gU8MVB6y

1public String computeSignature(String path, String timestamp, String keyString) throws GeneralSecurityException, UnsupportedEncodingException {
2
3        SecretKey secretKey = null;
4
5        byte[] keyBytes = keyString.getBytes();
6        secretKey = new SecretKeySpec(keyBytes, "HmacSHA512");
7
8        Mac mac = Mac.getInstance("HmacSHA512");
9
10        mac.init(secretKey);
11
12        byte[] text = encodeURL(path, timestamp).getBytes();
13
14        return new String(Base64.encodeBase64(mac.doFinal(text))).trim();
15    }
16
17    public String encodeURL(String path, String timestamp){
18        Map<String, String> m = new LinkedHashMap<>();
19        m.put("method", path);
20        m.put("tonce", timestamp);
21        String encodedURL = m.keySet().stream()
22                .map(key -> key + "=" + encodeValue(m.get(key)))
23                .collect(joining("&", "", ""));
24        return encodedURL;
25    }
26
27    public String encodeValue(String value) {
28        try {
29            return URLEncoder.encode(value, StandardCharsets.UTF_8.toString());
30        } catch (UnsupportedEncodingException e) {
31            e.printStackTrace();
32        }
33        return null;
34    }