NSS:Android

NSS Android build

Setting up the Cross build environment

Downloading the NDK

Download and extract the Android NDK. NDK rev 5 has been tested and are known to work. Builders currently use NDKr5c.

wget http://dl.google.com/android/ndk/android-ndk-r5c-linux-x86.tar.bz2
tar -xjf android-ndk-r5c-linux-x86.tar.bz2

Getting the Runtime

If you are on Linux 32 bit, you are done. If you are Linux 64 bit, you may need to get the following packages:

glibc.i686 zlib.i686 libstdc++.i686

On Fedora or RHEL you can get this with

yum install glibc.i686 zlib.i686 libstdc++.i686

Set up your environment

You must set the environment variable ANDROID_NDK to the path where you extracted the NDK.

  export ANDROID_NDK={path to your ndk}

Setting up your Android device

Getting SSHDroid

The android test system uses sftp and ssh to talk to our android device In order to use these, you must first install SSHDroid. You can find SSHDroid in Google Play at https://play.google.com/store/apps/details?id=berserker.android.apps.sshdroid&hl=en . You can install it with Google Play.

Once it's installed, lauch the app and note the filed marked 'Address'. It will look something like:

sftp://root@10.23.45.123:2222

The 2222 is the port, and root@10.23.45.123 is the address. You will want to set those environment as the environment variables ANDROID_PORT and ANDROID_ADDR on your Linux host:

export ANDROID_PORT=2222
export ANDROID_ADDR=root@10.23.45.123

Be sure to use the your actual values (not my examples).

Setting up certificates

First you need to follow the instructions [1] to set up a pair of SSH keys on your Linux host. If you already have SSH keys set up, then you can skip this step.

Now you need to install the ssh keys into your SSHDroid. Start your SSHDroid App, then run the following on your Linux host.

cd ~/.ssh
sftp -o PORT=$ANDROID_PORT $ANDROID_ADDR
put id_rsa.pub /sdcard
exit

Now in the SSHDroid App on your Android:

select the menu, 
select "Manage keys", 
select menu, 
select "Import key", 
select "Browse"
scroll down and select id_rsa.pub
select "OK"

Building

Get your nss tree as normal. You'll need to get nss, nspr, and dbm. These instructions are for NSS 3.14. The easiest way to get and NSS tree is with cvs:

cvs checkout -d pserver:anonymous@cvs.mozilla.org:/cvsroot mozilla/nsprpub
 mozilla/dbm mozilla/security/coreconf mozilla/security/nss mozilla/security/dbm

Apply the patch located File:Nss-android.odp.

Use the NSS Makefile to build android:

make arm_android_build_all

Running the tests

Once NSS for Android has built, you can run the tests on your android device as follows:

make arm_android_install
make arm_android_tests

NOTE: The tests do yet pass. UPDATE: The tests that are failing are the fips tests because PR_GetLibraryFilePathname() currently does not work on android. In android NDK versions before 8 dladdr wasn't support. In versions after 8, dladdr does not correctly return the full path to the library, which is what we are trying to get in PR_GetLibraryFilePathname(). At this point I'm waiting util wtc gets back from vacation to talk about possible solutions.