安装第三方库pycryptodome
支付宝支付接口功能
蚂蚁金服开放平台=>管理中心=>上线功能需要创建应用，测试采用沙箱环境
=>沙箱环境
沙箱环境
密钥需要自己上传
生成rsa密钥介绍链接
openssl生成rsa密钥对
此处有个问题，关于rsa和rsa2的区别，猜测是签名算法不一致，还有长度限制，rsa2最少要2048位
开发文档解读
电脑网站支付api接口文档
自己写代码完成签名，不使用SDK的流程
支付宝支付代码解读
一连串的序列化的过程
自己写代码完成签名，不使用SDK的流程，这个流程的代码实现。基本上是按照这段文字的流程来的。
queto_plus函数的作用
json.dumps的作用
# -*- coding: utf-8 -*-
"""推荐的第三方pip install pycryptodome"""
__author__ = 'tomtiddler'
import json
from datetime import datetime
from base64 import encodebytes, decodebytes, b64encode, b64decode
from urllib.parse import quote_plus, urlparse, parse_qs
from urllib.request import urlopen
from Crypto.PublicKey import RSA
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
class Alipay(object):
"""
支付宝支付接口
"""
def __init__(self, appid, app_notify_url, app_private_key_path,
alipay_public_key_path, return_url, debug=False):
self.appid = appid
self.app_notify_url = app_notify_url
self.return_url = return_url
self.app_private_key_path = app_private_key_path
self.app_private_key = None
with open(self.app_private_key_path) as f:
self.app_private_key = RSA.importKey(f.read())
self.alipay_public_key_path = alipay_public_key_path
with open(self.alipay_public_key_path) as f:
self.alipay_public_key = RSA.importKey(f.read())
if debug is True:
self.__gateway = "https://openapi.alipaydev.com/gateway.do"
else:
self.__gateway = "https://openapi.alipay.com/gateway.do"
def direct_pay(self, subject, out_trade_no, total_amount, return_url=None, **kwargs):
biz_content = {
"subject": subject,
"out_trade_no": out_trade_no,
"total_amount": total_amount,
"product_code": "FAST_INSTANT_TRADE_PAY"
}
biz_content.update(kwargs)
data = self.build_body("alipay.trade.page.pay", biz_content, return_url)
return self.sign_data(data)
def build_body(self, method, biz_content, return_url=None):
data = {
"app_id": self.appid,
"method": method,
"charset": "utf-8",
"sign_type": "RSA2",
"timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
"version": "1.0",
"biz_content": biz_content
}
if return_url is not None:
data["notify_url"] = self.app_notify_url
data["return_url"] = self. return_url
return data
def sign_data(self, data):
data.pop("sign", None)
# 排序后的字符串
unsign_items = self.ordered_data(data)
unsign_string = "&".join("{0}={1}".format(k, v) for k, v in unsign_items)
sign = self.sign(unsign_string.encode("utf-8"))
quoted_string = "&".join("{0}={1}".format(k, quote_plus(v)) for k, v in unsign_items)
# 获取最终的订单信息字符串
signed_string = quoted_string + "&sign=" + quote_plus(sign)
return signed_string
def ordered_data(self, data):
complex_keys = []
for k, v in data.items():
if isinstance(v, dict):
complex_keys.append(k)
# 将字典类型的数据dump出来 没懂
for key in complex_keys:
data[key] = json.dumps(data[key], separators=(",", ":"))
return sorted([(k, v) for k, v in data.items()])
def sign(self, unsigned_string):
# 开始计算签名
key = self.app_private_key
signer = PKCS1_v1_5.new(key)
signature = signer.sign(SHA256.new(unsigned_string))
# base64编码， 转换为unicode表示并移除回车
sign = encodebytes(signature).decode("utf8").replace("\n", "")
return sign
# def _verify(self, raw_content, signature):
# # 开始计算签名
# key = self.alipay_public_key
# signer = PKCS1_v1_5.new(key)
# digest = SHA256.new()
# digest.update(raw_content.encode("utf8"))
# if signer.verify(digest, decodebytes(signature.encode("utf8"))):
# return True
# return False
#
# def verify(self, data, signature):
# if "sign_type" in data:
# sign_type = data.pop("sign_type")
# # 排序后的字符串
# unsigned_items = self.ordered_data(data)
# message = "&".join(u"{}={}".format(k, v) for k, v in unsigned_items)
# return self._verify(message, signature)
if __name__ == "__main__":
alipay = Alipay(
appid="2016091600527206",
app_notify_url="https://120.79.157.29",
app_private_key_path="/home/tomtiddler/Documents/vue_shop/mythird_website/apps/trade/keys/app_private_key.pem",
alipay_public_key_path="/home/tomtiddler/Documents/vue_shop/mythird_website/apps/trade/keys/alipay_public_key.pem",
debug=True,
return_url="https://120.79.157.29"
)
url = alipay.direct_pay(
subject="测试订单",
out_trade_no="2018090701",
total_amount=100
)
re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
print(re_url)
# 以下用于验证密钥正确性，没问题，需要再仔细检查参数
# print(alipay.sign("a=123".encode("utf-8")))