April 2021), the instructions in this workaround will result in your emulator getting stuck in a boot loop. Unfortunately, at the time of writing this (11. Google provided a workaround for this issue using OverlayFS. Starting from API LEVEL 29 (Android 10), it seems to be impossible to mount the “/” partition as read-write. The following steps describe how to gain write permissions on the /system partition and how to copy the certificate created in the previous step. By default, the /system partition is mounted as read-only. Now we have to place our CA certificate inside the system certificate store located at /system/etc/security/cacerts/ in the Android filesystem. Insert certificate into system certificate store

Generate hash and copy certificate : hashed_name=`openssl x509 -inform PEM -subject_hash_old -in mitmproxy-ca-cert.cer | head -1` & cp mitmproxy-ca-cert.cer $hashed_name.0.

Enter your certificate folder: cd ~/.mitmproxy/.

Otherwise Android will ignore the certificate.īy default, the mitmproxy CA certificate is located in this file: ~/.mitmproxy/mitmproxy-ca-cert.cer # Instructions It is necessary to figure out the hash of your CA certificate and copy it to a file with this hash as filename.

If the folder is empty or does not exist, run mitmproxy in order to generate the certificatesĬA Certificates in Android are stored by the name of their hash, with a ‘0’ as extension (Example: c8450d0d.0).

Usually located in ~/.mitmproxy/mitmproxy-ca-cert.cer on Linux systems.

Mitmproxy CA certificate has been created

adb usually located at /home//Android/Sdk/platform-tools/adb on Linux systemsĮxport PATH = $PATH: $HOME/Android/Sdk/platform-toolsĮxport PATH = $PATH: $HOME/Android/Sdk/emulator.

emulator usually located at /home//Android/Sdk/emulator/emulator on Linux systems.Documentation hereĮmulator and adb executables from Android Sdk have been added to $PATH variable The proxy settings of the AVD are configured to use mitmproxy.The AVD must not run a production build (these will prevent you from using adb root).PrerequisitesĪndroid Studio/Android Sdk is installed (tested with Version 4.1.3 for Linux 64-bit)Īn Android Virtual Device (AVD) was created. In this case you have to patch the application. Please note, that apps can decide to ignore the system certificate store and maintain their own CA certificates.

In order to avoid having to patch each application, which we want to monitor. Since Android 7, apps ignore user provided certificates, unless they are configured to use them.Īs most applications do not explicitly opt in to use user certificates, we need to place our mitmproxy CA certificate in the system certificate store,

# Install System CA Certificate on Android Emulator

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