07. PNS(Push Notification Service) 이용하기

{
	"msgVersion" : "3.0.0"
	"packageName":"com.onestore.pns",
	"productId":"0900001234",
	"messageType":"SINGLE_PAYMENT_TRANSACTION",
	"purchaseId":"SANDBOX3000000004564",
	"developerPayload":"OS_000211234",
	"purchaseTimeMillis":24431212233,
	"purchaseState":"COMPLETED",
	"price":"10000",
	"priceCurrencyCode":"KRW"
	"productName":"GOLD100(+20)"
	"paymentTypeList":[
		{
			"paymentMethod":"DCB",
			"amount":"3000"
		},
		{
			"paymentMethod":"ONESTORECASH",
			"amount":"7000"
		}
	],
	"billingKey" : "36FED4C6E4AC9E29ADAF356057DB98B5CB92126B1D52E8757701E3A261AF49CCFBFC49F5FEF6E277A7A10E9076B523D839E9D84CE9225498155C5065529E22F5",
	"isTestMdn" : true,
	"purchaseToken" : "TOKEN...",
	"environment" : "SANDBOX",
	"marketCode" : "MKT_ONE"
	"signature" "SIGNATURE..."
}

import java.security.PublicKey;
   
import org.apache.commons.codec.binary.Base64;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.node.ObjectNode;
   
   
public class SignatureVerifier {
   
    private static final String SIGN_ALGORITHM = "SHA512withRSA";
    private ObjectMapper mapper = new ObjectMapper();
   
   
    boolean verify(String rawMsg, PublicKey key) throws Exception {
        // JSON 메시지에서 signature를 추출한다.
        JsonNode root = mapper.readTree(rawMsg);
        String signature = root.get("signature").getValueAsText();
        ((ObjectNode)root).remove("signature");
          
        // 추출한 signature가 올바른 값인지 검증한다.
        Signature sign = Signature.getInstance(SIGN_ALGORITHM);
        sign.initVerify(key);
        sign.update(root.toString().getBytes("UTF-8"));
        return sign.verify(Base64.decodeBase64(signature));
    }
}

<?php
function formatPublicKey($publicKey) {
 $BEGIN= "-----BEGIN PUBLIC KEY-----";
 $END = "-----END PUBLIC KEY-----";
  
 $pem = $BEGIN . "\n";
 $pem .= chunk_split($publicKey, 64, "\n");
 $pem .= $END . "\n";
  
 return $pem;
}
  
function formatSignature($signature) {
 return base64_decode(chunk_split($signature, 64, "\n"));
}
  
// Sample message
$sampleMessage = '{"msgVersion":"2.0.0.D","purchaseId":"SANDBOX3000000004564","developerPayload":"OS_000211234","packageName":"com.onestore.pns","productId":"0900001234","messageType":"SINGLE_PAYMENT_TRANSACTION","purchaseMillis":24431212233,"purchaseState":"COMPLETED","price":20000,"productName":"한글은?GOLD100(+20)","paymentTypeList":[{"paymentMethod":"DCB","amount":3000},{"paymentMethod":"ONESTORECASH","amount":7000}],"billingKey":"36FED4C6E4AC9E29ADAF356057DB98B5CB92126B1D52E8757701E3A261AF49CCFBFC49F5FEF6E277A7A10E9076B523D839E9D84CE9225498155C5065529E22F5","isTestMdn":true,"signature":"MNxIl32ws+yYWpUr7om+jail4UQxBUXdNX5yw5PJKlqW2lurfvhiqF0p4XWa+fmyV6+Ot63w763Gnx2+7Zp2Wgl73TWru5kksBjqVJ3XqyjUHDDaF80aq0KvoQdLAHfKze34cJXKR/Qu8dPHK65PDH/Vu6MvPVRB8TvCJpkQrqg="}';
  
// Sample public key
$publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDMzpWJoK1GSOrr4juma5+sREYjdCW8/xSd9+6z6PAkUH5af97wy8ecfkLtP9LK5VskryfDlcOjfu0BgmHYntAqKT7B4KWk8jWbJ8VHUpp30H95UbcnCRFDqpEtwYzNA5gNMYKtAdbL41K8Fbum0Xqxo65pPEI4UC3MAG96O7X1WQIDAQAB";
  
  
// Parse JSON message
$jsonArr = json_decode($sampleMessage, true);
  
// Extract and remove signature
$signature = $jsonArr["signature"];
unset($jsonArr["signature"]);
$originalMessage = json_encode($jsonArr, JSON_UNESCAPED_UNICODE);
  
// Veify
$formattedKey = formatPublicKey($publicKey);
$formattedSign = formatSignature($signature);
$hash_algorithm = 'sha512';
  
$success = openssl_verify($originalMessage, $formattedSign, $formattedKey, $hash_algorithm);
if ($success == 1) {
 echo "verified";
}
else {
 echo "unverified";
}
?>

# -*- coding: utf-8 -*-
  
import json
from base64 import b64decode
from collections import OrderedDict
  
from Crypto.Hash import SHA512
from Crypto.PublicKey import RSA
from Crypto.Signature import PKCS1_v1_5
  
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
  
hash = "SHA-512"
  
  
def verify(message, signature, pub_key):
    signer = PKCS1_v1_5.new(pub_key)
    digest = SHA512.new()
    digest.update(message)
    return signer.verify(digest, signature)
  
  
jsonData = json.loads(rawMsg, encoding='utf-8', object_pairs_hook=OrderedDict)
signature = jsonData['signature']
del jsonData['signature']
originalMessage = json.dumps(jsonData, ensure_ascii=False, encoding='utf-8', separators=(',', ':'))
  
RSA.importKey(publickey).publickey()
print(verify(originalMessage, b64decode(signature), RSA.importKey(publickey).publickey()))

{
    "msgVersion":"3.0.0",
    "packageName":"com.onestore.pns",
    "eventTimeMillis":24431212233000,
    "subscriptionNotification": {
        "version": "1",
        "notificationType" : 1,
        "purchaseToken":"TOKEN",
        "productId": "com.product.id"
    },
    "environmenmt": "COMMERCIAL",
    "marketCode": "MKT_ONE"
}