python下RSA 加密/解密，签名/验证

import rsa

# 生成密钥
(pubkey, privkey) = rsa.newkeys(1024)

# 保存密钥
with open('public.pem','w+') as f:
f.write(pubkey.save_pkcs1().decode())

with open('private.pem','w+') as f:
f.write(privkey.save_pkcs1().decode())

# 导入密钥
with open('public.pem','r') as f:
pubkey = rsa.PublicKey.load_pkcs1(f.read().encode())

with open('private.pem','r') as f:
privkey = rsa.PrivateKey.load_pkcs1(f.read().encode())

# 明文
message = 'hello'

# 公钥加密
crypto = rsa.encrypt(message.encode(), pubkey)

# 私钥解密
message = rsa.decrypt(crypto, privkey).decode()
print(message)

# 私钥签名
signature = rsa.sign(message.encode(), privkey, 'SHA-1')

# 公钥验证
rsa.verify(message.encode(), signature, pubkey)