Found cryptography library that was very easy to install.

Have hashing and verification functs ready.

CMakeLists.txt

@@ -19,6 +19,8 @@ add_executable(park
         headers/Park_spot.h
         Park_time.cpp
         headers/Park_time.h
+        encrypt.cpp
+        headers/encrypt.h
  )
 
 
@@ -30,6 +32,7 @@ if (UNIX)
         sqlite3
         pthread
         dl 
+        libsodium
         )
 elseif (MSYS OR MINGW) 
         target_link_libraries(park
@@ -37,6 +40,7 @@ elseif (MSYS OR MINGW)
         sqlite3
         pthread
         ssp 
+        libsodium
         )
 endif()