How to link OpenSSL libraries in CMake Qt Android app?

advm

I have tried several options but still didn't link the libraries successfully.
I have Qt Android CMake application and I need to link the libssl and libcrypto libraries because I am making HTTPS requests to server.
I have placed them in the poject /android_openssl/ANDROID_ABI/lib/ and for each ABI i have this:

And also the include folder is next to the abi folders.
I have tried this solutions but I end up without this libraries to be linked:

This one does not link and there is no error but the libraries are not linked and the data is not received from server:

add_library(crypto SHARED IMPORTED)
set_property(TARGET crypto PROPERTY IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/android_openssl/${ANDROID_ABI}/lib/libcrypto.so)

add_library(ssl SHARED IMPORTED)
set_property(TARGET ssl PROPERTY IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/android_openssl/${ANDROID_ABI}/lib/libssl.so)

and this solution also does not work:

set(OPENSSL_LIBS
    ${CMAKE_CURRENT_SOURCE_DIR}/android_openssl/${ANDROID_ABI}/lib/libcrypto.so
    ${CMAKE_CURRENT_SOURCE_DIR}/android_openssl/${ANDROID_ABI}/lib/libssl.so
)

find_library(OPENSSL_LIBS crypto ssl)

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/android_openssl/include)

add_library(OPENSSL_LIBS SHARED IMPORTED)

add_library(MyApp SHARED
    ${PROJECT_SOURCES}
    ${PROJECT_HEADERS}
    ${PROJECT_RESOURCES}
    )

target_compile_definitions(MyApp
  PRIVATE $<$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>:QT_QML_DEBUG>)

target_link_libraries(MyApp
  PRIVATE
  Qt5::Core
  Qt5::Quick
  Qt5::QuickControls2
  Qt5::Sql
  Qt5::Network
  Qt5::Svg
  ${OPENSSL_LIBS}
)

With this solution I got this error on build:

ninja: error: '/home/user/QtProjects/Test/MyApp/android_openssl/x86/lib/libcrypto.so', needed by 'android-build/libs/x86/libMyApp_x86.so', missing and no known rule to make it

Can you please tell me what I am doing wrong? I have found so much resources on this topic but still I am doing something wrong.

Also, I see that here I have static libraries for each abi .a and also I see .so.1.1. So which one I should link?

piervalli

I used for qmake this wiki, but there is a example for cmake.

https://doc.qt.io/qt-5/android-openssl-support.html

In Windows Qt creator download the library in this path

C:\Users{current user}\AppData\Local\Android\Sdk\android_openssl

piervalli

This post is deleted!

advm

I tried also this :

add_library(ssl STATIC IMPORTED)
add_library(crypto STATIC IMPORTED)


    set_target_properties(ssl PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/android_openssl/${ANDROID_ABI}/lib/libssl.a)
    set_target_properties(crypto PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/android_openssl/${ANDROID_ABI}/lib/libcrypto.a)

    add_library(MyApp SHARED
        ${PROJECT_SOURCES}
        ${PROJECT_HEADERS}
        ${PROJECT_RESOURCES}
        )

target_link_libraries(MyApp
  PRIVATE
  ssl
  crypto
  Qt5::Core
  Qt5::Quick
  Qt5::QuickControls2
  Qt5::Sql
  Qt5::Network
  Qt5::Svg
)

and this should link properly the static libraries but when I make HTTPS requests in the application I am getting now this error:

E linker  : library "/system/lib/libcrypto.so" ("/system/lib/libcrypto.so") needed or dlopened by "/data/app/~~Xp7o_GB4MNRnsRrBx8X1Pw==/org.qtproject.example-VZ3Vyyfp8FGD1_RYb2Soug==/lib/x86/libQt5Core_x86.so" is not accessible for the namespace: [name="classloader-namespace", ld_library_paths="", default_library_paths="/data/app/~~Xp7o_GB4MNRnsRrBx8X1Pw==/org.qtproject.example-VZ3Vyyfp8FGD1_RYb2Soug==/lib/x86:/data/app/~~Xp7o_GB4MNRnsRrBx8X1Pw==/org.qtproject.example-VZ3Vyyfp8FGD1_RYb2Soug==/base.apk!/lib/x86", permitted_paths="/data:/mnt/expand:/data/user/0/org.qtproject.example"]
W libMyApp_x86.so: qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed

I saw other example here on the forum that this error is when libcrypto ans libssl are not linked, but I don't know why I am still getting this error.

piervalli

I used for qmake this wiki, but there is a example for cmake.

https://doc.qt.io/qt-5/android-openssl-support.html

In Windows Qt creator download the library in this path

C:\Users{current user}\AppData\Local\Android\Sdk\android_openssl

advm

@piervalli thank you so much for the provided links, this worked for me