#!/bin/bash

# This script builds the iOS and Mac openSSL libraries
# Download openssl http://www.openssl.org/source/ and place the tarball next to this script
# Change the version to match and run

VERSION="1.0.1m"
OPENSSL_VERSION="openssl-${VERSION}"

# Credits:
# https://github.com/st3fan/ios-openssl
# https://github.com/x2on/OpenSSL-for-iPhone/blob/master/build-libssl.sh

set -e

usage ()
{
	echo "usage: $0 [iOS SDK version (defaults to xcrun --show-sdk-version]"
	exit 127
}

if [ $1 -e "-h" ]; then
	usage
fi

if [ -z $1 ]; then
	SDKVERSION=`xcrun -sdk iphoneos --show-sdk-version`
else
	SDKVERSION=$1
fi

echo "SDK version $SDKVERSION"

CURRENTPATH=`pwd`
ARCHS="i386 x86_64 armv7 armv7s arm64"
DEVELOPER=`xcode-select -print-path`
if [ ! -d "$DEVELOPER" ]; then
  echo "xcode path is not set correctly $DEVELOPER does not exist (most likely because of xcode > 4.3)"
  echo "run"
  echo "sudo xcode-select -switch <xcode path>"
  echo "for default installation:"
  echo "sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer"
  exit 1
fi
case $DEVELOPER in  
     *\ * )
           echo "Your Xcode path contains whitespaces, which is not supported."
           exit 1
          ;;
esac
case $CURRENTPATH in  
     *\ * )
           echo "Your path contains whitespaces, which is not supported by 'make install'."
           exit 1
          ;;
esac

buildMac()
{
	ARCH=$1

	echo "Building ${OPENSSL_VERSION} for ${ARCH}"

	TARGET="darwin-i386-cc"

	if [[ $ARCH == "x86_64" ]]; then
		TARGET="darwin64-x86_64-cc"
	fi

	pushd . > /dev/null
	./Configure ${TARGET} --openssldir="${CURRENTPATH}/${OPENSSL_VERSION}-${ARCH}" &> "${CURRENTPATH}/${OPENSSL_VERSION}-${ARCH}.log"
	make >> "${CURRENTPATH}/${OPENSSL_VERSION}-${ARCH}.log" 2>&1
	make install >> "${CURRENTPATH}/${OPENSSL_VERSION}-${ARCH}.log" 2>&1
	make clean >> "${CURRENTPATH}/${OPENSSL_VERSION}-${ARCH}.log" 2>&1
	popd > /dev/null
}

buildIOS()
{
for ARCH in ${ARCHS}
do
	if [[ "${ARCH}" == "i386" || "${ARCH}" == "x86_64" ]];
	then
		PLATFORM="iPhoneSimulator"
	else
		sed -ie "s!static volatile sig_atomic_t intr_signal;!static volatile intr_signal;!" "crypto/ui/ui_openssl.c"
		PLATFORM="iPhoneOS"
	fi
	
	export CROSS_TOP="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer"
	export CROSS_SDK="${PLATFORM}${SDKVERSION}.sdk"
	export BUILD_TOOLS="${DEVELOPER}"
	echo "Building openssl-${VERSION} for ${PLATFORM} ${SDKVERSION} ${ARCH}"
	echo "Please stand by..."
	export CC="${BUILD_TOOLS}/usr/bin/gcc -arch ${ARCH}"
	mkdir -p "${CURRENTPATH}/bin/${PLATFORM}${SDKVERSION}-${ARCH}.sdk"
	LOG="${CURRENTPATH}/bin/${PLATFORM}${SDKVERSION}-${ARCH}.sdk/build-openssl-${VERSION}.log"
	set +e
    if [[ "$VERSION" =~ 1.0.0. ]]; then
	    ./Configure BSD-generic32 --openssldir="${CURRENTPATH}/bin/${PLATFORM}${SDKVERSION}-${ARCH}.sdk" > "${LOG}" 2>&1
	elif [ "${ARCH}" == "x86_64" ]; then
	    ./Configure darwin64-x86_64-cc --openssldir="${CURRENTPATH}/bin/${PLATFORM}${SDKVERSION}-${ARCH}.sdk" > "${LOG}" 2>&1
    else
	    ./Configure iphoneos-cross --openssldir="${CURRENTPATH}/bin/${PLATFORM}${SDKVERSION}-${ARCH}.sdk" > "${LOG}" 2>&1
    fi
    
