Search code examples
c++hyperlinkopensslaes

LINK Error when trying to use OpenSSL evp aes 256 c++

i have a lot of LINK error when i'm trying to use the evp aes encryption template code from OpenSSL documentation : https://wiki.openssl.org/index.php/EVP_Symmetric_Encryption_and_Decryption

I have this type of error when i try to compile :

libcrypto.lib(b_sock.obj) : error LNK2019: symbole externe non résolu __imp__ioctlsocket@12 référencé dans la fonction _BIO_socket_ioctl

libcrypto.lib(b_sock.obj) : error LNK2019: symbole externe non résolu __imp__getsockname@12 référencé dans la fonction _BIO_sock_info

I include my lib file (libcrypto.lib) and all headers files. Other code without evp work.

I'm developping on Clion with Visual Studio compiler (C++ 17)

Solution

  • Those missing symbols are provided by the windows ws2_32 library. This is documented, for example, at the bottom of the documentation page of the ioctlsocket function. To resolve those symbols, you have to add ws2_32.lib as a dependency to your project.

    You may have to add more libraries, as briefly mentioned in the OpenSSL note NOTES.WIN.