Password and hash are exclusive
As specified in https://docs.microsoft.com/en-us/openspecs/office_standards/ms-xlsx/85f5567f-2599-41ad-ae26-8cfab23ce754 password and hashValue are exlusive and thus should be treated transparently with a single API in our model.
This commit is contained in:
Adrien Crivelli
parent
1eaf40be69
commit
b9a59660d0
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@ -919,29 +919,53 @@ disallow inserting rows on a specific sheet, disallow sorting, ...
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- Cell: offers the option to lock/unlock a cell as well as show/hide
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the internal formula.
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**Make sure you enable worksheet protection if you need any of the
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worksheet or cell protection features!** This can be done using the following
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code:
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``` php
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$spreadsheet->getActiveSheet()->getProtection()->setSheet(true);
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```
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### Document
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An example on setting document security:
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``` php
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$spreadsheet->getSecurity()->setLockWindows(true);
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$spreadsheet->getSecurity()->setLockStructure(true);
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$spreadsheet->getSecurity()->setWorkbookPassword("PhpSpreadsheet");
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$security = $spreadsheet->getSecurity();
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$security->setLockWindows(true);
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$security->setLockStructure(true);
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$security->setWorkbookPassword("PhpSpreadsheet");
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```
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### Worksheet
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An example on setting worksheet security:
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``` php
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$spreadsheet->getActiveSheet()
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->getProtection()->setPassword('PhpSpreadsheet');
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$spreadsheet->getActiveSheet()
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->getProtection()->setSheet(true);
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$spreadsheet->getActiveSheet()
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->getProtection()->setSort(true);
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$spreadsheet->getActiveSheet()
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->getProtection()->setInsertRows(true);
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$spreadsheet->getActiveSheet()
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->getProtection()->setFormatCells(true);
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$protection = $spreadsheet->getActiveSheet()->getProtection();
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$protection->setPassword('PhpSpreadsheet');
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$protection->setSheet(true);
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$protection->setSort(true);
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$protection->setInsertRows(true);
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$protection->setFormatCells(true);
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```
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If writing Xlsx files you can specify the algorithm used to hash the password
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before calling `setPassword()` like so:
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```php
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$protection = $spreadsheet->getActiveSheet()->getProtection();
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$protection->setAlgorithm(Protection::ALGORITHM_SHA_512);
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$protection->setSpinCount(20000);
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$protection->setPassword('PhpSpreadsheet');
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```
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The salt should **not** be set manually and will be automatically generated
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when setting a new password.
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### Cell
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An example on setting cell security:
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``` php
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@ -950,14 +974,30 @@ $spreadsheet->getActiveSheet()->getStyle('B1')
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->setLocked(\PhpOffice\PhpSpreadsheet\Style\Protection::PROTECTION_UNPROTECTED);
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```
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**Make sure you enable worksheet protection if you need any of the
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worksheet protection features!** This can be done using the following
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code:
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## Reading protected spreadsheet
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Spreadsheets that are protected the as described above can always be read by
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PhpSpreadsheet. There is no need to know the password or do anything special in
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order to read a protected file.
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However if you need to implement a password verification mechanism, you can use the
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following helper method:
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```php
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$spreadsheet->getActiveSheet()->getProtection()->setSheet(true);
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$protection = $spreadsheet->getActiveSheet()->getProtection();
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$allowed = $protection->verify('my password');
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if ($allowed) {
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doSomething();
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} else {
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throw new Exception('Incorrect password');
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}
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```
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If you need to completely prevent reading a file by any tool, including PhpSpreadsheet,
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then you are looking for "encryption", not "protection".
