/*
  *  Unit tests for JS normalizer.
  *
  *  Copyright (C) 2008 Sourcefire, Inc.
  *
  *  Authors: Török Edvin
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2 as
  *  published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  *  MA 02110-1301, USA.
  */

 #if HAVE_CONFIG_H
 #include "clamav-config.h"
 #endif
 
 #include <stdio.h>
 #ifdef HAVE_CHECK
 
 #include <stdlib.h>
 #include <limits.h>
 #include <string.h>
 #include <check.h>

 #include <fcntl.h>

 #include "../libclamav/clamav.h"
 #include "../libclamav/others.h"

 #include "../libclamav/dconf.h"
 #include "../libclamav/htmlnorm.h"

 #include "../libclamav/jsparse/js-norm.h"
 #include "../libclamav/jsparse/lexglobal.h"
 #include "../libclamav/jsparse/textbuf.h"
 #include "../libclamav/jsparse/generated/keywords.h"
 #include "../libclamav/jsparse/generated/operators.h"

 #include "checks.h"

 
 struct test {
 	const char *str;
 	int is;
 };
 
 static struct test kw_test[] = {
 	{"new",1},
 	{"eval",0},
 	{"function",1},
 	{"eval1",0},
 	{"ne",0}
 };
 
 static struct test op_test[] = {
 	{"-",1},
 	{"---",0}
 };
 

 #ifdef CHECK_HAVE_LOOPS

 START_TEST (test_keywords)
 {
     const struct keyword *kw = in_word_set(kw_test[_i].str, strlen(kw_test[_i].str));
     if(kw_test[_i].is) {
 	    fail_unless(kw && !strcmp(kw->name, kw_test[_i].str), "keyword mismatch");
     } else {
 	    fail_unless(!kw, "non-keyword detected as keyword");
     }
 }
 END_TEST
 
 START_TEST (test_operators)
 {
     const struct operator *op = in_op_set(op_test[_i].str, strlen(op_test[_i].str));
     if(op_test[_i].is)
 	    fail_unless(op && !strcmp(op->name, op_test[_i].str), "operator mismatch");
     else
 	    fail_unless(!op, "non-operator detected as operator");
 }
 END_TEST

 #endif /* CHECK_HAVE_LOOPS */

 
 START_TEST (test_token_string)
 {
 	char str[] = "test";
 	yystype tok;
 	memset(&tok, 0, sizeof(tok));
 
 	TOKEN_SET(&tok, string, str);
 	fail_unless(TOKEN_GET(&tok, string) == str, "token string get/set");
 	fail_unless(TOKEN_GET(&tok, cstring) == str, "token string->cstring");
 	fail_unless(TOKEN_GET(&tok, scope) == NULL, "token string->scope");
 	fail_unless(TOKEN_GET(&tok, ival) == -1, "token string->ival");
 }
 END_TEST
 
 START_TEST (test_token_cstring)
 {
 	const char *str = "test";
 	yystype tok;
 	memset(&tok, 0, sizeof(tok));
 
 	TOKEN_SET(&tok, cstring, str);
 	fail_unless(TOKEN_GET(&tok, string) == NULL, "token cstring->string");
 	fail_unless(TOKEN_GET(&tok, cstring) == str, "token string->cstring");
 	fail_unless(TOKEN_GET(&tok, scope) == NULL, "token string->scope");
 	fail_unless(TOKEN_GET(&tok, ival) == -1, "token string->ival");
 }
 END_TEST
 
 START_TEST (test_token_scope)
 {
 	struct scope *sc = (struct scope*)0xdeadbeef;
 	yystype tok;
 	memset(&tok, 0, sizeof(tok));
 
 	TOKEN_SET(&tok, scope, sc);
 	fail_unless(TOKEN_GET(&tok, string) == NULL, "token scope->string");
 	fail_unless(TOKEN_GET(&tok, cstring) == NULL, "token scope->cstring");
 	fail_unless(TOKEN_GET(&tok, scope) == sc, "token scope->scope");
 	fail_unless(TOKEN_GET(&tok, ival) == -1, "token scope->ival");
 }
 END_TEST
 
