最近帮人写了一个python3对文件加密解密的脚本，项目https://github.com/Gupern/python3_crypto/ 放在github上，先记录下。
# -*- coding: utf-8 -*-
'''
author: Gupern
createdDate: 2018-3-28
lastModified: 2018-3-28
'''
import argparse
from pyDes import *
import sys
from Cryptodome.Cipher import AES, ARC4
from binascii import b2a_hex, a2b_hex, hexlify
import sys,os,hashlib,time,base64
import rc4
import random, base64
from hashlib import sha1
from Crypto.Cipher import ARC4 as rc4cipher
import rsa
import sys,os,hashlib,time,base64
class aes_prpcrypt():
def __init__(self, key):
# self.key = key
self.key = bytes(key, encoding='utf-8')
self.mode = AES.MODE_CBC
#加密函数，如果text不是16的倍数【加密文本text必须为16的倍数！】，那就补足为16的倍数
def encrypt(self, text):
print(type(text))
cryptor = AES.new(self.key, self.mode, self.key)
print(type(text))
#这里密钥key 长度必须为16（AES-128）、24（AES-192）、或32（AES-256）Bytes 长度.目前AES-128足够用
length = 16
count = len(text)
add = length - (count % length)
text = text + (bytes('\0',encoding="utf-8") * add)
self.ciphertext = cryptor.encrypt(text)
#因为AES加密时候得到的字符串不一定是ascii字符集的，输出到终端或者保存时候可能存在问题
#所以这里统一把加密后的字符串转化为16进制字符串
return b2a_hex(self.ciphertext)
#解密后，去掉补足的空格用strip() 去掉
def decrypt(self, text):
cryptor = AES.new(self.key, self.mode, self.key)
plain_text = cryptor.decrypt(a2b_hex(text))
return plain_text.rstrip(bytes('\0', encoding="utf-8"))
#rsa加密
def rsaEncrypt(data, pubkey):
#明文编码格式
content = data
#公钥加密
crypto = rsa.encrypt(content,pubkey)
return crypto
#rsa解密
def rsaDecrypt(data,pk):
#私钥解密
content = rsa.decrypt(data,pk)
con=content
return con
def des_algorithm(encrypt_or_decrypt, data, key1, key2):
'''des de/encrypt algorithm'''
k = des(key1, CBC, key2, pad=None, padmode=PAD_PKCS5)
if encrypt_or_decrypt=="encrypt":
res = k.encrypt(data)
return True, res
elif encrypt_or_decrypt=="decrypt":
res = k.decrypt(data)
return True, res
else:
print("methods is wrong")
return False, ''
def aes_algorithm(encrypt_or_decrypt, data, key1, key2):
'''des de/encrypt algorithm'''
k = aes_prpcrypt(key1)
if encrypt_or_decrypt=="encrypt":
res = k.encrypt(data)
return True, res
elif encrypt_or_decrypt=="decrypt":
res = k.decrypt(data)
return True, res
else:
print("methods is wrong")
return False, ''
def rc4_algorithm(encrypt_or_decrypt, data, key1, key2):
'''des de/encrypt algorithm'''
if encrypt_or_decrypt=="encrypt":
key = bytes(key1, encoding='utf-8')
enc = rc4cipher.new(key)
res = enc.encrypt(data)
return True, res
elif encrypt_or_decrypt=="decrypt":
key = bytes(key1, encoding='utf-8')
enc = rc4cipher.new(key)
res = enc.decrypt(data)
return True, res
else:
print("methods is wrong")
return False, ''
def rsa_algorithm(encrypt_or_decrypt, data, key1, key2):
'''rsa de/encrypt algorithm'''
if encrypt_or_decrypt=="encrypt":
#生成公钥、私钥 1024位
(pubkey, privkey) = rsa.newkeys(1024)
# print("public key is: ", pubkey)
# print("private key is: ", privkey)
with open('./public.pem','w+') as f:
f.write(pubkey.save_pkcs1().decode())
with open('./private.pem','w+') as f:
f.write(privkey.save_pkcs1().decode())
res = b''
dataLen = len(data) # 分块加密
while dataLen>0:
# print(dataLen)
dataLen -= 117
crypto = rsaEncrypt(data[:117], pubkey)
data = data[117:]
res += crypto
print(len(res))
return True, res
elif encrypt_or_decrypt=="decrypt":
dataLen = len(data)
res = b''
with open('./private.pem','r') as f:
privkey = rsa.PrivateKey.load_pkcs1(f.read().encode())
key2 = privkey
# 分组解密，公钥为1024时，加密时117位一组，解密时128位一组
while dataLen>0:
print(dataLen)
dataLen -= 128
crypto = rsaDecrypt(data[:128], key2)
data = data[128:]
res += crypto
return True, res
else:
print("methods is wrong")
return False, ''
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument("input_file_location", help="Input the file location you want to process")
parser.add_argument("encrypt_or_decrypt", help="you want to encrypt or decrypt?")
