1 files changed, 33 insertions, 0 deletions
diff --git a/vendor/nelexa/zip/src/PhpZip/Util/CryptoUtil.php b/vendor/nelexa/zip/src/PhpZip/Util/CryptoUtil.php
new file mode 100644
index 0000000..7403c93
--- /dev/null
+++ b/vendor/nelexa/zip/src/PhpZip/Util/CryptoUtil.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace PhpZip\Util;
+
+use PhpZip\Exception\RuntimeException;
+
+/**
+ * Crypto Utils
+ */
+class CryptoUtil
+{
+
+    /**
+     * Returns random bytes.
+     *
+     * @param int $length
+     * @return string
+     * @throws RuntimeException
+     */
+    final public static function randomBytes($length)
+    {
+        $length = (int)$length;
+        if (function_exists('random_bytes')) {
+            return random_bytes($length);
+        } elseif (function_exists('openssl_random_pseudo_bytes')) {
+            return openssl_random_pseudo_bytes($length);
+        } elseif (function_exists('mcrypt_create_iv')) {
+            return mcrypt_create_iv($length);
+        } else {
+            throw new RuntimeException('Extension openssl or mcrypt not loaded');
+        }
+    }
+}