mirror of
https://github.com/owasp-modsecurity/ModSecurity.git
synced 2025-08-16 07:56:12 +03:00
794 lines
24 KiB
C
794 lines
24 KiB
C
/*
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* ModSecurity for Apache 2.x, http://www.modsecurity.org/
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* Copyright (c) 2004-2011 Trustwave Holdings, Inc. (http://www.trustwave.com/)
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*
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* You may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* If any of the files related to licensing are missing or if you have any
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* other questions related to licensing please contact Trustwave Holdings, Inc.
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* directly using the email address security@modsecurity.org.
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*/
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#include <nginx.h>
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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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#include <ngx_event.h>
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#include <ngx_http_core_module.h>
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#include <ctype.h>
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#include <sys/times.h>
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#undef CR
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#undef LF
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#undef CRLF
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#include "api.h"
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#define NOTE_NGINX_REQUEST_CTX "nginx-ctx"
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extern ngx_module_t ngx_http_modsecurity;
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struct ngx_http_modsecurity_ctx_s;
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typedef ngx_int_t (*ngx_http_request_body_data_handler_pt)
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(struct ngx_http_modsecurity_ctx_s*, u_char *, u_char*);
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typedef struct {
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ngx_uint_t enable;
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directory_config *config;
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ngx_str_t url;
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ngx_http_complex_value_t *url_cv;
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} ngx_http_modsecurity_loc_conf_t;
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typedef struct ngx_http_modsecurity_ctx_s {
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ngx_http_request_t *r;
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conn_rec *connection;
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request_rec *req;
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ngx_chain_t *chain;
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ngx_buf_t buf;
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void **loc_conf;
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unsigned request_body_in_single_buf:1;
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unsigned request_body_in_file_only:1;
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} ngx_http_modsecurity_ctx_t;
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/*
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** Module's registred function/handlers.
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*/
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static ngx_int_t ngx_http_modsecurity_handler(ngx_http_request_t *r);
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static void ngx_http_modsecurity_request_body_handler(ngx_http_request_t *r);
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//static ngx_int_t ngx_http_modsecurity_init(ngx_conf_t *cf);
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static ngx_int_t ngx_http_modsecurity_init_process(ngx_cycle_t *cycle);
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static void ngx_http_modsecurity_exit_process(ngx_cycle_t *cycle);
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static void *ngx_http_modsecurity_create_loc_conf(ngx_conf_t *cf);
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static char *ngx_http_modsecurity_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child);
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static char *ngx_http_modsecurity_set_config(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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apr_status_t modsecurity_read_body_cb(request_rec *r, char *buf, unsigned int length,
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unsigned int *readcnt, int *is_eos);
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static char *ngx_http_modsecurity_add_handler(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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static char *ngx_http_modsecurity_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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static ngx_int_t ngx_http_modsecurity_pass_to_backend(ngx_http_request_t *r);
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static int ngx_http_modsecurity_drop_action(request_rec *r);
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static void ngx_http_modsecurity_cleanup(void *data);
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/* command handled by the module */
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static ngx_command_t ngx_http_modsecurity_commands[] = {
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{ ngx_string("ModSecurityConfig"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_http_modsecurity_set_config,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("ModSecurityEnabled"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF
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|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
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ngx_http_modsecurity_add_handler,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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{ ngx_string("ModSecurityPass"),
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NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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ngx_http_modsecurity_pass,
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NGX_HTTP_LOC_CONF_OFFSET,
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0,
