对一套WAF防护规则（正则表达式）的整理和分析。

//此套WAF防护正则表达式规则来源于ShareWAF（http://www.sharewaf.com/）
//测试方法建议：请依下方测试使用的test语句进行，根据true、false，可知是否能识别出***并记录到数据库

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//新增
/\s*or\s+.*=.*/i,
/order\s+by\s+.*--$/i
];

if( regexp_debug == 1) {
///select|update|delete|truncate|join|union|exec|insert|drop|count|Sp_sqlexec|order by|’|"|>| //不区分大小写的字符串匹配，留给影卫字符匹配，这里不使用

//.匹配除“\n”之外的任何单个字符
//含意：匹配select from或select limit语句
//注意：区分大小写，如要取消大小写区分，加：/i

//新增，匹配' or 1=1 –，规则：/空格出现或不出现 or 空格出现1次或多次任何字符不限次数 = 任意字符不限次数
console.log( /\s*or\s+.*=.*/i.test("'or 1=1") ); //true
console.log( /\s*or\s+.*=.*/i.test("'or 1!=2") ); //true
console.log( /\s*or\s+.*=.*/i.test("'or 'a'='a'") ); //true
console.log( /\s*or\s+.*=.*/i.test("'or'a'='a'") ); //false
console.log( /\s*or\s+.*=.*/i.test("'or1=1") ); //false

//新增，匹配：order by 1 --
console.log( /order\s+by\s+.*--$/i.test("order by 1 --") ); //true
console.log( /order\s+by\s+.*--$/i.test("order by 2 --") ); //true
console.log( /order\s+by\s+.*--$/i.test("order BY 3 --") ); //true

console.log( /select.+(from|limit)/.test("select * from abc") ); //true
console.log( /select.+(from|limit)/.test("select top 10 * from abc") ); //true
console.log( /select.+(from|limit)/.test("select top 10") ); //false
console.log( /select.+(from|limit)/.test("Select top 10 from") ); //false

//(?:X)：仅分组
//.：任意字符号
//X*?：字符出现0次或多次
//(.*)：任意字符出现0次或多次
//含意：匹配union select语法
//注意：区分大小写，如要取消大小写区分，加：/i
console.log( /(?:(union(.*?)select))/.test("union select 1,2,3 from") ); //true
console.log( /(?:(union(.*?)select))/.test("UNION select 1,2,3 from") ); //false
console.log( /(?:(union(.*?)select))/.test("abc union abc select 1,2,3 from") ); //true
console.log( /(?:(union(.*?)select))/.test("abc union /* */ select 1,2,3 from") ); //true
console.log( /(?:(union(.*?)select))/.test("abc union /* */") ); //false
console.log( /(?:(union(.*?)select))/.test("select col from table union all select col2 from table2") ); //true
//对这条语法存疑，写的可能有问题，下面一行的测试说明：(?:)（仅分组，不记录分组序号，也不捕获该匹配）是无意义的
console.log( /union(.*?)select/.test("abc union /* */ select 1,2,3 from"),"test" ); //true

//\s ：空白字符
//\s* ：空白字符出现0次或多次（出现或不出现）
//\d：数字
//\d*：任意数字出现0次或多次
//含意：匹配sleep(数字)函数，括号里可以有任何空白字符
//注意：区分大小写，如要取消大小写区分，加：/i
console.log( /sleep$(\s*)(\d*)(\s*)$/.test("sleep(1)") ); //true
console.log( /sleep$(\s*)(\d*)(\s*)$/.test("sleep( 1 )") ); //true
console.log( /sleep$(\s*)(\d*)(\s*)$/.test("sleep('abc')") ); //false
console.log( /sleep$(\s*)(\d*)(\s*)$/.test("sleep(' abc')") ); //false
console.log( /sleep$(\s*)(\d*)(\s*)$/.test("SLEEP(1)") ); //false
//加i，不区分大小写
console.log( /sleep$(\s*)(\d*)(\s*)$/i.test("SLEEP(1)"),"test2" ); //true

//\s ：空白字符
//.：任意字符号
//含意：匹配group by语法
//注意：区分大小写，如要取消大小写区分，加：/i
//不确定：这条规则可能有误，不应该有（符号，group by语句没有（
console.log( /group\s+by.+\(/.test("group by id(") ); //true
console.log( /group\s+by.+\(/.test("group by id") ); //false

