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Merge pull request #27 from chaizhenhua/read_client_request_body

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remove Nginx ModSecurityPass command
This commit is contained in:
Breno Silva 2013-01-11 11:50:43 -08:00
commit 54245c9248
3 changed files with 282 additions and 385 deletions
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660
nginx/modsecurity/ngx_http_modsecurity.c
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@ -29,21 +29,12 @@
#define NOTE_NGINX_REQUEST_CTX "nginx-ctx"
extern ngx_module_t ngx_http_modsecurity;
struct ngx_http_modsecurity_ctx_s;
typedef ngx_int_t (*ngx_http_request_body_data_handler_pt)
(struct ngx_http_modsecurity_ctx_s*, u_char *, u_char*);
typedef struct {
ngx_uint_t enable;
ngx_flag_t enable;
directory_config *config;
ngx_str_t url;
ngx_http_complex_value_t *url_cv;
} ngx_http_modsecurity_loc_conf_t;
typedef struct ngx_http_modsecurity_ctx_s {
typedef struct {
ngx_http_request_t *r;
conn_rec *connection;
request_rec *req;
@ -58,45 +49,37 @@ typedef struct ngx_http_modsecurity_ctx_s {
/*
** Module's registred function/handlers.
*/
static ngx_int_t ngx_http_modsecurity_handler(ngx_http_request_t *r);
static ngx_int_t ngx_http_modsecurity_handler(ngx_http_request_t *r);
static void ngx_http_modsecurity_request_body_handler(ngx_http_request_t *r);
//static ngx_int_t ngx_http_modsecurity_init(ngx_conf_t *cf);
static ngx_int_t ngx_http_modsecurity_init_process(ngx_cycle_t *cycle);
static ngx_int_t ngx_http_modsecurity_preconfiguration(ngx_conf_t *cf);
static ngx_int_t ngx_http_modsecurity_init(ngx_conf_t *cf);
static ngx_int_t ngx_http_modsecurity_init_process(ngx_cycle_t *cycle);
static void ngx_http_modsecurity_exit_process(ngx_cycle_t *cycle);
static void *ngx_http_modsecurity_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_modsecurity_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child);
static char *ngx_http_modsecurity_set_config(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
apr_status_t modsecurity_read_body_cb(request_rec *r, char *buf, unsigned int length,
static char *ngx_http_modsecurity_config(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
apr_status_t modsecurity_read_body_cb(request_rec *r, char *buf, unsigned int length,
unsigned int *readcnt, int *is_eos);
apr_status_t modsecurity_write_body_cb(request_rec *rec, char *buf, unsigned int length);
static char *ngx_http_modsecurity_add_handler(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char *ngx_http_modsecurity_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static ngx_int_t ngx_http_modsecurity_pass_to_backend(ngx_http_request_t *r);
static ngx_http_modsecurity_ctx_t * ngx_http_modsecurity_create_ctx(ngx_http_request_t *r);
static int ngx_http_modsecurity_drop_action(request_rec *r);
static void ngx_http_modsecurity_cleanup(void *data);
/* command handled by the module */
static ngx_command_t ngx_http_modsecurity_commands[] = {
{ ngx_string("ModSecurityConfig"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_http_modsecurity_set_config,
ngx_http_modsecurity_config,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("ModSecurityEnabled"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF
|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
ngx_http_modsecurity_add_handler,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("ModSecurityPass"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_http_modsecurity_pass,
NGX_HTTP_LOC_CONF_OFFSET,
0,
offsetof(ngx_http_modsecurity_loc_conf_t, enable),
NULL },
ngx_null_command
};
@ -106,9 +89,8 @@ static ngx_command_t ngx_http_modsecurity_commands[] = {
*/
static ngx_http_module_t ngx_http_modsecurity_ctx = {
NULL, /* preconfiguration */
// ngx_http_modsecurity_init, /* postconfiguration */
NULL,
ngx_http_modsecurity_preconfiguration, /* preconfiguration */
ngx_http_modsecurity_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
@ -132,10 +114,11 @@ ngx_module_t ngx_http_modsecurity = {
NULL, /* init thread */
NULL, /* exit thread */
ngx_http_modsecurity_exit_process, /* exit process */
NULL, /* exit master */
ngx_http_modsecurity_exit_process, /* exit master */
NGX_MODULE_V1_PADDING
};
/* create loc conf struct */