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NULL },
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ngx_null_command
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};
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/*
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** handlers for configuration phases of the module
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*/
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static ngx_http_module_t ngx_http_modsecurity_ctx = {
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NULL, /* preconfiguration */
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// ngx_http_modsecurity_init, /* postconfiguration */
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NULL,
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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ngx_http_modsecurity_create_loc_conf, /* create location configuration */
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ngx_http_modsecurity_merge_loc_conf /* merge location configuration */
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};
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ngx_module_t ngx_http_modsecurity = {
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NGX_MODULE_V1,
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&ngx_http_modsecurity_ctx, /* module context */
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ngx_http_modsecurity_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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ngx_http_modsecurity_init_process, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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ngx_http_modsecurity_exit_process, /* 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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/* create loc conf struct */
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static void *
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ngx_http_modsecurity_create_loc_conf(ngx_conf_t *cf)
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{
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ngx_http_modsecurity_loc_conf_t *conf;
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conf = (ngx_http_modsecurity_loc_conf_t *) ngx_pcalloc(cf->pool, sizeof(ngx_http_modsecurity_loc_conf_t));
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if (conf == NULL)
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return NULL;
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conf->enable = NGX_CONF_UNSET;
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return conf;
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}
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/* merge loc conf */
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static char *
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ngx_http_modsecurity_merge_loc_conf(ngx_conf_t *cf, void *parent,
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void *child)
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{
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ngx_http_modsecurity_loc_conf_t *prev = parent;
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ngx_http_modsecurity_loc_conf_t *conf = child;
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if (conf->config == NULL) {
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conf->config = prev->config;
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}
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/*
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if (conf->config_path == NULL) {
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conf->config_path = prev->config_path;
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}
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*/
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if ((conf->url.len == 0) && (conf->url_cv == NULL)) {
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conf->url = prev->url;
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conf->url_cv = prev->url_cv;
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}
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ngx_conf_merge_uint_value(conf->enable, prev->enable, 0);
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return NGX_CONF_OK;
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}
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void
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modsecLog(void *obj, int level, char *str)
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{
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if (obj != NULL)
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ngx_log_error(NGX_LOG_INFO, (ngx_log_t *)obj, 0, "%s", str);
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}
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#ifdef PROCESS_RESPONSE
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/*
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** This function sets up handlers for CONTENT_PHASE,
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** XXX: not implemented yet
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*/
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static ngx_int_t
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ngx_http_modsecurity_init(ngx_conf_t *cf)
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{
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ngx_http_handler_pt *h;
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ngx_http_core_main_conf_t *cmcf;
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cmcf = (ngx_http_core_main_conf_t *) ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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if (cmcf == NULL) {
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return NGX_ERROR;
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}
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/* Register for CONTENT phase */
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h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
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if (h == NULL) {
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return NGX_ERROR;
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}
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*h = ngx_http_modsecurity_content_handler;
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return NGX_OK;
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}
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#endif
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static ngx_int_t
