Skip to content

Spring 中文文档社区
Spring 中文文档社区

曹牛马 / Spring 中文文档社区
与 Fork 源项目一致

Fork自 开发云 / Spring 中文文档社区

通知 1
Star 0
Fork 0
Spring 中文文档社区
Spring 中文文档社区

前往新版Gitcode，体验更适合开发者的 AI 搜索 >>

切换分支/标签
查找文件 普通视图历史永久链接Permalink
servlet-authorization-acls.html 91.4 KB
Newer Older
茶陵後's avatar
#1 添加本地编译文件  
茶陵後 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 
<!DOCTYPE html>
<html lang="en-US">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title>Domain Object Security (ACLs) | Spring Docs</title>
    <meta name="generator" content="VuePress 1.9.7">
    <link rel="icon" type="image/png" sizes="16x16" href="/images/icons/favicon.ico">
    <link rel="icon" type="image/png" sizes="48x48" href="/images/icons/icon-48x48.png">
    <link rel="icon" type="image/png" sizes="72x72" href="/images/icons/icon-72x72.png">
    <link rel="manifest" href="/manifest.webmanifest">
    <link rel="apple-touch-icon" href="/images/icons/icon_48x48.png">
    <link rel="mask-icon" href="/images/icons/favicon.ico" color="#5dac38">
    <script>
    var _hmt = _hmt || [];
    (function () {
      var hm = document.createElement("script");
      hm.src = "https://hm.baidu.com/hm.js?8eefd6b163dcb3f5762af6b0825e2dd1";
      var s = document.getElementsByTagName("script")[0];
      s.parentNode.insertBefore(hm, s);
    })();
    </script>
    <meta name="description" content="Complex applications often will find the need to define access permissions not simply at a web request or method invocation level.
Instead, security decisions need to comprise both who (Authentication), where (MethodInvocation) and what (SomeDomainObject).
In other words, authorization decisions also need to consider the actual domain object instance subject of a method invocation.">
    <meta name="twitter:title" content="Domain Object Security (ACLs)">
    <meta name="twitter:description" content="Complex applications often will find the need to define access permissions not simply at a web request or method invocation level.
Instead, security decisions need to comprise both who (Authentication), where (MethodInvocation) and what (SomeDomainObject).
In other words, authorization decisions also need to consider the actual domain object instance subject of a method invocation.">
    <meta name="twitter:card" content="summary">
    <meta name="twitter:url" content="https://spring.gitcode.net/en/spring-security/servlet-authorization-acls.html">
    <meta property="og:type" content="article">
    <meta property="og:title" content="Domain Object Security (ACLs)">
    <meta property="og:description" content="Complex applications often will find the need to define access permissions not simply at a web request or method invocation level.
Instead, security decisions need to comprise both who (Authentication), where (MethodInvocation) and what (SomeDomainObject).
In other words, authorization decisions also need to consider the actual domain object instance subject of a method invocation.">
    <meta property="og:url" content="https://spring.gitcode.net/en/spring-security/servlet-authorization-acls.html">
    <meta property="og:site_name" content="Spring 中文文档社区">
    <meta itemprop="name" content="Domain Object Security (ACLs)">
    <meta itemprop="description" content="Complex applications often will find the need to define access permissions not simply at a web request or method invocation level.
Instead, security decisions need to comprise both who (Authentication), where (MethodInvocation) and what (SomeDomainObject).
In other words, authorization decisions also need to consider the actual domain object instance subject of a method invocation.">
    <meta name="application-name" content="Spring 中文文档社区">
    <meta name="apple-mobile-web-app-title" content="Spring 中文社区">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <meta name="msapplication-TileColor" content="#5dac38">
    <meta name="theme-color" content="#5dac38">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="baidu-site-verification" content="code-tApgxyb9G8">
    
    <link rel="preload" href="/assets/css/0.styles.af3770e9.css" as="style"><link rel="preload" href="/assets/js/app.cf11b18e.js" as="script"><link rel="preload" href="/assets/js/3.50918073.js" as="script"><link rel="preload" href="/assets/js/4.cd4c3ff4.js" as="script"><link rel="preload" href="/assets/js/255.ac6d41ee.js" as="script"><link rel="prefetch" href="/assets/js/10.675f4d7e.js"><link rel="prefetch" href="/assets/js/100.89ddf0f9.js"><link rel="prefetch" href="/assets/js/101.a2584c55.js"><link rel="prefetch" href="/assets/js/102.53225958.js"><link rel="prefetch" href="/assets/js/103.be06048d.js"><link rel="prefetch" href="/assets/js/104.a2328e06.js"><link rel="prefetch" href="/assets/js/105.78529341.js"><link rel="prefetch" href="/assets/js/106.fc779386.js"><link rel="prefetch" href="/assets/js/107.375c8dec.js"><link rel="prefetch" href="/assets/js/108.cf4ca7e2.js"><link rel="prefetch" href="/assets/js/109.f4d3964d.js"><link rel="prefetch" href="/assets/js/11.b58e279a.js"><link rel="prefetch" href="/assets/js/110.4ae56c4d.js"><link rel="prefetch" href="/assets/js/111.baf7121d.js"><link rel="prefetch" href="/assets/js/112.a963ade8.js"><link rel="prefetch" href="/assets/js/113.edbb458c.js"><link rel="prefetch" href="/assets/js/114.7e2b354f.js"><link rel="prefetch" href="/assets/js/115.4e41285c.js"><link rel="prefetch" href="/assets/js/116.1ee84ed6.js"><link rel="prefetch" href="/assets/js/117.4952cce2.js"><link rel="prefetch" href="/assets/js/118.306eabfa.js"><link rel="prefetch" href="/assets/js/119.5a4712e9.js"><link rel="prefetch" href="/assets/js/12.c41ab7bc.js"><link rel="prefetch" href="/assets/js/120.496c9660.js"><link rel="prefetch" href="/assets/js/121.e4a22135.js"><link rel="prefetch" href="/assets/js/122.02f82a94.js"><link rel="prefetch" href="/assets/js/123.53c5a24e.js"><link rel="prefetch" href="/assets/js/124.11d8be3e.js"><link rel="prefetch" href="/assets/js/125.c0740874.js"><link rel="prefetch" href="/assets/js/126.9cb2911c.js"><link rel="prefetch" href="/assets/js/127.6f87a638.js"><link rel="prefetch" href="/assets/js/128.456206df.js"><link rel="prefetch" href="/assets/js/129.ce51dc7d.js"><link rel="prefetch" href="/assets/js/13.1147a447.js"><link rel="prefetch" href="/assets/js/130.66718f4c.js"><link rel="prefetch" href="/assets/js/131.713226b7.js"><link rel="prefetch" href="/assets/js/132.6e2b68e3.js"><link rel="prefetch" href="/assets/js/133.11148e38.js"><link rel="prefetch" href="/assets/js/134.8de25763.js"><link rel="prefetch" href="/assets/js/135.961f6693.js"><link rel="prefetch" href="/assets/js/136.8abc4532.js"><link rel="prefetch" href="/assets/js/137.331bfb6b.js"><link rel="prefetch" href="/assets/js/138.f76ee7b9.js"><link rel="prefetch" href="/assets/js/139.578aa70e.js"><link rel="prefetch" href="/assets/js/14.1c437f54.js"><link rel="prefetch" href="/assets/js/140.9f1f28a0.js"><link rel="prefetch" href="/assets/js/141.b08ac1ec.js"><link rel="prefetch" href="/assets/js/142.e5c934cf.js"><link rel="prefetch" href="/assets/js/143.2a9d47c6.js"><link rel="prefetch" href="/assets/js/144.76090f65.js"><link rel="prefetch" href="/assets/js/145.41a54d41.js"><link rel="prefetch" href="/assets/js/146.979b34c1.js"><link rel="prefetch" href="/assets/js/147.46e366af.js"><link rel="prefetch" href="/assets/js/148.efcd2b17.js"><link rel="prefetch" href="/assets/js/149.04135c0b.js"><link rel="prefetch" href="/assets/js/15.cbd21f6a.js"><link rel="prefetch" href="/assets/js/150.679d76bf.js"><link rel="prefetch" href="/assets/js/151.2b0748da.js"><link rel="prefetch" href="/assets/js/152.cee5bbcd.js"><link rel="prefetch" href="/assets/js/153.680b4156.js"><link rel="prefetch" href="/assets/js/154.0c6972fe.js"><link rel="prefetch" href="/assets/js/155.35a3e5ab.js"><link rel="prefetch" href="/assets/js/156.6782d874.js"><link rel="prefetch" href="/assets/js/157.b9fe2583.js"><link rel="prefetch" href="/assets/js/158.96656194.js"><link rel="prefetch" href="/assets/js/159.2a0f7744.js"><link rel="prefetch" href="/assets/js/16.0cc4679e.js"><link rel="prefetch" href="/assets/js/160.c26bf909.js"><link rel="prefetch" href="/assets/js/161.45a3950a.js"><link rel="prefetch" href="/assets/js/162.4a08c069.js"><link rel="prefetch" href="/assets/js/163.a540d00c.js"><link rel="prefetch" href="/assets/js/164.117eb7b8.js"><link rel="prefetch" href="/assets/js/165.4fabe2ea.js"><link rel="prefetch" href="/assets/js/166.27d3bfe9.js"><link rel="prefetch" href="/assets/js/167.c8a74627.js"><link rel="prefetch" href="/assets/js/168.e16111b9.js"><link rel="prefetch" href="/assets/js/169.458ea1d8.js"><link rel="prefetch" href="/assets/js/17.d3f5977b.js"><link rel="prefetch" href="/assets/js/170.4b38adcf.js"><link rel="prefetch" href="/assets/js/171.98cb45b7.js"><link rel="prefetch" href="/assets/js/172.9ca2eb1a.js"><link rel="prefetch" href="/assets/js/173.14074c7f.js"><link rel="prefetch" href="/assets/js/174.8e1f9887.js"><link rel="prefetch" href="/assets/js/175.5989a4ca.js"><link rel="prefetch" href="/assets/js/176.89b35f24.js"><link rel="prefetch" href="/assets/js/177.8ca04666.js"><link rel="prefetch" href="/assets/js/178.f1f78ad5.js"><link rel="prefetch" href="/assets/js/179.a1faadfe.js"><link rel="prefetch" href="/assets/js/18.1a2bbade.js"><link rel="prefetch" href="/assets/js/180.33be0a0d.js"><link rel="prefetch" href="/assets/js/181.074198fc.js"><link rel="prefetch" href="/assets/js/182.2ea92f58.js"><link rel="prefetch" href="/assets/js/183.316f0529.js"><link rel="prefetch" href="/assets/js/184.f6dd5f36.js"><link rel="prefetch" href="/assets/js/185.134f1457.js"><link rel="prefetch" href="/assets/js/186.2aa74077.js"><link rel="prefetch" href="/assets/js/187.3a956aba.js"><link rel="prefetch" href="/assets/js/188.01a6573f.js"><link rel="prefetch" href="/assets/js/189.a8d65b4d.js"><link rel="prefetch" href="/assets/js/19.e062ea88.js"><link rel="prefetch" href="/assets/js/190.c753d8e3.js"><link rel="prefetch" href="/assets/js/191.280fe1e2.js"><link rel="prefetch" href="/assets/js/192.bbc94e32.js"><link rel="prefetch" href="/assets/js/193.41421d14.js"><link rel="prefetch" href="/assets/js/194.15f508e4.js"><link rel="prefetch" href="/assets/js/195.a17f3877.js"><link rel="prefetch" href="/assets/js/196.d17bfcdf.js"><link rel="prefetch" href="/assets/js/197.65791a5a.js"><link rel="prefetch" href="/assets/js/198.0441041e.js"><link rel="prefetch" href="/assets/js/199.538f2285.js"><link rel="prefetch" href="/assets/js/20.6c49f026.js"><link rel="prefetch" href="/assets/js/200.4ff8dbc4.js"><link rel="prefetch" href="/assets/js/201.088ccf86.js"><link rel="prefetch" href="/assets/js/202.8bdad311.js"><link rel="prefetch" href="/assets/js/203.45d3ecc5.js"><link rel="prefetch" href="/assets/js/204.c403aa39.js"><link rel="prefetch" href="/assets/js/205.e992b689.js"><link rel="prefetch" href="/assets/js/206.eed8bd42.js"><link rel="prefetch" href="/assets/js/207.3db1fc87.js"><link