625 lines
18 KiB
C
625 lines
18 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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typedef ngx_int_t (*ngx_ssl_variable_handler_pt)(ngx_connection_t *c,
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ngx_pool_t *pool, ngx_str_t *s);
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#define NGX_DEFAULT_CIPHERS "HIGH:!ADH:!MD5"
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static ngx_int_t ngx_http_ssl_static_variable(ngx_http_request_t *r,
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ngx_http_variable_value_t *v, uintptr_t data);
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static ngx_int_t ngx_http_ssl_variable(ngx_http_request_t *r,
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ngx_http_variable_value_t *v, uintptr_t data);
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static ngx_int_t ngx_http_ssl_add_variables(ngx_conf_t *cf);
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static void *ngx_http_ssl_create_srv_conf(ngx_conf_t *cf);
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static char *ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf,
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void *parent, void *child);
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static char *ngx_http_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static char *ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
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void *conf);
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static ngx_conf_bitmask_t ngx_http_ssl_protocols[] = {
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{ ngx_string("SSLv2"), NGX_SSL_SSLv2 },
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{ ngx_string("SSLv3"), NGX_SSL_SSLv3 },
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{ ngx_string("TLSv1"), NGX_SSL_TLSv1 },
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{ ngx_null_string, 0 }
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};
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static ngx_conf_enum_t ngx_http_ssl_verify[] = {
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{ ngx_string("off"), 0 },
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{ ngx_string("on"), 1 },
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{ ngx_string("optional"), 2 },
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{ ngx_null_string, 0 }
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};
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static ngx_command_t ngx_http_ssl_commands[] = {
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{ ngx_string("ssl"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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ngx_http_ssl_enable,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, enable),
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NULL },
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{ ngx_string("ssl_certificate"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, certificate),
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NULL },
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{ ngx_string("ssl_certificate_key"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, certificate_key),
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NULL },
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{ ngx_string("ssl_dhparam"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, dhparam),
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NULL },
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{ ngx_string("ssl_protocols"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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ngx_conf_set_bitmask_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, protocols),
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&ngx_http_ssl_protocols },
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{ ngx_string("ssl_ciphers"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, ciphers),
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NULL },
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{ ngx_string("ssl_verify_client"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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ngx_conf_set_enum_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, verify),
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&ngx_http_ssl_verify },
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{ ngx_string("ssl_verify_depth"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
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ngx_conf_set_num_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, verify_depth),
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NULL },
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{ ngx_string("ssl_client_certificate"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, client_certificate),
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NULL },
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{ ngx_string("ssl_prefer_server_ciphers"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
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ngx_conf_set_flag_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, prefer_server_ciphers),
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NULL },
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{ ngx_string("ssl_session_cache"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE12,
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ngx_http_ssl_session_cache,
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NGX_HTTP_SRV_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("ssl_session_timeout"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_sec_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, session_timeout),
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NULL },
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{ ngx_string("ssl_crl"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_str_slot,
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NGX_HTTP_SRV_CONF_OFFSET,
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offsetof(ngx_http_ssl_srv_conf_t, crl),
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NULL },
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ngx_null_command
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};
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static ngx_http_module_t ngx_http_ssl_module_ctx = {
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ngx_http_ssl_add_variables, /* preconfiguration */
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NULL, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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ngx_http_ssl_create_srv_conf, /* create server configuration */
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ngx_http_ssl_merge_srv_conf, /* merge server configuration */