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ngx_http_modsecurity_init_process(ngx_cycle_t *cycle)
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{
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cycle->log->log_level = NGX_LOG_INFO;
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modsecSetLogHook(cycle->log, modsecLog);
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modsecSetDropAction(ngx_http_modsecurity_drop_action);
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modsecSetReadBody(modsecurity_read_body_cb);
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modsecInit();
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/* config was already parsed in master process */
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// modsecStartConfig();
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// modsecFinalizeConfig();
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modsecInitProcess();
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return NGX_OK;
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}
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static void
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ngx_http_modsecurity_exit_process(ngx_cycle_t *cycle)
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{
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modsecTerminate();
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}
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/*
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** This is a temporary hack to make PCRE work with ModSecurity
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** nginx hijacks pcre_malloc and pcre_free, so we have to re-hijack them
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*/
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extern apr_pool_t *pool;
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void *
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modsec_pcre_malloc(size_t size)
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{
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return apr_palloc(pool, size);
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}
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void
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modsec_pcre_free(void *ptr)
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{
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}
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char *
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ConvertNgxStringToUTF8(ngx_str_t str, apr_pool_t *pool)
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{
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char *t = (char *) apr_palloc(pool, str.len + 1);
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ngx_memcpy(t, str.data, str.len);
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t[str.len] = 0;
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return t;
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}
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static ngx_int_t
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ngx_http_modsecurity_pass_to_backend(ngx_http_request_t *r)
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{
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ngx_str_t uri;
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ngx_str_t args;
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ngx_uint_t flags;
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ngx_http_modsecurity_ctx_t *ctx;
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ngx_http_modsecurity_loc_conf_t *cf;
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ngx_int_t rc;
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"modSecurity: pass_to_backend");
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cf = ngx_http_get_module_loc_conf(r, ngx_http_modsecurity);
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if (!cf) {
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return NGX_ERROR;
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}
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ctx = ngx_http_get_module_ctx(r, ngx_http_modsecurity);
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if (ctx == NULL) {
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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if (cf->enable) {
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int status = modsecProcessRequest(ctx->req);
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// modsecFinishRequest(r);
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if (status != DECLINED) {
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "ModSecurity: status: %d, need action", status);
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ngx_http_clear_accept_ranges(r);
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ngx_http_clear_last_modified(r);
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ngx_http_clear_content_length(r);
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/* XXX: return correct status */
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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}
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args = r->args; /* forward the query args */
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flags = 0;
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if (cf->url_cv) {
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/* complex value */
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if (ngx_http_complex_value(r, cf->url_cv, &uri) != NGX_OK) {
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: uri parsing error #2");
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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if (uri.len == 0) {
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"empty \"upload_pass\" (was: \"%V\")",
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&cf->url_cv->value);
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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} else {
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/* simple value */
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uri = cf->url;
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}
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if (ngx_http_parse_unsafe_uri(r, &uri, &args, &flags) != NGX_OK) {
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: uri parsing error");
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return NGX_HTTP_INTERNAL_SERVER_ERROR;