rel="prefetch" href="/assets/js/208.27399a7b.js"><link rel="prefetch" href="/assets/js/209.829f007c.js"><link rel="prefetch" href="/assets/js/21.0ed0e55b.js"><link rel="prefetch" href="/assets/js/210.35079683.js"><link rel="prefetch" href="/assets/js/211.94056191.js"><link rel="prefetch" href="/assets/js/212.431059ab.js"><link rel="prefetch" href="/assets/js/213.4d25e21f.js"><link rel="prefetch" href="/assets/js/214.e62f8fc5.js"><link rel="prefetch" href="/assets/js/215.433d7113.js"><link rel="prefetch" href="/assets/js/216.6de56c4d.js"><link rel="prefetch" href="/assets/js/217.ad3e1cd0.js"><link rel="prefetch" href="/assets/js/218.c225521d.js"><link rel="prefetch" href="/assets/js/219.f4241738.js"><link rel="prefetch" href="/assets/js/22.3563c6e0.js"><link rel="prefetch" href="/assets/js/220.ac9c6899.js"><link rel="prefetch" href="/assets/js/221.ff4ee0d2.js"><link rel="prefetch" href="/assets/js/222.20629300.js"><link rel="prefetch" href="/assets/js/223.a5fa0166.js"><link rel="prefetch" href="/assets/js/224.65290c4f.js"><link rel="prefetch" href="/assets/js/225.e698f717.js"><link rel="prefetch" href="/assets/js/226.4b28f10d.js"><link rel="prefetch" href="/assets/js/227.f44065ae.js"><link rel="prefetch" href="/assets/js/228.0b254d68.js"><link rel="prefetch" href="/assets/js/229.560ccb5c.js"><link rel="prefetch" href="/assets/js/23.2bc6a9e3.js"><link rel="prefetch" href="/assets/js/230.2e09449c.js"><link rel="prefetch" href="/assets/js/231.b09e3f00.js"><link rel="prefetch" href="/assets/js/232.eaa54385.js"><link rel="prefetch" href="/assets/js/233.36843a48.js"><link rel="prefetch" href="/assets/js/234.1e3e41c7.js"><link rel="prefetch" href="/assets/js/235.2dff4846.js"><link rel="prefetch" href="/assets/js/236.bb6fd980.js"><link rel="prefetch" href="/assets/js/237.e97364da.js"><link rel="prefetch" href="/assets/js/238.d8ce22f3.js"><link rel="prefetch" href="/assets/js/239.be791e5e.js"><link rel="prefetch" href="/assets/js/24.4b60795e.js"><link rel="prefetch" href="/assets/js/240.3927116f.js"><link rel="prefetch" href="/assets/js/241.6539a7f9.js"><link rel="prefetch" href="/assets/js/242.1241e424.js"><link rel="prefetch" href="/assets/js/243.a07d3be3.js"><link rel="prefetch" href="/assets/js/244.f98f98a1.js"><link rel="prefetch" href="/assets/js/245.ecb7c922.js"><link rel="prefetch" href="/assets/js/246.95ed23ce.js"><link rel="prefetch" href="/assets/js/247.fb5d42c6.js"><link rel="prefetch" href="/assets/js/248.f7b4f364.js"><link rel="prefetch" href="/assets/js/249.ac22d922.js"><link rel="prefetch" href="/assets/js/25.ef18cc01.js"><link rel="prefetch" href="/assets/js/250.01fbf76b.js"><link rel="prefetch" href="/assets/js/251.08f19bbd.js"><link rel="prefetch" href="/assets/js/252.9f11061d.js"><link rel="prefetch" href="/assets/js/253.cd7f85b9.js"><link rel="prefetch" href="/assets/js/254.2493e550.js"><link rel="prefetch" href="/assets/js/256.068eb5a6.js"><link rel="prefetch" href="/assets/js/257.b108c715.js"><link rel="prefetch" href="/assets/js/258.d614b5d4.js"><link rel="prefetch" href="/assets/js/259.87ba5ef3.js"><link rel="prefetch" href="/assets/js/26.5baa4d2c.js"><link rel="prefetch" href="/assets/js/260.c771e39d.js"><link rel="prefetch" href="/assets/js/261.0dbaf460.js"><link rel="prefetch" href="/assets/js/262.35e64a26.js"><link rel="prefetch" href="/assets/js/263.c16fca32.js"><link rel="prefetch" href="/assets/js/264.ea414912.js"><link rel="prefetch" href="/assets/js/265.f2e0d5bb.js"><link rel="prefetch" href="/assets/js/266.629a2d15.js"><link rel="prefetch" href="/assets/js/267.c7332e80.js"><link rel="prefetch" href="/assets/js/268.8be99f76.js"><link rel="prefetch" href="/assets/js/269.452ff2d4.js"><link rel="prefetch" href="/assets/js/27.2a2950d8.js"><link rel="prefetch" href="/assets/js/270.a5c429cb.js"><link rel="prefetch" href="/assets/js/271.1ad3cd83.js"><link rel="prefetch" href="/assets/js/272.354cef59.js"><link rel="prefetch" href="/assets/js/273.681156b7.js"><link rel="prefetch" href="/assets/js/274.6c51e7ae.js"><link rel="prefetch" href="/assets/js/275.24ef01b4.js"><link rel="prefetch" href="/assets/js/276.afeb2acd.js"><link rel="prefetch" href="/assets/js/277.6472c22d.js"><link rel="prefetch" href="/assets/js/278.416d9788.js"><link rel="prefetch" href="/assets/js/279.c190fbc9.js"><link rel="prefetch" href="/assets/js/28.6320d8c1.js"><link rel="prefetch" href="/assets/js/280.28b1b955.js"><link rel="prefetch" href="/assets/js/281.77afd7c5.js"><link rel="prefetch" href="/assets/js/282.eee0e9c0.js"><link rel="prefetch" href="/assets/js/283.e59fb0e5.js"><link rel="prefetch" href="/assets/js/284.9c6ff275.js"><link rel="prefetch" href="/assets/js/285.3e2d030a.js"><link rel="prefetch" href="/assets/js/286.d7562f9b.js"><link rel="prefetch" href="/assets/js/287.9e228e80.js"><link rel="prefetch" href="/assets/js/288.f9448d7d.js"><link rel="prefetch" href="/assets/js/289.30726f95.js"><link rel="prefetch" href="/assets/js/29.a420635f.js"><link rel="prefetch" href="/assets/js/290.f79765e2.js"><link rel="prefetch" href="/assets/js/291.0943618c.js"><link rel="prefetch" href="/assets/js/292.bd04f6db.js"><link rel="prefetch" href="/assets/js/293.776f4c0d.js"><link rel="prefetch" href="/assets/js/294.54e52863.js"><link rel="prefetch" href="/assets/js/295.bd033d69.js"><link rel="prefetch" href="/assets/js/296.1090c539.js"><link rel="prefetch" href="/assets/js/297.ec37f6e8.js"><link rel="prefetch" href="/assets/js/298.fa434214.js"><link rel="prefetch" href="/assets/js/299.50bd7c87.js"><link rel="prefetch" href="/assets/js/30.6c81ca7b.js"><link rel="prefetch" href="/assets/js/300.7a2c6632.js"><link rel="prefetch" href="/assets/js/301.4ae4e645.js"><link rel="prefetch" href="/assets/js/302.e1ef7459.js"><link rel="prefetch" href="/assets/js/303.3894068b.js"><link rel="prefetch" href="/assets/js/304.840b09e3.js"><link rel="prefetch" href="/assets/js/305.40ec0bf6.js"><link rel="prefetch" href="/assets/js/306.9fa4d8aa.js"><link rel="prefetch" href="/assets/js/307.33656e76.js"><link rel="prefetch" href="/assets/js/308.19398f71.js"><link rel="prefetch" href="/assets/js/309.bde6f12f.js"><link rel="prefetch" href="/assets/js/31.2b4f2752.js"><link rel="prefetch" href="/assets/js/310.69ced632.js"><link rel="prefetch" href="/assets/js/311.c8e57d0e.js"><link rel="prefetch" href="/assets/js/312.80c4d6a7.js"><link rel="prefetch" href="/assets/js/313.14060a06.js"><link rel="prefetch" href="/assets/js/314.29165d83.js"><link rel="prefetch" href="/assets/js/315.901aabf1.js"><link rel="prefetch" href="/assets/js/316.7f0d18e3.js"><link rel="prefetch" href="/assets/js/317.112de6ec.js"><link rel="prefetch" href="/assets/js/318.091ea533.js"><link rel="prefetch" href="/assets/js/319.25ca175e.js"><link rel="prefetch" href="/assets/js/32.ab03e16f.js"><link rel="prefetch" href="/assets/js/320.b89e85c9.js"><link rel="prefetch" href="/assets/js/321.69316136.js"><link rel="prefetch" href="/assets/js/322.567512f0.js"><link rel="prefetch" href="/assets/js/323.2d67bb75.js"><link rel="prefetch" href="/assets/js/324.c41411db.js"><link rel="prefetch" href="/assets/js/325.a412ca77.js"><link rel="prefetch" href="/assets/js/326.22408ce6.js"><link rel="prefetch" href="/assets/js/327.33524443.js"><link rel="prefetch" href="/assets/js/328.561ebeb1.js"><link rel="prefetch" href="/assets/js/329.d7a280e4.js"><link rel="prefetch" href="/assets/js/33.199f45ed.js"><link rel="prefetch" href="/assets/js/330.d01a7e1b.js"><link rel="prefetch" href="/assets/js/331.a3ad2556.js"><link rel="prefetch" href="/assets/js/332.36ad912a.js"><link rel="prefetch" href="/assets/js/333.2fb229c4.js"><link rel="prefetch" href="/assets/js/334.d170f507.js"><link rel="prefetch" href="/assets/js/335.90ca0539.js"><link rel="prefetch" href="/assets/js/336.454d4374.js"><link rel="prefetch" href="/assets/js/337.dba45eb4.js"><link rel="prefetch" href="/assets/js/338.c8e4ba66.js"><link rel="prefetch" href="/assets/js/339.ae85118e.js"><link rel="prefetch" href="/assets/js/34.d0c7a02e.js"><link rel="prefetch" href="/assets/js/340.7033b85b.js"><link rel="prefetch" href="/assets/js/341.13cfe1aa.js"><link rel="prefetch" href="/assets/js/342.b33302b5.js"><link rel="prefetch" href="/assets/js/343.946f30dc.js"><link rel="prefetch" href="/assets/js/344.b2add405.js"><link rel="prefetch" href="/assets/js/345.12433fa3.js"><link rel="prefetch" href="/assets/js/346.b1bdfeba.js"><link rel="prefetch" href="/assets/js/347.53530bff.js"><link rel="prefetch" href="/assets/js/348.48aa580e.js"><link rel="prefetch" href="/assets/js/349.53c4baca.js"><link rel="prefetch" href="/assets/js/35.5512348f.js"><link rel="prefetch" href="/assets/js/350.e4b2d6e6.js"><link rel="prefetch" href="/assets/js/351.d41b01c1.js"><link rel="prefetch" href="/assets/js/352.1c4d1250.js"><link rel="prefetch" href="/assets/js/353.7fd27c0f.js"><link rel="prefetch" href="/assets/js/354.47199c90.js"><link rel="prefetch" href="/assets/js/355.68bccab4.js"><link rel="prefetch" href="/assets/js/356.e3602eb5.js"><link rel="prefetch" href="/assets/js/357.cd5ce764.js"><link rel="prefetch" href="/assets/js/358.bee621d4.js"><link rel="prefetch" href="/assets/js/359.648aa4f0.js"><link rel="prefetch" href="/assets/js/36.bdebdf29.js"><link rel="prefetch" href="/assets/js/360.439f5fae.js"><link rel="prefetch" href="/assets/js/361.39f782b4.js"><link rel="prefetch" href="/assets/js/362.106acf4c.js"><link rel="prefetch" href="/assets/js/363.562a4e1e.js"><link rel="prefetch" href="/assets/js/364.5940b069.js"><link rel="prefetch" href="/assets/js/365.e429c365.js"><link rel="prefetch" href="/assets/js/366.cc650df8.js"><link rel="prefetch" href="/assets/js/367.347592c9.js"><link rel="prefetch" href="/assets/js/368.d68ce88d.js"><link rel="prefetch" href="/assets/js/369.034e7f1e.js"><link rel="prefetch" href="/assets/js/37.9d026956.js"><link rel="prefetch" href="/assets/js/370.ac6fc7a5.js"><link rel="prefetch" href="/assets/js/371.e70219a6.js"><link rel="prefetch" href="/assets/js/372.c449fc49.js"><link rel="prefetch" href="/assets/js/373.f07bea72.js"><link rel="prefetch" href="/assets/js/374.8152408f.js"><link rel="prefetch" href="/assets/js/375.63c70dab.js"><link rel="prefetch" href="/assets/js/376.06de19db.js"><link rel="prefetch" href="/assets/js/377.2319ddb1.js"><link rel="prefetch" href="/assets/js/378.4821e23c.js"><link rel="prefetch" href="/assets/js/379.54a13769.js"><link rel="prefetch" href="/assets/js/38.23e83578.js"><link rel="prefetch" href="/assets/js/380.dac4cd46.js"><link rel="prefetch" href="/assets/js/381.8f83d1d7.js"><link rel="prefetch" href="/assets/js/382.e76e7d88.js"><link rel="prefetch" href="/assets/js/383.df731ee4.js"><link rel="prefetch" href="/assets/js/384.5093369e.js"><link rel="prefetch" href="/assets/js/385.ee576341.js"><link rel="prefetch" href="/assets/js/386.087a29a9.js"><link rel="prefetch" href="/assets/js/387.9f44d03b.js"><link rel="prefetch" href="/assets/js/388.a3f70992.js"><link rel="prefetch" href="/assets/js/389.df6e2ced.js"><link