[build] Set openssl vars explicitly; Support mbedtls Android build (#…

…2030)

scripts/build-android/build-android

@@ -6,9 +6,11 @@ echo_help()
   echo "    -n    Specify NDK root path for the build."
   echo "    -a    Select target API level."
   echo "    -t    Select target architectures."
-  echo "          Android supports the following architectures: armeabi armeabi-v7a arm64-v8a x86 x86_64."
+  echo "          Android supports the following architectures: armeabi-v7a arm64-v8a x86 x86_64."
+  echo "    -e    Encryption library to be used. Possible options: openssl (default) mbedtls"
   echo "    -o    Select OpenSSL (1.1.1 series) version. E.g. 1.1.1h"
-  echo "    -s    Select a specific SRT tag. E.g. v1.4.3"
+  echo "    -m    Select Mbed TLS version. E.g. v2.26.0"
+  echo "    -s    Select SRT version. E.g. v1.4.3"
   echo
   echo "Example: ./build-android -n /home/username/Android/Sdk/ndk/21.4.7075529 -a 28 -t \"armeabi-v7a arm64-v8a x86 x86_64\" -o 1.1.1h -s v1.4.3"
   echo
@@ -17,11 +19,13 @@ echo_help()
 # Init optional command line vars
 NDK_ROOT=""
 API_LEVEL=28
-BUILD_TARGETS="armeabi armeabi-v7a arm64-v8a x86 x86_64"
+BUILD_TARGETS="armeabi-v7a arm64-v8a x86 x86_64"
 OPENSSL_VERSION=1.1.1h
 SRT_VERSION=""
+ENC_LIB=openssl
+MBEDTLS_VERSION=v2.26.0
 
-while getopts n:a:t:o:s: option
+while getopts n:a:t:o:s:e:m: option
 do
  case "${option}"
  in
@@ -30,6 +34,8 @@ do
  t) BUILD_TARGETS=${OPTARG};;
  o) OPENSSL_VERSION=${OPTARG};;
  s) SRT_VERSION=${OPTARG};;
+ e) ENC_LIB=${OPTARG};;
+ m) MBEDTLS_VERSION=${OPTARG};;
  *) twentytwo=${OPTARG};;
  esac
 done
@@ -49,7 +55,19 @@ fi
 # Determine the path of the executing script
 BASE_DIR=$(readlink -f $0 | xargs dirname)
 
-$BASE_DIR/mkssl -n $NDK_ROOT -a $API_LEVEL -t "$BUILD_TARGETS" -o $OPENSSL_VERSION
+if [ $ENC_LIB = 'openssl' ]; then
+ $BASE_DIR/mkssl -n $NDK_ROOT -a $API_LEVEL -t "$BUILD_TARGETS" -o $OPENSSL_VERSION
+elif [ $ENC_LIB = 'mbedtls' ]; then
+ if [ ! -d $BASE_DIR/mbedtls ]; then
+  git clone https://github.com/ARMmbed/mbedtls mbedtls
+  if [ ! -z "$MBEDTLS_VERSION" ]; then
+   git -C $BASE_DIR/mbedtls checkout $MBEDTLS_VERSION
+  fi
+ fi
+else
+ echo "Unknown encryption library. Possible options: openssl mbedtls"
+ exit 128
+fi
 
 if [ ! -d $BASE_DIR/srt ]; then
  git clone https://github.com/Haivision/srt srt
@@ -58,12 +76,20 @@ if [ ! -d $BASE_DIR/srt ]; then
  fi
 fi
 
-JNI_DIR=$BASE_DIR/prebuilt
-
 for build_target in $BUILD_TARGETS; do
- git -C $BASE_DIR/srt clean -fd
- $BASE_DIR/mksrt -n $NDK_ROOT -a $API_LEVEL -t $build_target -s $BASE_DIR/srt -i $BASE_DIR/$build_target
+ LIB_DIR=$BASE_DIR/$build_target/lib
+ JNI_DIR=$BASE_DIR/prebuilt/$build_target
+
+ mkdir -p $JNI_DIR
 
