Add OpenSSL and libcurl libraries

Enables support for NSURLSession in GNUstep Base.

Author: triplef

README.md

@@ -11,7 +11,7 @@ The toolchain is built using the Android NDK (installed e.g. via [Android Studio
 Libraries
 ---------
 
-The toolchain currently compiles the following libraries for Android:
+The toolchain consists of the following libraries:
 
 * [GNUstep Base Library](https://github.com/gnustep/libs-base) (Foundation)
 * [GNUstep CoreBase Library](https://github.com/gnustep/libs-corebase) (CoreFoundation)
@@ -21,6 +21,8 @@ The toolchain currently compiles the following libraries for Android:
 * [libiconv](https://www.gnu.org/software/libiconv/)
 * [libxml2](https://github.com/GNOME/libxml2)
 * [libxslt](https://github.com/GNOME/libxslt)
+* [libcurl](https://github.com/curl/curl)
+* [OpenSSL](https://github.com/KDAB/android_openssl)
 * [ICU](https://github.com/unicode-org/icu)
 
 

patches/gnustep-base-curl-cacert.patch

@@ -0,0 +1,48 @@
+diff --git a/Source/GSEasyHandle.m b/Source/GSEasyHandle.m
+index 576a41205..7eb15d512 100644
+--- a/Source/GSEasyHandle.m
++++ b/Source/GSEasyHandle.m
+@@ -173,6 +173,24 @@ @implementation GSEasyHandle
+   struct curl_slist          *_headerList;
+ }
+ 
++#ifdef __ANDROID__
++static NSData *CABundleData() {
++  static NSData *result = nil;
++  static dispatch_once_t predicate;
++
++  dispatch_once(&predicate, ^{
++    NSString *caBundlePath = [[NSBundle mainBundle] pathForResource:@"cacert" ofType:@"pem"];
++    if (caBundlePath) {
++      result = [[NSData alloc] initWithContentsOfFile:caBundlePath];
++    } else {
++      NSLog(@"Warning: missing CA bundle path (cacert.pem) in app bundle");
++    }
++  });
++
++  return result;
++}
++#endif
++
+ - (instancetype) initWithDelegate: (id<GSEasyHandleDelegate>)delegate 
+ {
+   if (nil != (self = [super init])) 
+@@ -184,6 +202,18 @@ - (instancetype) initWithDelegate: (id<GSEasyHandleDelegate>)delegate
+       _errorBuffer = memset(eb, 0, sizeof(char) * (CURL_ERROR_SIZE + 1));
+       
+       [self setupCallbacks];
++
++#ifdef __ANDROID__
++      // set CA certificate store (must be stored in app bundle)
++      NSData *caBundleData = CABundleData();
++      if (caBundleData) {
++        struct curl_blob blob;
++        blob.data = (void *)caBundleData.bytes;
++        blob.len = caBundleData.length;
++        blob.flags = CURL_BLOB_COPY;
++        handleEasyCode(curl_easy_setopt(_rawHandle, CURLOPT_CAINFO_BLOB, &blob));
++      }
++#endif
+     }
+ 
+   return self;

phases/18-openssl.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+set -e # make any subsequent failing command exit the script
+
+. `dirname $0`/../scripts/common.sh
+
+PROJECT=openssl
+GITHUB_REPO=KDAB/android_openssl
+OPENSSL_VERSION=1.1
+
+# load environment and prepare project
+if ! prepare_project $PROJECT $GITHUB_REPO; then
+  exit 0
+fi
+
+case $ABI_NAME in
+  armeabi-v7a)
+    ABI_FOLDER=arm
+    ;;
+  arm64-v8a)
+    ABI_FOLDER=arm64
+    ;;
+  *)
+    ABI_FOLDER=$ABI_NAME
+esac
+
+echo -e "\n### Installing headers"
+
+cp -Rf no-asm/static/include/ ${INSTALL_PREFIX}/include
+
+echo -e "\n### Installing libraries"
+
+cp -f latest/$ABI_FOLDER/*.so ${INSTALL_PREFIX}/lib
+
+# create version-less symlinks for libcrypto/libssl.so to versioned libraries
+libraries=`ls latest/$ABI_FOLDER/*.so`
+cd ${INSTALL_PREFIX}/lib
+for lib in $libraries; do
+  libname=`basename $lib`
+  if [[ $libname =~ ([a-z]+)[0-9\_]+.so ]]; then
+    ln -sf $libname ${BASH_REMATCH[1]}.so
+  fi
+done
+
+echo -e "\n### Downloading CA bundle (must be installed into Android app bundle)"
+mkdir -p "$CACHE_ROOT"
+cd "$CACHE_ROOT"
+ETAG="cacert-etag.txt"
+[ -f $ETAG ] && ETAG_COMPARE="--etag-compare $ETAG"
+curl --show-error --fail-with-body --remote-name --etag-save $ETAG $ETAG_COMPARE https://curl.se/ca/cacert.pem
+mkdir -p ${INSTALL_PREFIX}/etc/ssl/
+cp -f cacert.pem ${INSTALL_PREFIX}/etc/ssl/

phases/19-libcurl.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+set -e # make any subsequent failing command exit the script
+
+. `dirname $0`/../scripts/common.sh
+
+PROJECT=libcurl
+GITHUB_REPO=curl/curl
+
+# load environment and prepare project
+if ! prepare_project $PROJECT $GITHUB_REPO; then
+  exit 0
+fi
+
+. "$ROOT_DIR"/scripts/toolchain.sh
+
+echo -e "\n### Running cmake"
+mkdir -p build-${ABI_NAME}
+cd build-${ABI_NAME}
+
+${CMAKE} .. \
+  ${CMAKE_OPTIONS} \
+  -DBUILD_SHARED_LIBS=YES \
+  -DBUILD_CURL_EXE=NO \
+  -DCURL_CA_BUNDLE=NONE `# disable CA bundle path, needs to be read at runtime from app bundle` \
+  -DCMAKE_FIND_ROOT_PATH=${INSTALL_PREFIX} `# make CMake look for OpenSSL in installation directory` \
+
+echo -e "\n### Building"
+make -j${MAKE_JOBS}
+
+echo -e "\n### Installing"
+make install