openssl SSL_get_verify_result返回错误20

Question

我正在编写一个使用SSL连接的C++程序。证书链通过以下方式签出：

openssl验证-cafile test.pem private.pem

if ( !SSL_CTX_load_verify_locations( ctx, "c:/Certs/test.pem", NULL ) ) {
    // Failure message and cleanup goes here.
}

SSL* ssl;
BIO* bio = BIO_new_ssl_connect( ctx );
BIO_get_ssl( bio, &ssl );
SSL_set_mode( ssl, SSL_MODE_AUTO_RETRY );

BIO_set_conn_hostname( bio, "url.com:https" );

if ( BIO_do_connect( bio ) <= 0 ) {
    // Failure message and cleanup goes here.
}

if ( SSL_get_verify_result( ssl ) != X509_V_OK ){
    // Here is where I get the error 20...
    // Free all resources and exit.
}

我需要帮助确定问题和如何解决它。我确信我的证书是正确的。

Answer 1

证书或证书链似乎不受信任。在尝试连接之前，您可以使用以下命令从pem文件加载您自己的文件：

int rc = SSL_CTX_load_verify_locations(ssl_context, file_name, NULL);
if (rc != 1) { // verify authentication result
        g_warning("Load of certificates failed!: %s", X509_verify_cert_error_string(ERR_get_error()));
        return FALSE;
}

另外，您可以直接从内存加载。

像这样的东西：

char *chain_certs = "------- BEGIN CERTIFICAT...."; /// <<< YOUR CERTIFICATE CHAIN
// Load chain of certs
X509 *cacert=NULL;
BIO *mem = BIO_new_mem_buf(chain_certs,strlen(chain_certs));
X509_STORE *cert_store = SSL_CTX_get_cert_store(ssl_context);

if(cert_store!=NULL){
    int index = 0;
    while ((cacert = PEM_read_bio_X509(mem, NULL, 0, NULL))!=NULL) {
        if(cacert) {
            g_debug("Our certificate name is %s", cacert->name);
            X509_STORE_add_cert(cert_store, cacert);
            X509_free(cacert);
            cacert=NULL;
        } /* Free immediately */
        index++;
    }
}
BIO_free(mem);