rel="prefetch" href="/assets/js/39.e9699d7f.js"><link rel="prefetch" href="/assets/js/390.c377efca.js"><link rel="prefetch" href="/assets/js/391.d7747385.js"><link rel="prefetch" href="/assets/js/392.bf8e8c1a.js"><link rel="prefetch" href="/assets/js/393.b4ed3be0.js"><link rel="prefetch" href="/assets/js/394.48eb505a.js"><link rel="prefetch" href="/assets/js/395.d9cd4812.js"><link rel="prefetch" href="/assets/js/396.b386a6b5.js"><link rel="prefetch" href="/assets/js/397.d19960fa.js"><link rel="prefetch" href="/assets/js/398.15f66e2a.js"><link rel="prefetch" href="/assets/js/399.cc4af83b.js"><link rel="prefetch" href="/assets/js/40.3a541653.js"><link rel="prefetch" href="/assets/js/400.d99e4b93.js"><link rel="prefetch" href="/assets/js/401.13fa06dd.js"><link rel="prefetch" href="/assets/js/402.3629b866.js"><link rel="prefetch" href="/assets/js/403.5826b040.js"><link rel="prefetch" href="/assets/js/404.d4b35549.js"><link rel="prefetch" href="/assets/js/405.9142a002.js"><link rel="prefetch" href="/assets/js/406.ba50e04d.js"><link rel="prefetch" href="/assets/js/407.b5271c6f.js"><link rel="prefetch" href="/assets/js/408.18baa241.js"><link rel="prefetch" href="/assets/js/409.6151d46b.js"><link rel="prefetch" href="/assets/js/41.b10ef41f.js"><link rel="prefetch" href="/assets/js/410.bb1fd058.js"><link rel="prefetch" href="/assets/js/411.9273fd47.js"><link rel="prefetch" href="/assets/js/412.d6b790c1.js"><link rel="prefetch" href="/assets/js/413.4c5a30bb.js"><link rel="prefetch" href="/assets/js/414.01aa0e0a.js"><link rel="prefetch" href="/assets/js/415.2633ad61.js"><link rel="prefetch" href="/assets/js/416.7a2263a9.js"><link rel="prefetch" href="/assets/js/417.98368241.js"><link rel="prefetch" href="/assets/js/418.ffeb9c9c.js"><link rel="prefetch" href="/assets/js/419.633f9efe.js"><link rel="prefetch" href="/assets/js/42.aa8b7c99.js"><link rel="prefetch" href="/assets/js/420.69868f4a.js"><link rel="prefetch" href="/assets/js/421.937d87cc.js"><link rel="prefetch" href="/assets/js/422.375fe09b.js"><link rel="prefetch" href="/assets/js/423.8d335fd6.js"><link rel="prefetch" href="/assets/js/424.d5b181d7.js"><link rel="prefetch" href="/assets/js/425.e06749ea.js"><link rel="prefetch" href="/assets/js/426.d7a23361.js"><link rel="prefetch" href="/assets/js/427.c26079c3.js"><link rel="prefetch" href="/assets/js/428.788e60b3.js"><link rel="prefetch" href="/assets/js/429.212c3091.js"><link rel="prefetch" href="/assets/js/43.bbf1f09a.js"><link rel="prefetch" href="/assets/js/430.e156b1fa.js"><link rel="prefetch" href="/assets/js/431.b41e44c6.js"><link rel="prefetch" href="/assets/js/432.7534e280.js"><link rel="prefetch" href="/assets/js/433.3d203e2b.js"><link rel="prefetch" href="/assets/js/434.41bb5350.js"><link rel="prefetch" href="/assets/js/435.a5c93fd3.js"><link rel="prefetch" href="/assets/js/436.60910866.js"><link rel="prefetch" href="/assets/js/437.7ae74f40.js"><link rel="prefetch" href="/assets/js/438.dc802af3.js"><link rel="prefetch" href="/assets/js/439.0de7c2a4.js"><link rel="prefetch" href="/assets/js/44.c0079627.js"><link rel="prefetch" href="/assets/js/440.43bc725f.js"><link rel="prefetch" href="/assets/js/441.1402dd2a.js"><link rel="prefetch" href="/assets/js/442.6106e1be.js"><link rel="prefetch" href="/assets/js/443.40909ac7.js"><link rel="prefetch" href="/assets/js/444.e506898d.js"><link rel="prefetch" href="/assets/js/445.8636f7a3.js"><link rel="prefetch" href="/assets/js/446.de915ed4.js"><link rel="prefetch" href="/assets/js/447.c7ac8e6e.js"><link rel="prefetch" href="/assets/js/448.9797a750.js"><link rel="prefetch" href="/assets/js/449.5d1f4748.js"><link rel="prefetch" href="/assets/js/45.2a09d581.js"><link rel="prefetch" href="/assets/js/450.42babefe.js"><link rel="prefetch" href="/assets/js/451.ee1b8ff8.js"><link rel="prefetch" href="/assets/js/452.7536e7c2.js"><link rel="prefetch" href="/assets/js/453.39a21d52.js"><link rel="prefetch" href="/assets/js/454.6511d1e1.js"><link rel="prefetch" href="/assets/js/455.2abb8ea0.js"><link rel="prefetch" href="/assets/js/456.5724d799.js"><link rel="prefetch" href="/assets/js/457.c32c0755.js"><link rel="prefetch" href="/assets/js/458.f67c539b.js"><link rel="prefetch" href="/assets/js/459.1634e8da.js"><link rel="prefetch" href="/assets/js/46.58b302e4.js"><link rel="prefetch" href="/assets/js/460.a22ac002.js"><link rel="prefetch" href="/assets/js/461.2c152148.js"><link rel="prefetch" href="/assets/js/462.14b038cf.js"><link rel="prefetch" href="/assets/js/463.dd0a3a00.js"><link rel="prefetch" href="/assets/js/464.f22ba288.js"><link rel="prefetch" href="/assets/js/465.9c187041.js"><link rel="prefetch" href="/assets/js/466.9957dd67.js"><link rel="prefetch" href="/assets/js/467.047041e8.js"><link rel="prefetch" href="/assets/js/468.425b6f20.js"><link rel="prefetch" href="/assets/js/469.2f70ecf7.js"><link rel="prefetch" href="/assets/js/47.987d79be.js"><link rel="prefetch" href="/assets/js/470.602b7d98.js"><link rel="prefetch" href="/assets/js/471.ddabe1b6.js"><link rel="prefetch" href="/assets/js/472.3a1ad521.js"><link rel="prefetch" href="/assets/js/473.2be352ab.js"><link rel="prefetch" href="/assets/js/474.e9c805de.js"><link rel="prefetch" href="/assets/js/475.93cab6cb.js"><link rel="prefetch" href="/assets/js/476.89384fa4.js"><link rel="prefetch" href="/assets/js/477.2b282ee8.js"><link rel="prefetch" href="/assets/js/478.27790491.js"><link rel="prefetch" href="/assets/js/479.2b728ba6.js"><link rel="prefetch" href="/assets/js/48.0e76d761.js"><link rel="prefetch" href="/assets/js/480.bd0beea9.js"><link rel="prefetch" href="/assets/js/481.004a0005.js"><link rel="prefetch" href="/assets/js/482.d9c6dc45.js"><link rel="prefetch" href="/assets/js/483.e7842361.js"><link rel="prefetch" href="/assets/js/484.702ac9a3.js"><link rel="prefetch" href="/assets/js/485.d38ba4c2.js"><link rel="prefetch" href="/assets/js/486.8a0cd211.js"><link rel="prefetch" href="/assets/js/487.18e243bb.js"><link rel="prefetch" href="/assets/js/488.cb0ad1bf.js"><link rel="prefetch" href="/assets/js/489.7c7adc5c.js"><link rel="prefetch" href="/assets/js/49.83e0619b.js"><link rel="prefetch" href="/assets/js/490.3f86a6a4.js"><link rel="prefetch" href="/assets/js/491.c1c90b4f.js"><link rel="prefetch" href="/assets/js/492.5658313d.js"><link rel="prefetch" href="/assets/js/493.9b953b18.js"><link rel="prefetch" href="/assets/js/494.80e3d4f4.js"><link rel="prefetch" href="/assets/js/495.66650a67.js"><link rel="prefetch" href="/assets/js/496.4e0d753b.js"><link rel="prefetch" href="/assets/js/497.1837b7c2.js"><link rel="prefetch" href="/assets/js/498.e2dcd450.js"><link rel="prefetch" href="/assets/js/499.4d5022f2.js"><link rel="prefetch" href="/assets/js/5.f343fd5d.js"><link rel="prefetch" href="/assets/js/50.6716fe91.js"><link rel="prefetch" href="/assets/js/500.10c0ee69.js"><link rel="prefetch" href="/assets/js/501.be3f9599.js"><link rel="prefetch" href="/assets/js/502.27844894.js"><link rel="prefetch" href="/assets/js/503.15f84a9b.js"><link rel="prefetch" href="/assets/js/504.60780a8e.js"><link rel="prefetch" href="/assets/js/505.6f9bed41.js"><link rel="prefetch" href="/assets/js/506.3e19b413.js"><link rel="prefetch" href="/assets/js/507.a12a02cb.js"><link rel="prefetch" href="/assets/js/508.b1384524.js"><link rel="prefetch" href="/assets/js/509.c74ef6c0.js"><link rel="prefetch" href="/assets/js/51.bc8d5aaf.js"><link rel="prefetch" href="/assets/js/510.266a6048.js"><link rel="prefetch" href="/assets/js/511.be98a2ef.js"><link rel="prefetch" href="/assets/js/512.e033e89e.js"><link rel="prefetch" href="/assets/js/513.837b9052.js"><link rel="prefetch" href="/assets/js/514.38271d19.js"><link rel="prefetch" href="/assets/js/515.c08327b5.js"><link rel="prefetch" href="/assets/js/516.3d573fdf.js"><link rel="prefetch" href="/assets/js/517.5406a8bd.js"><link rel="prefetch" href="/assets/js/518.543bea6f.js"><link rel="prefetch" href="/assets/js/519.e4967ce6.js"><link rel="prefetch" href="/assets/js/52.20603f07.js"><link rel="prefetch" href="/assets/js/520.0a863135.js"><link rel="prefetch" href="/assets/js/521.80c26149.js"><link rel="prefetch" href="/assets/js/522.5d0549ee.js"><link rel="prefetch" href="/assets/js/523.4b5d705c.js"><link rel="prefetch" href="/assets/js/524.24354cd8.js"><link rel="prefetch" href="/assets/js/525.d201b688.js"><link rel="prefetch" href="/assets/js/526.f405c35a.js"><link rel="prefetch" href="/assets/js/527.921d252f.js"><link rel="prefetch" href="/assets/js/528.cb45a5dd.js"><link rel="prefetch" href="/assets/js/529.aeec69e2.js"><link rel="prefetch" href="/assets/js/53.9604c447.js"><link rel="prefetch" href="/assets/js/530.7d5514c0.js"><link rel="prefetch" href="/assets/js/531.de381ab2.js"><link rel="prefetch" href="/assets/js/532.31b6e993.js"><link rel="prefetch" href="/assets/js/533.23335bff.js"><link rel="prefetch" href="/assets/js/534.131d260d.js"><link rel="prefetch" href="/assets/js/535.3057e7f2.js"><link rel="prefetch" href="/assets/js/536.1df4cc6e.js"><link rel="prefetch" href="/assets/js/537.c23a3391.js"><link rel="prefetch" href="/assets/js/538.ac3546d3.js"><link rel="prefetch" href="/assets/js/539.36137525.js"><link rel="prefetch" href="/assets/js/54.841e8e8f.js"><link rel="prefetch" href="/assets/js/540.f9171241.js"><link rel="prefetch" href="/assets/js/541.00a9732f.js"><link rel="prefetch" href="/assets/js/542.d981dcf7.js"><link rel="prefetch" href="/assets/js/543.0016cdef.js"><link rel="prefetch" href="/assets/js/544.b24fa17d.js"><link rel="prefetch" href="/assets/js/545.8adcd15c.js"><link rel="prefetch" href="/assets/js/546.189f10ef.js"><link rel="prefetch" href="/assets/js/547.d47175ac.js"><link rel="prefetch" href="/assets/js/548.67ed7a21.js"><link rel="prefetch" href="/assets/js/549.a72c957e.js"><link rel="prefetch" href="/assets/js/55.eccc64f8.js"><link rel="prefetch" href="/assets/js/550.c127415f.js"><link rel="prefetch" href="/assets/js/551.288648b2.js"><link rel="prefetch" href="/assets/js/552.5191109c.js"><link rel="prefetch" href="/assets/js/553.a0417c79.js"><link rel="prefetch" href="/assets/js/554.05224c83.js"><link rel="prefetch" href="/assets/js/555.d95f24bd.js"><link rel="prefetch" href="/assets/js/556.42a17364.js"><link rel="prefetch" href="/assets/js/557.a066d457.js"><link rel="prefetch" href="/assets/js/558.1f4641c3.js"><link rel="prefetch" href="/assets/js/559.f85fd85a.js"><link rel="prefetch" href="/assets/js/56.9ede6cf7.js"><link rel="prefetch" href="/assets/js/560.c486ead6.js"><link rel="prefetch" href="/assets/js/561.5654ef71.js"><link rel="prefetch" href="/assets/js/562.8ac06965.js"><link rel="prefetch" href="/assets/js/563.209407dd.js"><link rel="prefetch" href="/assets/js/564.4da5848b.js"><link rel="prefetch" href="/assets/js/565.0ea0c2cb.js"><link rel="prefetch" href="/assets/js/566.fbb62b05.js"><link rel="prefetch" href="/assets/js/567.0454bee2.js"><link rel="prefetch" href="/assets/js/568.5aad57f8.js"><link rel="prefetch" href="/assets/js/569.b4b199ad.js"><link