| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* Pure-PHP PKCS#1 (v2.1) compliant implementation of RSA. |
| 5 |
* |
| 6 |
* PHP versions 4 and 5 |
| 7 |
* |
| 8 |
* Here's an example of how to encrypt and decrypt text with this library: |
| 9 |
* <code> |
| 10 |
* <?php |
| 11 |
* include 'Crypt/RSA.php'; |
| 12 |
* |
| 13 |
* $rsa = new Crypt_RSA(); |
| 14 |
* extract($rsa->createKey()); |
| 15 |
* |
| 16 |
* $plaintext = 'terrafrost'; |
| 17 |
* |
| 18 |
* $rsa->loadKey($privatekey); |
| 19 |
* $ciphertext = $rsa->encrypt($plaintext); |
| 20 |
* |
| 21 |
* $rsa->loadKey($publickey); |
| 22 |
* echo $rsa->decrypt($ciphertext); |
| 23 |
* ?> |
| 24 |
* </code> |
| 25 |
* |
| 26 |
* Here's an example of how to create signatures and verify signatures with this library: |
| 27 |
* <code> |
| 28 |
* <?php |
| 29 |
* include 'Crypt/RSA.php'; |
| 30 |
* |
| 31 |
* $rsa = new Crypt_RSA(); |
| 32 |
* extract($rsa->createKey()); |
| 33 |
* |
| 34 |
* $plaintext = 'terrafrost'; |
| 35 |
* |
| 36 |
* $rsa->loadKey($privatekey); |
| 37 |
* $signature = $rsa->sign($plaintext); |
| 38 |
* |
| 39 |
* $rsa->loadKey($publickey); |
| 40 |
* echo $rsa->verify($plaintext, $signature) ? 'verified' : 'unverified'; |
| 41 |
* ?> |
| 42 |
* </code> |
| 43 |
* |
| 44 |
* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy |
| 45 |
* of this software and associated documentation files (the "Software"), to deal |
| 46 |
* in the Software without restriction, including without limitation the rights |
| 47 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 48 |
* copies of the Software, and to permit persons to whom the Software is |
| 49 |
* furnished to do so, subject to the following conditions: |
| 50 |
* |
| 51 |
* The above copyright notice and this permission notice shall be included in |
| 52 |
* all copies or substantial portions of the Software. |
| 53 |
* |
| 54 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 55 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 56 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 57 |
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 58 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 59 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 60 |
* THE SOFTWARE. |
| 61 |
* |
| 62 |
* @category Crypt |
| 63 |
* @package Crypt_RSA |
| 64 |
* @author Jim Wigginton <[email protected]> |
| 65 |
* @copyright 2009 Jim Wigginton |
| 66 |
* @license http://www.opensource.org/licenses/mit-license.html MIT License |
| 67 |
* @link http://phpseclib.sourceforge.net |
| 68 |
*/ |
| 69 |
|
| 70 |
/** |
| 71 |
* Include Crypt_Random |
| 72 |
*/ |
| 73 |
// the class_exists() will only be called if the crypt_random_string function hasn't been defined and |
| 74 |
// will trigger a call to __autoload() if you're wanting to auto-load classes |
| 75 |
// call function_exists() a second time to stop the include_once from being called outside |
| 76 |
// of the auto loader |
| 77 |
if (!function_exists('crypt_random_string')) { |
| 78 |
include_once 'Random.php'; |
| 79 |
} |
| 80 |
|
| 81 |
/** |
| 82 |
* Include Crypt_Hash |
| 83 |
*/ |
| 84 |
if (!class_exists('Crypt_Hash')) { |
| 85 |
include_once 'Hash.php'; |
| 86 |
} |
| 87 |
|
| 88 |
/**#@+ |
| 89 |
* @access public |
| 90 |
* @see self::encrypt() |
| 91 |
* @see self::decrypt() |
| 92 |
*/ |
| 93 |
/** |
| 94 |
* Use {@link http://en.wikipedia.org/wiki/Optimal_Asymmetric_Encryption_Padding Optimal Asymmetric Encryption Padding} |
| 95 |
* (OAEP) for encryption / decryption. |
| 96 |
* |
| 97 |
* Uses sha1 by default. |
| 98 |
* |
| 99 |
* @see self::setHash() |
| 100 |
* @see self::setMGFHash() |
| 101 |
*/ |
| 102 |
define('CRYPT_RSA_ENCRYPTION_OAEP', 1); |
| 103 |
/** |
| 104 |
* Use PKCS#1 padding. |
| 105 |
* |
| 106 |
* Although CRYPT_RSA_ENCRYPTION_OAEP offers more security, including PKCS#1 padding is necessary for purposes of backwards |
| 107 |
* compatibility with protocols (like SSH-1) written before OAEP's introduction. |
| 108 |
*/ |
| 109 |
define('CRYPT_RSA_ENCRYPTION_PKCS1', 2); |
| 110 |
/** |
| 111 |
* Do not use any padding |
| 112 |
* |
| 113 |
* Although this method is not recommended it can none-the-less sometimes be useful if you're trying to decrypt some legacy |
| 114 |
* stuff, if you're trying to diagnose why an encrypted message isn't decrypting, etc. |
| 115 |
*/ |
| 116 |
define('CRYPT_RSA_ENCRYPTION_NONE', 3); |
| 117 |
/**#@-*/ |
| 118 |
|
| 119 |
/**#@+ |
| 120 |
* @access public |
| 121 |
* @see self::sign() |
| 122 |
* @see self::verify() |
| 123 |
* @see self::setHash() |
| 124 |
*/ |
| 125 |
/** |
| 126 |
* Use the Probabilistic Signature Scheme for signing |
| 127 |
* |
| 128 |
* Uses sha1 by default. |
| 129 |
* |
| 130 |
* @see self::setSaltLength() |
| 131 |
* @see self::setMGFHash() |
| 132 |
*/ |
| 133 |
define('CRYPT_RSA_SIGNATURE_PSS', 1); |
| 134 |
/** |
| 135 |
* Use the PKCS#1 scheme by default. |
| 136 |
* |
| 137 |
* Although CRYPT_RSA_SIGNATURE_PSS offers more security, including PKCS#1 signing is necessary for purposes of backwards |
| 138 |
* compatibility with protocols (like SSH-2) written before PSS's introduction. |
| 139 |
*/ |
| 140 |
define('CRYPT_RSA_SIGNATURE_PKCS1', 2); |
| 141 |
/**#@-*/ |
| 142 |
|
| 143 |
/**#@+ |
| 144 |
* @access private |
| 145 |
* @see self::createKey() |
| 146 |
*/ |
| 147 |
/** |
| 148 |
* ASN1 Integer |
| 149 |
*/ |
| 150 |
define('CRYPT_RSA_ASN1_INTEGER', 2); |
| 151 |
/** |
| 152 |
* ASN1 Bit String |
| 153 |
*/ |
| 154 |
define('CRYPT_RSA_ASN1_BITSTRING', 3); |
| 155 |
/** |
| 156 |
* ASN1 Octet String |
| 157 |
*/ |
| 158 |
define('CRYPT_RSA_ASN1_OCTETSTRING', 4); |
| 159 |
/** |
| 160 |
* ASN1 Object Identifier |
| 161 |
*/ |
| 162 |
define('CRYPT_RSA_ASN1_OBJECT', 6); |
| 163 |
/** |
| 164 |
* ASN1 Sequence (with the constucted bit set) |
| 165 |
*/ |
| 166 |
define('CRYPT_RSA_ASN1_SEQUENCE', 48); |
| 167 |
/**#@-*/ |
| 168 |
|
| 169 |
/**#@+ |
| 170 |
* @access private |
| 171 |
* @see self::Crypt_RSA() |
| 172 |
*/ |
| 173 |
/** |
| 174 |
* To use the pure-PHP implementation |
| 175 |
*/ |
| 176 |
define('CRYPT_RSA_MODE_INTERNAL', 1); |
| 177 |
/** |
| 178 |
* To use the OpenSSL library |
| 179 |
* |
| 180 |
* (if enabled; otherwise, the internal implementation will be used) |
| 181 |
*/ |
| 182 |
define('CRYPT_RSA_MODE_OPENSSL', 2); |
| 183 |
/**#@-*/ |
| 184 |
|
| 185 |
/** |
| 186 |
* Default openSSL configuration file. |
| 187 |
*/ |
| 188 |
define('CRYPT_RSA_OPENSSL_CONFIG', dirname(__FILE__) . '/../openssl.cnf'); |
| 189 |
|
| 190 |
/**#@+ |
| 191 |
* @access public |
| 192 |
* @see self::createKey() |
| 193 |
* @see self::setPrivateKeyFormat() |
| 194 |
*/ |
| 195 |
/** |
| 196 |
* PKCS#1 formatted private key |
| 197 |
* |
| 198 |
* Used by OpenSSH |
| 199 |
*/ |
| 200 |
define('CRYPT_RSA_PRIVATE_FORMAT_PKCS1', 0); |
| 201 |
/** |
| 202 |
* PuTTY formatted private key |
| 203 |
*/ |
| 204 |
define('CRYPT_RSA_PRIVATE_FORMAT_PUTTY', 1); |
| 205 |
/** |
| 206 |
* XML formatted private key |
| 207 |
*/ |
| 208 |
define('CRYPT_RSA_PRIVATE_FORMAT_XML', 2); |
| 209 |
/** |
| 210 |
* PKCS#8 formatted private key |
| 211 |
*/ |
| 212 |
define('CRYPT_RSA_PRIVATE_FORMAT_PKCS8', 8); |
| 213 |
/** |
| 214 |
* OpenSSH formatted private key |
| 215 |
*/ |
| 216 |
define('CRYPT_RSA_PRIVATE_FORMAT_OPENSSH', 9); |
| 217 |
/**#@-*/ |
| 218 |
|
| 219 |
/**#@+ |
| 220 |
* @access public |
| 221 |
* @see self::createKey() |
| 222 |
* @see self::setPublicKeyFormat() |
| 223 |
*/ |
| 224 |
/** |
| 225 |
* Raw public key |
| 226 |
* |
| 227 |
* An array containing two Math_BigInteger objects. |
| 228 |
* |
| 229 |
* The exponent can be indexed with any of the following: |
| 230 |
* |
| 231 |
* 0, e, exponent, publicExponent |
| 232 |
* |
| 233 |
* The modulus can be indexed with any of the following: |
| 234 |
* |
| 235 |
* 1, n, modulo, modulus |
| 236 |
*/ |
| 237 |
define('CRYPT_RSA_PUBLIC_FORMAT_RAW', 3); |
| 238 |
/** |
| 239 |
* PKCS#1 formatted public key (raw) |
| 240 |
* |
| 241 |
* Used by File/X509.php |
| 242 |
* |
| 243 |
* Has the following header: |
| 244 |
* |
| 245 |
* -----BEGIN RSA PUBLIC KEY----- |
| 246 |
* |
| 247 |
* Analogous to ssh-keygen's pem format (as specified by -m) |
| 248 |
*/ |
| 249 |
define('CRYPT_RSA_PUBLIC_FORMAT_PKCS1', 4); |
| 250 |
define('CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW', 4); |
| 251 |
/** |
| 252 |
* XML formatted public key |
| 253 |
*/ |
| 254 |
define('CRYPT_RSA_PUBLIC_FORMAT_XML', 5); |
| 255 |
/** |
| 256 |
* OpenSSH formatted public key |
| 257 |
* |
| 258 |
* Place in $HOME/.ssh/authorized_keys |
| 259 |
*/ |
| 260 |
define('CRYPT_RSA_PUBLIC_FORMAT_OPENSSH', 6); |
| 261 |
/** |
| 262 |
* PKCS#1 formatted public key (encapsulated) |
| 263 |
* |
| 264 |
* Used by PHP's openssl_public_encrypt() and openssl's rsautl (when -pubin is set) |
| 265 |
* |
| 266 |
* Has the following header: |
| 267 |
* |
| 268 |
* -----BEGIN PUBLIC KEY----- |
| 269 |
* |
| 270 |
* Analogous to ssh-keygen's pkcs8 format (as specified by -m). Although PKCS8 |
| 271 |
* is specific to private keys it's basically creating a DER-encoded wrapper |
| 272 |
* for keys. This just extends that same concept to public keys (much like ssh-keygen) |
| 273 |
*/ |
| 274 |
define('CRYPT_RSA_PUBLIC_FORMAT_PKCS8', 7); |
| 275 |
/**#@-*/ |
| 276 |
|
| 277 |
/** |
| 278 |
* Pure-PHP PKCS#1 compliant implementation of RSA. |
| 279 |
* |
| 280 |
* @package Crypt_RSA |
| 281 |
* @author Jim Wigginton <[email protected]> |
| 282 |
* @access public |
| 283 |
*/ |
| 284 |
class Crypt_RSA |
| 285 |
{ |
| 286 |
/** |
| 287 |
* Precomputed Zero |
| 288 |
* |
| 289 |
* @var Math_BigInteger |
| 290 |
* @access private |
| 291 |
*/ |
| 292 |
var $zero; |
| 293 |
|
| 294 |
/** |
| 295 |
* Precomputed One |
| 296 |
* |
| 297 |
* @var Math_BigInteger |
| 298 |
* @access private |
| 299 |
*/ |
| 300 |
var $one; |
| 301 |
|
| 302 |
/** |
| 303 |
* Private Key Format |
| 304 |
* |
| 305 |
* @var int |
| 306 |
* @access private |
| 307 |
*/ |
| 308 |
var $privateKeyFormat = CRYPT_RSA_PRIVATE_FORMAT_PKCS1; |
| 309 |
|
| 310 |
/** |
| 311 |
* Public Key Format |
| 312 |
* |
| 313 |
* @var int |
| 314 |
* @access public |
| 315 |
*/ |
| 316 |
var $publicKeyFormat = CRYPT_RSA_PUBLIC_FORMAT_PKCS8; |
| 317 |
|
| 318 |
/** |
| 319 |
* Modulus (ie. n) |
| 320 |
* |
| 321 |
* @var Math_BigInteger |
| 322 |
* @access private |
| 323 |
*/ |
| 324 |
var $modulus; |
| 325 |
|
| 326 |
/** |
| 327 |
* Modulus length |
| 328 |
* |
| 329 |
* @var Math_BigInteger |
| 330 |
* @access private |
| 331 |
*/ |
| 332 |
var $k; |
| 333 |
|
| 334 |
/** |
| 335 |
* Exponent (ie. e or d) |
| 336 |
* |
| 337 |
* @var Math_BigInteger |
| 338 |
* @access private |
| 339 |
*/ |
| 340 |
var $exponent; |
| 341 |
|
| 342 |
/** |
| 343 |
* Primes for Chinese Remainder Theorem (ie. p and q) |
| 344 |
* |
| 345 |
* @var array |
| 346 |
* @access private |
| 347 |
*/ |
| 348 |
var $primes; |
| 349 |
|
| 350 |
/** |
| 351 |
* Exponents for Chinese Remainder Theorem (ie. dP and dQ) |
| 352 |
* |
| 353 |
* @var array |
| 354 |
* @access private |
| 355 |
*/ |
| 356 |
var $exponents; |
| 357 |
|
| 358 |
/** |
| 359 |
* Coefficients for Chinese Remainder Theorem (ie. qInv) |
| 360 |
* |
| 361 |
* @var array |
| 362 |
* @access private |
| 363 |
*/ |
| 364 |
var $coefficients; |
| 365 |
|
| 366 |
/** |
| 367 |
* Hash name |
| 368 |
* |
| 369 |
* @var string |
| 370 |
* @access private |
| 371 |
*/ |
| 372 |
var $hashName; |
| 373 |
|
| 374 |
/** |
| 375 |
* Hash function |
| 376 |
* |
| 377 |
* @var Crypt_Hash |
| 378 |
* @access private |
| 379 |
*/ |
| 380 |
var $hash; |
| 381 |
|
| 382 |
/** |
| 383 |
* Length of hash function output |
| 384 |
* |
| 385 |
* @var int |
| 386 |
* @access private |
| 387 |
*/ |
| 388 |
var $hLen; |
| 389 |
|
| 390 |
/** |
| 391 |
* Length of salt |
| 392 |
* |
| 393 |
* @var int |
| 394 |
* @access private |
| 395 |
*/ |
| 396 |
var $sLen; |
| 397 |
|
| 398 |
/** |
| 399 |
* Hash function for the Mask Generation Function |
| 400 |
* |
| 401 |
* @var Crypt_Hash |
| 402 |
* @access private |
| 403 |
*/ |
| 404 |
var $mgfHash; |
| 405 |
|
| 406 |
/** |
| 407 |
* Length of MGF hash function output |
| 408 |
* |
| 409 |
* @var int |
| 410 |
* @access private |
| 411 |
*/ |
| 412 |
var $mgfHLen; |
| 413 |
|
| 414 |
/** |
| 415 |
* Encryption mode |
| 416 |
* |
| 417 |
* @var int |
| 418 |
* @access private |
| 419 |
*/ |
| 420 |
var $encryptionMode = CRYPT_RSA_ENCRYPTION_OAEP; |
| 421 |
|
| 422 |
/** |
| 423 |
* Signature mode |
| 424 |
* |
| 425 |
* @var int |
| 426 |
* @access private |
| 427 |
*/ |
| 428 |
var $signatureMode = CRYPT_RSA_SIGNATURE_PSS; |
| 429 |
|
| 430 |
/** |
| 431 |
* Public Exponent |
| 432 |
* |
| 433 |
* @var mixed |
| 434 |
* @access private |
| 435 |
*/ |
| 436 |
var $publicExponent = false; |
| 437 |
|
| 438 |
/** |
| 439 |
* Password |
| 440 |
* |
| 441 |
* @var string |
| 442 |
* @access private |
| 443 |
*/ |
| 444 |
var $password = false; |
| 445 |
|
| 446 |
/** |
| 447 |
* Components |
| 448 |
* |
| 449 |
* For use with parsing XML formatted keys. PHP's XML Parser functions use utilized - instead of PHP's DOM functions - |
| 450 |
* because PHP's XML Parser functions work on PHP4 whereas PHP's DOM functions - although surperior - don't. |
| 451 |
* |
| 452 |
* @see self::_start_element_handler() |
| 453 |
* @var array |
| 454 |
* @access private |
| 455 |
*/ |
| 456 |
var $components = array(); |
| 457 |
|
| 458 |
/** |
| 459 |
* Current String |
| 460 |
* |
| 461 |
* For use with parsing XML formatted keys. |
| 462 |
* |
| 463 |
* @see self::_character_handler() |
| 464 |
* @see self::_stop_element_handler() |
| 465 |
* @var mixed |
| 466 |
* @access private |
| 467 |
*/ |
| 468 |
var $current; |
| 469 |
|
| 470 |
/** |
| 471 |
* OpenSSL configuration file name. |
| 472 |
* |
| 473 |
* Set to null to use system configuration file. |
| 474 |
* @see self::createKey() |
| 475 |
* @var mixed |
| 476 |
* @Access public |
| 477 |
*/ |
| 478 |
var $configFile; |
| 479 |
|
| 480 |
/** |
| 481 |
* Public key comment field. |
| 482 |
* |
| 483 |
* @var string |
| 484 |
* @access private |
| 485 |
*/ |
| 486 |
var $comment = 'phpseclib-generated-key'; |
| 487 |
|
| 488 |
/** |
| 489 |
* The constructor |
| 490 |
* |
| 491 |
* If you want to make use of the openssl extension, you'll need to set the mode manually, yourself. The reason |
| 492 |
* Crypt_RSA doesn't do it is because OpenSSL doesn't fail gracefully. openssl_pkey_new(), in particular, requires |
| 493 |
* openssl.cnf be present somewhere and, unfortunately, the only real way to find out is too late. |
| 494 |
* |
| 495 |
* @return Crypt_RSA |
| 496 |
* @access public |
| 497 |
*/ |
| 498 |
function __construct() |
| 499 |
{ |
| 500 |
if (!class_exists('Math_BigInteger')) { |
| 501 |
include_once 'Math/BigInteger.php'; |
| 502 |
} |
| 503 |
|
| 504 |
$this->configFile = CRYPT_RSA_OPENSSL_CONFIG; |
| 505 |
|
| 506 |
if (!defined('CRYPT_RSA_MODE')) { |
| 507 |
switch (true) { |
| 508 |
// Math/BigInteger's openssl requirements are a little less stringent than Crypt/RSA's. in particular, |
| 509 |
// Math/BigInteger doesn't require an openssl.cfg file whereas Crypt/RSA does. so if Math/BigInteger |
| 510 |
// can't use OpenSSL it can be pretty trivially assumed, then, that Crypt/RSA can't either. |
| 511 |
case defined('MATH_BIGINTEGER_OPENSSL_DISABLE'): |
| 512 |
define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_INTERNAL); |
| 513 |
break; |
| 514 |
// openssl_pkey_get_details - which is used in the only place Crypt/RSA.php uses OpenSSL - was introduced in PHP 5.2.0 |
