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/*
* Written in 2013 by Dmitry Chestnykh <dmitry@codingrobots.com>
* Modified for CPython by Christian Heimes <christian@python.org>
*
* To the extent possible under law, the author have dedicated all
* copyright and related and neighboring rights to this software to
* the public domain worldwide. This software is distributed without
* any warranty. http://creativecommons.org/publicdomain/zero/1.0/
*/
#include "Python.h"
#include "impl/blake2.h"
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 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) \
return -1; \
if (PyDict_SetItemString(d, name, x) < 0) { \
Py_DECREF(x); \
return -1; \
} \
Py_DECREF(x); \
} while(0)
static int
blake2_exec(PyObject *m)
{
Blake2State* st = blake2_get_state(m);
st->blake2b_type = (PyTypeObject *)PyType_FromModuleAndSpec(
m, &blake2b_type_spec, NULL);
if (NULL == st->blake2b_type)
return -1;
/* BLAKE2b */
if (PyModule_AddType(m, st->blake2b_type) < 0) {
return -1;
}
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);
ADD_INT(d, "MAX_DIGEST_SIZE", BLAKE2B_OUTBYTES);
PyModule_AddIntConstant(m, "BLAKE2B_SALT_SIZE", BLAKE2B_SALTBYTES);
PyModule_AddIntConstant(m, "BLAKE2B_PERSON_SIZE", BLAKE2B_PERSONALBYTES);
PyModule_AddIntConstant(m, "BLAKE2B_MAX_KEY_SIZE", BLAKE2B_KEYBYTES);
PyModule_AddIntConstant(m, "BLAKE2B_MAX_DIGEST_SIZE", BLAKE2B_OUTBYTES);
/* BLAKE2s */
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 = 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);
ADD_INT(d, "MAX_DIGEST_SIZE", BLAKE2S_OUTBYTES);
PyModule_AddIntConstant(m, "BLAKE2S_SALT_SIZE", BLAKE2S_SALTBYTES);
PyModule_AddIntConstant(m, "BLAKE2S_PERSON_SIZE", BLAKE2S_PERSONALBYTES);
PyModule_AddIntConstant(m, "BLAKE2S_MAX_KEY_SIZE", BLAKE2S_KEYBYTES);
PyModule_AddIntConstant(m, "BLAKE2S_MAX_DIGEST_SIZE", BLAKE2S_OUTBYTES);
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);
}
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