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-<?php
-/**
- * Crypt_RSA allows to do following operations:
- * - key pair generation
- * - encryption and decryption
- * - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt. If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category Encryption
- * @package Crypt_RSA
- * @author Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005 Alexander Valyalkin
- * @license http://www.php.net/license/3_0.txt PHP License 3.0
- * @version CVS: $Id: KeyPair.php,v 1.7 2009/01/05 08:30:29 clockwerx Exp $
- * @link http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * RSA error handling facilities
- */
-require_once 'Crypt/RSA/ErrorHandler.php';
-
-/**
- * loader for RSA math wrappers
- */
-require_once 'Crypt/RSA/MathLoader.php';
-
-/**
- * helper class for single key managing
- */
-require_once 'Crypt/RSA/Key.php';
-
-/**
- * Crypt_RSA_KeyPair class, derived from Crypt_RSA_ErrorHandler
- *
- * Provides the following functions:
- * - generate($key) - generates new key pair
- * - getPublicKey() - returns public key
- * - getPrivateKey() - returns private key
- * - getKeyLength() - returns bit key length
- * - setRandomGenerator($func_name) - sets random generator to $func_name
- * - fromPEMString($str) - retrieves keypair from PEM-encoded string
- * - toPEMString() - stores keypair to PEM-encoded string
- * - isEqual($keypair2) - compares current keypair to $keypair2
- *
- * Example usage:
- * // create new 1024-bit key pair
- * $key_pair = new Crypt_RSA_KeyPair(1024);
- *
- * // error check
- * if ($key_pair->isError()) {
- * echo "error while initializing Crypt_RSA_KeyPair object:\n";
- * $erorr = $key_pair->getLastError();
- * echo $error->getMessage(), "\n";
- * }
- *
- * // get public key
- * $public_key = $key_pair->getPublicKey();
- *
- * // get private key
- * $private_key = $key_pair->getPrivateKey();
- *
- * // generate new 512-bit key pair
- * $key_pair->generate(512);
- *
- * // error check
- * if ($key_pair->isError()) {
- * echo "error while generating key pair:\n";
- * $erorr = $key_pair->getLastError();
- * echo $error->getMessage(), "\n";
- * }
- *
- * // get key pair length
- * $length = $key_pair->getKeyLength();
- *
- * // set random generator to $func_name, where $func_name
- * // consists name of random generator function. See comments
- * // before setRandomGenerator() method for details
- * $key_pair->setRandomGenerator($func_name);
- *
- * // error check
- * if ($key_pair->isError()) {
- * echo "error while changing random generator:\n";
- * $erorr = $key_pair->getLastError();
- * echo $error->getMessage(), "\n";
- * }
- *
- * // using factory() method instead of constructor (it returns PEAR_Error object on failure)
- * $rsa_obj = &Crypt_RSA_KeyPair::factory($key_len);
- * if (PEAR::isError($rsa_obj)) {
- * echo "error: ", $rsa_obj->getMessage(), "\n";
- * }
- *
- * // read key pair from PEM-encoded string:
- * $str = "-----BEGIN RSA PRIVATE KEY-----"
- * . "MCsCAQACBHr5LDkCAwEAAQIEBc6jbQIDAOCfAgMAjCcCAk3pAgJMawIDAL41"
- * . "-----END RSA PRIVATE KEY-----";
- * $keypair = Crypt_RSA_KeyPair::fromPEMString($str);
- *
- * // read key pair from .pem file 'private.pem':
- * $str = file_get_contents('private.pem');
- * $keypair = Crypt_RSA_KeyPair::fromPEMString($str);
- *
- * // generate and write 1024-bit key pair to .pem file 'private_new.pem'
- * $keypair = new Crypt_RSA_KeyPair(1024);
- * $str = $keypair->toPEMString();
- * file_put_contents('private_new.pem', $str);
- *
- * // compare $keypair1 to $keypair2
- * if ($keypair1->isEqual($keypair2)) {
- * echo "keypair1 = keypair2\n";
- * }
- * else {
- * echo "keypair1 != keypair2\n";
- * }
- *
- * @category Encryption
- * @package Crypt_RSA
- * @author Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005 Alexander Valyalkin
- * @license http://www.php.net/license/3_0.txt PHP License 3.0
- * @version Release: @package_version@
- * @link http://pear.php.net/package/Crypt_RSA
- * @access public
- */
-class Crypt_RSA_KeyPair extends Crypt_RSA_ErrorHandler
-{
- /**
- * Reference to math wrapper object, which is used to
- * manipulate large integers in RSA algorithm.