| 515 |
case !function_exists('openssl_pkey_get_details'): |
| 516 |
define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_INTERNAL); |
| 517 |
break; |
| 518 |
case function_exists('phpinfo') && extension_loaded('openssl') && version_compare(PHP_VERSION, '4.2.0', '>=') && file_exists($this->configFile): |
| 519 |
// some versions of XAMPP have mismatched versions of OpenSSL which causes it not to work |
| 520 |
ob_start(); |
| 521 |
@phpinfo(); |
| 522 |
$content = ob_get_contents(); |
| 523 |
ob_end_clean(); |
| 524 |
|
| 525 |
preg_match_all('#OpenSSL (Header|Library) Version(.*)#im', $content, $matches); |
| 526 |
|
| 527 |
$versions = array(); |
| 528 |
if (!empty($matches[1])) { |
| 529 |
for ($i = 0; $i < count($matches[1]); $i++) { |
| 530 |
$fullVersion = trim(str_replace('=>', '', strip_tags($matches[2][$i]))); |
| 531 |
|
| 532 |
// Remove letter part in OpenSSL version |
| 533 |
if (!preg_match('/(\d+\.\d+\.\d+)/i', $fullVersion, $m)) { |
| 534 |
$versions[$matches[1][$i]] = $fullVersion; |
| 535 |
} else { |
| 536 |
$versions[$matches[1][$i]] = $m[0]; |
| 537 |
} |
| 538 |
} |
| 539 |
} |
| 540 |
|
| 541 |
// it doesn't appear that OpenSSL versions were reported upon until PHP 5.3+ |
| 542 |
switch (true) { |
| 543 |
case !isset($versions['Header']): |
| 544 |
case !isset($versions['Library']): |
| 545 |
case $versions['Header'] == $versions['Library']: |
| 546 |
case version_compare($versions['Header'], '1.0.0') >= 0 && version_compare($versions['Library'], '1.0.0') >= 0: |
| 547 |
define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_OPENSSL); |
| 548 |
break; |
| 549 |
default: |
| 550 |
define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_INTERNAL); |
| 551 |
define('MATH_BIGINTEGER_OPENSSL_DISABLE', true); |
| 552 |
} |
| 553 |
break; |
| 554 |
default: |
| 555 |
define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_INTERNAL); |
| 556 |
} |
| 557 |
} |
| 558 |
|
| 559 |
$this->zero = new Math_BigInteger(); |
| 560 |
$this->one = new Math_BigInteger(1); |
| 561 |
|
| 562 |
$this->hash = new Crypt_Hash('sha1'); |
| 563 |
$this->hLen = $this->hash->getLength(); |
| 564 |
$this->hashName = 'sha1'; |
| 565 |
$this->mgfHash = new Crypt_Hash('sha1'); |
| 566 |
$this->mgfHLen = $this->mgfHash->getLength(); |
| 567 |
} |
| 568 |
|
| 569 |
/** |
| 570 |
* PHP4 compatible Default Constructor. |
| 571 |
* |
| 572 |
* @see self::__construct() |
| 573 |
* @access public |
| 574 |
*/ |
| 575 |
function Crypt_RSA() |
| 576 |
{ |
| 577 |
$this->__construct(); |
| 578 |
} |
| 579 |
|
| 580 |
/** |
| 581 |
* Create public / private key pair |
| 582 |
* |
| 583 |
* Returns an array with the following three elements: |
| 584 |
* - 'privatekey': The private key. |
| 585 |
* - 'publickey': The public key. |
| 586 |
* - 'partialkey': A partially computed key (if the execution time exceeded $timeout). |
| 587 |
* Will need to be passed back to Crypt_RSA::createKey() as the third parameter for further processing. |
| 588 |
* |
| 589 |
* @access public |
| 590 |
* @param int $bits |
| 591 |
* @param int $timeout |
| 592 |
* @param array $partial |
| 593 |
*/ |
| 594 |
function createKey($bits = 1024, $timeout = false, $partial = array()) |
| 595 |
{ |
| 596 |
if (!defined('CRYPT_RSA_EXPONENT')) { |
| 597 |
// http://en.wikipedia.org/wiki/65537_%28number%29 |
| 598 |
define('CRYPT_RSA_EXPONENT', '65537'); |
| 599 |
} |
| 600 |
// per <http://cseweb.ucsd.edu/~hovav/dist/survey.pdf#page=5>, this number ought not result in primes smaller |
| 601 |
// than 256 bits. as a consequence if the key you're trying to create is 1024 bits and you've set CRYPT_RSA_SMALLEST_PRIME |
| 602 |
// to 384 bits then you're going to get a 384 bit prime and a 640 bit prime (384 + 1024 % 384). at least if |
| 603 |
// CRYPT_RSA_MODE is set to CRYPT_RSA_MODE_INTERNAL. if CRYPT_RSA_MODE is set to CRYPT_RSA_MODE_OPENSSL then |
| 604 |
// CRYPT_RSA_SMALLEST_PRIME is ignored (ie. multi-prime RSA support is more intended as a way to speed up RSA key |
| 605 |
// generation when there's a chance neither gmp nor OpenSSL are installed) |
| 606 |
if (!defined('CRYPT_RSA_SMALLEST_PRIME')) { |
| 607 |
define('CRYPT_RSA_SMALLEST_PRIME', 4096); |
| 608 |
} |
| 609 |
|
| 610 |
// OpenSSL uses 65537 as the exponent and requires RSA keys be 384 bits minimum |
| 611 |
if (CRYPT_RSA_MODE == CRYPT_RSA_MODE_OPENSSL && $bits >= 384 && CRYPT_RSA_EXPONENT == 65537) { |
| 612 |
$config = array(); |
| 613 |
if (isset($this->configFile)) { |
| 614 |
$config['config'] = $this->configFile; |
| 615 |
} |
| 616 |
$rsa = openssl_pkey_new(array('private_key_bits' => $bits) + $config); |
| 617 |
openssl_pkey_export($rsa, $privatekey, null, $config); |
| 618 |
$publickey = openssl_pkey_get_details($rsa); |
| 619 |
$publickey = $publickey['key']; |
| 620 |
|
| 621 |
$privatekey = call_user_func_array(array($this, '_convertPrivateKey'), array_values($this->_parseKey($privatekey, CRYPT_RSA_PRIVATE_FORMAT_PKCS1))); |
| 622 |
$publickey = call_user_func_array(array($this, '_convertPublicKey'), array_values($this->_parseKey($publickey, CRYPT_RSA_PUBLIC_FORMAT_PKCS1))); |
| 623 |
|
| 624 |
// clear the buffer of error strings stemming from a minimalistic openssl.cnf |
| 625 |
// https://github.com/php/php-src/issues/11054 talks about other errors this'll pick up |
| 626 |
while (openssl_error_string() !== false) { |
| 627 |
} |
| 628 |
|
| 629 |
return array( |
| 630 |
'privatekey' => $privatekey, |
| 631 |
'publickey' => $publickey, |
| 632 |
'partialkey' => false |
| 633 |
); |
| 634 |
} |
| 635 |
|
| 636 |
static $e; |
| 637 |
if (!isset($e)) { |
| 638 |
$e = new Math_BigInteger(CRYPT_RSA_EXPONENT); |
| 639 |
} |
| 640 |
|
| 641 |
extract($this->_generateMinMax($bits)); |
| 642 |
$absoluteMin = $min; |
| 643 |
$temp = $bits >> 1; // divide by two to see how many bits P and Q would be |
| 644 |
if ($temp > CRYPT_RSA_SMALLEST_PRIME) { |
| 645 |
$num_primes = floor($bits / CRYPT_RSA_SMALLEST_PRIME); |
| 646 |
$temp = CRYPT_RSA_SMALLEST_PRIME; |
| 647 |
} else { |
| 648 |
$num_primes = 2; |
| 649 |
} |
| 650 |
extract($this->_generateMinMax($temp + $bits % $temp)); |
| 651 |
$finalMax = $max; |
| 652 |
extract($this->_generateMinMax($temp)); |
| 653 |
|
| 654 |
$generator = new Math_BigInteger(); |
| 655 |
|
| 656 |
$n = $this->one->copy(); |
| 657 |
if (!empty($partial)) { |
| 658 |
extract(unserialize($partial)); |
| 659 |
} else { |
| 660 |
$exponents = $coefficients = $primes = array(); |
| 661 |
$lcm = array( |
| 662 |
'top' => $this->one->copy(), |
| 663 |
'bottom' => false |
| 664 |
); |
| 665 |
} |
| 666 |
|
| 667 |
$start = time(); |
| 668 |
$i0 = count($primes) + 1; |
| 669 |
|
| 670 |
do { |
| 671 |
for ($i = $i0; $i <= $num_primes; $i++) { |
| 672 |
if ($timeout !== false) { |
| 673 |
$timeout-= time() - $start; |
| 674 |
$start = time(); |
| 675 |
if ($timeout <= 0) { |
| 676 |
return array( |
| 677 |
'privatekey' => '', |
| 678 |
'publickey' => '', |
| 679 |
'partialkey' => serialize(array( |
| 680 |
'primes' => $primes, |
| 681 |
'coefficients' => $coefficients, |
| 682 |
'lcm' => $lcm, |
| 683 |
'exponents' => $exponents |
| 684 |
)) |
| 685 |
); |
| 686 |
} |
| 687 |
} |
| 688 |
|
| 689 |
if ($i == $num_primes) { |
| 690 |
list($min, $temp) = $absoluteMin->divide($n); |
| 691 |
if (!$temp->equals($this->zero)) { |
| 692 |
$min = $min->add($this->one); // ie. ceil() |
| 693 |
} |
| 694 |
$primes[$i] = $generator->randomPrime($min, $finalMax, $timeout); |
| 695 |
} else { |
| 696 |
$primes[$i] = $generator->randomPrime($min, $max, $timeout); |
| 697 |
} |
| 698 |
|
| 699 |
if ($primes[$i] === false) { // if we've reached the timeout |
| 700 |
if (count($primes) > 1) { |
| 701 |
$partialkey = ''; |
| 702 |
} else { |
| 703 |
array_pop($primes); |
| 704 |
$partialkey = serialize(array( |
| 705 |
'primes' => $primes, |
| 706 |
'coefficients' => $coefficients, |
| 707 |
'lcm' => $lcm, |
| 708 |
'exponents' => $exponents |
| 709 |
)); |
| 710 |
} |
| 711 |
|
| 712 |
return array( |
| 713 |
'privatekey' => '', |
| 714 |
'publickey' => '', |
| 715 |
'partialkey' => $partialkey |
| 716 |
); |
| 717 |
} |
| 718 |
|
| 719 |
// the first coefficient is calculated differently from the rest |
| 720 |
// ie. instead of being $primes[1]->modInverse($primes[2]), it's $primes[2]->modInverse($primes[1]) |
| 721 |
if ($i > 2) { |
| 722 |
$coefficients[$i] = $n->modInverse($primes[$i]); |
| 723 |
} |
| 724 |
|
| 725 |
$n = $n->multiply($primes[$i]); |
| 726 |
|
| 727 |
$temp = $primes[$i]->subtract($this->one); |
| 728 |
|
| 729 |
// textbook RSA implementations use Euler's totient function instead of the least common multiple. |
| 730 |
// see http://en.wikipedia.org/wiki/Euler%27s_totient_function |
| 731 |
$lcm['top'] = $lcm['top']->multiply($temp); |
| 732 |
$lcm['bottom'] = $lcm['bottom'] === false ? $temp : $lcm['bottom']->gcd($temp); |
| 733 |
|
| 734 |
$exponents[$i] = $e->modInverse($temp); |
| 735 |
} |
| 736 |
|
| 737 |
list($temp) = $lcm['top']->divide($lcm['bottom']); |
| 738 |
$gcd = $temp->gcd($e); |
| 739 |
$i0 = 1; |
| 740 |
} while (!$gcd->equals($this->one)); |
| 741 |
|
| 742 |
$d = $e->modInverse($temp); |
| 743 |
|
| 744 |
$coefficients[2] = $primes[2]->modInverse($primes[1]); |
| 745 |
|
| 746 |
// from <http://tools.ietf.org/html/rfc3447#appendix-A.1.2>: |
| 747 |
// RSAPrivateKey ::= SEQUENCE { |
| 748 |
// version Version, |
| 749 |
// modulus INTEGER, -- n |
| 750 |
// publicExponent INTEGER, -- e |
| 751 |
// privateExponent INTEGER, -- d |
| 752 |
// prime1 INTEGER, -- p |
| 753 |
// prime2 INTEGER, -- q |
| 754 |
// exponent1 INTEGER, -- d mod (p-1) |
| 755 |
// exponent2 INTEGER, -- d mod (q-1) |
| 756 |
// coefficient INTEGER, -- (inverse of q) mod p |
| 757 |
// otherPrimeInfos OtherPrimeInfos OPTIONAL |
| 758 |
// } |
| 759 |
|
| 760 |
return array( |
| 761 |
'privatekey' => $this->_convertPrivateKey($n, $e, $d, $primes, $exponents, $coefficients), |
| 762 |
'publickey' => $this->_convertPublicKey($n, $e), |
| 763 |
'partialkey' => false |
| 764 |
); |
| 765 |
} |
| 766 |
|
| 767 |
/** |
| 768 |
* Convert a private key to the appropriate format. |
| 769 |
* |
| 770 |
* @access private |
| 771 |
* @see self::setPrivateKeyFormat() |
| 772 |
* @param Math_BigInteger $n |
| 773 |
* @param Math_BigInteger $e |
| 774 |
* @param Math_BigInteger $d |
| 775 |
* @param array<int,Math_BigInteger> $primes |
| 776 |
* @param array<int,Math_BigInteger> $exponents |
| 777 |
* @param array<int,Math_BigInteger> $coefficients |
| 778 |
* @return string |
| 779 |
*/ |
| 780 |
function _convertPrivateKey($n, $e, $d, $primes, $exponents, $coefficients) |
| 781 |
{ |
| 782 |
$signed = $this->privateKeyFormat != CRYPT_RSA_PRIVATE_FORMAT_XML; |
| 783 |
$num_primes = count($primes); |
| 784 |
$raw = array( |
| 785 |
'version' => $num_primes == 2 ? chr(0) : chr(1), // two-prime vs. multi |
| 786 |
'modulus' => $n->toBytes($signed), |
| 787 |
'publicExponent' => $e->toBytes($signed), |
| 788 |
'privateExponent' => $d->toBytes($signed), |
| 789 |
'prime1' => $primes[1]->toBytes($signed), |
| 790 |
'prime2' => $primes[2]->toBytes($signed), |
| 791 |
'exponent1' => $exponents[1]->toBytes($signed), |
| 792 |
'exponent2' => $exponents[2]->toBytes($signed), |
| 793 |
'coefficient' => $coefficients[2]->toBytes($signed) |
| 794 |
); |
| 795 |
|
| 796 |
// if the format in question does not support multi-prime rsa and multi-prime rsa was used, |
| 797 |
// call _convertPublicKey() instead. |
| 798 |
switch ($this->privateKeyFormat) { |
| 799 |
case CRYPT_RSA_PRIVATE_FORMAT_XML: |
| 800 |
if ($num_primes != 2) { |
| 801 |
return false; |
| 802 |
} |
| 803 |
return "<RSAKeyValue>\r\n" . |
| 804 |
' <Modulus>' . base64_encode($raw['modulus']) . "</Modulus>\r\n" . |
| 805 |
' <Exponent>' . base64_encode($raw['publicExponent']) . "</Exponent>\r\n" . |
| 806 |
' <P>' . base64_encode($raw['prime1']) . "</P>\r\n" . |
| 807 |
' <Q>' . base64_encode($raw['prime2']) . "</Q>\r\n" . |
| 808 |
' <DP>' . base64_encode($raw['exponent1']) . "</DP>\r\n" . |
| 809 |
' <DQ>' . base64_encode($raw['exponent2']) . "</DQ>\r\n" . |
| 810 |
' <InverseQ>' . base64_encode($raw['coefficient']) . "</InverseQ>\r\n" . |
| 811 |
' <D>' . base64_encode($raw['privateExponent']) . "</D>\r\n" . |
| 812 |
'</RSAKeyValue>'; |
| 813 |
break; |
| 814 |
case CRYPT_RSA_PRIVATE_FORMAT_PUTTY: |
| 815 |
if ($num_primes != 2) { |
| 816 |
return false; |
| 817 |
} |
| 818 |
$key = "PuTTY-User-Key-File-2: ssh-rsa\r\nEncryption: "; |
| 819 |
$encryption = (!empty($this->password) || is_string($this->password)) ? 'aes256-cbc' : 'none'; |
| 820 |
$key.= $encryption; |
| 821 |
$key.= "\r\nComment: " . $this->comment . "\r\n"; |
| 822 |
$public = pack( |
| 823 |
'Na*Na*Na*', |
| 824 |
strlen('ssh-rsa'), |
| 825 |
'ssh-rsa', |
| 826 |
strlen($raw['publicExponent']), |
| 827 |
$raw['publicExponent'], |
| 828 |
strlen($raw['modulus']), |
| 829 |
$raw['modulus'] |
| 830 |
); |
| 831 |
$source = pack( |
| 832 |
'Na*Na*Na*Na*', |
| 833 |
strlen('ssh-rsa'), |
| 834 |
'ssh-rsa', |
| 835 |
strlen($encryption), |
| 836 |
$encryption, |
| 837 |
strlen($this->comment), |
| 838 |
$this->comment, |
| 839 |
strlen($public), |
| 840 |
$public |
| 841 |
); |
| 842 |
$public = base64_encode($public); |
| 843 |
$key.= "Public-Lines: " . ((strlen($public) + 63) >> 6) . "\r\n"; |
| 844 |
$key.= chunk_split($public, 64); |
| 845 |
$private = pack( |
| 846 |
'Na*Na*Na*Na*', |
| 847 |
strlen($raw['privateExponent']), |
| 848 |
$raw['privateExponent'], |
| 849 |
strlen($raw['prime1']), |
| 850 |
$raw['prime1'], |
| 851 |
strlen($raw['prime2']), |
| 852 |
$raw['prime2'], |
| 853 |
strlen($raw['coefficient']), |
| 854 |
$raw['coefficient'] |
| 855 |
); |
| 856 |
if (empty($this->password) && !is_string($this->password)) { |
| 857 |
$source.= pack('Na*', strlen($private), $private); |
| 858 |
$hashkey = 'putty-private-key-file-mac-key'; |
| 859 |
} else { |
| 860 |
$private.= crypt_random_string(16 - (strlen($private) & 15)); |
| 861 |
$source.= pack('Na*', strlen($private), $private); |
| 862 |
if (!class_exists('Crypt_AES')) { |
| 863 |
include_once 'Crypt/AES.php'; |
| 864 |
} |
| 865 |
$sequence = 0; |
| 866 |
$symkey = ''; |
| 867 |
while (strlen($symkey) < 32) { |
| 868 |
$temp = pack('Na*', $sequence++, $this->password); |
| 869 |
$symkey.= pack('H*', sha1($temp)); |
| 870 |
} |
| 871 |
$symkey = substr($symkey, 0, 32); |
| 872 |
$crypto = new Crypt_AES(); |
| 873 |
|
| 874 |
$crypto->setKey($symkey); |
| 875 |
$crypto->disablePadding(); |
| 876 |
$private = $crypto->encrypt($private); |
| 877 |
$hashkey = 'putty-private-key-file-mac-key' . $this->password; |
| 878 |
} |
| 879 |
|
| 880 |
$private = base64_encode($private); |
| 881 |
$key.= 'Private-Lines: ' . ((strlen($private) + 63) >> 6) . "\r\n"; |
| 882 |
$key.= chunk_split($private, 64); |
| 883 |
if (!class_exists('Crypt_Hash')) { |
| 884 |
include_once 'Crypt/Hash.php'; |
| 885 |
} |
| 886 |
$hash = new Crypt_Hash('sha1'); |
| 887 |
$hash->setKey(pack('H*', sha1($hashkey))); |
| 888 |
$key.= 'Private-MAC: ' . bin2hex($hash->hash($source)) . "\r\n"; |
| 889 |
|
| 890 |
return $key; |
| 891 |
case CRYPT_RSA_PRIVATE_FORMAT_OPENSSH: |
| 892 |
if ($num_primes != 2) { |
| 893 |
return false; |
| 894 |
} |
| 895 |
$publicKey = pack('Na*Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($raw['publicExponent']), $raw['publicExponent'], strlen($raw['modulus']), $raw['modulus']); |
| 896 |
$privateKey = pack( |
| 897 |
'Na*Na*Na*Na*Na*Na*Na*', |
| 898 |
strlen('ssh-rsa'), |
| 899 |
'ssh-rsa', |
| 900 |