rel="prefetch" href="/assets/js/57.2e9b38e9.js"><link rel="prefetch" href="/assets/js/570.890f1d05.js"><link rel="prefetch" href="/assets/js/571.56e5f721.js"><link rel="prefetch" href="/assets/js/572.fa3418f1.js"><link rel="prefetch" href="/assets/js/573.224ada77.js"><link rel="prefetch" href="/assets/js/574.4cc85330.js"><link rel="prefetch" href="/assets/js/575.61a17f5e.js"><link rel="prefetch" href="/assets/js/576.0ec5efb8.js"><link rel="prefetch" href="/assets/js/577.6bc915dd.js"><link rel="prefetch" href="/assets/js/578.fd4e39e7.js"><link rel="prefetch" href="/assets/js/579.0238c950.js"><link rel="prefetch" href="/assets/js/58.f28ad3cc.js"><link rel="prefetch" href="/assets/js/580.a08c6c02.js"><link rel="prefetch" href="/assets/js/581.392f9c6f.js"><link rel="prefetch" href="/assets/js/582.2f59e9f2.js"><link rel="prefetch" href="/assets/js/583.2097fe85.js"><link rel="prefetch" href="/assets/js/584.f0d8c622.js"><link rel="prefetch" href="/assets/js/585.85fab1f2.js"><link rel="prefetch" href="/assets/js/586.c359098c.js"><link rel="prefetch" href="/assets/js/587.1dff90c3.js"><link rel="prefetch" href="/assets/js/588.6afc16eb.js"><link rel="prefetch" href="/assets/js/589.4337cfee.js"><link rel="prefetch" href="/assets/js/59.9079a4f5.js"><link rel="prefetch" href="/assets/js/590.f969cc18.js"><link rel="prefetch" href="/assets/js/591.dfceaca2.js"><link rel="prefetch" href="/assets/js/592.b670f7b8.js"><link rel="prefetch" href="/assets/js/593.85ff3e7e.js"><link rel="prefetch" href="/assets/js/594.87d3c73b.js"><link rel="prefetch" href="/assets/js/595.18f2a1df.js"><link rel="prefetch" href="/assets/js/596.adb07b39.js"><link rel="prefetch" href="/assets/js/597.4bfdae44.js"><link rel="prefetch" href="/assets/js/598.a4f73bf5.js"><link rel="prefetch" href="/assets/js/599.5b85b7f2.js"><link rel="prefetch" href="/assets/js/6.6f5ae702.js"><link rel="prefetch" href="/assets/js/60.3095e21a.js"><link rel="prefetch" href="/assets/js/600.98cef029.js"><link rel="prefetch" href="/assets/js/601.34cfecd2.js"><link rel="prefetch" href="/assets/js/602.afaf2e1f.js"><link rel="prefetch" href="/assets/js/603.5f081041.js"><link rel="prefetch" href="/assets/js/604.a55dc3e4.js"><link rel="prefetch" href="/assets/js/605.cc600bca.js"><link rel="prefetch" href="/assets/js/606.9e0874e1.js"><link rel="prefetch" href="/assets/js/607.bd0a2835.js"><link rel="prefetch" href="/assets/js/608.e3c0bb6d.js"><link rel="prefetch" href="/assets/js/609.968adfbe.js"><link rel="prefetch" href="/assets/js/61.cd58c0e2.js"><link rel="prefetch" href="/assets/js/610.6ddb82e2.js"><link rel="prefetch" href="/assets/js/611.f6573e33.js"><link rel="prefetch" href="/assets/js/612.cd703232.js"><link rel="prefetch" href="/assets/js/613.5ae48097.js"><link rel="prefetch" href="/assets/js/614.c9fc5628.js"><link rel="prefetch" href="/assets/js/615.5f3c1162.js"><link rel="prefetch" href="/assets/js/616.3efeed17.js"><link rel="prefetch" href="/assets/js/617.25dec672.js"><link rel="prefetch" href="/assets/js/618.b53f21b6.js"><link rel="prefetch" href="/assets/js/619.e0c2de74.js"><link rel="prefetch" href="/assets/js/62.aa4d202d.js"><link rel="prefetch" href="/assets/js/620.88136c6a.js"><link rel="prefetch" href="/assets/js/621.494122df.js"><link rel="prefetch" href="/assets/js/622.e2a6e4bd.js"><link rel="prefetch" href="/assets/js/623.20a56d61.js"><link rel="prefetch" href="/assets/js/624.602dd933.js"><link rel="prefetch" href="/assets/js/625.70f44f60.js"><link rel="prefetch" href="/assets/js/626.11524978.js"><link rel="prefetch" href="/assets/js/627.b3badb72.js"><link rel="prefetch" href="/assets/js/628.e613665e.js"><link rel="prefetch" href="/assets/js/629.20e73b43.js"><link rel="prefetch" href="/assets/js/63.f7cd40f4.js"><link rel="prefetch" href="/assets/js/630.6099312f.js"><link rel="prefetch" href="/assets/js/631.669bcda0.js"><link rel="prefetch" href="/assets/js/632.d33f5ec9.js"><link rel="prefetch" href="/assets/js/633.211456ee.js"><link rel="prefetch" href="/assets/js/634.ea9d07ae.js"><link rel="prefetch" href="/assets/js/635.f22368f1.js"><link rel="prefetch" href="/assets/js/636.ebe249f7.js"><link rel="prefetch" href="/assets/js/637.7b645ab3.js"><link rel="prefetch" href="/assets/js/638.4565c395.js"><link rel="prefetch" href="/assets/js/639.c5144f9c.js"><link rel="prefetch" href="/assets/js/64.8cd3aa43.js"><link rel="prefetch" href="/assets/js/640.2dc2eba9.js"><link rel="prefetch" href="/assets/js/641.70155ce7.js"><link rel="prefetch" href="/assets/js/642.c55f5ca8.js"><link rel="prefetch" href="/assets/js/643.69a5b8e5.js"><link rel="prefetch" href="/assets/js/644.84431935.js"><link rel="prefetch" href="/assets/js/645.5119ebc2.js"><link rel="prefetch" href="/assets/js/646.506fc745.js"><link rel="prefetch" href="/assets/js/647.e5f03652.js"><link rel="prefetch" href="/assets/js/648.47ae0cc5.js"><link rel="prefetch" href="/assets/js/649.b3a67529.js"><link rel="prefetch" href="/assets/js/65.14b3da5d.js"><link rel="prefetch" href="/assets/js/650.89765bb0.js"><link rel="prefetch" href="/assets/js/651.19b73cf8.js"><link rel="prefetch" href="/assets/js/652.4436725f.js"><link rel="prefetch" href="/assets/js/653.391168ff.js"><link rel="prefetch" href="/assets/js/654.8b449d07.js"><link rel="prefetch" href="/assets/js/655.27051c8c.js"><link rel="prefetch" href="/assets/js/656.7adaae31.js"><link rel="prefetch" href="/assets/js/657.4fee46d2.js"><link rel="prefetch" href="/assets/js/658.0243a6e8.js"><link rel="prefetch" href="/assets/js/659.f69398bc.js"><link rel="prefetch" href="/assets/js/66.899fc260.js"><link rel="prefetch" href="/assets/js/660.5e51ab7c.js"><link rel="prefetch" href="/assets/js/661.980d3d5a.js"><link rel="prefetch" href="/assets/js/662.79643730.js"><link rel="prefetch" href="/assets/js/663.d030bd1d.js"><link rel="prefetch" href="/assets/js/664.32b3c0e8.js"><link rel="prefetch" href="/assets/js/665.384c456b.js"><link rel="prefetch" href="/assets/js/666.2672eb36.js"><link rel="prefetch" href="/assets/js/667.2ca85ff9.js"><link rel="prefetch" href="/assets/js/668.b80ef3b4.js"><link rel="prefetch" href="/assets/js/669.41f08cb1.js"><link rel="prefetch" href="/assets/js/67.c0e799e4.js"><link rel="prefetch" href="/assets/js/670.48512f45.js"><link rel="prefetch" href="/assets/js/671.93e1cdd9.js"><link rel="prefetch" href="/assets/js/672.aa2a7e31.js"><link rel="prefetch" href="/assets/js/673.b19ed80d.js"><link rel="prefetch" href="/assets/js/674.0337bf32.js"><link rel="prefetch" href="/assets/js/675.88a9d569.js"><link rel="prefetch" href="/assets/js/676.7fd2de1c.js"><link rel="prefetch" href="/assets/js/677.1356b477.js"><link rel="prefetch" href="/assets/js/678.d99fd658.js"><link rel="prefetch" href="/assets/js/679.a2e40bc7.js"><link rel="prefetch" href="/assets/js/68.2e72dacb.js"><link rel="prefetch" href="/assets/js/680.58e5d76e.js"><link rel="prefetch" href="/assets/js/681.2e66d773.js"><link rel="prefetch" href="/assets/js/682.42526013.js"><link rel="prefetch" href="/assets/js/683.447d4972.js"><link rel="prefetch" href="/assets/js/684.19beb22a.js"><link rel="prefetch" href="/assets/js/685.cd3fd615.js"><link rel="prefetch" href="/assets/js/686.c6200f3f.js"><link rel="prefetch" href="/assets/js/687.3d6cf8bb.js"><link rel="prefetch" href="/assets/js/688.e9ddd041.js"><link rel="prefetch" href="/assets/js/689.74bb6414.js"><link rel="prefetch" href="/assets/js/69.d29a7787.js"><link rel="prefetch" href="/assets/js/690.82b51acd.js"><link rel="prefetch" href="/assets/js/691.a6edc5c3.js"><link rel="prefetch" href="/assets/js/692.c5fd2fa7.js"><link rel="prefetch" href="/assets/js/693.0c0b8126.js"><link rel="prefetch" href="/assets/js/694.551ae4d1.js"><link rel="prefetch" href="/assets/js/695.2801a2f2.js"><link rel="prefetch" href="/assets/js/696.8723006b.js"><link rel="prefetch" href="/assets/js/697.275e71c7.js"><link rel="prefetch" href="/assets/js/698.431e2bfb.js"><link rel="prefetch" href="/assets/js/699.c82907d3.js"><link rel="prefetch" href="/assets/js/7.c8b0ee6b.js"><link rel="prefetch" href="/assets/js/70.53b18677.js"><link rel="prefetch" href="/assets/js/700.9faf8917.js"><link rel="prefetch" href="/assets/js/701.5ce77f04.js"><link rel="prefetch" href="/assets/js/702.488262eb.js"><link rel="prefetch" href="/assets/js/703.8f79363d.js"><link rel="prefetch" href="/assets/js/704.a4cfe8cb.js"><link rel="prefetch" href="/assets/js/705.4f1759eb.js"><link rel="prefetch" href="/assets/js/706.baf03b10.js"><link rel="prefetch" href="/assets/js/707.48c01840.js"><link rel="prefetch" href="/assets/js/708.b3cda177.js"><link rel="prefetch" href="/assets/js/709.260cc3a8.js"><link rel="prefetch" href="/assets/js/71.b44506bc.js"><link rel="prefetch" href="/assets/js/710.e4fa6646.js"><link rel="prefetch" href="/assets/js/711.7816aba5.js"><link rel="prefetch" href="/assets/js/712.14939ffd.js"><link rel="prefetch" href="/assets/js/72.9793c1ce.js"><link rel="prefetch" href="/assets/js/73.b4d37c7e.js"><link rel="prefetch" href="/assets/js/74.b816cbc7.js"><link rel="prefetch" href="/assets/js/75.9f45a274.js"><link rel="prefetch" href="/assets/js/76.4921e235.js"><link rel="prefetch" href="/assets/js/77.f9258c97.js"><link rel="prefetch" href="/assets/js/78.55656c0f.js"><link rel="prefetch" href="/assets/js/79.b5784c72.js"><link rel="prefetch" href="/assets/js/8.44118d7c.js"><link rel="prefetch" href="/assets/js/80.98240933.js"><link rel="prefetch" href="/assets/js/81.5421fa90.js"><link rel="prefetch" href="/assets/js/82.72a10ccf.js"><link rel="prefetch" href="/assets/js/83.abdca93e.js"><link rel="prefetch" href="/assets/js/84.5d0190e3.js"><link rel="prefetch" href="/assets/js/85.5d2a1647.js"><link rel="prefetch" href="/assets/js/86.5aea5730.js"><link rel="prefetch" href="/assets/js/87.bfe2bb57.js"><link rel="prefetch" href="/assets/js/88.4097611c.js"><link rel="prefetch" href="/assets/js/89.e5a98da0.js"><link rel="prefetch" href="/assets/js/9.612b54fd.js"><link rel="prefetch" href="/assets/js/90.5564a69b.js"><link rel="prefetch" href="/assets/js/91.ff219511.js"><link rel="prefetch" href="/assets/js/92.8191f073.js"><link rel="prefetch" href="/assets/js/93.4b6ecb16.js"><link rel="prefetch" href="/assets/js/94.fd999a73.js"><link rel="prefetch" href="/assets/js/95.c96c310d.js"><link rel="prefetch" href="/assets/js/96.2eb0ab2f.js"><link rel="prefetch" href="/assets/js/97.4c8c6fba.js"><link rel="prefetch" href="/assets/js/98.f9ef7bdb.js"><link rel="prefetch" href="/assets/js/99.513483d0.js"><link rel="prefetch" href="/assets/js/vendors~docsearch.49ad9c45.js">
    <link rel="stylesheet" href="/assets/css/0.styles.af3770e9.css">
  </head>
  <body>
