Yu1709$!%yuyu!$%wutu!5=126+

                
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      \_/     \/    @ligmakokz

Editing: SHA256.py

# -*- coding: utf-8 -*-
#
# ===================================================================
# The contents of this file are dedicated to the public domain.  To
# the extent that dedication to the public domain is not available,
# everyone is granted a worldwide, perpetual, royalty-free,
# non-exclusive license to exercise all rights associated with the
# contents of this file for any purpose whatsoever.
# No rights are reserved.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# ===================================================================

from Crypto.Util.py3compat import bord

from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
                                  VoidPointer, SmartPointer,
                                  create_string_buffer,
                                  get_raw_buffer, c_size_t,
                                  c_uint8_ptr)

_raw_sha256_lib = load_pycryptodome_raw_lib("Crypto.Hash._SHA256",
                        """
                        int SHA256_init(void **shaState);
                        int SHA256_destroy(void *shaState);
                        int SHA256_update(void *hs,
                                          const uint8_t *buf,
                                          size_t len);
                        int SHA256_digest(const void *shaState,
                                          uint8_t *digest,
                                          size_t digest_size);
                        int SHA256_copy(const void *src, void *dst);

int SHA256_pbkdf2_hmac_assist(const void *inner,
                                            const void *outer,
                                            const uint8_t *first_digest,
                                            uint8_t *final_digest,
                                            size_t iterations,
                                            size_t digest_size);
                        """)

class SHA256Hash(object):
    """A SHA-256 hash object.
    Do not instantiate directly. Use the :func:`new` function.

:ivar oid: ASN.1 Object ID
    :vartype oid: string

:ivar block_size: the size in bytes of the internal message block,
                      input to the compression function
    :vartype block_size: integer

:ivar digest_size: the size in bytes of the resulting hash
    :vartype digest_size: integer
    """

# The size of the resulting hash in bytes.
    digest_size = 32
    # The internal block size of the hash algorithm in bytes.
    block_size = 64
    # ASN.1 Object ID
    oid = "2.16.840.1.101.3.4.2.1"

def __init__(self, data=None):
        state = VoidPointer()
        result = _raw_sha256_lib.SHA256_init(state.address_of())
        if result:
            raise ValueError("Error %d while instantiating SHA256"
                             % result)
        self._state = SmartPointer(state.get(),
                                   _raw_sha256_lib.SHA256_destroy)
        if data:
            self.update(data)

def update(self, data):
        """Continue hashing of a message by consuming the next chunk of data.

Args:
            data (byte string/byte array/memoryview): The next chunk of the message being hashed.
        """

result = _raw_sha256_lib.SHA256_update(self._state.get(),
                                               c_uint8_ptr(data),
                                               c_size_t(len(data)))
        if result:
            raise ValueError("Error %d while hashing data with SHA256"
                             % result)

def digest(self):
        """Return the **binary** (non-printable) digest of the message that has been hashed so far.

:return: The hash digest, computed over the data processed so far.
                 Binary form.
        :rtype: byte string
        """

bfr = create_string_buffer(self.digest_size)
        result = _raw_sha256_lib.SHA256_digest(self._state.get(),
                                               bfr,
                                               c_size_t(self.digest_size))
        if result:
            raise ValueError("Error %d while making SHA256 digest"
                             % result)

return get_raw_buffer(bfr)

def hexdigest(self):
        """Return the **printable** digest of the message that has been hashed so far.

:return: The hash digest, computed over the data processed so far.
                 Hexadecimal encoded.
        :rtype: string
        """

return "".join(["%02x" % bord(x) for x in self.digest()])

def copy(self):
        """Return a copy ("clone") of the hash object.

The copy will have the same internal state as the original hash
        object.
        This can be used to efficiently compute the digests of strings that
        share a common initial substring.

:return: A hash object of the same type
        """

clone = SHA256Hash()
        result = _raw_sha256_lib.SHA256_copy(self._state.get(),
                                             clone._state.get())
        if result:
            raise ValueError("Error %d while copying SHA256" % result)
        return clone

def new(self, data=None):
        """Create a fresh SHA-256 hash object."""

return SHA256Hash(data)

def new(data=None):
    """Create a new hash object.

:parameter data:
        Optional. The very first chunk of the message to hash.
        It is equivalent to an early call to :meth:`SHA256Hash.update`.
    :type data: byte string/byte array/memoryview

:Return: A :class:`SHA256Hash` hash object
    """

return SHA256Hash().new(data)

# The size of the resulting hash in bytes.
digest_size = SHA256Hash.digest_size

# The internal block size of the hash algorithm in bytes.
block_size = SHA256Hash.block_size

def _pbkdf2_hmac_assist(inner, outer, first_digest, iterations):
    """Compute the expensive inner loop in PBKDF-HMAC."""

assert iterations > 0

bfr = create_string_buffer(len(first_digest));
    result = _raw_sha256_lib.SHA256_pbkdf2_hmac_assist(
                    inner._state.get(),
                    outer._state.get(),
                    first_digest,
                    bfr,
                    c_size_t(iterations),
                    c_size_t(len(first_digest)))

if result:
        raise ValueError("Error %d with PBKDF2-HMAC assist for SHA256" % result)

return get_raw_buffer(bfr)

Name	Type	Actions
__pycache__	Directory
BLAKE2b.py	File
BLAKE2b.pyi	File
BLAKE2s.py	File
BLAKE2s.pyi	File
CMAC.py	File
CMAC.pyi	File
HMAC.py	File
HMAC.pyi	File
KMAC128.py	File
KMAC128.pyi	File
KMAC256.py	File
KMAC256.pyi	File
KangarooTwelve.py	File
KangarooTwelve.pyi	File
MD2.py	File
MD2.pyi	File
MD4.py	File
MD4.pyi	File
MD5.py	File
MD5.pyi	File
Poly1305.py	File
Poly1305.pyi	File
RIPEMD.py	File
RIPEMD.pyi	File
RIPEMD160.py	File
RIPEMD160.pyi	File
SHA.py	File
SHA.pyi	File
SHA1.py	File
SHA1.pyi	File
SHA224.py	File
SHA224.pyi	File
SHA256.py	File
SHA256.pyi	File
SHA384.py	File
SHA384.pyi	File
SHA3_224.py	File
SHA3_224.pyi	File
SHA3_256.py	File
SHA3_256.pyi	File
SHA3_384.py	File
SHA3_384.pyi	File
SHA3_512.py	File
SHA3_512.pyi	File
SHA512.py	File
SHA512.pyi	File
SHAKE128.py	File
SHAKE128.pyi	File
SHAKE256.py	File
SHAKE256.pyi	File
TupleHash128.py	File
TupleHash128.pyi	File
TupleHash256.py	File
TupleHash256.pyi	File
_BLAKE2b.abi3.so	File
_BLAKE2s.abi3.so	File
_MD2.abi3.so	File
_MD4.abi3.so	File
_MD5.abi3.so	File
_RIPEMD160.abi3.so	File
_SHA1.abi3.so	File
_SHA224.abi3.so	File
_SHA256.abi3.so	File
_SHA384.abi3.so	File
_SHA512.abi3.so	File
__init__.py	File
__init__.pyi	File
_ghash_clmul.abi3.so	File
_ghash_portable.abi3.so	File
_keccak.abi3.so	File
_poly1305.abi3.so	File
cSHAKE128.py	File
cSHAKE128.pyi	File
cSHAKE256.py	File
cSHAKE256.pyi	File
keccak.py	File
keccak.pyi	File