关于网上流传的PHP写MD5加密函数

风清扬斈 10年前 (2010-01-24) 信息科技 3688 0

观察一下就可以发现,这个代码是改写asp里的,只是仿写,所以调试时出错,不知道为什么会在网上广泛流传,网络这东西,垃圾成堆,让人不敢信任了。

<?php
define("BITS_TO_A_BYTE",8);
define("BYTES_TO_A_WORD",4);
define("BITS_TO_A_WORD",32);
$m_lOnBits=array(30);  //ASP函数中的定义变量数组,这里没有用到
$m_l2Power=array(30);

function LShift($lValue,$iShiftBits)
{
        if ($iShiftBits==0) return $lValue;
        if ($iShiftBits==31)
        {
                if ($lValue&1) { return 0x80000000; }
                else { return 0; }
        }
        if ($iShiftBits < 0 || $iShiftBits > 31) { }
        if (($lValue&$GLOBALS[31-$iShiftBits]))
        {        $tmpstr=(($lValue&$GLOBALS[31-($iShiftBits+1)])*$GLOBALS[$iShiftBits])|0x80000000; }
        else
        { $tmpstr=(($lValue&$GLOBALS[31-$iShiftBits])*$GLOBALS[$iShiftBits]); }
        return $tmpstr;
}

function RShift($lValue,$iShiftBits)
{
        if ($iShiftBits==0)return $lValue;
        if ($iShiftBits==31)
        {
                if ($lValue&0x80000000) { return 1; }
                else { return 0; }
        }
        if ($iShiftBits<0 || $iShiftBits>31) { }
        $tmpstr=floor(($lValue&0x7FFFFFFE)/$GLOBALS[$iShiftBits]);
        if ($lValue&0x80000000) { $tmpstr=$tmpstr|floor(0x40000000/$GLOBALS[$iShiftBits-1]); }
        return $tmpstr;
}

function RotateLeft($lValue,$iShiftBits)
{
        return LShift($lValue,$iShiftBits)|RShift($lValue,(32-$iShiftBits));
}

function AddUnsigned($lX,$lY)
{
        $lX8=$lX&0x80000000;
        $lY8=$lY&0x80000000;
        $lX4=$lX&0x40000000;
        $lY4=$lY&0x40000000;
        $lResult=($lX&0x3FFFFFFF)+($lY&0x3FFFFFFF);

        if ($lX4&$lY4) { $lResult=$lResult^0x80000000^$lX8^$lY8; }
        if ($lX4|$lY4)
        {
                if ($lResult&0x40000000)
                { $lResult=$lResult^0xC0000000^$lX8^$lY8; }
                else
                { $lResult=$lResult^0x40000000^$lX8^$lY8; }
        }
        else
        { $lResult=$lResult^$lX8^$lY8; }
        return $lResult;
}

function md5_F($x,$y,$z)
{
        return ($x&$y)|((~$x)&$z);
}

function md5_G($x,$y,$z)
{
        return ($x&$z)|($y&(~$z));
}

function md5_H($x,$y,$z)
{
        return ($x^$y^$z);
}

function md5_I($x,$y,$z)
{
        return ($y^($x|(~$z)));
}

function md5_FF(&$a,$b,$c,$d,$x,$s,$ac)
{
        $a=AddUnsigned($a,AddUnsigned(AddUnsigned(md5_F($b,$c,$d),$x),$ac));
        $a=RotateLeft($a,$s);
        $a=AddUnsigned($a,$b);
}

function md5_GG(&$a,$b,$c,$d,$x,$s,$ac)
{
        $a=AddUnsigned($a,AddUnsigned(AddUnsigned(md5_G($b,$c,$d),$x),$ac));
        $a=RotateLeft($a,$s);
        $a=AddUnsigned($a,$b);
}

function md5_HH(&$a,$b,$c,$d,$x,$s,$ac)
{
        $a=AddUnsigned($a,AddUnsigned(AddUnsigned(md5_H($b,$c,$d),$x),$ac));
        $a=RotateLeft($a,$s);
        $a=AddUnsigned($a,$b);
}

function md5_II(&$a,$b,$c,$d,$x,$s,$ac)
{
        $a=AddUnsigned($a,AddUnsigned(AddUnsigned(md5_I($b,$c,$d),$x),$ac));
        $a=RotateLeft($a,$s);
        $a=AddUnsigned($a,$b);
}