    <div id="app" data-server-rendered="true"><div class="theme-container"><header class="navbar"><div class="sidebar-button"><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" viewBox="0 0 448 512" class="icon"><path fill="currentColor" d="M436 124H12c-6.627 0-12-5.373-12-12V80c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12z"></path></svg></div> <a href="/en/" class="home-link router-link-active"><img src="/images/icons/spring-logo.svg" alt="Spring Docs" class="logo"> <span class="site-name can-hide">Spring Docs</span></a> <div class="links"><div class="search-box"><input aria-label="Search" autocomplete="off" spellcheck="false" value=""> <!----></div> <nav class="nav-links can-hide"><div class="nav-item"><a href="/en/spring/why-spring.html" class="nav-link">
  Spring
</a></div><div class="nav-item"><a href="/en/spring-boot/getting-help.html" class="nav-link">
  Spring Boot
</a></div><div class="nav-item"><a href="/en/spring-cloud/documentation-overview.html" class="nav-link">
  Spring Cloud
</a></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="Others" class="dropdown-title"><span class="title">more</span> <span class="arrow down"></span></button> <button type="button" aria-label="Others" class="mobile-dropdown-title"><span class="title">more</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/en/spring-framework/overview.html" class="nav-link">
  Spring Framework
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-data/spring-data.html" class="nav-link">
  Spring Data
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-cloud-data-flow/spring-cloud-dataflow.html" class="nav-link">
  Spring Cloud Data Flow
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-security/overview.html" class="nav-link">
  Spring Security
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-for-graphql/spring-graphql.html" class="nav-link">
  Spring for GraphQL
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-session/_index.html" class="nav-link">
  Spring Session
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-integration/preface.html" class="nav-link">
  Spring Integration
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-hateoas/spring-hateoas.html" class="nav-link">
  Spring HATEOAS
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-rest-docs/spring-restdocs.html" class="nav-link">
  Spring REST Docs
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-batch/spring-batch-intro.html" class="nav-link">
  Spring Batch
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-amqp/spring-amqp.html" class="nav-link">
  Spring AMQP
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-credhub/spring-credhub.html" class="nav-link">
  Spring CredHub
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-flo/spring-flo.html" class="nav-link">
  Spring Flo
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-for-apache-kafka/spring-kafka.html" class="nav-link">
  Spring for Apache Kafka
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-ldap/spring-ldap.html" class="nav-link">
  Spring LDAP
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-shell/spring-shell.html" class="nav-link">
  Spring Shell
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-statemachine/spring-statemachine.html" class="nav-link">
  Spring Statemachine
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-vault/spring-vault.html" class="nav-link">
  Spring Vault
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-web-flow/preface.html" class="nav-link">
  Spring Web Flow
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-web-services/spring-web-service.html" class="nav-link">
  Spring Web Services
</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="Select language" class="dropdown-title"><span class="title">Language</span> <span class="arrow down"></span></button> <button type="button" aria-label="Select language" class="mobile-dropdown-title"><span class="title">Language</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/en/spring-security/servlet-authorization-acls.html" aria-current="page" class="nav-link router-link-exact-active router-link-active">
  English
</a></li><li class="dropdown-item"><!----> <a href="/spring-security/servlet-authorization-acls.html" class="nav-link">
  简体中文
</a></li></ul></div></div> <a href="https://gitcode.net/dev-cloud/spring-docs" target="_blank" rel="noopener noreferrer" class="repo-link">
    GitCode
    <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav></div></header> <div class="sidebar-mask"></div> <aside class="sidebar"><nav class="nav-links"><div class="nav-item"><a href="/en/spring/why-spring.html" class="nav-link">
  Spring
</a></div><div class="nav-item"><a href="/en/spring-boot/getting-help.html" class="nav-link">
  Spring Boot
</a></div><div class="nav-item"><a href="/en/spring-cloud/documentation-overview.html" class="nav-link">
  Spring Cloud
</a></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="Others" class="dropdown-title"><span class="title">more</span> <span class="arrow down"></span></button> <button type="button" aria-label="Others" class="mobile-dropdown-title"><span class="title">more</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/en/spring-framework/overview.html" class="nav-link">
  Spring Framework
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-data/spring-data.html" class="nav-link">
  Spring Data
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-cloud-data-flow/spring-cloud-dataflow.html" class="nav-link">
  Spring Cloud Data Flow
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-security/overview.html" class="nav-link">
  Spring Security
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-for-graphql/spring-graphql.html" class="nav-link">
  Spring for GraphQL
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-session/_index.html" class="nav-link">
  Spring Session
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-integration/preface.html" class="nav-link">
  Spring Integration
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-hateoas/spring-hateoas.html" class="nav-link">
  Spring HATEOAS
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-rest-docs/spring-restdocs.html" class="nav-link">
  Spring REST Docs
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-batch/spring-batch-intro.html" class="nav-link">
  Spring Batch
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-amqp/spring-amqp.html" class="nav-link">
  Spring AMQP
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-credhub/spring-credhub.html" class="nav-link">
  Spring CredHub
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-flo/spring-flo.html" class="nav-link">
  Spring Flo
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-for-apache-kafka/spring-kafka.html" class="nav-link">
  Spring for Apache Kafka
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-ldap/spring-ldap.html" class="nav-link">
  Spring LDAP
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-shell/spring-shell.html" class="nav-link">
  Spring Shell
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-statemachine/spring-statemachine.html" class="nav-link">
  Spring Statemachine
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-vault/spring-vault.html" class="nav-link">
  Spring Vault
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-web-flow/preface.html" class="nav-link">
  Spring Web Flow
</a></li><li class="dropdown-item"><!----> <a href="/en/spring-web-services/spring-web-service.html" class="nav-link">
  Spring Web Services
</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><button type="button" aria-label="Select language" class="dropdown-title"><span class="title">Language</span> <span class="arrow down"></span></button> <button type="button" aria-label="Select language" class="mobile-dropdown-title"><span class="title">Language</span> <span class="arrow right"></span></button> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/en/spring-security/servlet-authorization-acls.html" aria-current="page" class="nav-link router-link-exact-active router-link-active">
  English
</a></li><li class="dropdown-item"><!----> <a href="/spring-security/servlet-authorization-acls.html" class="nav-link">
  简体中文
</a></li></ul></div></div> <a href="https://gitcode.net/dev-cloud/spring-docs" target="_blank" rel="noopener noreferrer" class="repo-link">
    GitCode
    <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav>  <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading open"><span>Spring Security</span> <!----></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/en/spring-security/overview.html" class="sidebar-link">Spring Security</a></li><li><a href="/en/spring-security/prerequisites.html" class="sidebar-link">Prerequisites</a></li><li><a href="/en/spring-security/community.html" class="sidebar-link">Spring Security Community</a></li><li><a href="/en/spring-security/whats-new.html" class="sidebar-link">What’s New in Spring Security 5.6</a></li><li><a href="/en/spring-security/getting-spring-security.html" class="sidebar-link">Getting Spring Security</a></li><li><a href="/en/spring-security/features.html" class="sidebar-link">Features</a></li><li><a href="/en/spring-security/features-authentication.html" class="sidebar-link">Authentication</a></li><li><a href="/en/spring-security/features-authentication-password-storage.html" class="sidebar-link">Password Storage</a></li><li><a href="/en/spring-security/features-exploits.html" class="sidebar-link">Protection Against Exploits</a></li><li><a href="/en/spring-security/features-exploits-csrf.html" class="sidebar-link">Cross Site Request Forgery (CSRF)</a></li><li><a href="/en/spring-security/features-exploits-headers.html" class="sidebar-link">Security HTTP Response Headers</a></li><li><a href="/en/spring-security/features-exploits-http.html" class="sidebar-link">HTTP</a></li><li><a href="/en/spring-security/features-integrations.html" class="sidebar-link">Integrations</a></li><li><a href="/en/spring-security/features-integrations-cryptography.html" class="sidebar-link">Spring Security Crypto Module</a></li><li><a href="/en/spring-security/features-integrations-data.html" class="sidebar-link">Spring Data Integration</a></li><li><a href="/en/spring-security/features-integrations-concurrency.html" class="sidebar-link">Concurrency Support</a></li><li><a href="/en/spring-security/features-integrations-jackson.html" class="sidebar-link">Jackson Support</a></li><li><a href="/en/spring-security/features-integrations-localization.html" class="sidebar-link">Localization</a></li><li><a href="/en/spring-security/modules.html" class="sidebar-link">Project Modules and Dependencies</a></li><li><a href="/en/spring-security/samples.html" class="sidebar-link">Samples</a></li><li><a href="/en/spring-security/servlet.html" class="sidebar-link">Servlet Applications</a></li><li><a href="/en/spring-security/servlet-getting-started.html" class="sidebar-link">Hello Spring Security</a></li><li><a href="/en/spring-security/servlet-architecture.html" class="sidebar-link">Architecture</a></li><li><a href="/en/spring-security/servlet-authentication.html" class="sidebar-link">Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-architecture.html" class="sidebar-link">Servlet