parser.add_argument("key1", help="key1, for des")
parser.add_argument("key2", help="key2, can be none")
parser.add_argument("output_file_location", help="the location you want to output")
parser.add_argument("methods", help="input the algorithm you wanna, des/aes/rc4/rsa")
args = parser.parse_args()
input_file_location = sys.argv[1]
encrypt_or_decrypt = sys.argv[2]
key1 = sys.argv[3]
key2 = sys.argv[4]
output_file_location = sys.argv[5]
methods = sys.argv[6]
data = open(input_file_location, 'rb').read()
print(type(data))
# print('data:', data, '\n')
if methods=='des':
success, res = des_algorithm(encrypt_or_decrypt, data, key1, key2)
elif methods=='aes':
success, res = aes_algorithm(encrypt_or_decrypt, data, key1, key2)
elif methods=='rc4':
success, res = rc4_algorithm(encrypt_or_decrypt, data, key1, key2)
elif methods=='rsa':
success, res = rsa_algorithm(encrypt_or_decrypt, data, key1, key2)
# print('res:', res, '\n', type(res))
# 加密时
if encrypt_or_decrypt=='encrypt':
with open(output_file_location, 'wb') as f:
f.write(res)
# 解密时
elif encrypt_or_decrypt=='decrypt':
with open(output_file_location, 'wb') as f:
f.write(res)
安装模块
pip3 install pyDes
pip3 install pycryptodome | pip3 install pycrypt
pip3 install rc4-python3
pip3 install rsa
命令demo
python cryptography.py <inputfile> <encrypt/decrypt> <key1> <key2> <outputfile> <des/aes/rc4/rsa>
des的key1需要8个字符，key2也要8个字符
python3 crytography.py ./1.jpg encrypt 12345678 12345678 ./endes.txt des
python3 crytography.py ./endes.txt decrypt 12345678 12345678 ./dedes.jpg des
aes的key1需要16个字符， 不需要key2，但是程序入口需要加，所以默认12345678即可
python3 crytography.py ./1.jpg encrypt 1234567890123456 12345678 ./enaes.txt aes
python3 crytography.py ./enaes.txt decrypt 1234567890123456 12345678 ./deaes.jpg aes
rc4 key1为密钥至少5位，key2无用，但需要输入
python3 crytography.py ./1.jpg encrypt 12345678 12345678 ./enrc4.txt rc4
python3 crytography.py ./enrc4.txt decrypt 12345678 12345678 ./derc4.jpg rc4
rsa 命令，key1和key2无用，将公密钥public.pem/private.pem放在当前目录下即可
python3 crytography.py ./1.jpg encrypt 12345678 12345678 ./enrsa.txt rsa
python3 crytography.py ./enrsa.txt decrypt 12345678 12345678 ./dersa.jpg rsa