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https://github.com/python/cpython.git
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a6465605c1
Always use an individual lock on hash objects when in free-threaded builds. Fixes #111916
417 lines
11 KiB
C
417 lines
11 KiB
C
/*
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* Written in 2013 by Dmitry Chestnykh <dmitry@codingrobots.com>
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* Modified for CPython by Christian Heimes <christian@python.org>
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*
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* To the extent possible under law, the author have dedicated all
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* copyright and related and neighboring rights to this software to
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* the public domain worldwide. This software is distributed without
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* any warranty. http://creativecommons.org/publicdomain/zero/1.0/
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*/
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/* WARNING: autogenerated file!
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*
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* The blake2s_impl.c is autogenerated from blake2b_impl.c.
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*/
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#ifndef Py_BUILD_CORE_BUILTIN
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# define Py_BUILD_CORE_MODULE 1
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#endif
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#include <stdbool.h>
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#include "Python.h"
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#include "pycore_strhex.h" // _Py_strhex()
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#include "../hashlib.h"
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#include "blake2module.h"
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#ifndef HAVE_LIBB2
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/* pure SSE2 implementation is very slow, so only use the more optimized SSSE3+
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* https://bugs.python.org/issue31834 */
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#if defined(__SSSE3__) || defined(__SSE4_1__) || defined(__AVX__) || defined(__XOP__)
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#include "impl/blake2b.c"
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#else
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#include "impl/blake2b-ref.c"
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#endif
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#endif // !HAVE_LIBB2
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#define HAVE_BLAKE2B 1
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extern PyType_Spec blake2b_type_spec;
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typedef struct {
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PyObject_HEAD
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blake2b_param param;
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blake2b_state state;
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bool use_mutex;
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PyMutex mutex;
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} BLAKE2bObject;
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#include "clinic/blake2b_impl.c.h"
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/*[clinic input]
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module _blake2
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class _blake2.blake2b "BLAKE2bObject *" "&PyBlake2_BLAKE2bType"
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=d47b0527b39c673f]*/
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static BLAKE2bObject *
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new_BLAKE2bObject(PyTypeObject *type)
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{
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BLAKE2bObject *self;
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self = (BLAKE2bObject *)type->tp_alloc(type, 0);
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if (self == NULL) {
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return NULL;
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}
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HASHLIB_INIT_MUTEX(self);
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return self;
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}
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/*[clinic input]
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@classmethod
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_blake2.blake2b.__new__ as py_blake2b_new
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data: object(c_default="NULL") = b''
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/
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*
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digest_size: int(c_default="BLAKE2B_OUTBYTES") = _blake2.blake2b.MAX_DIGEST_SIZE
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key: Py_buffer(c_default="NULL", py_default="b''") = None
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salt: Py_buffer(c_default="NULL", py_default="b''") = None
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person: Py_buffer(c_default="NULL", py_default="b''") = None
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fanout: int = 1
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depth: int = 1
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leaf_size: unsigned_long = 0
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node_offset: unsigned_long_long = 0
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node_depth: int = 0
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inner_size: int = 0
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last_node: bool = False
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usedforsecurity: bool = True
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Return a new BLAKE2b hash object.
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[clinic start generated code]*/
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static PyObject *
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py_blake2b_new_impl(PyTypeObject *type, PyObject *data, int digest_size,
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Py_buffer *key, Py_buffer *salt, Py_buffer *person,
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int fanout, int depth, unsigned long leaf_size,
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unsigned long long node_offset, int node_depth,
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int inner_size, int last_node, int usedforsecurity)
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/*[clinic end generated code: output=32bfd8f043c6896f input=b947312abff46977]*/
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{
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BLAKE2bObject *self = NULL;
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Py_buffer buf;
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self = new_BLAKE2bObject(type);
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if (self == NULL) {
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goto error;
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}
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/* Zero parameter block. */
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memset(&self->param, 0, sizeof(self->param));
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/* Set digest size. */
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if (digest_size <= 0 || digest_size > BLAKE2B_OUTBYTES) {
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PyErr_Format(PyExc_ValueError,
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"digest_size must be between 1 and %d bytes",
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BLAKE2B_OUTBYTES);
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goto error;
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}
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self->param.digest_length = digest_size;
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/* Set salt parameter. */
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if ((salt->obj != NULL) && salt->len) {
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if (salt->len > BLAKE2B_SALTBYTES) {
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PyErr_Format(PyExc_ValueError,
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"maximum salt length is %d bytes",
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BLAKE2B_SALTBYTES);
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goto error;
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}
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memcpy(self->param.salt, salt->buf, salt->len);
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}
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/* Set personalization parameter. */
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if ((person->obj != NULL) && person->len) {
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if (person->len > BLAKE2B_PERSONALBYTES) {
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PyErr_Format(PyExc_ValueError,
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"maximum person length is %d bytes",
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BLAKE2B_PERSONALBYTES);
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goto error;
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}
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memcpy(self->param.personal, person->buf, person->len);
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}
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/* Set tree parameters. */
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if (fanout < 0 || fanout > 255) {
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PyErr_SetString(PyExc_ValueError,
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"fanout must be between 0 and 255");
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goto error;
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}
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self->param.fanout = (uint8_t)fanout;
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if (depth <= 0 || depth > 255) {
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PyErr_SetString(PyExc_ValueError,
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"depth must be between 1 and 255");
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goto error;
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}
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self->param.depth = (uint8_t)depth;
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if (leaf_size > 0xFFFFFFFFU) {
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PyErr_SetString(PyExc_OverflowError, "leaf_size is too large");
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goto error;
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}
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// NB: Simple assignment here would be incorrect on big endian platforms.