- mkdir -p $JNI_DIR/$build_target
- cp $BASE_DIR/$build_target/lib/libsrt.so $JNI_DIR/$build_target/libsrt.so
+ if [ $ENC_LIB = 'mbedtls' ]; then
+  $BASE_DIR/mkmbedtls -n $NDK_ROOT -a $API_LEVEL -t $build_target -s $BASE_DIR/mbedtls -i $BASE_DIR/$build_target
+  cp $LIB_DIR/libmbedcrypto.so $JNI_DIR/libmbedcrypto.so
+  cp $LIB_DIR/libmbedtls.so $JNI_DIR/libmbedtls.so
+  cp $LIB_DIR/libmbedx509.so $JNI_DIR/libmbedx509.so
+ fi
+
+ git -C $BASE_DIR/srt clean -fd
+ $BASE_DIR/mksrt -n $NDK_ROOT -a $API_LEVEL -t $build_target -e $ENC_LIB -s $BASE_DIR/srt -i $BASE_DIR/$build_target
+ cp $LIB_DIR/libsrt.so $JNI_DIR/libsrt.so
 done

scripts/build-android/mkmbedtls

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+while getopts s:i:t:n:a: option
+do
+ case "${option}"
+ in
+ s) SRC_DIR=${OPTARG};;
+ i) INSTALL_DIR=${OPTARG};;
+ t) ARCH_ABI=${OPTARG};;
+ n) NDK_ROOT=${OPTARG};;
+ a) API_LEVEL=${OPTARG};;
+ *) twentytwo=${OPTARG};;
+ esac
+done
+
+
+BUILD_DIR=/tmp/mbedtls_android_build
+rm -rf $BUILD_DIR
+mkdir $BUILD_DIR
+cd $BUILD_DIR
+cmake -DENABLE_TESTING=Off -DUSE_SHARED_MBEDTLS_LIBRARY=On \
+-DCMAKE_PREFIX_PATH=$INSTALL_DIR -DCMAKE_INSTALL_PREFIX=$INSTALL_DIR -DCMAKE_ANDROID_NDK=$NDK_ROOT \
+-DCMAKE_SYSTEM_NAME=Android -DCMAKE_SYSTEM_VERSION=$API_LEVEL -DCMAKE_ANDROID_ARCH_ABI=$ARCH_ABI \
+-DCMAKE_C_FLAGS="-fPIC" -DCMAKE_SHARED_LINKER_FLAGS="-Wl,--build-id" \
+-DCMAKE_BUILD_TYPE=RelWithDebInfo $SRC_DIR
+cmake --build .
+cmake --install .

scripts/build-android/mksrt

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-while getopts s:i:t:n:a: option
+while getopts s:i:t:n:a:e: option
 do
  case "${option}"
  in
@@ -9,13 +9,20 @@ do
  t) ARCH_ABI=${OPTARG};;
  n) NDK_ROOT=${OPTARG};;
  a) API_LEVEL=${OPTARG};;
+ e) ENC_LIB=${OPTARG};;
  *) twentytwo=${OPTARG};;
  esac
 done
 
 
 cd $SRC_DIR
-./configure --use-openssl-pc=OFF --OPENSSL_USE_STATIC_LIBS=true \
+./configure --use-enclib=$ENC_LIB \
+--use-openssl-pc=OFF --OPENSSL_USE_STATIC_LIBS=TRUE \
+--OPENSSL_INCLUDE_DIR=$INSTALL_DIR/include \
+--OPENSSL_CRYPTO_LIBRARY=$INSTALL_DIR/lib/libcrypto.a --OPENSSL_SSL_LIBRARY=$INSTALL_DIR/lib/libssl.a \
+--STATIC_MBEDTLS=FALSE \
+--MBEDTLS_INCLUDE_DIR=$INSTALL_DIR/include --MBEDTLS_INCLUDE_DIRS=$INSTALL_DIR/include \
+--MBEDTLS_LIBRARIES=$INSTALL_DIR/lib/libmbedtls.so \
 --CMAKE_PREFIX_PATH=$INSTALL_DIR --CMAKE_INSTALL_PREFIX=$INSTALL_DIR --CMAKE_ANDROID_NDK=$NDK_ROOT \
 --CMAKE_SYSTEM_NAME=Android --CMAKE_SYSTEM_VERSION=$API_LEVEL --CMAKE_ANDROID_ARCH_ABI=$ARCH_ABI \
 --CMAKE_C_FLAGS="-fPIC" --CMAKE_SHARED_LINKER_FLAGS="-Wl,--build-id" \