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ssdeep.c
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ssdeep.c
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/**
*
* php_ssdeep
*
* http://treffynnon.github.com/php_ssdeep/
*
* A PHP extension to expose ssdeep functionality for fuzzy
* hashing and comparing.
*
* Version 1.1.1
*
* BSD Licensed.
*
* Copyright (c) 2018, Simon Holywell
* 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.
*
* 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 OWNER 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.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "SAPI.h"
#include "php_ssdeep.h"
#include <fuzzy.h>
/* For PHP 8 */
#ifndef TSRMLS_D
#define TSRMLS_D void
#define TSRMLS_DC
#define TSRMLS_C
#define TSRMLS_CC
#define TSRMLS_FETCH()
#endif
/* True global resources - no need for thread safety here */
ZEND_BEGIN_ARG_INFO_EX(arginfo_ssdeep_fuzzy_hash, 0, 0, 1)
ZEND_ARG_INFO(0, to_hash)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_ssdeep_fuzzy_hash_filename, 0, 0, 1)
ZEND_ARG_INFO(0, file_name)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_ssdeep_fuzzy_compare, 0, 0, 2)
ZEND_ARG_INFO(0, signature1)
ZEND_ARG_INFO(0, signature2)
ZEND_END_ARG_INFO()
/* {{{ ssdeep_functions[]
*/
const zend_function_entry ssdeep_functions[] = {
PHP_FE(ssdeep_fuzzy_hash, arginfo_ssdeep_fuzzy_hash)
PHP_FE(ssdeep_fuzzy_hash_filename, arginfo_ssdeep_fuzzy_hash_filename)
PHP_FE(ssdeep_fuzzy_compare, arginfo_ssdeep_fuzzy_compare)
#ifdef PHP_FE_END
PHP_FE_END
#else
{ NULL, NULL, NULL } /* Must be the last line in ssdeep_functions[] */
#endif
};
/* }}} */
/* {{{ PHP_MINFO_FUNCTION
*/
PHP_MINFO_FUNCTION(ssdeep) {
php_info_print_table_start();
php_info_print_table_row(2, PHP_SSDEEP_EXTNAME " Module", "enabled");
php_info_print_table_row(2, "version", PHP_SSDEEP_VERSION);
if (sapi_module.phpinfo_as_text) {
/* No HTML for you */
php_info_print_table_row(2, "By",
"Simon Holywell\nhttp://www.simonholywell.com");
} else {
/* HTMLified version */
php_printf("<tr>"
"<td class=\"v\">By</td>"
"<td class=\"v\">"
"<a href=\"http://www.simonholywell.com\""
" alt=\"Simon Holywell\">"
"Simon Holywell"
"</a></td></tr>");
}
php_info_print_table_end();
}
/* }}} */
/* {{{ proto string ssdeep_fuzzy_hash(string to_hash)
*/
PHP_FUNCTION(ssdeep_fuzzy_hash) {
char *hash = (char *) emalloc(FUZZY_MAX_RESULT);
char *to_hash;
strsize_t to_hash_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &to_hash, &to_hash_len) == FAILURE) {
RETURN_NULL();
}
if (0 != fuzzy_hash_buf((unsigned char *) to_hash, (uint32_t)to_hash_len, hash)) {
RETURN_FALSE;
} else {
_RETURN_STRING(hash);
}
}
/* }}} */
/* {{{ proto string ssdeep_fuzzy_hash_filename(string file_name)
*/
PHP_FUNCTION(ssdeep_fuzzy_hash_filename) {
char *hash = (char *) emalloc(FUZZY_MAX_RESULT);
char *file_name;
strsize_t file_name_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &file_name, &file_name_len) == FAILURE) {
RETURN_NULL();
}
if (0 != fuzzy_hash_filename(file_name, hash)) {
RETURN_FALSE;
} else {
_RETURN_STRING(hash);
}
}
/* }}} */
/* {{{ proto long ssdeep_fuzzy_compare(string signature1, string signature2)
*/
PHP_FUNCTION(ssdeep_fuzzy_compare) {
char *signature1 = NULL;
strsize_t signature1_len;
char *signature2 = NULL;
strsize_t signature2_len;
int match;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &signature1, &signature1_len, &signature2, &signature2_len) == FAILURE) {
RETURN_NULL();
}
match = fuzzy_compare(signature1, signature2);
if(match < 0 || match > 100) {
RETURN_FALSE;
} else {
RETURN_LONG(match);
}
}
/* }}} */
/* {{{ ssdeep_module_entry
*/
zend_module_entry ssdeep_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
STANDARD_MODULE_HEADER,
#endif
PHP_SSDEEP_EXTNAME,
ssdeep_functions,
NULL /* PHP_MINIT(ssdeep) */,
NULL /* PHP_MSHUTDOWN(ssdeep) */,
NULL /* PHP_RINIT(ssdeep) */, /* Replace with NULL if there's nothing to do at request start */
NULL /* PHP_RSHUTDOWN(ssdeep)*/, /* Replace with NULL if there's nothing to do at request end */
PHP_MINFO(ssdeep),
#if ZEND_MODULE_API_NO >= 20010901
PHP_SSDEEP_VERSION,
#endif
STANDARD_MODULE_PROPERTIES
};
/* }}} */
#ifdef COMPILE_DL_SSDEEP
ZEND_GET_MODULE(ssdeep)
#endif