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* to make it work.
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*/
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ret = PyList_New(len);
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if (!ret) {
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PyErr_SetString(pepy_error, "Unable to create new list.");
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return NULL;
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}
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for (idx = 0; idx < len; idx++) {
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if (!ReadByteAtVA(((pepy_parsed *) self)->pe, start + idx, b))
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return ret;
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byte = PyInt_FromLong(b);
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PyList_SET_ITEM(ret, idx, byte);
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}
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return ret;
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}
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int section_callback(void *cbd, VA base, std::string &name, image_section_header s, bounded_buffer *data) {
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PyObject *vals;
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PyObject *list = (PyObject *) cbd;
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PyObject *sect = PyDict_New();
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Py_ssize_t i = 0;
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/* This order must match the order of the tuple (vals). */
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const char *keys[] = { "name", "base", "size", "virtaddr", "virtsize",
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"relocs", "linenums", "characteristics" };
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if (!sect)
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return 0;
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vals = Py_BuildValue("sKKIIHHI", name.c_str(), base, data->bufLen,
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s.VirtualAddress, s.Misc.VirtualSize,
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s.NumberOfRelocations, s.NumberOfLinenumbers,
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s.Characteristics);
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if (!vals)
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Py_DECREF(sect);
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for (i = 0; i <= 7; i++) {
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if (PyDict_SetItemString(sect, keys[i], PyTuple_GetItem(vals, i)) == -1) {
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Py_DECREF(vals);
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Py_DECREF(sect);
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return 0;
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}
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}
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if (PyList_Append(list, sect) == -1) {
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Py_DECREF(vals);
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Py_DECREF(sect);
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}
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return 0;
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}
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static PyObject *pepy_parsed_get_sections(PyObject *self, PyObject *args) {
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PyObject *ret = PyList_New(0);
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if (!ret) {
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PyErr_SetString(pepy_error, "Unable to create new list.");
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return NULL;
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}
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IterSec(((pepy_parsed *)self)->pe, section_callback, ret);
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return ret;
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}
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static PyMemberDef pepy_parsed_members[] = {
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{ (char *) "signature", T_OBJECT_EX,
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offsetof(pepy_parsed, signature), RO, (char *) "Signature" },
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{ (char *) "machine", T_OBJECT_EX, offsetof(pepy_parsed, machine), RO,
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(char *) "Machine" },
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{ (char *) "timedatestamp", T_OBJECT_EX,
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offsetof(pepy_parsed, timedatestamp), RO, (char *) "Timestamp" },
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{ NULL }
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};
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static PyMethodDef pepy_parsed_methods[] = {
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{ "get_entry_point", pepy_parsed_get_entry_point, METH_NOARGS,
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"Return the entry point address." },
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{ "get_bytes", pepy_parsed_get_bytes, METH_VARARGS,
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"Return the first N bytes at a given address." },
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{ "get_sections", pepy_parsed_get_sections, METH_NOARGS,
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"Return a list of dictionaries describing the sections." },
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{ NULL }
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};
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static PyTypeObject pepy_parsed_type = {
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PyObject_HEAD_INIT(NULL)
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0, /* ob_size */
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"pepy.parsed", /* tp_name */
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sizeof(pepy_parsed), /* tp_basicsize */
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0, /* tp_itemsize */
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(destructor) pepy_parsed_dealloc, /* tp_dealloc */
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0, /* tp_print */
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0, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_compare */
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0, /* tp_repr */
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0, /* tp_as_number */
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0, /* tp_as_sequence */
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0, /* tp_as_mapping */
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0, /* tp_hash */
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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
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"pepy parsed object", /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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pepy_parsed_methods, /* tp_methods */
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pepy_parsed_members, /* tp_members */
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0, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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0, /* tp_descr_get */
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0, /* tp_descr_set */
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0, /* tp_dictoffset */
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(initproc) pepy_parsed_init, /* tp_init */