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## Setting data validation on a cell
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Data validation is a powerful feature of Xlsx. It allows to specify an
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@ -763,17 +763,8 @@ class Xlsx extends BaseReader
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}
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}
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if (!$this->readDataOnly && $xmlSheet && $xmlSheet->sheetProtection) {
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$docSheet->getProtection()->setPassword((string) $xmlSheet->sheetProtection['password'], true);
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$docSheet->getProtection()->setAlgorithmName((string) $xmlSheet->sheetProtection['algorithmName']);
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$docSheet->getProtection()->setHashValue((string) $xmlSheet->sheetProtection['hashValue']);
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$docSheet->getProtection()->setSaltValue((string) $xmlSheet->sheetProtection['saltValue']);
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$docSheet->getProtection()->setSpinCount((int) $xmlSheet->sheetProtection['spinCount']);
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if ($xmlSheet->protectedRanges->protectedRange) {
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foreach ($xmlSheet->protectedRanges->protectedRange as $protectedRange) {
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$docSheet->protectCells((string) $protectedRange['sqref'], (string) $protectedRange['password'], true);
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}
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}
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if ($xmlSheet) {
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$this->readSheetProtection($docSheet, $xmlSheet);
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}
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if ($xmlSheet && $xmlSheet->autoFilter && !$this->readDataOnly) {
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@ -2035,4 +2026,29 @@ class Xlsx extends BaseReader
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return $workbookBasename;
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}
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private function readSheetProtection(Worksheet $docSheet, SimpleXMLElement $xmlSheet): void
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{
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if ($this->readDataOnly || !$xmlSheet->sheetProtection) {
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return;
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}
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$algorithmName = (string) $xmlSheet->sheetProtection['algorithmName'];
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$protection = $docSheet->getProtection();
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$protection->setAlgorithm($algorithmName);
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if ($algorithmName) {
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$protection->setPassword((string) $xmlSheet->sheetProtection['hashValue'], true);
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$protection->setSalt((string) $xmlSheet->sheetProtection['saltValue']);
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$protection->setSpinCount((int) $xmlSheet->sheetProtection['spinCount']);
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} else {
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$protection->setPassword((string) $xmlSheet->sheetProtection['password'], true);
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}
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if ($xmlSheet->protectedRanges->protectedRange) {
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foreach ($xmlSheet->protectedRanges->protectedRange as $protectedRange) {
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$docSheet->protectCells((string) $protectedRange['sqref'], (string) $protectedRange['password'], true);
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}
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}
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}
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}
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@ -2,51 +2,39 @@
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namespace PhpOffice\PhpSpreadsheet\Shared;
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use PhpOffice\PhpSpreadsheet\Exception;
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use PhpOffice\PhpSpreadsheet\Worksheet\Protection;
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class PasswordHasher
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{
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const ALGORITHM_MD2 = 'MD2';
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const ALGORITHM_MD4 = 'MD4';
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const ALGORITHM_MD5 = 'MD5';
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const ALGORITHM_SHA_1 = 'SHA-1';
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const ALGORITHM_SHA_256 = 'SHA-256';
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const ALGORITHM_SHA_384 = 'SHA-384';
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const ALGORITHM_SHA_512 = 'SHA-512';
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const ALGORITHM_RIPEMD_128 = 'RIPEMD-128';
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const ALGORITHM_RIPEMD_160 = 'RIPEMD-160';
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const ALGORITHM_WHIRLPOOL = 'WHIRLPOOL';
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/**
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* Mapping between algorithm name in Excel and algorithm name in PHP.
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*
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* @var array
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* Get algorithm name for PHP.
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*/
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private static $algorithmArray = [
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self::ALGORITHM_MD2 => 'md2',
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self::ALGORITHM_MD4 => 'md4',
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self::ALGORITHM_MD5 => 'md5',
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self::ALGORITHM_SHA_1 => 'sha1',
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self::ALGORITHM_SHA_256 => 'sha256',
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self::ALGORITHM_SHA_384 => 'sha384',
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self::ALGORITHM_SHA_512 => 'sha512',
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self::ALGORITHM_RIPEMD_128 => 'ripemd128',
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self::ALGORITHM_RIPEMD_160 => 'ripemd160',
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self::ALGORITHM_WHIRLPOOL => 'whirlpool',
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];
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/**
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* Get algorithm from self::$algorithmArray.
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*
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* @param string $pAlgorithmName
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*
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* @return string
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*/
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private static function getAlgorithm($pAlgorithmName)
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private static function getAlgorithm(string $algorithmName): string
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{
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if (array_key_exists($pAlgorithmName, self::$algorithmArray)) {
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return self::$algorithmArray[$pAlgorithmName];
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if (!$algorithmName) {
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return '';
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}
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return '';
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// Mapping between algorithm name in Excel and algorithm name in PHP
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$mapping = [
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Protection::ALGORITHM_MD2 => 'md2',
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Protection::ALGORITHM_MD4 => 'md4',
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Protection::ALGORITHM_MD5 => 'md5',
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Protection::ALGORITHM_SHA_1 => 'sha1',
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Protection::ALGORITHM_SHA_256 => 'sha256',
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Protection::ALGORITHM_SHA_384 => 'sha384',
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Protection::ALGORITHM_SHA_512 => 'sha512',
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Protection::ALGORITHM_RIPEMD_128 => 'ripemd128',
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Protection::ALGORITHM_RIPEMD_160 => 'ripemd160',
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Protection::ALGORITHM_WHIRLPOOL => 'whirlpool',
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];
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if (array_key_exists($algorithmName, $mapping)) {
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return $mapping[$algorithmName];
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}
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throw new Exception('Unsupported password algorithm: ' . $algorithmName);
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}
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/**
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@ -57,10 +45,8 @@ class PasswordHasher
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* Spreadsheet_Excel_Writer by Xavier Noguer <xnoguer@rezebra.com>.
