Use static linking for oss-fuzz

tools/cmake/FindMbedTLS.cmake

@@ -1,8 +1,15 @@
 find_path(MBEDTLS_INCLUDE_DIRS mbedtls/ssl.h HINTS ${MBEDTLS_FOLDER_INCLUDE})
 
-find_library(MBEDTLS_LIBRARY mbedtls HINTS ${MBEDTLS_FOLDER_LIBRARY})
-find_library(MBEDX509_LIBRARY mbedx509 HINTS ${MBEDTLS_FOLDER_LIBRARY})
-find_library(MBEDCRYPTO_LIBRARY mbedcrypto HINTS ${MBEDTLS_FOLDER_LIBRARY})
+if(UA_BUILD_OSS_FUZZ)
+    # oss-fuzz requires static linking of libraries
+    set(MBEDTLS_LIBRARY /usr/lib/x86_64-linux-gnu/libmbedtls.a)
+    set(MBEDX509_LIBRARY /usr/lib/x86_64-linux-gnu/libmbedx509.a)
+    set(MBEDCRYPTO_LIBRARY /usr/lib/x86_64-linux-gnu/libmbedcrypto.a)
+else()
+    find_library(MBEDTLS_LIBRARY mbedtls HINTS ${MBEDTLS_FOLDER_LIBRARY})
+    find_library(MBEDX509_LIBRARY mbedx509 HINTS ${MBEDTLS_FOLDER_LIBRARY})
+    find_library(MBEDCRYPTO_LIBRARY mbedcrypto HINTS ${MBEDTLS_FOLDER_LIBRARY})
+endif()
 
 set(MBEDTLS_LIBRARIES "${MBEDTLS_LIBRARY}" "${MBEDX509_LIBRARY}" "${MBEDCRYPTO_LIBRARY}")