Updated DB_Helper by adding firebase methods.

venv/Lib/site-packages/Crypto/Hash/SHA3_512.py

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+# -*- 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.
+# ===================================================================
+
+"""SHA-3/512 cryptographic hash algorithm.
+
+SHA-3/512 belongs to the SHA-3 family of cryptographic hashes, as specified
+in `FIPS 202`__.
+
+The hash function produces the 512 bit digest of a message.
+
+    >>> from Crypto.Hash import SHA3_512
+    >>>
+    >>> h_obj = SHA3_512.new()
+    >>> h_obj.update(b'Some data')
+    >>> print h_obj.hexdigest()
+
+.. __: http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf
+"""
+
+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,
+                                  expect_byte_string)
+
+from Crypto.Hash.keccak import _raw_keccak_lib
+
+class SHA3_512_Hash(object):
+    """Class that implements a SHA-3/512 hash
+    """
+
+    #: The size of the resulting hash in bytes.
+    digest_size = 64
+
+    #: ASN.1 Object ID
+    oid = "2.16.840.1.101.3.4.2.10"
+
+    def __init__(self, data, update_after_digest):
+        self._update_after_digest = update_after_digest
+        self._digest_done = False
+
+        state = VoidPointer()
+        result = _raw_keccak_lib.keccak_init(state.address_of(),
+                                             c_size_t(self.digest_size * 2),
+                                             0x06)
+        if result:
+            raise ValueError("Error %d while instantiating SHA-3/512"
+                             % result)
+        self._state = SmartPointer(state.get(),
+                                   _raw_keccak_lib.keccak_destroy)
+        if data:
+            self.update(data)
+
+    def update(self, data):
+        """Continue hashing of a message by consuming the next chunk of data.
+
+        Repeated calls are equivalent to a single call with the concatenation
+        of all the arguments. In other words:
+
+           >>> m.update(a); m.update(b)
+
+        is equivalent to:
+
+           >>> m.update(a+b)
+
+        :Parameters:
+          data : byte string
+            The next chunk of the message being hashed.
+        """
+
+        if self._digest_done and not self._update_after_digest:
+            raise TypeError("You can only call 'digest' or 'hexdigest' on this object")
+
+        expect_byte_string(data)
+        result = _raw_keccak_lib.keccak_absorb(self._state.get(),
+                                               data,
+                                               c_size_t(len(data)))
+        if result:
+            raise ValueError("Error %d while updating SHA-3/512"
+                             % result)
+        return self
+
+    def digest(self):
+        """Return the **binary** (non-printable) digest of the message that has been hashed so far.
+
+        You cannot update the hash anymore after the first call to ``digest``
+        (or ``hexdigest``).
+
+        :Return: A byte string of `digest_size` bytes. It may contain non-ASCII
+         characters, including null bytes.
+        """
+
+        self._digest_done = True
+
+        bfr = create_string_buffer(self.digest_size)
+        result = _raw_keccak_lib.keccak_digest(self._state.get(),
+                                               bfr,
+                                               c_size_t(self.digest_size))
+        if result:
+            raise ValueError("Error %d while instantiating SHA-3/512"
+                             % result)
+
+        self._digest_value = get_raw_buffer(bfr)
+        return self._digest_value
+
+    def hexdigest(self):
+        """Return the **printable** digest of the message that has been hashed so far.
+
+        This method does not change the state of the hash object.
+
+        :Return: A string of 2* `digest_size` characters. It contains only
+         hexadecimal ASCII digits.
+        """
+
+        return "".join(["%02x" % bord(x) for x in self.digest()])
+
+    def new(self):
+        return type(self)(None, self._update_after_digest)
+
+
+def new(*args, **kwargs):
+    """Return a fresh instance of the hash object.
+
+    :Keywords:
+      data : byte string
+        Optional. The very first chunk of the message to hash.
+        It is equivalent to an early call to ``update()``.
+      update_after_digest : boolean
+        Optional. By default, a hash object cannot be updated anymore after
+        the digest is computed. When this flag is ``True``, such check
+        is no longer enforced.
+
+    :Return: A `SHA3_512_Hash` object
+    """
+
+    data = kwargs.pop("data", None)
+    update_after_digest = kwargs.pop("update_after_digest", False)
+    if len(args) == 1:
+        if data:
+            raise ValueError("Initial data for hash specified twice")
+        data = args[0]
+
+    if kwargs:
+        raise TypeError("Unknown parameters: " + str(kwargs))
+
+    return SHA3_512_Hash(data, update_after_digest)
+
+#: The size of the resulting hash in bytes.
+digest_size = SHA3_512_Hash.digest_size