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store32(&(self->param.leaf_length), leaf_size);
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#ifdef HAVE_BLAKE2S
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if (node_offset > 0xFFFFFFFFFFFFULL) {
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/* maximum 2**48 - 1 */
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PyErr_SetString(PyExc_OverflowError, "node_offset is too large");
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goto error;
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}
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store48(&(self->param.node_offset), node_offset);
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#else
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// NB: Simple assignment here would be incorrect on big endian platforms.
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store64(&(self->param.node_offset), node_offset);
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#endif
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if (node_depth < 0 || node_depth > 255) {
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PyErr_SetString(PyExc_ValueError,
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"node_depth must be between 0 and 255");
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goto error;
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}
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self->param.node_depth = node_depth;
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if (inner_size < 0 || inner_size > BLAKE2B_OUTBYTES) {
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PyErr_Format(PyExc_ValueError,
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"inner_size must be between 0 and is %d",
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BLAKE2B_OUTBYTES);
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goto error;
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}
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self->param.inner_length = inner_size;
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/* Set key length. */
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if ((key->obj != NULL) && key->len) {
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if (key->len > BLAKE2B_KEYBYTES) {
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PyErr_Format(PyExc_ValueError,
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"maximum key length is %d bytes",
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BLAKE2B_KEYBYTES);
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goto error;
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}
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self->param.key_length = (uint8_t)key->len;
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}
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/* Initialize hash state. */
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if (blake2b_init_param(&self->state, &self->param) < 0) {
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PyErr_SetString(PyExc_RuntimeError,
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"error initializing hash state");
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goto error;
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}
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/* Set last node flag (must come after initialization). */
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self->state.last_node = last_node;
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/* Process key block if any. */
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if (self->param.key_length) {
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uint8_t block[BLAKE2B_BLOCKBYTES];
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memset(block, 0, sizeof(block));
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memcpy(block, key->buf, key->len);
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blake2b_update(&self->state, block, sizeof(block));
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secure_zero_memory(block, sizeof(block));
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}
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/* Process initial data if any. */
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if (data != NULL) {
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GET_BUFFER_VIEW_OR_ERROR(data, &buf, goto error);
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if (buf.len >= HASHLIB_GIL_MINSIZE) {
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Py_BEGIN_ALLOW_THREADS
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blake2b_update(&self->state, buf.buf, buf.len);
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Py_END_ALLOW_THREADS
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} else {
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blake2b_update(&self->state, buf.buf, buf.len);
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}
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PyBuffer_Release(&buf);
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}
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return (PyObject *)self;
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error:
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if (self != NULL) {
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Py_DECREF(self);
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}
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return NULL;
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}
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/*[clinic input]
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_blake2.blake2b.copy
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Return a copy of the hash object.
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[clinic start generated code]*/
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static PyObject *
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_blake2_blake2b_copy_impl(BLAKE2bObject *self)
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/*[clinic end generated code: output=ff6acee5f93656ae input=e383c2d199fd8a2e]*/
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{
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BLAKE2bObject *cpy;
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if ((cpy = new_BLAKE2bObject(Py_TYPE(self))) == NULL)
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return NULL;
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ENTER_HASHLIB(self);
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cpy->param = self->param;
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cpy->state = self->state;
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LEAVE_HASHLIB(self);
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return (PyObject *)cpy;
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}
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/*[clinic input]
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_blake2.blake2b.update
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data: object
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/
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Update this hash object's state with the provided bytes-like object.