strlen($raw['modulus']), |
| 901 |
$raw['modulus'], |
| 902 |
strlen($raw['publicExponent']), |
| 903 |
$raw['publicExponent'], |
| 904 |
strlen($raw['privateExponent']), |
| 905 |
$raw['privateExponent'], |
| 906 |
strlen($raw['coefficient']), |
| 907 |
$raw['coefficient'], |
| 908 |
strlen($raw['prime1']), |
| 909 |
$raw['prime1'], |
| 910 |
strlen($raw['prime2']), |
| 911 |
$raw['prime2'] |
| 912 |
); |
| 913 |
$checkint = crypt_random_string(4); |
| 914 |
$paddedKey = pack( |
| 915 |
'a*Na*', |
| 916 |
$checkint . $checkint . $privateKey, |
| 917 |
strlen($this->comment), |
| 918 |
$this->comment |
| 919 |
); |
| 920 |
$paddingLength = (7 * strlen($paddedKey)) % 8; |
| 921 |
for ($i = 1; $i <= $paddingLength; $i++) { |
| 922 |
$paddedKey.= chr($i); |
| 923 |
} |
| 924 |
$key = pack( |
| 925 |
'Na*Na*Na*NNa*Na*', |
| 926 |
strlen('none'), |
| 927 |
'none', |
| 928 |
strlen('none'), |
| 929 |
'none', |
| 930 |
0, |
| 931 |
'', |
| 932 |
1, |
| 933 |
strlen($publicKey), |
| 934 |
$publicKey, |
| 935 |
strlen($paddedKey), |
| 936 |
$paddedKey |
| 937 |
); |
| 938 |
$key = "openssh-key-v1\0$key"; |
| 939 |
|
| 940 |
return "-----BEGIN OPENSSH PRIVATE KEY-----\n" . |
| 941 |
chunk_split(base64_encode($key), 70, "\n") . |
| 942 |
"-----END OPENSSH PRIVATE KEY-----\n"; |
| 943 |
default: // eg. CRYPT_RSA_PRIVATE_FORMAT_PKCS1 |
| 944 |
$components = array(); |
| 945 |
foreach ($raw as $name => $value) { |
| 946 |
$components[$name] = pack('Ca*a*', CRYPT_RSA_ASN1_INTEGER, $this->_encodeLength(strlen($value)), $value); |
| 947 |
} |
| 948 |
|
| 949 |
$RSAPrivateKey = implode('', $components); |
| 950 |
|
| 951 |
if ($num_primes > 2) { |
| 952 |
$OtherPrimeInfos = ''; |
| 953 |
for ($i = 3; $i <= $num_primes; $i++) { |
| 954 |
// OtherPrimeInfos ::= SEQUENCE SIZE(1..MAX) OF OtherPrimeInfo |
| 955 |
// |
| 956 |
// OtherPrimeInfo ::= SEQUENCE { |
| 957 |
// prime INTEGER, -- ri |
| 958 |
// exponent INTEGER, -- di |
| 959 |
// coefficient INTEGER -- ti |
| 960 |
// } |
| 961 |
$OtherPrimeInfo = pack('Ca*a*', CRYPT_RSA_ASN1_INTEGER, $this->_encodeLength(strlen($primes[$i]->toBytes(true))), $primes[$i]->toBytes(true)); |
| 962 |
$OtherPrimeInfo.= pack('Ca*a*', CRYPT_RSA_ASN1_INTEGER, $this->_encodeLength(strlen($exponents[$i]->toBytes(true))), $exponents[$i]->toBytes(true)); |
| 963 |
$OtherPrimeInfo.= pack('Ca*a*', CRYPT_RSA_ASN1_INTEGER, $this->_encodeLength(strlen($coefficients[$i]->toBytes(true))), $coefficients[$i]->toBytes(true)); |
| 964 |
$OtherPrimeInfos.= pack('Ca*a*', CRYPT_RSA_ASN1_SEQUENCE, $this->_encodeLength(strlen($OtherPrimeInfo)), $OtherPrimeInfo); |
| 965 |
} |
| 966 |
$RSAPrivateKey.= pack('Ca*a*', CRYPT_RSA_ASN1_SEQUENCE, $this->_encodeLength(strlen($OtherPrimeInfos)), $OtherPrimeInfos); |
| 967 |
} |
| 968 |
|
| 969 |
$RSAPrivateKey = pack('Ca*a*', CRYPT_RSA_ASN1_SEQUENCE, $this->_encodeLength(strlen($RSAPrivateKey)), $RSAPrivateKey); |
| 970 |
|
| 971 |
if ($this->privateKeyFormat == CRYPT_RSA_PRIVATE_FORMAT_PKCS8) { |
| 972 |
$rsaOID = pack('H*', '300d06092a864886f70d0101010500'); // hex version of MA0GCSqGSIb3DQEBAQUA |
| 973 |
$RSAPrivateKey = pack( |
| 974 |
'Ca*a*Ca*a*', |
| 975 |
CRYPT_RSA_ASN1_INTEGER, |
| 976 |
"\01\00", |
| 977 |
$rsaOID, |
| 978 |
4, |
| 979 |
$this->_encodeLength(strlen($RSAPrivateKey)), |
| 980 |
$RSAPrivateKey |
| 981 |
); |
| 982 |
$RSAPrivateKey = pack('Ca*a*', CRYPT_RSA_ASN1_SEQUENCE, $this->_encodeLength(strlen($RSAPrivateKey)), $RSAPrivateKey); |
| 983 |
if (!empty($this->password) || is_string($this->password)) { |
| 984 |
$salt = crypt_random_string(8); |
| 985 |
$iterationCount = 2048; |
| 986 |
|
| 987 |
if (!class_exists('Crypt_DES')) { |
| 988 |
include_once 'Crypt/DES.php'; |
| 989 |
} |
| 990 |
$crypto = new Crypt_DES(); |
| 991 |
$crypto->setPassword($this->password, 'pbkdf1', 'md5', $salt, $iterationCount); |
| 992 |
$RSAPrivateKey = $crypto->encrypt($RSAPrivateKey); |
| 993 |
|
| 994 |
$parameters = pack( |
| 995 |
'Ca*a*Ca*N', |
| 996 |
CRYPT_RSA_ASN1_OCTETSTRING, |
| 997 |
$this->_encodeLength(strlen($salt)), |
| 998 |
$salt, |
| 999 |
CRYPT_RSA_ASN1_INTEGER, |
| 1000 |
$this->_encodeLength(4), |
| 1001 |
$iterationCount |
| 1002 |
); |
| 1003 |
$pbeWithMD5AndDES_CBC = "\x2a\x86\x48\x86\xf7\x0d\x01\x05\x03"; |
| 1004 |
|
| 1005 |
$encryptionAlgorithm = pack( |
| 1006 |
'Ca*a*Ca*a*', |
| 1007 |
CRYPT_RSA_ASN1_OBJECT, |
| 1008 |
$this->_encodeLength(strlen($pbeWithMD5AndDES_CBC)), |
| 1009 |
$pbeWithMD5AndDES_CBC, |
| 1010 |
CRYPT_RSA_ASN1_SEQUENCE, |
| 1011 |
$this->_encodeLength(strlen($parameters)), |
| 1012 |
$parameters |
| 1013 |
); |
| 1014 |
|
| 1015 |
$RSAPrivateKey = pack( |
| 1016 |
'Ca*a*Ca*a*', |
| 1017 |
CRYPT_RSA_ASN1_SEQUENCE, |
| 1018 |
$this->_encodeLength(strlen($encryptionAlgorithm)), |
| 1019 |
$encryptionAlgorithm, |
| 1020 |
CRYPT_RSA_ASN1_OCTETSTRING, |
| 1021 |
$this->_encodeLength(strlen($RSAPrivateKey)), |
| 1022 |
$RSAPrivateKey |
| 1023 |
); |
| 1024 |
|
| 1025 |
$RSAPrivateKey = pack('Ca*a*', CRYPT_RSA_ASN1_SEQUENCE, $this->_encodeLength(strlen($RSAPrivateKey)), $RSAPrivateKey); |
| 1026 |
|
| 1027 |
$RSAPrivateKey = "-----BEGIN ENCRYPTED PRIVATE KEY-----\r\n" . |
| 1028 |
chunk_split(base64_encode($RSAPrivateKey), 64) . |
| 1029 |
'-----END ENCRYPTED PRIVATE KEY-----'; |
| 1030 |
} else { |
| 1031 |
$RSAPrivateKey = "-----BEGIN PRIVATE KEY-----\r\n" . |
| 1032 |
chunk_split(base64_encode($RSAPrivateKey), 64) . |
| 1033 |
'-----END PRIVATE KEY-----'; |
| 1034 |
} |
| 1035 |
return $RSAPrivateKey; |
| 1036 |
} |
| 1037 |
|
| 1038 |
if (!empty($this->password) || is_string($this->password)) { |
| 1039 |
$iv = crypt_random_string(8); |
| 1040 |
$symkey = pack('H*', md5($this->password . $iv)); // symkey is short for symmetric key |
| 1041 |
$symkey.= substr(pack('H*', md5($symkey . $this->password . $iv)), 0, 8); |
| 1042 |
if (!class_exists('Crypt_TripleDES')) { |
| 1043 |
include_once 'Crypt/TripleDES.php'; |
| 1044 |
} |
| 1045 |
$des = new Crypt_TripleDES(); |
| 1046 |
$des->setKey($symkey); |
| 1047 |
$des->setIV($iv); |
| 1048 |
$iv = strtoupper(bin2hex($iv)); |
| 1049 |
$RSAPrivateKey = "-----BEGIN RSA PRIVATE KEY-----\r\n" . |
| 1050 |
"Proc-Type: 4,ENCRYPTED\r\n" . |
| 1051 |
"DEK-Info: DES-EDE3-CBC,$iv\r\n" . |
| 1052 |
"\r\n" . |
| 1053 |
chunk_split(base64_encode($des->encrypt($RSAPrivateKey)), 64) . |
| 1054 |
'-----END RSA PRIVATE KEY-----'; |
| 1055 |
} else { |
| 1056 |
$RSAPrivateKey = "-----BEGIN RSA PRIVATE KEY-----\r\n" . |
| 1057 |
chunk_split(base64_encode($RSAPrivateKey), 64) . |
| 1058 |
'-----END RSA PRIVATE KEY-----'; |
| 1059 |
} |
| 1060 |
|
| 1061 |
return $RSAPrivateKey; |
| 1062 |
} |
| 1063 |
} |
| 1064 |
|
| 1065 |
/** |
| 1066 |
* Convert a public key to the appropriate format |
| 1067 |
* |
| 1068 |
* @access private |
| 1069 |
* @see self::setPublicKeyFormat() |
| 1070 |
* @param Math_BigInteger $n |
| 1071 |
* @param Math_BigInteger $e |
| 1072 |
* @return string|array<string,Math_BigInteger> |
| 1073 |
*/ |
| 1074 |
function _convertPublicKey($n, $e) |
| 1075 |
{ |
| 1076 |
$signed = $this->publicKeyFormat != CRYPT_RSA_PUBLIC_FORMAT_XML; |
| 1077 |
|
| 1078 |
$modulus = $n->toBytes($signed); |
| 1079 |
$publicExponent = $e->toBytes($signed); |
| 1080 |
|
| 1081 |
switch ($this->publicKeyFormat) { |
| 1082 |
case CRYPT_RSA_PUBLIC_FORMAT_RAW: |
| 1083 |
return array('e' => $e->copy(), 'n' => $n->copy()); |
| 1084 |
case CRYPT_RSA_PUBLIC_FORMAT_XML: |
| 1085 |
return "<RSAKeyValue>\r\n" . |
| 1086 |
' <Modulus>' . base64_encode($modulus) . "</Modulus>\r\n" . |
| 1087 |
' <Exponent>' . base64_encode($publicExponent) . "</Exponent>\r\n" . |
| 1088 |
'</RSAKeyValue>'; |
| 1089 |
break; |
| 1090 |
case CRYPT_RSA_PUBLIC_FORMAT_OPENSSH: |
| 1091 |
// from <http://tools.ietf.org/html/rfc4253#page-15>: |
| 1092 |
// string "ssh-rsa" |
| 1093 |
// mpint e |
| 1094 |
// mpint n |
| 1095 |
$RSAPublicKey = pack('Na*Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($publicExponent), $publicExponent, strlen($modulus), $modulus); |
| 1096 |
$RSAPublicKey = 'ssh-rsa ' . base64_encode($RSAPublicKey) . ' ' . $this->comment; |
| 1097 |
|
| 1098 |
return $RSAPublicKey; |
| 1099 |
default: // eg. CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW or CRYPT_RSA_PUBLIC_FORMAT_PKCS1 |
| 1100 |
// from <http://tools.ietf.org/html/rfc3447#appendix-A.1.1>: |
| 1101 |
// RSAPublicKey ::= SEQUENCE { |
| 1102 |
// modulus INTEGER, -- n |
| 1103 |
// publicExponent INTEGER -- e |
| 1104 |
// } |
| 1105 |
$components = array( |
| 1106 |
'modulus' => pack('Ca*a*', CRYPT_RSA_ASN1_INTEGER, $this->_encodeLength(strlen($modulus)), $modulus), |
| 1107 |
'publicExponent' => pack('Ca*a*', CRYPT_RSA_ASN1_INTEGER, $this->_encodeLength(strlen($publicExponent)), $publicExponent) |
| 1108 |
); |
| 1109 |
|
| 1110 |
$RSAPublicKey = pack( |
| 1111 |
'Ca*a*a*', |
| 1112 |
CRYPT_RSA_ASN1_SEQUENCE, |
| 1113 |
$this->_encodeLength(strlen($components['modulus']) + strlen($components['publicExponent'])), |
| 1114 |
$components['modulus'], |
| 1115 |
$components['publicExponent'] |
| 1116 |
); |
| 1117 |
|
| 1118 |
if ($this->publicKeyFormat == CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW) { |
| 1119 |
$RSAPublicKey = "-----BEGIN RSA PUBLIC KEY-----\r\n" . |
| 1120 |
chunk_split(base64_encode($RSAPublicKey), 64) . |
| 1121 |
'-----END RSA PUBLIC KEY-----'; |
| 1122 |
} else { |
| 1123 |
// sequence(oid(1.2.840.113549.1.1.1), null)) = rsaEncryption. |
| 1124 |
$rsaOID = pack('H*', '300d06092a864886f70d0101010500'); // hex version of MA0GCSqGSIb3DQEBAQUA |
| 1125 |
$RSAPublicKey = chr(0) . $RSAPublicKey; |
| 1126 |
$RSAPublicKey = chr(3) . $this->_encodeLength(strlen($RSAPublicKey)) . $RSAPublicKey; |
| 1127 |
|
| 1128 |
$RSAPublicKey = pack( |
| 1129 |
'Ca*a*', |
| 1130 |
CRYPT_RSA_ASN1_SEQUENCE, |
| 1131 |
$this->_encodeLength(strlen($rsaOID . $RSAPublicKey)), |
| 1132 |
$rsaOID . $RSAPublicKey |
| 1133 |
); |
| 1134 |
|
| 1135 |
$RSAPublicKey = "-----BEGIN PUBLIC KEY-----\r\n" . |
| 1136 |
chunk_split(base64_encode($RSAPublicKey), 64) . |
| 1137 |
'-----END PUBLIC KEY-----'; |
| 1138 |
} |
| 1139 |
|
| 1140 |
return $RSAPublicKey; |
| 1141 |
} |
| 1142 |
} |
| 1143 |
|
| 1144 |
/** |
| 1145 |
* Break a public or private key down into its constituant components |
| 1146 |
* |
| 1147 |
* @access private |
| 1148 |
* @see self::_convertPublicKey() |
| 1149 |
* @see self::_convertPrivateKey() |
| 1150 |
* @param string $key |
| 1151 |
* @param int $type |
| 1152 |
* @return array |
| 1153 |
*/ |
| 1154 |
function _parseKey($key, $type) |
| 1155 |
{ |
| 1156 |
if ($type != CRYPT_RSA_PUBLIC_FORMAT_RAW && !is_string($key)) { |
| 1157 |
return false; |
| 1158 |
} |
| 1159 |
|
| 1160 |
switch ($type) { |
| 1161 |
case CRYPT_RSA_PUBLIC_FORMAT_RAW: |
| 1162 |
if (!is_array($key)) { |
| 1163 |
return false; |
| 1164 |
} |
| 1165 |
$components = array(); |
| 1166 |
switch (true) { |
| 1167 |
case isset($key['e']): |
| 1168 |
$components['publicExponent'] = $key['e']->copy(); |
| 1169 |
break; |
| 1170 |
case isset($key['exponent']): |
| 1171 |
$components['publicExponent'] = $key['exponent']->copy(); |
| 1172 |
break; |
| 1173 |
case isset($key['publicExponent']): |
| 1174 |
$components['publicExponent'] = $key['publicExponent']->copy(); |
| 1175 |
break; |
| 1176 |
case isset($key[0]): |
| 1177 |
$components['publicExponent'] = $key[0]->copy(); |
| 1178 |
} |
| 1179 |
switch (true) { |
| 1180 |
case isset($key['n']): |
| 1181 |
$components['modulus'] = $key['n']->copy(); |
| 1182 |
break; |
| 1183 |
case isset($key['modulo']): |
| 1184 |
$components['modulus'] = $key['modulo']->copy(); |
| 1185 |
break; |
| 1186 |
case isset($key['modulus']): |
| 1187 |
$components['modulus'] = $key['modulus']->copy(); |
| 1188 |
break; |
| 1189 |
case isset($key[1]): |
| 1190 |
$components['modulus'] = $key[1]->copy(); |
| 1191 |
} |
| 1192 |
return isset($components['modulus']) && isset($components['publicExponent']) ? $components : false; |
| 1193 |
case CRYPT_RSA_PRIVATE_FORMAT_PKCS1: |
| 1194 |
case CRYPT_RSA_PRIVATE_FORMAT_PKCS8: |
| 1195 |
case CRYPT_RSA_PUBLIC_FORMAT_PKCS1: |
| 1196 |
/* Although PKCS#1 proposes a format that public and private keys can use, encrypting them is |
| 1197 |
"outside the scope" of PKCS#1. PKCS#1 then refers you to PKCS#12 and PKCS#15 if you're wanting to |
| 1198 |
protect private keys, however, that's not what OpenSSL* does. OpenSSL protects private keys by adding |
| 1199 |
two new "fields" to the key - DEK-Info and Proc-Type. These fields are discussed here: |
| 1200 |
|
| 1201 |
http://tools.ietf.org/html/rfc1421#section-4.6.1.1 |
| 1202 |
http://tools.ietf.org/html/rfc1421#section-4.6.1.3 |
| 1203 |
|
| 1204 |
DES-EDE3-CBC as an algorithm, however, is not discussed anywhere, near as I can tell. |
| 1205 |
DES-CBC and DES-EDE are discussed in RFC1423, however, DES-EDE3-CBC isn't, nor is its key derivation |
| 1206 |
function. As is, the definitive authority on this encoding scheme isn't the IETF but rather OpenSSL's |
| 1207 |
own implementation. ie. the implementation *is* the standard and any bugs that may exist in that |
| 1208 |
implementation are part of the standard, as well. |
| 1209 |
|
| 1210 |
* OpenSSL is the de facto standard. It's utilized by OpenSSH and other projects */ |
| 1211 |
if (preg_match('#DEK-Info: (.+),(.+)#', $key, $matches)) { |
| 1212 |
$iv = pack('H*', trim($matches[2])); |
| 1213 |
$symkey = pack('H*', md5($this->password . substr($iv, 0, 8))); // symkey is short for symmetric key |
| 1214 |
$symkey.= pack('H*', md5($symkey . $this->password . substr($iv, 0, 8))); |
| 1215 |
// remove the Proc-Type / DEK-Info sections as they're no longer needed |
| 1216 |
$key = preg_replace('#^(?:Proc-Type|DEK-Info): .*#m', '', $key); |
| 1217 |
$ciphertext = $this->_extractBER($key); |
| 1218 |
if ($ciphertext === false) { |
| 1219 |
$ciphertext = $key; |
| 1220 |
} |
| 1221 |
switch ($matches[1]) { |
| 1222 |
case 'AES-256-CBC': |
| 1223 |
if (!class_exists('Crypt_AES')) { |
| 1224 |
include_once 'Crypt/AES.php'; |
| 1225 |
} |
| 1226 |
$crypto = new Crypt_AES(); |
| 1227 |
break; |
| 1228 |
case 'AES-128-CBC': |
| 1229 |
if (!class_exists('Crypt_AES')) { |
| 1230 |
include_once 'Crypt/AES.php'; |
| 1231 |
} |
| 1232 |
$symkey = substr($symkey, 0, 16); |
| 1233 |
$crypto = new Crypt_AES(); |
| 1234 |
break; |
| 1235 |
case 'DES-EDE3-CFB': |
| 1236 |
if (!class_exists('Crypt_TripleDES')) { |
| 1237 |
include_once 'Crypt/TripleDES.php'; |
| 1238 |
} |
| 1239 |
$crypto = new Crypt_TripleDES(CRYPT_DES_MODE_CFB); |
| 1240 |
break; |
| 1241 |
case 'DES-EDE3-CBC': |
| 1242 |
if (!class_exists('Crypt_TripleDES')) { |
| 1243 |
include_once 'Crypt/TripleDES.php'; |
| 1244 |
} |
| 1245 |
$symkey = substr($symkey, 0, 24); |
| 1246 |
$crypto = new Crypt_TripleDES(); |
| 1247 |
break; |
| 1248 |
case 'DES-CBC': |
| 1249 |
if (!class_exists('Crypt_DES')) { |
| 1250 |
include_once 'Crypt/DES.php'; |
| 1251 |
} |
| 1252 |
$crypto = new Crypt_DES(); |
| 1253 |
break; |
| 1254 |
default: |
| 1255 |
return false; |
| 1256 |
} |
| 1257 |
$crypto->setKey($symkey); |
| 1258 |
$crypto->setIV($iv); |
| 1259 |
$decoded = $crypto->decrypt($ciphertext); |
| 1260 |
} else { |
| 1261 |
$decoded = $this->_extractBER($key); |
| 1262 |
} |
| 1263 |
|
| 1264 |
if ($decoded !== false) { |
| 1265 |
$key = $decoded; |
| 1266 |
} |
| 1267 |
|
| 1268 |
$components = array(); |
| 1269 |
|
| 1270 |
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_SEQUENCE) { |
| 1271 |
return false; |
| 1272 |
} |
| 1273 |
if ($this->_decodeLength($key) != strlen($key)) { |
| 1274 |
return false; |
| 1275 |
} |
