diff options
Diffstat (limited to 'Modules/_blake2/blake2s_impl.c')
| -rw-r--r-- | Modules/_blake2/blake2s_impl.c | 460 |
1 files changed, 460 insertions, 0 deletions
diff --git a/Modules/_blake2/blake2s_impl.c b/Modules/_blake2/blake2s_impl.c new file mode 100644 index 0000000..8b38270 --- /dev/null +++ b/Modules/_blake2/blake2s_impl.c @@ -0,0 +1,460 @@ +/* + * 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/ + */ + +/* WARNING: autogenerated file! + * + * The blake2s_impl.c is autogenerated from blake2s_impl.c. + */ + +#include "Python.h" +#include "pystrhex.h" +#ifdef WITH_THREAD +#include "pythread.h" +#endif + +#include "../hashlib.h" +#include "blake2ns.h" + +#define HAVE_BLAKE2S 1 +#define BLAKE2_LOCAL_INLINE(type) Py_LOCAL_INLINE(type) + +#include "impl/blake2.h" +#include "impl/blake2-impl.h" /* for secure_zero_memory() and store48() */ + +#ifdef BLAKE2_USE_SSE +#include "impl/blake2s.c" +#else +#include "impl/blake2s-ref.c" +#endif + + +extern PyTypeObject PyBlake2_BLAKE2sType; + +typedef struct { + PyObject_HEAD + blake2s_param param; + blake2s_state state; +#ifdef WITH_THREAD + PyThread_type_lock lock; +#endif +} BLAKE2sObject; + +#include "clinic/blake2s_impl.c.h" + +/*[clinic input] +module _blake2s +class _blake2s.blake2s "BLAKE2sObject *" "&PyBlake2_BLAKE2sType" +[clinic start generated code]*/ +/*[clinic end generated code: output=da39a3ee5e6b4b0d input=edbfcf7557a685a7]*/ + + +static BLAKE2sObject * +new_BLAKE2sObject(PyTypeObject *type) +{ + BLAKE2sObject *self; + self = (BLAKE2sObject *)type->tp_alloc(type, 0); +#ifdef WITH_THREAD + if (self != NULL) { + self->lock = NULL; + } +#endif + return self; +} + +/*[clinic input] +@classmethod +_blake2s.blake2s.__new__ as py_blake2s_new + string as data: object = NULL + * + digest_size: int(c_default="BLAKE2S_OUTBYTES") = _blake2s.blake2s.MAX_DIGEST_SIZE + key: Py_buffer = None + salt: Py_buffer = None + person: Py_buffer = None + fanout: int = 1 + depth: int = 1 + leaf_size as leaf_size_obj: object = NULL + node_offset as node_offset_obj: object = NULL + node_depth: int = 0 + inner_size: int = 0 + last_node: bool = False + +Return a new BLAKE2s hash object. +[clinic start generated code]*/ + +static PyObject * +py_blake2s_new_impl(PyTypeObject *type, PyObject *data, int digest_size, + Py_buffer *key, Py_buffer *salt, Py_buffer *person, + int fanout, int depth, PyObject *leaf_size_obj, + PyObject *node_offset_obj, int node_depth, + int inner_size, int last_node) +/*[clinic end generated code: output=fe060b258a8cbfc6 input=458cfdcb3d0d47ff]*/ +{ + BLAKE2sObject *self = NULL; + Py_buffer buf; + + unsigned long leaf_size = 0; + unsigned PY_LONG_LONG node_offset = 0; + + self = new_BLAKE2sObject(type); + if (self == NULL) { + goto error; + } + + /* Zero parameter block. */ + memset(&self->param, 0, sizeof(self->param)); + + /* Set digest size. */ + if (digest_size <= 0 || digest_size > BLAKE2S_OUTBYTES) { + PyErr_Format(PyExc_ValueError, + "digest_size must be between 1 and %d bytes", + BLAKE2S_OUTBYTES); + goto error; + } + self->param.digest_length = digest_size; + + /* Set salt parameter. */ + if ((salt->obj != NULL) && salt->len) { + if (salt->len > BLAKE2S_SALTBYTES) { + PyErr_Format(PyExc_ValueError, + "maximum salt length is %d bytes", + BLAKE2S_SALTBYTES); + goto error; + } + memcpy(self->param.salt, salt->buf, salt->len); + } + + /* Set personalization parameter. */ + if ((person->obj != NULL) && person->len) { + if (person->len > BLAKE2S_PERSONALBYTES) { + PyErr_Format(PyExc_ValueError, + "maximum person length is %d bytes", + BLAKE2S_PERSONALBYTES); + goto error; + } + memcpy(self->param.personal, person->buf, person->len); + } + + /* Set tree parameters. */ + if (fanout < 0 || fanout > 255) { + PyErr_SetString(PyExc_ValueError, + "fanout must be between 0 and 255"); + goto