AK/SK认证方式

AK/SK认证是对请求消息按照一定规则生成签名信息，服务器对签名信息进行安全认证，主要作用是保证请求的可靠性，完整性。

ak表示公钥，sk表示私钥。ak与sk一一对应，不同的域使用不同的aksk.

下面提供一个简单的签名认证方式。

public class AKSKImpl {

    private static String AK="123456789";

    private static String SK="012345";

    public static void main(String[] args) throws Exception {
      String str=  sign("1234.do","11111111","11111",AK,SK);
      System.out.println(str);
    }

    private static String sign(String url,String dateTime,String numNoice,String ak,String sk) throws Exception{
        String data= ak+url +numNoice+dateTime;

        String sign=hamcsha1(data.getBytes("UTF-8"),sk.getBytes("UTF-8"));

        return sign;
    }
    public static String hamcsha1(byte[] data, byte[] key)
    {
        try {
            SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
            Mac mac = Mac.getInstance("HmacSHA1");
            mac.init(signingKey);
            return byte2hex(mac.doFinal(data));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    //二行制转字符串
    public static String byte2hex(byte[] b)
    {
        StringBuilder hs = new StringBuilder();
        String stmp;
        for (int n = 0; b!=null && n < b.length; n++) {
            stmp = Integer.toHexString(b[n] & 0XFF);
            if (stmp.length() == 1)
                hs.append('0');
            hs.append(stmp);
        }
        return hs.toString().toUpperCase();
    }
}