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<?php declare(strict_types=1); |
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namespace Files\Backend\Seafile\Model; |
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/** |
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* Encoder for Account Store V1 encoding |
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*/ |
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class AccountStoreV1Encoder |
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{ |
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/** |
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* Encode an account setting value |
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* |
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* {@see AccountStore::encryptBackendConfigProperty()} |
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* |
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* @param string $value |
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* @return string encoded |
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*/ |
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public static function encode(string $value): string |
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{ |
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$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES); |
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$encrypted = sodium_crypto_secretbox($value, $nonce, hex2bin(FILES_ACCOUNTSTORE_V1_SECRET_KEY)); |
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return bin2hex($nonce) . bin2hex($encrypted); |
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} |
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/** |
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* Decode an encoded account setting value |
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* |
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* {@see AccountStore::decryptBackendConfigProperty()} |
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* |
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* @param string $valueInHex |
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* @return string decoded |
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*/ |
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public static function decode(string $valueInHex): string |
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{ |
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$value = hex2bin($valueInHex); |
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if (!is_string($value)) { |
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throw new \UnexpectedValueException(sprintf('Not an envelope of an encrypted value. Raw binary length of envelope is %d.', strlen($valueInHex))); |
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} |
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$nonce = substr($value, 0, SODIUM_CRYPTO_SECRETBOX_NONCEBYTES); |
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if (!is_string($nonce) || strlen($nonce) !== SODIUM_CRYPTO_SECRETBOX_NONCEBYTES) { |
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throw new \UnexpectedValueException(sprintf('Not an encrypted value. Raw binary length is %d which is below %d.', strlen($value), SODIUM_CRYPTO_SECRETBOX_NONCEBYTES)); |
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} |
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$encrypted = substr($value, SODIUM_CRYPTO_SECRETBOX_NONCEBYTES, strlen($value)); |
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if (!is_string($encrypted)) { |
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throw new \UnexpectedValueException(sprintf('Not an encrypted value. Raw binary length is %d.', strlen($value))); |
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} |
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$result = sodium_crypto_secretbox_open($encrypted, $nonce, hex2bin(FILES_ACCOUNTSTORE_V1_SECRET_KEY)); |
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// Decryption failed, password might have changed |
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if (false === $result) { |
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throw new \UnexpectedValueException("invalid password"); |
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} |
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return $result; |
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} |
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} |
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grommunio /
grommunio-web
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