HG261GSDecoder for FiberHome HG261

HG261GSDecoder

public class HG261GSDecoder {

	public static void main(String[] args) {
		System.out.println("HG261GSDecoder v0.0.1(20160914) By RxRead");
		System.out.println("http://blog.zanlabs.com");
//		baseinfoSet_USERPASSWORD
		String cipherText = "66&85&55&102&79&";
		System.out.println(String.format("ciphertext=%s\ndecoder text=%s", cipherText, getPassword(cipherText)));
		
//		http://192.168.1.1/cgi-bin/baseinfoSet.cgi,baseinfoSet_TELECOMPASSWORD
		String cipherText2 = "120&105&112&105&103&115&113&101&104&113&109&114&57&56&50&49&49&54&50&49&";
		System.out.println(String.format("ciphertext=%s\ndecoder text=%s", cipherText2, getPassword(cipherText2)));
	}

	public static String getPassword(String cipherText) {
		if (cipherText == null || cipherText.length() == 0) {
			return "";
		}
		if (cipherText.charAt(cipherText.length() - 1) == '&') {
			cipherText = cipherText.substring(0, cipherText.length() - 1);
		}
		String[] orgArr = cipherText.split("&");
		StringBuffer sb = new StringBuffer();
		int count = 0;
		for (String str : orgArr) {
			int intValue = Integer.parseInt(str);
			if (intValue >= 48 && intValue <= 57) {
				intValue = intValue;
			} else {
				intValue -= 4;
			}
			String value = new String(new byte[] { (byte) (intValue) });
			sb.append(new String(value));
			count++;
		}
		return sb.toString();
	}

}

备注，烽火路由器 后台密码规则（加密版）
非加密版规则https://www.douban.com/note/517148856/