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view src/stream/ngx_stream_upstream.h @ 7360:8f25a44d9add
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 | d27aa9060c95 |
children | 860d3907da1c |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_STREAM_UPSTREAM_H_INCLUDED_ #define _NGX_STREAM_UPSTREAM_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> #include <ngx_event_connect.h> #define NGX_STREAM_UPSTREAM_CREATE 0x0001 #define NGX_STREAM_UPSTREAM_WEIGHT 0x0002 #define NGX_STREAM_UPSTREAM_MAX_FAILS 0x0004 #define NGX_STREAM_UPSTREAM_FAIL_TIMEOUT 0x0008 #define NGX_STREAM_UPSTREAM_DOWN 0x0010 #define NGX_STREAM_UPSTREAM_BACKUP 0x0020 #define NGX_STREAM_UPSTREAM_MAX_CONNS 0x0100 #define NGX_STREAM_UPSTREAM_NOTIFY_CONNECT 0x1 typedef struct { ngx_array_t upstreams; /* ngx_stream_upstream_srv_conf_t */ } ngx_stream_upstream_main_conf_t; typedef struct ngx_stream_upstream_srv_conf_s ngx_stream_upstream_srv_conf_t; typedef ngx_int_t (*ngx_stream_upstream_init_pt)(ngx_conf_t *cf, ngx_stream_upstream_srv_conf_t *us); typedef ngx_int_t (*ngx_stream_upstream_init_peer_pt)(ngx_stream_session_t *s, ngx_stream_upstream_srv_conf_t *us); typedef struct { ngx_stream_upstream_init_pt init_upstream; ngx_stream_upstream_init_peer_pt init; void *data; } ngx_stream_upstream_peer_t; typedef struct { ngx_str_t name; ngx_addr_t *addrs; ngx_uint_t naddrs; ngx_uint_t weight; ngx_uint_t max_conns; ngx_uint_t max_fails; time_t fail_timeout; ngx_msec_t slow_start; ngx_uint_t down; unsigned backup:1; NGX_COMPAT_BEGIN(4) NGX_COMPAT_END } ngx_stream_upstream_server_t; struct ngx_stream_upstream_srv_conf_s { ngx_stream_upstream_peer_t peer; void **srv_conf; ngx_array_t *servers; /* ngx_stream_upstream_server_t */ ngx_uint_t flags; ngx_str_t host; u_char *file_name; ngx_uint_t line; in_port_t port; ngx_uint_t no_port; /* unsigned no_port:1 */ #if (NGX_STREAM_UPSTREAM_ZONE) ngx_shm_zone_t *shm_zone; #endif }; typedef struct { ngx_msec_t response_time; ngx_msec_t connect_time; ngx_msec_t first_byte_time; off_t bytes_sent; off_t bytes_received; ngx_str_t *peer; } ngx_stream_upstream_state_t; typedef struct { ngx_str_t host; in_port_t port; ngx_uint_t no_port; /* unsigned no_port:1 */ ngx_uint_t naddrs; ngx_resolver_addr_t *addrs; struct sockaddr *sockaddr; socklen_t socklen; ngx_str_t name; ngx_resolver_ctx_t *ctx; } ngx_stream_upstream_resolved_t; typedef struct { ngx_peer_connection_t peer; ngx_buf_t downstream_buf; ngx_buf_t upstream_buf; ngx_chain_t *free; ngx_chain_t *upstream_out; ngx_chain_t *upstream_busy; ngx_chain_t *downstream_out; ngx_chain_t *downstream_busy; off_t received; time_t start_sec; ngx_uint_t requests; ngx_uint_t responses; ngx_str_t ssl_name; ngx_stream_upstream_srv_conf_t *upstream; ngx_stream_upstream_resolved_t *resolved; ngx_stream_upstream_state_t *state; unsigned connected:1; unsigned proxy_protocol:1; } ngx_stream_upstream_t; ngx_stream_upstream_srv_conf_t *ngx_stream_upstream_add(ngx_conf_t *cf, ngx_url_t *u, ngx_uint_t flags); #define ngx_stream_conf_upstream_srv_conf(uscf, module) \ uscf->srv_conf[module.ctx_index] extern ngx_module_t ngx_stream_upstream_module; #endif /* _NGX_STREAM_UPSTREAM_H_INCLUDED_ */