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        "author": "Mozilla Services",
        "author_email": "services-dev@mozilla.org",
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            "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)",
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        "description": "=================================================================\nhawkauthlib:  library for implementing Hawk Access Authentication\n=================================================================\n\nThis is a low-level library for implementing Hawk Access Authentication, a\nsimple HTTP request-signing scheme described in:\n\n    https://npmjs.org/package/hawk\n\nTo access resources using Hawk Access Authentication, the client must have\nobtained a set of Hawk credentials including an id and a secret key.  They use\nthese credentials to make signed requests to the server.\n\nWhen accessing a protected resource, the server will generate a 401 challenge\nresponse with the scheme \"Hawk\" as follows::\n\n    > GET /protected_resource HTTP/1.1\n    > Host: example.com\n\n    < HTTP/1.1 401 Unauthorized\n    < WWW-Authenticate: Hawk\n\nThe client will use their Hawk credentials to build a request signature and\ninclude it in the Authorization header like so::\n\n    > GET /protected_resource HTTP/1.1\n    > Host: example.com\n    > Authorization: Hawk id=\"h480djs93hd8\",\n    >                     ts=\"1336363200\",\n    >                     nonce=\"dj83hs9s\",\n    >                     mac=\"bhCQXTVyfj5cmA9uKkPFx1zeOXM=\"\n\n    < HTTP/1.1 200 OK\n    < Content-Type: text/plain\n    <\n    < For your eyes only:  secret data!\n\n\nThis library provices the low-level functions necessary to implement such\nan authentication scheme.  For Hawk Auth clients, it provides the following\nfunction:\n\n    * sign_request(req, id, key, algorithm=\"sha256\"):  sign a request using\n      Hawk Access Auth.\n\nFor Hawk Auth servers, it provides the following functions:\n\n    * get_id(req):  get the claimed Hawk Auth id from the request.\n\n    * check_signature(req, key, algorithm=\"sha256\"):  check that the request\n      was signed with the given key.\n\nThe request objects passed to these functions can be any of a variety of\ncommon object types:\n\n    * a WSGI environment dict\n    * a webob.Request object\n    * a requests.Request object\n    * a string or file-like object of request data\n\nA typical use for a client program might be to install the sign_request\nfunction as an authentication hook when using the requests library, like this::\n\n    import requests\n    import functools\n    import hawkauthlib\n\n    # Hook up sign_request() to be called on every request.\n    def auth_hook(req):\n        hawkauthlib.sign_request(req, id=\"<AUTH-ID>\", key=\"<AUTH-KEY>\")\n        return req\n    session = requests.session(hooks={\"pre_request\": auth_hook})\n\n    # Then use the session as normal, and the auth is applied transparently.\n    session.get(\"http://www.secret-data.com/get-my-data\")\n\n\nA typical use for a server program might be to verify requests using a WSGI\nmiddleware component, like this::\n\n    class HawkAuthMiddleware(object):\n\n        # ...setup code goes here...\n\n        def __call__(self, environ, start_response):\n\n            # Find the identity claimed by the request.\n            id = hawkauthlib.get_id(environ)\n\n            # Look up their secret key.\n            key = self.SECRET_KEYS[id]\n\n            # If the signature is invalid, error out.\n            if not hawkauthlib.check_signature(environ, key):\n                start_response(\"401 Unauthorized\",\n                               [(\"WWW-Authenticate\", \"Hawk\")])\n                return [\"\"]\n\n            # Otherwise continue to the main application.\n            return self.application(environ, start_response)\n\n\nThe following features of the Hawk protocol are not yet supported:\n\n  * Bewits.\n  * Timestamp adjustment.\n  * Calculating or verifying the server's response signature.\n  * Calculating or verifying payload hashes.\n\n\n2.0.0 - 2016-01-16\n==================\n\n * Py27, Py35 compatible\n\n0.1.1 - 2013-11-12\n==================\n\n * Let key be any binary string; id must still be ascii.\n\n\n0.1.0 - 2013-08-19\n==================\n\n * Initial release; this is essentially the macauthlib codebase, ported\n   over to the new Hawk auth specification.\n\n\n",
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