加密解密

RSA

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import rsa
import base64
 
 
# ######### 1. 生成公钥私钥 #########
pub_key_obj, priv_key_obj = rsa.newkeys(256)
 
pub_key_str = pub_key_obj.save_pkcs1()
pub_key_code = base64.standard_b64encode(pub_key_str)
 
priv_key_str = priv_key_obj.save_pkcs1()
priv_key_code = base64.standard_b64encode(priv_key_str)
 
print(pub_key_code)
print(priv_key_code)
 
# ######### 2. 加密 #########
def encrypt(value):
    key_str = base64.standard_b64decode(pub_key_code)
    pk = rsa.PublicKey.load_pkcs1(key_str)
    val = rsa.encrypt(value.encode('utf-8'), pk)
    return val
 
 
# ######### 3. 解密 #########
def decrypt(value):
    key_str = base64.standard_b64decode(priv_key_code)
    pk = rsa.PrivateKey.load_pkcs1(key_str)
    val = rsa.decrypt(value, pk)
    return val
 
 
# ######### 基本使用 #########
if __name__ == '__main__':
    v = 'wupeiqi'
    v1 = encrypt(v)
    print(v1)
    v2 = decrypt(v1)
    print(v2)

AES(高级加密)

#3.6安装  pip3 install pycryptodome

#mac     pip3 install pycrypto

a. 事例:

############################### 加密 ##############################
 
    from Crypto.Cipher import AES
    def encrypt(message):
        key = b'dfdsdfsasdfdsdfs'                       #key必须是16的整数倍
        cipher = AES.new(key, AES.MODE_CBC, key)        #创建对象
        ----------------------------------------------
        #先转成字节,把数据拼够16字节的整数倍
        ba_data = bytearray(message,encoding='utf-8')   #把数据转成bytearray(byte的数组),bytearray只能追加数字,默认把数字转成字节
        v1 = len(ba_data)
        v2 = v1 % 16
        if v2 == 0:
            v3 = 16
        else:
            v3 = 16 - v2                                #v3是追加的长度
        for i in range(v3):
            ba_data.append(v3)                          #bytearray只能追加数字,默认把数字转成字节
        final_data = ba_data.decode('utf-8')
        ----------------------------------------------
        msg = cipher.encrypt(final_data)                #要加密的字符串，必须是16个字节或16个字节的倍数,加密后是byte格式
        return msg
 
############################### 解密 ##############################
    def decrypt(msg):
        key = b'dfdsdfsasdfdsdfs'
        cipher = AES.new(key, AES.MODE_CBC, key)
        result = cipher.decrypt(msg)                    #把加密后的字节解密成不加密的字节
        data = result[0:-result[-1]]
        return str(data,encoding='utf-8')