Astra Security

2021-08-30 15:06:36 +10:00
parent 9dc1cdddca
commit 9f437f9588
547 changed files with 65968 additions and 0 deletions
--- a/libraries/Crypto.php
+++ b/libraries/Crypto.php
@@ -0,0 +1,71 @@
+<?php
+
+class Astra_crypto
+{
+    function encrypt($plainText, $key)
+    {
+        $ivsize = openssl_cipher_iv_length('AES-128-CBC');
+        $plainPad = $this->pkcs5_pad($plainText, $ivsize);
+        $secretKey = $this->hextobin(md5($key));
+        $initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
+
+        $ciphertext = openssl_encrypt(
+            $plainPad,
+            'AES-128-CBC',
+            $secretKey,
+            OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING,
+            $initVector
+        );
+
+        return bin2hex($ciphertext);
+
+    }
+
+    function decrypt($encryptedText, $key)
+    {
+        $secretKey = $this->hextobin(md5($key));
+        $initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
+        $encryptedText = $this->hextobin($encryptedText);
+
+        $decryptedText = openssl_decrypt(
+            $encryptedText,
+            'AES-128-CBC',
+            $secretKey,
+            OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING,
+            $initVector
+        );
+
+
+        $decryptedText = rtrim($decryptedText, "\0");
+        return $decryptedText;
+    }
+
+    //*********** Padding Function *********************
+
+    protected function pkcs5_pad($plainText, $blockSize)
+    {
+        $pad = $blockSize - (strlen($plainText) % $blockSize);
+        return $plainText . str_repeat(chr($pad), $pad);
+    }
+
+//********** Hexadecimal to Binary function for php 4.0 version ********
+
+    protected function hextobin($hexString)
+    {
+        $length = strlen($hexString);
+        $binString = "";
+        $count = 0;
+        while ($count < $length) {
+            $subString = substr($hexString, $count, 2);
+            $packedString = pack("H*", $subString);
+            if ($count == 0) {
+                $binString = $packedString;
+            } else {
+                $binString .= $packedString;
+            }
+
+            $count += 2;
+        }
+        return $binString;
+    }
+}