java – 如何使用HMACSHA1和密钥创建签名以连接到Kayako API

我正在尝试使用apache commons HTTP Client连接到第三方应用程序API.我正在尝试连接的API是 http://wiki.kayako.com/display/DEV/REST+API.

API要求我传递API密钥和签名以及用于创建签名的salt.

根据API文档,这些是创建签名的步骤

>生成随机字符串以创建salt(在PHP中,您将使用mt_and()来执行此操作)
>通过使用SHA256散列盐来生成签名,并使用密钥作为密钥(在PHP中,您将使用hash_hmac()来执行此操作)
> base64编码签名(在PHP中,你将使用base64_encode()来执行此操作)
> URL编码输出(在PHP中,您将使用urlencode()来执行此操作)

更新

根据我得到的回复,我更改了一些代码并使用Kayako创建了一个模拟帐户来测试API

我正在使用以下类来生成签名

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.GeneralSecurityException;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import org.bouncycastle.util.encoders.Base64Encoder;

public class GenSign2 {
    public static void main(String[] args) throws GeneralSecurityException,IOException {
        String secretKey = "M2Y2YjkxZDEtYmNlOC1mYmI0LTkxZTgtOTNiY2RiMDhmN2E2YjExNGUwYjktNGJkYy1jZTM0LWQ1MWYtZGIwYWRlZTE0NGNh";
        String salt = "0123456789";

        String generateHmacSHA256Signature = generateHmacSHA256Signature(salt,secretKey);
        System.out.println("Signature: " + generateHmacSHA256Signature);

        String urlEncodedSign = URLEncoder.encode(generateHmacSHA256Signature,"UTF-8");

        System.out.println("Url encoded value: " + urlEncodedSign);
    }

    public static String generateHmacSHA256Signature(String data,String key)
            throws GeneralSecurityException,IOException {
        byte[] hmacData = null;

        try {
            SecretKeySpec secretKey = new SecretKeySpec(key.getBytes("UTF-8"),"HmacSHA256");
            Mac mac = Mac.getInstance("HmacSHA256");
            mac.init(secretKey);
            hmacData = mac.doFinal(data.getBytes("UTF-8"));
            ByteArrayOutputStream bout = new ByteArrayOutputStream();

            new Base64Encoder().encode(hmacData,hmacData.length,bout);
            return bout.toString("UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new GeneralSecurityException(e);
        }
    }
}

测试api如下

import java.io.IOException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

public class TestApi {

    public static void main(String[] args) throws ClientProtocolException,IOException,URISyntaxException {
        HttpClient client = new DefaultHttpClient();

        List<NameValuePair> qparams = new ArrayList<NameValuePair>();
        qparams.add(new BasicNameValuePair("apikey","f165dc40-ce3f-6864-7d5e-27a7188b2e62"));
        qparams.add(new BasicNameValuePair("salt","0123456789"));
        qparams.add(new BasicNameValuePair("signature","mbrhpXkP0LzNMNDygHAorqMx%2FDGovl%2FauMTOMB6RNMA%3D"));

        HttpPost httpget = new HttpPost(
                "http://aruntest.kayako.com/api/index.php?e=/Core/Test");

        HttpResponse response = client.execute(httpget);
        System.out.println(response.getProtocolVersion());
        System.out.println(response.getStatusLine().getStatusCode());
        System.out.println(response.getStatusLine().getReasonPhrase());
        System.out.println(response.getStatusLine().toString());
    }

}

可以使用访问演示站点
网址：http://aruntest.kayako.com/admin/
用户：admin
密码：ty386rhjzz

当我尝试连接时,它会抛出未经授权的访问异常.

解决方法

public static String generateHmacSHA256Signature(String data,String key)   throws GeneralSecurityException {
    byte[] hmacData = null;

    try {
        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes("UTF-8"),"HmacSHA256");
        Mac mac = Mac.getInstance("HmacSHA256");
        mac.init(secretKey);
        hmacData = mac.doFinal(data.getBytes("UTF-8"));
        return new BASE64Encoder().encode(hmacData);
    } catch (UnsupportedEncodingException e) {
        // TODO: handle exception
        throw new GeneralSecurityException(e);
    }
}

此调用的结果将是您的属性Signature的值

String signature = generateHmacSHA256Signature(salt,key);
qparams.add(new BasicNameValuePair("signature",signature));

生成salt / nonce的简单方法

String nonce = String.valueOf(System.currentTimeMillis());

见Example:

（编辑：安卓应用网）

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