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https://github.com/libretro/RetroArch
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bfc366decc
Example: find . -type f -iname '*.c' | while read -r i; do cat -s "$i" > "$i.new" mv "$i.new" "$i" done
126 lines
3.9 KiB
C
126 lines
3.9 KiB
C
/* Copyright (c) 2011 PSL1GHT Development Team
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <Python.h>
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static PyObject *sha1_callback = NULL;
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static void manipulate(uint8_t *key)
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{
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uint64_t temp = key[0x38] << 56|
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key[0x39] << 48|
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key[0x3a] << 40|
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key[0x3b] << 32|
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key[0x3c] << 24|
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key[0x3d] << 16|
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key[0x3e] << 8|
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key[0x3f];
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temp++;
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key[0x38] = (temp >> 56) & 0xff;
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key[0x39] = (temp >> 48) & 0xff;
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key[0x3a] = (temp >> 40) & 0xff;
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key[0x3b] = (temp >> 32) & 0xff;
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key[0x3c] = (temp >> 24) & 0xff;
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key[0x3d] = (temp >> 16) & 0xff;
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key[0x3e] = (temp >> 8) & 0xff;
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key[0x3f] = (temp >> 0) & 0xff;
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}
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static PyObject* pkg_crypt(PyObject *self, PyObject *args)
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{
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uint8_t *key, *input, *ret;
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int key_length, input_length, length;
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int remaining, i, offset=0;
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PyObject *arglist;
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PyObject *result;
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if (!PyArg_ParseTuple(args, "s#s#i", &key, &key_length, &input, &input_length, &length))
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return NULL;
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ret = malloc(length);
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remaining = length;
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while (remaining > 0)
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{
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int outHash_length;
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uint8_t *outHash;
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int bytes_to_dump = remaining;
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if (bytes_to_dump > 0x10)
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bytes_to_dump = 0x10;
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arglist = Py_BuildValue("(s#)", key, 0x40);
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result = PyObject_CallObject(sha1_callback, arglist);
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Py_DECREF(arglist);
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if (!result)
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return NULL;
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if (!PyArg_Parse(result, "s#", &outHash, &outHash_length))
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return NULL;
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for(i = 0; i < bytes_to_dump; i++)
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{
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ret[offset] = outHash[i] ^ input[offset];
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offset++;
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}
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Py_DECREF(result);
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manipulate(key);
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remaining -= bytes_to_dump;
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}
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/* Return the encrypted data */
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PyObject *py_ret = Py_BuildValue("s#", ret, length);
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free(ret);
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return py_ret;
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}
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static PyObject *register_sha1_callback(PyObject *self, PyObject *args)
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{
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PyObject *result = NULL;
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PyObject *temp;
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if (PyArg_ParseTuple(args, "O:set_callback", &temp))
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{
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if (!PyCallable_Check(temp))
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{
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PyErr_SetString(PyExc_TypeError, "parameter must be callable");
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return NULL;
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}
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Py_XINCREF(temp); /* Add a reference to new callback */
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Py_XDECREF(sha1_callback); /* Dispose of previous callback */
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sha1_callback = temp; /* Remember new callback */
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/* Boilerplate to return "None" */
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Py_INCREF(Py_None);
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result = Py_None;
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}
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return result;
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}
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static PyMethodDef cryptMethods[] = {
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{"pkgcrypt", pkg_crypt, METH_VARARGS, "C implementation of pkg.py's crypt function"},
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{"register_sha1_callback", register_sha1_callback, METH_VARARGS, "Register a callback to python's SHA1 function, so we don't have to bother with creating our own implementation."},
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{NULL, NULL, 0, NULL}
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};
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PyMODINIT_FUNC initpkgcrypt(void)
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{
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(void) Py_InitModule("pkgcrypt", cryptMethods);
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}
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