 START_TEST (test_token_ival)
 {
 	int val = 0x1234567;
 	yystype tok;
 	memset(&tok, 0, sizeof(tok));
 
 	TOKEN_SET(&tok, ival, val);
 	fail_unless(TOKEN_GET(&tok, string) == NULL, "token ival->string");
 	fail_unless(TOKEN_GET(&tok, cstring) == NULL, "token ival->cstring");
 	fail_unless(TOKEN_GET(&tok, scope) == NULL, "token ival->scope");

 	fail_unless(TOKEN_GET(&tok, dval) - -1 < 1e-9, "token ival->dval");

 	fail_unless(TOKEN_GET(&tok, ival) == val, "token ival->ival");
 }
 END_TEST
 
 START_TEST (test_token_dval)
 {
 	int val = 0.12345;
 	yystype tok;
 	memset(&tok, 0, sizeof(tok));
 
 	TOKEN_SET(&tok, dval, val);
 	fail_unless(TOKEN_GET(&tok, string) == NULL, "token dval->string");
 	fail_unless(TOKEN_GET(&tok, cstring) == NULL, "token dval->cstring");
 	fail_unless(TOKEN_GET(&tok, scope) == NULL, "token dval->scope");

 	fail_unless(TOKEN_GET(&tok, dval) - val < 1e-9, "token dval->dval");

 	fail_unless(TOKEN_GET(&tok, ival) == -1, "token dval->ival");
 }
 END_TEST
 
 START_TEST (test_init_destroy)
 {
 	struct parser_state *state = cli_js_init();
 	fail_unless(!!state, "cli_js_init()");
 	cli_js_destroy(state);

 	cli_js_destroy(NULL);

 }
 END_TEST
 
 START_TEST (test_init_parse_destroy)
 {
 	const char buf[] = "function (p) { return \"anonymous\";}";
 	struct parser_state *state = cli_js_init();
 	fail_unless(!!state, "cli_js_init()");
 	cli_js_process_buffer(state, buf, strlen(buf));
 	cli_js_process_buffer(state, buf, strlen(buf));
 	cli_js_parse_done(state);
 	cli_js_destroy(state);
 }
 END_TEST
 

 START_TEST (js_begin_end)
 {
 	char buf[16384] = "</script>";
 	size_t p;
 	struct cli_dconf *dconf = cli_dconf_init();
 
 	fail_unless(!!dconf, "failed to init dconf");
 	for(p=strlen(buf); p < 8191; p++) {
 		buf[p++] = 'a';
 		buf[p] = ' ';
 	}
 	strncpy(buf + 8192, " stuff stuff <script language='javascript'> function () {}", 8192);

 	fail_unless(html_normalise_mem((unsigned char*)buf, sizeof(buf), NULL, NULL, dconf) == 1, "normalise");

 	free(dconf);

 }
 END_TEST
 
 START_TEST (multiple_scripts)
 {

 	char buf[] = "</script> stuff"\

 			    "<script language='Javascript'> function foo() {} </script>"\
 			    "<script language='Javascript'> function bar() {} </script>";
 	struct cli_dconf *dconf = cli_dconf_init();
 
 	fail_unless(!!dconf, "failed to init dconf");

 	fail_unless(html_normalise_mem((unsigned char*)buf, sizeof(buf), NULL, NULL, dconf) == 1, "normalise");

 	/* TODO: test that both had been normalized */

 	free(dconf);
 }
 END_TEST
 
 static struct parser_state *state;
 static char *tmpdir = NULL;
 
 static void jstest_setup(void)
 {
 	state = cli_js_init();
 	fail_unless(!!state, "js init");
 	tmpdir = cli_gentemp(NULL);
 	fail_unless(!!tmpdir,"js tmp dir");
 	fail_unless(mkdir(tmpdir, 0700) == 0, "tempdir mkdir");
 }
 
 static void jstest_teardown(void)
 {
 	if(tmpdir) {
 		cli_rmdirs(tmpdir);
 		free(tmpdir);
 	}
 	cli_js_destroy(state);
 	state = NULL;
 }
 
 static void tokenizer_test(const char *in, const char *expected, int split)
 {
 	char filename[1024];
 	char *buf;
 	int fd;

