Sunday, 19 February 2017

Manual setting up of adb keys in Android

There are many cases where we would like to enable ADB debugging without the use of accepting the fingerprint in the UI especially in the cases where you are bringing up the display for embedded device or on a headless android.

If you have already used adb before then there would be ".android" folder present in Linux. If it is present then you can simply copy the to the folder in /data/misc/adb folder. 

If you have created a separate "data" partition then mount the partition

For eg:
mount /dev/sdc4 /mnt/android_mnt

After the mount just copy the file to /mnt/android_mnt/misc/adb.
In my case the permissions for the file is as follows:
-rw-r--r-- root     shell         717 2017-02-18 12:43 adb_keys 

If you do not have .android folder or the above keys then create the .android folder. To create the keys do a:
adb keygen adbkey

This will create the above 2 files adbkey and Copy the public key. Please note that the file created is but the file name has to be when put in the misc/adb folder.