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https://github.com/carlospolop/hacktricks
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47 lines
1.8 KiB
Markdown
47 lines
1.8 KiB
Markdown
# Make APK Accept CA Certificate
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Some applications don't like user downloaded certificates, so in order to inspect web traffic for some apps we actually have to decompile the application & add a few things & recompile it.
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## Automatic
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The tool [**https://github.com/shroudedcode/apk-mitm**](https://github.com/shroudedcode/apk-mitm) will **automatically** make the necessary changes to the application to start capturing the requests and will also disable certificate pinning \(if any\).
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## Manual
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First we decompile the app: `apktool d *file-name*.apk`
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Then we go into the **Manifest.xml** file & scroll down to the `<\application android>` tag & we are going to add the following line if it isn't already there:
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`android:networkSecurityConfig="@xml/network_security_config`
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Before adding:
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After adding:
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Now go into the **res/xml** folder & create/modify a file named network\_security\_config.xml with the following contents:
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```markup
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<network-security-config>
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<base-config>
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<trust-anchors>
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<!-- Trust preinstalled CAs -->
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<certificates src="system" />
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<!-- Additionally trust user added CAs -->
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<certificates src="user" />
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</trust-anchors>
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</base-config>
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</network-security-config>
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```
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Then save the file & back out of all the directories & rebuild the apk with the following command: `apktool b *folder-name/* -o *output-file.apk*`
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Finally, you need just to **sign the new application**. [Read this section of the page Smali - Decompiling/\[Modifying\]/Compiling to learn how to sign it](smali-changes.md#sing-the-new-apk).
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