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bpo-1635741: Port _blake2 module to multi-phase init (GH-21856)

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Port the _blake2 extension module to the multi-phase
initialization API (PEP 489).
This commit is contained in:
Mohamed Koubaa 2020-09-02 04:45:13 -05:00 • committed by GitHub
parent 749ed85e44
commit a7f026870d
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 121 additions and 120 deletions
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121
Modules/_blake2/blake2module.c
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@ -12,62 +12,81 @@
#include "impl/blake2.h"
extern PyTypeObject PyBlake2_BLAKE2bType;
extern PyTypeObject PyBlake2_BLAKE2sType;
extern PyType_Spec blake2b_type_spec;
extern PyType_Spec blake2s_type_spec;
PyDoc_STRVAR(blake2mod__doc__,
"_blake2b provides BLAKE2b for hashlib\n"
);
typedef struct {
PyTypeObject* blake2b_type;
PyTypeObject* blake2s_type;
} Blake2State;
static inline Blake2State*
blake2_get_state(PyObject *module)
{
void *state = PyModule_GetState(module);
assert(state != NULL);
return (Blake2State *)state;
}
static struct PyMethodDef blake2mod_functions[] = {
{NULL, NULL}
};
static struct PyModuleDef blake2_module = {
PyModuleDef_HEAD_INIT,
"_blake2",
blake2mod__doc__,
-1,
blake2mod_functions,
NULL,
NULL,
NULL,
NULL
};
static int
_blake2_traverse(PyObject *module, visitproc visit, void *arg)
{
Blake2State *state = blake2_get_state(module);
Py_VISIT(state->blake2b_type);
Py_VISIT(state->blake2s_type);
return 0;
}
static int
_blake2_clear(PyObject *module)
{
Blake2State *state = blake2_get_state(module);
Py_CLEAR(state->blake2b_type);
Py_CLEAR(state->blake2s_type);
return 0;
}
static void
_blake2_free(void *module)
{
_blake2_clear((PyObject *)module);
}
#define ADD_INT(d, name, value) do { \
PyObject *x = PyLong_FromLong(value); \
if (!x) { \
Py_DECREF(m); \
return NULL; \
} \
if (!x) \
return -1; \
if (PyDict_SetItemString(d, name, x) < 0) { \
Py_DECREF(m); \
return NULL; \
Py_DECREF(x); \
return -1; \
} \
Py_DECREF(x); \
} while(0)
PyMODINIT_FUNC
PyInit__blake2(void)
static int
blake2_exec(PyObject *m)
{
PyObject *m;
PyObject *d;
Blake2State* st = blake2_get_state(m);
m = PyModule_Create(&blake2_module);
if (m == NULL)
return NULL;
st->blake2b_type = (PyTypeObject *)PyType_FromModuleAndSpec(
m, &blake2b_type_spec, NULL);
if (NULL == st->blake2b_type)
return -1;
/* BLAKE2b */
Py_SET_TYPE(&PyBlake2_BLAKE2bType, &PyType_Type);
if (PyModule_AddType(m, &PyBlake2_BLAKE2bType) < 0) {
return NULL;
if (PyModule_AddType(m, st->blake2b_type) < 0) {
return -1;
}
d = PyBlake2_BLAKE2bType.tp_dict;
PyObject *d = st->blake2b_type->tp_dict;
ADD_INT(d, "SALT_SIZE", BLAKE2B_SALTBYTES);
ADD_INT(d, "PERSON_SIZE", BLAKE2B_PERSONALBYTES);
ADD_INT(d, "MAX_KEY_SIZE", BLAKE2B_KEYBYTES);
@ -79,12 +98,17 @@ PyInit__blake2(void)
PyModule_AddIntConstant(m, "BLAKE2B_MAX_DIGEST_SIZE", BLAKE2B_OUTBYTES);
/* BLAKE2s */
Py_SET_TYPE(&PyBlake2_BLAKE2sType, &PyType_Type);
if (PyModule_AddType(m, &PyBlake2_BLAKE2sType) < 0) {
return NULL;
st->blake2s_type = (PyTypeObject *)PyType_FromModuleAndSpec(
m, &blake2s_type_spec, NULL);
if (NULL == st->blake2s_type)
return -1;
if (PyModule_AddType(m, st->blake2s_type) < 0) {
return -1;
}
d = PyBlake2_BLAKE2sType.tp_dict;
d = st->blake2s_type->tp_dict;
ADD_INT(d, "SALT_SIZE", BLAKE2S_SALTBYTES);
ADD_INT(d, "PERSON_SIZE", BLAKE2S_PERSONALBYTES);
ADD_INT(d, "MAX_KEY_SIZE", BLAKE2S_KEYBYTES);
@ -95,5 +119,28 @@ PyInit__blake2(void)
PyModule_AddIntConstant(m, "BLAKE2S_MAX_KEY_SIZE", BLAKE2S_KEYBYTES);
PyModule_AddIntConstant(m, "BLAKE2S_MAX_DIGEST_SIZE", BLAKE2S_OUTBYTES);
return m;
return 0;
}
static PyModuleDef_Slot _blake2_slots[] = {
{Py_mod_exec, blake2_exec},
{0, NULL}
};
static struct PyModuleDef blake2_module = {
PyModuleDef_HEAD_INIT,
"_blake2",
.m_doc = blake2mod__doc__,
.m_size = sizeof(Blake2State),
.m_methods = blake2mod_functions,
.m_slots = _blake2_slots,
.m_traverse = _blake2_traverse,
.m_clear = _blake2_clear,
.m_free = _blake2_free,
};
PyMODINIT_FUNC
PyInit__blake2(void)
{
return PyModuleDef_Init(&blake2_module);
}