How to use

getHmac256

method

in

com.microsoft.azure.storage.StorageCredentialsAccountAndKey

/**
 * Computes a signature for the specified string using the HMAC-SHA256 algorithm.
 * 
 * @param value
 *            The UTF-8-encoded string to sign.
 * 
 * @return A <code>String</code> that contains the HMAC-SHA256-encoded signature.
 * 
 * @throws InvalidKeyException
 *             If the key is not a valid Base64-encoded string.
 */
public static synchronized String computeHmac256(final StorageCredentials creds, final String value) throws InvalidKeyException {
  if (creds.getClass().equals(StorageCredentialsAccountAndKey.class)) {
    byte[] utf8Bytes = null;
    try {
      utf8Bytes = value.getBytes(Constants.UTF8_CHARSET);
    }
    catch (final UnsupportedEncodingException e) {
      throw new IllegalArgumentException(e);
    }
    return Base64.encode(((StorageCredentialsAccountAndKey) creds).getHmac256().doFinal(utf8Bytes));
  }
  else {
    return null;
  }
}

/**
 * Computes a signature for the specified string using the HMAC-SHA256 algorithm.
 * 
 * @param value
 *            The UTF-8-encoded string to sign.
 * 
 * @return A <code>String</code> that contains the HMAC-SHA256-encoded signature.
 * 
 * @throws InvalidKeyException
 *             If the key is not a valid Base64-encoded string.
 */
public static synchronized String computeHmac256(final StorageCredentials creds, final String value) throws InvalidKeyException {
  if (creds.getClass().equals(StorageCredentialsAccountAndKey.class)) {
    byte[] utf8Bytes = null;
    try {
      utf8Bytes = value.getBytes(Constants.UTF8_CHARSET);
    }
    catch (final UnsupportedEncodingException e) {
      throw new IllegalArgumentException(e);
    }
    return Base64.encode(((StorageCredentialsAccountAndKey) creds).getHmac256().doFinal(utf8Bytes));
  }
  else {
    return null;
  }
}