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}
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if (uri.len != 0 && uri.data[0] == '/') {
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: using internal redirect");
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rc = ngx_http_internal_redirect(r, &uri, &args);
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} else {
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: using named location");
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rc = ngx_http_named_location(r, &uri);
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}
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return rc;
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}
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/*
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** request body callback, passing body to mod security
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*/
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apr_status_t
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modsecurity_read_body_cb(request_rec *r, char *outpos, unsigned int length,
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unsigned int *outlen, int *is_eos)
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{
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size_t len, rest;
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ssize_t size;
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ngx_http_modsecurity_ctx_t *ctx;
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ctx = (ngx_http_modsecurity_ctx_t *) apr_table_get(r->notes, NOTE_NGINX_REQUEST_CTX);
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if (ctx == NULL) {
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return APR_EINVAL;
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}
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ctx->r->connection->log, 0, "modSecurity: read_body_cb");
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ngx_buf_t *buf = &ctx->buf;
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rest = length;
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*is_eos = 0;
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while (rest) {
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if (ngx_buf_size(buf) == 0) {
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if (ctx->chain == NULL) {
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*outlen = length - rest;
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*is_eos = 1;
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// END
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return APR_SUCCESS;
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}
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ngx_memcpy(buf, ctx->chain->buf, sizeof(ngx_buf_t));
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ctx->chain = ctx->chain->next;
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}
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len = (size_t) ngx_min((size_t)ngx_buf_size(buf), rest);
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if (ngx_buf_in_memory(buf)) {
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outpos = (char *) ngx_cpymem(outpos, buf->pos, len);
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rest -= len;
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buf->pos += len;
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} else if (buf->in_file) {
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size = ngx_read_file(buf->file, (u_char*)outpos, len, buf->file_pos);
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if (size < 0) {
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return NGX_ERROR;
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}
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outpos += size;
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rest -= size;
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buf->file_pos += size;
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} else {
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return -1;
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}
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}
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*outlen = length - rest;
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return APR_SUCCESS;
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}
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apr_sockaddr_t *CopySockAddr(apr_pool_t *pool, struct sockaddr *pAddr) {
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apr_sockaddr_t *addr = (apr_sockaddr_t *)apr_palloc(pool, sizeof(apr_sockaddr_t));
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int adrlen = 16, iplen = 4;
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if(pAddr->sa_family == AF_INET6) {
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adrlen = 46;
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iplen = 16;
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}
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addr->addr_str_len = adrlen;
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addr->family = pAddr->sa_family;
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addr->hostname = "unknown";
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#ifdef WIN32
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addr->ipaddr_len = sizeof(IN_ADDR);
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#else
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addr->ipaddr_len = sizeof(struct in_addr);
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#endif
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addr->ipaddr_ptr = &addr->sa.sin.sin_addr;
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addr->pool = pool;
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addr->port = 80;
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#ifdef WIN32
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memcpy(&addr->sa.sin.sin_addr.S_un.S_addr, pAddr->sa_data, iplen);
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#else
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memcpy(&addr->sa.sin.sin_addr.s_addr, pAddr->sa_data, iplen);
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#endif
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addr->sa.sin.sin_family = pAddr->sa_family;
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addr->sa.sin.sin_port = 80;
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addr->salen = sizeof(addr->sa);
