Mercurial > hg > nginx-quic
view src/mail/ngx_mail_core_module.c @ 6982:ac9b1df5b246
SSL: disabled renegotiation detection in client mode.
CVE-2009-3555 is no longer relevant and mitigated by the renegotiation
info extension (secure renegotiation). On the other hand, unexpected
renegotiation still introduces potential security risks, and hence we do
not allow renegotiation on the server side, as we never request renegotiation.
On the client side the situation is different though. There are backends
which explicitly request renegotiation, and disabled renegotiation
introduces interoperability problems. This change allows renegotiation
on the client side, and fixes interoperability problems as observed with
such backends (ticket #872).
Additionally, with TLSv1.3 the SSL_CB_HANDSHAKE_START flag is currently set
by OpenSSL when receiving a NewSessionTicket message, and was detected by
nginx as a renegotiation attempt. This looks like a bug in OpenSSL, though
this change also allows better interoperability till the problem is fixed.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Tue, 18 Apr 2017 16:08:44 +0300 |
parents | 6c13008ad503 |
children | 7f955d3b9a0d |
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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_mail.h> static void *ngx_mail_core_create_main_conf(ngx_conf_t *cf); static void *ngx_mail_core_create_srv_conf(ngx_conf_t *cf); static char *ngx_mail_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static char *ngx_mail_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_mail_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_mail_core_protocol(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_mail_core_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_mail_core_resolver(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_command_t ngx_mail_core_commands[] = { { ngx_string("server"), NGX_MAIL_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS, ngx_mail_core_server, 0, 0, NULL }, { ngx_string("listen"), NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, ngx_mail_core_listen, NGX_MAIL_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("protocol"), NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, ngx_mail_core_protocol, NGX_MAIL_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("timeout"), NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_MAIL_SRV_CONF_OFFSET, offsetof(ngx_mail_core_srv_conf_t, timeout), NULL }, { ngx_string("server_name"), NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_str_slot, NGX_MAIL_SRV_CONF_OFFSET, offsetof(ngx_mail_core_srv_conf_t, server_name), NULL }, { ngx_string("error_log"), NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, ngx_mail_core_error_log, NGX_MAIL_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("resolver"), NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, ngx_mail_core_resolver, NGX_MAIL_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("resolver_timeout"), NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_MAIL_SRV_CONF_OFFSET, offsetof(ngx_mail_core_srv_conf_t, resolver_timeout), NULL }, ngx_null_command }; static ngx_mail_module_t ngx_mail_core_module_ctx = { NULL, /* protocol */ ngx_mail_core_create_main_conf, /* create main configuration */ NULL, /* init main configuration */ ngx_mail_core_create_srv_conf, /* create server configuration */ ngx_mail_core_merge_srv_conf /* merge server configuration */ }; ngx_module_t ngx_mail_core_module = { NGX_MODULE_V1, &ngx_mail_core_module_ctx, /* module context */ ngx_mail_core_commands, /* module directives */ NGX_MAIL_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 }; static void * ngx_mail_core_create_main_conf(ngx_conf_t *cf) { ngx_mail_core_main_conf_t *cmcf; cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_core_main_conf_t)); if (cmcf == NULL) { return NULL; } if (ngx_array_init(&cmcf->servers, cf->pool, 4, sizeof(ngx_mail_core_srv_conf_t *)) != NGX_OK) { return NULL; } if (ngx_array_init(&cmcf->listen, cf->pool, 4, sizeof(ngx_mail_listen_t)) != NGX_OK) { return NULL; } return cmcf; } static void * ngx_mail_core_create_srv_conf(ngx_conf_t *cf) { ngx_mail_core_srv_conf_t *cscf; cscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_core_srv_conf_t)); if (cscf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * cscf->protocol = NULL; * cscf->error_log = NULL; */ cscf->timeout = NGX_CONF_UNSET_MSEC; cscf->resolver_timeout = NGX_CONF_UNSET_MSEC; cscf->resolver = NGX_CONF_UNSET_PTR; cscf->file_name = cf->conf_file->file.name.data; cscf->line = cf->conf_file->line; return cscf; } static char * ngx_mail_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_mail_core_srv_conf_t *prev = parent; ngx_mail_core_srv_conf_t *conf = child; ngx_conf_merge_msec_value(conf->timeout, prev->timeout, 60000); ngx_conf_merge_msec_value(conf->resolver_timeout, prev->resolver_timeout, 30000); ngx_conf_merge_str_value(conf->server_name, prev->server_name, ""); if (conf->server_name.len == 0) { conf->server_name = cf->cycle->hostname; } if (conf->protocol == NULL) { ngx_log_error(NGX_LOG_EMERG, cf->log, 0, "unknown mail protocol for server in %s:%ui", conf->file_name, conf->line); return NGX_CONF_ERROR; } if (conf->error_log == NULL) { if (prev->error_log) { conf->error_log = prev->error_log; } else { conf->error_log = &cf->cycle->new_log; } } ngx_conf_merge_ptr_value(conf->resolver, prev->resolver, NULL); return NGX_CONF_OK; } static char * ngx_mail_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { char *rv; void *mconf; ngx_uint_t m; ngx_conf_t pcf; ngx_mail_module_t *module; ngx_mail_conf_ctx_t *ctx, *mail_ctx; ngx_mail_core_srv_conf_t *cscf, **cscfp; ngx_mail_core_main_conf_t *cmcf; ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t)); if (ctx == NULL) { return NGX_CONF_ERROR; } mail_ctx = cf->ctx; ctx->main_conf = mail_ctx->main_conf; /* the server{}'s srv_conf */ ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module); if (ctx->srv_conf == NULL) { return NGX_CONF_ERROR; } for (m = 0; cf->cycle->modules[m]; m++) { if (cf->cycle->modules[m]->type != NGX_MAIL_MODULE) { continue; } module = cf->cycle->modules[m]->ctx; if (module->create_srv_conf) { mconf = module->create_srv_conf(cf); if (mconf == NULL) { return NGX_CONF_ERROR; } ctx->srv_conf[cf->cycle->modules[m]->ctx_index] = mconf; } } /* the server configuration context */ cscf = ctx->srv_conf[ngx_mail_core_module.ctx_index]; cscf->ctx = ctx; cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index]; cscfp = ngx_array_push(&cmcf->servers); if (cscfp == NULL) { return NGX_CONF_ERROR; } *cscfp = cscf; /* parse inside server{} */ pcf = *cf; cf->ctx = ctx; cf->cmd_type = NGX_MAIL_SRV_CONF; rv = ngx_conf_parse(cf, NULL); *cf = pcf; if (rv == NGX_CONF_OK && !cscf->listen) { ngx_log_error(NGX_LOG_EMERG, cf->log, 0, "no \"listen\" is defined for server in %s:%ui", cscf->file_name, cscf->line); return NGX_CONF_ERROR; } return rv; } static char * ngx_mail_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_mail_core_srv_conf_t *cscf = conf; ngx_str_t *value, size; ngx_url_t u; ngx_uint_t i, m; ngx_mail_listen_t *ls; ngx_mail_module_t *module; ngx_mail_core_main_conf_t *cmcf; cscf->listen = 1; value = cf->args->elts; ngx_memzero(&u, sizeof(ngx_url_t)); u.url = value[1]; u.listen = 1; if (ngx_parse_url(cf->pool, &u) != NGX_OK) { if (u.err) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s in \"%V\" of the \"listen\" directive", u.err, &u.url); } return NGX_CONF_ERROR; } cmcf = ngx_mail_conf_get_module_main_conf(cf, ngx_mail_core_module); ls = cmcf->listen.elts; for (i = 0; i < cmcf->listen.nelts; i++) { if (ngx_cmp_sockaddr(&ls[i].sockaddr.sockaddr, ls[i].socklen, (struct sockaddr *) &u.sockaddr, u.socklen, 1) != NGX_OK) { continue; } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "duplicate \"%V\" address and port pair", &u.url); return NGX_CONF_ERROR; } ls = ngx_array_push(&cmcf->listen); if (ls == NULL) { return NGX_CONF_ERROR; } ngx_memzero(ls, sizeof(ngx_mail_listen_t)); ngx_memcpy(&ls->sockaddr.sockaddr, &u.sockaddr, u.socklen); ls->socklen = u.socklen; ls->backlog = NGX_LISTEN_BACKLOG; ls->rcvbuf = -1; ls->sndbuf = -1; ls->wildcard = u.wildcard; ls->ctx = cf->ctx; #if (NGX_HAVE_INET6) ls->ipv6only = 1; #endif if (cscf->protocol == NULL) { for (m = 0; cf->cycle->modules[m]; m++) { if (cf->cycle->modules[m]->type != NGX_MAIL_MODULE) { continue; } module = cf->cycle->modules[m]->ctx; if (module->protocol == NULL) { continue; } for (i = 0; module->protocol->port[i]; i++) { if (module->protocol->port[i] == u.port) { cscf->protocol = module->protocol; break; } } } } for (i = 2; i < cf->args->nelts; i++) { if (ngx_strcmp(value[i].data, "bind") == 0) { ls->bind = 1; continue; } if (ngx_strncmp(value[i].data, "backlog=", 8) == 0) { ls->backlog = ngx_atoi(value[i].data + 8, value[i].len - 8); ls->bind = 1; if (ls->backlog == NGX_ERROR || ls->backlog == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid backlog \"%V\"", &value[i]); return NGX_CONF_ERROR; } continue; } if (ngx_strncmp(value[i].data, "rcvbuf=", 7) == 0) { size.len = value[i].len - 7; size.data = value[i].data + 7; ls->rcvbuf = ngx_parse_size(&size); ls->bind = 1; if (ls->rcvbuf == NGX_ERROR) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid rcvbuf \"%V\"", &value[i]); return NGX_CONF_ERROR; } continue; } if (ngx_strncmp(value[i].data, "sndbuf=", 7) == 0) { size.len = value[i].len - 7; size.data = value[i].data + 7; ls->sndbuf = ngx_parse_size(&size); ls->bind = 1; if (ls->sndbuf == NGX_ERROR) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid sndbuf \"%V\"", &value[i]); return NGX_CONF_ERROR; } continue; } if (ngx_strncmp(value[i].data, "ipv6only=o", 10) == 0) { #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) size_t len; u_char buf[NGX_SOCKADDR_STRLEN]; if (ls->sockaddr.sockaddr.sa_family == AF_INET6) { if (ngx_strcmp(&value[i].data[10], "n") == 0) { ls->ipv6only = 1; } else if (ngx_strcmp(&value[i].data[10], "ff") == 0) { ls->ipv6only = 0; } else { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid ipv6only flags \"%s\"", &value[i].data[9]); return NGX_CONF_ERROR; } ls->bind = 1; } else { len = ngx_sock_ntop(&ls->sockaddr.sockaddr, ls->socklen, buf, NGX_SOCKADDR_STRLEN, 1); ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "ipv6only is not supported " "on addr \"%*s\", ignored", len, buf); } continue; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "bind ipv6only is not supported " "on this platform"); return NGX_CONF_ERROR; #endif } if (ngx_strcmp(value[i].data, "ssl") == 0) { #if (NGX_MAIL_SSL) ls->ssl = 1; continue; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the \"ssl\" parameter requires " "ngx_mail_ssl_module"); return NGX_CONF_ERROR; #endif } if (ngx_strncmp(value[i].data, "so_keepalive=", 13) == 0) { if (ngx_strcmp(&value[i].data[13], "on") == 0) { ls->so_keepalive = 1; } else if (ngx_strcmp(&value[i].data[13], "off") == 0) { ls->so_keepalive = 2; } else { #if (NGX_HAVE_KEEPALIVE_TUNABLE) u_char *p, *end; ngx_str_t s; end = value[i].data + value[i].len; s.data = value[i].data + 13; p = ngx_strlchr(s.data, end, ':'); if (p == NULL) { p = end; } if (p > s.data) { s.len = p - s.data; ls->tcp_keepidle = ngx_parse_time(&s, 1); if (ls->tcp_keepidle == (time_t) NGX_ERROR) { goto invalid_so_keepalive; } } s.data = (p < end) ? (p + 1) : end; p = ngx_strlchr(s.data, end, ':'); if (p == NULL) { p = end; } if (p > s.data) { s.len = p - s.data; ls->tcp_keepintvl = ngx_parse_time(&s, 1); if (ls->tcp_keepintvl == (time_t) NGX_ERROR) { goto invalid_so_keepalive; } } s.data = (p < end) ? (p + 1) : end; if (s.data < end) { s.len = end - s.data; ls->tcp_keepcnt = ngx_atoi(s.data, s.len); if (ls->tcp_keepcnt == NGX_ERROR) { goto invalid_so_keepalive; } } if (ls->tcp_keepidle == 0 && ls->tcp_keepintvl == 0 && ls->tcp_keepcnt == 0) { goto invalid_so_keepalive; } ls->so_keepalive = 1; #else ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the \"so_keepalive\" parameter accepts " "only \"on\" or \"off\" on this platform"); return NGX_CONF_ERROR; #endif } ls->bind = 1; continue; #if (NGX_HAVE_KEEPALIVE_TUNABLE) invalid_so_keepalive: ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid so_keepalive value: \"%s\"", &value[i].data[13]); return NGX_CONF_ERROR; #endif } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the invalid \"%V\" parameter", &value[i]); return NGX_CONF_ERROR; } return NGX_CONF_OK; } static char * ngx_mail_core_protocol(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_mail_core_srv_conf_t *cscf = conf; ngx_str_t *value; ngx_uint_t m; ngx_mail_module_t *module; value = cf->args->elts; for (m = 0; cf->cycle->modules[m]; m++) { if (cf->cycle->modules[m]->type != NGX_MAIL_MODULE) { continue; } module = cf->cycle->modules[m]->ctx; if (module->protocol && ngx_strcmp(module->protocol->name.data, value[1].data) == 0) { cscf->protocol = module->protocol; return NGX_CONF_OK; } } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "unknown protocol \"%V\"", &value[1]); return NGX_CONF_ERROR; } static char * ngx_mail_core_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_mail_core_srv_conf_t *cscf = conf; return ngx_log_set_log(cf, &cscf->error_log); } static char * ngx_mail_core_resolver(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_mail_core_srv_conf_t *cscf = conf; ngx_str_t *value; value = cf->args->elts; if (cscf->resolver != NGX_CONF_UNSET_PTR) { return "is duplicate"; } if (ngx_strcmp(value[1].data, "off") == 0) { cscf->resolver = NULL; return NGX_CONF_OK; } cscf->resolver = ngx_resolver_create(cf, &value[1], cf->args->nelts - 1); if (cscf->resolver == NULL) { return NGX_CONF_ERROR; } return NGX_CONF_OK; } char * ngx_mail_capabilities(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { char *p = conf; ngx_str_t *c, *value; ngx_uint_t i; ngx_array_t *a; a = (ngx_array_t *) (p + cmd->offset); value = cf->args->elts; for (i = 1; i < cf->args->nelts; i++) { c = ngx_array_push(a); if (c == NULL) { return NGX_CONF_ERROR; } *c = value[i]; } return NGX_CONF_OK; }