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*
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* @param string $pPassword Password to hash
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*
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* @return string Hashed password
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*/
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public static function defaultHashPassword($pPassword)
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private static function defaultHashPassword(string $pPassword): string
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{
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$password = 0x0000;
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$charPos = 1; // char position
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@ -87,40 +73,28 @@ class PasswordHasher
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*
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* @see https://docs.microsoft.com/en-us/openspecs/office_file_formats/ms-offcrypto/1357ea58-646e-4483-92ef-95d718079d6f
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*
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* @param string $pPassword Password to hash
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* @param string $pAlgorithmName Hash algorithm used to compute the password hash value
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* @param string $pSaltValue Pseudorandom string
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* @param string $pSpinCount Number of times to iterate on a hash of a password
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* @param string $password Password to hash
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* @param string $algorithm Hash algorithm used to compute the password hash value
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* @param string $salt Pseudorandom string
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* @param int $spinCount Number of times to iterate on a hash of a password
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*
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* @return string Hashed password
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*/
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public static function hashPassword($pPassword, $pAlgorithmName = '', $pSaltValue = '', $pSpinCount = 10000)
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public static function hashPassword(string $password, string $algorithm = '', string $salt = '', int $spinCount = 10000): string
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{
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$algorithmName = self::getAlgorithm($pAlgorithmName);
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if (!$pAlgorithmName) {
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return self::defaultHashPassword($pPassword);
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$phpAlgorithm = self::getAlgorithm($algorithm);
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if (!$phpAlgorithm) {
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return self::defaultHashPassword($password);
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}
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$saltValue = base64_decode($pSaltValue);
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$password = mb_convert_encoding($pPassword, 'UCS-2LE', 'UTF-8');
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$saltValue = base64_decode($salt);
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$encodedPassword = mb_convert_encoding($password, 'UCS-2LE', 'UTF-8');
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$hashValue = hash($algorithmName, $saltValue . $password, true);
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for ($i = 0; $i < $pSpinCount; ++$i) {
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$hashValue = hash($algorithmName, $hashValue . pack('L', $i), true);
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$hashValue = hash($phpAlgorithm, $saltValue . $encodedPassword, true);
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for ($i = 0; $i < $spinCount; ++$i) {
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$hashValue = hash($phpAlgorithm, $hashValue . pack('L', $i), true);
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}
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return base64_encode($hashValue);
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}
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/**
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* Create a pseudorandom string.
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*
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* @param int $pSize Length of the output string in bytes
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*
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* @return string Pseudorandom string
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*/
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public static function generateSalt($pSize = 16)
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{
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return base64_encode(random_bytes($pSize));
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}
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}
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@ -6,6 +6,17 @@ use PhpOffice\PhpSpreadsheet\Shared\PasswordHasher;
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class Protection
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{
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const ALGORITHM_MD2 = 'MD2';
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const ALGORITHM_MD4 = 'MD4';
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const ALGORITHM_MD5 = 'MD5';
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const ALGORITHM_SHA_1 = 'SHA-1';
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const ALGORITHM_SHA_256 = 'SHA-256';
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const ALGORITHM_SHA_384 = 'SHA-384';
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const ALGORITHM_SHA_512 = 'SHA-512';
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const ALGORITHM_RIPEMD_128 = 'RIPEMD-128';
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const ALGORITHM_RIPEMD_160 = 'RIPEMD-160';
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const ALGORITHM_WHIRLPOOL = 'WHIRLPOOL';
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/**
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* Sheet.
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*
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@ -119,7 +130,7 @@ class Protection
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private $selectUnlockedCells = false;
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/**
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* Password.
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* Hashed password.
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*
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* @var string
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*/
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@ -130,28 +141,28 @@ class Protection
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*
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* @var string
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*/
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private $algorithmName = '';
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private $algorithm = '';
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/**
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* Hash value.
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*
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* @var string
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*/
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private $hashValue = '';
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private $hash = '';
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/**
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* Salt value.
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*
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* @var string
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*/
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private $saltValue = '';
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private $salt = '';
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/**
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* Spin count.
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*
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* @var int
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*/
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private $spinCount = '';
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private $spinCount = 10000;
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/**
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* Create a new Protection.
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@ -570,7 +581,7 @@ class Protection
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}
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/**
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* Get Password (hashed).