| 1276 |
|
| 1277 |
$tag = ord($this->_string_shift($key)); |
| 1278 |
/* intended for keys for which OpenSSL's asn1parse returns the following: |
| 1279 |
|
| 1280 |
0:d=0 hl=4 l= 631 cons: SEQUENCE |
| 1281 |
4:d=1 hl=2 l= 1 prim: INTEGER :00 |
| 1282 |
7:d=1 hl=2 l= 13 cons: SEQUENCE |
| 1283 |
9:d=2 hl=2 l= 9 prim: OBJECT :rsaEncryption |
| 1284 |
20:d=2 hl=2 l= 0 prim: NULL |
| 1285 |
22:d=1 hl=4 l= 609 prim: OCTET STRING |
| 1286 |
|
| 1287 |
ie. PKCS8 keys*/ |
| 1288 |
|
| 1289 |
if ($tag == CRYPT_RSA_ASN1_INTEGER && substr($key, 0, 3) == "\x01\x00\x30") { |
| 1290 |
$this->_string_shift($key, 3); |
| 1291 |
$tag = CRYPT_RSA_ASN1_SEQUENCE; |
| 1292 |
} |
| 1293 |
|
| 1294 |
if ($tag == CRYPT_RSA_ASN1_SEQUENCE) { |
| 1295 |
$temp = $this->_string_shift($key, $this->_decodeLength($key)); |
| 1296 |
if (ord($this->_string_shift($temp)) != CRYPT_RSA_ASN1_OBJECT) { |
| 1297 |
return false; |
| 1298 |
} |
| 1299 |
$length = $this->_decodeLength($temp); |
| 1300 |
switch ($this->_string_shift($temp, $length)) { |
| 1301 |
case "\x2a\x86\x48\x86\xf7\x0d\x01\x01\x01": // rsaEncryption |
| 1302 |
case "\x2A\x86\x48\x86\xF7\x0D\x01\x01\x0A": // rsaPSS |
| 1303 |
break; |
| 1304 |
case "\x2a\x86\x48\x86\xf7\x0d\x01\x05\x03": // pbeWithMD5AndDES-CBC |
| 1305 |
/* |
| 1306 |
PBEParameter ::= SEQUENCE { |
| 1307 |
salt OCTET STRING (SIZE(8)), |
| 1308 |
iterationCount INTEGER } |
| 1309 |
*/ |
| 1310 |
if (ord($this->_string_shift($temp)) != CRYPT_RSA_ASN1_SEQUENCE) { |
| 1311 |
return false; |
| 1312 |
} |
| 1313 |
if ($this->_decodeLength($temp) != strlen($temp)) { |
| 1314 |
return false; |
| 1315 |
} |
| 1316 |
$this->_string_shift($temp); // assume it's an octet string |
| 1317 |
$salt = $this->_string_shift($temp, $this->_decodeLength($temp)); |
| 1318 |
if (ord($this->_string_shift($temp)) != CRYPT_RSA_ASN1_INTEGER) { |
| 1319 |
return false; |
| 1320 |
} |
| 1321 |
$this->_decodeLength($temp); |
| 1322 |
list(, $iterationCount) = unpack('N', str_pad($temp, 4, chr(0), STR_PAD_LEFT)); |
| 1323 |
$this->_string_shift($key); // assume it's an octet string |
| 1324 |
$length = $this->_decodeLength($key); |
| 1325 |
if (strlen($key) != $length) { |
| 1326 |
return false; |
| 1327 |
} |
| 1328 |
|
| 1329 |
if (!class_exists('Crypt_DES')) { |
| 1330 |
include_once 'Crypt/DES.php'; |
| 1331 |
} |
| 1332 |
$crypto = new Crypt_DES(); |
| 1333 |
$crypto->setPassword($this->password, 'pbkdf1', 'md5', $salt, $iterationCount); |
| 1334 |
$key = $crypto->decrypt($key); |
| 1335 |
if ($key === false) { |
| 1336 |
return false; |
| 1337 |
} |
| 1338 |
return $this->_parseKey($key, CRYPT_RSA_PRIVATE_FORMAT_PKCS1); |
| 1339 |
default: |
| 1340 |
return false; |
| 1341 |
} |
| 1342 |
/* intended for keys for which OpenSSL's asn1parse returns the following: |
| 1343 |
|
| 1344 |
0:d=0 hl=4 l= 290 cons: SEQUENCE |
| 1345 |
4:d=1 hl=2 l= 13 cons: SEQUENCE |
| 1346 |
6:d=2 hl=2 l= 9 prim: OBJECT :rsaEncryption |
| 1347 |
17:d=2 hl=2 l= 0 prim: NULL |
| 1348 |
19:d=1 hl=4 l= 271 prim: BIT STRING */ |
| 1349 |
$tag = ord($this->_string_shift($key)); // skip over the BIT STRING / OCTET STRING tag |
| 1350 |
$this->_decodeLength($key); // skip over the BIT STRING / OCTET STRING length |
| 1351 |
// "The initial octet shall encode, as an unsigned binary integer wtih bit 1 as the least significant bit, the number of |
| 1352 |
// unused bits in the final subsequent octet. The number shall be in the range zero to seven." |
| 1353 |
// -- http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf (section 8.6.2.2) |
| 1354 |
if ($tag == CRYPT_RSA_ASN1_BITSTRING) { |
| 1355 |
$this->_string_shift($key); |
| 1356 |
} |
| 1357 |
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_SEQUENCE) { |
| 1358 |
return false; |
| 1359 |
} |
| 1360 |
if ($this->_decodeLength($key) != strlen($key)) { |
| 1361 |
return false; |
| 1362 |
} |
| 1363 |
$tag = ord($this->_string_shift($key)); |
| 1364 |
} |
| 1365 |
if ($tag != CRYPT_RSA_ASN1_INTEGER) { |
| 1366 |
return false; |
| 1367 |
} |
| 1368 |
|
| 1369 |
$length = $this->_decodeLength($key); |
| 1370 |
$temp = $this->_string_shift($key, $length); |
| 1371 |
if (strlen($temp) != 1 || ord($temp) > 2) { |
| 1372 |
$components['modulus'] = new Math_BigInteger($temp, 256); |
| 1373 |
$this->_string_shift($key); // skip over CRYPT_RSA_ASN1_INTEGER |
| 1374 |
$length = $this->_decodeLength($key); |
| 1375 |
$components[$type == CRYPT_RSA_PUBLIC_FORMAT_PKCS1 ? 'publicExponent' : 'privateExponent'] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1376 |
|
| 1377 |
return $components; |
| 1378 |
} |
| 1379 |
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_INTEGER) { |
| 1380 |
return false; |
| 1381 |
} |
| 1382 |
$length = $this->_decodeLength($key); |
| 1383 |
$components['modulus'] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1384 |
$this->_string_shift($key); |
| 1385 |
$length = $this->_decodeLength($key); |
| 1386 |
$components['publicExponent'] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1387 |
$this->_string_shift($key); |
| 1388 |
$length = $this->_decodeLength($key); |
| 1389 |
$components['privateExponent'] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1390 |
$this->_string_shift($key); |
| 1391 |
$length = $this->_decodeLength($key); |
| 1392 |
$components['primes'] = array(1 => new Math_BigInteger($this->_string_shift($key, $length), 256)); |
| 1393 |
$this->_string_shift($key); |
| 1394 |
$length = $this->_decodeLength($key); |
| 1395 |
$components['primes'][] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1396 |
$this->_string_shift($key); |
| 1397 |
$length = $this->_decodeLength($key); |
| 1398 |
$components['exponents'] = array(1 => new Math_BigInteger($this->_string_shift($key, $length), 256)); |
| 1399 |
$this->_string_shift($key); |
| 1400 |
$length = $this->_decodeLength($key); |
| 1401 |
$components['exponents'][] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1402 |
$this->_string_shift($key); |
| 1403 |
$length = $this->_decodeLength($key); |
| 1404 |
$components['coefficients'] = array(2 => new Math_BigInteger($this->_string_shift($key, $length), 256)); |
| 1405 |
|
| 1406 |
if (!empty($key)) { |
| 1407 |
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_SEQUENCE) { |
| 1408 |
return false; |
| 1409 |
} |
| 1410 |
$this->_decodeLength($key); |
| 1411 |
while (!empty($key)) { |
| 1412 |
if (ord($this->_string_shift($key)) != CRYPT_RSA_ASN1_SEQUENCE) { |
| 1413 |
return false; |
| 1414 |
} |
| 1415 |
$this->_decodeLength($key); |
| 1416 |
$key = substr($key, 1); |
| 1417 |
$length = $this->_decodeLength($key); |
| 1418 |
$components['primes'][] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1419 |
$this->_string_shift($key); |
| 1420 |
$length = $this->_decodeLength($key); |
| 1421 |
$components['exponents'][] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1422 |
$this->_string_shift($key); |
| 1423 |
$length = $this->_decodeLength($key); |
| 1424 |
$components['coefficients'][] = new Math_BigInteger($this->_string_shift($key, $length), 256); |
| 1425 |
} |
| 1426 |
} |
| 1427 |
|
| 1428 |
return $components; |
| 1429 |
case CRYPT_RSA_PUBLIC_FORMAT_OPENSSH: |
| 1430 |
$parts = preg_split("#[\t ]+#", $key); |
| 1431 |
|
| 1432 |
$key = isset($parts[1]) ? base64_decode($parts[1]) : false; |
| 1433 |
if ($key === false) { |
| 1434 |
return false; |
| 1435 |
} |
| 1436 |
|
| 1437 |
$comment = isset($parts[2]) ? $parts[2] : false; |
| 1438 |
|
| 1439 |
$cleanup = substr($key, 0, 11) == "\0\0\0\7ssh-rsa"; |
| 1440 |
|
| 1441 |
if (strlen($key) <= 4) { |
| 1442 |
return false; |
| 1443 |
} |
| 1444 |
extract(unpack('Nlength', $this->_string_shift($key, 4))); |
| 1445 |
$publicExponent = new Math_BigInteger($this->_string_shift($key, $length), -256); |
| 1446 |
if (strlen($key) <= 4) { |
| 1447 |
return false; |
| 1448 |
} |
| 1449 |
extract(unpack('Nlength', $this->_string_shift($key, 4))); |
| 1450 |
$modulus = new Math_BigInteger($this->_string_shift($key, $length), -256); |
| 1451 |
|
| 1452 |
if ($cleanup && strlen($key)) { |
| 1453 |
if (strlen($key) <= 4) { |
| 1454 |
return false; |
| 1455 |
} |
| 1456 |
extract(unpack('Nlength', $this->_string_shift($key, 4))); |
| 1457 |
$realModulus = new Math_BigInteger($this->_string_shift($key, $length), -256); |
| 1458 |
return strlen($key) ? false : array( |
| 1459 |
'modulus' => $realModulus, |
| 1460 |
'publicExponent' => $modulus, |
| 1461 |
'comment' => $comment |
| 1462 |
); |
| 1463 |
} else { |
| 1464 |
return strlen($key) ? false : array( |
| 1465 |
'modulus' => $modulus, |
| 1466 |
'publicExponent' => $publicExponent, |
| 1467 |
'comment' => $comment |
| 1468 |
); |
| 1469 |
} |
| 1470 |
// http://www.w3.org/TR/xmldsig-core/#sec-RSAKeyValue |
| 1471 |
// http://en.wikipedia.org/wiki/XML_Signature |
| 1472 |
case CRYPT_RSA_PRIVATE_FORMAT_XML: |
| 1473 |
case CRYPT_RSA_PUBLIC_FORMAT_XML: |
| 1474 |
if (!extension_loaded('xml')) { |
| 1475 |
return false; |
| 1476 |
} |
| 1477 |
|
| 1478 |
$this->components = array(); |
| 1479 |
|
| 1480 |
$xml = xml_parser_create('UTF-8'); |
| 1481 |
if (version_compare(PHP_VERSION, '8.4.0', '>=')) { |
| 1482 |
xml_set_element_handler($xml, array($this, '_start_element_handler'), array($this, '_stop_element_handler')); |
| 1483 |
xml_set_character_data_handler($xml, array($this, '_data_handler')); |
| 1484 |
} else { |
| 1485 |
xml_set_object($xml, $this); |
| 1486 |
xml_set_element_handler($xml, '_start_element_handler', '_stop_element_handler'); |
| 1487 |
xml_set_character_data_handler($xml, '_data_handler'); |
| 1488 |
} |
| 1489 |
// add <xml></xml> to account for "dangling" tags like <BitStrength>...</BitStrength> that are sometimes added |
| 1490 |
if (!xml_parse($xml, '<xml>' . $key . '</xml>')) { |
| 1491 |
if (is_resource($xml) && function_exists('xml_parser_free')) { |
| 1492 |
xml_parser_free($xml); |
| 1493 |
} |
| 1494 |
unset($xml); |
| 1495 |
return false; |
| 1496 |
} |
| 1497 |
|
| 1498 |
if (is_resource($xml) && function_exists('xml_parser_free')) { |
| 1499 |
xml_parser_free($xml); |
| 1500 |
} |
| 1501 |
unset($xml); |
| 1502 |
|
| 1503 |
return isset($this->components['modulus']) && isset($this->components['publicExponent']) ? $this->components : false; |
| 1504 |
// see PuTTY's SSHPUBK.C and https://tartarus.org/~simon/putty-snapshots/htmldoc/AppendixC.html |
| 1505 |
case CRYPT_RSA_PRIVATE_FORMAT_PUTTY: |
| 1506 |
$components = array(); |
| 1507 |
$key = preg_split('#\r\n|\r|\n#', $key); |
| 1508 |
if ($this->_string_shift($key[0], strlen('PuTTY-User-Key-File-')) != 'PuTTY-User-Key-File-') { |
| 1509 |
return false; |
| 1510 |
} |
| 1511 |
$version = (int) $this->_string_shift($key[0], 3); // should be either "2: " or "3: 0" prior to int casting |
| 1512 |
if ($version != 2 && $version != 3) { |
| 1513 |
return false; |
| 1514 |
} |
| 1515 |
$type = rtrim($key[0]); |
| 1516 |
if ($type != 'ssh-rsa') { |
| 1517 |
return false; |
| 1518 |
} |
| 1519 |
$encryption = trim(preg_replace('#Encryption: (.+)#', '$1', $key[1])); |
| 1520 |
$comment = trim(preg_replace('#Comment: (.+)#', '$1', $key[2])); |
| 1521 |
|
| 1522 |
$publicLength = trim(preg_replace('#Public-Lines: (\d+)#', '$1', $key[3])); |
| 1523 |
$public = base64_decode(implode('', array_map('trim', array_slice($key, 4, $publicLength)))); |
| 1524 |
$public = substr($public, 11); |
| 1525 |
extract(unpack('Nlength', $this->_string_shift($public, 4))); |
| 1526 |
$components['publicExponent'] = new Math_BigInteger($this->_string_shift($public, $length), -256); |
| 1527 |
extract(unpack('Nlength', $this->_string_shift($public, 4))); |
| 1528 |
$components['modulus'] = new Math_BigInteger($this->_string_shift($public, $length), -256); |
| 1529 |
|
| 1530 |
$offset = $publicLength + 4; |
| 1531 |
switch ($encryption) { |
| 1532 |
case 'aes256-cbc': |
| 1533 |
if (!class_exists('Crypt_AES')) { |
| 1534 |
include_once 'Crypt/AES.php'; |
| 1535 |
} |
| 1536 |
$crypto = new Crypt_AES(); |
| 1537 |
switch ($version) { |
| 1538 |
case 3: |
| 1539 |
if (!function_exists('sodium_crypto_pwhash')) { |
| 1540 |
return false; |
| 1541 |
} |
| 1542 |
$flavour = trim(preg_replace('#Key-Derivation: (.*)#', '$1', $key[$offset++])); |
| 1543 |
switch ($flavour) { |
| 1544 |
case 'Argon2i': |
| 1545 |
$flavour = SODIUM_CRYPTO_PWHASH_ALG_ARGON2I13; |
| 1546 |
break; |
| 1547 |
case 'Argon2id': |
| 1548 |
$flavour = SODIUM_CRYPTO_PWHASH_ALG_ARGON2ID13; |
| 1549 |
break; |
| 1550 |
default: |
| 1551 |
return false; |
| 1552 |
} |
| 1553 |
$memory = trim(preg_replace('#Argon2-Memory: (\d+)#', '$1', $key[$offset++])); |
| 1554 |
$passes = trim(preg_replace('#Argon2-Passes: (\d+)#', '$1', $key[$offset++])); |
| 1555 |
$parallelism = trim(preg_replace('#Argon2-Parallelism: (\d+)#', '$1', $key[$offset++])); |
| 1556 |
$salt = pack('H*', trim(preg_replace('#Argon2-Salt: ([0-9a-f]+)#', '$1', $key[$offset++]))); |
| 1557 |
|
| 1558 |
$length = 80; // keylen + ivlen + mac_keylen |
| 1559 |
$temp = sodium_crypto_pwhash($length, $this->password, $salt, $passes, $memory << 10, $flavour); |
| 1560 |
|
| 1561 |
$symkey = substr($temp, 0, 32); |
| 1562 |
$symiv = substr($temp, 32, 16); |
| 1563 |
break; |
| 1564 |
case 2: |
| 1565 |
$symkey = ''; |
| 1566 |
$sequence = 0; |
| 1567 |
while (strlen($symkey) < 32) { |
| 1568 |
$temp = pack('Na*', $sequence++, $this->password); |
| 1569 |
$symkey.= pack('H*', sha1($temp)); |
| 1570 |
} |
| 1571 |
$symkey = substr($symkey, 0, 32); |
| 1572 |
$symiv = str_repeat("\0", 16); |
| 1573 |
} |
| 1574 |
} |
| 1575 |
|
| 1576 |
$privateLength = trim(preg_replace('#Private-Lines: (\d+)#', '$1', $key[$offset++])); |
| 1577 |
$private = base64_decode(implode('', array_map('trim', array_slice($key, $offset, $privateLength)))); |
| 1578 |
|
| 1579 |
if ($encryption != 'none') { |
| 1580 |
$crypto->setKey($symkey); |
| 1581 |
$crypto->setIV($symiv); |
| 1582 |
$crypto->disablePadding(); |
| 1583 |
$private = $crypto->decrypt($private); |
| 1584 |
if ($private === false) { |
| 1585 |
return false; |
| 1586 |
} |
| 1587 |
} |
| 1588 |
|
| 1589 |
extract(unpack('Nlength', $this->_string_shift($private, 4))); |
| 1590 |
if (strlen($private) < $length) { |
| 1591 |
return false; |
| 1592 |
} |
| 1593 |
$components['privateExponent'] = new Math_BigInteger($this->_string_shift($private, $length), -256); |
| 1594 |
extract(unpack('Nlength', $this->_string_shift($private, 4))); |
| 1595 |
if (strlen($private) < $length) { |
| 1596 |
return false; |
| 1597 |
} |
| 1598 |
$components['primes'] = array(1 => new Math_BigInteger($this->_string_shift($private, $length), -256)); |
| 1599 |
extract(unpack('Nlength', $this->_string_shift($private, 4))); |
| 1600 |
if (strlen($private) < $length) { |
| 1601 |
return false; |
| 1602 |
} |
| 1603 |
$components['primes'][] = new Math_BigInteger($this->_string_shift($private, $length), -256); |
| 1604 |
|
| 1605 |
$temp = $components['primes'][1]->subtract($this->one); |
| 1606 |
$components['exponents'] = array(1 => $components['publicExponent']->modInverse($temp)); |
| 1607 |
$temp = $components['primes'][2]->subtract($this->one); |
| 1608 |
$components['exponents'][] = $components['publicExponent']->modInverse($temp); |
| 1609 |
|
| 1610 |
extract(unpack('Nlength', $this->_string_shift($private, 4))); |
| 1611 |
if (strlen($private) < $length) { |
| 1612 |
return false; |
| 1613 |
} |
| 1614 |
$components['coefficients'] = array(2 => new Math_BigInteger($this->_string_shift($private, $length), -256)); |
| 1615 |
|
| 1616 |
return $components; |
| 1617 |
case CRYPT_RSA_PRIVATE_FORMAT_OPENSSH: |
| 1618 |