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addr->servname = addr->hostname;
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return addr;
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}
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/*
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** [ENTRY POINT] does : this function called by nginx from the request handler
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*/
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static ngx_int_t
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ngx_http_modsecurity_handler(ngx_http_request_t *r)
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{
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ngx_http_modsecurity_loc_conf_t *cf;
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ngx_http_core_loc_conf_t *clcf, *lcf;
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ngx_http_modsecurity_ctx_t *ctx;
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ngx_list_part_t *part;
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ngx_table_elt_t *h;
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ngx_uint_t i;
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ngx_int_t rc;
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void **loc_conf;
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ngx_pool_cleanup_t *cln;
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: handler");
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/* Process only main request */
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if (r != r->main || r->internal) {
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return NGX_DECLINED;
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}
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cf = ngx_http_get_module_loc_conf(r, ngx_http_modsecurity);
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if (!cf) {
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return NGX_ERROR;
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}
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/* XXX: temporary hack, nginx uses pcre as well and hijacks these two */
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pcre_malloc = modsec_pcre_malloc;
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pcre_free = modsec_pcre_free;
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ctx = ngx_http_get_module_ctx(r, ngx_http_modsecurity);
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if (ctx == NULL) {
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ctx = (ngx_http_modsecurity_ctx_t *) ngx_pcalloc(r->pool, sizeof(ngx_http_modsecurity_ctx_t));
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if (ctx == NULL) {
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ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "modSecurity: ctx memory allocation error");
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return NGX_ERROR;
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}
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ctx->r = r;
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ngx_http_set_ctx(r, ctx, ngx_http_modsecurity);
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}
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/* do all modsecurity related work only if handler is enabled */
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if (cf->enable) {
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if (r->connection->requests == 0 || ctx->connection == NULL) {
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ctx->connection = modsecNewConnection();
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#if AP_SERVER_MAJORVERSION_NUMBER > 1 && AP_SERVER_MINORVERSION_NUMBER < 3
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||
ctx->connection->remote_addr = CopySockAddr(ctx->connection->pool, r->connection->sockaddr);
|
||
ctx->connection->remote_ip = ConvertNgxStringToUTF8(r->connection->addr_text, ctx->connection->pool);
|
||
#else
|
||
ctx->connection->client_addr = CopySockAddr(ctx->connection->pool, r->connection->sockaddr);
|
||
ctx->connection->client_ip = ConvertNgxStringToUTF8(r->connection->addr_text, ctx->connection->pool);
|
||
#endif
|
||
ctx->connection->remote_host = NULL;
|
||
modsecProcessConnection(ctx->connection);
|
||
}
|
||
|
||
/* cf->config was set in master process??? */
|
||
ctx->req = modsecNewRequest(ctx->connection, cf->config);
|
||
ctx->req->request_time = apr_time_now();
|
||
ctx->req->method = ConvertNgxStringToUTF8(r->method_name, ctx->req->pool);
|
||
ctx->req->path_info = ConvertNgxStringToUTF8(r->unparsed_uri, ctx->req->pool);
|
||
ctx->req->unparsed_uri = ConvertNgxStringToUTF8(r->unparsed_uri, ctx->req->pool);
|
||
ctx->req->uri = ctx->req->unparsed_uri;
|
||
ctx->req->the_request = ConvertNgxStringToUTF8(r->request_line, ctx->req->pool);
|
||
ctx->req->args = ConvertNgxStringToUTF8(r->args, ctx->req->pool);
|
||
ctx->req->filename = ctx->req->path_info;
|
||
|
||
ctx->req->parsed_uri.scheme = "http";
|
||
ctx->req->parsed_uri.path = ctx->req->path_info;
|
||
ctx->req->parsed_uri.is_initialized = 1;
|
||
ctx->req->parsed_uri.port = 80;
|
||
ctx->req->parsed_uri.port_str = "80";
|
||
ctx->req->parsed_uri.query = ctx->req->args;
|
||
ctx->req->parsed_uri.dns_looked_up = 0;
|
||
ctx->req->parsed_uri.dns_resolved = 0;
|
||
ctx->req->parsed_uri.password = NULL;
|
||
ctx->req->parsed_uri.user = NULL;
|
||
ctx->req->parsed_uri.fragment = ConvertNgxStringToUTF8(r->exten, ctx->req->pool);
|
||
|
||
part = &r->headers_in.headers.part;
|
||
h = part->elts;
|
||
|
||
for (i = 0; ; i++) {
|
||
if (i >= part->nelts) {
|
||
if (part->next == NULL)
|
||
break;
|
||
|
||
part = part->next;
|
||
h = part->elts;
|
||
i = 0;
|
||
}
|
||
|
||
apr_table_setn(ctx->req->headers_in, ConvertNgxStringToUTF8(h[i].key, ctx->req->pool),
|
||
ConvertNgxStringToUTF8(h[i].value, ctx->req->pool));
|
||
}
|
||
|
||
/* XXX: if mod_uniqid enabled - use it's value */
|
||
apr_table_setn(ctx->req->subprocess_env, "UNIQUE_ID", "12345");
|
||
/* actually, we need ctx only for POST request body handling - don't like this part */
|
||
apr_table_setn(ctx->req->notes, NOTE_NGINX_REQUEST_CTX, (const char *) ctx);
|
||
|
||
/* add cleanup */
|
||
cln = ngx_pool_cleanup_add(r->pool, 0);
|
||
if (cln == NULL) {
|
||
return NGX_ERROR;
|
||
}
|
||
cln->data = ctx;
|
||
cln->handler = ngx_http_modsecurity_cleanup;
|
||
}
|
||
|
||
// r->keepalive = 0;
|
||
if (r->method == NGX_HTTP_POST) {
|
||
/* Processing POST request body, should we process PUT? */
|
||
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: method POST");
|
||
|
||
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
