借鉴 https://www.cnblogs.com/sammy1989/p/9583965.html

最近请求一个系统，对方要求加密。折腾了一天，使用pycryptodome库，最终代码如下：

#!/usr/bin/env python3
import json
import base64
from Crypto.PublicKey import RSA
from Crypto.Hash import MD5
from Crypto.Signature import pkcs1_15
from Crypto.Cipher import PKCS1_OAEP

class encrypt_rsa():
def __init__(self, data):
self.message = data.encode()
self.public_key = RSA.import_key(open('encrypt_public.pem').read())

# 分段加密  
def encrypt(self):  
    try:  
        cipher\_rsa = PKCS1\_OAEP.new(self.public\_key)  
        res = \[\]  
        for i in range(0, len(self.message), 117):  
            print(i)  
            enc\_tmp = cipher\_rsa.encrypt(self.message\[i:i+117\])  
            res.append(enc\_tmp)  
            print(res)  
        cipher\_text = b''.join(res)  
    except Exception as e:  
        print(e)  
    else:  
        return base64.b64encode(cipher\_text).decode()

class sign_rsa():
def __init__(self, data):
self.message = data.encode()
self.private_key = RSA.import_key(open('sign_private.pem').read())

# 签名  
def sign(self):  
    h = MD5.new(self.message)  
    signature = base64.b64encode(pkcs1\_15.new(self.private\_key).sign(h))  
    return signature.decode()

if __name__ == '__main__':

payload = {'issueCode': issueCode, 'hostGroup': hostGroup,  
           'title': title, 'Content': content,  
           'level': level, 'sourceSystem': sourceSystem}  
payload\_sign = sign\_rsa(payload).sign()  
#print(payload\_sign)  
payload\_encrypt = encrypt\_rsa(payload).encrypt()  
#print(str(payload\_encrypt))  
payload\_res = {'sign': payload\_sign, 'params': payload\_encrypt}  
print(payload\_res)