    if [ $? != 0 ];
    then 
    	echo "Problem while configure - Please check ${LOG}"
    	exit 1
    fi
	# add -isysroot to CC=
	sed -ie "s!^CFLAG=!CFLAG=-isysroot ${CROSS_TOP}/SDKs/${CROSS_SDK} -miphoneos-version-min=7.0 !" "Makefile"
	if [ "$1" == "verbose" ];
	then
		make
	else
		make >> "${LOG}" 2>&1
	fi
	
	if [ $? != 0 ];
    then 
    	echo "Problem while make - Please check ${LOG}"
    	exit 1
    fi
    
    set -e
	make install >> "${LOG}" 2>&1
	make clean >> "${LOG}" 2>&1
done
}

if [ ! -e ${OPENSSL_VERSION}.tar.gz ]; then
	echo "Downloading ${OPENSSL_VERSION}.tar.gz"
	curl -O http://www.openssl.org/source/${OPENSSL_VERSION}.tar.gz
else
	echo "Using ${OPENSSL_VERSION}.tar.gz"
fi

echo "Unpacking openssl"
mkdir -p "${CURRENTPATH}/src"
mkdir -p "${CURRENTPATH}/bin"
mkdir -p "${CURRENTPATH}/lib/iOS"
mkdir -p "${CURRENTPATH}/lib/OSX"

tar zxf openssl-${VERSION}.tar.gz -C "${CURRENTPATH}/src"
cd "${CURRENTPATH}/src/openssl-${VERSION}"

buildMac "i386"
buildMac "x86_64"

echo "Building OSX libraries"
lipo \
	"${CURRENTPATH}/${OPENSSL_VERSION}-i386/lib/libcrypto.a" \
	"${CURRENTPATH}/${OPENSSL_VERSION}-x86_64/lib/libcrypto.a" \
	-create -output ${CURRENTPATH}/lib/OSX/libcrypto.a

lipo \
	"${CURRENTPATH}/${OPENSSL_VERSION}-i386/lib/libssl.a" \
	"${CURRENTPATH}/${OPENSSL_VERSION}-x86_64/lib/libssl.a" \
	-create -output ${CURRENTPATH}/lib/OSX/libssl.a

buildIOS

echo "Building iOS libraries"
lipo -create ${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}-i386.sdk/lib/libssl.a \
	${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}-x86_64.sdk/lib/libssl.a  \
	${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7.sdk/lib/libssl.a \
	${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7s.sdk/lib/libssl.a \
	${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-arm64.sdk/lib/libssl.a \
	-output ${CURRENTPATH}/lib/iOS/libssl.a

lipo -create ${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}-i386.sdk/lib/libcrypto.a \
	${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}-x86_64.sdk/lib/libcrypto.a \
	${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7.sdk/lib/libcrypto.a \
	${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-armv7s.sdk/lib/libcrypto.a \
	${CURRENTPATH}/bin/iPhoneOS${SDKVERSION}-arm64.sdk/lib/libcrypto.a \
	-output ${CURRENTPATH}/lib/iOS/libcrypto.a

echo "Copying headers"
mkdir -p ${CURRENTPATH}/include
cp -R ${CURRENTPATH}/bin/iPhoneSimulator${SDKVERSION}-i386.sdk/include/openssl ${CURRENTPATH}/include/
echo "Building done."