- *
- * @var object of Crypt_RSA_Math_* class
- * @access private
- */
- var $_math_obj;
-
- /**
- * length of each key in the key pair
- *
- * @var int
- * @access private
- */
- var $_key_len;
-
- /**
- * public key
- *
- * @var object of Crypt_RSA_KEY class
- * @access private
- */
- var $_public_key;
-
- /**
- * private key
- *
- * @var object of Crypt_RSA_KEY class
- * @access private
- */
- var $_private_key;
-
- /**
- * name of function, which is used as random generator
- *
- * @var string
- * @access private
- */
- var $_random_generator;
-
- /**
- * RSA keypair attributes [version, n, e, d, p, q, dmp1, dmq1, iqmp] as associative array
- *
- * @var array
- * @access private
- */
- var $_attrs;
-
- /**
- * Returns names of keypair attributes from $this->_attrs array
- *
- * @return array Array of keypair attributes names
- * @access private
- */
- function _get_attr_names()
- {
- return array('version', 'n', 'e', 'd', 'p', 'q', 'dmp1', 'dmq1', 'iqmp');
- }
-
- /**
- * Parses ASN.1 string [$str] starting form position [$pos].
- * Returns tag and string value of parsed object.
- *
- * @param string $str
- * @param int &$pos
- * @param Crypt_RSA_ErrorHandler &$err_handler
- *
- * @return mixed Array('tag' => ..., 'str' => ...) on success, false on error
- * @access private
- */
- function _ASN1Parse($str, &$pos, &$err_handler)
- {
- $max_pos = strlen($str);
- if ($max_pos < 2) {
- $err_handler->pushError("ASN.1 string too short");
- return false;
- }
-
- // get ASN.1 tag value
- $tag = ord($str[$pos++]) & 0x1f;
- if ($tag == 0x1f) {
- $tag = 0;
- do {
- $n = ord($str[$pos++]);
- $tag <<= 7;
- $tag |= $n & 0x7f;
- } while (($n & 0x80) && $pos < $max_pos);
- }
- if ($pos >= $max_pos) {
- $err_handler->pushError("ASN.1 string too short");
- return false;
- }
-
- // get ASN.1 object length
- $len = ord($str[$pos++]);
- if ($len & 0x80) {
- $n = $len & 0x1f;
- $len = 0;
- while ($n-- && $pos < $max_pos) {
- $len <<= 8;
- $len |= ord($str[$pos++]);
- }
- }
- if ($pos >= $max_pos || $len > $max_pos - $pos) {
- $err_handler->pushError("ASN.1 string too short");
- return false;
- }
-
- // get string value of ASN.1 object
- $str = substr($str, $pos, $len);
-
- return array(
- 'tag' => $tag,
- 'str' => $str,
- );
- }
-
- /**
- * Parses ASN.1 sting [$str] starting from position [$pos].
- * Returns string representation of number, which can be passed
- * in bin2int() function of math wrapper.
