OpenSSL::X509::Request#public_key=

static VALUE
ossl_x509req_set_public_key(VALUE self, VALUE key)
{
    X509_REQ *req;
    EVP_PKEY *pkey;

    GetX509Req(self, req);
    pkey = GetPKeyPtr(key);
    ossl_pkey_check_public_key(pkey);
    if (!X509_REQ_set_pubkey(req, pkey))
        ossl_raise(eX509ReqError, "X509_REQ_set_pubkey");
    return key;
}