Merge #47: Replace pysha3 with pycryptodomex

b133ae2 Replace pysha3 with pycryptodomex (Timothy Redaelli)

Pull request description:

  pysha3 is not maintained anymore and it doesn't build correctly with Python 3.11 so replace it with pycryptodomex that is still maintained and working correctly with new python versions

Top commit has no ACKs.

Tree-SHA512: aa582dcfcdfa112aabf2fa9d7f83258cc33a2ab0061d144c826d59641bbad720b2dfbe9ae827229dec1d70bf7bd28c1edd5240a45f8a060d37e8f462ae1d5a85

opentimestamps/core/op.py

@@ -10,8 +10,8 @@
 # in the LICENSE file.
 
 import binascii
+import Cryptodome.Hash.keccak
 import hashlib
-import sha3
 import opentimestamps.core.serialize
 
 class MsgValueError(ValueError):
@@ -344,6 +344,6 @@ class OpKECCAK256(UnaryOp):
     DIGEST_LENGTH = 32
 
     def _do_op_call(self, msg):
-        r = sha3.keccak_256(bytes(msg)).digest()
+        r = Cryptodome.Hash.keccak.new(digest_bits=256, data=bytes(msg)).digest()
         assert len(r) == self.DIGEST_LENGTH
         return r

requirements.txt

@@ -1,3 +1,3 @@
 python-bitcoinlib>=0.9.0,<0.12.0
 GitPython>=2.0.8
-pysha3>=1.0.2
+pycryptodomex>=3.3.1

setup.py

@@ -70,7 +70,7 @@
     # requirements files see:
     # https://packaging.python.org/en/latest/requirements.html
     install_requires=['python-bitcoinlib>=0.9.0,<0.12.0',
-                      'pysha3>=1.0.2'],
+                      'pycryptodomex>=3.3.1'],
 
     # List additional groups of dependencies here (e.g. development
     # dependencies). You can install these using the following syntax,