the Solution .infact it's so easy to use rsakey file generated by .net .
------------rsa.class.php-------------------
/*
*fileName rsa.class.php
*author: laiyunqing<laiyunqing#gmail.com>
* Some constants
*/
define("BCCOMP_LARGER", 1);
class RSA
{
/*
* PHP implementation of the RSA algorithm
* (C) Copyright 2004 Edsko de Vries, Ireland
*
* Licensed under the GNU Public License (GPL)
*
* This implementation has been verified against [3]
* (tested Java/PHP interoperability).
*
* References:
* [1] "Applied Cryptography", Bruce Schneier, John Wiley & Sons, 1996
* [2] "Prime Number Hide-and-Seek", Brian Raiter, Muppetlabs (online)
* [3] "The Bouncy Castle Crypto Package", Legion of the Bouncy Castle,
* (open source cryptography library for Java, online)
* [4] "PKCS #1: RSA Encryption Standard", RSA Laboratories Technical Note,
* version 1.5, revised November 1, 1993
*/
/*
* Functions that are meant to be used by the user of this PHP module.
*
* Notes:
* - $key and $modulus should be numbers in (decimal) string format
* - $message is expected to be binary data
* - $keylength should be a multiple of 8, and should be in bits
* - For rsa_encrypt/rsa_sign, the length of $message should not exceed
* ($keylength / 8) - 11 (as mandated by [4]).
* - rsa_encrypt and rsa_sign will automatically add padding to the message.
* For rsa_encrypt, this padding will consist of random values; for rsa_sign,
* padding will consist of the appropriate number of 0xFF values (see [4])
* - rsa_decrypt and rsa_verify will automatically remove message padding.
* - Blocks for decoding (rsa_decrypt, rsa_verify) should be exactly
* ($keylength / 8) bytes long.
* - rsa_encrypt and rsa_verify expect a public key; rsa_decrypt and rsa_sign
* expect a private key.
*/
/**
* rsa encrypt data
*
* @param binary string $message
* @param unknown_type $public_key
* @param numbers $modulus
* @param numbers $keylength
* @return binary data
*/
function rsa_encrypt($message, $public_key, $modulus, $keylength)
{
$padded = RSA::add_PKCS1_padding($message, true, $keylength / 8);
$number = RSA::binary_to_number($padded);
$encrypted = RSA::pow_mod($number, $public_key, $modulus);
$result = RSA::number_to_binary($encrypted, $keylength / 8);
return $result;
}
function rsa_decrypt($message, $private_key, $modulus, $keylength)
{
$number = RSA::binary_to_number($message);
$decrypted = RSA::pow_mod($number, $private_key, $modulus);
$result = RSA::number_to_binary($decrypted, $keylength / 8);
return RSA::remove_PKCS1_padding($result, $keylength / 8);
}
function rsa_sign($message, $private_key, $modulus, $keylength)
{
$padded = RSA::add_PKCS1_padding($message, false, $keylength / 8);
$number = RSA::binary_to_number($padded);
$signed = RSA::pow_mod($number, $private_key, $modulus);
$result = RSA::number_to_binary($signed, $keylength / 8);
return $result;
}
function rsa_verify($message, $public_key, $modulus, $keylength)
{
return RSA::rsa_decrypt($message, $public_key, $modulus, $keylength);
}
function rsa_kyp_verify($message, $public_key, $modulus, $keylength)
{
$number = RSA::binary_to_number($message);
$decrypted = RSA::pow_mod($number, $public_key, $modulus);
$result = RSA::number_to_binary($decrypted, $keylength / 8);
return RSA::remove_KYP_padding($result, $keylength / 8);
}
/*
* The actual implementation.
* Requires BCMath support in PHP (compile with --enable-bcmath)
*/
//--
// Calculate (p ^ q) mod r
//
// We need some trickery to [2]:
// (a) Avoid calculating (p ^ q) before (p ^ q) mod r, because for typical RSA
// applications, (p ^ q) is going to be _WAY_ too large.
// (I mean, __WAY__ too large - won't fit in your computer's memory.)
// (b) Still be reasonably efficient.
//
// We assume p, q and r are all positive, and that r is non-zero.
//
// Note that the more simple algorithm of multiplying $p by itself $q times, and
// applying "mod $r" at every step is also valid, but is O($q), whereas this
// algorithm is O(log $q). Big difference.
//
// As far as I can see, the algorithm I use is optimal; there is no redundancy
// in the calculation of the partial results.
