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annotate src/core/ngx_syslog.h @ 7360:8f25a44d9add

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SSL: logging level of "no suitable key share". The "no suitable key share" errors are reported by OpenSSL 1.1.1 when using TLSv1.3 if there are no shared groups (that is, elliptic curves). In particular, it is easy enough to trigger by using only a single curve in ssl_ecdh_curve: ssl_ecdh_curve secp384r1; and using a different curve in the client: openssl s_client -connect 127.0.0.1:443 -curves prime256v1 On the client side it is seen as "sslv3 alert handshake failure", "SSL alert number 40": 0:error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure:ssl/record/rec_layer_s3.c:1528:SSL alert number 40 It can be also triggered with default ssl_ecdh_curve by using a curve which is not in the default list (X25519, prime256v1, X448, secp521r1, secp384r1): openssl s_client -connect 127.0.0.1:8443 -curves brainpoolP512r1 Given that many clients hardcode prime256v1, these errors might become a common problem with TLSv1.3 if ssl_ecdh_curve is redefined. Previously this resulted in not using ECDH with such clients, but with TLSv1.3 it is no longer possible and will result in a handshake failure. The SSL_R_NO_SHARED_GROUP error is what BoringSSL returns in the same situation. Seen at: https://serverfault.com/questions/932102/nginx-ssl-handshake-error-no-suitable-key-share
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 25 Sep 2018 13:59:53 +0300
parents 7f9935f07fe9
children 29adacffdefa
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777202558122 Added syslog support for error_log and access_log directives.
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1
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2 /*
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3 * Copyright (C) Nginx, Inc.
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4 */
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7 #ifndef _NGX_SYSLOG_H_INCLUDED_
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8 #define _NGX_SYSLOG_H_INCLUDED_
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11 typedef struct {
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12 ngx_uint_t facility;
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13 ngx_uint_t severity;
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14 ngx_str_t tag;
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16 ngx_addr_t server;
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17 ngx_connection_t conn;
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a6a2016b8e31 Syslog: added "nohostname" option.
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18 unsigned busy:1;
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19 unsigned nohostname:1;
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20 } ngx_syslog_peer_t;
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23 char *ngx_syslog_process_conf(ngx_conf_t *cf, ngx_syslog_peer_t *peer);
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24 u_char *ngx_syslog_add_header(ngx_syslog_peer_t *peer, u_char *buf);
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25 void ngx_syslog_writer(ngx_log_t *log, ngx_uint_t level, u_char *buf,
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26 size_t len);
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27 ssize_t ngx_syslog_send(ngx_syslog_peer_t *peer, u_char *buf, size_t len);
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30 #endif /* _NGX_SYSLOG_H_INCLUDED_ */