Authentication Architecture</a></li><li><a href="/en/spring-security/servlet-authentication-passwords.html" class="sidebar-link">Username/Password Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-input.html" class="sidebar-link">Reading the Username &amp; Password</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-form.html" class="sidebar-link">Form Login</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-basic.html" class="sidebar-link">Basic Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-digest.html" class="sidebar-link">Digest Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-storage.html" class="sidebar-link">Storage Mechanisms</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-storage-in-memory.html" class="sidebar-link">In-Memory Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-storage-jdbc.html" class="sidebar-link">JDBC Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-storage-user-details.html" class="sidebar-link">UserDetails</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-storage-user-details-service.html" class="sidebar-link">UserDetailsService</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-storage-password-encoder.html" class="sidebar-link">PasswordEncoder</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-storage-dao-authentication-provider.html" class="sidebar-link">DaoAuthenticationProvider</a></li><li><a href="/en/spring-security/servlet-authentication-passwords-storage-ldap.html" class="sidebar-link">LDAP Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-session-management.html" class="sidebar-link">Session Management</a></li><li><a href="/en/spring-security/servlet-authentication-rememberme.html" class="sidebar-link">Remember-Me Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-openid.html" class="sidebar-link">OpenID Support</a></li><li><a href="/en/spring-security/servlet-authentication-anonymous.html" class="sidebar-link">Anonymous Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-preauth.html" class="sidebar-link">Pre-Authentication Scenarios</a></li><li><a href="/en/spring-security/servlet-authentication-jaas.html" class="sidebar-link">Java Authentication and Authorization Service (JAAS) Provider</a></li><li><a href="/en/spring-security/servlet-authentication-cas.html" class="sidebar-link">CAS Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-x509.html" class="sidebar-link">X.509 Authentication</a></li><li><a href="/en/spring-security/servlet-authentication-runas.html" class="sidebar-link">Run-As Authentication Replacement</a></li><li><a href="/en/spring-security/servlet-authentication-logout.html" class="sidebar-link">Handling Logouts</a></li><li><a href="/en/spring-security/servlet-authentication-events.html" class="sidebar-link">Authentication Events</a></li><li><a href="/en/spring-security/servlet-authorization-.html" class="sidebar-link">Authorization</a></li><li><a href="/en/spring-security/servlet-authorization-architecture.html" class="sidebar-link">Authorization Architecture</a></li><li><a href="/en/spring-security/servlet-authorization-authorize-http-requests.html" class="sidebar-link">Authorize HttpServletRequests with AuthorizationFilter</a></li><li><a href="/en/spring-security/servlet-authorization-authorize-requests.html" class="sidebar-link">Authorize HttpServletRequest with FilterSecurityInterceptor</a></li><li><a href="/en/spring-security/servlet-authorization-expression-based.html" class="sidebar-link">Expression-Based Access Control</a></li><li><a href="/en/spring-security/servlet-authorization-secure-objects.html" class="sidebar-link">Secure Object Implementations</a></li><li><a href="/en/spring-security/servlet-authorization-method-security.html" class="sidebar-link">Method Security</a></li><li><a href="/en/spring-security/servlet-authorization-acls.html" aria-current="page" class="active sidebar-link">Domain Object Security (ACLs)</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/en/spring-security/servlet-authorization-acls.html#overview" class="sidebar-link">Overview</a></li><li class="sidebar-sub-header"><a href="/en/spring-security/servlet-authorization-acls.html#key-concepts" class="sidebar-link">Key Concepts</a></li><li class="sidebar-sub-header"><a href="/en/spring-security/servlet-authorization-acls.html#getting-started" class="sidebar-link">Getting Started</a></li></ul></li><li><a href="/en/spring-security/servlet-oauth2-.html" class="sidebar-link">OAuth2</a></li><li><a href="/en/spring-security/servlet-oauth2-login.html" class="sidebar-link">OAuth 2.0 Login</a></li><li><a href="/en/spring-security/servlet-oauth2-login-core.html" class="sidebar-link">Core Configuration</a></li><li><a href="/en/spring-security/servlet-oauth2-login-advanced.html" class="sidebar-link">Advanced Configuration</a></li><li><a href="/en/spring-security/servlet-oauth2-client.html" class="sidebar-link">OAuth 2.0 Client</a></li><li><a href="/en/spring-security/servlet-oauth2-client-core.html" class="sidebar-link">Core Interfaces / Classes</a></li><li><a href="/en/spring-security/servlet-oauth2-client-authorization-grants.html" class="sidebar-link">Authorization Grant Support</a></li><li><a href="/en/spring-security/servlet-oauth2-client-client-authentication.html" class="sidebar-link">Client Authentication Support</a></li><li><a href="/en/spring-security/servlet-oauth2-client-authorized-clients.html" class="sidebar-link">Authorized Client Features</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server.html" class="sidebar-link">OAuth 2.0 Resource Server</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server-jwt.html" class="sidebar-link">OAuth 2.0 Resource Server JWT</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server-opaque-token.html" class="sidebar-link">OAuth 2.0 Resource Server Opaque Token</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server-multitenancy.html" class="sidebar-link">OAuth 2.0 Resource Server Multitenancy</a></li><li><a href="/en/spring-security/servlet-oauth2-resource-server-bearer-tokens.html" class="sidebar-link">OAuth 2.0 Bearer Tokens</a></li><li><a href="/en/spring-security/servlet-saml2.html" class="sidebar-link">SAML2</a></li><li><a href="/en/spring-security/servlet-saml2-login.html" class="sidebar-link">SAML 2.0 Login</a></li><li><a href="/en/spring-security/servlet-saml2-login-overview.html" class="sidebar-link">SAML 2.0 Login Overview</a></li><li><a href="/en/spring-security/servlet-saml2-login-authentication-requests.html" class="sidebar-link">Producing &lt;saml2:AuthnRequest&gt;s</a></li><li><a href="/en/spring-security/servlet-saml2-login-authentication.html" class="sidebar-link">Authenticating &lt;saml2:Response&gt;s</a></li><li><a href="/en/spring-security/servlet-saml2-logout.html" class="sidebar-link">Performing Single Logout</a></li><li><a href="/en/spring-security/servlet-saml2-metadata.html" class="sidebar-link">Producing &lt;saml2:SPSSODescriptor&gt; Metadata</a></li><li><a href="/en/spring-security/servlet-exploits.html" class="sidebar-link">Protection Against Exploits</a></li><li><a href="/en/spring-security/servlet-exploits-csrf.html" class="sidebar-link">Cross Site Request Forgery (CSRF) for Servlet Environments</a></li><li><a href="/en/spring-security/servlet-exploits-headers.html" class="sidebar-link">Security HTTP Response Headers</a></li><li><a href="/en/spring-security/servlet-exploits-http.html" class="sidebar-link">HTTP</a></li><li><a href="/en/spring-security/servlet-exploits-firewall.html" class="sidebar-link">HttpFirewall</a></li><li><a href="/en/spring-security/servlet-integrations.html" class="sidebar-link">Integrations</a></li><li><a href="/en/spring-security/servlet-integrations-concurrency.html" class="sidebar-link">Concurrency Support</a></li><li><a href="/en/spring-security/servlet-integrations-jackson.html" class="sidebar-link">Jackson Support</a></li><li><a href="/en/spring-security/servlet-integrations-localization.html" class="sidebar-link">Localization</a></li><li><a href="/en/spring-security/servlet-integrations-servlet-api.html" class="sidebar-link">Servlet API integration</a></li><li><a href="/en/spring-security/servlet-integrations-data.html" class="sidebar-link">Spring Data Integration</a></li><li><a href="/en/spring-security/servlet-integrations-mvc.html" class="sidebar-link">Spring MVC Integration</a></li><li><a href="/en/spring-security/servlet-integrations-websocket.html" class="sidebar-link">WebSocket Security</a></li><li><a href="/en/spring-security/servlet-integrations-cors.html" class="sidebar-link">CORS</a></li><li><a href="/en/spring-security/servlet-integrations-jsp-taglibs.html" class="sidebar-link">JSP Tag Libraries</a></li><li><a href="/en/spring-security/servlet-configuration-java.html" class="sidebar-link">Java Configuration</a></li><li><a href="/en/spring-security/servlet-configuration-kotlin.html" class="sidebar-link">Kotlin Configuration</a></li><li><a href="/en/spring-security/servlet-configuration-xml-namespace.html" class="sidebar-link">Security Namespace Configuration</a></li><li><a href="/en/spring-security/servlet-test.html" class="sidebar-link">Testing</a></li><li><a href="/en/spring-security/servlet-test-method.html" class="sidebar-link">Testing Method Security</a></li><li><a href="/en/spring-security/servlet-test-mockmvc.html" class="sidebar-link">Spring MVC Test Integration</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-setup.html" class="sidebar-link">Setting Up MockMvc and Spring Security</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-request-post-processors.html" class="sidebar-link">SecurityMockMvcRequestPostProcessors</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-authentication.html" class="sidebar-link">Running a Test as a User in Spring MVC Test</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-csrf.html" class="sidebar-link">Testing with CSRF Protection</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-form-login.html" class="sidebar-link">Testing Form Based Authentication</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-http-basic.html" class="sidebar-link">Testing HTTP Basic Authentication</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-oauth2.html" class="sidebar-link">Testing OAuth 2.0</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-logout.html" class="sidebar-link">Testing Logout</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-request-builders.html" class="sidebar-link">SecurityMockMvcRequestBuilders</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-result-matchers.html" class="sidebar-link">SecurityMockMvcResultMatchers</a></li><li><a href="/en/spring-security/servlet-test-mockmvc-result-handlers.html" class="sidebar-link">SecurityMockMvcResultHandlers</a></li><li><a href="/en/spring-security/servlet-appendix.html" class="sidebar-link">Appendix</a></li><li><a