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    "info": {
        "author": "Eric Wong",
        "author_email": "ericwong@zju.edu.cn",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 5 - Production/Stable",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: MIT License",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.4",
            "Programming Language :: Python :: 3.5",
            "Programming Language :: Python :: 3.6",
            "Programming Language :: Python :: 3.7",
            "Topic :: Security",
            "Topic :: Security :: Cryptography",
            "Topic :: Software Development",
            "Topic :: Software Development :: Libraries",
            "Topic :: Software Development :: Libraries :: Python Modules"
        ],
        "description": "![version](https://img.shields.io/pypi/v/des.svg) ![license](https://img.shields.io/pypi/l/des.svg)\n\n# DES (Data Encryption Standard)\nA pure Python implementation for the famous DES algorithm, supporting Python 2 and 3.\n\n## Installation\nUsing `pip`:\n```bash\n$ pip install des \n```\n\nOr manually download the archive and run the command after extracting the stuff inside:\n```bash\n$ python setup.py install\n```\n\n## Usage\nFirstly, define a `DesKey` object by passing your encryption / decryption key. The key should be of length 8, 16 or 24. The algorithm will be automatically chosen for you.\nNote that the key should be written as `bytes` in *Python 3*.\n```python\nfrom des import DesKey\nkey0 = DesKey(b\"some key\")                  # for DES\nkey1 = DesKey(b\"a key for TRIPLE\")          # for 3DES, same as \"a key for TRIPLEa key fo\"\nkey2 = DesKey(b\"a 24-byte key for TRIPLE\")  # for 3DES\nkey3 = DesKey(b\"1234567812345678REAL_KEY\")  # for DES, same as \"REAL_KEY\"\n```\n\nYou may know whether a key is for *DES* or *3DES* algorithm by calling its method `is_single()` or `is_triple()`.\n```python\nkey0.is_single()  # -> True\nkey1.is_triple()  # -> True\nkey2.is_single()  # -> False\nkey3.is_triple()  # -> False\n```\n\nSecondly, encrypt messages by calling the method `encrypt()` from the `DesKey` object, or decrypt them by calling `decrypt()`.\nNote that the messages should be written as `bytes` in *Python 3*.\n```python\nkey0.encrypt(b\"any long message\")  # -> b\"\\x14\\xfa\\xc2 '\\x00{\\xa9\\xdc;\\x9dq\\xcbr\\x87Q\"\n```\n\nBy default, *ECB Mode* is used. You may enable *CBC Mode* by passing the argument `initial`, as the *Initial Value*.\nThe argument may be either a `bytes` object of length 8 or an integer using *big-endian*. \n```python\nkey0.encrypt(b\"any long message\", initial=0)        # -> b\"\\x14\\xfa\\xc2 '\\x00{\\xa9\\xb2\\xa5\\xa7\\xfb#\\x86\\xc5\\x9b\"\nkey0.encrypt(b\"any long message\", initial=b\"\\0\"*8)  # same as above\n```\n\nThe *DES* algorithm requires the message to be of any length that is a multiple of 8.\nBy default, the length of the message to encrypt / decrypt is assured by users.\nYou may choose to turn on *PKCS5 Padding Mode*(by passing the argument `padding` with a TRUTHY value), telling Python to do the padding before encryption for you.\n```python\nkey0.encrypt(b\"abc\", padding=True)  # -> b\"%\\xd1KU\\x8b_A\\xa6\"\n```\n\nWhile in decryption with *PKCS5 Padding*, the length of the message is still required to be a multiple of 8. But after decryption, Python will throw the padding characters away. \n```python\nkey0.decrypt(b\"%\\xd1KU\\x8b_A\\xa6\", padding=True)  # -> b\"abc\"\n```",
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        "license": "MIT",
        "maintainer": "",
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        "summary": "A pure Python implementation for the famous DES algorithm",
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