服务器端对Google Play应用内结算购买签名的验证失败

Question

我目前正在将Google Play应用内结算集成到我的androidgame项目中，我已经设置了Node.js服务器，并计划将其发送给Google
Play购买响应的“ originalJson”和“ signature”值以进行服务器端验证。

然后我在Node.js服务器上进行了一些测试，首先这里是我购买的一件商品的“ originalJson”和“ signature”值（从客户端获取）：

   originalJson:{"orderId":"GPA.1312-8694-0319-25069","packageName":"com.shihu.sm.testin","productId":"com.shihu.sm.testin.diamond","purchaseTime":1452598011176,"purchaseState":0,"developerPayload":"{\"iabProductId\":\"com.shihu.sm.testin.diamond\",\"gOrderId\":\"2cb77de1a2a94db18b6df84f8037ea5b\",\"serverId\":\"6\",\"productId\":\"202\"}","purchaseToken":"bjoncdcebeclpklebmadidgb.AO-J1OyEbKLL0rhWQAc1hjdWyJPXHkAoHZTfZasqUuFWKWyAlnj-opiDLYILNRpnWgcblO8vV37fWf0kpeNMRZcgRT-fRxAO4P8VQPmU-TJakB-sCiRx8sUxL4nxnUBMnZdFWdpaIZDW5tP3Ck4aO57n1o66PwnjZw"}
   signature:JdfwMxprv7iMbI5YnVIWXLEAqiDhAQQva2IdfxtmhqBvLNU4Msi8sj31mnrVJfShxNmQI3zhlNUrCCaXdraFM0/y8O4PoZWYr+PFjCmlMovhG+ldeImEu7x52GLoQ7DsO8Yh4aLYmxemezFc1RjcSpq+l6Zzu9T6j3fHjLfQ060SEFapZITI/poxlFyvJX3bHhF9wGP54tL6pGjB/7fBEqTM1zHXUYeZyz+4akqV8oODlIWwMKhvN5tX/Zra9kh9hm0bnJT/1YWso3tLlT/WTK9nsP1l/lTnEXvgzq9QVSGbT/cpD7KSbR5N4i/NmPYAlCOvesW9OlRD05L8yytpBw==

然后我编写了以下代码，以使用“ RSA-SHA1”算法和“ base64”签名编码进行验证：

    var crypto = require('crypto');

    console.log('start verification');

    var public_key = "-----BEGIN PUBLIC KEY-----" + "\r\n" + 
    "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAg+VmzvTvb856ur/J+PWC" + "\r\n" +
    "gFRhLYV/chAuWzUuqlIh5gnYz1RFOYymCWAKP3wguol8YSe/72zEqAvPutBU2XVj" + "\r\n" + 
    "zx3sHT+GUInbKjgZHzxw0viPh//OfaooEvEFMz9C6J8ABwpGNQUpACmyw12ZKshP" + "\r\n" +
    "HCJ6PZV+nsWry6PEZgnYCF7w5SDP4GY2tr3Q5D0iQwoALA40KYQfsKZ6pI5L8bDT" + "\r\n" +
    "2MLTFoemg/npeARy9HYkbonPatBhWjp2flzBRcyQx7DyQ7csLvPl5AGHRT4h5RBq" + "\r\n" + 
    "RlLj+DBgNDAdwvHGyfhbTz7fPsT6xn7qifxAN+2gQsemSVmhi15zECF/k5MtTiOF" + "\r\n" +
    "owIDAQAB" + "\r\n" + 
    "-----END PUBLIC KEY-----";

    verifier= crypto.createVerify("RSA-SHA1");
    originalJson = '{"orderId":"GPA.1312-8694-0319-25069","packageName":"com.shihu.sm.testin","productId":"com.shihu.sm.testin.diamond","purchaseTime":1452598011176,"purchaseState":0,"developerPayload":"{\"iabProductId\":\"com.shihu.sm.testin.diamond\",\"gOrderId\":\"2cb77de1a2a94db18b6df84f8037ea5b\",\"serverId\":\"6\",\"productId\":\"202\"}","purchaseToken":"bjoncdcebeclpklebmadidgb.AO-J1OyEbKLL0rhWQAc1hjdWyJPXHkAoHZTfZasqUuFWKWyAlnj-opiDLYILNRpnWgcblO8vV37fWf0kpeNMRZcgRT-fRxAO4P8VQPmU-TJakB-sCiRx8sUxL4nxnUBMnZdFWdpaIZDW5tP3Ck4aO57n1o66PwnjZw"}';
    signature = 'JdfwMxprv7iMbI5YnVIWXLEAqiDhAQQva2IdfxtmhqBvLNU4Msi8sj31mnrVJfShxNmQI3zhlNUrCCaXdraFM0/y8O4PoZWYr+PFjCmlMovhG+ldeImEu7x52GLoQ7DsO8Yh4aLYmxemezFc1RjcSpq+l6Zzu9T6j3fHjLfQ060SEFapZITI/poxlFyvJX3bHhF9wGP54tL6pGjB/7fBEqTM1zHXUYeZyz+4akqV8oODlIWwMKhvN5tX/Zra9kh9hm0bnJT/1YWso3tLlT/WTK9nsP1l/lTnEXvgzq9QVSGbT/cpD7KSbR5N4i/NmPYAlCOvesW9OlRD05L8yytpBw=='

    verifier.update(originalJson);
    if(verifier.verify(public_key, signature, "base64"))
        console.log('verification succeeded');
    else
        console.log("verification failed");

中间的密钥字符串是Google控制台中base64编码的公共密钥，每64个字符除以’\ r \
n’。最初，我没有将其拆分为64个字符的块，并一直失败，并报错说无法生成pub键对象，后来我在互联网上遵循了一些示例并通过了该示例，但直到现在，我还没有尚未获得成功的验证结果。

我已经引用了更多示例，并且我认为用于验证的“ RSA-SHA1”和“ base64”设置是正确的，所以我仍然缺少或做错了什么？

谢谢

Answer 1

看来您的originalJson字符串缺少一些必要的转义。

我设法用重新添加的转义字符来验证签名：

var originalJson = '{"orderId":"GPA.1312-8694-0319-25069","packageName":"com.shihu.sm.testin","productId":"com.shihu.sm.testin.diamond","purchaseTime":1452598011176,"purchaseState":0,"developerPayload":"{\\"iabProductId\\":\\"com.shihu.sm.testin.diamond\\",\\"gOrderId\\":\\"2cb77de1a2a94db18b6df84f8037ea5b\\",\\"serverId\\":\\"6\\",\\"productId\\":\\"202\\"}","purchaseToken":"bjoncdcebeclpklebmadidgb.AO-J1OyEbKLL0rhWQAc1hjdWyJPXHkAoHZTfZasqUuFWKWyAlnj-opiDLYILNRpnWgcblO8vV37fWf0kpeNMRZcgRT-fRxAO4P8VQPmU-TJakB-sCiRx8sUxL4nxnUBMnZdFWdpaIZDW5tP3Ck4aO57n1o66PwnjZw"}';

注意\\的。否则字符串是不同的。