Compile Error

[chinyutwo 1]

cmd_general.cpp: In function 'void do_in_game_mall(LPCHARACTER, const char*, int, int)':
cmd_general.cpp:2366:3: error: 'MD5_CTX' was not declared in this scope
   MD5_CTX ctx;
   ^
cmd_general.cpp:2371:12: error: 'ctx' was not declared in this scope
   MD5Init(&ctx);
            ^
cmd_general.cpp:2371:15: error: 'MD5Init' was not declared in this scope
   MD5Init(&ctx);
               ^
cmd_general.cpp:2372:59: error: 'MD5Update' was not declared in this scope
   MD5Update(&ctx, (const unsigned char *) buf, strlen(buf));
                                                           ^
cmd_general.cpp:2374:19: error: 'MD5End' was not declared in this scope
   MD5End(&ctx, sas);
                   ^