xref: /third_party/python/Modules/_cryptmodule.c (revision 7db96d56) 
1/* cryptmodule.c - by Steve Majewski
2 */
3
4#include "Python.h"
5
6#include <sys/types.h>
7#ifdef HAVE_CRYPT_H
8#include <crypt.h>
9#endif
10
11/* Module crypt */
12
13/*[clinic input]
14module crypt
15[clinic start generated code]*/
16/*[clinic end generated code: output=da39a3ee5e6b4b0d input=c6252cf4f2f2ae81]*/
17
18#include "clinic/_cryptmodule.c.h"
19
20/*[clinic input]
21crypt.crypt
22
23    word: str
24    salt: str
25    /
26
27Hash a *word* with the given *salt* and return the hashed password.
28
29*word* will usually be a user's password.  *salt* (either a random 2 or 16
30character string, possibly prefixed with $digit$ to indicate the method)
31will be used to perturb the encryption algorithm and produce distinct
32results for a given *word*.
33
34[clinic start generated code]*/
35
36static PyObject *
37crypt_crypt_impl(PyObject *module, const char *word, const char *salt)
38/*[clinic end generated code: output=0512284a03d2803c input=0e8edec9c364352b]*/
39{
40    char *crypt_result;
41#ifdef HAVE_CRYPT_R
42    struct crypt_data data;
43    memset(&data, 0, sizeof(data));
44    crypt_result = crypt_r(word, salt, &data);
45#else
46    crypt_result = crypt(word, salt);
47#endif
48    if (crypt_result == NULL) {
49        return PyErr_SetFromErrno(PyExc_OSError);
50    }
51    return Py_BuildValue("s", crypt_result);
52}
53
54
55static PyMethodDef crypt_methods[] = {
56    CRYPT_CRYPT_METHODDEF
57    {NULL,              NULL}           /* sentinel */
58};
59
60static PyModuleDef_Slot _crypt_slots[] = {
61    {0, NULL}
62};
63
64static struct PyModuleDef cryptmodule = {
65    PyModuleDef_HEAD_INIT,
66    "_crypt",
67    NULL,
68    0,
69    crypt_methods,
70    _crypt_slots,
71    NULL,
72    NULL,
73    NULL
74};
75
76PyMODINIT_FUNC
77PyInit__crypt(void)
78{
79    return PyModuleDef_Init(&cryptmodule);
80}
81