*) ssl_verify_client ask
*) test ssl_client_certificate for ssl_verify_client
*) $ssl_client_cert adds TAB before each line except first one
*) $ssl_client_raw_cert contains certificate as is

src/http/ngx_http_request.c

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index 8dc562f..9aad1a4 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -1446,7 +1446,7 @@
 
         sscf = ngx_http_get_module_srv_conf(r, ngx_http_ssl_module);
 
-        if (sscf->verify) {
+        if (sscf->verify == 1) {
             rc = SSL_get_verify_result(c->ssl->connection);
 
             if (rc != X509_V_OK) {