$components = array(); |
| 1619 |
$decoded = $this->_extractBER($key); |
| 1620 |
$magic = $this->_string_shift($decoded, 15); |
| 1621 |
if ($magic !== "openssh-key-v1\0") { |
| 1622 |
return false; |
| 1623 |
} |
| 1624 |
extract(unpack('Nlength', $this->_string_shift($decoded, 4))); |
| 1625 |
if (strlen($decoded) < $length) { |
| 1626 |
return false; |
| 1627 |
} |
| 1628 |
$ciphername = $this->_string_shift($decoded, $length); |
| 1629 |
extract(unpack('Nlength', $this->_string_shift($decoded, 4))); |
| 1630 |
if (strlen($decoded) < $length) { |
| 1631 |
return false; |
| 1632 |
} |
| 1633 |
$kdfname = $this->_string_shift($decoded, $length); |
| 1634 |
extract(unpack('Nlength', $this->_string_shift($decoded, 4))); |
| 1635 |
if (strlen($decoded) < $length) { |
| 1636 |
return false; |
| 1637 |
} |
| 1638 |
$kdfoptions = $this->_string_shift($decoded, $length); |
| 1639 |
extract(unpack('Nnumkeys', $this->_string_shift($decoded, 4))); |
| 1640 |
if ($numkeys != 1 || ($ciphername != 'none' && $kdfname != 'bcrypt')) { |
| 1641 |
return false; |
| 1642 |
} |
| 1643 |
switch ($ciphername) { |
| 1644 |
case 'none': |
| 1645 |
break; |
| 1646 |
case 'aes256-ctr': |
| 1647 |
extract(unpack('Nlength', $this->_string_shift($kdfoptions, 4))); |
| 1648 |
if (strlen($kdfoptions) < $length) { |
| 1649 |
return false; |
| 1650 |
} |
| 1651 |
$salt = $this->_string_shift($kdfoptions, $length); |
| 1652 |
extract(unpack('Nrounds', $this->_string_shift($kdfoptions, 4))); |
| 1653 |
if (!class_exists('Crypt_AES')) { |
| 1654 |
include_once 'Crypt/AES.php'; |
| 1655 |
} |
| 1656 |
$crypto = new Crypt_AES(CRYPT_MODE_CTR); |
| 1657 |
$crypto->disablePadding(); |
| 1658 |
if (!$crypto->setPassword($this->password, 'bcrypt', $salt, $rounds, 32)) { |
| 1659 |
return false; |
| 1660 |
} |
| 1661 |
break; |
| 1662 |
default: |
| 1663 |
return false; |
| 1664 |
} |
| 1665 |
extract(unpack('Nlength', $this->_string_shift($decoded, 4))); |
| 1666 |
if (strlen($decoded) < $length) { |
| 1667 |
return false; |
| 1668 |
} |
| 1669 |
$publicKey = $this->_string_shift($decoded, $length); |
| 1670 |
extract(unpack('Nlength', $this->_string_shift($decoded, 4))); |
| 1671 |
if (strlen($decoded) < $length) { |
| 1672 |
return false; |
| 1673 |
} |
| 1674 |
|
| 1675 |
if ($this->_string_shift($publicKey, 11) !== "\0\0\0\7ssh-rsa") { |
| 1676 |
return false; |
| 1677 |
} |
| 1678 |
|
| 1679 |
$paddedKey = $this->_string_shift($decoded, $length); |
| 1680 |
if (isset($crypto)) { |
| 1681 |
$paddedKey = $crypto->decrypt($paddedKey); |
| 1682 |
} |
| 1683 |
|
| 1684 |
$checkint1 = $this->_string_shift($paddedKey, 4); |
| 1685 |
$checkint2 = $this->_string_shift($paddedKey, 4); |
| 1686 |
if (strlen($checkint1) != 4 || $checkint1 !== $checkint2) { |
| 1687 |
return false; |
| 1688 |
} |
| 1689 |
|
| 1690 |
if ($this->_string_shift($paddedKey, 11) !== "\0\0\0\7ssh-rsa") { |
| 1691 |
return false; |
| 1692 |
} |
| 1693 |
|
| 1694 |
$values = array( |
| 1695 |
&$components['modulus'], |
| 1696 |
&$components['publicExponent'], |
| 1697 |
&$components['privateExponent'], |
| 1698 |
&$components['coefficients'][2], |
| 1699 |
&$components['primes'][1], |
| 1700 |
&$components['primes'][2] |
| 1701 |
); |
| 1702 |
|
| 1703 |
for ($i = 0; $i < count($values); $i++) { |
| 1704 |
extract(unpack('Nlength', $this->_string_shift($paddedKey, 4))); |
| 1705 |
if (strlen($paddedKey) < $length) { |
| 1706 |
return false; |
| 1707 |
} |
| 1708 |
$values[$i] = new Math_BigInteger($this->_string_shift($paddedKey, $length), -256); |
| 1709 |
} |
| 1710 |
|
| 1711 |
extract(unpack('Nlength', $this->_string_shift($paddedKey, 4))); |
| 1712 |
if (strlen($paddedKey) < $length) { |
| 1713 |
return false; |
| 1714 |
} |
| 1715 |
$components['comment'] = $this->_string_shift($decoded, $length); |
| 1716 |
|
| 1717 |
$temp = $components['primes'][1]->subtract($this->one); |
| 1718 |
$components['exponents'] = array(1 => $components['publicExponent']->modInverse($temp)); |
| 1719 |
$temp = $components['primes'][2]->subtract($this->one); |
| 1720 |
$components['exponents'][] = $components['publicExponent']->modInverse($temp); |
| 1721 |
|
| 1722 |
return $components; |
| 1723 |
} |
| 1724 |
|
| 1725 |
return false; |
| 1726 |
} |
| 1727 |
|
| 1728 |
/** |
| 1729 |
* Returns the key size |
| 1730 |
* |
| 1731 |
* More specifically, this returns the size of the modulo in bits. |
| 1732 |
* |
| 1733 |
* @access public |
| 1734 |
* @return int |
| 1735 |
*/ |
| 1736 |
function getSize() |
| 1737 |
{ |
| 1738 |
return !isset($this->modulus) ? 0 : strlen($this->modulus->toBits()); |
| 1739 |
} |
| 1740 |
|
| 1741 |
/** |
| 1742 |
* Start Element Handler |
| 1743 |
* |
| 1744 |
* Called by xml_set_element_handler() |
| 1745 |
* |
| 1746 |
* @access private |
| 1747 |
* @param resource $parser |
| 1748 |
* @param string $name |
| 1749 |
* @param array $attribs |
| 1750 |
*/ |
| 1751 |
function _start_element_handler($parser, $name, $attribs) |
| 1752 |
{ |
| 1753 |
//$name = strtoupper($name); |
| 1754 |
switch ($name) { |
| 1755 |
case 'MODULUS': |
| 1756 |
$this->current = &$this->components['modulus']; |
| 1757 |
break; |
| 1758 |
case 'EXPONENT': |
| 1759 |
$this->current = &$this->components['publicExponent']; |
| 1760 |
break; |
| 1761 |
case 'P': |
| 1762 |
$this->current = &$this->components['primes'][1]; |
| 1763 |
break; |
| 1764 |
case 'Q': |
| 1765 |
$this->current = &$this->components['primes'][2]; |
| 1766 |
break; |
| 1767 |
case 'DP': |
| 1768 |
$this->current = &$this->components['exponents'][1]; |
| 1769 |
break; |
| 1770 |
case 'DQ': |
| 1771 |
$this->current = &$this->components['exponents'][2]; |
| 1772 |
break; |
| 1773 |
case 'INVERSEQ': |
| 1774 |
$this->current = &$this->components['coefficients'][2]; |
| 1775 |
break; |
| 1776 |
case 'D': |
| 1777 |
$this->current = &$this->components['privateExponent']; |
| 1778 |
} |
| 1779 |
$this->current = ''; |
| 1780 |
} |
| 1781 |
|
| 1782 |
/** |
| 1783 |
* Stop Element Handler |
| 1784 |
* |
| 1785 |
* Called by xml_set_element_handler() |
| 1786 |
* |
| 1787 |
* @access private |
| 1788 |
* @param resource $parser |
| 1789 |
* @param string $name |
| 1790 |
*/ |
| 1791 |
function _stop_element_handler($parser, $name) |
| 1792 |
{ |
| 1793 |
if (isset($this->current)) { |
| 1794 |
$this->current = new Math_BigInteger(base64_decode($this->current), 256); |
| 1795 |
unset($this->current); |
| 1796 |
} |
| 1797 |
} |
| 1798 |
|
| 1799 |
/** |
| 1800 |
* Data Handler |
| 1801 |
* |
| 1802 |
* Called by xml_set_character_data_handler() |
| 1803 |
* |
| 1804 |
* @access private |
| 1805 |
* @param resource $parser |
| 1806 |
* @param string $data |
| 1807 |
*/ |
| 1808 |
function _data_handler($parser, $data) |
| 1809 |
{ |
| 1810 |
if (!isset($this->current) || is_object($this->current)) { |
| 1811 |
return; |
| 1812 |
} |
| 1813 |
$this->current.= trim($data); |
| 1814 |
} |
| 1815 |
|
| 1816 |
/** |
| 1817 |
* Loads a public or private key |
| 1818 |
* |
| 1819 |
* Returns true on success and false on failure (ie. an incorrect password was provided or the key was malformed) |
| 1820 |
* |
| 1821 |
* @access public |
| 1822 |
* @param string $key |
| 1823 |
* @param int $type optional |
| 1824 |
*/ |
| 1825 |
function loadKey($key, $type = false) |
| 1826 |
{ |
| 1827 |
if (is_object($key) && strtolower(get_class($key)) == 'crypt_rsa') { |
| 1828 |
$this->privateKeyFormat = $key->privateKeyFormat; |
| 1829 |
$this->publicKeyFormat = $key->publicKeyFormat; |
| 1830 |
$this->k = $key->k; |
| 1831 |
$this->hLen = $key->hLen; |
| 1832 |
$this->sLen = $key->sLen; |
| 1833 |
$this->mgfHLen = $key->mgfHLen; |
| 1834 |
$this->encryptionMode = $key->encryptionMode; |
| 1835 |
$this->signatureMode = $key->signatureMode; |
| 1836 |
$this->password = $key->password; |
| 1837 |
$this->configFile = $key->configFile; |
| 1838 |
$this->comment = $key->comment; |
| 1839 |
|
| 1840 |
if (is_object($key->hash)) { |
| 1841 |
$this->hash = new Crypt_Hash($key->hash->getHash()); |
| 1842 |
} |
| 1843 |
if (is_object($key->mgfHash)) { |
| 1844 |
$this->mgfHash = new Crypt_Hash($key->mgfHash->getHash()); |
| 1845 |
} |
| 1846 |
|
| 1847 |
if (is_object($key->modulus)) { |
| 1848 |
$this->modulus = $key->modulus->copy(); |
| 1849 |
} |
| 1850 |
if (is_object($key->exponent)) { |
| 1851 |
$this->exponent = $key->exponent->copy(); |
| 1852 |
} |
| 1853 |
if (is_object($key->publicExponent)) { |
| 1854 |
$this->publicExponent = $key->publicExponent->copy(); |
| 1855 |
} |
| 1856 |
|
| 1857 |
$this->primes = array(); |
| 1858 |
$this->exponents = array(); |
| 1859 |
$this->coefficients = array(); |
| 1860 |
|
| 1861 |
foreach ($this->primes as $prime) { |
| 1862 |
$this->primes[] = $prime->copy(); |
| 1863 |
} |
| 1864 |
foreach ($this->exponents as $exponent) { |
| 1865 |
$this->exponents[] = $exponent->copy(); |
| 1866 |
} |
| 1867 |
foreach ($this->coefficients as $coefficient) { |
| 1868 |
$this->coefficients[] = $coefficient->copy(); |
| 1869 |
} |
| 1870 |
|
| 1871 |
return true; |
| 1872 |
} |
| 1873 |
|
| 1874 |
if ($type === false) { |
| 1875 |
$types = array( |
| 1876 |
CRYPT_RSA_PUBLIC_FORMAT_RAW, |
| 1877 |
CRYPT_RSA_PRIVATE_FORMAT_PKCS1, |
| 1878 |
CRYPT_RSA_PRIVATE_FORMAT_XML, |
| 1879 |
CRYPT_RSA_PRIVATE_FORMAT_PUTTY, |
| 1880 |
CRYPT_RSA_PUBLIC_FORMAT_OPENSSH, |
| 1881 |
CRYPT_RSA_PRIVATE_FORMAT_OPENSSH |
| 1882 |
); |
| 1883 |
foreach ($types as $type) { |
| 1884 |
$components = $this->_parseKey($key, $type); |
| 1885 |
if ($components !== false) { |
| 1886 |
break; |
| 1887 |
} |
| 1888 |
} |
| 1889 |
} else { |
| 1890 |
$components = $this->_parseKey($key, $type); |
| 1891 |
} |
| 1892 |
|
| 1893 |
if ($components === false) { |
| 1894 |
$this->comment = null; |
| 1895 |
$this->modulus = null; |
| 1896 |
$this->k = null; |
| 1897 |
$this->exponent = null; |
| 1898 |
$this->primes = null; |
| 1899 |
$this->exponents = null; |
| 1900 |
$this->coefficients = null; |
| 1901 |
$this->publicExponent = null; |
| 1902 |
|
| 1903 |
return false; |
| 1904 |
} |
| 1905 |
|
| 1906 |
if (isset($components['comment']) && $components['comment'] !== false) { |
| 1907 |
$this->comment = $components['comment']; |
| 1908 |
} |
| 1909 |
$this->modulus = $components['modulus']; |
| 1910 |
$this->k = strlen($this->modulus->toBytes()); |
| 1911 |
$this->exponent = isset($components['privateExponent']) ? $components['privateExponent'] : $components['publicExponent']; |
| 1912 |
if (isset($components['primes'])) { |
| 1913 |
$this->primes = $components['primes']; |
| 1914 |
$this->exponents = $components['exponents']; |
| 1915 |
$this->coefficients = $components['coefficients']; |
| 1916 |
$this->publicExponent = $components['publicExponent']; |
| 1917 |
} else { |
| 1918 |
$this->primes = array(); |
| 1919 |
$this->exponents = array(); |
| 1920 |
$this->coefficients = array(); |
| 1921 |
$this->publicExponent = false; |
| 1922 |
} |
| 1923 |
|
| 1924 |
switch ($type) { |
| 1925 |
case CRYPT_RSA_PUBLIC_FORMAT_OPENSSH: |
| 1926 |
case CRYPT_RSA_PUBLIC_FORMAT_RAW: |
| 1927 |
$this->setPublicKey(); |
| 1928 |
break; |
| 1929 |
case CRYPT_RSA_PRIVATE_FORMAT_PKCS1: |
| 1930 |
switch (true) { |
| 1931 |
case strpos($key, '-BEGIN PUBLIC KEY-') !== false: |
| 1932 |
case strpos($key, '-BEGIN RSA PUBLIC KEY-') !== false: |
| 1933 |
$this->setPublicKey(); |
| 1934 |
} |
| 1935 |
} |
| 1936 |
|
| 1937 |
return true; |
| 1938 |
} |
| 1939 |
|
| 1940 |
/** |
| 1941 |
* Sets the password |
| 1942 |
* |
| 1943 |
* Private keys can be encrypted with a password. To unset the password, pass in the empty string or false. |
| 1944 |
* Or rather, pass in $password such that empty($password) && !is_string($password) is true. |
| 1945 |
* |
| 1946 |
* @see self::createKey() |
| 1947 |
* @see self::loadKey() |
| 1948 |
* @access public |
| 1949 |
* @param string $password |
| 1950 |
*/ |
| 1951 |
function setPassword($password = false) |
| 1952 |
{ |
| 1953 |
$this->password = $password; |
| 1954 |
} |
| 1955 |
|
| 1956 |
/** |
| 1957 |
* Defines the public key |
| 1958 |
* |
| 1959 |
* Some private key formats define the public exponent and some don't. Those that don't define it are problematic when |
| 1960 |
* used in certain contexts. For example, in SSH-2, RSA authentication works by sending the public key along with a |
| 1961 |
* message signed by the private key to the server. The SSH-2 server looks the public key up in an index of public keys |
| 1962 |
* and if it's present then proceeds to verify the signature. Problem is, if your private key doesn't include the public |
| 1963 |
* exponent this won't work unless you manually add the public exponent. phpseclib tries to guess if the key being used |
| 1964 |
* is the public key but in the event that it guesses incorrectly you might still want to explicitly set the key as being |
| 1965 |
* public. |
| 1966 |
* |
| 1967 |
* Do note that when a new key is loaded the index will be cleared. |
| 1968 |
* |
| 1969 |
* Returns true on success, false on failure |
| 1970 |
* |
| 1971 |
* @see self::getPublicKey() |
| 1972 |
* @access public |
| 1973 |
* @param string $key optional |
| 1974 |
* @param int $type optional |
| 1975 |
* @return bool |
| 1976 |
*/ |
| 1977 |
function setPublicKey($key = false, $type = false) |
| 1978 |
{ |
| 1979 |
// if a public key has already been loaded return false |
| 1980 |
if (!empty($this->publicExponent)) { |
| 1981 |
return false; |
| 1982 |
} |
| 1983 |
|
| 1984 |
if ($key === false && !empty($this->modulus)) { |
| 1985 |
$this->publicExponent = $this->exponent; |
| 1986 |
return true; |
| 1987 |
} |
| 1988 |
|
| 1989 |
if ($type === false) { |
| 1990 |
$types = array( |
| 1991 |
CRYPT_RSA_PUBLIC_FORMAT_RAW, |
| 1992 |
CRYPT_RSA_PUBLIC_FORMAT_PKCS1, |
| 1993 |
CRYPT_RSA_PUBLIC_FORMAT_XML, |
| 1994 |
CRYPT_RSA_PUBLIC_FORMAT_OPENSSH |
| 1995 |
); |
| 1996 |
foreach ($types as $type) { |
| 1997 |
$components = $this->_parseKey($key, $type); |
| 1998 |
if ($components !== false) { |
| 1999 |
break; |
| 2000 |
} |
| 2001 |
} |
| 2002 |
} else { |
| 2003 |
$components = $this->_parseKey($key, $type); |
| 2004 |
} |
| 2005 |
|
| 2006 |
if ($components === false) { |
| 2007 |
return false; |
| 2008 |
} |
| 2009 |
|
| 2010 |
if (empty($this->modulus) || !$this->modulus->equals($components['modulus'])) { |
| 2011 |
$this->modulus = $components['modulus']; |
| 2012 |
$this->exponent = $this->publicExponent = $components['publicExponent']; |
| 2013 |
return true; |
| 2014 |
} |
| 2015 |
|
| 2016 |
$this->publicExponent = $components['publicExponent']; |
| 2017 |
|
| 2018 |
return true; |
| 2019 |
} |
| 2020 |
|
| 2021 |
/** |
| 2022 |
* Defines the private key |
| 2023 |
* |
| 2024 |
* If phpseclib guessed a private key was a public key and loaded it as such it might be desirable to force |
| 2025 |
* phpseclib to treat the key as a private key. This function will do that. |
| 2026 |
* |
| 2027 |
* Do note that when a new key is loaded the index will be cleared. |
| 2028 |
* |
| 2029 |
* Returns true on success, false on failure |
| 2030 |
* |
| 2031 |
* @see self::getPublicKey() |
| 2032 |
* @access public |
| 2033 |
* @param string $key optional |
| 2034 |
* @param int $type optional |
| 2035 |
* @return bool |
| 2036 |
*/ |
| 2037 |
function setPrivateKey($key = false, $type = false) |
| 2038 |
{ |
| 2039 |
if ($key === false && !empty($this->publicExponent)) { |
| 2040 |
$this->publicExponent = false; |
| 2041 |
return true; |
| 2042 |
} |
| 2043 |
|
| 2044 |
$rsa = new Crypt_RSA(); |
| 2045 |
if (!$rsa->loadKey($key, $type)) { |
| 2046 |
return false; |
| 2047 |
} |
