#!/bin/bash

# 

# Copyright 2015 Thincast Technologies GmbH

# 

# This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. 

# If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#

# This script will download and build openssl for iOS and simulator - see ARCHS for architectures built

## Settings

# openssl version to use

OPENSSLVERSION="1.0.2q"

SHA256SUM="5744cfcbcec2b1b48629f7354203bc1e5e9b5466998bbccc5b5fcde3b18eb684"

# SDK version to use - if not set latest version found is used

SDK_VERSION=""

# Minimum SDK version the application supports

MIN_SDK_VERSION="10.0"

## Defaults

INSTALLDIR="external"

# Architectures to build

ARCHS="i386 x86_64 armv7 armv7s arm64"

# Use default SDK version if not set

if [ -z ${SDK_VERSION} ]; then

    SDK_VERSION=`xcrun -sdk iphoneos --show-sdk-version`

fi

CORES=`sysctl hw.ncpu | awk '{print $2}'`

MAKEOPTS="-j $CORES"

# disable parallell builds since openssl build

# fails sometimes

MAKEOPTS=""

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

function run {

    "$@"

    local status=$?

    if [ $status -ne 0 ]; then

        echo "error with $@" >&2

        exit $status

    fi

    return $status

}

# Functions

function buildArch(){

    ARCH=$1

    if [[ "${ARCH}" == "i386" || "${ARCH}" == "x86_64" ]];

    then

        PLATFORM="iPhoneSimulator"

    else

        run sed -ie "s!static volatile sig_atomic_t intr_signal;!static volatile intr_signal;!" "crypto/ui/ui_openssl.c"

        PLATFORM="iPhoneOS"

    fi

    run export CROSS_TOP="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer"

    run export CROSS_SDK="${PLATFORM}${SDK_VERSION}.sdk"

    run export BUILD_TOOLS="${DEVELOPER}"

    run export CC="${BUILD_TOOLS}/usr/bin/gcc -arch ${ARCH}"

    if [ ! -z $MIN_SDK_VERSION ]; then

        run export CC="$CC -miphoneos-version-min=${MIN_SDK_VERSION}"

    fi

    echo "Building openssl-${OPENSSLVERSION} for ${PLATFORM} ${SDK_VERSION} ${ARCH} (min SDK set: ${MIN_SDK_VERSION:-"none"})"

    LOGFILE="BuildLog.darwin-${ARCH}.txt"

    echo -n " Please wait ..."

    if [[ "$OPENSSLVERSION" =~ 1.0.0. ]]; then

        run ./Configure BSD-generic32 > "${LOGFILE}" 2>&1

    elif [ "${ARCH}" == "x86_64" ]; then

        run ./Configure darwin64-x86_64-cc > "${LOGFILE}" 2>&1

    elif [ "${ARCH}" == "i386" ]; then

        run ./Configure iphoneos-cross no-asm > "${LOGFILE}" 2>&1

    else

        run ./Configure iphoneos-cross  > "${LOGFILE}" 2>&1

    fi

    run make ${MAKEOPTS} >> ${LOGFILE} 2>&1

    echo " Done. Build log saved in ${LOGFILE}"

    run cp libcrypto.a ../../lib/libcrypto_${ARCH}.a

    run cp libssl.a ../../lib/libssl_${ARCH}.a

    run make clean >/dev/null 2>&1

}

# main

if [ $# -gt 0 ];then

    INSTALLDIR=$1

    if [ ! -d $INSTALLDIR ];then

        echo "Install directory \"$INSTALLDIR\" does not exist"

        exit 1

    fi

fi

cd $INSTALLDIR

if [ ! -d openssl ];then

    run mkdir openssl

fi

run cd openssl

CS=`shasum -a 256 "openssl-$OPENSSLVERSION.tar.gz" | cut -d ' ' -f1`

if [ ! "$CS" = "$SHA256SUM" ]; then

    echo "Downloading OpenSSL Version $OPENSSLVERSION ..."

    run rm -f "openssl-$OPENSSLVERSION.tar.gz"

    run curl -o "openssl-$OPENSSLVERSION.tar.gz" https://www.openssl.org/source/openssl-$OPENSSLVERSION.tar.gz

    CS=`shasum -a 256 "openssl-$OPENSSLVERSION.tar.gz" | cut -d ' ' -f1`

    if [ ! "$CS" = "$SHA256SUM" ]; then

    echo "Download failed or invalid checksum. Have a nice day."

    exit 1

    fi

fi

# remove old build dir

run rm -rf openssltmp

run mkdir openssltmp

run cd openssltmp

echo "Unpacking OpenSSL ..."

run tar xfz "../openssl-$OPENSSLVERSION.tar.gz"

if [ ! $? = 0 ]; then

    echo "Unpacking failed."

    exit 1

fi

echo

run cd "openssl-$OPENSSLVERSION"

case `pwd` in

     *\ * )

           echo "The build path (`pwd`) contains whitepsaces - fix this."

           exit 1

          ;;

esac

# Cleanup old build artifacts

run rm -rf ../../include

run mkdir -p ../../include

run rm -rf ../../lib

run mkdir -p ../../lib

for i in ${ARCHS}; do

    buildArch $i

done

echo "Copying header files ..."

run cp -r include/ ../../include/

echo

echo "Combining to unversal binary"

run lipo -create ../../lib/libcrypto_*.a -o ../../lib/libcrypto.a

run lipo -create ../../lib/libssl_*.a -o ../../lib/libssl.a

echo "Finished. Please verify the contens of the openssl folder in \"$INSTALLDIR\""