load_pubkey.cc

// loads in the pubkey
int load_pubkey(std::string pubkey)
{
    FILE *fp;

    // load in the keys
    fp = fopen(pubkey.c_str(), "r");
    if (!fp) {
        return -1;
    }

    publickey = PEM_read_EC_PUBKEY(fp, NULL, NULL, NULL);
    if (!publickey) {
        ERR_print_errors_fp(stderr);
        return -1;
    }

    evp_verify_key = EVP_PKEY_new();

    int ret;

    ret = EVP_PKEY_assign_EC_KEY(evp_verify_key, publickey);
    if (ret != 1) {
        ERR_print_errors_fp(stderr);
        return -1;
    }

    fclose(fp);

    std::cout << "pubkey load ok" << std::endl;

    return 0;
}