{"id":17537,"date":"2024-11-18T11:48:16","date_gmt":"2024-11-18T03:48:16","guid":{"rendered":"https:\/\/fwq.ai\/blog\/17537\/"},"modified":"2024-11-18T11:48:16","modified_gmt":"2024-11-18T03:48:16","slug":"%e5%88%86%e6%9e%90selinux%ef%bc%9a%e5%8e%9f%e7%90%86%e4%b8%8e%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/17537\/","title":{"rendered":"\u5206\u6790SELinux\uff1a\u539f\u7406\u4e0e\u5b9e\u8df5"},"content":{"rendered":"

\"\u5206\u6790SELinux\uff1a\u539f\u7406\u4e0e\u5b9e\u8df5\u63d2\u56fe\"<\/p>\n

\u8fd1\u5e74\u6765\uff0c\u968f\u7740\u4fe1\u606f\u6280\u672f\u7684\u8fc5\u731b\u53d1\u5c55\uff0c\u7f51\u7edc\u5b89\u5168\u95ee\u9898\u6108\u53d1\u51f8\u663e\u3002\u4e3a\u4e86\u63d0\u5347\u7cfb\u7edf\u7684\u5b89\u5168\u6027\uff0c\u5404\u7c7b\u5b89\u5168\u673a\u5236\u5e94\u8fd0\u800c\u751f\u3002\u5176\u4e2d\uff0cSELinux\uff08Security-Enhanced Linux\uff09\u4f5c\u4e3a\u4e00\u79cd\u5b89\u5168\u6269\u5c55\u6a21\u5757\uff0c\u88ab\u5e7f\u6cdb\u4f7f\u7528\u4e8eLinux\u7cfb\u7edf\uff0c\u4e3a\u7cfb\u7edf\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7ea7\u522b\u7684\u5b89\u5168\u653f\u7b56\u5b9e\u65bd\u3002<\/p>\n

\u4e00\u3001SELinux\u529f\u80fd\u539f\u7406<\/h3>\n

\u4ee5\u6388\u6743\u8bbf\u95ee\u7684\u65b9\u5f0f\u6765\u9650\u5236\u7a0b\u5e8f\u7684\u6743\u9650\u548c\u884c\u4e3a\u662fSELinux\u7684\u6838\u5fc3\u601d\u60f3\u3002\u4f20\u7edf\u7684Linux\u6743\u9650\u673a\u5236\uff08\u5982\u6743\u9650\u4f4d\u6216\u8bbf\u95ee\u63a7\u5236\u5217\u8868\uff09\u901a\u5e38\u53ea\u80fd\u5bf9\u6587\u4ef6\u6216\u76ee\u5f55\u5e94\u7528\uff0c\u800cSELinux\u5141\u8bb8\u5bf9\u6bcf\u4e2a\u7a0b\u5e8f\uff08\u5373\u8fdb\u7a0b\uff09\u8fdb\u884c\u66f4\u7cbe\u7ec6\u7684\u63a7\u5236\u3002<\/p>\n

\u5728SELinux\u4e2d\uff0c\u6743\u9650\u63a7\u5236\u4e3b\u8981\u4f9d\u8d56\u4e8e\u6807\u7b7e\uff08Label\uff09\u673a\u5236\uff0c\u5373\u7ed9\u4e88\u6bcf\u4e2a\u8fdb\u7a0b\u3001\u6587\u4ef6\u6216\u8005\u5176\u4ed6\u8d44\u6e90\u4e00\u4e2a\u72ec\u4e00\u65e0\u4e8c\u7684\u6807\u7b7e\uff0c\u8868\u660e\u5176\u5b89\u5168\u4e0a\u4e0b\u6587\u3002\u8fd9\u4e9b\u6807\u7b7e\u88ab\u79f0\u4e3aSELinux\u5b89\u5168\u6807\u8bc6\u7b26\uff08Security Identifier\uff0c\u7b80\u79f0SID\uff09\u3002<\/p>\n