href="/en/spring-security/servlet-appendix-database-schema.html" class="sidebar-link">Security Database Schema</a></li><li><a href="/en/spring-security/servlet-appendix-namespace.html" class="sidebar-link">The Security Namespace</a></li><li><a href="/en/spring-security/servlet-appendix-namespace-authentication-manager.html" class="sidebar-link">Authentication Services</a></li><li><a href="/en/spring-security/servlet-appendix-namespace-http.html" class="sidebar-link">Web Application Security</a></li><li><a href="/en/spring-security/servlet-appendix-namespace-method-security.html" class="sidebar-link">Method Security</a></li><li><a href="/en/spring-security/servlet-appendix-namespace-ldap.html" class="sidebar-link">LDAP Namespace Options</a></li><li><a href="/en/spring-security/servlet-appendix-namespace-websocket.html" class="sidebar-link">WebSocket Security</a></li><li><a href="/en/spring-security/servlet-appendix-faq.html" class="sidebar-link">Spring Security FAQ</a></li><li><a href="/en/spring-security/reactive.html" class="sidebar-link">Reactive Applications</a></li><li><a href="/en/spring-security/reactive-getting-started.html" class="sidebar-link">Getting Started with WebFlux Applications</a></li><li><a href="/en/spring-security/reactive-authentication-x509.html" class="sidebar-link">Reactive X.509 Authentication</a></li><li><a href="/en/spring-security/reactive-authentication-logout.html" class="sidebar-link">Logout</a></li><li><a href="/en/spring-security/reactive-authorization-authorize-http-requests.html" class="sidebar-link">Authorize ServerHttpRequest</a></li><li><a href="/en/spring-security/reactive-authorization-method.html" class="sidebar-link">EnableReactiveMethodSecurity</a></li><li><a href="/en/spring-security/reactive-oauth2.html" class="sidebar-link">OAuth2 WebFlux</a></li><li><a href="/en/spring-security/reactive-oauth2-login.html" class="sidebar-link">OAuth 2.0 Login</a></li><li><a href="/en/spring-security/reactive-oauth2-login-core.html" class="sidebar-link">Core Configuration</a></li><li><a href="/en/spring-security/reactive-oauth2-login-advanced.html" class="sidebar-link">Advanced Configuration</a></li><li><a href="/en/spring-security/reactive-oauth2-client.html" class="sidebar-link">OAuth 2.0 Client</a></li><li><a href="/en/spring-security/reactive-oauth2-client-core.html" class="sidebar-link">Core Interfaces / Classes</a></li><li><a href="/en/spring-security/reactive-oauth2-client-authorization-grants.html" class="sidebar-link">Authorization Grant Support</a></li><li><a href="/en/spring-security/reactive-oauth2-client-client-authentication.html" class="sidebar-link">Client Authentication Support</a></li><li><a href="/en/spring-security/reactive-oauth2-client-authorized-clients.html" class="sidebar-link">Authorized Clients</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server.html" class="sidebar-link">OAuth 2.0 Resource Server</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server-jwt.html" class="sidebar-link">OAuth 2.0 Resource Server JWT</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server-opaque-token.html" class="sidebar-link">OAuth 2.0 Resource Server Opaque Token</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server-multitenancy.html" class="sidebar-link">OAuth 2.0 Resource Server Multitenancy</a></li><li><a href="/en/spring-security/reactive-oauth2-resource-server-bearer-tokens.html" class="sidebar-link">OAuth 2.0 Resource Server Bearer Tokens</a></li><li><a href="/en/spring-security/reactive-exploits.html" class="sidebar-link">Protection Against Exploits</a></li><li><a href="/en/spring-security/reactive-exploits-csrf.html" class="sidebar-link">Cross Site Request Forgery (CSRF) for WebFlux Environments</a></li><li><a href="/en/spring-security/reactive-exploits-headers.html" class="sidebar-link">Security HTTP Response Headers</a></li><li><a href="/en/spring-security/reactive-exploits-http.html" class="sidebar-link">HTTP</a></li><li><a href="/en/spring-security/reactive-integrations-cors.html" class="sidebar-link">CORS</a></li><li><a href="/en/spring-security/reactive-integrations-rsocket.html" class="sidebar-link">RSocket Security</a></li><li><a href="/en/spring-security/reactive-test.html" class="sidebar-link">Reactive Test Support</a></li><li><a href="/en/spring-security/reactive-test-method.html" class="sidebar-link">Testing Method Security</a></li><li><a href="/en/spring-security/reactive-test-web.html" class="sidebar-link">Testing Web Security</a></li><li><a href="/en/spring-security/reactive-test-web-setup.html" class="sidebar-link">WebTestClient Security Setup</a></li><li><a href="/en/spring-security/reactive-test-web-authentication.html" class="sidebar-link">Testing Authentication</a></li><li><a href="/en/spring-security/reactive-test-web-csrf.html" class="sidebar-link">Testing with CSRF</a></li><li><a href="/en/spring-security/reactive-test-web-oauth2.html" class="sidebar-link">Testing OAuth 2.0</a></li><li><a href="/en/spring-security/reactive-configuration-webflux.html" class="sidebar-link">WebFlux Security</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="domain-object-security-acls"><a href="#domain-object-security-acls" class="header-anchor">#</a> Domain Object Security (ACLs)</h1> <h2 id="overview"><a href="#overview" class="header-anchor">#</a> Overview</h2> <p>Complex applications often will find the need to define access permissions not simply at a web request or method invocation level.
Instead, security decisions need to comprise both who (<code>Authentication</code>), where (<code>MethodInvocation</code>) and what (<code>SomeDomainObject</code>).
In other words, authorization decisions also need to consider the actual domain object instance subject of a method invocation.</p> <p>Imagine you’re designing an application for a pet clinic.
There will be two main groups of users of your Spring-based application: staff of the pet clinic, as well as the pet clinic’s customers.
The staff will have access to all of the data, whilst your customers will only be able to see their own customer records.
To make it a little more interesting, your customers can allow other users to see their customer records, such as their &quot;puppy preschool&quot; mentor or president of their local &quot;Pony Club&quot;.
Using Spring Security as the foundation, you have several approaches that can be used:</p> <ul><li><p>Write your business methods to enforce the security.
You could consult a collection within the <code>Customer</code> domain object instance to determine which users have access.
By using the <code>SecurityContextHolder.getContext().getAuthentication()</code>, you’ll be able to access the <code>Authentication</code> object.</p></li> <li><p>Write an <code>AccessDecisionVoter</code> to enforce the security from the <code>GrantedAuthority[]</code>s stored in the <code>Authentication</code> object.
This would mean your <code>AuthenticationManager</code> would need to populate the <code>Authentication</code> with custom <code>GrantedAuthority[]</code>s representing each of the <code>Customer</code> domain object instances the principal has access to.</p></li> <li><p>Write an <code>AccessDecisionVoter</code> to enforce the security and open the target <code>Customer</code> domain object directly.
This would mean your voter needs access to a DAO that allows it to retrieve the <code>Customer</code> object.
It would then access the <code>Customer</code> object’s collection of approved users and make the appropriate decision.</p></li></ul> <p>Each one of these approaches is perfectly legitimate.
However, the first couples your authorization checking to your business code.
The main problems with this include the enhanced difficulty of unit testing and the fact it would be more difficult to reuse the <code>Customer</code> authorization logic elsewhere.
Obtaining the <code>GrantedAuthority[]</code>s from the <code>Authentication</code> object is also fine, but will not scale to large numbers of <code>Customer</code>s.
If a user might be able to access 5,000 <code>Customer</code>s (unlikely in this case, but imagine if it were a popular vet for a large Pony Club!) the amount of memory consumed and time required to construct the <code>Authentication</code> object would be undesirable.
The final method, opening the <code>Customer</code> directly from external code, is probably the best of the three.
It achieves separation of concerns, and doesn’t misuse memory or CPU cycles, but it is still inefficient in that both the <code>AccessDecisionVoter</code> and the eventual business method itself will perform a call to the DAO responsible for retrieving the <code>Customer</code> object.
Two accesses per method invocation is clearly undesirable.
In addition, with every approach listed you’ll need to write your own access control list (ACL) persistence and business logic from scratch.</p> <p>Fortunately, there is another alternative, which we’ll talk about below.</p> <h2 id="key-concepts"><a href="#key-concepts" class="header-anchor">#</a> Key Concepts</h2> <p>Spring Security’s ACL services are shipped in the <code>spring-security-acl-xxx.jar</code>.
You will need to add this JAR to your classpath to use Spring Security’s domain object instance security capabilities.</p> <p>Spring Security’s domain object instance security capabilities centre on the concept of an access control list (ACL).
Every domain object instance in your system has its own ACL, and the ACL records details of who can and can’t work with that domain object.
With this in mind, Spring Security delivers three main ACL-related capabilities to your application:</p> <ul><li><p>A way of efficiently retrieving ACL entries for all of your domain objects (and modifying those ACLs)</p></li> <li><p>A way of ensuring a given principal is permitted to work with your objects, before methods are called</p></li> <li><p>A way of ensuring a given principal is permitted to work with your objects (or something they return), after methods are called</p></li></ul> <p>As indicated by the first bullet point, one of the main capabilities of the Spring Security ACL module is providing a high-performance way of retrieving ACLs.
This ACL repository capability is extremely important, because every domain object instance in your system might have several access control entries, and each ACL might inherit from other ACLs in a tree-like structure (this is supported out-of-the-box by Spring Security, and is very commonly used).
Spring Security’s ACL capability has been carefully designed to provide high performance retrieval of ACLs, together with pluggable caching, deadlock-minimizing database updates, independence from ORM frameworks (we use JDBC directly), proper encapsulation, and transparent database updating.</p> <p>Given databases are central to the operation of the ACL module, let’s explore the four main tables used by default in the implementation.
