安装rsa

 python -m pip install rsa

 # -*- coding: utf-8 -*-

 import rsa

 # 先生成一对密钥，然后保存.pem格式文件，当然也可以直接使用

 (pubkey, privkey) = rsa.newkeys(1024)

 pub = pubkey.save_pkcs1()

 pubfile = open('public.pem','w+')

 pubfile.write(pub)

 pubfile.close()

 pri = privkey.save_pkcs1()

 prifile = open('private.pem','w+')

 prifile.write(pri)

 prifile.close()

 # load公钥和密钥

 message = 'lovesoo.org'

 with open('public.pem') as publickfile:

     p = publickfile.read()

     pubkey = rsa.PublicKey.load_pkcs1(p)

 with open('private.pem') as privatefile:

     p = privatefile.read()

     privkey = rsa.PrivateKey.load_pkcs1(p)

 # 用公钥加密、再用私钥解密

 crypto = rsa.encrypt(message, pubkey)

 message = rsa.decrypt(crypto, privkey)

 print message

 # sign 用私钥签名认证、再用公钥验证签名

 signature = rsa.sign(message, privkey, 'SHA-1')

 rsa.verify('lovesoo.org', signature, pubkey)