Python：Crypto模块RSA非对称加密

from Crypto.Cipher import PKCS1_v1_5

import base64

# rsa算法生成实例

def get_key():

rsa = RSA.generate(1024, Random.new().read)

# master的秘钥对的生成

private_pem = rsa.exportKey()

public_pem = rsa.publickey().exportKey()

return {

"public_key": public_pem.decode(),

"private_key": private_pem.decode()

}

# 生成的公钥私钥对

private_key = """-----BEGIN RSA PRIVATE KEY-----

MIICXQIBAAKBgQDfEQ82qUrto7h4BL3TsA/DFXSdM44cbeY4kPccD7gLGhaZRClz

YKIh5zYdfjBGF 0HXfMa1u9b7GNs2AjVIsx8Kx0QLnMfmtkmGWGhOXz/9IDLKJOx

0weKv61gysKItgzVKn2mbLool4R/PQBc3AjDyHw io1KpVz 3kRTaGs1fQIDAQAB

AoGAWB4kFWLA/6k6OOcemd4mC9mQ7HyuOdrMJDJX 5TWDkSrArajbTmSMrRkczgj

F71h3BQn8cVQXs695ARfUNrjTbi2Y0LjN7ScK7ExzTLdoMEFw5JsHggJZ0zBQY6w

mwOdGfqzA6tZPXgkn jqEha CD6GrwnTM1oDGJC/aKG2OmECQQDkO9IhUhFc/PSU

0zvGE6AOcqk5wlOuvMg oAFHJHJZ9XW7 X/Nx0ZoVDFq/cZQj 46t fiwUwhdW7l

IfCvNGKFAkEA jRQmWGKrbf1ns4S0SezJvysd5O6otRGJXr Ex2uDhc39ZTeUsyg

kjrLhp8STLMOmql 8g5fghct17EuCX1EmQJBAJz9BNnEkIrst/OSpH/nyeWGOx6u

q077LaXd 2MLD9kO/O/Se3V5B9YFa4STkJCjoBMloswXd51gIGpdgSeSmd0CQQCL

PrwwcGmWfo ynqs4PajlpK9zKQMwhYS4bTejedwZOXDKOtx0Ji i0hfcxwCPMQOK

rZPZsIgUxUOdC508aLvZAkBDkHxunCzDm0w4DdTUN7S9YSpVvQEjK/xUQiWaKV12

8QgskhU2DNdYK2NxifnWrKtx3uQmqMxX5aLuJZ4493yr

-----END RSA PRIVATE KEY-----"""

public_key = """-----BEGIN PUBLIC KEY-----

MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDfEQ82qUrto7h4BL3TsA/DFXSd

M44cbeY4kPccD7gLGhaZRClzYKIh5zYdfjBGF 0HXfMa1u9b7GNs2AjVIsx8Kx0Q

LnMfmtkmGWGhOXz/9IDLKJOx0weKv61gysKItgzVKn2mbLool4R/PQBc3AjDyHw

io1KpVz 3kRTaGs1fQIDAQAB

-----END PUBLIC KEY-----

"""

# 公钥加密

def rsa_encode(message, public_key):

rsakey = RSA.importKey(public_key) # 导入读取到的公钥

cipher = PKCS1_v1_5.new(rsakey) # 生成对象

# 通过生成的对象加密message明文，注意，在Python3中加密的数据必须是bytes类型的数据，不能是str类型的数据

cipher_text = base64.b64encode(

cipher.encrypt(message.encode(encoding="utf-8")))

# 公钥每次加密的结果不一样跟对数据的padding（填充）有关

return cipher_text.decode()

# 公钥解密

def rsa_decode(cipher_text, private_key):

rsakey = RSA.importKey(private_key) # 导入读取到的私钥

cipher = PKCS1_v1_5.new(rsakey) # 生成对象

# 将密文解密成明文，返回的是一个bytes类型数据，需要自己转换成str

text = cipher.decrypt(base64.b64decode(cipher_text), "ERROR")

return text.decode()

if __name__ == '__main__':

message = "Hello world！"

cipher = rsa_encode(message, public_key)

print(cipher)

# 输出是一行，天长了，折行显示

# vyuQHYhjYrPZK6pJMbbcjb1Q7JTLyRDPIoV7z6OkMQsuBNk0 C

# tb3dzo0EvjUhaSOZnE9LjODgEqeTR7I459cDp8izmb970BnKj74

# 6SBtGunK24nudW86ek0JXdYsF5T/IPaphU8d56rdjW wZv7OfSL

# m2HgXLXCI6NbJuJXhg=

msg = rsa_decode(cipher, private_key)

print(msg)

# Hello world！