SELinux\u64cd\u4f5c\u7684\u57fa\u672c\u5143\u7d20\u5305\u62ec\u4e3b\u4f53\uff08Subject\uff09\u3001\u5ba2\u4f53\uff08Object\uff09\u548c\u64cd\u4f5c\uff08Operation\uff09\u3002\u4e3b\u4f53\u4ee3\u8868\u64cd\u4f5c\u7684\u4e3b\u4f53\uff0c\u6bd4\u5982\u8fdb\u7a0b\uff1b\u5ba2\u4f53\u4ee3\u8868\u88ab\u64cd\u4f5c\u7684\u5bf9\u8c61\uff0c\u6bd4\u5982\u6587\u4ef6\uff1b\u64cd\u4f5c\u5219\u6307\u7684\u662f\u4e3b\u4f53\u5bf9\u5ba2\u4f53\u7684\u64cd\u4f5c\u884c\u4e3a\u3002\u901a\u8fc7\u5bf9\u8fd9\u4e9b\u5143\u7d20\u4e4b\u95f4\u7684\u5173\u7cfb\u8fdb\u884c\u63a7\u5236\uff0cSELinux\u5b9e\u73b0\u4e86\u5bf9\u7cfb\u7edf\u8d44\u6e90\u7684\u5b89\u5168\u8bbf\u95ee\u3002<\/p>\n

\u4e8c\u3001SELinux\u5b9e\u9645\u5e94\u7528<\/h3>\n

1. SELinux\u7b56\u7565\u7ba1\u7406<\/h4>\n

SELinux\u7684\u7b56\u7565\u662f\u4e00\u4e2a\u975e\u5e38\u5173\u952e\u7684\u6982\u5ff5\uff0c\u5b83\u5b9a\u4e49\u4e86\u7cfb\u7edf\u4e2d\u8fdb\u7a0b\u80fd\u591f\u6267\u884c\u54ea\u4e9b\u64cd\u4f5c\uff0c\u4ee5\u53ca\u5bf9\u54ea\u4e9b\u8d44\u6e90\u5177\u6709\u8bbf\u95ee\u6743\u9650\u3002\u901a\u5e38\uff0c\u7cfb\u7edf\u7ba1\u7406\u5458\u6839\u636e\u7cfb\u7edf\u7684\u9700\u6c42\u548c\u5b89\u5168\u8981\u6c42\uff0c\u7f16\u5199\u81ea\u5b9a\u4e49\u7684SELinux\u7b56\u7565\u6587\u4ef6\u6765\u5b9e\u73b0\u7ec6\u7c92\u5ea6\u7684\u6743\u9650\u63a7\u5236\u3002<\/p>\n

2. SELinux\u4e0a\u4e0b\u6587<\/h4>\n

SELinux\u4e0a\u4e0b\u6587\u6d89\u53ca\u5230\u5bf9\u6587\u4ef6\u3001\u8fdb\u7a0b\u7b49\u8d44\u6e90\u8fdb\u884c\u6807\u8bb0\uff0c\u4ee5\u4fbfSELinux\u80fd\u591f\u6839\u636e\u8fd9\u4e9b\u6807\u8bb0\u6765\u505a\u51fa\u5b89\u5168\u8bbf\u95ee\u51b3\u7b56\u3002\u5728Linux\u4e2d\uff0c\u53ef\u901a\u8fc7\u547d\u4ee4ls -Z\u67e5\u770b\u6587\u4ef6\u7684SELinux\u4e0a\u4e0b\u6587\u4fe1\u606f\uff0c\u901a\u8fc7ps -eZ\u6765\u67e5\u770b\u8fdb\u7a0b\u7684SELinux\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002<\/p>\n

