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AOSP自启动拦截框架Intent Firewall

news 2025/7/11 16:55:59

摘要

Intent Firewall是AOSP提供一套匹配自启动拦截框架，主要核心逻辑在service的firewall目录，拦截逻辑核心类是IntentFirewall，但AOSP的逻辑仅仅包含activity、service和broadcast简单根据配置文件名单拦截逻辑，且aosp没有提供配配置文件，故相当于功能没有生效。

自启动拦截配置表

自启动拦截配置表，IntentFire规则表

<rules>    <activity block="false" called="com.alibaba.android.rimet" caller="com.alibaba.android.rimet"        interaction="*" log="true">        <intent-filter>            <action name="android.intent.action.VIEW" />        </intent-filter>        <component-filter            name="com.alibaba.android.rimet/com.alibaba.android.rimet.biz.home.activity.HomeActivity" />    </activity></rules>

IntentFire规则表初始化

===IntentFire规则表 ===*ActivityManagerService.构造器->IntentFirewall.实例化**IntentFirewall.构造器->IntentFirewall.getRulesDir()：/data/system/ifw or /data/secure/system/ifw 目前为空**IntentFirewall.构造器->IntentFirewall.readRulesDir()***IntentFirewall.readRulesDir()->IntentFirewall.readRules() 读取广播、service和activity的拦截规则**IntentFirewall.构造器->IntentFirewall.RuleObserver() 监听文件变化

拦截Activity checkStartActivity

===拦截Activity checkStartActivity===*ActivityStarter.executeRequest->IntentFirewall.checkStartActivity(intent, callingUid,callingPid, resolvedType, aInfo.applicationInfo)**IntentFirewall.checkStartActivity->IntentFirewall.checkIntent()***IntentFirewall.checkIntent()->ActivityResolver.queryIntent() 查询拦截某个App的Intent的action的规则信息***IntentFirewall.checkIntent()->ActivityResolver.queryByComponent()查询拦截某个App的组件的规则信息***IntentFirewall.checkIntent()->Rule.matches() 当前app是否满足拦截的规则****Rule.matches() ->AndFilter.matches()*****AndFilter.matches() ->FilterList.children.Filter.matches(ComponentName,Intent) 查看action和组件是否匹配

拦截Service checkService

===拦截Service checkService===ActiveServices.retrieveServiceLocked->mIntentFirewall.checkService((r.name, service, callingUid, callingPid,resolvedType, r.appInfo)**IntentFirewall.checkService->IntentFirewall.checkIntent()

拦截广播 checkBroadcast

===拦截广播 checkBroadcast===*BroadcastSkipPolicy.shouldSkipMessage()->IntentFirewall.checkBroadcast(r.intent, r.callingUid,r.callingPid, r.resolvedType, info.activityInfo.applicationInfo.uid)**IntentFirewall.checkBroadcast->IntentFirewall.checkIntent()