get version from OpenSSL in CMakeLists.txt

Signed-off-by: Fs <[email protected]>

CMakeLists.txt

@@ -2,15 +2,34 @@
 
 cmake_minimum_required(VERSION 3.22)
 
+set(OPENSSL_VERSION_DAT_REGEX "([A-Z_]+)=(.*)")
+file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/openssl/VERSION.dat" OPENSSL_VERSION_DAT)
+
+foreach (i IN LISTS OPENSSL_VERSION_DAT)
+    if (i MATCHES "([A-Z_]+)=(.*)")
+        set("OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}" "${CMAKE_MATCH_2}")
+        string(LENGTH "${OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}}" "OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_LENGTH")
+        if (OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_LENGTH GREATER_EQUAL 2)
+            string(SUBSTRING "${OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}}" 0 1 "OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_STARTSWITH")
+            math(EXPR "OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_LENGTH1" "${OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_LENGTH} - 1")
+            string(SUBSTRING "${OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}}" "${OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_LENGTH1}" -1 "OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_ENDSWITH")
+            if ( ( OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_STARTSWITH STREQUAL "\"" ) AND ( OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_ENDSWITH STREQUAL "\"" ) )
+                math(EXPR "OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_LENGTH2" "${OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_LENGTH} - 2")
+                string(SUBSTRING "${OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}}" 1 "${OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_LENGTH2}" "OPENSSL_VERSION_DAT_${CMAKE_MATCH_1}_STR")
+            endif()
+        endif()
+    endif()
+endforeach()
+
 project(OpenSSL
-    VERSION 3.0.12
+    VERSION "${OPENSSL_VERSION_DAT_MAJOR}.${OPENSSL_VERSION_DAT_MINOR}.${OPENSSL_VERSION_DAT_PATCH}"
     DESCRIPTION "TLS/SSL and crypto library"
     HOMEPAGE_URL "https://www.openssl.org/"
     LANGUAGES C CXX
 )
 
 # for generating opensslv.h
-set(OPENSSL_RELEASE_DATE "24 Oct 2023")
+set(OPENSSL_RELEASE_DATE "${OPENSSL_VERSION_DAT_RELEASE_DATE_STR}")
 
 if (PROJECT_VERSION_MAJOR LESS 3)
     set(OPENSSL_VERSION_PRE3_SUFFICES