3. SELinux\u914d\u7f6e<\/h4>\n

\u901a\u5e38\uff0c\u901a\u8fc7\u4fee\u6539SELinux\u914d\u7f6e\u6587\u4ef6\/etc\/selinux\/config\u6765\u914d\u7f6eSELinux\u7684\u5de5\u4f5c\u6a21\u5f0f\u3002\u5e38\u89c1\u7684\u6a21\u5f0f\u5305\u62ec\u201cEnforcing\u201d\uff08\u5f3a\u5236\u6267\u884c\uff09\u3001\u201cPermissive\u201d\uff08\u5bbd\u677e\u6267\u884c\uff09\u548c\u201cDisabled\u201d\uff08\u7981\u7528SELinux\uff09\u7b49\u3002<\/p>\n

\u4e09\u3001SELinux\u7684\u4ee3\u7801\u793a\u4f8b<\/h3>\n

\u4e0b\u9762\uff0c\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793aSELinux\u7684\u5e94\u7528\uff1a<\/p>\n

import os\n\n# \u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684SELinux\u5b89\u5168\u4e0a\u4e0b\u6587\ndef get_selinux_context(pid):\n    try:\n        with open(f\"\/proc\/{pid}\/attr\/current\", \"r\") as f:\n            return f.read().strip()\n    except FileNotFoundError:\n        return \"Not found\"\n\n# \u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684PID\uff0c\u5e76\u6253\u5370\u5176SELinux\u4e0a\u4e0b\u6587\npid = os.getpid()\nselinux_context = get_selinux_context(pid)\nprint(f\"PID {pid} \u7684SELinux\u4e0a\u4e0b\u6587\u4e3a\uff1a{selinux_context}\")<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684SELinux\u5b89\u5168\u4e0a\u4e0b\u6587\uff0c\u5e76\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n
\u7ed3\u8bed<\/h3>\n
\u603b\u7684\u6765\u8bf4\uff0cSELinux\u4f5c\u4e3a\u4e00\u79cd\u91cd\u8981\u7684\u5b89\u5168\u6269\u5c55\u6a21\u5757\uff0c\u4e3aLinux\u7cfb\u7edf\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5b89\u5168\u4fdd\u62a4\u673a\u5236\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5408\u7406\u914d\u7f6e\u548c\u4f7f\u7528SELinux\u53ef\u4ee5\u5e2e\u52a9\u63d0\u5347\u7cfb\u7edf\u7684\u5b89\u5168\u6027\uff0c\u907f\u514d\u6f5c\u5728\u7684\u5b89\u5168\u98ce\u9669\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u60a8\u5bf9SELinux\u7684\u529f\u80fd\u539f\u7406\u548c\u5b9e\u9645\u5e94\u7528\u6709\u6240\u542f\u53d1\uff0c\u5e76\u4e14\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u5206\u6790SELinux\uff1a\u539f\u7406\u4e0e\u5b9e\u8df5\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8fd1\u5e74\u6765\uff0c\u968f\u7740\u4fe1\u606f\u6280\u672f\u7684\u8fc5\u731b\u53d1\u5c55\uff0c\u7f51\u7edc\u5b89\u5168\u95ee\u9898\u6108\u53d1\u51f8\u663e\u3002\u4e3a\u4e86\u63d0\u5347\u7cfb\u7edf\u7684\u5b89\u5168\u6027\uff0c\u5404\u7c7b\u5b89\u5168\u673a\u5236\u5e94\u8fd0\u800c\u751f\u3002\u5176\u4e2d\uff0cSELinux\uff08Security-Enhanced Linux\uff09\u4f5c\u4e3a\u4e00\u79cd\u5b89\u5168\u6269\u5c55\u6a21\u5757\uff0c\u88ab\u5e7f\u6cdb\u4f7f\u7528\u4e8eLinux\u7cfb\u7edf\uff0c\u4e3a\u7cfb\u7edf\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7ea7\u522b\u7684\u5b89\u5168\u653f\u7b56\u5b9e\u65bd\u3002 \u4e00\u3001SELinux\u529f\u80fd\u539f\u7406 \u4ee5\u6388\u6743\u8bbf\u95ee\u7684\u65b9\u5f0f\u6765\u9650\u5236\u7a0b\u5e8f\u7684\u6743\u9650\u548c\u884c\u4e3a\u662fSELinux\u7684\u6838\u5fc3\u601d\u60f3\u3002\u4f20\u7edf\u7684Linux\u6743\u9650\u673a\u5236\uff08\u5982\u6743\u9650\u4f4d\u6216\u8bbf\u95ee\u63a7\u5236\u5217\u8868\uff09\u901a\u5e38\u53ea\u80fd\u5bf9\u6587\u4ef6\u6216\u76ee\u5f55\u5e94\u7528\uff0c\u800cSELinux\u5141\u8bb8\u5bf9\u6bcf\u4e2a\u7a0b\u5e8f\uff08\u5373\u8fdb\u7a0b\uff09\u8fdb\u884c\u66f4\u7cbe\u7ec6\u7684\u63a7\u5236\u3002 \u5728SELinux\u4e2d\uff0c\u6743\u9650\u63a7\u5236\u4e3b\u8981\u4f9d\u8d56\u4e8e\u6807\u7b7e\uff08Label\uff09\u673a\u5236\uff0c\u5373\u7ed9\u4e88\u6bcf\u4e2a\u8fdb\u7a0b\u3001\u6587\u4ef6\u6216\u8005\u5176\u4ed6\u8d44\u6e90\u4e00\u4e2a\u72ec\u4e00\u65e0\u4e8c\u7684\u6807\u7b7e\uff0c\u8868\u660e\u5176\u5b89\u5168\u4e0a\u4e0b\u6587\u3002\u8fd9\u4e9b\u6807\u7b7e\u88ab\u79f0\u4e3aSELinux\u5b89\u5168\u6807\u8bc6\u7b26\uff08Security Identifier\uff0c\u7b80\u79f0SID\uff09\u3002 SELinux\u64cd\u4f5c\u7684\u57fa\u672c\u5143\u7d20\u5305\u62ec\u4e3b\u4f53\uff08Subject\uff09\u3001\u5ba2\u4f53\uff08Object\uff09\u548c\u64cd\u4f5c\uff08Operation\uff09\u3002\u4e3b\u4f53\u4ee3\u8868\u64cd\u4f5c\u7684\u4e3b\u4f53\uff0c\u6bd4\u5982\u8fdb\u7a0b\uff1b\u5ba2\u4f53\u4ee3\u8868\u88ab\u64cd\u4f5c\u7684\u5bf9\u8c61\uff0c\u6bd4\u5982\u6587\u4ef6\uff1b\u64cd\u4f5c\u5219\u6307\u7684\u662f\u4e3b\u4f53\u5bf9\u5ba2\u4f53\u7684\u64cd\u4f5c\u884c\u4e3a\u3002\u901a\u8fc7\u5bf9\u8fd9\u4e9b\u5143\u7d20\u4e4b\u95f4\u7684\u5173\u7cfb\u8fdb\u884c\u63a7\u5236\uff0cSELinux\u5b9e\u73b0\u4e86\u5bf9\u7cfb\u7edf\u8d44\u6e90\u7684\u5b89\u5168\u8bbf\u95ee\u3002 \u4e8c\u3001SELinux\u5b9e\u9645\u5e94\u7528 1. SELinux\u7b56\u7565\u7ba1\u7406 SELinux\u7684\u7b56\u7565\u662f\u4e00\u4e2a\u975e\u5e38\u5173\u952e\u7684\u6982\u5ff5\uff0c\u5b83\u5b9a\u4e49\u4e86\u7cfb\u7edf\u4e2d\u8fdb\u7a0b\u80fd\u591f\u6267\u884c\u54ea\u4e9b\u64cd\u4f5c\uff0c\u4ee5\u53ca\u5bf9\u54ea\u4e9b\u8d44\u6e90\u5177\u6709\u8bbf\u95ee\u6743\u9650\u3002\u901a\u5e38\uff0c\u7cfb\u7edf\u7ba1\u7406\u5458\u6839\u636e\u7cfb\u7edf\u7684\u9700\u6c42\u548c\u5b89\u5168\u8981\u6c42\uff0c\u7f16\u5199\u81ea\u5b9a\u4e49\u7684SELinux\u7b56\u7565\u6587\u4ef6\u6765\u5b9e\u73b0\u7ec6\u7c92\u5ea6\u7684\u6743\u9650\u63a7\u5236\u3002 2. SELinux\u4e0a\u4e0b\u6587 SELinux\u4e0a\u4e0b\u6587\u6d89\u53ca\u5230\u5bf9\u6587\u4ef6\u3001\u8fdb\u7a0b\u7b49\u8d44\u6e90\u8fdb\u884c\u6807\u8bb0\uff0c\u4ee5\u4fbfSELinux\u80fd\u591f\u6839\u636e\u8fd9\u4e9b\u6807\u8bb0\u6765\u505a\u51fa\u5b89\u5168\u8bbf\u95ee\u51b3\u7b56\u3002\u5728Linux\u4e2d\uff0c\u53ef\u901a\u8fc7\u547d\u4ee4ls -Z\u67e5\u770b\u6587\u4ef6\u7684SELinux\u4e0a\u4e0b\u6587\u4fe1\u606f\uff0c\u901a\u8fc7ps -eZ\u6765\u67e5\u770b\u8fdb\u7a0b\u7684SELinux\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002 3. SELinux\u914d\u7f6e \u901a\u5e38\uff0c\u901a\u8fc7\u4fee\u6539SELinux\u914d\u7f6e\u6587\u4ef6\/etc\/selinux\/config\u6765\u914d\u7f6eSELinux\u7684\u5de5\u4f5c\u6a21\u5f0f\u3002\u5e38\u89c1\u7684\u6a21\u5f0f\u5305\u62ec\u201cEnforcing\u201d\uff08\u5f3a\u5236\u6267\u884c\uff09\u3001\u201cPermissive\u201d\uff08\u5bbd\u677e\u6267\u884c\uff09\u548c\u201cDisabled\u201d\uff08\u7981\u7528SELinux\uff09\u7b49\u3002 \u4e09\u3001SELinux\u7684\u4ee3\u7801\u793a\u4f8b \u4e0b\u9762\uff0c\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793aSELinux\u7684\u5e94\u7528\uff1a import os # \u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684SELinux\u5b89\u5168\u4e0a\u4e0b\u6587 def get_selinux_context(pid): try: with open(f”\/proc\/{pid}\/attr\/current”, “r”) as f: return f.read().strip() except FileNotFoundError: return “Not found” # \u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684PID\uff0c\u5e76\u6253\u5370\u5176SELinux\u4e0a\u4e0b\u6587 pid = os.getpid() selinux_context = get_selinux_context(pid) print(f”PID {pid} \u7684SELinux\u4e0a\u4e0b\u6587\u4e3a\uff1a{selinux_context}”) \u767b\u5f55\u540e\u590d\u5236 \u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684SELinux\u5b89\u5168\u4e0a\u4e0b\u6587\uff0c\u5e76\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002 \u7ed3\u8bed \u603b\u7684\u6765\u8bf4\uff0cSELinux\u4f5c\u4e3a\u4e00\u79cd\u91cd\u8981\u7684\u5b89\u5168\u6269\u5c55\u6a21\u5757\uff0c\u4e3aLinux\u7cfb\u7edf\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5b89\u5168\u4fdd\u62a4\u673a\u5236\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5408\u7406\u914d\u7f6e\u548c\u4f7f\u7528SELinux\u53ef\u4ee5\u5e2e\u52a9\u63d0\u5347\u7cfb\u7edf\u7684\u5b89\u5168\u6027\uff0c\u907f\u514d\u6f5c\u5728\u7684\u5b89\u5168\u98ce\u9669\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u60a8\u5bf9SELinux\u7684\u529f\u80fd\u539f\u7406\u548c\u5b9e\u9645\u5e94\u7528\u6709\u6240\u542f\u53d1\uff0c\u5e76\u4e14\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-17537","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=17537"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17537\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=17537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=17537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=17537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}