python数据加密与解密方法

# -*- encoding: utf-8 -*-
"""
@File    : 加密与解密.py
@Time    : 2023-07-23 10:02
@Author  : simon
@Email   : [email protected]
@Software: PyCharm
"""

from hashlib import md5
import base64


# MD5加密
obj = md5()
str = "你是个小可爱"
obj.update(str.encode("utf-8"))
# obj.update("wusir".encode('utf-8'))  # 可以添加多个被加密的内容

bs = obj.hexdigest()
print("md5加密结果：{}".format(bs))

# base64加密
base_str = "我马上要进行base64加密了"
bs64 = base64.b64encode(str.encode("utf-8"))
print("bs64加密结果：{}".format(bs64))

# base64解密
s = "5L2g5piv5Liq5bCP5Y+v54ix"
bs64_jie = base64.b64decode(s.encode())
print("bs64解密结果：{}".format(bs64_jie.decode("utf-8")))

# MD5加密后再进行base64加密
obj = md5()
obj.update(str.encode("utf-8"))
bs = obj.hexdigest()
bs64 = base64.b64encode(bs.encode("utf-8"))
print("MD5加密后再进行base64加密结果：{}".format(bs64))

# url编码
import urllib.parse

# s = 'a'
s = ' 123'
ret = urllib.parse.quote(s)
print(ret)
s = urllib.parse.unquote(ret)
print(s)

params = {'name': '张三', 'age': 20, 'address': '北京市海淀区'}
query_string = urllib.parse.urlencode(params)
print(query_string)

query_string = 'name=%E5%BC%A0%E4%B8%89&age=20&address=%E5%8C%97%E4%BA%AC%E5%B8%82%E6%B5%B7%E6%B7%80%E5%8C%BA'
params = urllib.parse.parse_qs(query_string)
print(params, type(params))

# 对称加密（AES与DES） pip install pycryptodome / pip install Crypto
# #### AES之ECB模式
# ECB加密案例：
from Crypto.Cipher import AES
import base64

key = '1234567890123456'.encode()  # 秘钥
# 秘钥：必须是16位字节或者24位字节或者32位字节

text = 'alex is dsb!!!!!'
# text = 'alex is dsb'  # 需要加密的内容
# while len(text.encode('utf-8')) % 16 != 0:  # 如果text不足16位的倍数就用空格补足为16位
#     text += '\0'
text = text.encode()
print("完整text:", text)

aes = AES.new(key, AES.MODE_ECB)  # 创建一个aes对象

en_text = aes.encrypt(text)  # 加密明文
print("加密数据:::", en_text)

en_text = base64.b64encode(en_text).decode()  # 将返回的字节型数据转进行base64编码
print(en_text)  # rRPMWCaOBYahYnKUJzq65A==

# ECB解密：
from Crypto.Cipher import AES
import base64

key = '1234567890123456'.encode()  # 秘钥
# 秘钥：必须是16位字节或者24位字节或者32位字节（因为python3的字符串是unicode编码，需要 encode才可以转换成字节型数据）
model = AES.MODE_ECB  # 定义模式
aes = AES.new(key, model)  # 创建一个aes对象

text = '3NeIhJsnhzy3Ojoquz+9eg=='.encode()  # 需要解密的文本
ecrypted_base64 = base64.b64decode(text)  # base64解码成字节流
str = aes.decrypt(ecrypted_base64).decode()  # 解密

print(str)

#### AES之CBC模式

#CBC加密案例：
from Crypto.Cipher import AES
import base64

key = '1234567890123456'.encode()  # 秘钥
# 秘钥：必须是16位字节或者24位字节或者32位字节
text = 'alex is dsb!!!!!'
# text = 'alex is dsb'  # 需要加密的内容
# while len(text.encode('utf-8')) % 16 != 0:  # 如果text不足16位的倍数就用空格补足为16位
#     text += '\0'
text = text.encode()
print("完整text:", text)

iv = b'abcdabcdabcdabcd'   #偏移量--必须16字节

aes = AES.new(key, AES.MODE_CBC,iv)  # 创建一个aes对象

en_text = aes.encrypt(text)  # 加密明文
print("aes加密数据:::", en_text)

en_text = base64.b64encode(en_text).decode()  # 将返回的字节型数据转进行base64编码
print(en_text)  # rRPMWCaOBYahYnKUJzq65A==

#CBC解密：
from Crypto.Cipher import AES
import base64

key = '1234567890123456'.encode()  # 秘钥
# 秘钥：必须是16位字节或者24位字节或者32位字节（因为python3的字符串是unicode编码，需要 encode才可以转换成字节型数据）
model = AES.MODE_CBC  # 定义模式
iv = b'abcdabcdabcdabcd'
aes = AES.new(key, model, iv)  # 创建一个aes对象

text = 'J8bwyhYt1chAPAGu8N6kKA=='.encode()  # 需要解密的文本
ecrypted_base64 = base64.b64decode(text)  # base64解码成字节流
str = aes.decrypt(ecrypted_base64).decode()  # 解密

print("aes解密数据:::{}".format(str))

# 非对称加密(RSA)

# 1.创建公钥和私钥
from Crypto.PublicKey import RSA

# 生成秘钥
rsakey = RSA.generate(1024)
with open("rsa.public.pem", mode="wb") as f:
    f.write(rsakey.publickey().exportKey())

with open("rsa.private.pem", mode="wb") as f:
    f.write(rsakey.exportKey())

# 加密
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
import base64


data = "我喜欢你"
with open("rsa.public.pem", mode="r") as f:
    pk = f.read()
    rsa_pk = RSA.importKey(pk)
    rsa = PKCS1_v1_5.new(rsa_pk)

    result = rsa.encrypt(data.encode("utf-8"))
    # 处理成b64方便传输
    b64_result = base64.b64encode(result).decode("utf-8")
    print("RAS加密：" ,b64_result)

# 解密
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
import base64

data = "BkiKG8jzVGzbWOl4m8NXJEYglgtxhOB05MGmap8JSP97GzoewPBmDTs7c5iACUof3k/uJf0H88GygajVgBvkcbckJp7oO+Qj6VSUQYTOHhKN/VG2a8v+WzL34EO/S7BYoj2oOxIDAr8wDLxYxjBeXq/Be6Q1yBbnZcKaMkifhP8="

with open("rsa.private.pem", mode="r") as f:
    prikey = f.read()
    rsa_pk = RSA.importKey(prikey)
    rsa = PKCS1_v1_5.new(rsa_pk)
    result = rsa.decrypt(base64.b64decode(data), None)
    print("rsa解密数据:::", result.decode("utf-8"))