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* Get hashed password.
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*
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* @return string
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*/
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@ -590,107 +601,84 @@ class Protection
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public function setPassword($pValue, $pAlreadyHashed = false)
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{
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if (!$pAlreadyHashed) {
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$pValue = PasswordHasher::hashPassword($pValue);
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$salt = $this->generateSalt();
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$this->setSalt($salt);
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$pValue = PasswordHasher::hashPassword($pValue, $this->getAlgorithm(), $this->getSalt(), $this->getSpinCount());
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}
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$this->password = $pValue;
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return $this;
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}
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/**
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* Get AlgorithmName.
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*
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* @return string
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* Create a pseudorandom string.
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*/
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public function getAlgorithmName()
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private function generateSalt(): string
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{
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return $this->algorithmName;
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return base64_encode(random_bytes(16));
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}
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/**
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* Set AlgorithmName.
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*
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* @param string $pValue
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*
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* @return $this
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* Get algorithm name.
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*/
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public function setAlgorithmName($pValue)
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public function getAlgorithm(): string
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{
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$this->algorithmName = $pValue;
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return $this;
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return $this->algorithm;
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}
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/**
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* Get HashValue.
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*
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* @return string
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* Set algorithm name.
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*/
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public function getHashValue()
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public function setAlgorithm(string $algorithm): void
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{
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return $this->hashValue;
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$this->algorithm = $algorithm;
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}
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/**
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* Set HashValue.
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*
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* @param string $pValue
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*
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* @return $this
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* Get salt value.
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*/
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public function setHashValue($pValue)
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public function getSalt(): string
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{
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$this->hashValue = $pValue;
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return $this;
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return $this->salt;
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}
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/**
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* Get SaltValue.
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*
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* @return string
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* Set salt value.
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*/
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public function getSaltValue()
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public function setSalt(string $salt): void
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{
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return $this->saltValue;
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$this->salt = $salt;
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}
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/**
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* Set SaltValue.
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*
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* @param string $pValue
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*
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* @return $this
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* Get spin count.
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*/
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public function setSaltValue($pValue)
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{
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$this->saltValue = $pValue;
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return $this;
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}
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/**
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* Get SpinCount.
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*
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* @return int
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*/
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public function getSpinCount()
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public function getSpinCount(): int
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{
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return $this->spinCount;
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}
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/**
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* Set SpinCount.
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*
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* @param int $pValue
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*
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* @return $this
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* Set spin count.
