商标app部分解密代码

//-----------------------------------
nonce 参数a(4) 

 public static String a(int i) {
        Random random = new Random();
        StringBuffer stringBuffer = new StringBuffer();
        int length = "abcdefghijklmnopqrstuvwxyz0123456789".length();
        for (int i2 = 0; i2 < i; i2++) {
            stringBuffer.append("abcdefghijklmnopqrstuvwxyz0123456789".charAt(random.nextInt(length)));
        }
        return stringBuffer.toString();
    }
//-----------------------------------

//-----------------------------------
b参数是提交的数据json  键值取出来拼接tostring
   private String b() {
        if (this.g == null || this.g.isEmpty()) {
            return "";
        }
        JsonObject jsonObject = new JsonObject();
        for (Entry entry : this.g.entrySet()) {
            jsonObject.addProperty(entry.getKey().toString(), entry.getValue().toString());
        }
        return jsonObject.toString();
    }

//-----------------------------------
signature参数

  String a2 = j.a(时间戳timespan, nonce参数, devid序列号, 提交参数取出键值拼接而成, true);
下面两个类是signature算法   j.a(...a)
public class j {
    public static String a(String str, String str2, String str3, String str4, boolean z) {
        String[] a;
        int i = 0;
        if (z) {
            a = a(str, str2, str3);
        } else {
            a = new String[]{str, str2, str3};
        }
        StringBuffer stringBuffer = new StringBuffer();
        int length = a.length;
        while (i < length) {
            stringBuffer.append(a[i]);
            i++;
        }
        return d.a(stringBuffer.toString());
    }

    private static String[] a(String... strArr) {
        Arrays.sort(strArr);
        return strArr;
    }
}
public class d {
    public static String a(String str) {
        if (l.a(str)) {
            return str;
        }
        try {
            return a(MessageDigest.getInstance("MD5").digest(str.getBytes()));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }

    private static String a(byte[] bArr) {
        if (bArr == null || bArr.length == 0) {
            return "";
        }
        StringBuffer stringBuffer = new StringBuffer();
        for (byte b : bArr) {
            int i = b & 255;
            if (i < 16) {
                stringBuffer.append("0");
            }
            stringBuffer.append(Integer.toHexString(i));
        }
        return stringBuffer.toString();
    }
}
//-----------------------------------
				httpURLConnection3.setRequestProperty("timespan", str);
                httpURLConnection3.setRequestProperty("nonce", a);
                httpURLConnection3.setRequestProperty("devid", c);
                httpURLConnection3.setRequestProperty("signature", a2);