Jostle Support for Windows

[Ali-Sayedsalehi]

We have been building jostle on Windows. I will share our build steps below in case it helps others build it on Windows.

Update to CMakeLists.txt:

    elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Windows")

    #
    # Windows
    #
    SET(OPTIONS "-O2")
    SET(OPEN_SSL_LIB "${OPENSSL_PREFIX}/lib64/libcrypto.lib")
    SET(OPEN_SSL_DLL "${OPENSSL_PREFIX}/lib64/libcrypto-3-x64.dll")
    SET(INSTALL_PATH "${JAVA_PRJ_HOME}/jostle/src/main/resources/native/windows/amd64/")
    SET(JNI_INCLUDE "${JAVA_HOME}/include/" "${JAVA_HOME}/include/win32" "${JAVA_PRJ_HOME}/jostle/build/generated/sources/headers/java/main")

    add_library(interface_jni SHARED
            jni/native_info_jni.c
            jni/open_ssl_jni.c
            jni/block_cipher_ni_jni.c
            jni/spec_ni_jni.c
            jni/mldsa_ni_jni.c
            jni/slhdsa_ni_jni.c
            jni/mlkem_ni_jni.c
            jni/asn1_ni_jni.c
            util/mldsa.h
            util/mldsa.c
            util/slhdsa.h
            util/slhdsa.c
            util/mlkem.h
            util/mlkem.c
            util/encapdecap.h
            util/encapdecap.c
            util/block_cipher_ctx.h
            util/block_cipher_ctx.c
            util/ctr_u128_t.h
            util/ctr_u128_t.c
            util/bc_err_codes.h
            util/key_spec.c
            util/key_spec.h
            jni/byte_array_critical.c
            jni/byte_array_critical.h
            jni/bytearrays.c
            jni/bytearrays.h
            util/asn1_util.c
            util/asn1_util.h
            util/ops.h
            util/ops.c
            jni/ops.c
    )

    target_include_directories(interface_jni PUBLIC "${OPENSSL_PREFIX}/include" "${JNI_INCLUDE}")
    target_link_libraries(interface_jni PUBLIC "${OPEN_SSL_LIB}")
    target_compile_options(interface_jni PRIVATE /W4 /O2)
    if (DEFINED ENV{JOSTLE_OPS_TEST})
        target_compile_definitions(interface_jni PUBLIC JOSTLE_OPS)
    endif ()

    add_library(interface_ffi SHARED
            ffi/ffi.h
            ffi/ffi.c
            ffi/types.h
            ffi/native_info_ffi.h
            ffi/native_info_ffi.c
            ffi/openssl_ffi.h
            ffi/openssl_ffi.c
            ffi/block_cipher_ni_ffi.c
            ffi/spec_ni_ffi.c
            ffi/mldsa_ni_ffi.c
            ffi/mlkem_ni_ffi.c
            ffi/slh_dsa_ni_ffi.c
            ffi/asn1_ni_ffi.c
            util/mldsa.h
            util/mldsa.c
            util/slhdsa.h
            util/slhdsa.c
            util/mlkem.h
            util/mlkem.c
            util/encapdecap.h
            util/encapdecap.c
            util/block_cipher_ctx.h
            util/block_cipher_ctx.c
            util/ctr_u128_t.h
            util/ctr_u128_t.c
            util/bc_err_codes.h
            util/key_spec.c
            util/key_spec.h
            util/asn1_util.c
            util/asn1_util.h
            util/ops.h
            util/ops.c
    )

    set_target_properties(interface_ffi PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON)

    target_include_directories(interface_ffi PUBLIC "${OPENSSL_PREFIX}/include")
    target_link_libraries(interface_ffi PUBLIC "${OPEN_SSL_LIB}")
    target_compile_options(interface_ffi PRIVATE /W4 /O2)
    if (DEFINED ENV{JOSTLE_OPS_TEST})
        target_compile_definitions(interface_ffi PUBLIC JOSTLE_OPS)
    endif ()

    install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/loading/native" DESTINATION "${JAVA_PRJ_HOME}/jostle/src/main/resources")
    install(TARGETS interface_jni RUNTIME DESTINATION ${INSTALL_PATH})
    install(TARGETS interface_ffi RUNTIME DESTINATION ${INSTALL_PATH})
    install(FILES "${OPEN_SSL_DLL}" DESTINATION ${INSTALL_PATH})

endif ()

Changes to interface/loading/native/resolutions.txt:

#
# Windows amd64
#
"^Windows.*" "^amd64" "/native/windows/amd64"

We also add this file:
interface/loading/native/windows/amd64/deps.txt

OSSL:libcrypto-3-x64.dll

JNI:interface_jni.dll
FFI:interface_ffi.dll

How we build native libraries:

cd interface
mkdir build
cd build
cmake  -DCMAKE_BUILD_TYPE=Release -G "Ninja" -DCMAKE_C_COMPILER=clang-cl ..
cmake --build . --config Release
cmake --install . --config Release

Dumpinfo:

DumpInfo

Provider:
  Info: Jostle Provider for OpenSSL v1.0.0-SNAPSHOT
  Name: JSL
  OS: Windows 11
  Version: 10.0
  Arch: amd64
  Java Version: 25
  Java Vendor: Eclipse Adoptium

Loader:
  Load Attempted: true
  Load Successful: true
  Loader Message: Loader Finished Successfully
  Loader Interface Resolution Strategy: auto
  Loader Interface: FFI
  Loaded Native Libraries:
    Extracted: /native/windows/amd64/libcrypto-3-x64.dll
    Extracted: /native/windows/amd64/interface_ffi.dll

Native Status:
  Native Available: true
  OpenSSL Version: 3.6.0-dev
.END
Use: -fine to emit FINE level logs

[Ali-Sayedsalehi]

With the latest fixes like this and some changes to the build process, the jostle build for windows works great now and passes all the default unit tests. I have updated my original message that explains the steps for the build.