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NULL, /* create location configuration */
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NULL /* merge location configuration */
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};
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ngx_module_t ngx_http_ssl_module = {
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NGX_MODULE_V1,
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&ngx_http_ssl_module_ctx, /* module context */
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ngx_http_ssl_commands, /* module directives */
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NGX_HTTP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static ngx_http_variable_t ngx_http_ssl_vars[] = {
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{ ngx_string("ssl_protocol"), NULL, ngx_http_ssl_static_variable,
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(uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_cipher"), NULL, ngx_http_ssl_static_variable,
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(uintptr_t) ngx_ssl_get_cipher_name, NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_session_id"), NULL, ngx_http_ssl_variable,
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(uintptr_t) ngx_ssl_get_session_id, NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_client_cert"), NULL, ngx_http_ssl_variable,
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(uintptr_t) ngx_ssl_get_certificate, NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_client_raw_cert"), NULL, ngx_http_ssl_variable,
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(uintptr_t) ngx_ssl_get_raw_certificate,
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NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_client_s_dn"), NULL, ngx_http_ssl_variable,
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(uintptr_t) ngx_ssl_get_subject_dn, NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_client_i_dn"), NULL, ngx_http_ssl_variable,
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(uintptr_t) ngx_ssl_get_issuer_dn, NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_client_serial"), NULL, ngx_http_ssl_variable,
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(uintptr_t) ngx_ssl_get_serial_number, NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_string("ssl_client_verify"), NULL, ngx_http_ssl_variable,
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(uintptr_t) ngx_ssl_get_client_verify, NGX_HTTP_VAR_CHANGEABLE, 0 },
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{ ngx_null_string, NULL, NULL, 0, 0, 0 }
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};
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static ngx_str_t ngx_http_ssl_sess_id_ctx = ngx_string("HTTP");
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static ngx_int_t
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ngx_http_ssl_static_variable(ngx_http_request_t *r,
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ngx_http_variable_value_t *v, uintptr_t data)
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{
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ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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size_t len;
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ngx_str_t s;
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if (r->connection->ssl) {
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(void) handler(r->connection, NULL, &s);
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v->data = s.data;
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for (len = 0; v->data[len]; len++) { /* void */ }
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v->len = len;
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v->valid = 1;
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v->no_cacheable = 0;
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v->not_found = 0;
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return NGX_OK;
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}
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v->not_found = 1;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_ssl_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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uintptr_t data)
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{
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ngx_ssl_variable_handler_pt handler = (ngx_ssl_variable_handler_pt) data;
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ngx_str_t s;
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if (r->connection->ssl) {
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if (handler(r->connection, r->pool, &s) != NGX_OK) {
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return NGX_ERROR;
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}
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v->len = s.len;
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v->data = s.data;
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if (v->len) {
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v->valid = 1;
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v->no_cacheable = 0;
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v->not_found = 0;
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return NGX_OK;
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}
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}
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v->not_found = 1;
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return NGX_OK;
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}
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static ngx_int_t
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ngx_http_ssl_add_variables(ngx_conf_t *cf)
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{
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ngx_http_variable_t *var, *v;
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for (v = ngx_http_ssl_vars; v->name.len; v++) {
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var = ngx_http_add_variable(cf, &v->name, v->flags);
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if (var == NULL) {
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return NGX_ERROR;
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}
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var->get_handler = v->get_handler;
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var->data = v->data;
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}
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return NGX_OK;
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}
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static void *
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ngx_http_ssl_create_srv_conf(ngx_conf_t *cf)
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{
