diff options
author | Anton Luka Šijanec <anton@sijanec.eu> | 2024-05-27 13:08:29 +0200 |
---|---|---|
committer | Anton Luka Šijanec <anton@sijanec.eu> | 2024-05-27 13:08:29 +0200 |
commit | 75160b12821f7f4299cce7f0b69c83c1502ae071 (patch) | |
tree | 27e25e4ccaef45f0c58b22831164050d1af1d4db /vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/PasswordHasher.php | |
parent | prvi-commit (diff) | |
download | 1ka-75160b12821f7f4299cce7f0b69c83c1502ae071.tar 1ka-75160b12821f7f4299cce7f0b69c83c1502ae071.tar.gz 1ka-75160b12821f7f4299cce7f0b69c83c1502ae071.tar.bz2 1ka-75160b12821f7f4299cce7f0b69c83c1502ae071.tar.lz 1ka-75160b12821f7f4299cce7f0b69c83c1502ae071.tar.xz 1ka-75160b12821f7f4299cce7f0b69c83c1502ae071.tar.zst 1ka-75160b12821f7f4299cce7f0b69c83c1502ae071.zip |
Diffstat (limited to '')
-rw-r--r-- | vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/PasswordHasher.php | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/PasswordHasher.php b/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/PasswordHasher.php new file mode 100644 index 0000000..894503e --- /dev/null +++ b/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/PasswordHasher.php @@ -0,0 +1,100 @@ +<?php
+
+namespace PhpOffice\PhpSpreadsheet\Shared;
+
+use PhpOffice\PhpSpreadsheet\Exception;
+use PhpOffice\PhpSpreadsheet\Worksheet\Protection;
+
+class PasswordHasher
+{
+ /**
+ * Get algorithm name for PHP.
+ */
+ private static function getAlgorithm(string $algorithmName): string
+ {
+ if (!$algorithmName) {
+ return '';
+ }
+
+ // Mapping between algorithm name in Excel and algorithm name in PHP
+ $mapping = [
+ Protection::ALGORITHM_MD2 => 'md2',
+ Protection::ALGORITHM_MD4 => 'md4',
+ Protection::ALGORITHM_MD5 => 'md5',
+ Protection::ALGORITHM_SHA_1 => 'sha1',
+ Protection::ALGORITHM_SHA_256 => 'sha256',
+ Protection::ALGORITHM_SHA_384 => 'sha384',
+ Protection::ALGORITHM_SHA_512 => 'sha512',
+ Protection::ALGORITHM_RIPEMD_128 => 'ripemd128',
+ Protection::ALGORITHM_RIPEMD_160 => 'ripemd160',
+ Protection::ALGORITHM_WHIRLPOOL => 'whirlpool',
+ ];
+
+ if (array_key_exists($algorithmName, $mapping)) {
+ return $mapping[$algorithmName];
+ }
+
+ throw new Exception('Unsupported password algorithm: ' . $algorithmName);
+ }
+
+ /**
+ * Create a password hash from a given string.
+ *
+ * This method is based on the algorithm provided by
+ * Daniel Rentz of OpenOffice and the PEAR package
+ * Spreadsheet_Excel_Writer by Xavier Noguer <xnoguer@rezebra.com>.
+ *
+ * @param string $pPassword Password to hash
+ */
+ private static function defaultHashPassword(string $pPassword): string
+ {
+ $password = 0x0000;
+ $charPos = 1; // char position
+
+ // split the plain text password in its component characters
+ $chars = preg_split('//', $pPassword, -1, PREG_SPLIT_NO_EMPTY);
+ foreach ($chars as $char) {
+ $value = ord($char) << $charPos++; // shifted ASCII value
+ $rotated_bits = $value >> 15; // rotated bits beyond bit 15
+ $value &= 0x7fff; // first 15 bits
+ $password ^= ($value | $rotated_bits);
+ }
+
+ $password ^= strlen($pPassword);
+ $password ^= 0xCE4B;
+
+ return strtoupper(dechex($password));
+ }
+
+ /**
+ * Create a password hash from a given string by a specific algorithm.
+ *
+ * 2.4.2.4 ISO Write Protection Method
+ *
+ * @see https://docs.microsoft.com/en-us/openspecs/office_file_formats/ms-offcrypto/1357ea58-646e-4483-92ef-95d718079d6f
+ *
+ * @param string $password Password to hash
+ * @param string $algorithm Hash algorithm used to compute the password hash value
+ * @param string $salt Pseudorandom string
+ * @param int $spinCount Number of times to iterate on a hash of a password
+ *
+ * @return string Hashed password
+ */
+ public static function hashPassword(string $password, string $algorithm = '', string $salt = '', int $spinCount = 10000): string
+ {
+ $phpAlgorithm = self::getAlgorithm($algorithm);
+ if (!$phpAlgorithm) {
+ return self::defaultHashPassword($password);
+ }
+
+ $saltValue = base64_decode($salt);
+ $encodedPassword = mb_convert_encoding($password, 'UCS-2LE', 'UTF-8');
+
+ $hashValue = hash($phpAlgorithm, $saltValue . $encodedPassword, true);
+ for ($i = 0; $i < $spinCount; ++$i) {
+ $hashValue = hash($phpAlgorithm, $hashValue . pack('L', $i), true);
+ }
+
+ return base64_encode($hashValue);
+ }
+}
|