SignedJwtAssertionCredentials on AppEngine doesn't recognize PEM key
google-app-engine, openssl, pem, pkcs#12, pycrypto
Solution
Yeah, the error is hugely misleading. What you're doing is fine; just remove the header from the PEM file so that it begins with `-----BEGIN PRIVATE KEY-----`, or run the following command over it:
openssl pkcs8 -nocrypt -in privatekey.pem -passin pass:notasecret -topk8 -out pk.pem
Problem
SignedJwtAssertionCredentials on appengine (with pycrypto 2.6) doesn't support the PKCS12 format, therefore I'm trying to use PEM keys instead, as suggested everywhere.. this is my code: ``` f = file(os.path.join(os.path.dirname(__file__), KEY_FILE), "r") key = f.read() f.close() credentials = SignedJwtAssertionCredentials(SERVICE_ACCOUNT_EMAIL, key, scope="https://www.googleapis.com/auth/drive" http = httplib2.Http() http = credentials.authorize(http) ``` and the `KEY_FILE` is a PEM key, converted with the command: ``` openssl pkcs12 -in privatekey.p12 -nodes -nocerts > privatekey.pem ``` but I still get this error, as if it didn't recognize that's a PEM key: ``` NotImplementedError: PKCS12 format is not supported by the PyCrpto library. Try converting to a "PEM" (openssl pkcs12 -in xxxxx.p12 -nodes -nocerts > privatekey.pem) or using PyOpenSSL if native code is an option. ``` same error if I pass just the filename to the constructor (without reading the contents of the file) any idea?