Python3.7基于hashlib和Crypto实现加签验签功能(实例代码)

 import datetime import random import requests import hashlib import json import base64 from Crypto.PublicKey import RSA from Crypto.Signature import PKCS1_v1_5 from Crypto.Hash import SHA256 from Crypto.Cipher import AES

 def sign(signflag,keypath,baseRequest): #http请求body print(baseRequest) #加签标志 if not signflag: return baseRequest else: #取请求体中的业务数据 businessdata = json.dumps(baseRequest["data"]) #读取私钥（.key格式，可使用openssl或java.keytools产生） with open(keypath,'r') as rsaKeyFile: rsaKey = rsaKeyFile.read().replace("\n",'') print(rsaKey) rsaKeyBytes = base64.b64decode(rsaKey) print(rsaKeyBytes) #SHA256摘要，RSA加密 priKey = RSA.importKey(rsaKeyBytes) signer = PKCS1_v1_5.new(priKey) hash_obj = SHA256.new(business_data.encode('utf-8')) signature = base64.b64encode(signer.sign(hash_obj)) print(signature) #把签名加进请求体并返回 baseRequest['sign'] = signature.decode() print(baseRequest) return baseRequest

 def validata(signflag,cerpath,res): if not signflag: return res else: #取业务数据和签名 data = res['data'] sign = res['sign'] #此处cer已转换成pem格式，使用openssl工具 #openssl x509 -inform der -pubkey -noout -in xxxxx.cer>xxxxx.pem cert = open(cerpath).read().replace("-----BEGIN PUBLIC KEY-----\n","").replace("-----END PUBLIC KEY-----\n","").replace("\n","") print(cert) #验签逻辑同加签 pubBytes = base64.b64decode(cert) pubKey = RSA.importKey(pubBytes) signer = SHA256.new(json.dumps(data).encode("utf-8")) verifier = PKCS1_v1_5.new(pubKey) return verifier.verify(signer,base64.b64decode(sign))