Merge branch 'split-file_simplecrypt.class.inc.php_SimpleCryptOpenSSLMcryptCompatibilityEngine.php' into split-file_simplecrypt.class.inc.php

sources/Application/SimpleCrypt/SimpleCryptOpenSSLMcryptCompatibilityEngine.php

@@ -0,0 +1,52 @@
+<?php
+
+class SimpleCryptOpenSSLMcryptCompatibilityEngine implements CryptEngine
+{
+	public static function GetNewDefaultParams()
+	{
+		return array('lib' => 'OpenSSLMcryptCompatibility', 'key' => null);
+	}
+
+	//fix for php < 7.1.8 (keys are Zero padded instead of cycle padded)
+	static private function MakeOpenSSLBlowfishKey($key)
+	{
+		if ("$key" === '') {
+			return $key;
+		}
+		$len = (16 + 2) * 4;
+		while (strlen($key) < $len) {
+			$key .= $key;
+		}
+		$key = substr($key, 0, $len);
+
+		return $key;
+	}
+
+	public function Encrypt($key, $sString)
+	{
+		$key = SimpleCryptOpenSSLMcryptCompatibilityEngine::MakeOpenSSLBlowfishKey($key);
+		$blockSize = 8;
+		$len = strlen($sString);
+		$paddingLen = intval(($len + $blockSize - 1) / $blockSize) * $blockSize - $len;
+		$padding = str_repeat("\0", $paddingLen);
+		$sData = $sString.$padding;
+		$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length("BF-CBC"));
+		$encrypted_string = openssl_encrypt($sData, "BF-CBC", $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv);
+
+		return $iv.$encrypted_string;
+	}
+
+	public function Decrypt($key, $encrypted_data)
+	{
+		$key = SimpleCryptOpenSSLMcryptCompatibilityEngine::MakeOpenSSLBlowfishKey($key);
+		$iv = mb_substr($encrypted_data, 0, openssl_cipher_iv_length("BF-CBC"), '8bit');
+		$encrypted_data = mb_substr($encrypted_data, openssl_cipher_iv_length("BF-CBC"), null, '8bit');
+		$plaintext = openssl_decrypt($encrypted_data, "BF-CBC", $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING, $iv);
+		if ($plaintext === false) {
+			$plaintext = Dict::S("Core:AttributeEncryptFailedToDecrypt");
+		}
+
+		return trim($plaintext);
+	}
+
+}