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    "info": {
        "author": "Igor `idle sign` Starikov",
        "author_email": "idlesign@yandex.ru",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 5 - Production/Stable",
            "License :: OSI Approved :: BSD License",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.5",
            "Programming Language :: Python :: 3.6"
        ],
        "description": "srptools\n========\nhttps://github.com/idlesign/srptools\n\n.. image:: https://idlesign.github.io/lbc/py2-lbc.svg\n   :target: https://idlesign.github.io/lbc/\n   :alt: LBC Python 2\n\n----\n\n|release| |stats|  |lic| |ci| |coverage| |health|\n\n.. |release| image:: https://img.shields.io/pypi/v/srptools.svg\n    :target: https://pypi.python.org/pypi/srptools\n\n.. |stats| image:: https://img.shields.io/pypi/dm/srptools.svg\n    :target: https://pypi.python.org/pypi/srptools\n\n.. |lic| image:: https://img.shields.io/pypi/l/srptools.svg\n    :target: https://pypi.python.org/pypi/srptools\n\n.. |ci| image:: https://img.shields.io/travis/idlesign/srptools/master.svg\n    :target: https://travis-ci.org/idlesign/srptools\n\n.. |coverage| image:: https://img.shields.io/coveralls/idlesign/srptools/master.svg\n    :target: https://coveralls.io/r/idlesign/srptools\n\n.. |health| image:: https://landscape.io/github/idlesign/srptools/master/landscape.svg?style=flat\n    :target: https://landscape.io/github/idlesign/srptools/master\n\n\nDescription\n-----------\n\n*Tools to implement Secure Remote Password (SRP) authentication*\n\nSRP is a secure password-based authentication and key-exchange protocol -\na password-authenticated key agreement protocol (PAKE).\n\nThis package contains protocol implementation for Python 2 and 3.\n\nYou may import it into you applications and use its API or you may use\n``srptools`` command-line utility (CLI):\n\n\nCLI usage\n---------\n\nCommand-line utility requires ``click`` package to be installed.\n\nBasic scenario:\n\n.. code-block::\n\n    > srptools get_user_data_triplet\n    > srptools server get_private_and_public\n    > srptools client get_private_and_public\n    > srptools client get_session_data\n    > srptools server get_session_data\n\nHelp is available:\n\n.. code-block::\n\n    > srptools --help\n\n\n\nAPI usage\n---------\n\nPreliminary step. Agree on communication details:\n\n.. code-block:: python\n\n    from srptools import SRPContext\n\n    context = SRPContext('alice', 'password123')\n    username, password_verifier, salt = context.get_user_data_triplet()\n    prime = context.prime\n    gen = context.generator\n\n\nSimplified workflow:\n\n.. code-block:: python\n\n    from srptools import SRPContext, SRPServerSession, SRPClientSession\n\n    # Receive username from client and generate server public.\n    server_session = SRPServerSession(SRPContext(username, prime=prime, generator=gen), password_verifier)\n    server_public = server_session.public\n\n    # Receive server public and salt and process them.\n    client_session = SRPClientSession(SRPContext('alice', 'password123', prime=prime, generator=gen))\n    client_session.process(server_public, salt)\n    # Generate client public and session key.\n    client_public = client_session.public\n\n    # Process client public and compare session keys.\n    server_session.process(client_public, salt)\n\n    assert server_session.key == client_session.key\n\n\nExtended workflow\n\n.. code-block:: python\n\n    from srptools import SRPContext, SRPServerSession, SRPClientSession\n\n    # Receive username from client and generate server public.\n    server_session = SRPServerSession(SRPContext(username, prime=prime, generator=gen), password_verifier)\n    server_public = server_session.public\n\n    # Receive server public and salt and process them.\n    client_session = SRPClientSession(SRPContext('alice', 'password123', prime=prime, generator=gen))\n    client_session.process(server_public, salt)\n    # Generate client public and session key proof.\n    client_public = client_session.public\n    client_session_key_proof = client_session.key_proof\n\n    # Process client public and verify session key proof.\n    server_session.process(client_public, salt)\n    assert server_session.verify_proof(client_session_key_proof)\n    # Generate session key proof hash.\n    server_session_key_proof_hash = client_session.key_proof_hash\n\n    # Verify session key proof hash received from server.\n    assert client_session.verify_proof(server_session_key_proof_hash)\n\n\n\nUsage hints\n-----------\n\n* ``srptools.constants`` contains basic constants which can be used with ``SRPContext`` for server and client to agree\n  upon communication details.\n* ``.process()`` methods of session classes may raise ``SRPException`` in certain circumstances. Auth process on\n  such occasions must be stopped.\n* ``.private`` attribute of session classes may be used to restore sessions:\n    .. code-block:: python\n\n        server_private = server_session.private\n\n        # Restore session on new request.\n        server_session = SRPServerSession(context, password_verifier, private=server_private)\n\n* ``SRPContext`` is rather flexible, so you can implement some custom server/client session logic with its help.\n* Basic values are represented as hex strings but base64 encoded values are also supported:\n\n    .. code-block:: python\n\n        server_public = server_session.public_b64\n\n        # Receive server public and salt and process them.\n        client_session = SRPClientSession(SRPContext('alice', 'password123', prime=prime, generator=gen))\n        client_session.process(server_public, salt, base64=True)\n\n        # Use srptools.hex_from_b64() to represent base64 value as hex.\n        server_public_hex = hex_from_b64(server_public)\n\n\nLinks\n-----\n* RFC 2945 - The SRP Authentication and Key Exchange System\n    https://tools.ietf.org/html/rfc2945\n\n* RFC 5054 - Using the Secure Remote Password (SRP) Protocol for TLS Authentication\n    https://tools.ietf.org/html/rfc5054\n",
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        "license": "BSD 3-Clause License",
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        "name": "srptools",
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        "summary": "Tools to implement Secure Remote Password (SRP) authentication",
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