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/***************************************************************************
* Copyright (c) 2009-2010 Open Information Security Foundation
* Copyright (c) 2010-2013 Qualys, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of the Qualys, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
/**
* @file
* @author Ivan Ristic <ivanr@webkreator.com>
*/
#include "htp_config_auto.h"
#include "htp_private.h"
/**
* Parses a single v0 request cookie and places the results into tx->request_cookies.
*
* @param[in] connp
* @param[in] data
* @param[in] len
* @return HTP_OK on success, HTP_ERROR on error.
*/
int htp_parse_single_cookie_v0(htp_connp_t *connp, unsigned char *data, size_t len) {
if (len == 0) return HTP_OK;
size_t pos = 0;
// Look for '='.
while ((pos < len) && (data[pos] != '=')) pos++;
if (pos == 0) return HTP_OK; // Ignore a nameless cookie.
bstr *name = bstr_dup_mem(data, pos);
if (name == NULL) return HTP_ERROR;
bstr *value = NULL;
if (pos == len) {
// The cookie is empty.
value = bstr_dup_c("");
} else {
// The cookie is not empty.
value = bstr_dup_mem(data + pos + 1, len - pos - 1);
}
if (value == NULL) {
bstr_free(name);
return HTP_ERROR;
}
htp_table_addn(connp->in_tx->request_cookies, name, value);
return HTP_OK;
}
/**
* Parses the Cookie request header in v0 format.
*
* @param[in] connp
* @return HTP_OK on success, HTP_ERROR on error
*/
htp_status_t htp_parse_cookies_v0(htp_connp_t *connp) {
htp_header_t *cookie_header = htp_table_get_c(connp->in_tx->request_headers, "cookie");
if (cookie_header == NULL) return HTP_OK;
// Create a new table to store cookies.
connp->in_tx->request_cookies = htp_table_create(4);
if (connp->in_tx->request_cookies == NULL) return HTP_ERROR;
unsigned char *data = bstr_ptr(cookie_header->value);
size_t len = bstr_len(cookie_header->value);
size_t pos = 0;
while (pos < len) {
// Ignore whitespace at the beginning.
while ((pos < len) && (isspace((int)data[pos]))) pos++;
if (pos == len) return HTP_OK;
size_t start = pos;
// Find the end of the cookie.
while ((pos < len) && (data[pos] != ';')) pos++;
if (htp_parse_single_cookie_v0(connp, data + start, pos - start) != HTP_OK) {
return HTP_ERROR;
}
// Go over the semicolon.
if (pos < len) pos++;
}
return HTP_OK;
}
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