//information_schema：MySQL自带数据库
//\W:不能构成单词的字符，等价于[^A-Za-z0-9_]
//(?:X)仅分组
console.log( /(?:from\W+information_schema\W)/.test("select TABLES from * information_schema * ") ); //true
console.log( /(?:from\W+information_schema\W)/.test("select TABLES from/**/information_schema/**/") ); //true
console.log( /(?:from\W+information_schema\W)/.test("select TABLES from 123 /**/ union information_schema/**/") ); //false
//(?:X)仅分组无意义，应该可改为：
console.log( /from\W+information_schema\W/.test("select TABLES from/**/information_schema/**/") ); //true

//(?:X)：仅分组
//|：或
//\s：空白字符
//注意：区分大小写，如要取消大小写区分，加：/i
console.log( /(?:(?:current_)user|database|schema|connection_id)\s*\(/.test("current_user (") ); //true
console.log( /(?:(?:current_)user|database|schema|connection_id)\s*\(/.test("current_database(") ); //true
console.log( /(?:(?:current_)user|database|schema|connection_id)\s*\(/.test("current_connection_id (") ); //true
console.log( /(?:(?:current_)user|database|schema|connection_id)\s*\(/.test("current_connection_id = (") ); //false
console.log( /(?:(?:current_)user|database|schema|connection_id)\s*\(/.test("connection_id(") ); //true
console.log( /(?:(?:current_)user|database|schema|connection_id)\s*\(/.test("connection_ID(") ); //false
//应该可简化为：
console.log( /(?:current_)user|database|schema|connection_id\s*\(/.test("current_connection_id (") ); //true
console.log( /(?:current_)user|database|schema|connection_id\s*\(/.test("connection_id(") ); //true
}

exports.anti_cookieinj_rule =[
/select.+(from|limit)/,
/(?:(union(.*?)select))/,
///having|rongjitest/,
/sleep$(\s*)(\d*)(\s*)$/,
/benchmark$(.*)\,(.*)$/,
/base64_decode$/,
/(?:from\W+information_schema\W)/,
//修改，增加version
/(?:(?:current_)user|database|version|schema|connection_id)\s*\(/,
/(?:etc\/\W*passwd)/,
/into(\s+)+(?:dump|out)file\s*/,
/group\s+by.+\(/,
/xwork.MethodAccessor/,
/(?:define|eval|file_get_contents|include|require|require_once|shell_exec|phpinfo|system|passthru|preg_\w+|execute|echo|print|print_r|var_dump|(fp)open|alert|showmodaldialog)\(/
];
if( regexp_debug == 1) {
//\i大小写区分问题不再赘述，普遍存在
//mysql函数benchmark
//检测例：：benchmark(1000，encode("hello","goodbye"))
console.log( /benchmark\((.*)\,(.*)$/.test('select BENCHMARK(1000000,encode("hello","goodbye"))') ); //false
console.log( /benchmark$(.*)\,(.*)$/.test('select benchmark(1000000,encode("hello","goodbye"))'),"benchmark"); //true

///base64_decode\(/
//检测base64_decode()函数
//到此，大至可理解：此套规则是针对mysql、php的
console.log( /base64_decode\(/.test("base64_decode('abc')") ); //true
console.log( /base64_decode\(/.test("base64_Decode('abc')") ); //false

//etc路径加passwd检测
//\W：不能构成单词的字符
console.log( /(?:etc\/\W*passwd)/.test("etc/passwd") ); //true
console.log( /(?:etc\/\W*passwd)/.test("etc//passwd") ); //true
console.log( /(?:etc\/\W*passwd)/.test("etc passwd") ); //false
console.log( /(?:etc\/\W*passwd)/.test("etc////passwd") ); //true
console.log( /(?:etc\/\W*passwd)/.test("etc////PASSWD") ); //false

//mysql的file系列函数检测：dumpfile\outfile
//X+，X字符出现一次或多次
//\s：空白字符
console.log ( /into(\s+)+(?:dump|out)file\s*/.test("select * from test into outfile '/tmp/test.txt'") ); //true
console.log ( /into(\s+)+(?:dump|out)file\s*/.test("select * from test into dumpfile '/tmp/test.txt'") ); //true
console.log ( /into(\s+)+(?:dump|out)file\s*/.test("select * from test into dumpFILE '/tmp/test.txt'") ); //false

///xwork.MethodAccessor/,
//这是struts2相关的一个漏洞关键字
console.log( /xwork.MethodAccessor/.test("xwork.MethodAccessor") ); //true
console.log( /xwork.MethodAccessor/.test("xwork.MethodAccessoR") ); //false