function ConvertToWordArray($sMessage)
{
        $lWordArray=array();
        $MODULUS_BITS=512;
        $CONGRUENT_BITS=448;
        $lMessageLength=strlen($sMessage);
        $lNumberOfWords=(floor(($lMessageLength+floor(($MODULUS_BITS-$CONGRUENT_BITS)/BITS_TO_A_BYTE))/floor($MODULUS_BITS/BITS_TO_A_BYTE))+1)*floor($MODULUS_BITS/BITS_TO_A_WORD);
        $lBytePosition=0;
        $lByteCount=0;
        while(!($lByteCount>=$lMessageLength))
        {
                $lWordCount=floor($lByteCount/BYTES_TO_A_WORD);
                $lBytePosition=($lByteCount%BYTES_TO_A_WORD)*BITS_TO_A_BYTE;
                $lWordArray[$lWordCount]=$lWordArray[$lWordCount]|LShift(ord(substr($sMessage,$lByteCount+1-1,1)),$lBytePosition);
                $lByteCount=$lByteCount+1;
        }
        $lWordCount=floor($lByteCount/BYTES_TO_A_WORD);
        $lBytePosition=($lByteCount%BYTES_TO_A_WORD)*BITS_TO_A_BYTE;
        $lWordArray[$lWordCount]=$lWordArray[$lWordCount]|LShift(0x80,$lBytePosition);
        $lWordArray[$lNumberOfWords-2]=LShift($lMessageLength,3);
        $lWordArray[$lNumberOfWords-1]=RShift($lMessageLength,29);
        return $lWordArray;
}

function WordToHex($lValue)
{
        $tmpstr="";
        for ($lCount=0; $lCount<=3; $lCount++)
        {
                $lByte=RShift($lValue,$lCount*BITS_TO_A_BYTE)&$GLOBALS[BITS_TO_A_BYTE-1];
                 //$tmpstr=$tmpstr.(substr("0".dechex($lByte),strlen("0".dechex($lByte))-2));   //这行可能有问题
                   $tmpstr=$tmpstr.(substr("0".dechex($lByte),-2,2));
        }
        return $tmpstr;
}
/*作者上面注释会在上面几行出错,但是仔细对照asp的MD5函数,发现并没错,翻译过去是正确的,下面是asp函数原型

Private Function WordToHex(lValue)
    Dim lByte
    Dim lCount
 
    For lCount = 0 To 3
        lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) And m_lOnBits(BITS_TO_A_BYTE - 1)
        WordToHex = WordToHex & Right("0" & Hex(lByte), 2)   (i)取右侧两位
    Next
End Function
*/


function php_MD5($sMessage)
{
        $GLOBALS[0]=intval(1);
        $GLOBALS[1]=intval(3);
        $GLOBALS[2]=intval(7);
        $GLOBALS[3]=intval(15);
        $GLOBALS[4]=intval(31);
        $GLOBALS[5]=intval(63);
        $GLOBALS[6]=intval(127);
        $GLOBALS[7]=intval(255);
        $GLOBALS[8]=intval(511);
        $GLOBALS[9]=intval(1023);
        $GLOBALS[10]=intval(2047);
        $GLOBALS[11]=intval(4095);
        $GLOBALS[12]=intval(8191);
        $GLOBALS[13]=intval(16383);
        $GLOBALS[14]=intval(32767);
        $GLOBALS[15]=intval(65535);
        $GLOBALS[16]=intval(131071);
        $GLOBALS[17]=intval(262143);
        $GLOBALS[18]=intval(524287);
        $GLOBALS[19]=intval(1048575);
        $GLOBALS[20]=intval(2097151);
        $GLOBALS[21]=intval(4194303);
        $GLOBALS[22]=intval(8388607);
        $GLOBALS[23]=intval(16777215);
        $GLOBALS[24]=intval(33554431);
        $GLOBALS[25]=intval(67108863);
        $GLOBALS[26]=intval(134217727);
        $GLOBALS[27]=intval(268435455);
        $GLOBALS[28]=intval(536870911);
        $GLOBALS[29]=intval(1073741823);
        $GLOBALS[30]=intval(2147483647);