//--
function pow_mod($p, $q, $r)
{
// Extract powers of 2 from $q
$factors = array();
$div = $q;
$power_of_two = 0;
while(bccomp($div, "0") == BCCOMP_LARGER)
{
$rem = bcmod($div, 2);
$div = bcdiv($div, 2);
if($rem) array_push($factors, $power_of_two);
$power_of_two++;
}
// Calculate partial results for each factor, using each partial result as a
// starting point for the next. This depends of the factors of two being
// generated in increasing order.
$partial_results = array();
$part_res = $p;
$idx = 0;
foreach($factors as $factor)
{
while($idx < $factor)
{
$part_res = bcpow($part_res, "2");
$part_res = bcmod($part_res, $r);
$idx++;
}
array_push($partial_results, $part_res);
}
// Calculate final result
$result = "1";
foreach($partial_results as $part_res)
{
$result = bcmul($result, $part_res);
$result = bcmod($result, $r);
}
return $result;
}
//--
// Function to add padding to a decrypted string
// We need to know if this is a private or a public key operation [4]
//--
function add_PKCS1_padding($data, $isPublicKey, $blocksize)
{
$pad_length = $blocksize - 3 - strlen($data);
if($isPublicKey)
{
$block_type = "";
$padding = "";
for($i = 0; $i < $pad_length; $i++)
{
$rnd = mt_rand(1, 255);
$padding .= chr($rnd);
}
}
else
{
$block_type = "";
$padding = str_repeat("ÿ", $pad_length);
}
return "" . $block_type . $padding . "" . $data;
}
//--
// Remove padding from a decrypted string
// See [4] for more details.
//--
function remove_PKCS1_padding($data, $blocksize)
{
assert(strlen($data) == $blocksize);
$data = substr($data, 1);
// We cannot deal with block type 0
if($data{0} == '')
die("Block type 0 not implemented.");
// Then the block type must be 1 or 2
assert(($data{0} == "") || ($data{0} == ""));
// Remove the padding
$offset = strpos($data, "", 1);
return substr($data, $offset + 1);
}
//--
// Remove "kyp" padding
// (Non standard)
//--
function remove_KYP_padding($data, $blocksize)
{
assert(strlen($data) == $blocksize);
$offset = strpos($data, "");
return substr($data, 0, $offset);
}
//--
// Convert binary data to a decimal number
//--
function binary_to_number($data)
{
$base = "256";
$radix = "1";
$result = "0";
for($i = strlen($data) - 1; $i >= 0; $i--)
{
$digit = ord($data{$i});
$part_res = bcmul($digit, $radix);
$result = bcadd($result, $part_res);
$radix = bcmul($radix, $base);
}
return $result;
}
//--
// Convert a number back into binary form
//--
function number_to_binary($number, $blocksize)
{
$base = "256";
$result = "";
$div = $number;
while($div > 0)
{
$mod = bcmod($div, $base);
$div = bcdiv($div, $base);
$result = chr($mod) . $result;
}
return str_pad($result, $blocksize, "", STR_PAD_LEFT);
}
}
?>
-------------RSAProcessor.class.php------------------------
/**
*fileName RSAProcessor.class.php
*author: laiyunqing<laiyunqing#gmail.com>
*/
require_once("rsa.class.php");
class RSAProcessor
{
private $public_key = null;
private $private_key = null;
private $modulus = null;
private $key_length = "1024";
public function __construct($xmlRsakey=null,$type=null)
{
$xmlObj = null;
if($xmlRsakey==null)
{
$xmlObj = simplexml_load_file("xmlfile/RSAKey.xml");
}
elseif($type==RSAKeyType::XMLFile)
{
$xmlObj = simplexml_load_file($xmlRsakey);
}
else
{
$xmlObj = simplexml_load_string($xmlRsakey);
}
