Mercurial > hg > nginx-quic
view src/event/modules/ngx_iocp_module.c @ 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 | a72886067bbb |
children | 5f5a34e83ca2 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_iocp_module.h> static ngx_int_t ngx_iocp_init(ngx_cycle_t *cycle, ngx_msec_t timer); static ngx_thread_value_t __stdcall ngx_iocp_timer(void *data); static void ngx_iocp_done(ngx_cycle_t *cycle); static ngx_int_t ngx_iocp_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t key); static ngx_int_t ngx_iocp_del_connection(ngx_connection_t *c, ngx_uint_t flags); static ngx_int_t ngx_iocp_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags); static void *ngx_iocp_create_conf(ngx_cycle_t *cycle); static char *ngx_iocp_init_conf(ngx_cycle_t *cycle, void *conf); static ngx_str_t iocp_name = ngx_string("iocp"); static ngx_command_t ngx_iocp_commands[] = { { ngx_string("iocp_threads"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, 0, offsetof(ngx_iocp_conf_t, threads), NULL }, { ngx_string("post_acceptex"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, 0, offsetof(ngx_iocp_conf_t, post_acceptex), NULL }, { ngx_string("acceptex_read"), NGX_EVENT_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, 0, offsetof(ngx_iocp_conf_t, acceptex_read), NULL }, ngx_null_command }; static ngx_event_module_t ngx_iocp_module_ctx = { &iocp_name, ngx_iocp_create_conf, /* create configuration */ ngx_iocp_init_conf, /* init configuration */ { ngx_iocp_add_event, /* add an event */ NULL, /* delete an event */ NULL, /* enable an event */ NULL, /* disable an event */ NULL, /* add an connection */ ngx_iocp_del_connection, /* delete an connection */ NULL, /* trigger a notify */ ngx_iocp_process_events, /* process the events */ ngx_iocp_init, /* init the events */ ngx_iocp_done /* done the events */ } }; ngx_module_t ngx_iocp_module = { NGX_MODULE_V1, &ngx_iocp_module_ctx, /* module context */ ngx_iocp_commands, /* module directives */ NGX_EVENT_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; ngx_os_io_t ngx_iocp_io = { ngx_overlapped_wsarecv, NULL, ngx_udp_overlapped_wsarecv, NULL, NULL, NULL, ngx_overlapped_wsasend_chain, 0 }; static HANDLE iocp; static ngx_tid_t timer_thread; static ngx_msec_t msec; static ngx_int_t ngx_iocp_init(ngx_cycle_t *cycle, ngx_msec_t timer) { ngx_iocp_conf_t *cf; cf = ngx_event_get_conf(cycle->conf_ctx, ngx_iocp_module); if (iocp == NULL) { iocp = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, cf->threads); } if (iocp == NULL) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "CreateIoCompletionPort() failed"); return NGX_ERROR; } ngx_io = ngx_iocp_io; ngx_event_actions = ngx_iocp_module_ctx.actions; ngx_event_flags = NGX_USE_IOCP_EVENT; if (timer == 0) { return NGX_OK; } /* * The waitable timer could not be used, because * GetQueuedCompletionStatus() does not set a thread to alertable state */ if (timer_thread == NULL) { msec = timer; if (ngx_create_thread(&timer_thread, ngx_iocp_timer, &msec, cycle->log) != 0) { return NGX_ERROR; } } ngx_event_flags |= NGX_USE_TIMER_EVENT; return NGX_OK; } static ngx_thread_value_t __stdcall ngx_iocp_timer(void *data) { ngx_msec_t timer = *(ngx_msec_t *) data; ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "THREAD %p %p", &msec, data); for ( ;; ) { Sleep(timer); ngx_time_update(); #if 1 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ngx_cycle->log, 0, "timer"); #endif } #if defined(__WATCOMC__) || defined(__GNUC__) return 0; #endif } static void ngx_iocp_done(ngx_cycle_t *cycle) { if (CloseHandle(iocp) == -1) { ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, "iocp CloseHandle() failed"); } iocp = NULL; } static ngx_int_t ngx_iocp_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t key) { ngx_connection_t *c; c = (ngx_connection_t *) ev->data; c->read->active = 1; c->write->active = 1; ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, "iocp add: fd:%d k:%ui ov:%p", c->fd, key, &ev->ovlp); if (CreateIoCompletionPort((HANDLE) c->fd, iocp, key, 0) == NULL) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "CreateIoCompletionPort() failed"); return NGX_ERROR; } return NGX_OK; } static ngx_int_t ngx_iocp_del_connection(ngx_connection_t *c, ngx_uint_t flags) { #if 0 if (flags & NGX_CLOSE_EVENT) { return NGX_OK; } if (CancelIo((HANDLE) c->fd) == 0) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "CancelIo() failed"); return NGX_ERROR; } #endif return NGX_OK; } static ngx_int_t ngx_iocp_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags) { int rc; u_int key; u_long bytes; ngx_err_t err; ngx_msec_t delta; ngx_event_t *ev; ngx_event_ovlp_t *ovlp; if (timer == NGX_TIMER_INFINITE) { timer = INFINITE; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "iocp timer: %M", timer); rc = GetQueuedCompletionStatus(iocp, &bytes, (PULONG_PTR) &key, (LPOVERLAPPED *) &ovlp, (u_long) timer); if (rc == 0) { err = ngx_errno; } else { err = 0; } delta = ngx_current_msec; if (flags & NGX_UPDATE_TIME) { ngx_time_update(); } ngx_log_debug4(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "iocp: %d b:%d k:%d ov:%p", rc, bytes, key, ovlp); if (timer != INFINITE) { delta = ngx_current_msec - delta; ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "iocp timer: %M, delta: %M", timer, delta); } if (err) { if (ovlp == NULL) { if (err != WAIT_TIMEOUT) { ngx_log_error(NGX_LOG_ALERT, cycle->log, err, "GetQueuedCompletionStatus() failed"); return NGX_ERROR; } return NGX_OK; } ovlp->error = err; } if (ovlp == NULL) { ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "GetQueuedCompletionStatus() returned no operation"); return NGX_ERROR; } ev = ovlp->event; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, err, "iocp event:%p", ev); if (err == ERROR_NETNAME_DELETED /* the socket was closed */ || err == ERROR_OPERATION_ABORTED /* the operation was canceled */) { /* * the WSA_OPERATION_ABORTED completion notification * for a file descriptor that was closed */ ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, err, "iocp: aborted event %p", ev); return NGX_OK; } if (err) { ngx_log_error(NGX_LOG_ALERT, cycle->log, err, "GetQueuedCompletionStatus() returned operation error"); } switch (key) { case NGX_IOCP_ACCEPT: if (bytes) { ev->ready = 1; } break; case NGX_IOCP_IO: ev->complete = 1; ev->ready = 1; break; case NGX_IOCP_CONNECT: ev->ready = 1; } ev->available = bytes; ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "iocp event handler: %p", ev->handler); ev->handler(ev); return NGX_OK; } static void * ngx_iocp_create_conf(ngx_cycle_t *cycle) { ngx_iocp_conf_t *cf; cf = ngx_palloc(cycle->pool, sizeof(ngx_iocp_conf_t)); if (cf == NULL) { return NGX_CONF_ERROR; } cf->threads = NGX_CONF_UNSET; cf->post_acceptex = NGX_CONF_UNSET; cf->acceptex_read = NGX_CONF_UNSET; return cf; } static char * ngx_iocp_init_conf(ngx_cycle_t *cycle, void *conf) { ngx_iocp_conf_t *cf = conf; ngx_conf_init_value(cf->threads, 0); ngx_conf_init_value(cf->post_acceptex, 10); ngx_conf_init_value(cf->acceptex_read, 1); return NGX_CONF_OK; }