TypeError: Expected instance of hashes.HashAlgorithm.
Closed this issue · 3 comments
mengesb commented
Attempted to use your python module, however The example isn't working as requested. I've also not been able to install cryptography==1.3.1f, so I tried with both 1.7 and 1.3.2, and the result below is the same. I'm not sure what's happening however I'm following the example as provided and it isn't working.
Python 2.7.12 (default, Oct 11 2016, 05:24:00)
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.38)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests, requests_chef
>>> auth = requests_chef.ChefAuth('user', '~/.chef/user.pem')
>>> print auth
ChefAuth(user)
>>> response = requests.get('https://chef.domain.com/users/user', headers={'X-Chef-Version': '12.0.2'}, auth=auth)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/site-packages/requests/api.py", line 70, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python2.7/site-packages/requests/api.py", line 56, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python2.7/site-packages/requests/sessions.py", line 474, in request
prep = self.prepare_request(req)
File "/usr/local/lib/python2.7/site-packages/requests/sessions.py", line 407, in prepare_request
hooks=merge_hooks(request.hooks, self.hooks),
File "/usr/local/lib/python2.7/site-packages/requests/models.py", line 306, in prepare
self.prepare_auth(auth, url)
File "/usr/local/lib/python2.7/site-packages/requests/models.py", line 527, in prepare_auth
r = auth(self)
File "/usr/local/lib/python2.7/site-packages/requests_chef/mixlib_auth.py", line 108, in __call__
signed = self.private_key.sign(canonical_request, b64=True)
File "/usr/local/lib/python2.7/site-packages/requests_chef/mixlib_auth.py", line 185, in sign
signer = self.private_key.signer(padder, None)
File "/usr/local/lib/python2.7/site-packages/cryptography/hazmat/backends/openssl/rsa.py", line 531, in signer
return _RSASignatureContext(self._backend, self, padding, algorithm)
File "/usr/local/lib/python2.7/site-packages/cryptography/hazmat/backends/openssl/rsa.py", line 207, in __init__
self._hash_ctx = hashes.Hash(self._algorithm, self._backend)
File "/usr/local/lib/python2.7/site-packages/cryptography/hazmat/primitives/hashes.py", line 76, in __init__
raise TypeError("Expected instance of hashes.HashAlgorithm.")
TypeError: Expected instance of hashes.HashAlgorithm.
>>> response = requests.get('https://chef.domain.com/users/user', headers={'X-Chef-Version': '12.0.2'}, auth=auth)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/site-packages/requests/api.py", line 70, in get
return request('get', url, params=params, **kwargs)
File "/usr/local/lib/python2.7/site-packages/requests/api.py", line 56, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python2.7/site-packages/requests/sessions.py", line 474, in request
prep = self.prepare_request(req)
File "/usr/local/lib/python2.7/site-packages/requests/sessions.py", line 407, in prepare_request
hooks=merge_hooks(request.hooks, self.hooks),
File "/usr/local/lib/python2.7/site-packages/requests/models.py", line 306, in prepare
self.prepare_auth(auth, url)
File "/usr/local/lib/python2.7/site-packages/requests/models.py", line 527, in prepare_auth
r = auth(self)
File "/usr/local/lib/python2.7/site-packages/requests_chef/mixlib_auth.py", line 108, in __call__
signed = self.private_key.sign(canonical_request, b64=True)
File "/usr/local/lib/python2.7/site-packages/requests_chef/mixlib_auth.py", line 185, in sign
signer = self.private_key.signer(padder, None)
File "/usr/local/lib/python2.7/site-packages/cryptography/hazmat/backends/openssl/rsa.py", line 531, in signer
return _RSASignatureContext(self._backend, self, padding, algorithm)
File "/usr/local/lib/python2.7/site-packages/cryptography/hazmat/backends/openssl/rsa.py", line 207, in __init__
self._hash_ctx = hashes.Hash(self._algorithm, self._backend)
File "/usr/local/lib/python2.7/site-packages/cryptography/hazmat/primitives/hashes.py", line 76, in __init__
raise TypeError("Expected instance of hashes.HashAlgorithm.")
TypeError: Expected instance of hashes.HashAlgorithm.stavxyz commented
Unfortunately, this library will only work with my fork of cryptography. A few weeks ago the outstanding issue in cryptography was solved, so in theory, I should be able to update this project to use a legitimate release of the cryptography library after some modifications. See pyca/cryptography#1648 for more info. And feel free to try to get this working and submit a PR ! :)
What is the error you get when installing?
$ pip install git+https://github.com/samstav/cryptography.git@rsa-bypass-hash-on-signer
Is it something like this?
error: command 'clang' failed with exit status 1
----------------------------------------
...
If so, and you are using homebrew installed python, try this:
$ env LDFLAGS="-L$(brew --prefix openssl)/lib" CFLAGS="-I$(brew --prefix openssl)/include" pip install git+https://github.com/samstav/cryptography.git@rsa-bypass-hash-on-signer
From the cryptography documentation
stavxyz commented
FWIW, the real cryptography doesn't allow this line:
i.e. passing None as the hashing algorithm. I modified cryptography to accept this pattern.