||
|
||
if (clcf == NULL) {
|
||
return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
||
}
|
||
|
||
ctx->loc_conf = r->loc_conf;
|
||
/* hijack loc_conf so that we can receive any body length
|
||
* TODO: nonblocking process & chuncked body
|
||
*/
|
||
if (clcf->client_body_buffer_size < (size_t)r->headers_in.content_length_n) {
|
||
|
||
loc_conf = ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module);
|
||
if (loc_conf == NULL) {
|
||
return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
||
}
|
||
|
||
lcf = ngx_pcalloc(r->pool, sizeof(ngx_http_core_loc_conf_t));
|
||
if (lcf == NULL) {
|
||
return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
||
}
|
||
|
||
ngx_memcpy(loc_conf, r->loc_conf, sizeof(void *) * ngx_http_max_module);
|
||
ngx_memcpy(lcf, clcf, sizeof(ngx_http_core_loc_conf_t));
|
||
|
||
ctx->loc_conf = r->loc_conf;
|
||
r->loc_conf = loc_conf;
|
||
|
||
ngx_http_get_module_loc_conf(r, ngx_http_core_module) = lcf;
|
||
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
||
clcf->client_body_buffer_size = r->headers_in.content_length_n;
|
||
}
|
||
|
||
ctx->request_body_in_single_buf = r->request_body_in_single_buf;
|
||
ctx->request_body_in_file_only = r->request_body_in_file_only;
|
||
r->request_body_in_single_buf = 1;
|
||
r->request_body_in_file_only = 0;
|
||
|
||
rc = ngx_http_read_client_request_body(r, ngx_http_modsecurity_request_body_handler);
|
||
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
|
||
return rc;
|
||
}
|
||
|
||
return NGX_DONE;
|
||
|
||
} else {
|
||
/* processing all the other methods */
|
||
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: method is not POST");
|
||
|
||
rc = ngx_http_modsecurity_pass_to_backend(r);
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
|
||
static void
|
||
ngx_http_modsecurity_cleanup(void *data)
|
||
{
|
||
ngx_http_modsecurity_ctx_t *ctx = data;
|
||
|
||
if (ctx->req != NULL) {
|
||
(void) modsecFinishRequest(ctx->req);
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
ngx_http_modsecurity_request_body_handler(ngx_http_request_t *r)
|
||
{
|
||
ngx_http_modsecurity_ctx_t *ctx;
|
||
|
||
ctx = ngx_http_get_module_ctx(r, ngx_http_modsecurity);
|
||
|
||
if (ctx == NULL
|
||
|| r->request_body->bufs == NULL
|
||
|| r->request_body->bufs->next != NULL) {
|
||
ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
|
||
return;
|
||
}
|
||
|
||
r->request_body_in_single_buf = ctx->request_body_in_single_buf;
|
||
r->request_body_in_file_only = ctx->request_body_in_file_only;
|
||
r->header_in = r->request_body->bufs->buf;
|
||
ctx->chain = r->request_body->bufs;
|
||
r->request_body = NULL;
|
||
r->loc_conf = ctx->loc_conf;
|
||
|
||
ngx_http_finalize_request(r, ngx_http_modsecurity_pass_to_backend(r));
|
||
return;
|
||
}
|
||
|
||
|
||
static char *
|
||
ngx_http_modsecurity_set_config(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
||
{
|
||
ngx_http_modsecurity_loc_conf_t *mscf = conf;
|
||
ngx_str_t *value;
|
||
char *config_path;
|
||
const char *msg;
|
||
|
||
value = cf->args->elts;
|
||
|
||
if (cf->args->nelts == 0 || value[1].len == 0) {
|
||
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
||
"ModSecurity: config path required");
|
||
return NGX_CONF_ERROR;
|
||
}
|
||
|
||
if (ngx_conf_full_name(cf->cycle, &value[1], 1) != NGX_OK) {
|
||
return NGX_CONF_ERROR;
|
||
}
|
||
/*
|
||
** XXX: we need to check if file exists here
|
||
** b/c modsecurity standalone will segfault with non-existent file
|
||
*/
|
||
config_path = (char *) ngx_pcalloc(cf->pool, value[1].len + 1);
|
||
if (config_path == NULL) {
|
||
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
||
"ModSecurity: config path memory allocation error");
|
||
return NGX_CONF_ERROR;
|
||
}
|
||
ngx_memcpy(config_path, value[1].data, value[1].len);
|
||
|
||
pcre_malloc = modsec_pcre_malloc;
|
||
pcre_free = modsec_pcre_free;
|
||
|
||
cf->log->log_level = NGX_LOG_INFO;
|
||
|
||
modsecSetLogHook(cf->log, modsecLog);
|
||
|
||
modsecInit();
|
||
modsecStartConfig();
|
||
|
||
mscf->config = modsecGetDefaultConfig();
|
||
|
||
msg = modsecProcessConfig(mscf->config, config_path);
|
||
if (msg != NULL) {
|
||
ngx_conf_log_error(NGX_LOG_INFO, cf, 0, "modSecurity: modsecProcessConfig() %s", msg);
|
||
return NGX_CONF_ERROR;
|
||
}
|
||
|
||
// modsecFinalizeConfig();
|
||
|
||
return NGX_CONF_OK;
|
||
}
|
||
|
||
static char *
|
||
ngx_http_modsecurity_add_handler(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
||
{
|
||
ngx_http_core_loc_conf_t *clcf;
|
||
ngx_str_t *value;
|
||
ngx_http_modsecurity_loc_conf_t *mscf = conf;
|
||
|
||
value = cf->args->elts;
|
||
|
||
if (value[1].len == 0) {
|
||
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
||
"empty value in \"%V\" directive",
|
||
&cmd->name);
|
||
|
||
return NGX_CONF_ERROR;
|
||
}
|
||
|
||
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
|
||
clcf->handler = ngx_http_modsecurity_handler;
|
||
|
||
if (ngx_strcmp(value[1].data, "off") == 0) {
|
||
mscf->enable = 0;
|
||
return NGX_CONF_OK;
|
||
}
|
||
if (ngx_strcmp(value[1].data, "on") == 0) {
|
||
mscf->enable = 1;
|
||
return NGX_CONF_OK;
|
||
}
|
||
|
||
return NGX_CONF_OK;
|
||
}
|
||
|
||
static char *
|
||
ngx_http_modsecurity_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
||
{
|
||
ngx_http_modsecurity_loc_conf_t *mscf = conf;
|
||
ngx_str_t *value;
|
||
ngx_http_compile_complex_value_t ccv;
|
||
|
||
if ((mscf->url.len != 0) || (mscf->url_cv != NULL)) {
|
||
return "is duplicate";
|
||
}
|
||
|
||
value = cf->args->elts;
|
||
|
||
if (value[1].len == 0) {
|
||
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
||
"empty value in \"%V\" directive",
|
||
&cmd->name);
|
||
|
||
return NGX_CONF_ERROR;
|
||
}
|
||
|
||
if (ngx_http_script_variables_count(&value[1])) {
|
||
/* complex value */
|
||
mscf->url_cv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
||
if (mscf->url_cv == NULL) {
|
||
return NGX_CONF_ERROR;
|
||
}
|
||
|
||
ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
||
|
||
ccv.cf = cf;
|
||
ccv.value = &value[1];
|
||
ccv.complex_value = mscf->url_cv;
|
||
|
||
if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
||
return NGX_CONF_ERROR;
|
||
}
|
||
} else {
|
||
/* simple value */
|
||
mscf->url = value[1];
|
||
}
|
||
|
||
return NGX_CONF_OK;
|
||
}
|
||
|
||
static int
|
||
ngx_http_modsecurity_drop_action(request_rec *r)
|
||
{
|
||
ngx_http_modsecurity_ctx_t *ctx;
|
||
ctx = (ngx_http_modsecurity_ctx_t *) apr_table_get(r->notes, NOTE_NGINX_REQUEST_CTX);
|
||
|
||
if (ctx == NULL) {
|
||
return -1;
|
||
}
|
||
ctx->r->connection->error = 1;
|
||
return 0;
|
||
}
|