{"id":170,"date":"2025-08-25T13:40:30","date_gmt":"2025-08-25T05:40:30","guid":{"rendered":"https:\/\/www.ychit.top\/?p=170"},"modified":"2025-09-04T14:52:48","modified_gmt":"2025-09-04T06:52:48","slug":"%e8%af%b7%e8%a7%a3%e9%87%8ajava%e4%b8%ad%e7%9a%84%e5%ae%89%e5%85%a8%e7%ae%a1%e7%90%86%e5%99%a8%ef%bc%88security-manager%ef%bc%89%ef%bc%8c%e5%ae%83%e6%9c%89%e4%bb%80%e4%b9%88%e4%bd%9c%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.ychit.top\/?p=170","title":{"rendered":"\u8bf7\u89e3\u91caJava\u4e2d\u7684\u5b89\u5168\u7ba1\u7406\u5668\uff08Security Manager\uff09\uff0c\u5b83\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f\u5982\u4f55\u914d\u7f6e\u548c\u4f7f\u7528\u5b89\u5168\u7ba1\u7406\u5668\uff1f"},"content":{"rendered":"\n<p>Java\u4e2d\u7684\u5b89\u5168\u7ba1\u7406\u5668\uff08Security Manager\uff09\u662f\u4e00\u4e2a\u6838\u5fc3\u5b89\u5168\u7ec4\u4ef6\uff0c\u7528\u4e8e\u63a7\u5236Java\u7a0b\u5e8f\u7684\u7cfb\u7edf\u8d44\u6e90\u8bbf\u95ee\u6743\u9650\uff0c\u786e\u4fdd\u4ee3\u7801\u5728\u53d7\u4fe1\u4efb\u7684\u73af\u5883\u4e2d\u8fd0\u884c\u3002\u4ee5\u4e0b\u662f\u5176\u4f5c\u7528\u3001\u914d\u7f6e\u548c\u4f7f\u7528\u65b9\u6cd5\u7684\u8be6\u7ec6\u8bf4\u660e\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. \u5b89\u5168\u7ba1\u7406\u5668\u7684\u4f5c\u7528<\/strong><\/h3>\n\n\n\n<p>\u5b89\u5168\u7ba1\u7406\u5668\u901a\u8fc7<strong>\u6c99\u7bb1\u673a\u5236<\/strong>\u9650\u5236\u7a0b\u5e8f\u7684\u884c\u4e3a\uff0c\u4e3b\u8981\u63a7\u5236\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6587\u4ef6\u8bbf\u95ee<\/strong>\uff1a\u8bfb\u5199\u6587\u4ef6\u3001\u521b\u5efa\u76ee\u5f55\u7b49\u3002<\/li>\n\n\n\n<li><strong>\u7f51\u7edc\u8bbf\u95ee<\/strong>\uff1a\u8fde\u63a5\u8fdc\u7a0b\u670d\u52a1\u5668\u3001\u76d1\u542c\u7aef\u53e3\u7b49\u3002<\/li>\n\n\n\n<li><strong>\u7cfb\u7edf\u5c5e\u6027<\/strong>\uff1a\u8bfb\u53d6\u6216\u4fee\u6539\u7cfb\u7edf\u5c5e\u6027\uff08\u5982<code>java.home<\/code>\uff09\u3002<\/li>\n\n\n\n<li><strong>\u8fd0\u884c\u65f6\u64cd\u4f5c<\/strong>\uff1a\u6267\u884c\u5916\u90e8\u8fdb\u7a0b\uff08\u5982<code>Runtime.getRuntime().exec()<\/code>\uff09\u3001\u52a0\u8f7d\u672c\u5730\u5e93\uff08\u5982<code>System.loadLibrary()<\/code>\uff09\u3002<\/li>\n\n\n\n<li><strong>\u53cd\u5c04\u6743\u9650<\/strong>\uff1a\u901a\u8fc7\u53cd\u5c04\u8bbf\u95ee\u7c7b\u3001\u65b9\u6cd5\u6216\u5b57\u6bb5\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u5178\u578b\u5e94\u7528\u573a\u666f<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Applet\u5b89\u5168<\/strong>\uff1a\u65e9\u671f\u6d4f\u89c8\u5668\u4e2d\u7684Java Applet\u5fc5\u987b\u901a\u8fc7\u5b89\u5168\u7ba1\u7406\u5668\u9650\u5236\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li><strong>Web\u5e94\u7528\u670d\u52a1\u5668<\/strong>\uff1a\u9650\u5236\u7b2c\u4e09\u65b9\u63d2\u4ef6\u6216\u811a\u672c\u7684\u6743\u9650\u3002<\/li>\n\n\n\n<li><strong>\u6c99\u7bb1\u73af\u5883<\/strong>\uff1a\u8fd0\u884c\u4e0d\u53ef\u4fe1\u4ee3\u7801\uff08\u5982\u7528\u6237\u4e0a\u4f20\u7684\u811a\u672c\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. \u914d\u7f6e\u5b89\u5168\u7ba1\u7406\u5668<\/strong><\/h3>\n\n\n\n<p>\u5b89\u5168\u7ba1\u7406\u5668\u901a\u8fc7**\u5b89\u5168\u7b56\u7565\u6587\u4ef6\uff08Policy File\uff09**\u5b9a\u4e49\u6743\u9650\u89c4\u5219\u3002\u914d\u7f6e\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2.1 \u521b\u5efa\u7b56\u7565\u6587\u4ef6<\/strong><\/h4>\n\n\n\n<p>\u7b56\u7565\u6587\u4ef6\u662f\u6587\u672c\u6587\u4ef6\uff0c\u5b9a\u4e49\u5141\u8bb8\u7684\u6743\u9650\u3002\u4f8b\u5982\uff0c\u521b\u5efa<code>my.policy<\/code>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5141\u8bb8\u8bfb\u53d6\u7279\u5b9a\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6\ngrant {\n    permission java.io.FilePermission \"\/path\/to\/allowed\/files\/*\", \"read\";\n};\n\n\/\/ \u5141\u8bb8\u8bbf\u95ee\u7279\u5b9a\u57df\u540d\ngrant {\n    permission java.net.SocketPermission \"example.com:80\", \"connect\";\n};\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2.2 \u542f\u7528\u5b89\u5168\u7ba1\u7406\u5668<\/strong><\/h4>\n\n\n\n<p>\u542f\u52a8Java\u7a0b\u5e8f\u65f6\uff0c\u901a\u8fc7\u4ee5\u4e0b\u53c2\u6570\u542f\u7528\u5b89\u5168\u7ba1\u7406\u5668\u5e76\u6307\u5b9a\u7b56\u7565\u6587\u4ef6\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>java -Djava.security.manager -Djava.security.policy=my.policy MainClass\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2.3 \u52a8\u6001\u8bbe\u7f6e\uff08\u4ee3\u7801\u4e2d\u914d\u7f6e\uff09<\/strong><\/h4>\n\n\n\n<p>\u4e5f\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u52a8\u6001\u8bbe\u7f6e\u5b89\u5168\u7ba1\u7406\u5668\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public static void main(String&#91;] args) {\n    \/\/ \u8bbe\u7f6e\u7b56\u7565\u6587\u4ef6\u8def\u5f84\n    System.setProperty(\"java.security.policy\", \"my.policy\");\n    \/\/ \u542f\u7528\u5b89\u5168\u7ba1\u7406\u5668\n    System.setSecurityManager(new SecurityManager());\n    \/\/ \u7a0b\u5e8f\u903b\u8f91\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. \u6743\u9650\u5b9a\u4e49\u4e0e\u7b56\u7565\u8bed\u6cd5<\/strong><\/h3>\n\n\n\n<p>\u7b56\u7565\u6587\u4ef6\u4f7f\u7528<code>grant<\/code>\u8bed\u53e5\u5b9a\u4e49\u6743\u9650\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>grant &#91;signedBy \"signer\",] &#91;codeBase \"URL\"] {\n    permission PermissionClass \"target\", \"actions\";\n    permission PermissionClass \"target\", \"actions\";\n    \/\/ \u591a\u4e2a\u6743\u9650...\n};\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u5e38\u89c1\u6743\u9650\u7c7b<\/strong>\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>java.io.FilePermission<\/code>\uff1a\u6587\u4ef6\u8bbf\u95ee\u6743\u9650\u3002<\/li>\n\n\n\n<li><code>java.net.SocketPermission<\/code>\uff1a\u7f51\u7edc\u8bbf\u95ee\u6743\u9650\u3002<\/li>\n\n\n\n<li><code>java.util.PropertyPermission<\/code>\uff1a\u7cfb\u7edf\u5c5e\u6027\u6743\u9650\u3002<\/li>\n\n\n\n<li><code>java.lang.RuntimePermission<\/code>\uff1a\u8fd0\u884c\u65f6\u64cd\u4f5c\u6743\u9650\u3002<\/li>\n\n\n\n<li><code>java.lang.reflect.ReflectPermission<\/code>\uff1a\u53cd\u5c04\u6743\u9650\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\u793a\u4f8b<\/strong>\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5141\u8bb8\u8bfb\u53d6\u6240\u6709\u6587\u4ef6\uff0c\u4f46\u53ea\u5141\u8bb8\u5199\u5165\/tmp\u76ee\u5f55\ngrant {\n    permission java.io.FilePermission \"\/-\", \"read\";\n    permission java.io.FilePermission \"\/tmp\/-\", \"read,write,delete\";\n};\n\n\/\/ \u5141\u8bb8\u6240\u6709\u7f51\u7edc\u8fde\u63a5\uff0c\u4f46\u7981\u6b62\u76d1\u542c\u672c\u5730\u7aef\u53e3\ngrant {\n    permission java.net.SocketPermission \"*:1-65535\", \"connect,resolve\";\n    permission java.net.SocketPermission \"localhost:1-65535\", \"accept\", \"deny\";\n};\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. \u81ea\u5b9a\u4e49\u5b89\u5168\u7ba1\u7406\u5668<\/strong><\/h3>\n\n\n\n<p>\u4f60\u53ef\u4ee5\u7ee7\u627f<code>SecurityManager<\/code>\u7c7b\uff0c\u91cd\u5199\u5173\u952e\u65b9\u6cd5\u6765\u81ea\u5b9a\u4e49\u5b89\u5168\u68c0\u67e5\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class CustomSecurityManager extends SecurityManager {\n    @Override\n    