# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1678303313 -10800
# Node ID 69c7df4fe5d3f5943325b45056b18c6226db1245
# Parent  a10210a45c8b6e6bb75e98b2fd64a80c184ae247
SSL: switched to detect log level based on the last error.

In some cases there might be multiple errors in the OpenSSL error queue,
notably when a libcrypto call fails, and then the SSL layer generates
an error itself.  For example, the following errors were observed
with OpenSSL 3.0.8 with TLSv1.3 enabled:

SSL_do_handshake() failed (SSL: error:02800066:Diffie-Hellman routines::invalid public key error:0A000132:SSL routines::bad ecpoint)
SSL_do_handshake() failed (SSL: error:08000066:elliptic curve routines::invalid encoding error:0A000132:SSL routines::bad ecpoint)
SSL_do_handshake() failed (SSL: error:0800006B:elliptic curve routines::point is not on curve error:0A000132:SSL routines::bad ecpoint)

In such cases it seems to be better to determine logging level based on
the last error in the error queue (the one added by the SSL layer,
SSL_R_BAD_ECPOINT in all of the above example example errors).  To do so,
the ngx_ssl_connection_error() function was changed to use
ERR_peek_last_error().

diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -3389,7 +3389,7 @@ ngx_ssl_connection_error(ngx_connection_
 
     } else if (sslerr == SSL_ERROR_SSL) {
 
-        n = ERR_GET_REASON(ERR_peek_error());
+        n = ERR_GET_REASON(ERR_peek_last_error());
 
             /* handshake failures */
         if (n == SSL_R_BAD_CHANGE_CIPHER_SPEC                        /*  103 */