cmake_demo/test.c

#include <openssl/aes.h>

bool aes_encrypt(const char *key, const char *iv, const char *input, size_t input_len, char **output)
{
    return true;
}

bool aes_decrypt(const char *key, const char *iv, const char *input, size_t input_len, char **output)
{
    return false;
}