- *
- * @param string $str
- * @param int &$pos
- * @param Crypt_RSA_ErrorHandler &$err_handler
- *
- * @return mixed string representation of parsed number on success, false on error
- * @access private
- */
- function _ASN1ParseInt($str, &$pos, &$err_handler)
- {
- $tmp = Crypt_RSA_KeyPair::_ASN1Parse($str, $pos, $err_handler);
- if ($err_handler->isError()) {
- return false;
- }
- if ($tmp['tag'] != 0x02) {
- $errstr = sprintf("wrong ASN tag value: 0x%02x. Expected 0x02 (INTEGER)", $tmp['tag']);
- $err_handler->pushError($errstr);
- return false;
- }
- $pos += strlen($tmp['str']);
-
- return strrev($tmp['str']);
- }
-
- /**
- * Constructs ASN.1 string from tag $tag and object $str
- *
- * @param string $str ASN.1 object string
- * @param int $tag ASN.1 tag value
- * @param bool $is_constructed
- * @param bool $is_private
- *
- * @return ASN.1-encoded string
- * @access private
- */
- function _ASN1Store($str, $tag, $is_constructed = false, $is_private = false)
- {
- $out = '';
-
- // encode ASN.1 tag value
- $tag_ext = ($is_constructed ? 0x20 : 0) | ($is_private ? 0xc0 : 0);
- if ($tag < 0x1f) {
- $out .= chr($tag | $tag_ext);
- } else {
- $out .= chr($tag_ext | 0x1f);
- $tmp = chr($tag & 0x7f);
- $tag >>= 7;
- while ($tag) {
- $tmp .= chr(($tag & 0x7f) | 0x80);
- $tag >>= 7;
- }
- $out .= strrev($tmp);
- }
-
- // encode ASN.1 object length
- $len = strlen($str);
- if ($len < 0x7f) {
- $out .= chr($len);
- } else {
- $tmp = '';
- $n = 0;
- while ($len) {
- $tmp .= chr($len & 0xff);
- $len >>= 8;
- $n++;
- }
- $out .= chr($n | 0x80);
- $out .= strrev($tmp);
- }
-
- return $out . $str;
- }
-
- /**
- * Constructs ASN.1 string from binary representation of big integer
- *
- * @param string $str binary representation of big integer
- *
- * @return ASN.1-encoded string
- * @access private
- */
- function _ASN1StoreInt($str)
- {
- $str = strrev($str);
- return Crypt_RSA_KeyPair::_ASN1Store($str, 0x02);
- }
-
- /**
- * Crypt_RSA_KeyPair constructor.
- *
- * Wrapper: name of math wrapper, which will be used to
- * perform different operations with big integers.
- * See contents of Crypt/RSA/Math folder for examples of wrappers.
- * Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
- *
- * @param int $key_len bit length of key pair, which will be generated in constructor
- * @param string $wrapper_name wrapper name
- * @param string $error_handler name of error handler function
- * @param callback $random_generator function which will be used as random generator
- *
- * @access public
- */
- function Crypt_RSA_KeyPair($key_len, $wrapper_name = 'default', $error_handler = '', $random_generator = null)
- {
- // set error handler
- $this->setErrorHandler($error_handler);
- // try to load math wrapper
- $obj = &Crypt_RSA_MathLoader::loadWrapper($wrapper_name);
- if ($this->isError($obj)) {
- // error during loading of math wrapper
- $this->pushError($obj);
- return;
- }
- $this->_math_obj = &$obj;
-
- // set random generator
- if (!$this->setRandomGenerator($random_generator)) {
- // error in setRandomGenerator() function
- return;
- }
-
- if (is_array($key_len)) {
- // ugly BC hack - it is possible to pass RSA private key attributes [version, n, e, d, p, q, dmp1, dmq1, iqmp]
- // as associative array instead of key length to Crypt_RSA_KeyPair constructor
- $rsa_attrs = $key_len;
-
- // convert attributes to big integers
- $attr_names = $this->_get_attr_names();
- foreach ($attr_names as $attr) {
- if (!isset($rsa_attrs[$attr])) {
- $this->pushError("missing required RSA attribute [$attr]");
- return;
- }
- ${$attr} = $this->_math_obj->bin2int($rsa_attrs[$attr]);
- }
-
- // check primality of p and q
- if (!$this->_math_obj->isPrime($p)) {
- $this->pushError("[p] must be prime");
- return;
- }
- if (!$this->_math_obj->isPrime($q)) {
- $this->pushError("[q] must be prime");
- return;
- }
-
- // check n = p * q
- $n1 = $this->_math_obj->mul($p, $q);
- if ($this->_math_obj->cmpAbs($n, $n1)) {
- $this->pushError("n != p * q");
- return;
- }
-
- // check e * d = 1 mod (p-1) * (q-1)
- $p1 = $this->_math_obj->dec($p);
- $q1 = $this->_math_obj->dec($q);