 	ssize_t len = strlen(expected);

 	size_t inlen = strlen(in);
 	ssize_t p, p2;
 
 	if(split) {
 		cli_js_process_buffer(state, in, inlen/2);
 		cli_js_process_buffer(state, in + inlen/2, inlen - inlen/2);
 	} else {
 		cli_js_process_buffer(state, in, inlen);
 	}
 
 	cli_js_parse_done(state);
 	cli_js_output(state, tmpdir);
 	snprintf(filename, 1023, "%s/javascript", tmpdir);
 
 	buf = cli_malloc(len + 1);
 	if(!buf) {
 		jstest_teardown();
 		fail("malloc buffer");
 	}
 
 	fd = open(filename, O_RDONLY);
 	if(fd < 0) {
 		jstest_teardown();
 		fail("failed to open output file: %s", filename);
 	}
 
 	p = read(fd, buf, len);
 	if(p != len) {
 		close(fd);
 		jstest_teardown();
 		fail("file is smaller: %lu, expected: %lu", p, len);
 	}
 	p = lseek(fd, 0, SEEK_CUR);
 	fail_unless(p == len, "lseek position incorrect: %ld != %ld", p, len);
 	p = 0;
 	while(len > 0) {
 		char c1 = expected[p];
 		char c2 = buf[p];
 		if(c1 != c2) {
 			close(fd);

 			jstest_teardown();

 			fail("file contents mismatch at byte: %lu, was: %c, expected: %c", p, c2, c1);
 		}
 		p++;
 		len--;
 	}
 	free(buf);
 	p2 = lseek(fd, 0, SEEK_END);
 	if(p != p2) {
 		close(fd);
 		jstest_teardown();
 		fail("trailing garbage, file size: %ld, expected: %ld", p2, p);
 	}
 	close(fd);
 }
 
 static const char jstest_buf0[] =
 "function foo(a, b) {\n"\
 "var x = 1.9e2*2*a/ 4.;\n"\
 "var y = 'test\\'tst';//var foo=5\n"\
 "x=b[5],/* multiline\nvar z=6;\nsome*some/other**/"\
 "z=x/y;/* multiline oneline */var t=z/a;\n"\
 "z=[test;testi];"\
 "document.writeln('something');}";
 
 static const char jstest_expected0[] =
 "function n000(n001,n002){"\
 "var n003=190*2*n001/4;"\
 "var n004=\"test\'tst\";"\
 "n003=n002[5],"\
 "z=n003/n004;var n005=z/n001;"\
 "z=[test;testi];"\
 "document.writeln(\"something\");}";
 
 static const char jstest_buf1[] =
 "function () { var id\\u1234tx;}";
 
 static const char jstest_expected1[] =
 "function(){var n000;}";
 
 static const char jstest_buf2[] =
 "function () { var tst=\"a\"+'bc'+     'd'; }";
 
 static const char jstest_expected2[] =
 "function(){var n000=\"abcd\";}";
 
 static const char jstest_buf3[] =
 "dF('bmfsu%2639%2638x11u%2638%263%3A%264C1');";
 
 static const char jstest_expected3[] =
 "alert(\"w00t\");";
 

 #define B64 "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"

 
 /* TODO: document.write should be normalized too */
 static const char jstest_buf4[] =
 "document.write(unescape('%3C%73%63%72%69%70%74%20%6C%61%6E%67%75%61%67%65%3D%22%6A%61%76%61%73%63%72%69%70%74%22%3E%66%75%6E%63%74%69%6F%6E%20%64%46%28%73%29%7B%76%61%72%20%73%31%3D%75%6E%65%73%63%61%70%65%28%73%2E%73%75%62%73%74%72%28%30%2C%73%2E%6C%65%6E%67%74%68%2D%31%29%29%3B%20%76%61%72%20%74%3D%27%27%3B%66%6F%72%28%69%3D%30%3B%69%3C%73%31%2E%6C%65%6E%67%74%68%3B%69%2B%2B%29%74%2B%3D%53%74%72%69%6E%67%2E%66%72%6F%6D%43%68%61%72%43%6F%64%65%28%73%31%2E%63%68%61%72%43%6F%64%65%41%74%28%69%29%2D%73%2E%73%75%62%73%74%72%28%73%2E%6C%65%6E%67%74%68%2D%31%2C%31%29%29%3B%64%6F%63%75%6D%65%6E%74%2E%77%72%69%74%65%28%75%6E%65%73%63%61%70%65%28%74%29%29%3B%7D%3C%2F%73%63%72%69%70%74%3E'));eval(dF('gI%285%3B%285%3Afqjwy%28585%3A7%28586D%28585%3A7%3C%7C55y%28585%3A7%3C%28585%3A7%28586E%28585%3A8G5%285%3A%285%3C%286E3'));";
 
