tor-android/BUILD

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// 2011/04/15 this document is a bit out of date. We will be updating to use
// the standalone cross-compiler that is offered by the Android NDK soon
This document explains how to properly build an Android package of Orbot from
source. It covers building on Debian Lenny (5.0.3).
Please install the following prerequisites (instructions for each follows):
ant: http://ant.apache.org/
Android OS SDK: http://source.android.com/download
droid-wrapper: http://github.com/tmurakam/droid-wrapper
libevent source (1.4.12-stable from svn)
Tor source (most recent git master branch)
Privoxy source (http://sourceforge.net/projects/ijbswa/)
Install and prepare the Android OS SDK ( http://source.android.com/download )
on Debian Lenny:
sudo apt-get install git-core gnupg sun-java5-jdk flex bison gperf \
libsdl-dev libesd0-dev libwxgtk2.6-dev build-essential zip \
curl libncurses5-dev zlib1g-dev valgrind libtool automake \
ruby subversion
update-java-alternatives -s java-1.5.0-sun
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mkdir ~/bin
PATH=~/bin:$PATH
curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo
chmod a+x ~/bin/repo
mkdir ~/mydroid
cd ~/mydroid
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repo init -u https://android.googlesource.com/platform/manifest -b android-2.3.7_r1
repo sync
# Paste in key from http://source.android.com/download next...
gpg --import
cd ~/mydroid
# This takes a long while...
make
Install droid-wrapper:
cd /tmp
git clone git://github.com/tmurakam/droid-wrapper.git
cd droid-wrapper
sudo make install
zlib and OpenSSL are included with the Android OS SDK. You'll need to build
libevent, Privoxy and finally Tor. We'll create an externals directory for this code:
mkdir -p ~/mydroid/external/{libevent,tor,privoxy}
We need to set to environment variables for droid-gcc:
export DROID_ROOT=~/mydroid/
export DROID_TARGET=generic
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Fetch and build Privoxy:c
cd ~/mydroid/external/privoxy
wget http://sourceforge.net/projects/ijbswa/files/Sources/3.0.12%20%28stable%29/privoxy-3.0.12-stable-src.tar.gz/download
tar xzvf privoxy-3.0.12-stable-src.tar.gz
cd privoxy-3.0.12-stable
autoheader
autoconf
#need to disable setpgrp check in configure
export ac_cv_func_setpgrp_void=yes
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CC=droid-gcc LD=droid-ld CPPFLAGS="-I$DROID_ROOT/external/zlib/" ./configure --host=arm-none-linux-gnueabi
#don't mind the "unrecognized option '-pthread'" error message that you'll see when you run make
make
Fetch and build libevent:
cd ~/mydroid/external/libevent
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svn co https://levent.svn.sourceforge.net/svnroot/levent/tags/release-1.4.13-stable/libevent/ .
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export LIBEVENTDIR=`cd $DROID_ROOT/external/libevent && pwd`
./autogen.sh
# Put the contents of http://pastebin.ca/1577207 in /tmp/libevent-patch
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# path no longer needed: patch < /tmp/libevent-patch
CC=droid-gcc LD=droid-ld ./configure --host=arm-none-linux-gnueabi
make
Copy over the libevent library:
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cp .libs/libevent.a $DROID_ROOT/out/target/product/generic/obj/lib
Fetch and build Tor:
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export OPENSSLDIR=`cd $DROID_ROOT/external/openssl/include/ && pwd`
export ZLIBDIR=`cd $DROID_ROOT/external/zlib && pwd`
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cd $DROID_ROOT/external/tor
git clone git://git.torproject.org/git/tor.git
cd tor/
./autogen.sh
CC=droid-gcc LD=droid-ld ./configure --host=arm-none-linux-gnueabi \
--with-libevent-dir=$LIBEVENTDIR --with-openssl-dir=$OPENSSLDIR \
--with-zlib-dir=$ZLIBDIR --disable-asciidoc
make
At this point, you'll have a Tor binary that can be run on an Android handset.
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You can verify the ARM binary was properly built using the following command:
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file src/or/tor
You should see something like:
src/or/tor: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped
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This isn't enough though and we'll now sew up the binary into a small package
that will handle basic Tor controlling features.
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We need to get the TorControl library for Java:
(see also https://svn.torproject.org/svn/torctl/trunk/doc/howto.txt)
git clone git://git.torproject.org/git/jtorctl
cd jtorctl
mkdir bin
javac net/freehaven/tor/control/TorControlConnection.java -d bin
cd bin
jar cvf jtorctrl.jar *
cp jtorctrl.jar {Orbot Home}/libs
Finally, we'll make a proper Android package with ant and the Android App SDK:
export APP_SDK=~/Documents/projects/android/android-sdk-linux_x86-1.5_r3/tools
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cd ../Orbot/
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cp $DROID_ROOT/external/privoxy/privoxy-3.0.12-stable/privoxy assets/privoxy
Now you need to split and copy the tor binary into res/raw. We split it into < 1M chunks
because some Android devices don't like resources larger than 1M.
split --bytes=1m $DROID_ROOT/external/tor/tor/src/or/tor res/raw/tor
Now build the Android app
$APP_SDK/android update project --name Orbot --target 3 --path .
ant release
This will produce an unsigned Tor package in ./bin/Orbot-unsigned.apk!
To produce a usable package, you'll need to sign the .apk. The basics on
signing can be found on the Android developer site:
http://developer.android.com/guide/publishing/app-signing.html
The three steps are quite simple. First, you'll generate a key. Secondly,
you'll sign the application. Thirdly, you'll verify the the apk.
Generating a signing key:
keytool -genkey -v -keystore my-release-key.keystore \
-alias orbots_key -keyalg RSA -validity 10000
Sign the apk:
jarsigner -verbose -keystore my-release-key.keystore \
bin/Orbot-unsigned.apk orbots_key
Verify the signature for the apk:
jarsigner -verify bin/Orbot-unsigned.apk
mv bin/Orbot-unsigned.apk bin/Orbot-signed-alpha.apk
You can also GPG sign the apk and generate an .asc:
gpg -ab Orbot-signed-alpha.apk
Now you should have a fully signed and production ready alpha release of Orbot!
Give bin/Orbot-signed-alpha.apk an install and send us bug reports!