error; + } + self->param.fanout = (uint8_t)fanout; + + if (depth <= 0 || depth > 255) { + PyErr_SetString(PyExc_ValueError, + "depth must be between 1 and 255"); + goto error; + } + self->param.depth = (uint8_t)depth; + + if (leaf_size_obj != NULL) { + leaf_size = PyLong_AsUnsignedLong(leaf_size_obj); + if (leaf_size == (unsigned long) -1 && PyErr_Occurred()) { + goto error; + } + if (leaf_size > 0xFFFFFFFFU) { + PyErr_SetString(PyExc_OverflowError, "leaf_size is too large"); + goto error; + } + } + self->param.leaf_length = (unsigned int)leaf_size; + + if (node_offset_obj != NULL) { + node_offset = PyLong_AsUnsignedLongLong(node_offset_obj); + if (node_offset == (unsigned PY_LONG_LONG) -1 && PyErr_Occurred()) { + goto error; + } + } +#ifdef HAVE_BLAKE2S + if (node_offset > 0xFFFFFFFFFFFFULL) { + /* maximum 2**48 - 1 */ + PyErr_SetString(PyExc_OverflowError, "node_offset is too large"); + goto error; + } + store48(&(self->param.node_offset), node_offset); +#else + self->param.node_offset = node_offset; +#endif + + if (node_depth < 0 || node_depth > 255) { + PyErr_SetString(PyExc_ValueError, + "node_depth must be between 0 and 255"); + goto error; + } + self->param.node_depth = node_depth; + + if (inner_size < 0 || inner_size > BLAKE2S_OUTBYTES) { + PyErr_Format(PyExc_ValueError, + "inner_size must be between 0 and is %d", + BLAKE2S_OUTBYTES); + goto error; + } + self->param.inner_length = inner_size; + + /* Set key length. */ + if ((key->obj != NULL) && key->len) { + if (key->len > BLAKE2S_KEYBYTES) { + PyErr_Format(PyExc_ValueError, + "maximum key length is %d bytes", + BLAKE2S_KEYBYTES); + goto error; + } + self->param.key_length = key->len; + } + + /* Initialize hash state. */ + if (blake2s_init_param(&self->state, &self->param) < 0) { + PyErr_SetString(PyExc_RuntimeError, + "error initializing hash state"); + goto error; + } + + /* Set last node flag (must come after initialization). */ + self->state.last_node = last_node; + + /* Process key block if any. */ + if (self->param.key_length) { + uint8_t block[BLAKE2S_BLOCKBYTES]; + memset(block, 0, sizeof(block)); + memcpy(block, key->buf, key->len); + blake2s_update(&self->state, block, sizeof(block)); + secure_zero_memory(block, sizeof(block)); + } + + /* Process initial data if any. */ + if (data != NULL) { + GET_BUFFER_VIEW_OR_ERROR(data, &buf, goto error); + + if (buf.len >= HASHLIB_GIL_MINSIZE) { + Py_BEGIN_ALLOW_THREADS + blake2s_update(&self->state, buf.buf, buf.len); + Py_END_ALLOW_THREADS + } else { + blake2s_update(&self->state, buf.buf, buf.len); + } + PyBuffer_Release(&buf); + } + + return (PyObject *)self; + + error: + if (self != NULL) { + Py_DECREF(self); + } + return NULL; +} + +/*[clinic input] +_blake2s.blake2s.copy + +Return a copy of the hash object. +[clinic start generated code]*/ + +static PyObject * +_blake2s_blake2s_copy_impl(BLAKE2sObject *self) +/*[clinic end generated code: output=6c5bada404b7aed7 input=c8858e887ae4a07a]*/ +{ + BLAKE2sObject *cpy; + + if ((cpy = new_BLAKE2sObject(Py_TYPE(self))) == NULL) + return NULL; + + ENTER_HASHLIB(self); + cpy->param = self->param; + cpy->state = self->state; + LEAVE_HASHLIB(self); + return (PyObject *)cpy; +} + +/*[clinic input] +_blake2s.blake2s.update + + obj: object + / + +Update this hash object's state with the provided string. +[clinic start generated code]*/ + +static PyObject * +_blake2s_blake2s_update(BLAKE2sObject *self, PyObject *obj) +/*[clinic end generated code: output=fe8438a1d3cede87 input=47a408b9a3cc05c5]*/ +{ + Py_buffer buf; + + GET_BUFFER_VIEW_OR_ERROUT(obj, &buf); + +#ifdef WITH_THREAD + if (self->lock == NULL && buf.len >= HASHLIB_GIL_MINSIZE) + self->lock = PyThread_allocate_lock(); + + if (self->lock != NULL) { + Py_BEGIN_ALLOW_THREADS + PyThread_acquire_lock(self->lock, 