Mercurial > hg > nginx-quic
view src/http/ngx_http_spdy_module.c @ 5503:d049b0ea00a3
SSL: ssl_session_tickets directive.
This adds support so it's possible to explicitly disable SSL Session
Tickets. In order to have good Forward Secrecy support either the
session ticket key has to be reloaded by using nginx' binary upgrade
process or using an external key file and reloading the configuration.
This directive adds another possibility to have good support by
disabling session tickets altogether.
If session tickets are enabled and the process lives for a long a time,
an attacker can grab the session ticket from the process and use that to
decrypt any traffic that occured during the entire lifetime of the
process.
author | Dirkjan Bussink <d.bussink@gmail.com> |
---|---|
date | Fri, 10 Jan 2014 16:12:40 +0100 |
parents | c0f7b94e88ba |
children | e5fb14e85040 |
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/* * Copyright (C) Nginx, Inc. * Copyright (C) Valentin V. Bartenev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #include <ngx_http_spdy_module.h> static ngx_int_t ngx_http_spdy_add_variables(ngx_conf_t *cf); static ngx_int_t ngx_http_spdy_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_spdy_request_priority_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_spdy_module_init(ngx_cycle_t *cycle); static void *ngx_http_spdy_create_main_conf(ngx_conf_t *cf); static char *ngx_http_spdy_init_main_conf(ngx_conf_t *cf, void *conf); static void *ngx_http_spdy_create_srv_conf(ngx_conf_t *cf); static char *ngx_http_spdy_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static char *ngx_http_spdy_recv_buffer_size(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_spdy_pool_size(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_spdy_streams_index_mask(ngx_conf_t *cf, void *post, void *data); static ngx_conf_num_bounds_t ngx_http_spdy_headers_comp_bounds = { ngx_conf_check_num_bounds, 0, 9 }; static ngx_conf_post_t ngx_http_spdy_recv_buffer_size_post = { ngx_http_spdy_recv_buffer_size }; static ngx_conf_post_t ngx_http_spdy_pool_size_post = { ngx_http_spdy_pool_size }; static ngx_conf_post_t ngx_http_spdy_streams_index_mask_post = { ngx_http_spdy_streams_index_mask }; static ngx_command_t ngx_http_spdy_commands[] = { { ngx_string("spdy_recv_buffer_size"), NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_MAIN_CONF_OFFSET, offsetof(ngx_http_spdy_main_conf_t, recv_buffer_size), &ngx_http_spdy_recv_buffer_size_post }, { ngx_string("spdy_pool_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_spdy_srv_conf_t, pool_size), &ngx_http_spdy_pool_size_post }, { ngx_string("spdy_max_concurrent_streams"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_spdy_srv_conf_t, concurrent_streams), NULL }, { ngx_string("spdy_streams_index_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_spdy_srv_conf_t, streams_index_mask), &ngx_http_spdy_streams_index_mask_post }, { ngx_string("spdy_recv_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_spdy_srv_conf_t, recv_timeout), NULL }, { ngx_string("spdy_keepalive_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_spdy_srv_conf_t, keepalive_timeout), NULL }, { ngx_string("spdy_headers_comp"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_spdy_srv_conf_t, headers_comp), &ngx_http_spdy_headers_comp_bounds }, ngx_null_command }; static ngx_http_module_t ngx_http_spdy_module_ctx = { ngx_http_spdy_add_variables, /* preconfiguration */ NULL, /* postconfiguration */ ngx_http_spdy_create_main_conf, /* create main configuration */ ngx_http_spdy_init_main_conf, /* init main configuration */ ngx_http_spdy_create_srv_conf, /* create server configuration */ ngx_http_spdy_merge_srv_conf, /* merge server configuration */ NULL, /* create location configuration */ NULL /* merge location configuration */ }; ngx_module_t ngx_http_spdy_module = { NGX_MODULE_V1, &ngx_http_spdy_module_ctx, /* module context */ ngx_http_spdy_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ ngx_http_spdy_module_init, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_http_variable_t ngx_http_spdy_vars[] = { { ngx_string("spdy"), NULL, ngx_http_spdy_variable, 0, 0, 0 }, { ngx_string("spdy_request_priority"), NULL, ngx_http_spdy_request_priority_variable, 0, 0, 0 }, { ngx_null_string, NULL, NULL, 0, 0, 0 } }; static ngx_int_t ngx_http_spdy_add_variables(ngx_conf_t *cf) { ngx_http_variable_t *var, *v; for (v = ngx_http_spdy_vars; v->name.len; v++) { var = ngx_http_add_variable(cf, &v->name, v->flags); if (var == NULL) { return NGX_ERROR; } var->get_handler = v->get_handler; var->data = v->data; } return NGX_OK; } static ngx_int_t ngx_http_spdy_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->spdy_stream) { v->len = 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "2"; return NGX_OK; } *v = ngx_http_variable_null_value; return NGX_OK; } static ngx_int_t ngx_http_spdy_request_priority_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->spdy_stream) { v->len = 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = ngx_pnalloc(r->pool, 1); if (v->data == NULL) { return NGX_ERROR; } v->data[0] = '0' + (u_char) r->spdy_stream->priority; return NGX_OK; } *v = ngx_http_variable_null_value; return NGX_OK; } static ngx_int_t ngx_http_spdy_module_init(ngx_cycle_t *cycle) { ngx_http_spdy_request_headers_init(); return NGX_OK; } static void * ngx_http_spdy_create_main_conf(ngx_conf_t *cf) { ngx_http_spdy_main_conf_t *smcf; smcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_spdy_main_conf_t)); if (smcf == NULL) { return NULL; } smcf->recv_buffer_size = NGX_CONF_UNSET_SIZE; return smcf; } static char * ngx_http_spdy_init_main_conf(ngx_conf_t *cf, void *conf) { ngx_http_spdy_main_conf_t *smcf = conf; if (smcf->recv_buffer_size == NGX_CONF_UNSET_SIZE) { smcf->recv_buffer_size = 256 * 1024; } return NGX_CONF_OK; } static void * ngx_http_spdy_create_srv_conf(ngx_conf_t *cf) { ngx_http_spdy_srv_conf_t *sscf; sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_spdy_srv_conf_t)); if (sscf == NULL) { return NULL; } sscf->pool_size = NGX_CONF_UNSET_SIZE; sscf->concurrent_streams = NGX_CONF_UNSET_UINT; sscf->streams_index_mask = NGX_CONF_UNSET_UINT; sscf->recv_timeout = NGX_CONF_UNSET_MSEC; sscf->keepalive_timeout = NGX_CONF_UNSET_MSEC; sscf->headers_comp = NGX_CONF_UNSET; return sscf; } static char * ngx_http_spdy_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_spdy_srv_conf_t *prev = parent; ngx_http_spdy_srv_conf_t *conf = child; ngx_conf_merge_size_value(conf->pool_size, prev->pool_size, 4096); ngx_conf_merge_uint_value(conf->concurrent_streams, prev->concurrent_streams, 100); ngx_conf_merge_uint_value(conf->streams_index_mask, prev->streams_index_mask, 32 - 1); ngx_conf_merge_msec_value(conf->recv_timeout, prev->recv_timeout, 30000); ngx_conf_merge_msec_value(conf->keepalive_timeout, prev->keepalive_timeout, 180000); ngx_conf_merge_value(conf->headers_comp, prev->headers_comp, 0); return NGX_CONF_OK; } static char * ngx_http_spdy_recv_buffer_size(ngx_conf_t *cf, void *post, void *data) { size_t *sp = data; if (*sp <= 2 * NGX_SPDY_STATE_BUFFER_SIZE) { return "value is too small"; } return NGX_CONF_OK; } static char * ngx_http_spdy_pool_size(ngx_conf_t *cf, void *post, void *data) { size_t *sp = data; if (*sp < NGX_MIN_POOL_SIZE) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the pool size must be no less than %uz", NGX_MIN_POOL_SIZE); return NGX_CONF_ERROR; } if (*sp % NGX_POOL_ALIGNMENT) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the pool size must be a multiple of %uz", NGX_POOL_ALIGNMENT); return NGX_CONF_ERROR; } return NGX_CONF_OK; } static char * ngx_http_spdy_streams_index_mask(ngx_conf_t *cf, void *post, void *data) { ngx_uint_t *np = data; ngx_uint_t mask; mask = *np - 1; if (*np == 0 || (*np & mask)) { return "must be a power of two"; } *np = mask; return NGX_CONF_OK; }