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*/
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public function setSpinCount($pValue)
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public function setSpinCount(int $spinCount): void
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{
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$this->spinCount = $pValue;
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$this->spinCount = $spinCount;
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}
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|
||||
return $this;
|
||||
/**
|
||||
* Verify that the given non-hashed password can "unlock" the protection.
|
||||
*/
|
||||
public function verify(string $password): bool
|
||||
{
|
||||
if (!$this->isProtectionEnabled()) {
|
||||
return true;
|
||||
}
|
||||
|
||||
$hash = PasswordHasher::hashPassword($password, $this->getAlgorithm(), $this->getSalt(), $this->getSpinCount());
|
||||
|
||||
return $this->getPassword() === $hash;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
|
|||
|
|
@ -420,42 +420,33 @@ class Worksheet extends WriterPart
|
|||
// sheetProtection
|
||||
$objWriter->startElement('sheetProtection');
|
||||
|
||||
if ($pSheet->getProtection()->getPassword() !== '') {
|
||||
$objWriter->writeAttribute('password', $pSheet->getProtection()->getPassword());
|
||||
$protection = $pSheet->getProtection();
|
||||
|
||||
if ($protection->getAlgorithm()) {
|
||||
$objWriter->writeAttribute('algorithmName', $protection->getAlgorithm());
|
||||
$objWriter->writeAttribute('hashValue', $protection->getPassword());
|
||||
$objWriter->writeAttribute('saltValue', $protection->getSalt());
|
||||
$objWriter->writeAttribute('spinCount', $protection->getSpinCount());
|
||||
} elseif ($protection->getPassword() !== '') {
|
||||
$objWriter->writeAttribute('password', $protection->getPassword());
|
||||
}
|
||||
|
||||
if ($pSheet->getProtection()->getHashValue() !== '') {
|
||||
$objWriter->writeAttribute('hashValue', $pSheet->getProtection()->getHashValue());
|
||||
}
|
||||
|
||||
if ($pSheet->getProtection()->getAlgorithmName() !== '') {
|
||||
$objWriter->writeAttribute('algorithmName', $pSheet->getProtection()->getAlgorithmName());
|
||||
}
|
||||
|
||||
if ($pSheet->getProtection()->getSaltValue() !== '') {
|
||||
$objWriter->writeAttribute('saltValue', $pSheet->getProtection()->getSaltValue());
|
||||
}
|
||||
|
||||
if ($pSheet->getProtection()->getSpinCount() !== '') {
|
||||
$objWriter->writeAttribute('spinCount', $pSheet->getProtection()->getSpinCount());
|
||||
}
|
||||
|
||||
$objWriter->writeAttribute('sheet', ($pSheet->getProtection()->getSheet() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('objects', ($pSheet->getProtection()->getObjects() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('scenarios', ($pSheet->getProtection()->getScenarios() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('formatCells', ($pSheet->getProtection()->getFormatCells() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('formatColumns', ($pSheet->getProtection()->getFormatColumns() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('formatRows', ($pSheet->getProtection()->getFormatRows() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('insertColumns', ($pSheet->getProtection()->getInsertColumns() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('insertRows', ($pSheet->getProtection()->getInsertRows() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('insertHyperlinks', ($pSheet->getProtection()->getInsertHyperlinks() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('deleteColumns', ($pSheet->getProtection()->getDeleteColumns() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('deleteRows', ($pSheet->getProtection()->getDeleteRows() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('selectLockedCells', ($pSheet->getProtection()->getSelectLockedCells() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('sort', ($pSheet->getProtection()->getSort() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('autoFilter', ($pSheet->getProtection()->getAutoFilter() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('pivotTables', ($pSheet->getProtection()->getPivotTables() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('selectUnlockedCells', ($pSheet->getProtection()->getSelectUnlockedCells() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('sheet', ($protection->getSheet() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('objects', ($protection->getObjects() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('scenarios', ($protection->getScenarios() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('formatCells', ($protection->getFormatCells() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('formatColumns', ($protection->getFormatColumns() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('formatRows', ($protection->getFormatRows() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('insertColumns', ($protection->getInsertColumns() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('insertRows', ($protection->getInsertRows() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('insertHyperlinks', ($protection->getInsertHyperlinks() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('deleteColumns', ($protection->getDeleteColumns() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('deleteRows', ($protection->getDeleteRows() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('selectLockedCells', ($protection->getSelectLockedCells() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('sort', ($protection->getSort() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('autoFilter', ($protection->getAutoFilter() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('pivotTables', ($protection->getPivotTables() ? 'true' : 'false'));
|
||||
$objWriter->writeAttribute('selectUnlockedCells', ($protection->getSelectUnlockedCells() ? 'true' : 'false'));
|
||||
$objWriter->endElement();
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,39 @@
|
|||
<?php
|
||||
|
||||
namespace PhpOffice\PhpSpreadsheetTests\Worksheet;
|
||||
|
||||
use PhpOffice\PhpSpreadsheet\Worksheet\Protection;
|
||||
use PHPUnit\Framework\TestCase;
|
||||
|
||||
class ProtectionTest extends TestCase
|
||||
{
|
||||
public function testVerifyPassword(): void
|
||||
{
|
||||
$protection = new Protection();
|
||||
self::assertTrue($protection->verify('foo'), 'non-protected always pass');
|
||||
|
||||
$protection->setSheet(true);
|
||||
self::assertFalse($protection->verify('foo'), 'protected will fail');
|
||||
|
||||
$protection->setPassword('foo', true);
|
||||
self::assertSame('foo', $protection->getPassword(), 'was not stored as-is, without hashing');
|
||||
self::assertFalse($protection->verify('foo'), 'setting already hashed password will not match');
|
||||
|
||||
$protection->setPassword('foo');
|
||||
self::assertSame('CC40', $protection->getPassword(), 'was hashed');
|
||||
self::assertTrue($protection->verify('foo'), 'setting non-hashed password will hash it and not match');
|
||||
|
||||
$protection->setAlgorithm(Protection::ALGORITHM_MD5);
|
||||
self::assertFalse($protection->verify('foo'), 'changing algorithm will not match anymore');
|
||||
|
||||
$protection->setPassword('foo');
|
||||
$hash1 = $protection->getPassword();
|
||||
$protection->setPassword('foo');
|
||||
$hash2 = $protection->getPassword();
|
||||
|
||||
self::assertSame(24, mb_strlen($hash1));
|
||||
self::assertSame(24, mb_strlen($hash2));
|
||||
self::assertNotSame($hash1, $hash2, 'was hashed with automatic salt');
|
||||
self::assertTrue($protection->verify('foo'), 'setting password again, will hash with proper algorithm and will match');
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue