签名验证

API 密钥验证和访问

您将使用 HTTP 授权标头传输每个请求的 API 密钥以及 SHA-512 签名哈希。签名哈希包含您的 API 密钥、共享密钥以及当前的 UNIX 时间戳。

创建您的授权标头

EPS 希望您的授权标头使用下列格式 - 记录所需的 EPS 前缀。此前缀可确保向您的请求应用了正确的授权规则。

Authorization: EAN APIKey=yourAPIKey,Signature=sha512Hash,timestamp=yourUNIXTimestamp

您的 signature 值为您的 API 密钥串联的未加盐 SHA-512 哈希 + 共享密钥 + UNIX 时间戳（以秒为单位）。

您的 timestamp 值必须为用于生成您的 signature 的相同值。如果提供了不同的时间戳值，EPS 将无法验证您的签名哈希值，并且您的请求将被拒绝。

  下面是一个完整的授权标头示例：

Authorization: EAN APIKey=dkc4wrkp7w58wx5v2jxen2kx,Signature=Mgup2Azf,timestamp=1476739212

验证您的授权标头

尝试测试请求之前，请针对 EPS 签名生成器测试您自己的代码。

注意：NTP 时钟同步

EPS 会使用网络时间协议 (NTP) 来同步内部服务器的时间。如果您也使用 NTP，则不应出现时钟同步问题。大多数现代操作系统均支持此时钟同步或类似的时间同步服务 – 请查看您的操作系统文档。系统接受早于或晚于服务器时间戳长达五分钟的时间戳，以适应合理的时钟漂移。

签名生成代码示例

PHP

$apiKey = "abcdefg";
$secret = "1a2bc3";
$timestamp = time();
$authHeader = 'Authorization: EAN APIKey=' . $apiKey . ',Signature=' . hash("sha512", $apiKey.$secret.$timestamp) . ',timestamp=' . time();

JavaScript 

var crypto = require('crypto');
var request = require('request');
var apiKey = "123";
var secret="123";
var timestamp = Math.round((new Date().getTime()/1000));
var hash = crypto.createHmac('sha256', apiKey+secret+timestamp).digest('hex');
var authHeaderValue = 'EAN APIKey=' +apiKey+ ',Signature=' + hash + ',timestamp=' + timestamp;

Java

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.Timestamp;
import java.util.Date;
String apiKey = "123";
String secret = "123";
Date date= new java.util.Date();
Long timestamp = (date.getTime() / 1000);
String signature = null;
try {
   String toBeHashed = apiKey + secret + timestamp;
   MessageDigest md = MessageDigest.getInstance("SHA-512");
   byte[] bytes = md.digest(toBeHashed.getBytes("UTF-8"));
   StringBuilder sb = new StringBuilder();
   for(int i=0; i< bytes.length ;i++){
       sb.append(Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1));
   }
   signature = sb.toString();
} catch (NoSuchAlgorithmException e) {
   e.printStackTrace();
} catch (UnsupportedEncodingException e) {
   e.printStackTrace();
}
String authHeaderValue = "EAN APIKey=" + apiKey +  ",Signature=" + signature + ",timestamp=" + timestamp;

Python

import hashlib
import datetime
apiKey = "123"
secret = "123"
timestamp = str(int(time.time()));
authHeaderValue = "EAN APIKey=" + apiKey + ",Signature=" + hashlib.sha512(apiKey+secret+timestamp).hexdigest() + ",timestamp=" + timestamp

Ruby

require 'digest'
apiKey="123"
secret="123"
timestamp = Time.now.to_i
toBeHashed = "#{apiKey}#{secret}#{timestamp}"
signature = Digest::SHA2.new(512).hexdigest(toBeHashed)
authHeaderValue = "EAN APIKey=#{apiKey},Signature=#{signature},timestamp=#{timestamp}"

C#

String apiKey = "123";
String secret = "123";
TimeSpan epochTicks = new TimeSpan(new DateTime(1970, 1, 1).Ticks);
TimeSpan unixTicks = new TimeSpan(DateTime.UtcNow.Ticks) - epochTicks;
double unixTime = (int)unixTicks.TotalSeconds;
var toBeHashed = apiKey + secret + unixTime;
var bytes = System.Text.Encoding.UTF8.GetBytes(toBeHashed);
using (var hash = System.Security.Cryptography.SHA512.Create())
{
   var hashedInputBytes = hash.ComputeHash(bytes);
   var hashedInputStringBuilder = new System.Text.StringBuilder(128);
   foreach (var b in hashedInputBytes)
       hashedInputStringBuilder.Append(b.ToString("X2"));
   var signature = hashedInputStringBuilder.ToString();
   var authHeaderValue = "EAN APIKey=" + apiKey + ",Signature=" + signature +",timestamp=" + unixTime;
}

Perl

use strict;
use Crypt::Digest::SHA512 qw(sha512_hex);
my $apiKey = '123';
my $secret = '123';
my $timestamp = time;
my $sig = sha512_hex($apiKey . $secret . $timestamp);
my $authHeaderValue = "EAN APIKey=".$apiKey.",Signature=".$sig.",timestamp=".$timestamp;
print $authHeaderValue;

保护您的共享密钥

向您提供的共享密钥对于您的请求数据至关重要 – 请将其视为密码。请勿在任何可公开访问的网站或 App 代码中包含原始值。当您获准可以整合 EPS Rapid 之后，会向您提供共享密钥和 API 密钥。