 static const char jstest_expected4[] =

 "document.write(\"<script language=\"javascript\">function df(s){var s1=unescape(s.substr(0,s.length-1)); var t='';for(i=0;i<s1.length;i++)t+=string.fromcharcode(s1.charcodeat(i)-s.substr(s.length-1,1));document.write(unescape(t));}</script>\");eval();alert(\"w00t\");";

 
 static const char jstest_buf5[] =
 "function (p,a,c,k,e,r){}('0(\\'1\\');',2,2,'alert|w00t'.split('|'),0,{});";
 
 static const char jstest_expected5[] =
 "function(n000,n001,n002,n003,n004,n005){}(alert(\"w00t\"););";
 
 static const char jstest_buf6[] =
 "function $(p,a,c,k,e,d){} something(); $('0(\\'1\\');',2,2,'alert|w00t'.split('|'),0,{});";
 
 static const char jstest_expected6[] =
 "function n000(n001,n002,n003,n004,n005,n006){}something();$(alert(\"w00t\"););";
 
 static const char jstest_buf7[] =

 "var z=\"tst" B64 "tst\";";

 
 static const char jstest_expected7[] =

 "var n000=\"tst" B64 "tst\";";

 
 static const char jstest_buf8[] =

 "var z=\'tst" B64 "tst\';";

 
 static const char jstest_expected8[] =

 "var n000=\"tst" B64 "tst\";";

 
 static const char jstest_buf9[] =
 "eval(unescape('%61%6c%65%72%74%28%27%74%65%73%74%27%29%3b'));";
 
 static const char jstest_expected9[] =
 "alert(\"test\");";
 
 static const char jstest_buf10[] =
 "function $ $() dF(x); function (p,a,c,k,e,r){function $(){}";
 
 static const char jstest_expected10[] =
 "function n000 n000()n001(x);function(n002,n003,n004,n005,n006,n007){function n008(){}";
 
 static const char jstest_buf11[] =
 "var x=123456789 ;";
 
 static const char jstest_expected11[] =

 "var n000=123456789;";

 static const char jstest_buf12[] =
 "var x='test\\u0000test';";
 
 static const char jstest_expected12[] =
 "var n000=\"test\x1test\";";
 

 static const char jstest_buf13[] =
 "var x\\s12345";
 
 static const char jstest_expected13[] =
 "var n000";
 
 

 static struct {
 	const char *in;
 	const char *expected;
 } js_tests[] = {
 	{jstest_buf0, jstest_expected0},
 	{jstest_buf1, jstest_expected1},
 	{jstest_buf2, jstest_expected2},
 	{jstest_buf3, jstest_expected3},
 	{jstest_buf4, jstest_expected4},
 	{jstest_buf5, jstest_expected5},
 	{jstest_buf6, jstest_expected6},
 	{jstest_buf7, jstest_expected7},

 	{jstest_buf8, jstest_expected8},
 	{jstest_buf9, jstest_expected9},
 	{jstest_buf10, jstest_expected10},

 	{jstest_buf11, jstest_expected11},

 	{jstest_buf12, jstest_expected12},
 	{jstest_buf13, jstest_expected13}

 };
 

 #ifdef CHECK_HAVE_LOOPS

 START_TEST (tokenizer_basic)
 {
 	tokenizer_test(js_tests[_i].in, js_tests[_i].expected, 0);
 }
 END_TEST
 
 START_TEST (tokenizer_split)
 {
 	tokenizer_test(js_tests[_i].in, js_tests[_i].expected, 1);