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[clinic start generated code]*/
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static PyObject *
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_blake2_blake2b_update(BLAKE2bObject *self, PyObject *data)
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/*[clinic end generated code: output=010dfcbe22654359 input=ffc4aa6a6a225d31]*/
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{
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Py_buffer buf;
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GET_BUFFER_VIEW_OR_ERROUT(data, &buf);
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if (!self->use_mutex && buf.len >= HASHLIB_GIL_MINSIZE) {
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self->use_mutex = true;
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}
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if (self->use_mutex) {
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Py_BEGIN_ALLOW_THREADS
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PyMutex_Lock(&self->mutex);
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blake2b_update(&self->state, buf.buf, buf.len);
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PyMutex_Unlock(&self->mutex);
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Py_END_ALLOW_THREADS
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} else {
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blake2b_update(&self->state, buf.buf, buf.len);
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}
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PyBuffer_Release(&buf);
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Py_RETURN_NONE;
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}
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/*[clinic input]
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_blake2.blake2b.digest
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Return the digest value as a bytes object.
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[clinic start generated code]*/
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static PyObject *
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_blake2_blake2b_digest_impl(BLAKE2bObject *self)
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/*[clinic end generated code: output=a5864660f4bfc61a input=7d21659e9c5fff02]*/
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{
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uint8_t digest[BLAKE2B_OUTBYTES];
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blake2b_state state_cpy;
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ENTER_HASHLIB(self);
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state_cpy = self->state;
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blake2b_final(&state_cpy, digest, self->param.digest_length);
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LEAVE_HASHLIB(self);
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return PyBytes_FromStringAndSize((const char *)digest,
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self->param.digest_length);
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}
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/*[clinic input]
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_blake2.blake2b.hexdigest
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Return the digest value as a string of hexadecimal digits.
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[clinic start generated code]*/
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static PyObject *
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_blake2_blake2b_hexdigest_impl(BLAKE2bObject *self)
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/*[clinic end generated code: output=b5598a87d8794a60 input=76930f6946351f56]*/
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{
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uint8_t digest[BLAKE2B_OUTBYTES];
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blake2b_state state_cpy;
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ENTER_HASHLIB(self);
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state_cpy = self->state;
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blake2b_final(&state_cpy, digest, self->param.digest_length);
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LEAVE_HASHLIB(self);
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return _Py_strhex((const char *)digest, self->param.digest_length);
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}
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static PyMethodDef py_blake2b_methods[] = {
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_BLAKE2_BLAKE2B_COPY_METHODDEF
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_BLAKE2_BLAKE2B_DIGEST_METHODDEF
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_BLAKE2_BLAKE2B_HEXDIGEST_METHODDEF
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_BLAKE2_BLAKE2B_UPDATE_METHODDEF
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{NULL, NULL}
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};
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static PyObject *
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py_blake2b_get_name(BLAKE2bObject *self, void *closure)
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{
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return PyUnicode_FromString("blake2b");
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}
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static PyObject *
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py_blake2b_get_block_size(BLAKE2bObject *self, void *closure)
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{
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return PyLong_FromLong(BLAKE2B_BLOCKBYTES);
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}
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static PyObject *
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py_blake2b_get_digest_size(BLAKE2bObject *self, void *closure)
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{
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return PyLong_FromLong(self->param.digest_length);
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}
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static PyGetSetDef py_blake2b_getsetters[] = {
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{"name", (getter)py_blake2b_get_name,
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NULL, NULL, NULL},
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{"block_size", (getter)py_blake2b_get_block_size,
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NULL, NULL, NULL},
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{"digest_size", (getter)py_blake2b_get_digest_size,
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NULL, NULL, NULL},
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{NULL}
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};
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static void
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py_blake2b_dealloc(PyObject *self)
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{
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BLAKE2bObject *obj = (BLAKE2bObject *)self;
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/* Try not to leave state in memory. */
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secure_zero_memory(&obj->param, sizeof(obj->param));
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secure_zero_memory(&obj->state, sizeof(obj->state));
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PyTypeObject *type = Py_TYPE(self);
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PyObject_Free(self);
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Py_DECREF(type);
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}
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static PyType_Slot blake2b_type_slots[] = {
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{Py_tp_dealloc, py_blake2b_dealloc},
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{Py_tp_doc, (char *)py_blake2b_new__doc__},
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{Py_tp_methods, py_blake2b_methods},
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{Py_tp_getset, py_blake2b_getsetters},
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{Py_tp_new, py_blake2b_new},
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{0,0}
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};
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PyType_Spec blake2b_type_spec = {
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.name = "_blake2.blake2b",
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.basicsize = sizeof(BLAKE2bObject),
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.flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_IMMUTABLETYPE,
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.slots = blake2b_type_slots
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};
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