static void *
ngx_http_modsecurity_create_loc_conf(ngx_conf_t *cf)
@ -163,17 +146,7 @@ ngx_http_modsecurity_merge_loc_conf(ngx_conf_t *cf, void *parent,
conf->config = prev->config;
}
/*
if (conf->config_path == NULL) {
conf->config_path = prev->config_path;
}
*/
if ((conf->url.len == 0) && (conf->url_cv == NULL)) {
conf->url = prev->url;
conf->url_cv = prev->url_cv;
}
ngx_conf_merge_uint_value(conf->enable, prev->enable, 0);
ngx_conf_merge_value(conf->enable, prev->enable, 0);
return NGX_CONF_OK;
}
@ -181,60 +154,13 @@ ngx_http_modsecurity_merge_loc_conf(ngx_conf_t *cf, void *parent,
void
modsecLog(void *obj, int level, char *str)
{
if (obj != NULL)
ngx_log_error(NGX_LOG_INFO, (ngx_log_t *)obj, 0, "%s", str);
}
#ifdef PROCESS_RESPONSE
/*
** This function sets up handlers for CONTENT_PHASE,
** XXX: not implemented yet
*/
static ngx_int_t
ngx_http_modsecurity_init(ngx_conf_t *cf)
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = (ngx_http_core_main_conf_t *) ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
if (cmcf == NULL) {
return NGX_ERROR;
if (obj != NULL) {
level = (level & APLOG_LEVELMASK) + NGX_LOG_EMERG - APLOG_EMERG;
if (level > NGX_LOG_DEBUG) {
level = NGX_LOG_DEBUG;
}
ngx_log_error((ngx_uint_t)level, (ngx_log_t *)obj, 0, "%s", str);
}
/* Register for CONTENT phase */
h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_modsecurity_content_handler;
return NGX_OK;
}
#endif
static ngx_int_t
ngx_http_modsecurity_init_process(ngx_cycle_t *cycle)
{
cycle->log->log_level = NGX_LOG_INFO;
modsecSetLogHook(cycle->log, modsecLog);
modsecSetDropAction(ngx_http_modsecurity_drop_action);
modsecSetReadBody(modsecurity_read_body_cb);
modsecInit();
/* config was already parsed in master process */
// modsecStartConfig();
// modsecFinalizeConfig();
modsecInitProcess();
return NGX_OK;
}
static void
ngx_http_modsecurity_exit_process(ngx_cycle_t *cycle)
{
modsecTerminate();
}
/*
@ -254,6 +180,77 @@ modsec_pcre_free(void *ptr)
{
}
static ngx_int_t
ngx_http_modsecurity_preconfiguration(ngx_conf_t *cf)
{
/* XXX: temporary hack, nginx uses pcre as well and hijacks these two */
pcre_malloc = modsec_pcre_malloc;
pcre_free = modsec_pcre_free;
modsecSetLogHook(cf->log, modsecLog);
modsecSetDropAction(ngx_http_modsecurity_drop_action);
modsecSetReadBody(modsecurity_read_body_cb);
modsecSetWriteBody(modsecurity_write_body_cb);
modsecInit();
modsecStartConfig();
return NGX_OK;
}
static ngx_int_t
ngx_http_modsecurity_init(ngx_conf_t *cf)
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
modsecFinalizeConfig();
cmcf = (ngx_http_core_main_conf_t *) ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
if (cmcf == NULL) {
return NGX_ERROR;
}
h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_modsecurity_handler;
#ifdef PROCESS_RESPONSE
/*
** This function sets up handlers for CONTENT_PHASE,
** XXX: not implemented yet
*/
/* Register for CONTENT phase ?? */
h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_modsecurity_content_handler;
#endif
return NGX_OK;
}
static ngx_int_t
ngx_http_modsecurity_init_process(ngx_cycle_t *cycle)
{
modsecSetLogHook(cycle->log, modsecLog);
modsecInitProcess();
return NGX_OK;
}
static void
ngx_http_modsecurity_exit_process(ngx_cycle_t *cycle)
{
modsecTerminate();
}
char *
ConvertNgxStringToUTF8(ngx_str_t str, apr_pool_t *pool)
{
@ -265,84 +262,6 @@ ConvertNgxStringToUTF8(ngx_str_t str, apr_pool_t *pool)
return t;
}
static ngx_int_t
ngx_http_modsecurity_pass_to_backend(ngx_http_request_t *r)
{
ngx_str_t uri;
ngx_str_t args;
ngx_uint_t flags;
ngx_http_modsecurity_ctx_t *ctx;
ngx_http_modsecurity_loc_conf_t *cf;
ngx_int_t rc;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"modSecurity: pass_to_backend");
cf = ngx_http_get_module_loc_conf(r, ngx_http_modsecurity);
if (!cf) {
return NGX_ERROR;
}
ctx = ngx_http_get_module_ctx(r, ngx_http_modsecurity);
if (ctx == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (cf->enable) {
int status = modsecProcessRequest(ctx->req);
// modsecFinishRequest(r);
if (status != DECLINED) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "ModSecurity: status: %d, need action", status);
ngx_http_clear_accept_ranges(r);
ngx_http_clear_last_modified(r);
ngx_http_clear_content_length(r);
