MyProxy Client Package

This a pure* Python implementation of a client to the MyProxy Credential Management Server ( It provides both a Python API and a command line interface.

  • i.e. MyProxy C client libraries are not required for this package.

It uses pyOpenSSL to make an SSL connection to the server following the messaging interface as outlined in:

The code is based on an original program myproxy_logon by Tom Uram of ANL.


These show how to retrieve a certificate bootstrapping trust in remote service.

>>> from myproxy.client import MyProxyClient
>>> myproxy_clnt = MyProxyClient(hostname="")
>>> cert, private_key = myproxy_clnt.logon(username, password, bootstrap=True)

Command line interface:

$ myproxyclient logon -s -l <username> -o creds.pem -b



  • Fix for SSL to use TLS instead of SSLv3 to address POODLE vulnerability
  • Fix for SSL verification for PyOpenSSL version 0.14 - v1.3.1 was broken because it passed the call back method to OpenSSL using verification classes’ __call__ method.

Tested on CentOS 6.4.


  • Fix to MyProxyClient.writeProxyFile and MyProxyClient.readProxyFile to correctly pick-up overridden file setting. Thanks to Nicolas Carenton, IPSL.


Unit test module with test files is in test/. See the README in that directory.


Sphinx generated documentation is available in documentation/. Run the Makefile to regenerate if required.


  • to OMII-UK for funding development of NDG Security (2007-2008)
  • Tom Uram who wrote the myproxy_logon program on which this package is based.


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