Crypto模块中的签名算法

因为支付宝当中需要自行实现签名，所以就用到了SHA265和RSA2，将拼接好的信息用私钥进行签名，并进行Base64编码，然后解密就用支付宝回传给用户的公钥解密就ok了，所以我就使用Crypto模块，因此就稍微学习了一下Crypto模块的使用。

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import base64
from Crypto import Random
from Crypto.Hash import SHA256
from Crypto.Signature import PKCS1_v1_5 as Signature_pkcs1_v1_5
from Crypto.Cipher import PKCS1_v1_5 as Ciper_pkcs1_v1_5
from Crypto.PublicKey import RSA


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

# private_pem = rsa.exportKey()

# public_pem = rsa.publickey().exportKey()

message = "123456"

#对信息进行签名
private_key = '''xxx'''
rsakey = RSA.import_key(private_key)
signer = Signature_pkcs1_v1_5.new(rsakey)
digest = SHA256.new()
digest.update(message.encode("utf-8"))
sign = signer.sign(digest)
signature = base64.b64encode(sign)
print(signature)

#对信息进行解密
public_key = '''xxx'''
rsakey = RSA.import_key(public_key)
verifier = Signature_pkcs1_v1_5.new(rsakey)
digest = SHA256.new()
digest.update(message.encode("utf-8"))
is_verify = verifier.verify(digest, base64.b64encode(signature))
print(is_verify)