$this->modulus = RSA::binary_to_number(base64_decode($xmlObj->Modulus));
$this->public_key = RSA::binary_to_number(base64_decode($xmlObj->Exponent));
$this->key_length = strlen(base64_decode($xmlObj->Modulus))*8;
}
/**
* get public key
*
* @return string public key
*/
public function getPublicKey()
{
//return base64_encode(RSA::number_to_binary($this->public_key,($this->key_length)/8));
return $this->public_key;
}
public function getPrivateKey()
{
//return base64_encode(RSA::number_to_binary($this->private_key,($this->key_length)/8));
return $this->private_key;
}
public function getKeyLength()
{
return $this->key_length;
}
public function getModulus()
{
return $this->modulus;
}
/**
* encrypt data
*
* @param string $data
* @return base64 encoded binary string
*/
public function encrypt($data)
{
return base64_encode(RSA::rsa_encrypt($data,$this->public_key,$this->modulus,$this->key_length));
}
public function dencrypt($data)
{
return RSA::rsa_decrypt($data,$this->private_key,$this->modulus,$this->key_length);
}
public function sign($data)
{
return RSA::rsa_sign($data,$this->private_key,$this->modulus,$this->key_length);
}
public function verify($data)
{
return RSA::rsa_verify($data,$this->public_key,$this->modulus,$this->key_length);
}
}
class RSAKeyType
{
const XMLFile = 0;
const XMLString = 1;
}
?>
-------------- encrypt data with public key-----------------
/**
*fileName testrsa.php
*author: laiyunqing<laiyunqing#gmail.com>
*/
require_once("RSAProcessor.class.php");
$processor = new RSAProcessor
("<RSAKeyValue><Modulus>m6ljoeWhmnd0oRnsVEH5iNw3B8+vKVu7v7CVfMyf6bnKEzHa62TRmT/baJiSevoI/vgm2ph/s1JrQQTaGiErHicigwSC
Aw7+i05WFbnz7tOyiiJJVMfsdd+v7Xan9Hiud05FzxoMbM8vpiMHPEIDbGJ1MiXyupTVkz2WcMHyBoJ4S189opktZ43pviUhy0PeuWkyoU7zR54akPmK
Yg+z5Zr1r7K8lUZ1a3TThfJGxTQR/uZMtZz/q8QF0AANVQ/eyahTv9icBzBoDuncS0Y5l3vqogW1C/ltJvhJpvSn/OgjbRjuixCAptOUmRd13sDWU95/
x0bMq+Lg68lj2OjJ1Q==</Modulus><Exponent>AQAB</Exponent><P>zfvdBsMLlmo+4PAUYLgSV2xyyVa7ZqFjkJaAE4EbYuH24EoZjrzeiJR++D
FUT/GUhjfZ5eZ/5e29dXwk0sKUw6nHzBdBtOPp5fr4t5SKLEcWY+J+zLUSOlhG9NUkohFf6+Miy2Y7BLpXVrcl6UwXV0ak8KkTPB2l/aIMwYj5dgc=</
P><Q>wXV0sA3nDzoSDQA/4QSu/WIlBhkA3jZ7K7G9Z9rpP1A0vH+bZeyCIyo52u8ahGuYbubaizF1XMp+Xv3Mh2KmRbt7+UptwEwbFAUiiad2a312mqm
j7IJd7gRjGkyzKEm+6fpNeY3NFLNVNhccBqzhNkRoM22xnvQcImD10XVAakM=</Q><DP>wd1HdCLEWCfc0DYE59a2pINUMXyo2foRTDbpifHcRZ+ojAY
Rsc6+nsssCQnccXVMNVqBgSgEvfGYe+eAfMBX5SN5APPuioJrVGF2DsoFlZC+WPoGH0JYSoNlHO8yEDrMDaXzzH2GFHgQ1XOAged0nFbHzB1FFjJNVL5
cxRXWu6c=</DP><DQ>QDKuCk5SwubOXqoaiJ15RHRxPNjHRPZnYVSWOgSXKn9/QJ5H/0bA2NKGaHS4JAFgkEzjcRV0kNpRnUwztymxa6qPtWZRjWK0Ca
y6jVuZHIqB9UkeMLoCWZ3zFSMmwNPYGuUJGLFJwPjR6iU5E64C/nMs8QQR0WHIhFAQwvVZ7uk=</DQ><InverseQ>JckMSlJR10VZdnp83VPjrZ/Z+63
CGu3tWHm7f4DJ8IwjJWr8FlCpbSwiP6a4e9Upv6bUn/tOj2gY6MMq5G5yTKm2SCRvpUKRu4NCmWAt7vlFv0Z6pkXlTOpzvVjv3v16+dIZOA5Zn+v7+r1
xbdYdH20KRAbiBO3MfQP7s+VJJvM=</InverseQ><D>W1xrBr2hQOj1wgxWAgoK7IHbprEFrK+TnWmGA46SGPsbmHJ9fAVbY6fwHg7Wgmk4WHXLUCeLY
/Nu0eWIISfwh60Oe3ls2WC2k4qxyeSvQDBuLNb81U7WAUT9m9E1uK4QMCP3oxs1ybM80zTh7UMNgVK0WG+fbFUomVffcWTTqW+Fu12PEIO+UR/85oq+x
qVlTzYAEzt1OE9IhkYiRzi99ePXeH2gFltzJ/fb/7jLsDTkhM2eiYTGyOTZmBnen6c6a8b9LFTY4Bc0bGpk5ezHkub6F8p2ZgL/JgIOJMyRZICjDjs+9
k9PTmMTFsCF6xzHY15Fg25xIDYzIyx1rrRUjQ==</D></RSAKeyValue>",RSAKeyType::XMLString);
$rs = $processor->encrypt("Hello,It's Works.");
echo $rs;
?>