Bacon /
BaconPdf
| @@ 268-289 (lines=22) @@ | ||
| 265 | * @param int $keyLength |
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| 266 | * @return string |
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| 267 | */ |
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| 268 | private function computeOwnerEntry($ownerPassword, $userPassword, $revision, $keyLength) |
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| 269 | { |
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| 270 | $hash = hex2bin(md5(substr($ownerPassword . self::ENCRYPTION_PADDING, 0, 32))); |
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| 271 | ||
| 272 | if ($revision >= 3) { |
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| 273 | for ($i = 0; $i < 50; ++$i) { |
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| 274 | $hash = hex2bin(md5($hash)); |
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| 275 | } |
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| 276 | ||
| 277 | $key = substr($hash, 0, $keyLength); |
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| 278 | } else { |
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| 279 | $key = substr($hash, 0, 5); |
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| 280 | } |
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| 281 | ||
| 282 | $value = openssl_encrypt(substr($userPassword . self::ENCRYPTION_PADDING, 0, 32), 'rc-4', $key); |
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| 283 | ||
| 284 | if ($revision >= 3) { |
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| 285 | $value = self::applyRc4Loop($value, $key, $keyLength); |
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| 286 | } |
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| 287 | ||
| 288 | return $value; |
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| 289 | } |
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| 290 | ||
| 291 | /** |
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| 292 | * Computes the user entry (rev 2) as defined by algorithm 3.4 in 3.5.2. |
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| @@ 77-98 (lines=22) @@ | ||
| 74 | * @param int $keyLength |
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| 75 | * @return string |
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| 76 | */ |
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| 77 | public static function computeOwnerEntry($ownerPassword, $userPassword, $revision, $keyLength) |
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| 78 | { |
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| 79 | $hash = hex2bin(md5(substr($ownerPassword . self::ENCRYPTION_PADDING, 0, 32))); |
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| 80 | ||
| 81 | if ($revision >= 3) { |
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| 82 | for ($i = 0; $i < 50; ++$i) { |
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| 83 | $hash = hex2bin(md5($hash)); |
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| 84 | } |
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| 85 | ||
| 86 | $key = substr($hash, 0, $keyLength); |
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| 87 | } else { |
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| 88 | $key = substr($hash, 0, 5); |
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| 89 | } |
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| 90 | ||
| 91 | $value = self::rc4($key, substr($userPassword . self::ENCRYPTION_PADDING, 0, 32)); |
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| 92 | ||
| 93 | if ($revision >= 3) { |
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| 94 | $value = self::applyRc4Loop($value, $key, $keyLength); |
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| 95 | } |
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| 96 | ||
| 97 | return $value; |
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| 98 | } |
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| 99 | ||
| 100 | /** |
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| 101 | * Computes the user entry (rev 2) as defined by algorithm 3.4 in 3.5.2. |
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