1); + blake2s_update(&self->state, buf.buf, buf.len); + PyThread_release_lock(self->lock); + Py_END_ALLOW_THREADS + } else { + blake2s_update(&self->state, buf.buf, buf.len); + } +#else + blake2s_update(&self->state, buf.buf, buf.len); +#endif /* !WITH_THREAD */ + PyBuffer_Release(&buf); + + Py_INCREF(Py_None); + return Py_None; +} + +/*[clinic input] +_blake2s.blake2s.digest + +Return the digest value as a string of binary data. +[clinic start generated code]*/ + +static PyObject * +_blake2s_blake2s_digest_impl(BLAKE2sObject *self) +/*[clinic end generated code: output=80e81a48c6f79cf9 input=feb9a220135bdeba]*/ +{ + uint8_t digest[BLAKE2S_OUTBYTES]; + blake2s_state state_cpy; + + ENTER_HASHLIB(self); + state_cpy = self->state; + blake2s_final(&state_cpy, digest, self->param.digest_length); + LEAVE_HASHLIB(self); + return PyBytes_FromStringAndSize((const char *)digest, + self->param.digest_length); +} + +/*[clinic input] +_blake2s.blake2s.hexdigest + +Return the digest value as a string of hexadecimal digits. +[clinic start generated code]*/ + +static PyObject * +_blake2s_blake2s_hexdigest_impl(BLAKE2sObject *self) +/*[clinic end generated code: output=db6c5028c0a3c2e5 input=4e4877b8bd7aea91]*/ +{ + uint8_t digest[BLAKE2S_OUTBYTES]; + blake2s_state state_cpy; + + ENTER_HASHLIB(self); + state_cpy = self->state; + blake2s_final(&state_cpy, digest, self->param.digest_length); + LEAVE_HASHLIB(self); + return _Py_strhex((const char *)digest, self->param.digest_length); +} + + +static PyMethodDef py_blake2s_methods[] = { + _BLAKE2S_BLAKE2S_COPY_METHODDEF + _BLAKE2S_BLAKE2S_DIGEST_METHODDEF + _BLAKE2S_BLAKE2S_HEXDIGEST_METHODDEF + _BLAKE2S_BLAKE2S_UPDATE_METHODDEF + {NULL, NULL} +}; + + + +static PyObject * +py_blake2s_get_name(BLAKE2sObject *self, void *closure) +{ + return PyUnicode_FromString("blake2s"); +} + + + +static PyObject * +py_blake2s_get_block_size(BLAKE2sObject *self, void *closure) +{ + return PyLong_FromLong(BLAKE2S_BLOCKBYTES); +} + + + +static PyObject * +py_blake2s_get_digest_size(BLAKE2sObject *self, void *closure) +{ + return PyLong_FromLong(self->param.digest_length); +} + + +static PyGetSetDef py_blake2s_getsetters[] = { + {"name", (getter)py_blake2s_get_name, + NULL, NULL, NULL}, + {"block_size", (getter)py_blake2s_get_block_size, + NULL, NULL, NULL}, + {"digest_size", (getter)py_blake2s_get_digest_size, + NULL, NULL, NULL}, + {NULL} +}; + + +static void +py_blake2s_dealloc(PyObject *self) +{ + BLAKE2sObject *obj = (BLAKE2sObject *)self; + + /* Try not to leave state in memory. */ + secure_zero_memory(&obj->param, sizeof(obj->param)); + secure_zero_memory(&obj->state, sizeof(obj->state)); +#ifdef WITH_THREAD + if (obj->lock) { + PyThread_free_lock(obj->lock); + obj->lock = NULL; + } +#endif + PyObject_Del(self); +} + + +PyTypeObject PyBlake2_BLAKE2sType = { + PyVarObject_HEAD_INIT(NULL, 0) + "_blake2.blake2s", /* tp_name */ + sizeof(BLAKE2sObject), /* tp_size */ + 0, /* tp_itemsize */ + py_blake2s_dealloc, /* tp_dealloc */ + 0, /* tp_print */ + 0, /* tp_getattr */ + 0, /* tp_setattr */ + 0, /* tp_compare */ + 0, /* tp_repr */ + 0, /* tp_as_number */ + 0, /* tp_as_sequence */ + 0, /* tp_as_mapping */ + 0, /* tp_hash */ + 0, /* tp_call */ + 0, /* tp_str */ + 0, /* tp_getattro */ + 0, /* tp_setattro */ + 0, /* tp_as_buffer */ + Py_TPFLAGS_DEFAULT, /* tp_flags */ + py_blake2s_new__doc__, /* tp_doc */ + 0, /* tp_traverse */ + 0, /* tp_clear */ + 0, /* tp_richcompare */ + 0, /* tp_weaklistoffset */ + 0, /* tp_iter */ + 0, /* tp_iternext */ + py_blake2s_methods, /* tp_methods */ + 0, /* tp_members */ + py_blake2s_getsetters, /* tp_getset */ + 0, /* tp_base */ + 0, /* tp_dict */ + 0, /* tp_descr_get */ + 0, /* tp_descr_set */ + 0, /* tp_dictoffset */ + 0, /* tp_init */ + 0, /* tp_alloc */ + py_blake2s_new, /* tp_new */ +}; 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