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/*
* We are using this file to hold APIs copied from libhtp 0.5.x.
*/
/***************************************************************************
* 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.
***************************************************************************/
/**
* Anoop Saldanha <anoopsaldanha@gmail.com>
*/
#include "suricata.h"
#include "suricata-common.h"
/**
* \brief A direct flick off libhtp-0.5.x htp_is_lws().
*/
static int SC_htp_is_lws(int c)
{
if ((c == ' ') || (c == '\t')) return 1;
else return 0;
}
/**
* \brief A direct flick off libhtp-0.5.x htp_parse_positive_integer_whitespace().
*/
static int64_t SC_htp_parse_positive_integer_whitespace(unsigned char *data, size_t len, int base)
{
if (len == 0) return -1003;
size_t last_pos;
size_t pos = 0;
// Ignore LWS before
while ((pos < len) && (SC_htp_is_lws(data[pos]))) pos++;
if (pos == len) return -1001;
int64_t r = bstr_util_mem_to_pint(data + pos, len - pos, base, &last_pos);
if (r < 0) return r;
// Move after the last digit
pos += last_pos;
// Ignore LWS after
while (pos < len) {
if (!SC_htp_is_lws(data[pos])) {
return -1002;
}
pos++;
}
return r;
}
/**
* \brief A direct flick off libhtp-0.5.x htp_parse_content_length()
*/
int64_t SC_htp_parse_content_length(bstr *b)
{
return SC_htp_parse_positive_integer_whitespace((unsigned char *) bstr_ptr(b), bstr_len(b), 10);
}
/**
* \brief Generates the normalized uri.
*
* Libhtp doesn't recreate the whole normalized uri and save it.
* That duty has now been passed to us. A lot of this code has been
* copied from libhtp.
*
* Keep an eye out on the tx->parsed_uri struct and how the parameters
* in it are generated, just in case some modifications are made to
* them in the future.
*
* \param uri_include_all boolean to indicate if scheme, username/password,
hostname and port should be part of the buffer
*/
bstr *SCHTPGenerateNormalizedUri(htp_tx_t *tx, htp_uri_t *uri, int uri_include_all)
{
if (uri == NULL)
return NULL;
// On the first pass determine the length of the final string
size_t len = 0;
if (uri_include_all) {
if (uri->scheme != NULL) {
len += bstr_len(uri->scheme);
len += 3; // "://"
}
if ((uri->username != NULL) || (uri->password != NULL)) {
if (uri->username != NULL) {
len += bstr_len(uri->username);
}
len += 1; // ":"
if (uri->password != NULL) {
len += bstr_len(uri->password);
}
len += 1; // "@"
}
if (uri->hostname != NULL) {
len += bstr_len(uri->hostname);
}
if (uri->port != NULL) {
len += 1; // ":"
len += bstr_len(uri->port);
}
}
if (uri->path != NULL) {
len += bstr_len(uri->path);
}
if (uri->query != NULL) {
len += 1; // "?"
len += bstr_len(uri->query);
}
if (uri->fragment != NULL) {
len += 1; // "#"
len += bstr_len(uri->fragment);
}
// On the second pass construct the string
/* FIXME in memcap */
bstr *r = bstr_alloc(len);
if (r == NULL) {
return NULL;
}
if (uri_include_all) {
if (uri->scheme != NULL) {
bstr_add_noex(r, uri->scheme);
bstr_add_c_noex(r, "://");
}
if ((uri->username != NULL) || (uri->password != NULL)) {
if (uri->username != NULL) {
bstr_add_noex(r, uri->username);
}
bstr_add_c(r, ":");
if (uri->password != NULL) {
bstr_add_noex(r, uri->password);
}
bstr_add_c_noex(r, "@");
}
if (uri->hostname != NULL) {
bstr_add_noex(r, uri->hostname);
}
if (uri->port != NULL) {
bstr_add_c(r, ":");
bstr_add_noex(r, uri->port);
}
}
if (uri->path != NULL) {
bstr_add_noex(r, uri->path);
}
if (uri->query != NULL) {
bstr *query = bstr_dup(uri->query);
if (query) {
uint64_t flags = 0;
htp_urldecode_inplace(tx->cfg, HTP_DECODER_URLENCODED, query, &flags);
bstr_add_c_noex(r, "?");
bstr_add_noex(r, query);
bstr_free(query);
}
}
if (uri->fragment != NULL) {
bstr_add_c_noex(r, "#");
bstr_add_noex(r, uri->fragment);
}
return r;
}
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