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0, /* tp_alloc */
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pepy_parsed_new /* tp_new */
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};
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static PyObject *pepy_parse(PyObject *self, PyObject *args) {
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PyObject *parsed;
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int ret;
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parsed = pepy_parsed_new(&pepy_parsed_type, NULL, NULL);
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if (!parsed) {
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PyErr_SetString(pepy_error, "Unable to make new parsed object.");
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return NULL;
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}
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ret = pepy_parsed_init((pepy_parsed *) parsed, args, NULL);
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if (ret < 0) {
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if (ret == -2)
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PyErr_SetString(pepy_error, "Unable to parse PE file.");
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else
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PyErr_SetString(pepy_error, "Unable to init new parsed object.");
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return NULL;
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}
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return parsed;
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}
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static PyMethodDef pepy_methods[] = {
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{ "parse", pepy_parse, METH_VARARGS, "Parse PE from file." },
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{ NULL }
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};
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PyMODINIT_FUNC initpepy(void) {
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PyObject *m;
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if (PyType_Ready(&pepy_parsed_type) < 0)
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return;
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m = Py_InitModule3("pepy", pepy_methods, "Python interface to pe-parse.");
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if (!m)
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return;
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pepy_error = PyErr_NewException((char *) "pepy.error", NULL, NULL);
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Py_INCREF(pepy_error);
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PyModule_AddObject(m, "error", pepy_error);
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Py_INCREF(&pepy_parsed_type);
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PyModule_AddObject(m, "pepy_parsed", (PyObject *) &pepy_parsed_type);
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PyModule_AddStringMacro(m, PEPY_VERSION);
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PyModule_AddIntMacro(m, MZ_MAGIC);
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PyModule_AddIntMacro(m, NT_MAGIC);
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PyModule_AddIntMacro(m, NUM_DIR_ENTRIES);
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PyModule_AddIntMacro(m, NT_OPTIONAL_32_MAGIC);
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PyModule_AddIntMacro(m, NT_SHORT_NAME_LEN);
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PyModule_AddIntMacro(m, DIR_EXPORT);
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PyModule_AddIntMacro(m, DIR_IMPORT);
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PyModule_AddIntMacro(m, DIR_RESOURCE);
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PyModule_AddIntMacro(m, DIR_EXCEPTION);
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PyModule_AddIntMacro(m, DIR_SECURITY);
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PyModule_AddIntMacro(m, DIR_BASERELOC);
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PyModule_AddIntMacro(m, DIR_DEBUG);
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PyModule_AddIntMacro(m, DIR_ARCHITECTURE);
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PyModule_AddIntMacro(m, DIR_GLOBALPTR);
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PyModule_AddIntMacro(m, DIR_TLS);
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PyModule_AddIntMacro(m, DIR_LOAD_CONFIG);
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PyModule_AddIntMacro(m, DIR_BOUND_IMPORT);
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PyModule_AddIntMacro(m, DIR_IAT);
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PyModule_AddIntMacro(m, DIR_DELAY_IMPORT);
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PyModule_AddIntMacro(m, DIR_COM_DESCRIPTOR);
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PyModule_AddIntMacro(m, IMAGE_SCN_TYPE_NO_PAD);
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PyModule_AddIntMacro(m, IMAGE_SCN_CNT_CODE);
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PyModule_AddIntMacro(m, IMAGE_SCN_CNT_INITIALIZED_DATA);
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PyModule_AddIntMacro(m, IMAGE_SCN_CNT_UNINITIALIZED_DATA);
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PyModule_AddIntMacro(m, IMAGE_SCN_LNK_OTHER);
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PyModule_AddIntMacro(m, IMAGE_SCN_LNK_INFO);
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PyModule_AddIntMacro(m, IMAGE_SCN_LNK_REMOVE);
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PyModule_AddIntMacro(m, IMAGE_SCN_LNK_COMDAT);
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PyModule_AddIntMacro(m, IMAGE_SCN_NO_DEFER_SPEC_EXC);
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PyModule_AddIntMacro(m, IMAGE_SCN_GPREL);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_FARDATA);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_PURGEABLE);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_16BIT);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_LOCKED);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_PRELOAD);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_1BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_2BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_4BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_8BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_16BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_32BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_64BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_128BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_256BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_512BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_1024BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_2048BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_4096BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_8192BYTES);
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PyModule_AddIntMacro(m, IMAGE_SCN_ALIGN_MASK);
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PyModule_AddIntMacro(m, IMAGE_SCN_LNK_NRELOC_OVFL);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_DISCARDABLE);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_NOT_CACHED);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_NOT_PAGED);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_SHARED);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_EXECUTE);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_READ);
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PyModule_AddIntMacro(m, IMAGE_SCN_MEM_WRITE);
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}
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