{"id":51435,"date":"2024-12-03T11:21:05","date_gmt":"2024-12-03T03:21:05","guid":{"rendered":"https:\/\/fwq.ai\/blog\/51435\/"},"modified":"2024-12-03T11:21:05","modified_gmt":"2024-12-03T03:21:05","slug":"%e6%8e%a2%e7%a9%b6selinux%e7%9a%84%e4%b8%89%e7%a7%8d%e7%ad%96%e7%95%a5%e5%88%86%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/51435\/","title":{"rendered":"\u63a2\u7a76SELinux\u7684\u4e09\u79cd\u7b56\u7565\u5206\u7c7b"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u63a2\u7a76SELinux\u7684\u4e09\u79cd\u7b56\u7565\u5206\u7c7b<\/h1>\n<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7c73\u4e91\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u63a2\u7a76SELinux\u7684\u4e09\u79cd\u7b56\u7565\u5206\u7c7b\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n<p>SELinux \u662f\u4e00\u79cd\u5f3a\u5236\u8bbf\u95ee\u63a7\u5236\u5b89\u5168\u6280\u672f\uff0c\u7528\u4e8e\u52a0\u5f3a Linux \u64cd\u4f5c\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u3002\u5728 SELinux \u4e2d\uff0c\u7b56\u7565\u88ab\u5206\u4e3a\u4e09\u79cd\u4e3b\u8981\u5206\u7c7b\uff1a\u76ee\u6807\u7b56\u7565\uff08Targeted Policy\uff09\u3001\u591a\u7b56\u7565\uff08MLS\/MCS Policy\uff09\u548c\u5b9a\u5236\u7b56\u7565\uff08Custom Policy\uff09\u3002\u8fd9\u4e09\u79cd\u7b56\u7565\u5206\u7c7b\u5728 SELinux \u7684\u5b89\u5168\u673a\u5236\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u7684\u89d2\u8272\uff0c\u672c\u6587\u5c06\u7ed3\u5408\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e09\u79cd\u7b56\u7565\u5206\u7c7b\u3002<\/p>\n<ol>\n<li>\u76ee\u6807\u7b56\u7565\uff08Targeted Policy\uff09<br \/>\u76ee\u6807\u7b56\u7565\u662f SELinux \u4e2d\u6700\u5e38\u7528\u7684\u4e00\u79cd\u7b56\u7565\u5206\u7c7b\uff0c\u5b83\u57fa\u4e8e\u7528\u6237\u3001\u7a0b\u5e8f\u548c\u8fdb\u7a0b\u4e4b\u95f4\u7684\u5173\u7cfb\u6765\u9650\u5236\u8bbf\u95ee\u6743\u9650\u3002\u5728\u76ee\u6807\u7b56\u7565\u4e2d\uff0c\u53ea\u6709\u5c11\u6570\u7684\u7528\u6237\u6216\u8fdb\u7a0b\u88ab\u5b9a\u4e49\u4e3a\u5b89\u5168\u7b56\u7565\uff0c\u5176\u4ed6\u7528\u6237\u6216\u8fdb\u7a0b\u5219\u7ee7\u627f\u9ed8\u8ba4\u7b56\u7565\u3002\u901a\u8fc7\u7ed9\u8fd9\u4e9b\u7528\u6237\u6216\u8fdb\u7a0b\u5206\u914d\u89d2\u8272\u548c\u6743\u9650\uff0c\u53ef\u4ee5\u6709\u6548\u63a7\u5236\u5b83\u4eec\u7684\u8bbf\u95ee\u6743\u9650\u3002<\/li>\n<\/ol>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u6f14\u793a\u5982\u4f55\u4f7f\u7528\u76ee\u6807\u7b56\u7565\u6765\u9650\u5236\u4e00\u4e2a\u7528\u6237\u5bf9\u67d0\u4e2a\u6587\u4ef6\u7684\u8bbf\u95ee\u6743\u9650\uff1a<\/p>\n<pre># \u521b\u5efa\u4e00\u4e2a\u6d4b\u8bd5\u6587\u4ef6\ntouch