fix: secure demo file deletion

server/src/main/config/application.properties

@@ -408,8 +408,9 @@ home.pagesize = ${DEFAULT_HOME_PAGSIZE:20}
 # 启用后删除文件需要输入验证码，防止误删
 delete.captcha = ${KK_DELETE_CAPTCHA:false}
 
-# 删除文件密码，默认为123456
+# 删除文件密码，默认为false（禁用删除接口）
-delete.password = ${KK_DELETE_PASSWORD:123456}
+# 如需启用删除功能，请通过环境变量或外部配置设置独立的强密码
+delete.password = ${KK_DELETE_PASSWORD:false}
 
 # 是否删除转换后的源文件，默认为true（删除）
 # 启用可节约磁盘空间，但会丢失原始文件

server/src/main/config/test.properties

@@ -405,8 +405,8 @@ home.pagesize = ${DEFAULT_HOME_PAGSIZE:20}
 # 启用后删除文件需要输入验证码，防止误删
 delete.captcha = ${KK_DELETE_CAPTCHA:false}
 
-# 删除文件密码，默认为123456
+# 删除文件密码，默认为false（禁用删除接口）
-delete.password = ${KK_DELETE_PASSWORD:123456}
+delete.password = ${KK_DELETE_PASSWORD:false}
 
 # 是否删除转换后的源文件，默认为true（删除）
 # 启用可节约磁盘空间，但会丢失原始文件

server/src/main/java/cn/keking/config/ConfigConstants.java

@@ -31,7 +31,7 @@ public class ConfigConstants {
     // ==================================================
     public static final String DEFAULT_VALUE = "default";
     public static final String DEFAULT_SHOW_AES_KEY = "1234567890123456";
-    public static final String DEFAULT_PASSWORD = "123456";
+    public static final String DEFAULT_PASSWORD = "false";
     public static final String DEFAULT_SIZE = "500MB";
     public static final String DEFAULT_ENABLE_REFRECSHSCHEDULE = "5";
     public static final String DEFAULT_IS_JAVASCRIPT = "false";
@@ -664,7 +664,7 @@ public class ConfigConstants {
     public void setSize(String size) { setSizeValue(size); }
     public static void setSizeValue(String size) { ConfigConstants.size = size; }
 
-    @Value("${delete.password:123456}")
+    @Value("${delete.password:false}")
     public void setPassword(String password) { setPasswordValue(password); }
     public static void setPasswordValue(String password) { ConfigConstants.password = password; }
 

server/src/main/java/cn/keking/web/controller/FileController.java

@@ -11,6 +11,7 @@ import cn.keking.utils.WebUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.util.ObjectUtils;
+import org.springframework.util.StringUtils;
 import org.springframework.util.StreamUtils;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -33,6 +34,8 @@ import java.nio.file.InvalidPathException;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
 import java.util.*;
 
 import static cn.keking.utils.CaptchaUtil.CAPTCHA_CODE;
@@ -218,7 +221,7 @@ public class FileController {
         }
     }
 
-    @GetMapping("/deleteFile")
+    @PostMapping("/deleteFile")
     public ReturnResponse<Object> deleteFile(HttpServletRequest request, String fileName, String password) {
         ReturnResponse<Object> checkResult = this.deleteFileCheck(request, fileName, password);
         if (checkResult.isFailure()) {
@@ -775,11 +778,22 @@ public class FileController {
             return ReturnResponse.failure("密码 or 验证码为空，删除失败！");
         }
 
-        String expectedPassword = ConfigConstants.getDeleteCaptcha() ?
+        boolean captchaEnabled = ConfigConstants.getDeleteCaptcha();
+        String expectedPassword = captchaEnabled ?
                 WebUtils.getSessionAttr(request, CAPTCHA_CODE) :
                 ConfigConstants.getPassword();
 
-        if (!password.equalsIgnoreCase(expectedPassword)) {
+        if (!captchaEnabled && (!StringUtils.hasText(expectedPassword)
+                || "false".equalsIgnoreCase(expectedPassword))) {
+            return ReturnResponse.failure("文件删除接口已禁用，请先配置 delete.password");
+        }
+
+        if (!StringUtils.hasText(expectedPassword)) {
+            return ReturnResponse.failure("验证码已失效，请刷新后重试！");
+        }
+
+        if (!MessageDigest.isEqual(password.getBytes(StandardCharsets.UTF_8),
+                expectedPassword.getBytes(StandardCharsets.UTF_8))) {
             logger.error("删除文件【{}】失败，密码错误！", fileName);
             return ReturnResponse.failure("删除文件失败，密码错误！");
         }