//w+：可以构成单词的字符
//检测各种函数
/(?:define|eval|file_get_contents|include|require|require_once|shell_exec|phpinfo|system|passthru|preg_\w+|execute|echo|print|print_r|var_dump|(fp)open|alert|showmodaldialog)\(/
console.log( /(?:define|eval|file_get_contents|include|require|require_once|shell_exec|phpinfo|system|passthru|preg_\w+|execute|echo|print|print_r|var_dump|(fp)open|alert|showmodaldialog)\(/.test("define") ); //false
console.log( /(?:define|eval|file_get_contents|include|require|require_once|shell_exec|phpinfo|system|passthru|preg_\w+|execute|echo|print|print_r|var_dump|(fp)open|alert|showmodaldialog)\(/.test("define(") ); //true
console.log( /(?:define|eval|file_get_contents|include|require|require_once|shell_exec|phpinfo|system|passthru|preg_\w+|execute|echo|print|print_r|var_dump|(fp)open|alert|showmodaldialog)\(/.test("define(") ); //true
console.log( /(?:define|eval|file_get_contents|include|require|require_once|shell_exec|phpinfo|system|passthru|preg_\w+|execute|echo|print|print_r|var_dump|(fp)open|alert|showmodaldialog)\(/.test("preg_a(") ); //true
}

exports.anti_xss_rule = [
//注释掉
// /<|>|:|'|""|`|--|()|[]|{}|/,
/\<(iframe|script|body|img|layer|div|meta|style|base|object|input)/,
/(onmouseover|onmousemove|onerror|onload)\=/i,
//新增
/javascript:/i
];

if( regexp_debug == 1){

console.log( /(onmouseover|onmousemove|onerror|onload)\=/i.test("onerror='alert(1)'")); //true

console.log( /javascript:/i.test("javascript:alert(1);") );

}

exports.anti_folder_iterator_rule = [

/..\/..\//,

// /(?:etc\/\W*passwd\/shadow)/

//修改：

// /(?:etc\/\W*passwd)/i

];

if( regexp_debug == 1){

//匹配：../../

console.log( /..\/..\//.test("../../pass/") ); //true

console.log( /..\/..\//.test("../pass/") ); //false

}

exports.anti_cmdinj_rule = [

//修改

// || 命令

/\|\|.*(?:ls|pwd|whoami|ll|ifconfog|ipconfig|&&|chmod|cd|mkdir|rmdir|cp|mv)/,

//命令||

/(?:ls|pwd|whoami|ll|ifconfog|ipconfig|&&|chmod|cd|mkdir|rmdir|cp|mv).*\|\|/

];

if(regexp_debug == 1){

console.log( /\|\|.*(?:ls|pwd|whoami|ll|ifconfog|ipconfig|&&|chmod|cd|mkdir|rmdir|cp|mv)/.test("||ipconfig") ); //true

console.log( /\|\|.*(?:ls|pwd|whoami|ll|ifconfog|ipconfig|&&|chmod|cd|mkdir|rmdir|cp|mv)/.test("||cd") ); //true

console.log( /\|\|.*(?:ls|pwd|whoami|ll|ifconfog|ipconfig|&&|chmod|cd|mkdir|rmdir|cp|mv)/.test("cd") ); //false

console.log( /\|\|.*(?:ls|pwd|whoami|ll|ifconfog|ipconfig|&&|chmod|cd|mkdir|rmdir|cp|mv)/.test("|cd") ); //false

}

exports.anti_remote_file_include_rule = [

/http:\/\/|https:\/\//,

//注释

];

if(regexp_debug == 1){

console.log( /http:\/\/|https:\/\/|..\/..\//.test("http://") ); //true

console.log( /http:\/\/|https:\/\/|..\/..\//.test("http:") ); //false

console.log( /http:\/\/|https:\/\/|..\/..\//.test("https:") ); //false

}

exports.anti_local_file_include_rule = [

//这行容易误报

// /..\//,

/(?:etc\/\W*passwd)/,

//注释

];

if( regexp_debug == 1){

//匹配：etc/ 不能构成单词的任意字符不出现或出现或出现多次 password

console.log( /(?:etc\/\W*passwd)/i.test("etc//passwd") ); //true

console.log( /(?:etc\/\W*passwd)/i.test("etc/passwd") ); //true

console.log( /(?:etc\/\W*passwd)/i.test("etc//**/passwd") ); //true

console.log( /(?:etc\/\W*passwd)/i.test("etc\\passwd") ); //false

}

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对一套WAF防护规则（正则表达式）的整理和分析。

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