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| public static String encode(String key, String data) throws Exception {
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA256");
sha256_HMAC.init(secret_key);
return Hex.encodeHexString(sha256_HMAC.doFinal(data.getBytes("UTF-8")));
}
public static void main(String [] args) throws Exception {
System.out.println(encode("key", "The quick brown fox jumps over the lazy dog"));
}
void createSignature(String accessKey, String secretKey, String method, String host,
String uri, UrlParamsBuilder builder) {
StringBuilder sb = new StringBuilder(1024);
if (accessKey == null || "".equals(accessKey) || secretKey == null || "".equals(secretKey)) {
throw new MyApiException(MyApiException.KEY_MISSING,
"API key and secret key are required");
}
sb.append(method.toUpperCase()).append('\n')
.append(host.toLowerCase()).append('\n')
.append(uri).append('\n');
builder.putToUrl(accessKeyId, accessKey)
.putToUrl(signatureVersion, signatureVersionValue)
.putToUrl(signatureMethod, signatureMethodValue)
.putToUrl(timestamp, gmtNow());
sb.append(builder.buildSignature());
Mac hmacSha256;
try {
hmacSha256 = Mac.getInstance(signatureMethodValue);
SecretKeySpec secKey = new SecretKeySpec(secretKey.getBytes(StandardCharsets.UTF_8),
signatureMethodValue);
hmacSha256.init(secKey);
} catch (NoSuchAlgorithmException e) {
throw new MyApiException(MyApiException.RUNTIME_ERROR,
"[Signature] No such algorithm: " + e.getMessage());
} catch (InvalidKeyException e) {
throw new MyApiException(MyApiException.RUNTIME_ERROR,
"[Signature] Invalid key: " + e.getMessage());
}
String payload = sb.toString();
byte[] hash = hmacSha256.doFinal(payload.getBytes(StandardCharsets.UTF_8));
String actualSign = Base64.getEncoder().encodeToString(hash);
builder.putToUrl(signature, actualSign);
}
|