testfile.txt\n\n# \u4e3a\u8be5\u6587\u4ef6\u8bbe\u7f6e\u5b89\u5168\u4e0a\u4e0b\u6587\nchcon system_u:object_r:admin_home_t:s0 testfile.txt\n\n# \u521b\u5efa\u4e00\u4e2a\u7528\u6237\nuseradd testuser\n\n# \u7ed9\u8be5\u7528\u6237\u5206\u914d\u89d2\u8272\u548c\u6743\u9650\nsemanage user -a -R \"staff_r system_r\" testuser\n\n# \u5207\u6362\u7528\u6237\u81f3 testuser\nsu testuser\n\n# \u5c1d\u8bd5\u8bfb\u53d6\u6587\u4ef6\ncat testfile.txt<\/pre>\n<ol>\n<li>\u591a\u7b56\u7565\uff08MLS\/MCS Policy\uff09<br \/>\u591a\u7b56\u7565\u662f\u4e00\u79cd\u66f4\u52a0\u4e25\u683c\u7684\u7b56\u7565\u5206\u7c7b\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u7ec6\u7c92\u5ea6\u7684\u5b89\u5168\u63a7\u5236\u3002\u5728 MLS\uff08Multi-Level Security\uff09\u548c MCS\uff08Multi-Category Security\uff09\u7b56\u7565\u4e2d\uff0c\u6587\u4ef6\u548c\u8fdb\u7a0b\u6839\u636e\u5176\u5b89\u5168\u7b49\u7ea7\u6216\u7c7b\u522b\u88ab\u5212\u5206\u5230\u4e0d\u540c\u7684\u8bbf\u95ee\u63a7\u5236\u57df\u4e2d\uff0c\u8fdb\u800c\u5b9e\u73b0\u5bf9\u5404\u4e2a\u57df\u4e4b\u95f4\u7684\u8bbf\u95ee\u63a7\u5236\u3002<\/li>\n<\/ol>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u6f14\u793a\u5982\u4f55\u5728\u4e00\u4e2a MLS \u7b56\u7565\u4e2d\u8bbe\u7f6e\u6587\u4ef6\u7684\u5b89\u5168\u7b49\u7ea7\uff1a<\/p>\n<pre># \u521b\u5efa\u4e00\u4e2a\u6d4b\u8bd5\u6587\u4ef6\ntouch testfile.txt\n\n# \u4e3a\u8be5\u6587\u4ef6\u8bbe\u7f6e\u5b89\u5168\u7b49\u7ea7\nsetfattr -n security.selinux -v \"s0:c0,c1\" testfile.txt\n\n# \u67e5\u770b\u6587\u4ef6\u7684\u5b89\u5168\u7b49\u7ea7\ngetfattr -n security.selinux testfile.txt<\/pre>\n<ol>\n<li>\u5b9a\u5236\u7b56\u7565\uff08Custom Policy\uff09<br \/>\u5b9a\u5236\u7b56\u7565\u662f\u6307\u6839\u636e\u7279\u5b9a\u9700\u6c42\u81ea\u5b9a\u4e49\u7684\u7b56\u7565\uff0c\u7528\u4e8e\u5b9e\u73b0\u4e2a\u6027\u5316\u7684\u5b89\u5168\u63a7\u5236\u3002\u901a\u8fc7\u7f16\u5199\u81ea\u5b9a\u4e49\u7b56\u7565\u6a21\u5757\u4ee5\u53ca\u76f8\u5173\u89c4\u5219\uff0c\u53ef\u4ee5\u5bf9 SELinux \u7684\u9ed8\u8ba4\u884c\u4e3a\u8fdb\u884c\u5b9a\u5236\uff0c\u6ee1\u8db3\u7279\u5b9a\u7684\u5b89\u5168\u9700\u6c42\u3002<\/li>\n<\/ol>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u6f14\u793a\u5982\u4f55\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684 SELinux \u81ea\u5b9a\u4e49\u7b56\u7565\u6a21\u5757\uff1a<\/p>\n<pre>#include &lt;selinux\/selinux.h&gt;\n#include &lt;selinux\/label.h&gt;\n\nint main() {\n    security_context_t scontext, tcontext;\n    char *class = \"file\";\n    char *perms = \"read\";\n    security_id_t