Mercurial > hg > nginx-quic
view src/mail/ngx_mail.c @ 6553:2014ed60f17f
SSL: support for multiple curves (ticket #885).
OpenSSL 1.0.2+ allows configuring a curve list instead of a single curve
previously supported. This allows use of different curves depending on
what client supports (as available via the elliptic_curves extension),
and also allows use of different curves in an ECDHE key exchange and
in the ECDSA certificate.
The special value "auto" was introduced (now the default for ssl_ecdh_curve),
which means "use an internal list of curves as available in the OpenSSL
library used". For versions prior to OpenSSL 1.0.2 it maps to "prime256v1"
as previously used. The default in 1.0.2b+ prefers prime256v1 as well
(and X25519 in OpenSSL 1.1.0+).
As client vs. server preference of curves is controlled by the
same option as used for ciphers (SSL_OP_CIPHER_SERVER_PREFERENCE),
the ssl_prefer_server_ciphers directive now controls both.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 19 May 2016 14:46:32 +0300 |
parents | cf5e822cf470 |
children | c90cf79d0e1d |
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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 char *ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_int_t ngx_mail_add_ports(ngx_conf_t *cf, ngx_array_t *ports, ngx_mail_listen_t *listen); static char *ngx_mail_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports); static ngx_int_t ngx_mail_add_addrs(ngx_conf_t *cf, ngx_mail_port_t *mport, ngx_mail_conf_addr_t *addr); #if (NGX_HAVE_INET6) static ngx_int_t ngx_mail_add_addrs6(ngx_conf_t *cf, ngx_mail_port_t *mport, ngx_mail_conf_addr_t *addr); #endif static ngx_int_t ngx_mail_cmp_conf_addrs(const void *one, const void *two); ngx_uint_t ngx_mail_max_module; static ngx_command_t ngx_mail_commands[] = { { ngx_string("mail"), NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS, ngx_mail_block, 0, 0, NULL }, ngx_null_command }; static ngx_core_module_t ngx_mail_module_ctx = { ngx_string("mail"), NULL, NULL }; ngx_module_t ngx_mail_module = { NGX_MODULE_V1, &ngx_mail_module_ctx, /* module context */ ngx_mail_commands, /* module directives */ NGX_CORE_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 char * ngx_mail_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { char *rv; ngx_uint_t i, m, mi, s; ngx_conf_t pcf; ngx_array_t ports; ngx_mail_listen_t *listen; ngx_mail_module_t *module; ngx_mail_conf_ctx_t *ctx; ngx_mail_core_srv_conf_t **cscfp; ngx_mail_core_main_conf_t *cmcf; if (*(ngx_mail_conf_ctx_t **) conf) { return "is duplicate"; } /* the main mail context */ ctx = ngx_pcalloc(cf->pool, sizeof(ngx_mail_conf_ctx_t)); if (ctx == NULL) { return NGX_CONF_ERROR; } *(ngx_mail_conf_ctx_t **) conf = ctx; /* count the number of the mail modules and set up their indices */ ngx_mail_max_module = ngx_count_modules(cf->cycle, NGX_MAIL_MODULE); /* the mail main_conf context, it is the same in the all mail contexts */ ctx->main_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module); if (ctx->main_conf == NULL) { return NGX_CONF_ERROR; } /* * the mail null srv_conf context, it is used to merge * the server{}s' srv_conf's */ ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_mail_max_module); if (ctx->srv_conf == NULL) { return NGX_CONF_ERROR; } /* * create the main_conf's and the null srv_conf's of the all mail modules */ for (m = 0; cf->cycle->modules[m]; m++) { if (cf->cycle->modules[m]->type != NGX_MAIL_MODULE) { continue; } module = cf->cycle->modules[m]->ctx; mi = cf->cycle->modules[m]->ctx_index; if (module->create_main_conf) { ctx->main_conf[mi] = module->create_main_conf(cf); if (ctx->main_conf[mi] == NULL) { return NGX_CONF_ERROR; } } if (module->create_srv_conf) { ctx->srv_conf[mi] = module->create_srv_conf(cf); if (ctx->srv_conf[mi] == NULL) { return NGX_CONF_ERROR; } } } /* parse inside the mail{} block */ pcf = *cf; cf->ctx = ctx; cf->module_type = NGX_MAIL_MODULE; cf->cmd_type = NGX_MAIL_MAIN_CONF; rv = ngx_conf_parse(cf, NULL); if (rv != NGX_CONF_OK) { *cf = pcf; return rv; } /* init mail{} main_conf's, merge the server{}s' srv_conf's */ cmcf = ctx->main_conf[ngx_mail_core_module.ctx_index]; cscfp = cmcf->servers.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; mi = cf->cycle->modules[m]->ctx_index; /* init mail{} main_conf's */ cf->ctx = ctx; if (module->init_main_conf) { rv = module->init_main_conf(cf, ctx->main_conf[mi]); if (rv != NGX_CONF_OK) { *cf = pcf; return rv; } } for (s = 0; s < cmcf->servers.nelts; s++) { /* merge the server{}s' srv_conf's */ cf->ctx = cscfp[s]->ctx; if (module->merge_srv_conf) { rv = module->merge_srv_conf(cf, ctx->srv_conf[mi], cscfp[s]->ctx->srv_conf[mi]); if (rv != NGX_CONF_OK) { *cf = pcf; return rv; } } } } *cf = pcf; if (ngx_array_init(&ports, cf->temp_pool, 4, sizeof(ngx_mail_conf_port_t)) != NGX_OK) { return NGX_CONF_ERROR; } listen = cmcf->listen.elts; for (i = 0; i < cmcf->listen.nelts; i++) { if (ngx_mail_add_ports(cf, &ports, &listen[i]) != NGX_OK) { return NGX_CONF_ERROR; } } return ngx_mail_optimize_servers(cf, &ports); } static ngx_int_t ngx_mail_add_ports(ngx_conf_t *cf, ngx_array_t *ports, ngx_mail_listen_t *listen) { in_port_t p; ngx_uint_t i; struct sockaddr *sa; struct sockaddr_in *sin; ngx_mail_conf_port_t *port; ngx_mail_conf_addr_t *addr; #if (NGX_HAVE_INET6) struct sockaddr_in6 *sin6; #endif sa = &listen->u.sockaddr; switch (sa->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: sin6 = &listen->u.sockaddr_in6; p = sin6->sin6_port; break; #endif #if (NGX_HAVE_UNIX_DOMAIN) case AF_UNIX: p = 0; break; #endif default: /* AF_INET */ sin = &listen->u.sockaddr_in; p = sin->sin_port; break; } port = ports->elts; for (i = 0; i < ports->nelts; i++) { if (p == port[i].port && sa->sa_family == port[i].family) { /* a port is already in the port list */ port = &port[i]; goto found; } } /* add a port to the port list */ port = ngx_array_push(ports); if (port == NULL) { return NGX_ERROR; } port->family = sa->sa_family; port->port = p; if (ngx_array_init(&port->addrs, cf->temp_pool, 2, sizeof(ngx_mail_conf_addr_t)) != NGX_OK) { return NGX_ERROR; } found: addr = ngx_array_push(&port->addrs); if (addr == NULL) { return NGX_ERROR; } addr->opt = *listen; return NGX_OK; } static char * ngx_mail_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports) { ngx_uint_t i, p, last, bind_wildcard; ngx_listening_t *ls; ngx_mail_port_t *mport; ngx_mail_conf_port_t *port; ngx_mail_conf_addr_t *addr; ngx_mail_core_srv_conf_t *cscf; port = ports->elts; for (p = 0; p < ports->nelts; p++) { ngx_sort(port[p].addrs.elts, (size_t) port[p].addrs.nelts, sizeof(ngx_mail_conf_addr_t), ngx_mail_cmp_conf_addrs); addr = port[p].addrs.elts; last = port[p].addrs.nelts; /* * if there is the binding to the "*:port" then we need to bind() * to the "*:port" only and ignore the other bindings */ if (addr[last - 1].opt.wildcard) { addr[last - 1].opt.bind = 1; bind_wildcard = 1; } else { bind_wildcard = 0; } i = 0; while (i < last) { if (bind_wildcard && !addr[i].opt.bind) { i++; continue; } ls = ngx_create_listening(cf, &addr[i].opt.u.sockaddr, addr[i].opt.socklen); if (ls == NULL) { return NGX_CONF_ERROR; } ls->addr_ntop = 1; ls->handler = ngx_mail_init_connection; ls->pool_size = 256; cscf = addr->opt.ctx->srv_conf[ngx_mail_core_module.ctx_index]; ls->logp = cscf->error_log; ls->log.data = &ls->addr_text; ls->log.handler = ngx_accept_log_error; ls->backlog = addr[i].opt.backlog; ls->keepalive = addr[i].opt.so_keepalive; #if (NGX_HAVE_KEEPALIVE_TUNABLE) ls->keepidle = addr[i].opt.tcp_keepidle; ls->keepintvl = addr[i].opt.tcp_keepintvl; ls->keepcnt = addr[i].opt.tcp_keepcnt; #endif #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY) ls->ipv6only = addr[i].opt.ipv6only; #endif mport = ngx_palloc(cf->pool, sizeof(ngx_mail_port_t)); if (mport == NULL) { return NGX_CONF_ERROR; } ls->servers = mport; mport->naddrs = i + 1; switch (ls->sockaddr->sa_family) { #if (NGX_HAVE_INET6) case AF_INET6: if (ngx_mail_add_addrs6(cf, mport, addr) != NGX_OK) { return NGX_CONF_ERROR; } break; #endif default: /* AF_INET */ if (ngx_mail_add_addrs(cf, mport, addr) != NGX_OK) { return NGX_CONF_ERROR; } break; } addr++; last--; } } return NGX_CONF_OK; } static ngx_int_t ngx_mail_add_addrs(ngx_conf_t *cf, ngx_mail_port_t *mport, ngx_mail_conf_addr_t *addr) { u_char *p; size_t len; ngx_uint_t i; ngx_mail_in_addr_t *addrs; struct sockaddr_in *sin; u_char buf[NGX_SOCKADDR_STRLEN]; mport->addrs = ngx_pcalloc(cf->pool, mport->naddrs * sizeof(ngx_mail_in_addr_t)); if (mport->addrs == NULL) { return NGX_ERROR; } addrs = mport->addrs; for (i = 0; i < mport->naddrs; i++) { sin = &addr[i].opt.u.sockaddr_in; addrs[i].addr = sin->sin_addr.s_addr; addrs[i].conf.ctx = addr[i].opt.ctx; #if (NGX_MAIL_SSL) addrs[i].conf.ssl = addr[i].opt.ssl; #endif len = ngx_sock_ntop(&addr[i].opt.u.sockaddr, addr[i].opt.socklen, buf, NGX_SOCKADDR_STRLEN, 1); p = ngx_pnalloc(cf->pool, len); if (p == NULL) { return NGX_ERROR; } ngx_memcpy(p, buf, len); addrs[i].conf.addr_text.len = len; addrs[i].conf.addr_text.data = p; } return NGX_OK; } #if (NGX_HAVE_INET6) static ngx_int_t ngx_mail_add_addrs6(ngx_conf_t *cf, ngx_mail_port_t *mport, ngx_mail_conf_addr_t *addr) { u_char *p; size_t len; ngx_uint_t i; ngx_mail_in6_addr_t *addrs6; struct sockaddr_in6 *sin6; u_char buf[NGX_SOCKADDR_STRLEN]; mport->addrs = ngx_pcalloc(cf->pool, mport->naddrs * sizeof(ngx_mail_in6_addr_t)); if (mport->addrs == NULL) { return NGX_ERROR; } addrs6 = mport->addrs; for (i = 0; i < mport->naddrs; i++) { sin6 = &addr[i].opt.u.sockaddr_in6; addrs6[i].addr6 = sin6->sin6_addr; addrs6[i].conf.ctx = addr[i].opt.ctx; #if (NGX_MAIL_SSL) addrs6[i].conf.ssl = addr[i].opt.ssl; #endif len = ngx_sock_ntop(&addr[i].opt.u.sockaddr, addr[i].opt.socklen, buf, NGX_SOCKADDR_STRLEN, 1); p = ngx_pnalloc(cf->pool, len); if (p == NULL) { return NGX_ERROR; } ngx_memcpy(p, buf, len); addrs6[i].conf.addr_text.len = len; addrs6[i].conf.addr_text.data = p; } return NGX_OK; } #endif static ngx_int_t ngx_mail_cmp_conf_addrs(const void *one, const void *two) { ngx_mail_conf_addr_t *first, *second; first = (ngx_mail_conf_addr_t *) one; second = (ngx_mail_conf_addr_t *) two; if (first->opt.wildcard) { /* a wildcard must be the last resort, shift it to the end */ return 1; } if (second->opt.wildcard) { /* a wildcard must be the last resort, shift it to the end */ return -1; } if (first->opt.bind && !second->opt.bind) { /* shift explicit bind()ed addresses to the start */ return -1; } if (!first->opt.bind && second->opt.bind) { /* shift explicit bind()ed addresses to the start */ return 1; } /* do not sort by default */ return 0; }