 }
 END_TEST

 #endif /* CHECK_HAVE_LOOPS */

 START_TEST (js_buffer)
 {
 	const size_t len = 512*1024;
 	const char s[] = "x=\"";
 	const char e[] = "\"";
 	char *tst = malloc(len);
 
 	fail_unless(!!tst, "malloc");
 
 	memset(tst, 'a', len);
 	strncpy(tst, s, strlen(s));
 	strncpy(tst + len - sizeof(e), e, sizeof(e));
 
 	tokenizer_test(tst,tst,1);
 	free(tst);
 }
 END_TEST
 

 START_TEST (screnc_infloop)
 {
 	char buf[24700] = "<%@ language='jscript.encode'>";
 	struct cli_dconf *dconf = cli_dconf_init();
 	size_t p;
 
 	fail_unless(!!dconf, "failed to init dconf");
 	for(p = strlen(buf); p < 16384; p++) {
 		buf[p] = ' ';
 	}
 	for(; p < 24625; p++) {
 		buf[p] = 'a';
 	}
 	strncpy(buf+24626,"#@~^ ", 10);
 	fail_unless(html_normalise_mem((unsigned char*)buf, sizeof(buf), NULL, NULL, dconf) == 1, "normalise");
 	free(dconf);
 }
 END_TEST
 

 Suite *test_jsnorm_suite(void)
 {
     Suite *s = suite_create("jsnorm");

     TCase *tc_jsnorm_gperf, *tc_jsnorm_token, *tc_jsnorm_api,
 	  *tc_jsnorm_tokenizer, *tc_jsnorm_bugs, *tc_screnc_infloop;
 

     tc_jsnorm_gperf = tcase_create("jsnorm gperf");
     suite_add_tcase (s, tc_jsnorm_gperf);

 #ifdef CHECK_HAVE_LOOPS

     tcase_add_loop_test(tc_jsnorm_gperf, test_keywords, 0, sizeof(kw_test)/sizeof(kw_test[0]));
     tcase_add_loop_test(tc_jsnorm_gperf, test_operators, 0, sizeof(op_test)/sizeof(op_test[0]));

 #endif

     tc_jsnorm_token = tcase_create("jsnorm token functions");

     suite_add_tcase (s, tc_jsnorm_token);

     tcase_add_test(tc_jsnorm_token, test_token_string);
     tcase_add_test(tc_jsnorm_token, test_token_cstring);
     tcase_add_test(tc_jsnorm_token, test_token_scope);
     tcase_add_test(tc_jsnorm_token, test_token_ival);
     tcase_add_test(tc_jsnorm_token, test_token_dval);
 
     tc_jsnorm_api = tcase_create("jsnorm api functions");

     suite_add_tcase (s, tc_jsnorm_api);

     tcase_add_test(tc_jsnorm_api, test_init_destroy);
     tcase_add_test(tc_jsnorm_api, test_init_parse_destroy);
 

     tc_jsnorm_tokenizer = tcase_create("jsnorm tokenizer");
     suite_add_tcase (s, tc_jsnorm_tokenizer);

     tcase_add_checked_fixture (tc_jsnorm_tokenizer, jstest_setup, jstest_teardown);

 #ifdef CHECK_HAVE_LOOPS

     tcase_add_loop_test(tc_jsnorm_tokenizer, tokenizer_basic, 0, sizeof(js_tests)/sizeof(js_tests[0]));
     tcase_add_loop_test(tc_jsnorm_tokenizer, tokenizer_split, 0, sizeof(js_tests)/sizeof(js_tests[0]));

 #endif

     tcase_add_test(tc_jsnorm_tokenizer, js_buffer);

 
     tc_jsnorm_bugs = tcase_create("jsnorm bugs");
     suite_add_tcase (s, tc_jsnorm_bugs);
     tcase_add_test(tc_jsnorm_bugs, js_begin_end);
     tcase_add_test(tc_jsnorm_bugs, multiple_scripts);
 

     tc_screnc_infloop = tcase_create("screnc infloop bug");
     suite_add_tcase (s, tc_screnc_infloop);
     tcase_add_test(tc_screnc_infloop, screnc_infloop);
 

     return s;
 }
 
 #endif