sid, tid;\n\n    int rc = getfilecon(\"\/etc\/passwd\", &amp;scontext);\n    if (rc &lt; 0) {\n        perror(\"getfilecon\");\n        return 1;\n    }\n\n    rc = security_compute_user(scontext, &amp;sid, &amp;tcontext);\n    if (rc &lt; 0) {\n        perror(\"security_compute_user\");\n        return 1;\n    }\n\n    rc = security_compute_av(sid, class, perms, &amp;tid);\n    if (rc &lt; 0) {\n        perror(\"security_compute_av\");\n        return 1;\n    }\n\n    printf(\"Source context: %s\n\", tcontext);\n    printf(\"Target context: %s\n\", tcontext);\n\n    return 0;\n}<\/pre>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u793a\u4f8b\uff0c\u6211\u4eec\u5bf9 SELinux \u7684\u76ee\u6807\u7b56\u7565\u3001\u591a\u7b56\u7565\u548c\u5b9a\u5236\u7b56\u7565\u8fdb\u884c\u4e86\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5e76\u63d0\u4f9b\u4e86\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u901a\u8fc7\u4e86\u89e3\u548c\u638c\u63e1\u8fd9\u4e9b\u7b56\u7565\u5206\u7c7b\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u52a0\u6df1\u5165\u5730\u7406\u89e3 SELinux \u7684\u5b89\u5168\u673a\u5236\uff0c\u5e76\u66f4\u597d\u5730\u5e94\u7528\u4e8e\u5b9e\u9645\u7684\u7cfb\u7edf\u5b89\u5168\u63a7\u5236\u4e2d\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u7c73\u4e91\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u3002<\/p>\n<dl>\n<dt><\/dt>\n<dd>\n   \u8c03\u6574Win10\u6e38\u620f\u5f55\u5236\u7684\u97f3\u9891\u8d28\u91cf\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7a76SELinux\u7684\u4e09\u79cd\u7b56\u7565\u5206\u7c7b \u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7c73\u4e91\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u63a2\u7a76SELinux\u7684\u4e09\u79cd\u7b56\u7565\u5206\u7c7b\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01 SELinux \u662f\u4e00\u79cd\u5f3a\u5236\u8bbf\u95ee\u63a7\u5236\u5b89\u5168\u6280\u672f\uff0c\u7528\u4e8e\u52a0\u5f3a Linux \u64cd\u4f5c\u7cfb\u7edf\u7684\u5b89\u5168\u6027\u3002\u5728 SELinux \u4e2d\uff0c\u7b56\u7565\u88ab\u5206\u4e3a\u4e09\u79cd\u4e3b\u8981\u5206\u7c7b\uff1a\u76ee\u6807\u7b56\u7565\uff08Targeted Policy\uff09\u3001\u591a\u7b56\u7565\uff08MLS\/MCS Policy\uff09\u548c\u5b9a\u5236\u7b56\u7565\uff08Custom Policy\uff09\u3002\u8fd9\u4e09\u79cd\u7b56\u7565\u5206\u7c7b\u5728 SELinux \u7684\u5b89\u5168\u673a\u5236\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u7684\u89d2\u8272\uff0c\u672c\u6587\u5c06\u7ed3\u5408\u5177\u4f53\u4ee3\u7801\u793a\u4f8b\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e09\u79cd\u7b56\u7565\u5206\u7c7b\u3002 \u76ee\u6807\u7b56\u7565\uff08Targeted Policy\uff09\u76ee\u6807\u7b56\u7565\u662f SELinux \u4e2d\u6700\u5e38\u7528\u7684\u4e00\u79cd\u7b56\u7565\u5206\u7c7b\uff0c\u5b83\u57fa\u4e8e\u7528\u6237\u3001\u7a0b\u5e8f\u548c\u8fdb\u7a0b\u4e4b\u95f4\u7684\u5173\u7cfb\u6765\u9650\u5236\u8bbf\u95ee\u6743\u9650\u3002\u5728\u76ee\u6807\u7b56\u7565\u4e2d\uff0c\u53ea\u6709\u5c11\u6570\u7684\u7528\u6237\u6216\u8fdb\u7a0b\u88ab\u5b9a\u4e49\u4e3a\u5b89\u5168\u7b56\u7565\uff0c\u5176\u4ed6\u7528\u6237\u6216\u8fdb\u7a0b\u5219\u7ee7\u627f\u9ed8\u8ba4\u7b56\u7565\u3002\u901a\u8fc7\u7ed9\u8fd9\u4e9b\u7528\u6237\u6216\u8fdb\u7a0b\u5206\u914d\u89d2\u8272\u548c\u6743\u9650\uff0c\u53ef\u4ee5\u6709\u6548\u63a7\u5236\u5b83\u4eec\u7684\u8bbf\u95ee\u6743\u9650\u3002 \u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff0c\u6f14\u793a\u5982\u4f55\u4f7f\u7528\u76ee\u6807\u7b56\u7565\u6765\u9650\u5236\u4e00\u4e2a\u7528\u6237\u5bf9\u67d0\u4e2a\u6587\u4ef6\u7684\u8bbf\u95ee\u6743\u9650\uff1a # \u521b\u5efa\u4e00\u4e2a\u6d4b\u8bd5\u6587\u4ef6 touch testfile.txt # \u4e3a\u8be5\u6587\u4ef6\u8bbe\u7f6e\u5b89\u5168\u4e0a\u4e0b\u6587 chcon system_u:object_r:admin_home_t:s0 testfile.txt # \u521b\u5efa\u4e00\u4e2a\u7528\u6237 useradd testuser # \u7ed9\u8be5\u7528\u6237\u5206\u914d\u89d2\u8272\u548c\u6743\u9650 semanage user -a -R &#8220;staff_r system_r&#8221; testuser # \u5207\u6362\u7528\u6237\u81f3 testuser su testuser # \u5c1d\u8bd5\u8bfb\u53d6\u6587\u4ef6 cat testfile.txt \u591a\u7b56\u7565\uff08MLS\/MCS Policy\uff09\u591a\u7b56\u7565\u662f\u4e00\u79cd\u66f4\u52a0\u4e25\u683c\u7684\u7b56\u7565\u5206\u7c7b\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u7ec6\u7c92\u5ea6\u7684\u5b89\u5168\u63a7\u5236\u3002\u5728 MLS\uff08Multi-Level Security\uff09\u548c MCS\uff08Multi-Category Security\uff09\u7b56\u7565\u4e2d\uff0c\u6587\u4ef6\u548c\u8fdb\u7a0b\u6839\u636e\u5176\u5b89\u5168\u7b49\u7ea7\u6216\u7c7b\u522b\u88ab\u5212\u5206\u5230\u4e0d\u540c\u7684\u8bbf\u95ee\u63a7\u5236\u57df\u4e2d\uff0c\u8fdb\u800c\u5b9e\u73b0\u5bf9\u5404\u4e2a\u57df\u4e4b\u95f4\u7684\u8bbf\u95ee\u63a7\u5236\u3002 [&hellip;]<\/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-51435","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/51435","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=51435"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/51435\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=51435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=51435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=51435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}