$ gcc -o code getCode.o main.o -lssl
getCode.o: In function `getCode':
getCode.c:(.text+0x14b): undefined reference to `EVP_MD_CTX_init'
getCode.c:(.text+0x150): undefined reference to `EVP_md5'
getCode.c:(.text+0x16a): undefined reference to `EVP_DigestInit_ex'
getCode.c:(.text+0x1a8): undefined reference to `EVP_DigestUpdate'
getCode.c:(.text+0x1c7): undefined reference to `EVP_DigestFinal_ex'
getCode.c:(.text+0x1d5): undefined reference to `EVP_MD_CTX_cleanup'
collect2: ld returned 1 exit status