        $GLOBALS[0]=intval(1);  //明显出错,重复定义,以下均错误
        $GLOBALS[1]=intval(2);
        $GLOBALS[2]=intval(4);
        $GLOBALS[3]=intval(8);
        $GLOBALS[4]=intval(16);
        $GLOBALS[5]=intval(32);
        $GLOBALS[6]=intval(64);
        $GLOBALS[7]=intval(128);
        $GLOBALS[8]=intval(256);
        $GLOBALS[9]=intval(512);
        $GLOBALS[10]=intval(1024);
        $GLOBALS[11]=intval(2048);
        $GLOBALS[12]=intval(4096);
        $GLOBALS[13]=intval(8192);
        $GLOBALS[14]=intval(16384);
        $GLOBALS[15]=intval(32768);
        $GLOBALS[16]=intval(65536);
        $GLOBALS[17]=intval(131072);
        $GLOBALS[18]=intval(262144);
        $GLOBALS[19]=intval(524288);
        $GLOBALS[20]=intval(1048576);
        $GLOBALS[21]=intval(2097152);
        $GLOBALS[22]=intval(4194304);
        $GLOBALS[23]=intval(8388608);
        $GLOBALS[24]=intval(16777216);
        $GLOBALS[25]=intval(33554432);
        $GLOBALS[26]=intval(67108864);
        $GLOBALS[27]=intval(134217728);
        $GLOBALS[28]=intval(268435456);
        $GLOBALS[29]=intval(536870912);
        $GLOBALS[30]=intval(1073741824);

        $S11=7;
        $S12=12;
        $S13=17;
        $S14=22;
        $S21=5;
        $S22=9;
        $S23=14;
        $S24=20;
        $S31=4;
        $S32=11;
        $S33=16;
        $S34=23;
        $S41=6;
        $S42=10;
        $S43=15;
        $S44=21;

        $x=ConvertToWordArray($sMessage);

        $a=0x67452301;
        $b=0xEFCDAB89;
        $c=0x98BADCFE;
        $d=0x10325476;

        for ($k=0; $k<=count($x); $k=$k+16)
        {
                $AA=$a;
                $BB=$b;
                $CC=$c;
                $DD=$d;
                md5_FF($a,$b,$c,$d,$x[$k+0],$S11,0xD76AA478);
        md5_FF($d,$a,$b,$c,$x[$k+1],$S12,0xE8C7B756);
        md5_FF($c,$d,$a,$b,$x[$k+2],$S13,0x242070DB);
        md5_FF($b,$c,$d,$a,$x[$k+3],$S14,0xC1BDCEEE);
        md5_FF($a,$b,$c,$d,$x[$k+4],$S11,0xF57C0FAF);
        md5_FF($d,$a,$b,$c,$x[$k+5],$S12,0x4787C62A);
        md5_FF($c,$d,$a,$b,$x[$k+6],$S13,0xA8304613);
        md5_FF($b,$c,$d,$a,$x[$k+7],$S14,0xFD469501);
        md5_FF($a,$b,$c,$d,$x[$k+8],$S11,0x698098D8);
        md5_FF($d,$a,$b,$c,$x[$k+9],$S12,0x8B44F7AF);
        md5_FF($c,$d,$a,$b,$x[$k+10],$S13,0xFFFF5BB1);
        md5_FF($b,$c,$d,$a,$x[$k+11],$S14,0x895CD7BE);
        md5_FF($a,$b,$c,$d,$x[$k+12],$S11,0x6B901122);
        md5_FF($d,$a,$b,$c,$x[$k+13],$S12,0xFD987193);
        md5_FF($c,$d,$a,$b,$x[$k+14],$S13,0xA679438E);
        md5_FF($b,$c,$d,$a,$x[$k+15],$S14,0x49B40821);

        md5_GG($a,$b,$c,$d,$x[$k+1],$S21,0xF61E2562);
        md5_GG($d,$a,$b,$c,$x[$k+6],$S22,0xC040B340);
        md5_GG($c,$d,$a,$b,$x[$k+11],$S23,0x265E5A51);
        md5_GG($b,$c,$d,$a,$x[$k+0],$S24,0xE9B6C7AA);
        md5_GG($a,$b,$c,$d,$x[$k+5],$S21,0xD62F105D);
        md5_GG($d,$a,$b,$c,$x[$k+10],$S22,0x2441453);
        md5_GG($c,$d,$a,$b,$x[$k+15],$S23,0xD8A1E681);
        md5_GG($b,$c,$d,$a,$x[$k+4],$S24,0xE7D3FBC8);
        md5_GG($a,$b,$c,$d,$x[$k+9],$S21,0x21E1CDE6);
        md5_GG($d,$a,$b,$c,$x[$k+14],$S22,0xC33707D6);
        md5_GG($c,$d,$a,$b,$x[$k+3],$S23,0xF4D50D87);
        md5_GG($b,$c,$d,$a,$x[$k+8],$S24,0x455A14ED);
        md5_GG($a,$b,$c,$d,$x[$k+13],$S21,0xA9E3E905);
        md5_GG($d,$a,$b,$c,$x[$k+2],$S22,0xFCEFA3F8);
        md5_GG($c,$d,$a,$b,$x[$k+7],$S23,0x676F02D9);
        md5_GG($b,$c,$d,$a,$x[$k+12],$S24,0x8D2A4C8A);