| 2048 |
$rsa->publicExponent = false; |
| 2049 |
|
| 2050 |
// don't overwrite the old key if the new key is invalid |
| 2051 |
$this->loadKey($rsa); |
| 2052 |
return true; |
| 2053 |
} |
| 2054 |
|
| 2055 |
/** |
| 2056 |
* Returns the public key |
| 2057 |
* |
| 2058 |
* The public key is only returned under two circumstances - if the private key had the public key embedded within it |
| 2059 |
* or if the public key was set via setPublicKey(). If the currently loaded key is supposed to be the public key this |
| 2060 |
* function won't return it since this library, for the most part, doesn't distinguish between public and private keys. |
| 2061 |
* |
| 2062 |
* @see self::getPublicKey() |
| 2063 |
* @access public |
| 2064 |
* @param int $type optional |
| 2065 |
*/ |
| 2066 |
function getPublicKey($type = CRYPT_RSA_PUBLIC_FORMAT_PKCS8) |
| 2067 |
{ |
| 2068 |
if (empty($this->modulus) || empty($this->publicExponent)) { |
| 2069 |
return false; |
| 2070 |
} |
| 2071 |
|
| 2072 |
$oldFormat = $this->publicKeyFormat; |
| 2073 |
$this->publicKeyFormat = $type; |
| 2074 |
$temp = $this->_convertPublicKey($this->modulus, $this->publicExponent); |
| 2075 |
$this->publicKeyFormat = $oldFormat; |
| 2076 |
return $temp; |
| 2077 |
} |
| 2078 |
|
| 2079 |
/** |
| 2080 |
* Returns the public key's fingerprint |
| 2081 |
* |
| 2082 |
* The public key's fingerprint is returned, which is equivalent to running `ssh-keygen -lf rsa.pub`. If there is |
| 2083 |
* no public key currently loaded, false is returned. |
| 2084 |
* Example output (md5): "c1:b1:30:29:d7:b8:de:6c:97:77:10:d7:46:41:63:87" (as specified by RFC 4716) |
| 2085 |
* |
| 2086 |
* @access public |
| 2087 |
* @param string $algorithm The hashing algorithm to be used. Valid options are 'md5' and 'sha256'. False is returned |
| 2088 |
* for invalid values. |
| 2089 |
* @return mixed |
| 2090 |
*/ |
| 2091 |
function getPublicKeyFingerprint($algorithm = 'md5') |
| 2092 |
{ |
| 2093 |
if (empty($this->modulus) || empty($this->publicExponent)) { |
| 2094 |
return false; |
| 2095 |
} |
| 2096 |
|
| 2097 |
$modulus = $this->modulus->toBytes(true); |
| 2098 |
$publicExponent = $this->publicExponent->toBytes(true); |
| 2099 |
|
| 2100 |
$RSAPublicKey = pack('Na*Na*Na*', strlen('ssh-rsa'), 'ssh-rsa', strlen($publicExponent), $publicExponent, strlen($modulus), $modulus); |
| 2101 |
|
| 2102 |
switch ($algorithm) { |
| 2103 |
case 'sha256': |
| 2104 |
$hash = new Crypt_Hash('sha256'); |
| 2105 |
$base = base64_encode($hash->hash($RSAPublicKey)); |
| 2106 |
return substr($base, 0, strlen($base) - 1); |
| 2107 |
case 'md5': |
| 2108 |
return substr(chunk_split(md5($RSAPublicKey), 2, ':'), 0, -1); |
| 2109 |
default: |
| 2110 |
return false; |
| 2111 |
} |
| 2112 |
} |
| 2113 |
|
| 2114 |
/** |
| 2115 |
* Returns the private key |
| 2116 |
* |
| 2117 |
* The private key is only returned if the currently loaded key contains the constituent prime numbers. |
| 2118 |
* |
| 2119 |
* @see self::getPublicKey() |
| 2120 |
* @access public |
| 2121 |
* @param int $type optional |
| 2122 |
* @return mixed |
| 2123 |
*/ |
| 2124 |
function getPrivateKey($type = CRYPT_RSA_PUBLIC_FORMAT_PKCS1) |
| 2125 |
{ |
| 2126 |
if (empty($this->primes)) { |
| 2127 |
return false; |
| 2128 |
} |
| 2129 |
|
| 2130 |
$oldFormat = $this->privateKeyFormat; |
| 2131 |
$this->privateKeyFormat = $type; |
| 2132 |
$temp = $this->_convertPrivateKey($this->modulus, $this->publicExponent, $this->exponent, $this->primes, $this->exponents, $this->coefficients); |
| 2133 |
$this->privateKeyFormat = $oldFormat; |
| 2134 |
return $temp; |
| 2135 |
} |
| 2136 |
|
| 2137 |
/** |
| 2138 |
* Returns a minimalistic private key |
| 2139 |
* |
| 2140 |
* Returns the private key without the prime number constituants. Structurally identical to a public key that |
| 2141 |
* hasn't been set as the public key |
| 2142 |
* |
| 2143 |
* @see self::getPrivateKey() |
| 2144 |
* @access private |
| 2145 |
* @param int $mode optional |
| 2146 |
*/ |
| 2147 |
function _getPrivatePublicKey($mode = CRYPT_RSA_PUBLIC_FORMAT_PKCS8) |
| 2148 |
{ |
| 2149 |
if (empty($this->modulus) || empty($this->exponent)) { |
| 2150 |
return false; |
| 2151 |
} |
| 2152 |
|
| 2153 |
$oldFormat = $this->publicKeyFormat; |
| 2154 |
$this->publicKeyFormat = $mode; |
| 2155 |
$temp = $this->_convertPublicKey($this->modulus, $this->exponent); |
| 2156 |
$this->publicKeyFormat = $oldFormat; |
| 2157 |
return $temp; |
| 2158 |
} |
| 2159 |
|
| 2160 |
/** |
| 2161 |
* __toString() magic method |
| 2162 |
* |
| 2163 |
* @access public |
| 2164 |
* @return string |
| 2165 |
*/ |
| 2166 |
function __toString() |
| 2167 |
{ |
| 2168 |
$key = $this->getPrivateKey($this->privateKeyFormat); |
| 2169 |
if ($key !== false) { |
| 2170 |
return $key; |
| 2171 |
} |
| 2172 |
$key = $this->_getPrivatePublicKey($this->publicKeyFormat); |
| 2173 |
return $key !== false ? $key : ''; |
| 2174 |
} |
| 2175 |
|
| 2176 |
/** |
| 2177 |
* __clone() magic method |
| 2178 |
* |
| 2179 |
* @access public |
| 2180 |
* @return Crypt_RSA |
| 2181 |
*/ |
| 2182 |
function __clone() |
| 2183 |
{ |
| 2184 |
$key = new Crypt_RSA(); |
| 2185 |
$key->loadKey($this); |
| 2186 |
return $key; |
| 2187 |
} |
| 2188 |
|
| 2189 |
/** |
| 2190 |
* Generates the smallest and largest numbers requiring $bits bits |
| 2191 |
* |
| 2192 |
* @access private |
| 2193 |
* @param int $bits |
| 2194 |
* @return array |
| 2195 |
*/ |
| 2196 |
function _generateMinMax($bits) |
| 2197 |
{ |
| 2198 |
$bytes = $bits >> 3; |
| 2199 |
$min = str_repeat(chr(0), $bytes); |
| 2200 |
$max = str_repeat(chr(0xFF), $bytes); |
| 2201 |
$msb = $bits & 7; |
| 2202 |
if ($msb) { |
| 2203 |
$min = chr(1 << ($msb - 1)) . $min; |
| 2204 |
$max = chr((1 << $msb) - 1) . $max; |
| 2205 |
} else { |
| 2206 |
$min[0] = chr(0x80); |
| 2207 |
} |
| 2208 |
|
| 2209 |
return array( |
| 2210 |
'min' => new Math_BigInteger($min, 256), |
| 2211 |
'max' => new Math_BigInteger($max, 256) |
| 2212 |
); |
| 2213 |
} |
| 2214 |
|
| 2215 |
/** |
| 2216 |
* DER-decode the length |
| 2217 |
* |
| 2218 |
* DER supports lengths up to (2**8)**127, however, we'll only support lengths up to (2**8)**4. See |
| 2219 |
* {@link http://itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf#p=13 X.690 paragraph 8.1.3} for more information. |
| 2220 |
* |
| 2221 |
* @access private |
| 2222 |
* @param string $string |
| 2223 |
* @return int |
| 2224 |
*/ |
| 2225 |
function _decodeLength(&$string) |
| 2226 |
{ |
| 2227 |
$length = ord($this->_string_shift($string)); |
| 2228 |
if ($length & 0x80) { // definite length, long form |
| 2229 |
$length&= 0x7F; |
| 2230 |
$temp = $this->_string_shift($string, $length); |
| 2231 |
list(, $length) = unpack('N', substr(str_pad($temp, 4, chr(0), STR_PAD_LEFT), -4)); |
| 2232 |
} |
| 2233 |
return $length; |
| 2234 |
} |
| 2235 |
|
| 2236 |
/** |
| 2237 |
* DER-encode the length |
| 2238 |
* |
| 2239 |
* DER supports lengths up to (2**8)**127, however, we'll only support lengths up to (2**8)**4. See |
| 2240 |
* {@link http://itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf#p=13 X.690 paragraph 8.1.3} for more information. |
| 2241 |
* |
| 2242 |
* @access private |
| 2243 |
* @param int $length |
| 2244 |
* @return string |
| 2245 |
*/ |
| 2246 |
function _encodeLength($length) |
| 2247 |
{ |
| 2248 |
if ($length <= 0x7F) { |
| 2249 |
return chr($length); |
| 2250 |
} |
| 2251 |
|
| 2252 |
$temp = ltrim(pack('N', $length), chr(0)); |
| 2253 |
return pack('Ca*', 0x80 | strlen($temp), $temp); |
| 2254 |
} |
| 2255 |
|
| 2256 |
/** |
| 2257 |
* String Shift |
| 2258 |
* |
| 2259 |
* Inspired by array_shift |
| 2260 |
* |
| 2261 |
* @param string $string |
| 2262 |
* @param int $index |
| 2263 |
* @return string |
| 2264 |
* @access private |
| 2265 |
*/ |
| 2266 |
function _string_shift(&$string, $index = 1) |
| 2267 |
{ |
| 2268 |
$substr = substr($string, 0, $index); |
| 2269 |
$string = substr($string, $index); |
| 2270 |
return $substr; |
| 2271 |
} |
| 2272 |
|
| 2273 |
/** |
| 2274 |
* Determines the private key format |
| 2275 |
* |
| 2276 |
* @see self::createKey() |
| 2277 |
* @access public |
| 2278 |
* @param int $format |
| 2279 |
*/ |
| 2280 |
function setPrivateKeyFormat($format) |
| 2281 |
{ |
| 2282 |
$this->privateKeyFormat = $format; |
| 2283 |
} |
| 2284 |
|
| 2285 |
/** |
| 2286 |
* Determines the public key format |
| 2287 |
* |
| 2288 |
* @see self::createKey() |
| 2289 |
* @access public |
| 2290 |
* @param int $format |
| 2291 |
*/ |
| 2292 |
function setPublicKeyFormat($format) |
| 2293 |
{ |
| 2294 |
$this->publicKeyFormat = $format; |
| 2295 |
} |
| 2296 |
|
| 2297 |
/** |
| 2298 |
* Determines which hashing function should be used |
| 2299 |
* |
| 2300 |
* Used with signature production / verification and (if the encryption mode is CRYPT_RSA_ENCRYPTION_OAEP) encryption and |
| 2301 |
* decryption. If $hash isn't supported, sha1 is used. |
| 2302 |
* |
| 2303 |
* @access public |
| 2304 |
* @param string $hash |
| 2305 |
*/ |
| 2306 |
function setHash($hash) |
| 2307 |
{ |
| 2308 |
// Crypt_Hash supports algorithms that PKCS#1 doesn't support. md5-96 and sha1-96, for example. |
| 2309 |
switch ($hash) { |
| 2310 |
case 'md2': |
| 2311 |
case 'md5': |
| 2312 |
case 'sha1': |
| 2313 |
case 'sha256': |
| 2314 |
case 'sha384': |
| 2315 |
case 'sha512': |
| 2316 |
$this->hash = new Crypt_Hash($hash); |
| 2317 |
$this->hashName = $hash; |
| 2318 |
break; |
| 2319 |
default: |
| 2320 |
$this->hash = new Crypt_Hash('sha1'); |
| 2321 |
$this->hashName = 'sha1'; |
| 2322 |
} |
| 2323 |
$this->hLen = $this->hash->getLength(); |
| 2324 |
} |
| 2325 |
|
| 2326 |
/** |
| 2327 |
* Determines which hashing function should be used for the mask generation function |
| 2328 |
* |
| 2329 |
* The mask generation function is used by CRYPT_RSA_ENCRYPTION_OAEP and CRYPT_RSA_SIGNATURE_PSS and although it's |
| 2330 |
* best if Hash and MGFHash are set to the same thing this is not a requirement. |
| 2331 |
* |
| 2332 |
* @access public |
| 2333 |
* @param string $hash |
| 2334 |
*/ |
| 2335 |
function setMGFHash($hash) |
| 2336 |
{ |
| 2337 |
// Crypt_Hash supports algorithms that PKCS#1 doesn't support. md5-96 and sha1-96, for example. |
| 2338 |
switch ($hash) { |
| 2339 |
case 'md2': |
| 2340 |
case 'md5': |
| 2341 |
case 'sha1': |
| 2342 |
case 'sha256': |
| 2343 |
case 'sha384': |
| 2344 |
case 'sha512': |
| 2345 |
$this->mgfHash = new Crypt_Hash($hash); |
| 2346 |
break; |
| 2347 |
default: |
| 2348 |
$this->mgfHash = new Crypt_Hash('sha1'); |
| 2349 |
} |
| 2350 |
$this->mgfHLen = $this->mgfHash->getLength(); |
| 2351 |
} |
| 2352 |
|
| 2353 |
/** |
| 2354 |
* Determines the salt length |
| 2355 |
* |
| 2356 |
* To quote from {@link http://tools.ietf.org/html/rfc3447#page-38 RFC3447#page-38}: |
| 2357 |
* |
| 2358 |
* Typical salt lengths in octets are hLen (the length of the output |
| 2359 |
* of the hash function Hash) and 0. |
| 2360 |
* |
| 2361 |
* @access public |
| 2362 |
* @param int $sLen |
| 2363 |
*/ |
| 2364 |
function setSaltLength($sLen) |
| 2365 |
{ |
| 2366 |
$this->sLen = $sLen; |
| 2367 |
} |
| 2368 |
|
| 2369 |
/** |
| 2370 |
* Integer-to-Octet-String primitive |
| 2371 |
* |
| 2372 |
* See {@link http://tools.ietf.org/html/rfc3447#section-4.1 RFC3447#section-4.1}. |
| 2373 |
* |
| 2374 |
* @access private |
| 2375 |
* @param Math_BigInteger $x |
| 2376 |
* @param int $xLen |
| 2377 |
* @return string |
| 2378 |
*/ |
| 2379 |
function _i2osp($x, $xLen) |
| 2380 |
{ |
| 2381 |
$x = $x->toBytes(); |
| 2382 |
if (strlen($x) > $xLen) { |
| 2383 |
user_error('Integer too large'); |
| 2384 |
return false; |
| 2385 |
} |
| 2386 |
return str_pad($x, $xLen, chr(0), STR_PAD_LEFT); |
| 2387 |
} |
| 2388 |
|
| 2389 |
/** |
| 2390 |
* Octet-String-to-Integer primitive |
| 2391 |
* |
| 2392 |
* See {@link http://tools.ietf.org/html/rfc3447#section-4.2 RFC3447#section-4.2}. |
| 2393 |
* |
| 2394 |
* @access private |
| 2395 |
* @param int|string|resource $x |
| 2396 |
* @return Math_BigInteger |
| 2397 |
*/ |
| 2398 |
function _os2ip($x) |
| 2399 |
{ |
| 2400 |
return new Math_BigInteger($x, 256); |
| 2401 |
} |
| 2402 |
|
| 2403 |
/** |
| 2404 |
* Exponentiate with or without Chinese Remainder Theorem |
| 2405 |
* |
| 2406 |
* See {@link http://tools.ietf.org/html/rfc3447#section-5.1.1 RFC3447#section-5.1.2}. |
| 2407 |
* |
| 2408 |
* @access private |
| 2409 |
* @param Math_BigInteger $x |
| 2410 |
* @return Math_BigInteger |
| 2411 |
*/ |
| 2412 |
function _exponentiate($x) |
| 2413 |
{ |
| 2414 |
switch (true) { |
| 2415 |
case empty($this->primes): |
| 2416 |
case $this->primes[1]->equals($this->zero): |
| 2417 |
case empty($this->coefficients): |
| 2418 |
case $this->coefficients[2]->equals($this->zero): |
| 2419 |
case empty($this->exponents): |
| 2420 |
case $this->exponents[1]->equals($this->zero): |
| 2421 |
return $x->modPow($this->exponent, $this->modulus); |
| 2422 |
} |
| 2423 |
|
| 2424 |
$num_primes = count($this->primes); |
| 2425 |
|
| 2426 |
if (defined('CRYPT_RSA_DISABLE_BLINDING')) { |
| 2427 |
$m_i = array( |
| 2428 |
1 => $x->modPow($this->exponents[1], $this->primes[1]), |
| 2429 |
2 => $x->modPow($this->exponents[2], $this->primes[2]) |
| 2430 |
); |
| 2431 |
$h = $m_i[1]->subtract($m_i[2]); |
| 2432 |
$h = $h->multiply($this->coefficients[2]); |
| 2433 |
list(, $h) = $h->divide($this->primes[1]); |
| 2434 |
$m = $m_i[2]->add($h->multiply($this->primes[2])); |
| 2435 |
|
| 2436 |
$r = $this->primes[1]; |
| 2437 |
for ($i = 3; $i <= $num_primes; $i++) { |
| 2438 |
$m_i = $x->modPow($this->exponents[$i], $this->primes[$i]); |
| 2439 |
|
| 2440 |
$r = $r->multiply($this->primes[$i - 1]); |
| 2441 |
|
| 2442 |
$h = $m_i->subtract($m); |
| 2443 |
$h = $h->multiply($this->coefficients[$i]); |
| 2444 |
list(, $h) = $h->divide($this->primes[$i]); |
| 2445 |
|
| 2446 |
$m = $m->add($r->multiply($h)); |
| 2447 |
} |
| 2448 |
} else { |
| 2449 |
$smallest = $this->primes[1]; |
| 2450 |
for ($i = 2; $i <= $num_primes; $i++) { |
| 2451 |
if ($smallest->compare($this->primes[$i]) > 0) { |
| 2452 |
$smallest = $this->primes[$i]; |
| 2453 |
} |
| 2454 |
} |
| 2455 |
|
| 2456 |
$one = new Math_BigInteger(1); |
| 2457 |
|
| 2458 |
$r = $one->random($one, $smallest->subtract($one)); |
| 2459 |
|
| 2460 |
$m_i = array( |
| 2461 |
1 => $this->_blind($x, $r, 1), |
| 2462 |
2 => $this->_blind($x, $r, 2) |
| 2463 |
); |
| 2464 |
$h = $m_i[1]->subtract($m_i[2]); |
| 2465 |
$h = $h->multiply($this->coefficients[2]); |
| 2466 |
list(, $h) = $h->divide($this->primes[1]); |
| 2467 |
$m = $m_i[2]->add($h->multiply($this->primes[2])); |
| 2468 |
|
| 2469 |
$r = $this->primes[1]; |
| 2470 |
for ($i = 3; $i <= $num_primes; $i++) { |
| 2471 |
$m_i = $this->_blind($x, $r, $i); |
| 2472 |
|
| 2473 |
$r = $r->multiply($this->primes[$i - 1]); |
| 2474 |
|
| 2475 |
$h = $m_i->subtract($m); |
| 2476 |
$h = $h->multiply($this->coefficients[$i]); |
| 2477 |
list(, $h) = $h->divide($this->primes[$i]); |
| 2478 |
|
| 2479 |
$m = $m->add($r->multiply($h)); |
| 2480 |
} |
| 2481 |
} |
| 2482 |
|
| 2483 |
return $m; |
| 2484 |
} |
| 2485 |
|
| 2486 |
/** |
| 2487 |
* Performs RSA Blinding |
| 2488 |
* |
| 2489 |
* Protects against timing attacks by employing RSA Blinding. |
| 2490 |
* Returns $x->modPow($this->exponents[$i], $this->primes[$i]) |
| 2491 |
* |
| 2492 |
* @access private |
| 2493 |
* @param Math_BigInteger $x |
| 2494 |
* @param Math_BigInteger $r |
| 2495 |
* @param int $i |
| 2496 |
* @return Math_BigInteger |
| 2497 |
*/ |
| 2498 |
function _blind($x, $r, $i) |
