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        "author": "Moses Palm\u00e9r",
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        "description": "TrueLicense compatible license manager for Python\n=================================================\n\nThis package supports managing licenses one the format used by the Java package\n`TrueLicense <https://truelicense.java.net/>`_. Only the version 1 format is\nsupported.\n\nPlease see the *TrueLicense* home page for an exhaustive reference of the\nlicense format, or `Quick license format description`_ below.\n\n\nQuick license format description\n--------------------------------\n\nA license has a validity window in time, an issuer, a holder and various meta\ndata.\n\nIt is signed by the holder, and the signature can be verified using the issuer\ncertificate.\n\nThe license file is also encrypted with a key derived from a password.\n\n\nQuick library reference\n-----------------------\n\nThe main class exported by *truepy* is ``truepy.License``.\n\n- To generate a new license, use the class method ``truepy.License.issue``.\n- To load a license from a file or stream, use the class method\n  ``truepy.License.load``.\n- To save a license to a file or stream, use the method\n  ``truepy.License.store``.\n- To verify the signature of a license, use the method\n  ``truepy.License.verify``.\n- To read license information, use the ``truepy.License.license_data``\n  attribute; this is of the type ``truepy.LicenseData``.\n\nLoading and storing licenses requires only the license password; these\noperations do not perform signing and signature verification.\n\nIssuing a new license requires the private key of the issuer certificate.\n\nVerifying a license signature requires the issuer certificate.\n\n\nQuick application reference\n---------------------------\n\nPlease run the application with ``python -m truepy -h`` for more information.\n\n\nUsage\n-----\n\nThis section describes how to configure a system to use *truepy*.\n\nConfiguration includes installing *truepy*, generating an issuer certificate,\ngenerating licenses and validating licenses.\n\n\nInstallation\n~~~~~~~~~~~~\n\nTo install *truepy*, run the following command::\n\n    pip install truepy\n\n\nGenerating an issuer certificate\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nThis functionality in not included in *truepy*. The recommended tool to use is\n`OpenSSL <https://www.openssl.org/>`_. To issue a certificate and generate a\nprivate key, run the following command::\n\n    openssl req -x509 \\\n        -newkey rsa:4096 \\\n        -keyout key.pem \\\n        -out certificate.pem \\\n        -days $VALIDITY\n\nThis will prompt you for a password to protect the private key, and some other\ninformation to be included in the certificate.\n\nThe most important pieces of information are the password, which you will need\nlater, and the ``$VALIDITY``. The command line argument ``-days`` passed to\n*OpenSSL* determines how many days the certificate will be valid. Be sure not to\nset a too low value, as you will ne be able to use the certificate after this\nnumber of days have passed.\n\n\nIssuing licenses\n~~~~~~~~~~~~~~~~\n\nOnce you have a certificate and a private key, you can start issuing licenses.\nThe code below shows the minimum steps required::\n\n    from cryptography.hazmat import backends\n    from cryptography.hazmat.primitives import serialization\n\n    from truepy import LicenseData, License\n\n\n    # Load the certificate\n    with open('certificate.pem', 'rb') as f:\n        certificate = f.read()\n\n    # Load the private key\n    with open('key.pem', 'rb') as f:\n        key = serialization.load_pem_private_key(\n            f.read(),\n            password=b'MySecretPassword',\n            backend=backends.default_backend())\n\n    # Issue the license\n    license = License.issue(\n        certificate,\n        key,\n        license_data=LicenseData(\n            '2016-10-01T00:00:00',\n            '2020-10-01T00:00:00'))\n\n    # Store the license\n    with open('license.key', 'wb') as f:\n        license.store(f, b'LicensePassword')\n\nPlease note the second parameter to ``License.store``. It is a password used to\nderive an encryption key to encrypt the final license data. It is not secret, as\nit will need to be available to the application verifying the license.\n\n\nValidating licenses\n~~~~~~~~~~~~~~~~~~~\n\nTo validate a license, you will need the certificate used in the step above, as\nwell as the password used to encrypt the final license data. The code below\nshows the minimum steps required::\n\n    from truepy import License\n\n\n    # Load the certificate\n    with open('certificate.pem', 'rb') as f:\n        certificate = f.read()\n\n    # Load the license\n    with open('license.key', 'rb') as f:\n        license = License.load(f, b'LicensePassword')\n\n    # Verify the license; this will raise License.InvalidSignatureException if\n    # the signature is incorrect\n    license.verify(certificate)\n\n\nRelease Notes\n=============\n\n2.0.3 - Updated documentation\n-----------------------------\n*  Updated documentation to be compatible with *Python 3*.\n\n\n2.0.2 - Corrected handling of DSA keys\n--------------------------------------\n*  Corrected bug in reading of DSA keys.\n*  Updated documentation.\n\n\n2.0.1 - Corrected documentation\n-------------------------------\n*  Changed declared type of parameter to ``License.issue``.\n\n\n2.0 - No dependency on *OpenSSL*\n--------------------------------\n*  Changed certificate and signature verification routines to use\n   ``cryptography`` instead of ``pyOpenSSL``.\n\n   This changes all methods that take a certificate or a key as parameter.\n\n\n1.0.1 - License Data Bugfix\n---------------------------\n*  Changed ``truepy.LicenseData.information`` to ``info`` to be compatible with\n   *TrueLicense*.\n\n\n1.0 - Initial Release\n---------------------\n*  Support for basic license operations for TrueLicense version 1 licenses\n",
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        "license": "GPLv3",
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