쿠키를 암호화할려고 소스를 찾던중에 pscode.com에 가니까 쓸만한 소스가 있어서 퍼왔습니다.
원문출처
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Title: Encrypt/Decrypt Text
Description: This fabulous class encrypts and decrypts any chain of characters, it uses an encryption method without having an exact order neither a fixed size of chain.
This class was developed originally by Kelvin C. Pérez for the language VB and implemented in PHP by Heriberto Mantilla Santamaría.
View online example --> http://hackprotm.webcindario.com/EncryptDemo/Demo.html
This file came from Planet-Source-Code.com...the home millions of lines of source code
You can view comments on this code/and or vote on it at: http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=1760&lngWId=8
The author may have retained certain copyrights to this code...please observe their request and the law by reviewing all copyright conditions at the above URL.
사용예
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위에 링크에서 소스 받아서 다운로드 받고 압축을 풀면 includes/EnDecryptText.php
파일이 핵심입니다.
동서 南北 Abc.
exxBo3077S3247U3196x2941Xg544a3553p4165fXa1N6s17s3757c3281OI544U1105u1666N1683AA782Hgbh
동서 南北 Abc.
★ 특징 ↓
암호화된 글자가 숫자하고 알파벳으로만 구성됨.
암호화된 글자가 그때 그때마다 다름 (새로고침 클릭해 보면 됩니다)
★ 주의사항 ↓
EnDecryptText.php 의 내용중에 Modules:: 글자를 $this-> 로 바꿔야 합니다.
Modules:: 은 첨보는거라서 뭐가 뭔지 모르겠지만, 클래스에서 새끼(?) 함수를
호출하려면 $this->로 해야할것 같아서 그렇게 했는데, 잘되더군요.
★ EnDecryptText.php 수정된 소스 ↓
<?
//*********************************************************//
//* Reservados todos los derechos HACKPRO TM ?2005 *//
//*-------------------------------------------------------*//
//* NOTA IMPORTANTE *//
//*-------------------------------------------------------*//
//* Si?tase libre para usar esta clase en sus p?inas, *//
//* con tal de que TODOS los cr?itos permanecen intactos.*//
//* S?o ladrones deshonrosos transmite el c?igo que los *//
//* programadores REALES escriben con dif?ultad y libre- *//
//* mente lo comparten quitando los comentarios y diciendo*//
//* que ellos escribieron el c?igo. *//
//*.......................................................*//
//* Encrypts and Decrypts a chain. *//
//*-------------------------------------------------------*//
//* Original in VB for: Kelvin C. Perez. *//
//* E-Mail: kelvin_perez@msn.com *//
//* WebSite: http://home.coqui.net/punisher *//
//* 수정 By 칼솜 : Modules:: 를 몽땅 $this-> 로 바꿈 *//
//*+++++++++++++++++++++++++++++++++++++++++++++++++++++++*//
//* Programmed in PHP for: Heriberto Mantilla Santamar?. *//
//* E-Mail: heri_05-hms@mixmail.com *//
//* WebSite: www.geocities.com/hackprotm/ *//
//*.......................................................*//
//* IMPORTANT NOTE *//
//*-------------------------------------------------------*//
//* Feel free to use this class in your pages, provided *//
//* ALL credits remain intact. Only dishonorable thieves *//
//* download code that REAL programmers work hard to write*//
//* and freely share with their programming peers, then *//
//* remove the comments and claim that they wrote the *//
//* code. *//
//*-------------------------------------------------------*//
//* All Rights Reserved HACKPRO TM ?2005 *//
//*********************************************************//
class EnDecryptText // Create a class of EnDecryptText.
{
//------------------------------------------------------------------------------------
// Encrypt a chain of text.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $cText: Chain to encrypt.
//------------------------------------------------------------------------------------
function Encrypt_Text($cText)
{$eText = $cText;
// Get a random Number between 1 and 100. This will be the multiplier
// for the Ascii value of the characters.
$nEncKey = intval((100 * $this->Rnd()) + 1);
// Loop until we get a random value betwee 5 and 7. This will be
// the lenght (with leading zeros) of the value of the Characters.
$nCharSize = 0;
$nUpperBound = 10;
$nLowerBound = 5;
$nCharSize = intval(($nUpperBound - $nLowerBound + 1) * $this->Rnd() + $nLowerBound);
// Encrypt the Size of the characters and convert it to String.
// This size has to be standard so we always get the right character.
$cCharSize = $this->fEncryptedKeySize($nCharSize);
// Convert the KeyNumber to String with leading zeros.
$cEncKey = $this->NumToString($nEncKey, $nCharSize);
// Get the text to encrypt and it's size.
$cEncryptedText = '';
$nTextLenght = strlen($eText);
// Loop thru the text one character at the time.
for($nCounter = 1; $nCounter <= $nTextLenght; $nCounter++)
{// Get the Next Character.
$cChar = $this->Mid($eText, $nCounter, 1);
// Get Ascii Value of the character multplied by the Key Number.
$nChar = ord($cChar) * $nEncKey;
// Get the String version of the Ascii Code with leading zeros.