| 2499 |
{ |
| 2500 |
$x = $x->multiply($r->modPow($this->publicExponent, $this->primes[$i])); |
| 2501 |
$x = $x->modPow($this->exponents[$i], $this->primes[$i]); |
| 2502 |
|
| 2503 |
$r = $r->modInverse($this->primes[$i]); |
| 2504 |
$x = $x->multiply($r); |
| 2505 |
list(, $x) = $x->divide($this->primes[$i]); |
| 2506 |
|
| 2507 |
return $x; |
| 2508 |
} |
| 2509 |
|
| 2510 |
/** |
| 2511 |
* Performs blinded RSA equality testing |
| 2512 |
* |
| 2513 |
* Protects against a particular type of timing attack described. |
| 2514 |
* |
| 2515 |
* See {@link http://codahale.com/a-lesson-in-timing-attacks/ A Lesson In Timing Attacks (or, Don't use MessageDigest.isEquals)} |
| 2516 |
* |
| 2517 |
* Thanks for the heads up singpolyma! |
| 2518 |
* |
| 2519 |
* @access private |
| 2520 |
* @param string $x |
| 2521 |
* @param string $y |
| 2522 |
* @return bool |
| 2523 |
*/ |
| 2524 |
function _equals($x, $y) |
| 2525 |
{ |
| 2526 |
if (function_exists('hash_equals')) { |
| 2527 |
return hash_equals($x, $y); |
| 2528 |
} |
| 2529 |
|
| 2530 |
if (strlen($x) != strlen($y)) { |
| 2531 |
return false; |
| 2532 |
} |
| 2533 |
|
| 2534 |
$result = "\0"; |
| 2535 |
$x^= $y; |
| 2536 |
for ($i = 0; $i < strlen($x); $i++) { |
| 2537 |
$result|= $x[$i]; |
| 2538 |
} |
| 2539 |
|
| 2540 |
return $result === "\0"; |
| 2541 |
} |
| 2542 |
|
| 2543 |
/** |
| 2544 |
* RSAEP |
| 2545 |
* |
| 2546 |
* See {@link http://tools.ietf.org/html/rfc3447#section-5.1.1 RFC3447#section-5.1.1}. |
| 2547 |
* |
| 2548 |
* @access private |
| 2549 |
* @param Math_BigInteger $m |
| 2550 |
* @return Math_BigInteger |
| 2551 |
*/ |
| 2552 |
function _rsaep($m) |
| 2553 |
{ |
| 2554 |
if ($m->compare($this->zero) < 0 || $m->compare($this->modulus) > 0) { |
| 2555 |
user_error('Message representative out of range'); |
| 2556 |
return false; |
| 2557 |
} |
| 2558 |
return $this->_exponentiate($m); |
| 2559 |
} |
| 2560 |
|
| 2561 |
/** |
| 2562 |
* RSADP |
| 2563 |
* |
| 2564 |
* See {@link http://tools.ietf.org/html/rfc3447#section-5.1.2 RFC3447#section-5.1.2}. |
| 2565 |
* |
| 2566 |
* @access private |
| 2567 |
* @param Math_BigInteger $c |
| 2568 |
* @return Math_BigInteger |
| 2569 |
*/ |
| 2570 |
function _rsadp($c) |
| 2571 |
{ |
| 2572 |
if ($c->compare($this->zero) < 0 || $c->compare($this->modulus) > 0) { |
| 2573 |
user_error('Ciphertext representative out of range'); |
| 2574 |
return false; |
| 2575 |
} |
| 2576 |
return $this->_exponentiate($c); |
| 2577 |
} |
| 2578 |
|
| 2579 |
/** |
| 2580 |
* RSASP1 |
| 2581 |
* |
| 2582 |
* See {@link http://tools.ietf.org/html/rfc3447#section-5.2.1 RFC3447#section-5.2.1}. |
| 2583 |
* |
| 2584 |
* @access private |
| 2585 |
* @param Math_BigInteger $m |
| 2586 |
* @return Math_BigInteger |
| 2587 |
*/ |
| 2588 |
function _rsasp1($m) |
| 2589 |
{ |
| 2590 |
if ($m->compare($this->zero) < 0 || $m->compare($this->modulus) > 0) { |
| 2591 |
user_error('Message representative out of range'); |
| 2592 |
return false; |
| 2593 |
} |
| 2594 |
return $this->_exponentiate($m); |
| 2595 |
} |
| 2596 |
|
| 2597 |
/** |
| 2598 |
* RSAVP1 |
| 2599 |
* |
| 2600 |
* See {@link http://tools.ietf.org/html/rfc3447#section-5.2.2 RFC3447#section-5.2.2}. |
| 2601 |
* |
| 2602 |
* @access private |
| 2603 |
* @param Math_BigInteger $s |
| 2604 |
* @return Math_BigInteger |
| 2605 |
*/ |
| 2606 |
function _rsavp1($s) |
| 2607 |
{ |
| 2608 |
if ($s->compare($this->zero) < 0 || $s->compare($this->modulus) > 0) { |
| 2609 |
user_error('Signature representative out of range'); |
| 2610 |
return false; |
| 2611 |
} |
| 2612 |
return $this->_exponentiate($s); |
| 2613 |
} |
| 2614 |
|
| 2615 |
/** |
| 2616 |
* MGF1 |
| 2617 |
* |
| 2618 |
* See {@link http://tools.ietf.org/html/rfc3447#appendix-B.2.1 RFC3447#appendix-B.2.1}. |
| 2619 |
* |
| 2620 |
* @access private |
| 2621 |
* @param string $mgfSeed |
| 2622 |
* @param int $maskLen |
| 2623 |
* @return string |
| 2624 |
*/ |
| 2625 |
function _mgf1($mgfSeed, $maskLen) |
| 2626 |
{ |
| 2627 |
// if $maskLen would yield strings larger than 4GB, PKCS#1 suggests a "Mask too long" error be output. |
| 2628 |
|
| 2629 |
$t = ''; |
| 2630 |
$count = ceil($maskLen / $this->mgfHLen); |
| 2631 |
for ($i = 0; $i < $count; $i++) { |
| 2632 |
$c = pack('N', $i); |
| 2633 |
$t.= $this->mgfHash->hash($mgfSeed . $c); |
| 2634 |
} |
| 2635 |
|
| 2636 |
return substr($t, 0, $maskLen); |
| 2637 |
} |
| 2638 |
|
| 2639 |
/** |
| 2640 |
* RSAES-OAEP-ENCRYPT |
| 2641 |
* |
| 2642 |
* See {@link http://tools.ietf.org/html/rfc3447#section-7.1.1 RFC3447#section-7.1.1} and |
| 2643 |
* {http://en.wikipedia.org/wiki/Optimal_Asymmetric_Encryption_Padding OAES}. |
| 2644 |
* |
| 2645 |
* @access private |
| 2646 |
* @param string $m |
| 2647 |
* @param string $l |
| 2648 |
* @return string |
| 2649 |
*/ |
| 2650 |
function _rsaes_oaep_encrypt($m, $l = '') |
| 2651 |
{ |
| 2652 |
$mLen = strlen($m); |
| 2653 |
|
| 2654 |
// Length checking |
| 2655 |
|
| 2656 |
// if $l is larger than two million terrabytes and you're using sha1, PKCS#1 suggests a "Label too long" error |
| 2657 |
// be output. |
| 2658 |
|
| 2659 |
if ($mLen > $this->k - 2 * $this->hLen - 2) { |
| 2660 |
user_error('Message too long'); |
| 2661 |
return false; |
| 2662 |
} |
| 2663 |
|
| 2664 |
// EME-OAEP encoding |
| 2665 |
|
| 2666 |
$lHash = $this->hash->hash($l); |
| 2667 |
$ps = str_repeat(chr(0), $this->k - $mLen - 2 * $this->hLen - 2); |
| 2668 |
$db = $lHash . $ps . chr(1) . $m; |
| 2669 |
$seed = crypt_random_string($this->hLen); |
| 2670 |
$dbMask = $this->_mgf1($seed, $this->k - $this->hLen - 1); |
| 2671 |
$maskedDB = $db ^ $dbMask; |
| 2672 |
$seedMask = $this->_mgf1($maskedDB, $this->hLen); |
| 2673 |
$maskedSeed = $seed ^ $seedMask; |
| 2674 |
$em = chr(0) . $maskedSeed . $maskedDB; |
| 2675 |
|
| 2676 |
// RSA encryption |
| 2677 |
|
| 2678 |
$m = $this->_os2ip($em); |
| 2679 |
$c = $this->_rsaep($m); |
| 2680 |
$c = $this->_i2osp($c, $this->k); |
| 2681 |
|
| 2682 |
// Output the ciphertext C |
| 2683 |
|
| 2684 |
return $c; |
| 2685 |
} |
| 2686 |
|
| 2687 |
/** |
| 2688 |
* RSAES-OAEP-DECRYPT |
| 2689 |
* |
| 2690 |
* See {@link http://tools.ietf.org/html/rfc3447#section-7.1.2 RFC3447#section-7.1.2}. The fact that the error |
| 2691 |
* messages aren't distinguishable from one another hinders debugging, but, to quote from RFC3447#section-7.1.2: |
| 2692 |
* |
| 2693 |
* Note. Care must be taken to ensure that an opponent cannot |
| 2694 |
* distinguish the different error conditions in Step 3.g, whether by |
| 2695 |
* error message or timing, or, more generally, learn partial |
| 2696 |
* information about the encoded message EM. Otherwise an opponent may |
| 2697 |
* be able to obtain useful information about the decryption of the |
| 2698 |
* ciphertext C, leading to a chosen-ciphertext attack such as the one |
| 2699 |
* observed by Manger [36]. |
| 2700 |
* |
| 2701 |
* As for $l... to quote from {@link http://tools.ietf.org/html/rfc3447#page-17 RFC3447#page-17}: |
| 2702 |
* |
| 2703 |
* Both the encryption and the decryption operations of RSAES-OAEP take |
| 2704 |
* the value of a label L as input. In this version of PKCS #1, L is |
| 2705 |
* the empty string; other uses of the label are outside the scope of |
| 2706 |
* this document. |
| 2707 |
* |
| 2708 |
* @access private |
| 2709 |
* @param string $c |
| 2710 |
* @param string $l |
| 2711 |
* @return string |
| 2712 |
*/ |
| 2713 |
function _rsaes_oaep_decrypt($c, $l = '') |
| 2714 |
{ |
| 2715 |
// Length checking |
| 2716 |
|
| 2717 |
// if $l is larger than two million terrabytes and you're using sha1, PKCS#1 suggests a "Label too long" error |
| 2718 |
// be output. |
| 2719 |
|
| 2720 |
if (strlen($c) != $this->k || $this->k < 2 * $this->hLen + 2) { |
| 2721 |
user_error('Decryption error'); |
| 2722 |
return false; |
| 2723 |
} |
| 2724 |
|
| 2725 |
// RSA decryption |
| 2726 |
|
| 2727 |
$c = $this->_os2ip($c); |
| 2728 |
$m = $this->_rsadp($c); |
| 2729 |
if ($m === false) { |
| 2730 |
user_error('Decryption error'); |
| 2731 |
return false; |
| 2732 |
} |
| 2733 |
$em = $this->_i2osp($m, $this->k); |
| 2734 |
|
| 2735 |
// EME-OAEP decoding |
| 2736 |
|
| 2737 |
$lHash = $this->hash->hash($l); |
| 2738 |
$y = ord($em[0]); |
| 2739 |
$maskedSeed = substr($em, 1, $this->hLen); |
| 2740 |
$maskedDB = substr($em, $this->hLen + 1); |
| 2741 |
$seedMask = $this->_mgf1($maskedDB, $this->hLen); |
| 2742 |
$seed = $maskedSeed ^ $seedMask; |
| 2743 |
$dbMask = $this->_mgf1($seed, $this->k - $this->hLen - 1); |
| 2744 |
$db = $maskedDB ^ $dbMask; |
| 2745 |
$lHash2 = substr($db, 0, $this->hLen); |
| 2746 |
$m = substr($db, $this->hLen); |
| 2747 |
$hashesMatch = $this->_equals($lHash, $lHash2); |
| 2748 |
$leadingZeros = 1; |
| 2749 |
$patternMatch = 0; |
| 2750 |
$offset = 0; |
| 2751 |
for ($i = 0; $i < strlen($m); $i++) { |
| 2752 |
$patternMatch|= $leadingZeros & ($m[$i] === "\1"); |
| 2753 |
$leadingZeros&= $m[$i] === "\0"; |
| 2754 |
$offset+= $patternMatch ? 0 : 1; |
| 2755 |
} |
| 2756 |
|
| 2757 |
// we do | instead of || to avoid https://en.wikipedia.org/wiki/Short-circuit_evaluation |
| 2758 |
// to protect against timing attacks |
| 2759 |
if (!$hashesMatch | !$patternMatch) { |
| 2760 |
user_error('Decryption error'); |
| 2761 |
return false; |
| 2762 |
} |
| 2763 |
|
| 2764 |
// Output the message M |
| 2765 |
|
| 2766 |
return substr($m, $offset + 1); |
| 2767 |
} |
| 2768 |
|
| 2769 |
/** |
| 2770 |
* Raw Encryption / Decryption |
| 2771 |
* |
| 2772 |
* Doesn't use padding and is not recommended. |
| 2773 |
* |
| 2774 |
* @access private |
| 2775 |
* @param string $m |
| 2776 |
* @return string |
| 2777 |
*/ |
| 2778 |
function _raw_encrypt($m) |
| 2779 |
{ |
| 2780 |
$temp = $this->_os2ip($m); |
| 2781 |
$temp = $this->_rsaep($temp); |
| 2782 |
return $this->_i2osp($temp, $this->k); |
| 2783 |
} |
| 2784 |
|
| 2785 |
/** |
| 2786 |
* RSAES-PKCS1-V1_5-ENCRYPT |
| 2787 |
* |
| 2788 |
* See {@link http://tools.ietf.org/html/rfc3447#section-7.2.1 RFC3447#section-7.2.1}. |
| 2789 |
* |
| 2790 |
* @access private |
| 2791 |
* @param string $m |
| 2792 |
* @return string |
| 2793 |
*/ |
| 2794 |
function _rsaes_pkcs1_v1_5_encrypt($m) |
| 2795 |
{ |
| 2796 |
$mLen = strlen($m); |
| 2797 |
|
| 2798 |
// Length checking |
| 2799 |
|
| 2800 |
if ($mLen > $this->k - 11) { |
| 2801 |
user_error('Message too long'); |
| 2802 |
return false; |
| 2803 |
} |
| 2804 |
|
| 2805 |
// EME-PKCS1-v1_5 encoding |
| 2806 |
|
| 2807 |
$psLen = $this->k - $mLen - 3; |
| 2808 |
$ps = ''; |
| 2809 |
while (strlen($ps) != $psLen) { |
| 2810 |
$temp = crypt_random_string($psLen - strlen($ps)); |
| 2811 |
$temp = str_replace("\x00", '', $temp); |
| 2812 |
$ps.= $temp; |
| 2813 |
} |
| 2814 |
$type = 2; |
| 2815 |
// see the comments of _rsaes_pkcs1_v1_5_decrypt() to understand why this is being done |
| 2816 |
if (defined('CRYPT_RSA_PKCS15_COMPAT') && (!isset($this->publicExponent) || $this->exponent !== $this->publicExponent)) { |
| 2817 |
$type = 1; |
| 2818 |
// "The padding string PS shall consist of k-3-||D|| octets. ... for block type 01, they shall have value FF" |
| 2819 |
$ps = str_repeat("\xFF", $psLen); |
| 2820 |
} |
| 2821 |
$em = chr(0) . chr($type) . $ps . chr(0) . $m; |
| 2822 |
|
| 2823 |
// RSA encryption |
| 2824 |
$m = $this->_os2ip($em); |
| 2825 |
$c = $this->_rsaep($m); |
| 2826 |
$c = $this->_i2osp($c, $this->k); |
| 2827 |
|
| 2828 |
// Output the ciphertext C |
| 2829 |
|
| 2830 |
return $c; |
| 2831 |
} |
| 2832 |
|
| 2833 |
/** |
| 2834 |
* RSAES-PKCS1-V1_5-DECRYPT |
| 2835 |
* |
| 2836 |
* See {@link http://tools.ietf.org/html/rfc3447#section-7.2.2 RFC3447#section-7.2.2}. |
| 2837 |
* |
| 2838 |
* For compatibility purposes, this function departs slightly from the description given in RFC3447. |
| 2839 |
* The reason being that RFC2313#section-8.1 (PKCS#1 v1.5) states that ciphertext's encrypted by the |
| 2840 |
* private key should have the second byte set to either 0 or 1 and that ciphertext's encrypted by the |
| 2841 |
* public key should have the second byte set to 2. In RFC3447 (PKCS#1 v2.1), the second byte is supposed |
| 2842 |
* to be 2 regardless of which key is used. For compatibility purposes, we'll just check to make sure the |
| 2843 |
* second byte is 2 or less. If it is, we'll accept the decrypted string as valid. |
| 2844 |
* |
| 2845 |
* As a consequence of this, a private key encrypted ciphertext produced with Crypt_RSA may not decrypt |
| 2846 |
* with a strictly PKCS#1 v1.5 compliant RSA implementation. Public key encrypted ciphertext's should but |
| 2847 |
* not private key encrypted ciphertext's. |
| 2848 |
* |
| 2849 |
* @access private |
| 2850 |
* @param string $c |
| 2851 |
* @return string |
| 2852 |
*/ |
| 2853 |
function _rsaes_pkcs1_v1_5_decrypt($c) |
| 2854 |
{ |
| 2855 |
// Length checking |
| 2856 |
|
| 2857 |
if (strlen($c) != $this->k) { // or if k < 11 |
| 2858 |
user_error('Decryption error'); |
| 2859 |
return false; |
| 2860 |
} |
| 2861 |
|
| 2862 |
// RSA decryption |
| 2863 |
|
| 2864 |
$c = $this->_os2ip($c); |
| 2865 |
$m = $this->_rsadp($c); |
| 2866 |
|
| 2867 |
if ($m === false) { |
| 2868 |
user_error('Decryption error'); |
| 2869 |
return false; |
| 2870 |
} |
| 2871 |
$em = $this->_i2osp($m, $this->k); |
| 2872 |
|
| 2873 |
// EME-PKCS1-v1_5 decoding |
| 2874 |
|
| 2875 |
if (ord($em[0]) != 0 || ord($em[1]) > 2) { |
| 2876 |
user_error('Decryption error'); |
| 2877 |
return false; |
| 2878 |
} |
| 2879 |
|
| 2880 |
$ps = substr($em, 2, strpos($em, chr(0), 2) - 2); |
| 2881 |
$m = substr($em, strlen($ps) + 3); |
| 2882 |
|
| 2883 |
if (strlen($ps) < 8) { |
| 2884 |
user_error('Decryption error'); |
| 2885 |
return false; |
| 2886 |
} |
| 2887 |
|
| 2888 |
// Output M |
| 2889 |
|
| 2890 |
return $m; |
| 2891 |
} |
| 2892 |
|
| 2893 |
/** |
| 2894 |
* EMSA-PSS-ENCODE |
| 2895 |
* |
| 2896 |
* See {@link http://tools.ietf.org/html/rfc3447#section-9.1.1 RFC3447#section-9.1.1}. |
| 2897 |
* |
| 2898 |
* @access private |
| 2899 |
* @param string $m |
| 2900 |
* @param int $emBits |
| 2901 |
*/ |
| 2902 |
function _emsa_pss_encode($m, $emBits) |
| 2903 |
{ |
| 2904 |
// if $m is larger than two million terrabytes and you're using sha1, PKCS#1 suggests a "Label too long" error |
| 2905 |
// be output. |
| 2906 |
|
| 2907 |
$emLen = ($emBits + 1) >> 3; // ie. ceil($emBits / 8) |
| 2908 |
$sLen = $this->sLen !== null ? $this->sLen : $this->hLen; |
| 2909 |
|
| 2910 |
$mHash = $this->hash->hash($m); |
| 2911 |
if ($emLen < $this->hLen + $sLen + 2) { |
| 2912 |
user_error('Encoding error'); |
| 2913 |
return false; |
| 2914 |
} |
| 2915 |
|
| 2916 |
$salt = crypt_random_string($sLen); |
| 2917 |
$m2 = "\0\0\0\0\0\0\0\0" . $mHash . $salt; |
| 2918 |
$h = $this->hash->hash($m2); |
| 2919 |
$ps = str_repeat(chr(0), $emLen - $sLen - $this->hLen - 2); |
| 2920 |
$db = $ps . chr(1) . $salt; |
| 2921 |
$dbMask = $this->_mgf1($h, $emLen - $this->hLen - 1); |
| 2922 |
$maskedDB = $db ^ $dbMask; |
| 2923 |
$maskedDB[0] = ~chr(256 - (1 << ($emBits & 7))) & $maskedDB[0]; |
| 2924 |
$em = $maskedDB . $h . chr(0xBC); |
| 2925 |
|
| 2926 |
return $em; |
| 2927 |
} |
| 2928 |
|
| 2929 |
/** |
| 2930 |
* EMSA-PSS-VERIFY |
| 2931 |
* |
| 2932 |
* See {@link http://tools.ietf.org/html/rfc3447#section-9.1.2 RFC3447#section-9.1.2}. |
| 2933 |
* |
| 2934 |
* @access private |
| 2935 |
* @param string $m |
| 2936 |
* @param string $em |
| 2937 |
* @param int $emBits |
| 2938 |
* @return string |
| 2939 |
*/ |
| 2940 |
function _emsa_pss_verify($m, $em, $emBits) |
| 2941 |
{ |