        md5_HH($a,$b,$c,$d,$x[$k+5],$S31,0xFFFA3942);
        md5_HH($d,$a,$b,$c,$x[$k+8],$S32,0x8771F681);
        md5_HH($c,$d,$a,$b,$x[$k+11],$S33,0x6D9D6122);
        md5_HH($b,$c,$d,$a,$x[$k+14],$S34,0xFDE5380C);
        md5_HH($a,$b,$c,$d,$x[$k+1],$S31,0xA4BEEA44);
        md5_HH($d,$a,$b,$c,$x[$k+4],$S32,0x4BDECFA9);
        md5_HH($c,$d,$a,$b,$x[$k+7],$S33,0xF6BB4B60);
        md5_HH($b,$c,$d,$a,$x[$k+10],$S34,0xBEBFBC70);
        md5_HH($a,$b,$c,$d,$x[$k+13],$S31,0x289B7EC6);
        md5_HH($d,$a,$b,$c,$x[$k+0],$S32,0xEAA127FA);
        md5_HH($c,$d,$a,$b,$x[$k+3],$S33,0xD4EF3085);
        md5_HH($b,$c,$d,$a,$x[$k+6],$S34,0x4881D05);
        md5_HH($a,$b,$c,$d,$x[$k+9],$S31,0xD9D4D039);
        md5_HH($d,$a,$b,$c,$x[$k+12],$S32,0xE6DB99E5);
        md5_HH($c,$d,$a,$b,$x[$k+15],$S33,0x1FA27CF8);
        md5_HH($b,$c,$d,$a,$x[$k+2],$S34,0xC4AC5665);

        md5_II($a,$b,$c,$d,$x[$k+0],$S41,0xF4292244);
        md5_II($d,$a,$b,$c,$x[$k+7],$S42,0x432AFF97);
        md5_II($c,$d,$a,$b,$x[$k+14],$S43,0xAB9423A7);
        md5_II($b,$c,$d,$a,$x[$k+5],$S44,0xFC93A039);
        md5_II($a,$b,$c,$d,$x[$k+12],$S41,0x655B59C3);
        md5_II($d,$a,$b,$c,$x[$k+3],$S42,0x8F0CCC92);
        md5_II($c,$d,$a,$b,$x[$k+10],$S43,0xFFEFF47D);
        md5_II($b,$c,$d,$a,$x[$k+1],$S44,0x85845DD1);
        md5_II($a,$b,$c,$d,$x[$k+8],$S41,0x6FA87E4F);
        md5_II($d,$a,$b,$c,$x[$k+15],$S42,0xFE2CE6E0);
        md5_II($c,$d,$a,$b,$x[$k+6],$S43,0xA3014314);
        md5_II($b,$c,$d,$a,$x[$k+13],$S44,0x4E0811A1);
        md5_II($a,$b,$c,$d,$x[$k+4],$S41,0xF7537E82);
        md5_II($d,$a,$b,$c,$x[$k+11],$S42,0xBD3AF235);
        md5_II($c,$d,$a,$b,$x[$k+2],$S43,0x2AD7D2BB);
        md5_II($b,$c,$d,$a,$x[$k+9],$S44,0xEB86D391);
                $a=AddUnsigned($a,$AA);
                $b=AddUnsigned($b,$BB);
                $c=AddUnsigned($c,$CC);
                $d=AddUnsigned($d,$DD);
        }
        return strtolower(WordToHex($a).WordToHex($b).WordToHex($c).WordToHex($d));
}


       $aaa="abcd";   //这个函数是错误的,和php自带的md5结果不一致
     echo PHP_MD5($aaa);   //输出自定义函数结果
     echo "<br>".md5($aaa); //使用内置的函数返回结果
?>

输出结果:

80808000008080008080008000808000
e2fc714c4727ee9395f324cd2e7f331f

因此,我对该函数做了修改如下:

"

相关推荐

  • 网友评论

    • (*)

    最新评论