public void checkRead(String file) {\n        \/\/ \u81ea\u5b9a\u4e49\u6587\u4ef6\u8bfb\u53d6\u68c0\u67e5\u903b\u8f91\n        if (file.startsWith(\"\/sensitive\/\")) {\n            throw new SecurityException(\"Access denied to sensitive files\");\n        }\n        super.checkRead(file);\n    }\n\n    @Override\n    public void checkConnect(String host, int port) {\n        \/\/ \u81ea\u5b9a\u4e49\u7f51\u7edc\u8fde\u63a5\u68c0\u67e5\u903b\u8f91\n        if (host.equals(\"blocked-site.com\")) {\n            throw new SecurityException(\"Connection to blocked site\");\n        }\n        super.checkConnect(host, port);\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>\u542f\u7528\u81ea\u5b9a\u4e49\u5b89\u5168\u7ba1\u7406\u5668\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>System.setSecurityManager(new CustomSecurityManager());\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. \u6ce8\u610f\u4e8b\u9879<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Java 17+\u7684\u53d8\u5316<\/strong>\uff1aJava 17\u53ca\u66f4\u9ad8\u7248\u672c\u9ed8\u8ba4\u7981\u7528\u5b89\u5168\u7ba1\u7406\u5668\uff0c\u4e14\u90e8\u5206\u5b89\u5168\u76f8\u5173API\u5df2\u88ab\u6807\u8bb0\u4e3a** deprecated**\u3002\u65b0\u5e94\u7528\u5efa\u8bae\u4f7f\u7528\u66f4\u73b0\u4ee3\u7684\u5b89\u5168\u673a\u5236\uff08\u5982\u6a21\u5757\u7cfb\u7edf\u3001Jigsaw\uff09\u3002<\/li>\n\n\n\n<li><strong>\u6027\u80fd\u5f00\u9500<\/strong>\uff1a\u5b89\u5168\u7ba1\u7406\u5668\u4f1a\u589e\u52a0\u8fd0\u884c\u65f6\u68c0\u67e5\uff0c\u53ef\u80fd\u5f71\u54cd\u6027\u80fd\u3002<\/li>\n\n\n\n<li><strong>\u7ef4\u62a4\u590d\u6742\u5ea6<\/strong>\uff1a\u7b56\u7565\u6587\u4ef6\u9700\u8981\u4ed4\u7ec6\u7ef4\u62a4\uff0c\u907f\u514d\u6743\u9650\u8fc7\u677e\u6216\u8fc7\u4e25\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u603b\u7ed3<\/strong><\/h3>\n\n\n\n<p>\u5b89\u5168\u7ba1\u7406\u5668\u662fJava\u7684\u4f20\u7edf\u5b89\u5168\u673a\u5236\uff0c\u901a\u8fc7\u7b56\u7565\u6587\u4ef6\u548c\u81ea\u5b9a\u4e49\u68c0\u67e5\u9650\u5236\u7a0b\u5e8f\u7684\u7cfb\u7edf\u8d44\u6e90\u8bbf\u95ee\u3002\u867d\u7136\u5728\u65b0\u7248\u672cJava\u4e2d\u9010\u6e10\u88ab\u66ff\u4ee3\uff0c\u4f46\u5728\u9700\u8981\u4e25\u683c\u63a7\u5236\u7b2c\u4e09\u65b9\u4ee3\u7801\u884c\u4e3a\u7684\u573a\u666f\u4e2d\u4ecd\u6709\u4ef7\u503c\u3002\u4f7f\u7528\u65f6\u9700\u6743\u8861\u5b89\u5168\u6027\u4e0e\u6027\u80fd\uff0c\u5e76\u6839\u636e\u5b9e\u9645\u9700\u6c42\u914d\u7f6e\u6743\u9650\u89c4\u5219\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u4e2d\u7684\u5b89\u5168\u7ba1\u7406\u5668\uff08Security [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[22],"tags":[23],"class_list":["post-170","post","type-post","status-publish","format-standard","hentry","category-itnews","tag-java"],"_links":{"self":[{"href":"https:\/\/www.ychit.top\/index.php?rest_route=\/wp\/v2\/posts\/170","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ychit.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ychit.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ychit.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ychit.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=170"}],"version-history":[{"count":1,"href":"https:\/\/www.ychit.top\/index.php?rest_route=\/wp\/v2\/posts\/170\/revisions"}],"predecessor-version":[{"id":171,"href":"https:\/\/www.ychit.top\/index.php?rest_route=\/wp\/v2\/posts\/170\/revisions\/171"}],"wp:attachment":[{"href":"https:\/\/www.ychit.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ychit.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ychit.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}