| 2942 |
// if $m is larger than two million terrabytes and you're using sha1, PKCS#1 suggests a "Label too long" error |
| 2943 |
// be output. |
| 2944 |
|
| 2945 |
$emLen = ($emBits + 7) >> 3; // ie. ceil($emBits / 8); |
| 2946 |
$sLen = $this->sLen !== null ? $this->sLen : $this->hLen; |
| 2947 |
|
| 2948 |
$mHash = $this->hash->hash($m); |
| 2949 |
if ($emLen < $this->hLen + $sLen + 2) { |
| 2950 |
return false; |
| 2951 |
} |
| 2952 |
|
| 2953 |
if ($em[strlen($em) - 1] != chr(0xBC)) { |
| 2954 |
return false; |
| 2955 |
} |
| 2956 |
|
| 2957 |
$maskedDB = substr($em, 0, -$this->hLen - 1); |
| 2958 |
$h = substr($em, -$this->hLen - 1, $this->hLen); |
| 2959 |
$temp = chr(256 - (1 << ($emBits & 7))); |
| 2960 |
if ((~$maskedDB[0] & $temp) != $temp) { |
| 2961 |
return false; |
| 2962 |
} |
| 2963 |
$dbMask = $this->_mgf1($h, $emLen - $this->hLen - 1); |
| 2964 |
$db = $maskedDB ^ $dbMask; |
| 2965 |
$db[0] = ~chr(256 - (1 << ($emBits & 7))) & $db[0]; |
| 2966 |
$temp = $emLen - $this->hLen - $sLen - 2; |
| 2967 |
if (substr($db, 0, $temp) != str_repeat(chr(0), $temp) || ord($db[$temp]) != 1) { |
| 2968 |
return false; |
| 2969 |
} |
| 2970 |
$salt = substr($db, $temp + 1); // should be $sLen long |
| 2971 |
$m2 = "\0\0\0\0\0\0\0\0" . $mHash . $salt; |
| 2972 |
$h2 = $this->hash->hash($m2); |
| 2973 |
return $this->_equals($h, $h2); |
| 2974 |
} |
| 2975 |
|
| 2976 |
/** |
| 2977 |
* RSASSA-PSS-SIGN |
| 2978 |
* |
| 2979 |
* See {@link http://tools.ietf.org/html/rfc3447#section-8.1.1 RFC3447#section-8.1.1}. |
| 2980 |
* |
| 2981 |
* @access private |
| 2982 |
* @param string $m |
| 2983 |
* @return string |
| 2984 |
*/ |
| 2985 |
function _rsassa_pss_sign($m) |
| 2986 |
{ |
| 2987 |
// EMSA-PSS encoding |
| 2988 |
|
| 2989 |
$em = $this->_emsa_pss_encode($m, 8 * $this->k - 1); |
| 2990 |
|
| 2991 |
// RSA signature |
| 2992 |
|
| 2993 |
$m = $this->_os2ip($em); |
| 2994 |
$s = $this->_rsasp1($m); |
| 2995 |
$s = $this->_i2osp($s, $this->k); |
| 2996 |
|
| 2997 |
// Output the signature S |
| 2998 |
|
| 2999 |
return $s; |
| 3000 |
} |
| 3001 |
|
| 3002 |
/** |
| 3003 |
* RSASSA-PSS-VERIFY |
| 3004 |
* |
| 3005 |
* See {@link http://tools.ietf.org/html/rfc3447#section-8.1.2 RFC3447#section-8.1.2}. |
| 3006 |
* |
| 3007 |
* @access private |
| 3008 |
* @param string $m |
| 3009 |
* @param string $s |
| 3010 |
* @return string |
| 3011 |
*/ |
| 3012 |
function _rsassa_pss_verify($m, $s) |
| 3013 |
{ |
| 3014 |
// Length checking |
| 3015 |
|
| 3016 |
if (strlen($s) != $this->k) { |
| 3017 |
user_error('Invalid signature'); |
| 3018 |
return false; |
| 3019 |
} |
| 3020 |
|
| 3021 |
// RSA verification |
| 3022 |
|
| 3023 |
$modBits = strlen($this->modulus->toBits()); |
| 3024 |
|
| 3025 |
$s2 = $this->_os2ip($s); |
| 3026 |
$m2 = $this->_rsavp1($s2); |
| 3027 |
if ($m2 === false) { |
| 3028 |
user_error('Invalid signature'); |
| 3029 |
return false; |
| 3030 |
} |
| 3031 |
$em = $this->_i2osp($m2, $this->k); |
| 3032 |
if ($em === false) { |
| 3033 |
user_error('Invalid signature'); |
| 3034 |
return false; |
| 3035 |
} |
| 3036 |
|
| 3037 |
// EMSA-PSS verification |
| 3038 |
|
| 3039 |
return $this->_emsa_pss_verify($m, $em, $modBits - 1); |
| 3040 |
} |
| 3041 |
|
| 3042 |
/** |
| 3043 |
* EMSA-PKCS1-V1_5-ENCODE |
| 3044 |
* |
| 3045 |
* See {@link http://tools.ietf.org/html/rfc3447#section-9.2 RFC3447#section-9.2}. |
| 3046 |
* |
| 3047 |
* @access private |
| 3048 |
* @param string $m |
| 3049 |
* @param int $emLen |
| 3050 |
* @return string |
| 3051 |
*/ |
| 3052 |
function _emsa_pkcs1_v1_5_encode($m, $emLen) |
| 3053 |
{ |
| 3054 |
$h = $this->hash->hash($m); |
| 3055 |
if ($h === false) { |
| 3056 |
return false; |
| 3057 |
} |
| 3058 |
|
| 3059 |
// see http://tools.ietf.org/html/rfc3447#page-43 |
| 3060 |
switch ($this->hashName) { |
| 3061 |
case 'md2': |
| 3062 |
$t = pack('H*', '3020300c06082a864886f70d020205000410'); |
| 3063 |
break; |
| 3064 |
case 'md5': |
| 3065 |
$t = pack('H*', '3020300c06082a864886f70d020505000410'); |
| 3066 |
break; |
| 3067 |
case 'sha1': |
| 3068 |
$t = pack('H*', '3021300906052b0e03021a05000414'); |
| 3069 |
break; |
| 3070 |
case 'sha256': |
| 3071 |
$t = pack('H*', '3031300d060960864801650304020105000420'); |
| 3072 |
break; |
| 3073 |
case 'sha384': |
| 3074 |
$t = pack('H*', '3041300d060960864801650304020205000430'); |
| 3075 |
break; |
| 3076 |
case 'sha512': |
| 3077 |
$t = pack('H*', '3051300d060960864801650304020305000440'); |
| 3078 |
} |
| 3079 |
$t.= $h; |
| 3080 |
$tLen = strlen($t); |
| 3081 |
|
| 3082 |
if ($emLen < $tLen + 11) { |
| 3083 |
user_error('Intended encoded message length too short'); |
| 3084 |
return false; |
| 3085 |
} |
| 3086 |
|
| 3087 |
$ps = str_repeat(chr(0xFF), $emLen - $tLen - 3); |
| 3088 |
|
| 3089 |
$em = "\0\1$ps\0$t"; |
| 3090 |
|
| 3091 |
return $em; |
| 3092 |
} |
| 3093 |
|
| 3094 |
/** |
| 3095 |
* EMSA-PKCS1-V1_5-ENCODE (without NULL) |
| 3096 |
* |
| 3097 |
* Quoting https://tools.ietf.org/html/rfc8017#page-65, |
| 3098 |
* |
| 3099 |
* "The parameters field associated with id-sha1, id-sha224, id-sha256, |
| 3100 |
* id-sha384, id-sha512, id-sha512/224, and id-sha512/256 should |
| 3101 |
* generally be omitted, but if present, it shall have a value of type |
| 3102 |
* NULL" |
| 3103 |
* |
| 3104 |
* @access private |
| 3105 |
* @param string $m |
| 3106 |
* @param int $emLen |
| 3107 |
* @return string |
| 3108 |
*/ |
| 3109 |
function _emsa_pkcs1_v1_5_encode_without_null($m, $emLen) |
| 3110 |
{ |
| 3111 |
$h = $this->hash->hash($m); |
| 3112 |
if ($h === false) { |
| 3113 |
return false; |
| 3114 |
} |
| 3115 |
|
| 3116 |
switch ($this->hashName) { |
| 3117 |
case 'sha1': |
| 3118 |
$t = pack('H*', '301f300706052b0e03021a0414'); |
| 3119 |
break; |
| 3120 |
case 'sha256': |
| 3121 |
$t = pack('H*', '302f300b06096086480165030402010420'); |
| 3122 |
break; |
| 3123 |
case 'sha384': |
| 3124 |
$t = pack('H*', '303f300b06096086480165030402020430'); |
| 3125 |
break; |
| 3126 |
case 'sha512': |
| 3127 |
$t = pack('H*', '304f300b06096086480165030402030440'); |
| 3128 |
break; |
| 3129 |
default: |
| 3130 |
return false; |
| 3131 |
} |
| 3132 |
$t.= $h; |
| 3133 |
$tLen = strlen($t); |
| 3134 |
|
| 3135 |
if ($emLen < $tLen + 11) { |
| 3136 |
user_error('Intended encoded message length too short'); |
| 3137 |
return false; |
| 3138 |
} |
| 3139 |
|
| 3140 |
$ps = str_repeat(chr(0xFF), $emLen - $tLen - 3); |
| 3141 |
|
| 3142 |
$em = "\0\1$ps\0$t"; |
| 3143 |
|
| 3144 |
return $em; |
| 3145 |
} |
| 3146 |
|
| 3147 |
/** |
| 3148 |
* RSASSA-PKCS1-V1_5-SIGN |
| 3149 |
* |
| 3150 |
* See {@link http://tools.ietf.org/html/rfc3447#section-8.2.1 RFC3447#section-8.2.1}. |
| 3151 |
* |
| 3152 |
* @access private |
| 3153 |
* @param string $m |
| 3154 |
* @return string |
| 3155 |
*/ |
| 3156 |
function _rsassa_pkcs1_v1_5_sign($m) |
| 3157 |
{ |
| 3158 |
// EMSA-PKCS1-v1_5 encoding |
| 3159 |
|
| 3160 |
$em = $this->_emsa_pkcs1_v1_5_encode($m, $this->k); |
| 3161 |
if ($em === false) { |
| 3162 |
user_error('RSA modulus too short'); |
| 3163 |
return false; |
| 3164 |
} |
| 3165 |
|
| 3166 |
// RSA signature |
| 3167 |
|
| 3168 |
$m = $this->_os2ip($em); |
| 3169 |
$s = $this->_rsasp1($m); |
| 3170 |
$s = $this->_i2osp($s, $this->k); |
| 3171 |
|
| 3172 |
// Output the signature S |
| 3173 |
|
| 3174 |
return $s; |
| 3175 |
} |
| 3176 |
|
| 3177 |
/** |
| 3178 |
* RSASSA-PKCS1-V1_5-VERIFY |
| 3179 |
* |
| 3180 |
* See {@link http://tools.ietf.org/html/rfc3447#section-8.2.2 RFC3447#section-8.2.2}. |
| 3181 |
* |
| 3182 |
* @access private |
| 3183 |
* @param string $m |
| 3184 |
* @param string $s |
| 3185 |
* @return string |
| 3186 |
*/ |
| 3187 |
function _rsassa_pkcs1_v1_5_verify($m, $s) |
| 3188 |
{ |
| 3189 |
// Length checking |
| 3190 |
|
| 3191 |
if (strlen($s) != $this->k) { |
| 3192 |
user_error('Invalid signature'); |
| 3193 |
return false; |
| 3194 |
} |
| 3195 |
|
| 3196 |
// RSA verification |
| 3197 |
|
| 3198 |
$s = $this->_os2ip($s); |
| 3199 |
$m2 = $this->_rsavp1($s); |
| 3200 |
if ($m2 === false) { |
| 3201 |
user_error('Invalid signature'); |
| 3202 |
return false; |
| 3203 |
} |
| 3204 |
$em = $this->_i2osp($m2, $this->k); |
| 3205 |
if ($em === false) { |
| 3206 |
user_error('Invalid signature'); |
| 3207 |
return false; |
| 3208 |
} |
| 3209 |
|
| 3210 |
// EMSA-PKCS1-v1_5 encoding |
| 3211 |
|
| 3212 |
$em2 = $this->_emsa_pkcs1_v1_5_encode($m, $this->k); |
| 3213 |
$em3 = $this->_emsa_pkcs1_v1_5_encode_without_null($m, $this->k); |
| 3214 |
|
| 3215 |
if ($em2 === false && $em3 === false) { |
| 3216 |
user_error('RSA modulus too short'); |
| 3217 |
return false; |
| 3218 |
} |
| 3219 |
|
| 3220 |
// Compare |
| 3221 |
|
| 3222 |
return ($em2 !== false && $this->_equals($em, $em2)) || |
| 3223 |
($em3 !== false && $this->_equals($em, $em3)); |
| 3224 |
} |
| 3225 |
|
| 3226 |
/** |
| 3227 |
* Set Encryption Mode |
| 3228 |
* |
| 3229 |
* Valid values include CRYPT_RSA_ENCRYPTION_OAEP and CRYPT_RSA_ENCRYPTION_PKCS1. |
| 3230 |
* |
| 3231 |
* @access public |
| 3232 |
* @param int $mode |
| 3233 |
*/ |
| 3234 |
function setEncryptionMode($mode) |
| 3235 |
{ |
| 3236 |
$this->encryptionMode = $mode; |
| 3237 |
} |
| 3238 |
|
| 3239 |
/** |
| 3240 |
* Set Signature Mode |
| 3241 |
* |
| 3242 |
* Valid values include CRYPT_RSA_SIGNATURE_PSS and CRYPT_RSA_SIGNATURE_PKCS1 |
| 3243 |
* |
| 3244 |
* @access public |
| 3245 |
* @param int $mode |
| 3246 |
*/ |
| 3247 |
function setSignatureMode($mode) |
| 3248 |
{ |
| 3249 |
$this->signatureMode = $mode; |
| 3250 |
} |
| 3251 |
|
| 3252 |
/** |
| 3253 |
* Set public key comment. |
| 3254 |
* |
| 3255 |
* @access public |
| 3256 |
* @param string $comment |
| 3257 |
*/ |
| 3258 |
function setComment($comment) |
| 3259 |
{ |
| 3260 |
$this->comment = $comment; |
| 3261 |
} |
| 3262 |
|
| 3263 |
/** |
| 3264 |
* Get public key comment. |
| 3265 |
* |
| 3266 |
* @access public |
| 3267 |
* @return string |
| 3268 |
*/ |
| 3269 |
function getComment() |
| 3270 |
{ |
| 3271 |
return $this->comment; |
| 3272 |
} |
| 3273 |
|
| 3274 |
/** |
| 3275 |
* Encryption |
| 3276 |
* |
| 3277 |
* Both CRYPT_RSA_ENCRYPTION_OAEP and CRYPT_RSA_ENCRYPTION_PKCS1 both place limits on how long $plaintext can be. |
| 3278 |
* If $plaintext exceeds those limits it will be broken up so that it does and the resultant ciphertext's will |
| 3279 |
* be concatenated together. |
| 3280 |
* |
| 3281 |
* @see self::decrypt() |
| 3282 |
* @access public |
| 3283 |
* @param string $plaintext |
| 3284 |
* @return string |
| 3285 |
*/ |
| 3286 |
function encrypt($plaintext) |
| 3287 |
{ |
| 3288 |
switch ($this->encryptionMode) { |
| 3289 |
case CRYPT_RSA_ENCRYPTION_NONE: |
| 3290 |
$plaintext = str_split($plaintext, $this->k); |
| 3291 |
$ciphertext = ''; |
| 3292 |
foreach ($plaintext as $m) { |
| 3293 |
$ciphertext.= $this->_raw_encrypt($m); |
| 3294 |
} |
| 3295 |
return $ciphertext; |
| 3296 |
case CRYPT_RSA_ENCRYPTION_PKCS1: |
| 3297 |
$length = $this->k - 11; |
| 3298 |
if ($length <= 0) { |
| 3299 |
return false; |
| 3300 |
} |
| 3301 |
|
| 3302 |
$plaintext = str_split($plaintext, $length); |
| 3303 |
$ciphertext = ''; |
| 3304 |
foreach ($plaintext as $m) { |
| 3305 |
$ciphertext.= $this->_rsaes_pkcs1_v1_5_encrypt($m); |
| 3306 |
} |
| 3307 |
return $ciphertext; |
| 3308 |
//case CRYPT_RSA_ENCRYPTION_OAEP: |
| 3309 |
default: |
| 3310 |
$length = $this->k - 2 * $this->hLen - 2; |
| 3311 |
if ($length <= 0) { |
| 3312 |
return false; |
| 3313 |
} |
| 3314 |
|
| 3315 |
$plaintext = str_split($plaintext, $length); |
| 3316 |
$ciphertext = ''; |
| 3317 |
foreach ($plaintext as $m) { |
| 3318 |
$ciphertext.= $this->_rsaes_oaep_encrypt($m); |
| 3319 |
} |
| 3320 |
return $ciphertext; |
| 3321 |
} |
| 3322 |
} |
| 3323 |
|
| 3324 |
/** |
| 3325 |
* Decryption |
| 3326 |
* |
| 3327 |
* @see self::encrypt() |
| 3328 |
* @access public |
| 3329 |
* @param string $ciphertext |
| 3330 |
* @return string |
| 3331 |
*/ |
| 3332 |
function decrypt($ciphertext) |
| 3333 |
{ |
| 3334 |
if ($this->k <= 0) { |
| 3335 |
return false; |
| 3336 |
} |
| 3337 |
|
| 3338 |
$ciphertext = str_split($ciphertext, $this->k); |
| 3339 |
$ciphertext[count($ciphertext) - 1] = str_pad($ciphertext[count($ciphertext) - 1], $this->k, chr(0), STR_PAD_LEFT); |
| 3340 |
|
| 3341 |
$plaintext = ''; |
| 3342 |
|
| 3343 |
switch ($this->encryptionMode) { |
| 3344 |
case CRYPT_RSA_ENCRYPTION_NONE: |
| 3345 |
$decrypt = '_raw_encrypt'; |
| 3346 |
break; |
| 3347 |
case CRYPT_RSA_ENCRYPTION_PKCS1: |
| 3348 |
$decrypt = '_rsaes_pkcs1_v1_5_decrypt'; |
| 3349 |
break; |
| 3350 |
//case CRYPT_RSA_ENCRYPTION_OAEP: |
| 3351 |
default: |
| 3352 |
$decrypt = '_rsaes_oaep_decrypt'; |
| 3353 |
} |
| 3354 |
|
| 3355 |
foreach ($ciphertext as $c) { |
| 3356 |
$temp = $this->$decrypt($c); |
| 3357 |
if ($temp === false) { |
| 3358 |
return false; |
| 3359 |
} |
| 3360 |
$plaintext.= $temp; |
| 3361 |
} |
| 3362 |
|
| 3363 |
return $plaintext; |
| 3364 |
} |
| 3365 |
|
| 3366 |
/** |
| 3367 |
* Create a signature |
| 3368 |
* |
| 3369 |
* @see self::verify() |
| 3370 |
* @access public |
| 3371 |
* @param string $message |
| 3372 |
* @return string |
| 3373 |
*/ |
| 3374 |
function sign($message) |
| 3375 |
{ |
| 3376 |
if (empty($this->modulus) || empty($this->exponent)) { |
| 3377 |
return false; |
| 3378 |
} |
| 3379 |
|
| 3380 |
switch ($this->signatureMode) { |
| 3381 |
case CRYPT_RSA_SIGNATURE_PKCS1: |
| 3382 |
return $this->_rsassa_pkcs1_v1_5_sign($message); |
| 3383 |
//case CRYPT_RSA_SIGNATURE_PSS: |
| 3384 |
default: |
| 3385 |
return $this->_rsassa_pss_sign($message); |
| 3386 |
} |
| 3387 |
} |
| 3388 |
|
| 3389 |
/** |
| 3390 |
* Verifies a signature |
| 3391 |
* |
| 3392 |
* @see self::sign() |
| 3393 |
* @access public |
| 3394 |
* @param string $message |
| 3395 |
* @param string $signature |
| 3396 |
* @return bool |
| 3397 |
*/ |
| 3398 |
function verify($message, $signature) |
| 3399 |
{ |
| 3400 |
if (empty($this->modulus) || empty($this->exponent)) { |
| 3401 |
return false; |
| 3402 |
} |
| 3403 |
|
| 3404 |
switch ($this->signatureMode) { |
| 3405 |
case CRYPT_RSA_SIGNATURE_PKCS1: |
| 3406 |
return $this->_rsassa_pkcs1_v1_5_verify($message, $signature); |
| 3407 |
//case CRYPT_RSA_SIGNATURE_PSS: |
| 3408 |
default: |
| 3409 |
return $this->_rsassa_pss_verify($message, $signature); |
| 3410 |
} |
| 3411 |
} |
| 3412 |
|
| 3413 |
/** |
| 3414 |
* Extract raw BER from Base64 encoding |
| 3415 |
* |
| 3416 |
* @access private |
| 3417 |
* @param string $str |
| 3418 |
* @return string |
| 3419 |
*/ |
| 3420 |
function _extractBER($str) |
| 3421 |
{ |
| 3422 |
/* X.509 certs are assumed to be base64 encoded but sometimes they'll have additional things in them |
| 3423 |
* above and beyond the ceritificate. |
| 3424 |
* ie. some may have the following preceding the -----BEGIN CERTIFICATE----- line: |
| 3425 |
* |
| 3426 |
* Bag Attributes |
| 3427 |
* localKeyID: 01 00 00 00 |
| 3428 |
* subject=/O=organization/OU=org unit/CN=common name |
| 3429 |
* issuer=/O=organization/CN=common name |
| 3430 |
*/ |
| 3431 |
$temp = preg_replace('#.*?^-+[^-]+-+[\r\n ]*$#ms', '', $str, 1); |
| 3432 |
// remove the -----BEGIN CERTIFICATE----- and -----END CERTIFICATE----- stuff |
| 3433 |
$temp = preg_replace('#-+[^-]+-+#', '', $temp); |
| 3434 |
// remove new lines |
| 3435 |
$temp = str_replace(array("\r", "\n", ' '), '', $temp); |
| 3436 |
$temp = preg_match('#^[a-zA-Z\d/+]*={0,2}$#', $temp) ? base64_decode($temp) : false; |
| 3437 |
return $temp != false ? $temp : $str; |
| 3438 |
} |
| 3439 |
} |
| 3440 |
|