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ngx_http_ssl_srv_conf_t *sscf;
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sscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssl_srv_conf_t));
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if (sscf == NULL) {
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return NULL;
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}
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/*
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* set by ngx_pcalloc():
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*
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* sscf->protocols = 0;
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* sscf->certificate = { 0, NULL };
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* sscf->certificate_key = { 0, NULL };
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* sscf->dhparam = { 0, NULL };
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* sscf->client_certificate = { 0, NULL };
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* sscf->crl = { 0, NULL };
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* sscf->ciphers.len = 0;
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* sscf->ciphers.data = NULL;
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* sscf->shm_zone = NULL;
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*/
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sscf->enable = NGX_CONF_UNSET;
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sscf->prefer_server_ciphers = NGX_CONF_UNSET;
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sscf->verify = NGX_CONF_UNSET_UINT;
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sscf->verify_depth = NGX_CONF_UNSET_UINT;
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sscf->builtin_session_cache = NGX_CONF_UNSET;
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sscf->session_timeout = NGX_CONF_UNSET;
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return sscf;
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}
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static char *
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ngx_http_ssl_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_http_ssl_srv_conf_t *prev = parent;
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ngx_http_ssl_srv_conf_t *conf = child;
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ngx_pool_cleanup_t *cln;
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ngx_conf_merge_value(conf->enable, prev->enable, 0);
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ngx_conf_merge_value(conf->session_timeout,
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prev->session_timeout, 300);
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ngx_conf_merge_value(conf->prefer_server_ciphers,
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prev->prefer_server_ciphers, 0);
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ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
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(NGX_CONF_BITMASK_SET|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
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ngx_conf_merge_uint_value(conf->verify, prev->verify, 0);
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ngx_conf_merge_uint_value(conf->verify_depth, prev->verify_depth, 1);
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ngx_conf_merge_str_value(conf->certificate, prev->certificate, "");
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ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key, "");
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ngx_conf_merge_str_value(conf->dhparam, prev->dhparam, "");
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ngx_conf_merge_str_value(conf->client_certificate, prev->client_certificate,
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"");
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ngx_conf_merge_str_value(conf->crl, prev->crl, "");
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ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFAULT_CIPHERS);
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conf->ssl.log = cf->log;
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if (conf->enable) {
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if (conf->certificate.len == 0) {
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ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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"no \"ssl_certificate\" is defined for "
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"the \"ssl\" directive in %s:%ui",
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conf->file, conf->line);
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return NGX_CONF_ERROR;
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}
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if (conf->certificate_key.len == 0) {
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ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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"no \"ssl_certificate_key\" is defined for "
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"the \"ssl\" directive in %s:%ui",
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conf->file, conf->line);
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return NGX_CONF_ERROR;
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}
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} else {
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if (conf->certificate.len == 0) {
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return NGX_CONF_OK;
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}
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if (conf->certificate_key.len == 0) {
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ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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"no \"ssl_certificate_key\" is defined "
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"for certificate \"%V\"", &conf->certificate);
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return NGX_CONF_ERROR;
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}
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}
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if (ngx_ssl_create(&conf->ssl, conf->protocols, conf) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
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if (SSL_CTX_set_tlsext_servername_callback(conf->ssl.ctx,
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ngx_http_ssl_servername)
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== 0)
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{
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ngx_log_error(NGX_LOG_WARN, cf->log, 0,
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"nginx was built with SNI support, however, now it is linked "
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"dynamically to an OpenSSL library which has no tlsext support, "
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"therefore SNI is not available");
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}
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#endif
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cln = ngx_pool_cleanup_add(cf->pool, 0);
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if (cln == NULL) {
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return NGX_CONF_ERROR;
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}
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cln->handler = ngx_ssl_cleanup_ctx;
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cln->data = &conf->ssl;
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if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
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&conf->certificate_key)
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!= NGX_OK)
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{
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return NGX_CONF_ERROR;
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}
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if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
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(const char *) conf->ciphers.data)
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== 0)
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{
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ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
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"SSL_CTX_set_cipher_list(\"%V\") failed",
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&conf->ciphers);
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}
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if (conf->verify) {
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if (conf->client_certificate.len == 0) {
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ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
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"no ssl_client_certificate for ssl_client_verify");
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return NGX_CONF_ERROR;
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}
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if (ngx_ssl_client_certificate(cf, &conf->ssl,
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&conf->client_certificate,
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conf->verify_depth)
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!= NGX_OK)
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{
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return NGX_CONF_ERROR;
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}
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if (ngx_ssl_crl(cf, &conf->ssl, &conf->crl) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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}
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if (conf->prefer_server_ciphers) {
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SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
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}
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/* a temporary 512-bit RSA key is required for export versions of MSIE */
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if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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if (ngx_ssl_dhparam(cf, &conf->ssl, &conf->dhparam) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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ngx_conf_merge_value(conf->builtin_session_cache,
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prev->builtin_session_cache, NGX_SSL_NONE_SCACHE);
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if (conf->shm_zone == NULL) {
|
|
conf->shm_zone = prev->shm_zone;
|
|
}
|
|
|
|
if (ngx_ssl_session_cache(&conf->ssl, &ngx_http_ssl_sess_id_ctx,
|
|
conf->builtin_session_cache,
|
|
conf->shm_zone, conf->session_timeout)
|
|
!= NGX_OK)
|
|
{
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_http_ssl_enable(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
{
|
|
ngx_http_ssl_srv_conf_t *sscf = conf;
|
|
|
|
char *rv;
|
|
|
|
rv = ngx_conf_set_flag_slot(cf, cmd, conf);
|
|
|
|
if (rv != NGX_CONF_OK) {
|
|
return rv;
|
|
}
|
|
|
|
sscf->file = cf->conf_file->file.name.data;
|
|
sscf->line = cf->conf_file->line;
|
|
|
|
return NGX_CONF_OK;
|
|
}
|
|
|
|
|
|
static char *
|
|
ngx_http_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
{
|
|
ngx_http_ssl_srv_conf_t *sscf = conf;
|
|
|
|
size_t len;
|
|
ngx_str_t *value, name, size;
|
|
ngx_int_t n;
|
|
ngx_uint_t i, j;
|
|
|
|
value = cf->args->elts;
|
|
|
|
for (i = 1; i < cf->args->nelts; i++) {
|
|
|
|
if (ngx_strcmp(value[i].data, "off") == 0) {
|
|
sscf->builtin_session_cache = NGX_SSL_NO_SCACHE;
|
|
continue;
|
|
}
|
|
|
|
if (ngx_strcmp(value[i].data, "none") == 0) {
|
|
sscf->builtin_session_cache = NGX_SSL_NONE_SCACHE;
|
|
continue;
|
|
}
|
|
|
|
if (ngx_strcmp(value[i].data, "builtin") == 0) {
|
|
sscf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE;
|
|
continue;
|
|
}
|
|
|
|
if (value[i].len > sizeof("builtin:") - 1
|
|
&& ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1)
|
|
== 0)
|
|
{
|
|
n = ngx_atoi(value[i].data + sizeof("builtin:") - 1,
|
|
value[i].len - (sizeof("builtin:") - 1));
|
|
|
|
if (n == NGX_ERROR) {
|
|
goto invalid;
|
|
}
|
|
|
|
sscf->builtin_session_cache = n;
|
|
|
|
continue;
|
|
}
|
|
|
|
if (value[i].len > sizeof("shared:") - 1
|
|
&& ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1)
|
|
== 0)
|
|
{
|
|
len = 0;
|
|
|
|
for (j = sizeof("shared:") - 1; j < value[i].len; j++) {
|
|
if (value[i].data[j] == ':') {
|
|
value[i].data[j] = '\0';
|
|
break;
|
|
}
|
|
|
|
len++;
|
|
}
|
|
|
|
if (len == 0) {
|
|
goto invalid;
|
|
}
|
|
|
|
name.len = len;
|
|
name.data = value[i].data + sizeof("shared:") - 1;
|
|
|
|
size.len = value[i].len - j - 1;
|
|
size.data = name.data + len + 1;
|
|
|
|
n = ngx_parse_size(&size);
|
|
|
|
if (n == NGX_ERROR) {
|
|
goto invalid;
|
|
}
|
|
|
|
if (n < (ngx_int_t) (8 * ngx_pagesize)) {
|
|
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
"session cache \"%V\" is too small",
|
|
&value[i]);
|
|
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
sscf->shm_zone = ngx_shared_memory_add(cf, &name, n,
|
|
&ngx_http_ssl_module);
|
|
if (sscf->shm_zone == NULL) {
|
|
return NGX_CONF_ERROR;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
goto invalid;
|
|
}
|
|
|
|
if (sscf->shm_zone && sscf->builtin_session_cache == NGX_CONF_UNSET) {
|
|
sscf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE;
|
|
}
|
|
|
|
return NGX_CONF_OK;
|
|
|
|
invalid:
|
|
|
|
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
"invalid session cache \"%V\"", &value[i]);
|
|
|
|
return NGX_CONF_ERROR;
|
|
}
|