Encrypted overlay filesystems implementation for Android. Also available on GitHub: https://github.com/hardcore-sushi/DroidFS
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#!/bin/bash
if [ -z ${ANDROID_NDK_HOME+x} ]; then
echo "Error: \$ANDROID_NDK_HOME is not defined."
elif [ -z ${OPENSSL_PATH+x} ]; then
echo "Error: \$OPENSSL_PATH is not defined."
else
NDK_BIN_PATH="$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin"
declare -a ABIs=("x86_64" "arm64-v8a" "armeabi-v7a")
compile_openssl(){
if [ ! -d "./lib/$1" ]; then
if [ "$1" = "x86_64" ]; then
OPENSSL_ARCH="android-x86_64"
elif [ "$1" = "arm64-v8a" ]; then
OPENSSL_ARCH="android-arm64"
elif [ "$1" = "armeabi-v7a" ]; then
OPENSSL_ARCH="android-arm"
else
echo "Invalid ABI: $1"
exit
fi
export CFLAGS=-D__ANDROID_API__=21
export PATH=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin:$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin:$PATH
(cd "$OPENSSL_PATH" && if [ -f "Makefile" ]; then make clean; fi && ./Configure $OPENSSL_ARCH -D__ANDROID_API__=21 no-stdio && make build_libs)
mkdir -p "./lib/$1" && cp "$OPENSSL_PATH/libcrypto.a" "$OPENSSL_PATH/libssl.a" "./lib/$1"
mkdir -p "./include/$1" && cp -r "$OPENSSL_PATH"/include/* "./include/$1/"
fi
}
compile_for_arch(){
compile_openssl $1
MAIN_PACKAGE="main.go"
if [ "$1" = "x86_64" ]; then
CFN="x86_64-linux-android21-clang"
elif [ "$1" = "arm64-v8a" ]; then
CFN="aarch64-linux-android21-clang"
export GOARCH=arm64
export GOARM=7
elif [ "$1" = "armeabi-v7a" ]; then
CFN="armv7a-linux-androideabi21-clang"
export GOARCH=arm
export GOARM=7
MAIN_PACKAGE="main32.go"
#patch arch specific code
sed "s/C.malloc(C.ulong/C.malloc(C.uint/g" main.go > $MAIN_PACKAGE
sed -i "s/st.Mtim.Sec/int64(st.Mtim.Sec)/g" $MAIN_PACKAGE
else
echo "Invalid ABI: $1"
exit
fi
export CC="$NDK_BIN_PATH/$CFN"
export CXX="$NDK_BIN_PATH/$CFN++"
export CGO_ENABLED=1
export GOOS=android
export CGO_CFLAGS="-I ${PWD}/include/$1"
export CGO_LDFLAGS="-Wl,-soname=libgocryptfs.so -L${PWD}/lib/$1"
go build -o build/$1/libgocryptfs.so -buildmode=c-shared $MAIN_PACKAGE
if [ $MAIN_PACKAGE = "main32.go" ]; then
rm $MAIN_PACKAGE
fi
}
if [ "$#" -eq 1 ]; then
compile_for_arch $1
else
for abi in ${ABIs[@]}; do
echo "Compiling for $abi..."
compile_for_arch $abi
done
fi
echo "Done."
fi