/* XXX: return correct status */
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
args = r->args; /* forward the query args */
flags = 0;
if (cf->url_cv) {
/* complex value */
if (ngx_http_complex_value(r, cf->url_cv, &uri) != NGX_OK) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: uri parsing error #2");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (uri.len == 0) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"empty \"upload_pass\" (was: \"%V\")",
&cf->url_cv->value);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
} else {
/* simple value */
uri = cf->url;
}
if (ngx_http_parse_unsafe_uri(r, &uri, &args, &flags) != NGX_OK) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: uri parsing error");
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (uri.len != 0 && uri.data[0] == '/') {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: using internal redirect");
rc = ngx_http_internal_redirect(r, &uri, &args);
} else {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: using named location");
rc = ngx_http_named_location(r, &uri);
}
return rc;
}
/*
** request body callback, passing body to mod security
*/
@ -404,6 +323,52 @@ modsecurity_read_body_cb(request_rec *r, char *outpos, unsigned int length,
return APR_SUCCESS;
}
apr_status_t
modsecurity_write_body_cb(request_rec *rec, char *buf, unsigned int length)
{
ngx_buf_t *b;
ngx_http_modsecurity_ctx_t *ctx;
ngx_http_request_t *r;
ngx_str_t *str;
ctx = (ngx_http_modsecurity_ctx_t *) apr_table_get(rec->notes, NOTE_NGINX_REQUEST_CTX);
if (ctx == NULL) {
return APR_EINVAL;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ctx->r->connection->log, 0, "modSecurity: write_body_cb");
r = ctx->r;
/* set request body */
b = r->header_in;
if (b->end < b->pos + length) {
b->start = ngx_palloc(ctx->r->pool, length);
if (b->start == NULL) {
return APR_EINVAL;
}
b->end = b->start + length;
b->pos = b->start;
}
b->last = ngx_cpymem(b->pos, buf, length);
/* set content_length_n */
r->headers_in.content_length_n = length;
/* set headers_in.content_length */
str = &r->headers_in.content_length->value;
str->data = ngx_palloc(r->pool, NGX_OFF_T_LEN);
if (str->data == NULL) {
return NGX_ERROR;
}
str->len = ngx_snprintf(str->data, NGX_OFF_T_LEN, "%O", length) - str->data;
return APR_SUCCESS;
}
apr_sockaddr_t *CopySockAddr(apr_pool_t *pool, struct sockaddr *pAddr) {
apr_sockaddr_t *addr = (apr_sockaddr_t *)apr_palloc(pool, sizeof(apr_sockaddr_t));
int adrlen = 16, iplen = 4;
@ -448,12 +413,8 @@ ngx_http_modsecurity_handler(ngx_http_request_t *r)
ngx_http_modsecurity_loc_conf_t *cf;
ngx_http_core_loc_conf_t *clcf, *lcf;
ngx_http_modsecurity_ctx_t *ctx;
ngx_list_part_t *part;
ngx_table_elt_t *h;
ngx_uint_t i;
ngx_int_t rc;
void **loc_conf;
ngx_pool_cleanup_t *cln;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "modSecurity: handler");
@ -463,95 +424,17 @@ ngx_http_modsecurity_handler(ngx_http_request_t *r)
}
cf = ngx_http_get_module_loc_conf(r, ngx_http_modsecurity);
if (!cf) {
if (!cf->enable) {
return NGX_DECLINED;
}
ctx = ngx_http_modsecurity_create_ctx(r);
if (ctx == NULL) {
return NGX_ERROR;
}
/* XXX: temporary hack, nginx uses pcre as well and hijacks these two */
pcre_malloc = modsec_pcre_malloc;
pcre_free = modsec_pcre_free;
ctx = ngx_http_get_module_ctx(r, ngx_http_modsecurity);
if (ctx == NULL) {
ctx = (ngx_http_modsecurity_ctx_t *) ngx_pcalloc(r->pool, sizeof(ngx_http_modsecurity_ctx_t));
if (ctx == NULL) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "modSecurity: ctx memory allocation error");
return NGX_ERROR;
}
ctx->r = r;
ngx_http_set_ctx(r, ctx, ngx_http_modsecurity);
}
/* do all modsecurity related work only if handler is enabled */
if (cf->enable) {
if (r->connection->requests == 0 || ctx->connection == NULL) {
ctx->connection = modsecNewConnection();
#if AP_SERVER_MAJORVERSION_NUMBER > 1 && AP_SERVER_MINORVERSION_NUMBER < 3
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;
ngx_http_set_ctx(r, ctx, ngx_http_modsecurity);
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");
@ -566,7 +449,7 @@ ngx_http_modsecurity_handler(ngx_http_request_t *r)
/* hijack loc_conf so that we can receive any body length
* TODO: nonblocking process & chuncked body
*/
