Merge branch 'imgcaptcha' of https://github.com/asiekierka/Tinyboard

1 files changed, 37 insertions, 0 deletions

diff --git a/inc/ic-encrypt.php b/inc/ic-encrypt.php
new file mode 100644
index 00000000..5d73126b
--- /dev/null
+++ b/inc/ic-encrypt.php
@@ -0,0 +1,37 @@
+<?php
+// Z internetow.
+class Encryption {
+    public  function safe_b64encode($string) {
+        $data = base64_encode($string);
+        $data = str_replace(array('+','/','='),array('-','_',''),$data);
+        return $data;
+    }
+
+    public function safe_b64decode($string) {
+        $data = str_replace(array('-','_'),array('+','/'),$string);
+        $mod4 = strlen($data) % 4;
+        if ($mod4) {
+            $data .= substr('====', $mod4);
+        }
+        return base64_decode($data);
+    }
+
+    public  function encode($key, $value){ 
+        if(!$value){return false;}
+        $text = $value;
+        $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
+        $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
+        $crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_ECB, $iv);
+        return trim($this->safe_b64encode($crypttext)); 
+    }
+
+    public function decode($key, $value){
+        if(!$value){return false;}
+        $crypttext = $this->safe_b64decode($value); 
+        $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
+        $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
+        $decrypttext = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $crypttext, MCRYPT_MODE_ECB, $iv);
+        return trim($decrypttext);
+    }
+}
+?>