- $p1q1 = $this->_math_obj->mul($p1, $q1);
- $ed = $this->_math_obj->mul($e, $d);
- $one = $this->_math_obj->mod($ed, $p1q1);
- if (!$this->_math_obj->isOne($one)) {
- $this->pushError("e * d != 1 mod (p-1)*(q-1)");
- return;
- }
-
- // check dmp1 = d mod (p-1)
- $dmp = $this->_math_obj->mod($d, $p1);
- if ($this->_math_obj->cmpAbs($dmp, $dmp1)) {
- $this->pushError("dmp1 != d mod (p-1)");
- return;
- }
-
- // check dmq1 = d mod (q-1)
- $dmq = $this->_math_obj->mod($d, $q1);
- if ($this->_math_obj->cmpAbs($dmq, $dmq1)) {
- $this->pushError("dmq1 != d mod (q-1)");
- return;
- }
-
- // check iqmp = 1/q mod p
- $q1 = $this->_math_obj->invmod($iqmp, $p);
- if ($this->_math_obj->cmpAbs($q, $q1)) {
- $this->pushError("iqmp != 1/q mod p");
- return;
- }
-
- // try to create public key object
- $public_key = &new Crypt_RSA_Key($rsa_attrs['n'], $rsa_attrs['e'], 'public', $wrapper_name, $error_handler);
- if ($public_key->isError()) {
- // error during creating public object
- $this->pushError($public_key->getLastError());
- return;
- }
-
- // try to create private key object
- $private_key = &new Crypt_RSA_Key($rsa_attrs['n'], $rsa_attrs['d'], 'private', $wrapper_name, $error_handler);
- if ($private_key->isError()) {
- // error during creating private key object
- $this->pushError($private_key->getLastError());
- return;
- }
-
- $this->_public_key = $public_key;
- $this->_private_key = $private_key;
- $this->_key_len = $public_key->getKeyLength();
- $this->_attrs = $rsa_attrs;
- } else {
- // generate key pair
- if (!$this->generate($key_len)) {
- // error during generating key pair
- return;
- }
- }
- }
-
- /**
- * Crypt_RSA_KeyPair factory.
- *
- * Wrapper - Name of math wrapper, which will be used to
- * perform different operations with big integers.
- * See contents of Crypt/RSA/Math folder for examples of wrappers.
- * Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
- *
- * @param int $key_len bit length of key pair, which will be generated in constructor
- * @param string $wrapper_name wrapper name
- * @param string $error_handler name of error handler function
- * @param callback $random_generator function which will be used as random generator
- *
- * @return object new Crypt_RSA_KeyPair object on success or PEAR_Error object on failure
- * @access public
- */
- function &factory($key_len, $wrapper_name = 'default', $error_handler = '', $random_generator = null)
- {
- $obj = &new Crypt_RSA_KeyPair($key_len, $wrapper_name, $error_handler, $random_generator);
- if ($obj->isError()) {
- // error during creating a new object. Return PEAR_Error object
- return $obj->getLastError();
- }
- // object created successfully. Return it
- return $obj;
- }
-
- /**
- * Generates new Crypt_RSA key pair with length $key_len.
- * If $key_len is missed, use an old key length from $this->_key_len
- *
- * @param int $key_len bit length of key pair, which will be generated
- *
- * @return bool true on success or false on error
- * @access public
- */
- function generate($key_len = null)
- {
- if (is_null($key_len)) {
- // use an old key length
- $key_len = $this->_key_len;
- if (is_null($key_len)) {
- $this->pushError('missing key_len parameter', CRYPT_RSA_ERROR_MISSING_KEY_LEN);
- return false;
- }
- }
-
- // minimal key length is 8 bit ;)
- if ($key_len < 8) {
- $key_len = 8;
- }
- // store key length in the _key_len property
- $this->_key_len = $key_len;
-
- // set [e] to 0x10001 (65537)
- $e = $this->_math_obj->bin2int("\x01\x00\x01");
-
- // generate [p], [q] and [n]
- $p_len = intval(($key_len + 1) / 2);
- $q_len = $key_len - $p_len;
- $p1 = $q1 = 0;
- do {
- // generate prime number [$p] with length [$p_len] with the following condition:
- // GCD($e, $p - 1) = 1
- do {
- $p = $this->_math_obj->getPrime($p_len, $this->_random_generator);
- $p1 = $this->_math_obj->dec($p);
- $tmp = $this->_math_obj->GCD($e, $p1);
- } while (!$this->_math_obj->isOne($tmp));
- // generate prime number [$q] with length [$q_len] with the following conditions:
- // GCD($e, $q - 1) = 1
- // $q != $p
- do {
- $q = $this->_math_obj->getPrime($q_len, $this->_random_generator);