if (clcf->client_body_buffer_size < r->headers_in.content_length_n) {
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) {
@ -605,10 +488,105 @@ ngx_http_modsecurity_handler(ngx_http_request_t *r)
/* 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);
rc = modsecProcessRequest(ctx->req);
if (rc != DECLINED) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "ModSecurity: status: %d, need action", rc);
ngx_http_clear_accept_ranges(r);
ngx_http_clear_last_modified(r);
ngx_http_clear_content_length(r);
/* Nginx and Apache share same response code */
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
return rc;
}
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
return rc;
return NGX_DECLINED;
}
static ngx_http_modsecurity_ctx_t *
ngx_http_modsecurity_create_ctx(ngx_http_request_t *r)
{
ngx_http_modsecurity_loc_conf_t *cf;
ngx_pool_cleanup_t *cln;
ngx_http_modsecurity_ctx_t *ctx;
ngx_list_part_t *part;
ngx_table_elt_t *h;
ngx_uint_t i;
cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_http_modsecurity_ctx_t));
if (cln == NULL) {
ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "modSecurity: ctx memory allocation error");
return NULL;
}
cln->handler = ngx_http_modsecurity_cleanup;
ngx_memzero(cln->data, sizeof(ngx_http_modsecurity_ctx_t));
ctx = cln->data;
ctx->r = r;
if (r->connection->requests == 0 || ctx->connection == NULL) {
ctx->connection = modsecNewConnection();
#if AP_SERVER_MAJORVERSION_NUMBER > 1 && AP_SERVER_MINORVERSION_NUMBER < 3
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 = ngx_http_get_module_loc_conf(r, ngx_http_modsecurity);
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);
return ctx;
}
static void
@ -626,6 +604,7 @@ static void
ngx_http_modsecurity_request_body_handler(ngx_http_request_t *r)
{
ngx_http_modsecurity_ctx_t *ctx;
ngx_int_t rc;
ctx = ngx_http_get_module_ctx(r, ngx_http_modsecurity);
@ -643,137 +622,52 @@ ngx_http_modsecurity_request_body_handler(ngx_http_request_t *r)
r->request_body = NULL;
r->loc_conf = ctx->loc_conf;
ngx_http_finalize_request(r, ngx_http_modsecurity_pass_to_backend(r));
return;
rc = modsecProcessRequest(ctx->req);
if (rc != DECLINED) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "ModSecurity: status: %d, need action", rc);
ngx_http_clear_accept_ranges(r);
ngx_http_clear_last_modified(r);
ngx_http_clear_content_length(r);
/* Nginx and Apache share same response code */
if (rc < NGX_HTTP_SPECIAL_RESPONSE) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_http_finalize_request(r, rc);
}
r->phase_handler++;
ngx_http_core_run_phases(r);
ngx_http_finalize_request(r, NGX_DONE);
}
static char *
ngx_http_modsecurity_set_config(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
ngx_http_modsecurity_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)) {
if (mscf->config != 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);
if (ngx_conf_full_name(cf->cycle, &value[1], 1) != NGX_OK) {
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;
}
mscf->config = modsecGetDefaultConfig();
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];
msg = modsecProcessConfig(mscf->config, (const char *)value[1].data);
if (msg != NULL) {
ngx_conf_log_error(NGX_LOG_INFO, cf, 0, "modSecurity: modsecProcessConfig() %s", msg);
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;

6
standalone/api.c
View File

@ -216,6 +216,8 @@ apr_status_t ap_http_out_filter(ap_filter_t *f, apr_bucket_brigade *b) {
}
void modsecTerminate() {
apr_pool_destroy(pool);
pool = NULL;
apr_terminate();
}
@ -267,7 +269,7 @@ conn_rec *modsecNewConnection() {
apr_pool_create(&pc, pool);
c = apr_palloc(pc, sizeof(conn_rec));
c = apr_pcalloc(pc, sizeof(conn_rec));
c->base_server = server;
c->id = 1;
@ -300,7 +302,7 @@ request_rec *modsecNewRequest(conn_rec *connection, directory_config *config)
apr_pool_create(&pr, connection->pool);
r = apr_palloc(pr, sizeof(request_rec));
r = apr_pcalloc(pr, sizeof(request_rec));
r->connection = connection;
r->server = server;

1
standalone/server.c
View File

@ -992,6 +992,7 @@ AP_DECLARE(apr_status_t) unixd_set_proc_mutex_perms(apr_proc_mutex_t *pmutex)
#endif
union semun ick;
struct semid_ds buf;
memset(&buf,0,sizeof(buf));
apr_os_proc_mutex_get(&ospmutex, pmutex);
buf.sem_perm.uid = unixd_config.user_id;