// using the Random generated Key Lenght.
$cChar2 = $this->NumToString($nChar, $nCharSize);
// Add the Newly generated character to the encrypted text variable.
$cEncryptedText .= $cChar2;
}
// Separate the text in two to insert the enc
// key in the middle of the string.
$nLeft = intval(strlen($cEncryptedText) / 2);
$cLeft = $this->strleft($cEncryptedText, $nLeft);
$nRight = strlen($cEncryptedText) - $nLeft;
$cRight = $this->strright($cEncryptedText, $nRight);
// Add a Dummy string at the end to fool people.
$cDummy = $this->CreateDummy();
// Add all the strings together to get the final result.
$this->InsertInTheMiddle($cEncryptedText, $cEncKey);
$this->InsertInTheMiddle($cEncryptedText, $cCharSize);
$cEncryptedText = $this->CreateDummy() . $cEncryptedText . $this->CreateDummy();
return $cEncryptedText;
}
//------------------------------------------------------------------------------------
// Decrypt a chain of text.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $cText: Chain to decrypt.
//------------------------------------------------------------------------------------
function Decrypt_Text($cText)
{$cTempText = $cText;
$cDecryptedText = '';
$cText = '';
// Replace alpha characters for zeros.
for($nCounter = 1; $nCounter <= strlen($cTempText); $nCounter++)
{$cChar = $this->Mid($cTempText, $nCounter, 1);
if ($this->IsNumeric($cChar) == true)
$cText .= $cChar;
else
$cText .= '0';
}
// Get the size of the key.
$cText = $this->strleft($cText, strlen($cText) - 4);
$cText = $this->strright($cText, strlen($cText) - 4);
$nCharSize = 0;
$this->Extract_Char_Size($cText, $nCharSize);
$this->Extract_Enc_Key($cText, $nCharSize, $nEncKey);
// Decrypt the Size of the encrypted characters.
$nTextLenght = strlen($cText);
// Loop thru text in increments of the Key Size.
$nCounter = 1;
do
{// Get a Character the size of the key.
$cChar = $this->Mid($cText, $nCounter, $nCharSize);
// Get the value of the character.
$nChar = $this->Val($cChar);
// Divide the value by the Key to get the real value of the character.
if ($nEncKey > 0) $nChar2 = $nChar / $nEncKey;
// Convert the value to the character.
$cChar2 = chr($nChar2);
$cDecryptedText .= $cChar2;
$nCounter += $nCharSize;
}while ($nCounter <= strlen($cText));
// Clear any unwanted spaces and show the decrypted text.
return trim($cDecryptedText);
}
//------------------------------------------------------------------------------------
// Extract the Character Size from the middle of the exncrypted text.
//------------------------------------------------------------------------------------
// Par?etros
//------------------------------------------------------------------------------------
// &$cText: Cadena.
// &$nCharSize: Tama? de la cadena.
//------------------------------------------------------------------------------------
function Extract_Char_Size(&$cText, &$nCharSize)
{// Get the half left side of the text.
$nLeft = intval(strlen($cText) / 2);
$cLeft = $this->strleft($cText, $nLeft);
// Get the half right side of the text.
$nRight = strlen($cText) - $nLeft;
$cRight = $this->strright($cText, $nRight);
// Get the key from the text.
$nKeyEnc = $this->Val($this->strright($cLeft, 2));
$nKeySize = $this->Val($this->strleft($cRight, 2));
if ($nKeyEnc >= 5)
$nCharSize = $nKeySize + $nKeyEnc;
else
$nCharSize = $nKeySize - $nKeyEnc;
$cText = $this->strleft($cLeft, strlen($cLeft) - 2) . $this->strright($cRight, strlen($cRight) - 2);
}
//------------------------------------------------------------------------------------
// Extract the Encryption Key from the middle of the encrypted text.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// &$cText: Chain.
// $nCharSize: Length of the chain.
// &$nEncKey: Length of the chain encrypt.
//------------------------------------------------------------------------------------
function Extract_Enc_Key(&$cText, $nCharSize, &$nEncKey)
{$cEncKey = '';
// Get the real size of the text (without the previously
// stored character size).
$nLenght = strlen($cText) - $nCharSize;
// Get the half left and half right sides of the text.
$nLeft = intval($nLenght / 2);
$cLeft = $this->strleft($cText, $nLeft);
$nRight = $nLenght - $nLeft;
$cRight = $this->strright($cText, $nRight);
// Get the key from the text.
$cEncKey = $this->Mid($cText, $nLeft + 1, $nCharSize);
// Get the numeric value of the key.
$nEncKey = $this->Val(trim($cEncKey));
// Get the real text to decrypt (left side + right side).
$cText = $cLeft . $cRight;
}
//------------------------------------------------------------------------------------
// Just to fool people....never show the real size in the string but we need to know
// what we used in order to decrypt it so we will store the both in the string but
// maked.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $nKeySize: Length of the chain encrypt.
