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/*
* ModSecurity for Apache 2.x, http://www.modsecurity.org/
* Copyright (c) 2004-2013 Trustwave Holdings, Inc. (http://www.trustwave.com/)
*
* You may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* If any of the files related to licensing are missing or if you have any
* other questions related to licensing please contact Trustwave Holdings, Inc.
* directly using the email address security@modsecurity.org.
*/
#include "msc_unicode.h"
#define CODEPAGE_SEPARATORS " \t\n\r"
/** \brief Load Unicode file
*
* \param dcfg Pointer to directory configuration
* \param error_msg Error message
*
* \retval 1 On Success
* \retval 0 On Fail
*/
static int unicode_map_create(directory_config *dcfg, char **error_msg)
{
char errstr[1024];
apr_pool_t *mp = dcfg->mp;
unicode_map *u_map = dcfg->u_map;
apr_int32_t wanted = APR_FINFO_SIZE;
apr_finfo_t finfo;
apr_status_t rc;
apr_size_t nbytes;
unsigned int codepage = 0;
char *buf = NULL, *p = NULL, *savedptr = NULL;
char *ucode = NULL, *hmap = NULL;
int found = 0, processing = 0;
int Code = 0, Map = 0;
if(unicode_map_table != NULL) {
free(unicode_map_table);
unicode_map_table = NULL;
}
if ((rc = apr_file_open(&u_map->map, u_map->mapfn, APR_READ, APR_OS_DEFAULT, mp)) != APR_SUCCESS) {
*error_msg = apr_psprintf(mp, "Could not open unicode map file \"%s\": %s", u_map->mapfn, apr_strerror(rc, errstr, 1024));
return 0;
}
if ((rc = apr_file_info_get(&finfo, wanted, u_map->map)) != APR_SUCCESS) {
*error_msg = apr_psprintf(mp, "Could not cannot get unicode map file information \"%s\": %s", u_map->mapfn, apr_strerror(rc, errstr, 1024));
apr_file_close(u_map->map);
return 0;
}
buf = (char *)malloc(finfo.size+1);
if (buf == NULL) {
*error_msg = apr_psprintf(mp, "Could not alloc memory for unicode map");
apr_file_close(u_map->map);
return 0;
}
rc = apr_file_read_full(u_map->map, buf, finfo.size, &nbytes);
if (unicode_map_table != NULL) {
memset(unicode_map_table, -1, (sizeof(int)*65536));
} else {
unicode_map_table = (int *)malloc(sizeof(int) * 65536);
if(unicode_map_table == NULL) {
*error_msg = apr_psprintf(mp, "Could not alloc memory for unicode map");
free(buf);
buf = NULL;
apr_file_close(u_map->map);
return 0;
}
memset(unicode_map_table, -1, (sizeof(int)*65536));
}
/* Setting some unicode values - http://tools.ietf.org/html/rfc3490#section-3.1 */
/* Set 0x3002 -> 0x2e */
unicode_map_table[0x3002] = 0x2e;
/* Set 0xFF61 -> 0x2e */
unicode_map_table[0xff61] = 0x2e;
/* Set 0xFF0E -> 0x2e */
unicode_map_table[0xff0e] = 0x2e;
/* Set 0x002E -> 0x2e */
unicode_map_table[0x002e] = 0x2e;
p = apr_strtok(buf,CODEPAGE_SEPARATORS,&savedptr);
while (p != NULL) {
codepage = atol(p);
if (codepage == unicode_codepage) {
found = 1;
}
if (found == 1 && (strchr(p,':') != NULL)) {
char *mapping = strdup(p);
processing = 1;
if(mapping != NULL) {
ucode = apr_strtok(mapping,":", &hmap);
sscanf(ucode,"%x",&Code);
sscanf(hmap,"%x",&Map);
if(Code >= 0 && Code <= 65535) {
unicode_map_table[Code] = Map;
}
free(mapping);
mapping = NULL;
}
}
if (processing == 1 && (strchr(p,':') == NULL)) {
free(buf);
buf = NULL;
break;
}
p = apr_strtok(NULL,CODEPAGE_SEPARATORS,&savedptr);
}
apr_file_close(u_map->map);
if(buf) {
free(buf);
buf = NULL;
}
return 1;
}
/** \brief Init unicode map
*
* \param dcfg Pointer to directory configuration
* \param mapfn Unicode map filename
* \param error_msg Error message
*
* \retval unicode_map_create On Success
* \retval -1 On Fail
*/
int unicode_map_init(directory_config *dcfg, const char *mapfn, char **error_msg)
{
*error_msg = NULL;
if ((dcfg->u_map == NULL) || (dcfg->u_map == NOT_SET_P)) {
dcfg->u_map = apr_pcalloc(dcfg->mp, sizeof(unicode_map));
if (dcfg->u_map == NULL) {
return -1;
}
}
dcfg->u_map->map = NULL;
dcfg->u_map->mapfn = apr_pstrdup(dcfg->mp, mapfn);
return unicode_map_create(dcfg, error_msg);
}
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