tests/external_override: Add override test for internal implementations

This adds a test to check if the internal implementation is not used
when it is not supposed to be used.

To be able to override functions using LD_PRELOAD, a shared version of
the torture library was added, as well as a shared library for each
of the algorithms implemented internally (ChaCha20, Poly1305,
curve25519, and ed25519).

Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 208d62dd..44d4f201 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -12,6 +12,7 @@ include_directories(${OPENSSL_INCLUDE_DIR}
                     ${libssh_BINARY_DIR}/include
                     ${libssh_BINARY_DIR}
                     ${libssh_SOURCE_DIR}/src
+                    ${CMAKE_SOURCE_DIR}/include
                     ${CMAKE_CURRENT_SOURCE_DIR}
                     ${CMAKE_BINARY_DIR}/tests)
 
@@ -32,6 +33,50 @@ target_compile_options(${TORTURE_LIBRARY} PRIVATE
                        -DSSH_PING_EXECUTABLE="${CMAKE_CURRENT_BINARY_DIR}/ssh_ping"
 )
 
+# The shared version of the library is only useful when client testing is
+# enabled
+if (CLIENT_TESTING)
+    # create shared test library
+    set(TORTURE_SHARED_LIBRARY torture_shared)
+
+    if (MINGW)
+        set(USE_ATTRIBUTE_WEAK "-DUSE_ATTRIBUTE_WEAK")
+    endif ()
+
+    # Create a list of symbols that should be wrapped for override test
+    set(WRAP_SYMBOLS "")
+    list(APPEND WRAP_SYMBOLS
+         "-Wl,--wrap=chacha_keysetup"
+         "-Wl,--wrap=chacha_ivsetup"
+         "-Wl,--wrap=chacha_encrypt_bytes")
+    list(APPEND WRAP_SYMBOLS "-Wl,--wrap=poly1305_auth")
+    list(APPEND WRAP_SYMBOLS
+         "-Wl,--wrap=crypto_sign_ed25519_keypair"
+         "-Wl,--wrap=crypto_sign_ed25519"
+         "-Wl,--wrap=crypto_sign_ed25519_open")
+    list(APPEND WRAP_SYMBOLS
+         "-Wl,--wrap=crypto_scalarmult_base"
+         "-Wl,--wrap=crypto_scalarmult")
+
+    add_library(${TORTURE_SHARED_LIBRARY}
+                SHARED
+                    cmdline.c
+                    torture.c
+                    torture_key.c
+                    torture_pki.c
+                    torture_cmocka.c
+               )
+    target_link_libraries(${TORTURE_SHARED_LIBRARY}
+                          ${CMOCKA_LIBRARY}
+                          ssh::static
+                          ${WRAP_SYMBOLS}
+                         )
+    target_compile_options(${TORTURE_SHARED_LIBRARY} PRIVATE
+                           -DSSH_PING_EXECUTABLE="${CMAKE_CURRENT_BINARY_DIR}/ssh_ping"
+                           ${USE_ATTRIBUTE_WEAK}
+    )
+endif ()
+
 if (ARGP_LIBRARY)
     target_link_libraries(${TORTURE_LIBRARY}
         ${ARGP_LIBRARY}
@@ -259,6 +304,9 @@ endif ()
 
 if (CLIENT_TESTING)
     add_subdirectory(client)
+
+    # Only add override testing if testing the client
+    add_subdirectory(external_override)
 endif ()
 
 if (WITH_SERVER AND SERVER_TESTING)