//------------------------------------------------------------------------------------
function fEncryptedKeySize($nKeySize)
{$nLowerBound = 0;
$nKeyEnc = intval(($nKeySize - $nLowerBound + 1) * $this->Rnd() + $nLowerBound);
if ($nKeyEnc >= 5)
$nKeySize = $nKeySize - $nKeyEnc;
else
$nKeySize = $nKeySize + $nKeyEnc;
return $this->NumToString($nKeyEnc, 2) . $this->NumToString($nKeySize, 2);
}
//------------------------------------------------------------------------------------
// Convert a number to string using a fixed size using zeros in front of the real
// number to match the desired size.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $nNumber: Chain that n Numbers contains.
// $nZeros: Quantity of zeros to add to the chain.
//------------------------------------------------------------------------------------
function NumToString($nNumber, $nZeros)
{// Check that the zeros to fill are not smaller than the actual size.
$cNumber = trim(strval($nNumber));
$nLenght = strlen($cNumber);
if ($nZeros < $nLenght) $nZeros = 0;
$nUpperBound = 122;
$nLowerBound = 65;
for($nCounter = 1; $nCounter <= ($nZeros - $nLenght); $nCounter++)
{// Add a zero in front of the string until we reach the desired size.
$lCreated = false;
do
{$nNumber = intval(($nUpperBound - $nLowerBound + 1) * $this->Rnd() + $nLowerBound);
if (($nNumber > 90) && ($nNumber < 97))
$lCreated = false;
else
$lCreated = true;
}while ($lCreated == false);
$cChar = chr($nNumber);
$cNumber = $cChar . $cNumber;
}
// Return the resulting string.
return $cNumber;
}
//------------------------------------------------------------------------------------
// Insert a string in the middle of another.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// &$cSourceText: Chain.
// $cTextToInsert: Chain to insert inside $cSourceText.
//------------------------------------------------------------------------------------
function InsertInTheMiddle(&$cSourceText, $cTextToInsert)
{// Get the half left and half right sides of the text.
$nLeft = intval(strlen($cSourceText) / 2);
$cLeft = $this->strleft($cSourceText, $nLeft);
$nRight = strlen($cSourceText) - $nLeft;
$cRight = $this->strright($cSourceText, $nRight);
// Insert cTextToString in the middle of cSourceText.
$cSourceText = $cLeft . $cTextToInsert . $cRight;
}
/////////////////////////////////////////////////////////////////////
// Function of chain handling. //
/////////////////////////////////////////////////////////////////////
//------------------------------------------------------------------------------------
// Returns a specification number of characters of the left side of a chain.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $tmp: Chain.
// $nLeft: Number of left characters to right.
//------------------------------------------------------------------------------------
function strleft($tmp, $nLeft)
{$len = strlen($tmp);
if ($nLeft == 0)
$str = '';
else if ($nLeft < $len)
$str = $this->Mid($tmp, 1, $nLeft);
return $str;
}
//------------------------------------------------------------------------------------
// Returns a specification number of characters of the right side of a chain.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $tmp: Chain.
// $nRight: Number of right characters to left.
//------------------------------------------------------------------------------------
function strright($tmp, $nRight)
{$len = strlen($tmp);
if ($nRight == 0)
$str = '';
else if ($nRight < $len)
$str = $this->Mid($tmp, $len - $nRight + 1, $len);
return $str;
}
//------------------------------------------------------------------------------------
// Returns a specification number of characters of a chain.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $tmp: Chain.
// $start: Starting position in the chain.
// $length: Quantity of left characters to right.
//------------------------------------------------------------------------------------
function Mid($tmp, $start, $length)
{$str = substr($tmp, $start - 1, $length);
return $str;
}
/////////////////////////////////////////////////////////////////////
// Functions for handling of numbers. //
/////////////////////////////////////////////////////////////////////
//------------------------------------------------------------------------------------
// Generates a Random number.
//------------------------------------------------------------------------------------
function Rnd()
{srand(); // Initialize random-number generator.
do
{$tmp = abs(tan(rand()));
}while (($tmp > "1") || ($tmp < "0"));
$tmp = $this->Mid($tmp, 1, 8);
return $tmp;
}
//------------------------------------------------------------------------------------
// Takes the numbers that it is in a chain.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $tmp: Chain.
//------------------------------------------------------------------------------------
function Val($tmp)
{$length = strlen($tmp);
$tmp2 = 0;
for ($i = 1; $i <= $length; $i++)
{$tmp1 = $this->Mid($tmp, $i, 1);
if ($this->IsNumeric($tmp1) == 1)
{$tmp2 .= $tmp1;}
}
return intval($tmp2);
}
//------------------------------------------------------------------------------------
// Returns if an expression you can evaluate as a number.
//------------------------------------------------------------------------------------
// Parameters
//------------------------------------------------------------------------------------
// $cChar: Chain.
//------------------------------------------------------------------------------------
function IsNumeric($cChar)
{$tmp = ord($cChar);
if (($tmp < 48) || ($tmp > 57))
$tmp = false;
else
$tmp = true;
return $tmp;
}
}
?>
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