- $q1 = $this->_math_obj->dec($q);
- $tmp = $this->_math_obj->GCD($e, $q1);
- } while (!$this->_math_obj->isOne($tmp) && !$this->_math_obj->cmpAbs($q, $p));
- // if (p < q), then exchange them
- if ($this->_math_obj->cmpAbs($p, $q) < 0) {
- $tmp = $p;
- $p = $q;
- $q = $tmp;
- $tmp = $p1;
- $p1 = $q1;
- $q1 = $tmp;
- }
- // calculate n = p * q
- $n = $this->_math_obj->mul($p, $q);
- } while ($this->_math_obj->bitLen($n) != $key_len);
-
- // calculate d = 1/e mod (p - 1) * (q - 1)
- $pq = $this->_math_obj->mul($p1, $q1);
- $d = $this->_math_obj->invmod($e, $pq);
-
- // calculate dmp1 = d mod (p - 1)
- $dmp1 = $this->_math_obj->mod($d, $p1);
-
- // calculate dmq1 = d mod (q - 1)
- $dmq1 = $this->_math_obj->mod($d, $q1);
-
- // calculate iqmp = 1/q mod p
- $iqmp = $this->_math_obj->invmod($q, $p);
-
- // store RSA keypair attributes
- $this->_attrs = array(
- 'version' => "\x00",
- 'n' => $this->_math_obj->int2bin($n),
- 'e' => $this->_math_obj->int2bin($e),
- 'd' => $this->_math_obj->int2bin($d),
- 'p' => $this->_math_obj->int2bin($p),
- 'q' => $this->_math_obj->int2bin($q),
- 'dmp1' => $this->_math_obj->int2bin($dmp1),
- 'dmq1' => $this->_math_obj->int2bin($dmq1),
- 'iqmp' => $this->_math_obj->int2bin($iqmp),
- );
-
- $n = $this->_attrs['n'];
- $e = $this->_attrs['e'];
- $d = $this->_attrs['d'];
-
- // try to create public key object
- $obj = &new Crypt_RSA_Key($n, $e, 'public', $this->_math_obj->getWrapperName(), $this->_error_handler);
- if ($obj->isError()) {
- // error during creating public object
- $this->pushError($obj->getLastError());
- return false;
- }
- $this->_public_key = &$obj;
-
- // try to create private key object
- $obj = &new Crypt_RSA_Key($n, $d, 'private', $this->_math_obj->getWrapperName(), $this->_error_handler);
- if ($obj->isError()) {
- // error during creating private key object
- $this->pushError($obj->getLastError());
- return false;
- }
- $this->_private_key = &$obj;
-
- return true; // key pair successfully generated
- }
-
- /**
- * Returns public key from the pair
- *
- * @return object public key object of class Crypt_RSA_Key
- * @access public
- */
- function getPublicKey()
- {
- return $this->_public_key;
- }
-
- /**
- * Returns private key from the pair
- *
- * @return object private key object of class Crypt_RSA_Key
- * @access public
- */
- function getPrivateKey()
- {
- return $this->_private_key;
- }
-
- /**
- * Sets name of random generator function for key generation.
- * If parameter is skipped, then sets to default random generator.
- *
- * Random generator function must return integer with at least 8 lower
- * significant bits, which will be used as random values.
- *
- * @param string $random_generator name of random generator function
- *
- * @return bool true on success or false on error
- * @access public
- */
- function setRandomGenerator($random_generator = null)
- {
- static $default_random_generator = null;
-
- if (is_string($random_generator)) {
- // set user's random generator
- if (!function_exists($random_generator)) {
- $this->pushError("can't find random generator function with name [{$random_generator}]");
- return false;
- }
- $this->_random_generator = $random_generator;
- } else {
- // set default random generator
- $this->_random_generator = is_null($default_random_generator) ?
- ($default_random_generator = create_function('', '$a=explode(" ",microtime());return(int)($a[0]*1000000);')) :
- $default_random_generator;
- }
- return true;
- }
-
- /**
- * Returns length of each key in the key pair
- *
- * @return int bit length of each key in key pair
- * @access public
- */
- function getKeyLength()
- {
- return $this->_key_len;
- }
-
- /**
- * Retrieves RSA keypair from PEM-encoded string, containing RSA private key.
- * Example of such string:
- * -----BEGIN RSA PRIVATE KEY-----
- * MCsCAQACBHtvbSECAwEAAQIEeYrk3QIDAOF3AgMAjCcCAmdnAgJMawIDALEk
- * -----END RSA PRIVATE KEY-----
- *
- * Wrapper: Name of math wrapper, which will be used to
- * perform different operations with big integers.
- * See contents of Crypt/RSA/Math folder for examples of wrappers.
- * Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
- *
- * @param string $str PEM-encoded string
- * @param string $wrapper_name Wrapper name
- * @param string $error_handler name of error handler function
- *
- * @return Crypt_RSA_KeyPair object on success, PEAR_Error object on error
- * @access public
- * @static
- */
- function &fromPEMString($str, $wrapper_name = 'default', $error_handler = '')
- {
- if (isset($this)) {
- if ($wrapper_name == 'default') {
- $wrapper_name = $this->_math_obj->getWrapperName();
- }
- if ($error_handler == '') {
- $error_handler = $this->_error_handler;
- }
- }
- $err_handler = &new Crypt_RSA_ErrorHandler;
- $err_handler->setErrorHandler($error_handler);
-
- // search for base64-encoded private key
- if (!preg_match('/-----BEGIN RSA PRIVATE KEY-----([^-]+)-----END RSA PRIVATE KEY-----/', $str, $matches)) {
- $err_handler->pushError("can't find RSA private key in the string [{$str}]");
- return $err_handler->getLastError();
- }
-
- // parse private key. It is ASN.1-encoded
- $str = base64_decode($matches[1]);
- $pos = 0;
- $tmp = Crypt_RSA_KeyPair::_ASN1Parse($str, $pos, $err_handler);
- if ($err_handler->isError()) {
- return $err_handler->getLastError();
- }
- if ($tmp['tag'] != 0x10) {
- $errstr = sprintf("wrong ASN tag value: 0x%02x. Expected 0x10 (SEQUENCE)", $tmp['tag']);
- $err_handler->pushError($errstr);
- return $err_handler->getLastError();
- }
-
- // parse ASN.1 SEQUENCE for RSA private key
- $attr_names = Crypt_RSA_KeyPair::_get_attr_names();
- $n = sizeof($attr_names);
- $rsa_attrs = array();
- for ($i = 0; $i < $n; $i++) {
- $tmp = Crypt_RSA_KeyPair::_ASN1ParseInt($str, $pos, $err_handler);
- if ($err_handler->isError()) {
- return $err_handler->getLastError();
- }
- $attr = $attr_names[$i];
- $rsa_attrs[$attr] = $tmp;
- }
-
- // create Crypt_RSA_KeyPair object.
- $keypair = &new Crypt_RSA_KeyPair($rsa_attrs, $wrapper_name, $error_handler);
- if ($keypair->isError()) {
- return $keypair->getLastError();
- }
-
- return $keypair;
- }
-
- /**
- * converts keypair to PEM-encoded string, which can be stroed in
- * .pem compatible files, contianing RSA private key.
- *
- * @return string PEM-encoded keypair on success, false on error
- * @access public
- */
- function toPEMString()
- {
- // store RSA private key attributes into ASN.1 string
- $str = '';
- $attr_names = $this->_get_attr_names();
- $n = sizeof($attr_names);
- $rsa_attrs = $this->_attrs;
- for ($i = 0; $i < $n; $i++) {
- $attr = $attr_names[$i];
- if (!isset($rsa_attrs[$attr])) {
- $this->pushError("Cannot find value for ASN.1 attribute [$attr]");
- return false;
- }
- $tmp = $rsa_attrs[$attr];
- $str .= Crypt_RSA_KeyPair::_ASN1StoreInt($tmp);
- }
-
- // prepend $str by ASN.1 SEQUENCE (0x10) header
- $str = Crypt_RSA_KeyPair::_ASN1Store($str, 0x10, true);
-
- // encode and format PEM string
- $str = base64_encode($str);
- $str = chunk_split($str, 64, "\n");
- return "-----BEGIN RSA PRIVATE KEY-----\n$str-----END RSA PRIVATE KEY-----\n";
- }
-
- /**
- * Compares keypairs in Crypt_RSA_KeyPair objects $this and $key_pair
- *
- * @param Crypt_RSA_KeyPair $key_pair keypair to compare
- *
- * @return bool true, if keypair stored in $this equal to keypair stored in $key_pair
- * @access public
- */
- function isEqual($key_pair)
- {
- $attr_names = $this->_get_attr_names();
- foreach ($attr_names as $attr) {
- if ($this->_attrs[$attr] != $key_pair->_attrs[$attr]) {
- return false;
- }
- }
- return true;
- }
-}
-
-?>
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-09 01:17:47 +0000