server/src/main/resources/web/main/index.ftl

@@ -369,8 +369,8 @@
         $("#deleteCaptchaConfirmBtn").click(function() {
             var fileName = $("#deleteCaptchaFileName").val();
             var deleteCaptchaText = $("#deleteCaptchaText").val();
-            $.get('${baseUrl}deleteFile?fileName=' + fileName +'&password=' + deleteCaptchaText, function(data){
+            $.post('${baseUrl}deleteFile', {fileName: fileName, password: deleteCaptchaText}, function(data){
-                if ("删除文件失败，密码错误！" === data.msg) {
+                if (!data.success) {
                     alert(data.msg);
                 } else {
                     $('#table').bootstrapTable("refresh", {});
@@ -392,11 +392,16 @@
         function deleteFile(fileName, isFolder) {
             var message = isFolder ? '你确定要删除这个文件夹吗？（包含所有子文件）' : '你确定要删除这个文件吗？';
             if (window.confirm(message)) {
-                password = prompt("请输入默认密码:123456");
+                var password = prompt("请输入文件删除密码");
+                if (password === null) {
+                    return false;
+                }
                 $.ajax({
-                    url: '${baseUrl}deleteFile?fileName=' + fileName +'&password='+password,
+                    url: '${baseUrl}deleteFile',
+                    type: 'POST',
+                    data: {fileName: fileName, password: password},
                     success: function (data) {
-                        if ("删除文件失败，密码错误！" === data.msg) {
+                        if (!data.success) {
                             alert(data.msg);
                         } else {
                             $("#table").bootstrapTable("refresh", {});

server/src/test/java/cn/keking/web/controller/FileControllerDeleteSecurityTests.java

@@ -0,0 +1,113 @@
+package cn.keking.web.controller;
+
+import cn.keking.config.ConfigConstants;
+import cn.keking.model.ReturnResponse;
+import jakarta.servlet.http.HttpServletRequest;
+import org.apache.commons.codec.binary.Base64;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class FileControllerDeleteSecurityTests {
+
+    @TempDir
+    Path tempDir;
+
+    private String originalFileDir;
+    private String originalPassword;
+    private Boolean originalDeleteCaptcha;
+
+    @BeforeEach
+    void configureDemoDirectory() throws IOException {
+        originalFileDir = ConfigConstants.getFileDir();
+        originalPassword = ConfigConstants.getPassword();
+        originalDeleteCaptcha = ConfigConstants.getDeleteCaptcha();
+        Files.createDirectory(tempDir.resolve("demo"));
+        ConfigConstants.setFileDirValue(tempDir.toString());
+        ConfigConstants.setDeleteCaptchaValue(false);
+    }
+
+    @AfterEach
+    void restoreConfiguration() {
+        ConfigConstants.setFileDirValue(originalFileDir);
+        ConfigConstants.setPasswordValue(originalPassword);
+        ConfigConstants.setDeleteCaptchaValue(originalDeleteCaptcha);
+    }
+
+    @Test
+    void shouldDisableDeletionWhenNoPasswordIsConfigured() throws IOException {
+        ConfigConstants.setPasswordValue("false");
+        Path victim = Files.writeString(tempDir.resolve("demo/victim.txt"), "keep");
+        FileController controller = new FileController();
+
+        ReturnResponse<Object> response = controller.deleteFile(
+                new MockHttpServletRequest(), encodeFileName("victim.txt"), "false");
+
+        assertTrue(response.isFailure());
+        assertTrue(Files.exists(victim));
+    }
+
+    @Test
+    void shouldRequireAnExactCaseSensitivePassword() throws IOException {
+        ConfigConstants.setPasswordValue("Strong-Delete-Password");
+        Path victim = Files.writeString(tempDir.resolve("demo/victim.txt"), "delete me");
+        FileController controller = new FileController();
+
+        ReturnResponse<Object> wrongCase = controller.deleteFile(
+                new MockHttpServletRequest(), encodeFileName("victim.txt"), "strong-delete-password");
+        assertTrue(wrongCase.isFailure());
+        assertTrue(Files.exists(victim));
+
+        ReturnResponse<Object> correct = controller.deleteFile(
+                new MockHttpServletRequest(), encodeFileName("victim.txt"), "Strong-Delete-Password");
+        assertTrue(correct.isSuccess());
+        assertFalse(Files.exists(victim));
+    }
+
+    @Test
+    void shouldExposeDeletionOnlyAsPost() throws NoSuchMethodException {
+        Method method = FileController.class.getMethod(
+                "deleteFile", HttpServletRequest.class, String.class, String.class);
+
+        assertNotNull(method.getAnnotation(PostMapping.class));
+        assertNull(method.getAnnotation(GetMapping.class));
+    }
+
+    @Test
+    void shouldKeepDeletionDisabledAndCredentialsOutOfUrlsByDefault() throws IOException {
+        String properties = readResource("application.properties");
+        String template = readResource("web/main/index.ftl");
+
+        assertTrue(properties.contains("delete.password = ${KK_DELETE_PASSWORD:false}"));
+        assertTrue(template.contains("type: 'POST'"));
+        assertTrue(template.contains("$.post('${baseUrl}deleteFile'"));
+        assertFalse(template.contains("deleteFile?"));
+        assertFalse(template.contains("默认密码:123456"));
+    }
+
+    private String encodeFileName(String fileName) {
+        String value = "file://localhost/" + fileName;
+        return Base64.encodeBase64String(value.getBytes(StandardCharsets.UTF_8));
+    }
+
+    private String readResource(String path) throws IOException {
+        ClassPathResource resource = new ClassPathResource(path);
+        return new String(resource.getInputStream().readAllBytes(), StandardCharsets.UTF_8);
+    }
+}