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下載及簡介地址:https://twhiteman.netfirms.com/des.html
如需要在python中使用des加密,可以直接使用pyDes庫加密,該庫提供了CBC和ECB兩種加密方式。
1、Windows下安裝
下載後pyDes-x.x.x.zip並解壓後,裡面有setup.py檔案,使用命令 setup.py --help可查看詳細使用。
你可以使用命令 python setup.py install 命令安裝,也可以直接將壓縮包內的pyDes.py拷貝到本地的python lib庫下直接開始使用
2、 使用
使用參數如下(拷貝自上述提供的地址):
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, 16 or 24 bytes for 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 supplied if using CBC mode. Length must be 8 bytes.pad -> Optional argument, set the pad character (PAD_NORMAL) to use during all encrypt/decrpt operations done with this instance.padmode -> Optional argument, set the padding mode (PAD_NORMAL or PAD_PKCS5) to use during all encrypt/decrpt operations done 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 removed unambiguously upon decryptingdata that was encrypted using PAD_PKCS5 padmode.Common methods--------------encrypt(data, [pad], [padmode])decrypt(data, [pad], [padmode])data -> Bytes to be encrypted/decryptedpad -> Optional argument. Only when using padmode of PAD_NORMAL. For encryption, adds this characters to the end of the data block when data is not a multiple of 8 bytes. For decryption, will remove the trailing characters that match this pad character from the last 8 bytes of the unencrypted 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("DESCRYPT", 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
以下是本人使用的例子,使用CBC加密的方式:
import base64from pyDes import *Des_Key = "BHC#@*UM" # KeyDes_IV = "\x22\x33\x35\x81\xBC\x38\x5A\xE7" # 自定IV向量def DesEncrypt(str): k = des(Des_Key, CBC, Des_IV, pad=None, padmode=PAD_PKCS5) EncryptStr = k.encrypt(str) return base64.b64encode(EncryptStr) #轉base64編碼返回
pyDes庫 實現python的des加密