Pydes Library implements Python's DES encryption

Download and introduction Address: https://twhiteman.netfirms.com/des.html

If you need to use DES encryption in Python, you can use Pydes library encryption directly, which provides CBC and ECB two encryption methods.

1. Install under Windows

After download Pydes-x.x.x.zip and unzip, there is setup.py file, use the command setup.py--HELP can see the detailed use.

You can use the command Python setup.py install command, or you can directly copy the pydes.py in the compressed package to the local Python Lib library and start using it directly.

2. Use

Use the following parameters (copy from the address provided above):

Class initialization--------------------Pydes.des (key, [mode], [IV], [pad], [Padmode]) Pydes.triple_des (key, [mode], [ IV], [pad], [padmode]) key, Bytes containing the encryption key. 8 bytes for DES, bytes to Triple desmode, Optional argument for encryption type, can be either pydes . ECB (Electronic Code book) or PYDES.CBC (Cypher Block Chaining) IV-Optional Initial Value bytes, must be Supplie   D if using CBC mode. Length must be 8 bytes.pad-Optional argument, set the pad character (Pad_normal) to use during all Encrypt/dec RPT operations done with this instance.padmode-Optional argument, set the padding mode (pad_normal or PAD_PKCS5) t o use during all ENCRYPT/DECRPT operations do with this instance. I recommend to use PAD_PKCS5 padding, as then you never need to worry about anypadding issues, as the padding can be Remov Ed unambiguously upon Decryptingdata that is encrypted using PAD_PKCS5 Padmode.common methods--------------ENcrypt (data, [pad], [Padmode]) decrypt (data, [pad], [padmode]) data, Bytes to be Encrypted/decryptedpad, Op tional argument. Only when using Padmode of Pad_normal. For encryption, adds this characters to the end of the data block if data is not a multiple of 8 bytes. For decryption, would remove the trailing characters that match this pad character from the last 8 bytes of the Unencry pted data block.padmode, Optional argument, set the padding mode, must be one of Pad_normal or PAD_PKCS5). Defaults to Pad_normal

Example-------from pydes import *# for Python3, you'll need to use bytes, i.e.:#   data = B "Please encrypt my data" #
   
    k = des (b "descrypt", CBC, B "\0\0\0\0\0\0\0\0", Pad=none, PADMODE=PAD_PKCS5) data = "Please encrypt my data" k = des ("descry PT ", CBC," \0\0\0\0\0\0\0\0 ", Pad=none, padmode=pad_pkcs5) d = k.encrypt (data) print" Encrypted:%r "% dprint" decrypted:%r "% K.decrypt (d) Assert K.decrypt (d, padmode=pad_pkcs5) = = Dat
    

    
Here is an example of how to use CBC encryption:
   

ImportBase64 fromPydesImport*Des_key="Bhc#@*um" #KeyDes_iv ="\x22\x33\x35\x81\xbc\x38\x5a\xe7" #self-setting IV vectordefdesencrypt (str): K= des (Des_key, CBC, Des_iv, Pad=none, padmode=PAD_PKCS5) Encryptstr=k.encrypt (str)returnBase64.b64encode (ENCRYPTSTR)#turn base64 encoding back

Pydes Library implements Python's DES encryption