The tables are presented below in order of size in a typical Spring Security ACL deployment, with the table with the most rows listed last:</p> <ul><li><p>ACL_SID allows us to uniquely identify any principal or authority in the system (&quot;SID&quot; stands for &quot;security identity&quot;).
The only columns are the ID, a textual representation of the SID, and a flag to indicate whether the textual representation refers to a principal name or a <code>GrantedAuthority</code>.
Thus, there is a single row for each unique principal or <code>GrantedAuthority</code>.
When used in the context of receiving a permission, a SID is generally called a &quot;recipient&quot;.</p></li> <li><p>ACL_CLASS allows us to uniquely identify any domain object class in the system.
The only columns are the ID and the Java class name.
Thus, there is a single row for each unique Class we wish to store ACL permissions for.</p></li> <li><p>ACL_OBJECT_IDENTITY stores information for each unique domain object instance in the system.
Columns include the ID, a foreign key to the ACL_CLASS table, a unique identifier so we know which ACL_CLASS instance we’re providing information for, the parent, a foreign key to the ACL_SID table to represent the owner of the domain object instance, and whether we allow ACL entries to inherit from any parent ACL.
We have a single row for every domain object instance we’re storing ACL permissions for.</p></li> <li><p>Finally, ACL_ENTRY stores the individual permissions assigned to each recipient.
Columns include a foreign key to the ACL_OBJECT_IDENTITY, the recipient (i.e. a foreign key to ACL_SID), whether we’ll be auditing or not, and the integer bit mask that represents the actual permission being granted or denied.
We have a single row for every recipient that receives a permission to work with a domain object.</p></li></ul> <p>As mentioned in the last paragraph, the ACL system uses integer bit masking.
Don’t worry, you need not be aware of the finer points of bit shifting to use the ACL system, but suffice to say that we have 32 bits we can switch on or off.
Each of these bits represents a permission, and by default the permissions are read (bit 0), write (bit 1), create (bit 2), delete (bit 3) and administer (bit 4).
It’s easy to implement your own <code>Permission</code> instance if you wish to use other permissions, and the remainder of the ACL framework will operate without knowledge of your extensions.</p> <p>It is important to understand that the number of domain objects in your system has absolutely no bearing on the fact we’ve chosen to use integer bit masking.
Whilst you have 32 bits available for permissions, you could have billions of domain object instances (which will mean billions of rows in ACL_OBJECT_IDENTITY and quite probably ACL_ENTRY).
We make this point because we’ve found sometimes people mistakenly believe they need a bit for each potential domain object, which is not the case.</p> <p>Now that we’ve provided a basic overview of what the ACL system does, and what it looks like at a table structure, let’s explore the key interfaces.
The key interfaces are:</p> <ul><li><p><code>Acl</code>: Every domain object has one and only one <code>Acl</code> object, which internally holds the <code>AccessControlEntry</code>s as well as knows the owner of the <code>Acl</code>.
An Acl does not refer directly to the domain object, but instead to an <code>ObjectIdentity</code>.
The <code>Acl</code> is stored in the ACL_OBJECT_IDENTITY table.</p></li> <li><p><code>AccessControlEntry</code>: An <code>Acl</code> holds multiple <code>AccessControlEntry</code>s, which are often abbreviated as ACEs in the framework.
Each ACE refers to a specific tuple of <code>Permission</code>, <code>Sid</code> and <code>Acl</code>.
An ACE can also be granting or non-granting and contain audit settings.
The ACE is stored in the ACL_ENTRY table.</p></li> <li><p><code>Permission</code>: A permission represents a particular immutable bit mask, and offers convenience functions for bit masking and outputting information.
The basic permissions presented above (bits 0 through 4) are contained in the <code>BasePermission</code> class.</p></li> <li><p><code>Sid</code>: The ACL module needs to refer to principals and <code>GrantedAuthority[]</code>s.
A level of indirection is provided by the <code>Sid</code> interface, which is an abbreviation of &quot;security identity&quot;.
Common classes include <code>PrincipalSid</code> (to represent the principal inside an <code>Authentication</code> object) and <code>GrantedAuthoritySid</code>.
The security identity information is stored in the ACL_SID table.</p></li> <li><p><code>ObjectIdentity</code>: Each domain object is represented internally within the ACL module by an <code>ObjectIdentity</code>.
The default implementation is called <code>ObjectIdentityImpl</code>.</p></li> <li><p><code>AclService</code>: Retrieves the <code>Acl</code> applicable for a given <code>ObjectIdentity</code>.
In the included implementation (<code>JdbcAclService</code>), retrieval operations are delegated to a <code>LookupStrategy</code>.
The <code>LookupStrategy</code> provides a highly optimized strategy for retrieving ACL information, using batched retrievals (<code>BasicLookupStrategy</code>) and supporting custom implementations that leverage materialized views, hierarchical queries and similar performance-centric, non-ANSI SQL capabilities.</p></li> <li><p><code>MutableAclService</code>: Allows a modified <code>Acl</code> to be presented for persistence.
It is not essential to use this interface if you do not wish.</p></li></ul> <p>Please note that our out-of-the-box AclService and related database classes all use ANSI SQL.
This should therefore work with all major databases.
At the time of writing, the system had been successfully tested using Hypersonic SQL, PostgreSQL, Microsoft SQL Server and Oracle.</p> <p>Two samples ship with Spring Security that demonstrate the ACL module.
The first is the <a href="https://github.com/spring-projects/spring-security-samples/tree/5.6.x/servlet/xml/java/contacts" target="_blank" rel="noopener noreferrer">Contacts Sample<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>, and the other is the <a href="https://github.com/spring-projects/spring-security-samples/tree/5.6.x/servlet/xml/java/dms" target="_blank" rel="noopener noreferrer">Document Management System (DMS) Sample<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a>.
We suggest taking a look over these for examples.</p> <h2 id="getting-started"><a href="#getting-started" class="header-anchor">#</a> Getting Started</h2> <p>To get starting using Spring Security’s ACL capability, you will need to store your ACL information somewhere.
This necessitates the instantiation of a <code>DataSource</code> using Spring.
The <code>DataSource</code> is then injected into a <code>JdbcMutableAclService</code> and <code>BasicLookupStrategy</code> instance.
The latter provides high-performance ACL retrieval capabilities, and the former provides mutator capabilities.
Refer to one of the samples that ship with Spring Security for an example configuration.
You’ll also need to populate the database with the four ACL-specific tables listed in the last section (refer to the ACL samples for the appropriate SQL statements).</p> <p>Once you’ve created the required schema and instantiated <code>JdbcMutableAclService</code>, you’ll next need to ensure your domain model supports interoperability with the Spring Security ACL package.
Hopefully <code>ObjectIdentityImpl</code> will prove sufficient, as it provides a large number of ways in which it can be used.
Most people will have domain objects that contain a <code>public Serializable getId()</code> method.
If the return type is long, or compatible with long (e.g. an int), you will find you need not give further consideration to <code>ObjectIdentity</code> issues.
Many parts of the ACL module rely on long identifiers.
If you’re not using long (or an int, byte etc), there is a very good chance you’ll need to reimplement a number of classes.
We do not intend to support non-long identifiers in Spring Security’s ACL module, as longs are already compatible with all database sequences, the most common identifier data type, and are of sufficient length to accommodate all common usage scenarios.</p> <p>The following fragment of code shows how to create an <code>Acl</code>, or modify an existing <code>Acl</code>:</p> <p>Java</p> <div class="language- extra-class"><pre class="language-text"><code>// Prepare the information we'd like in our access control entry (ACE)
ObjectIdentity oi = new ObjectIdentityImpl(Foo.class, new Long(44));
Sid sid = new PrincipalSid(&quot;Samantha&quot;);
Permission p = BasePermission.ADMINISTRATION;

// Create or update the relevant ACL
MutableAcl acl = null;
try {
acl = (MutableAcl) aclService.readAclById(oi);
} catch (NotFoundException nfe) {
acl = aclService.createAcl(oi);
}

// Now grant some permissions via an access control entry (ACE)
acl.insertAce(acl.getEntries().length, p, sid, true);
aclService.updateAcl(acl);
</code></pre></div><p>Kotlin</p> <div class="language- extra-class"><pre class="language-text"><code>val oi: ObjectIdentity = ObjectIdentityImpl(Foo::class.java, 44)
val sid: Sid = PrincipalSid(&quot;Samantha&quot;)
val p: Permission = BasePermission.ADMINISTRATION

// Create or update the relevant ACL
var acl: MutableAcl? = null
acl = try {
aclService.readAclById(oi) as MutableAcl
} catch (nfe: NotFoundException) {
aclService.createAcl(oi)
}

// Now grant some permissions via an access control entry (ACE)
acl!!.insertAce(acl.entries.size, p, sid, true)
aclService.updateAcl(acl)
</code></pre></div><p>In the example above, we’re retrieving the ACL associated with the &quot;Foo&quot; domain object with identifier number 44.
We’re then adding an ACE so that a principal named &quot;Samantha&quot; can &quot;administer&quot; the object.
The code fragment is relatively self-explanatory, except the insertAce method.
The first argument to the insertAce method is determining at what position in the Acl the new entry will be inserted.
In the example above, we’re just putting the new ACE at the end of the existing ACEs.
The final argument is a Boolean indicating whether the ACE is granting or denying.
Most of the time it will be granting (true), but if it is denying (false), the permissions are effectively being blocked.</p> <p>Spring Security does not provide any special integration to automatically create, update or delete ACLs as part of your DAO or repository operations.
Instead, you will need to write code like shown above for your individual domain objects.
It’s worth considering using AOP on your services layer to automatically integrate the ACL information with your services layer operations.
We’ve found this quite an effective approach in the past.</p> <p>Once you’ve used the above techniques to store some ACL information in the database, the next step is to actually use the ACL information as part of authorization decision logic.
You have a number of choices here.
You could write your own <code>AccessDecisionVoter</code> or <code>AfterInvocationProvider</code> that respectively fires before or after a method invocation.
Such classes would use <code>AclService</code> to retrieve the relevant ACL and then call <code>Acl.isGranted(Permission[] permission, Sid[] sids, boolean administrativeMode)</code> to decide whether permission is granted or denied.
Alternately, you could use our <code>AclEntryVoter</code>, <code>AclEntryAfterInvocationProvider</code> or <code>AclEntryAfterInvocationCollectionFilteringProvider</code> classes.
All of these classes provide a declarative-based approach to evaluating ACL information at runtime, freeing you from needing to write any code.
Please refer to the sample applications to learn how to use these classes.</p> <p><a href="/en/spring-security/method-security.html">Method Security</a><a href="/en/oauth2/index.html">OAuth2</a></p></div> <footer class="page-edit"><div class="edit-link"><a href="https://gitcode.net/dev-cloud/spring-docs/-/blob/master/docs/en/spring-security/servlet-authorization-acls.md" target="_blank" rel="noopener noreferrer">Edit this page on GitCode</a> <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></div> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">Thu Mar 17 2022 18:19:53 GMT+0800</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
      ←
      <a href="/en/spring-security/servlet-authorization-method-security.html" class="prev">
        Method Security
      </a></span> <span class="next"><a href="/en/spring-security/servlet-oauth2-.html">
        OAuth2
      </a>
      →
    </span></p></div> </main></div><div class="global-ui"></div></div>
    <script src="/assets/js/app.cf11b18e.js" defer></script><script src="/assets/js/3.50918073.js" defer></script><script src="/assets/js/4.cd4c3ff4.js" defer></script><script src="/assets/js/255.ac6d41ee.js" defer></script>
  </body>
</html>