From df8fe3300768ce713f00f0ca0bbfa94a8199205a Mon Sep 17 00:00:00 2001
From: Adil El Farissi <144741970+AdilElFarissi@users.noreply.github.com>
Date: Thu, 29 Feb 2024 01:09:20 +0000
Subject: [PATCH] Last cosmetics and PHP/LSL test scripts
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

All is working fine :)

The following script send a request to the PHP file where the encrypted  string using osAESEncrypt() is decrypted and re-encrypted using the PHP openssl_XXXX. the return is the original string and the re-encrypted separated by "|"... the script decrypt the returned re-encrypted using osAESDecrypt() and log it in the chat.

LSL script:
<pre><code>
// Change the url to point to your PHP file.
string url =  "http://127.0.0.1/aesTest.php";
string plainText = "Hello World :)";
string secret = "#!qUeRtY$@123^456€!#";
key r_id;

default
{
    touch_start(integer i)
    {
        string encryptedText = osAESEncrypt(secret, plainText);
        llOwnerSay("\nEncrypted with osAESEncrypt:\n"+ encryptedText);

        r_id = llHTTPRequest(url, [HTTP_METHOD,"POST",HTTP_MIMETYPE,"application/x-www-form-urlencoded",HTTP_BODY_MAXLENGTH,"16384"], "data="+ encryptedText);
    }

    http_response(key id, integer status, list metaData, string Response){
        if(status = 200 ){
            if(id == r_id){
                if(Response != ""){
                    list temp = llParseString2List(Response,"|",[]);
                    llOwnerSay("\nDecrypted using PHP openssl_decrypt:\n"+ llList2String(temp,0));
                    llOwnerSay("\nEncrypted using PHP openssl_encrypt:\n"+ llList2String(temp,1));
                    string decryptedText = osAESDecrypt(secret, llList2String(temp,1));
                    llOwnerSay("\nDecrypted with osAESDecrypt from PHP:\n"+ decryptedText);
                }
                else{
                    llOwnerSay("Enc/Dec Failed! Response:\n"+ Response);
                }
            }
        }
        else{
             llOwnerSay("Destination not available.\nstatus: "+ status);
        }
    }
}
</code></pre>

The PHP file:
<pre><code>
<?php
    if(getenv('REQUEST_METHOD') == 'POST') {
	    $script_data = file_get_contents("php://input");
        if($script_data){
            $data = $_POST['data'];
            $secret = "#!qUeRtY$@123^456€!#";
            $key = hex2bin(strtoupper(hash('sha256', $secret)));
            $iv = hex2bin(strtoupper(explode(":", $data)[0]));
            $encryptedText = hex2bin(strtoupper(explode(":", $data)[1]));
            $plainText = openssl_decrypt($encryptedText, "AES-256-CBC", $key, $options=OPENSSL_RAW_DATA, $iv);
            $retIv = openssl_random_pseudo_bytes(16);
            $reEncrypted = openssl_encrypt($plainText, "AES-256-CBC", $key, $options=OPENSSL_RAW_DATA, $retIv);

            echo $plainText && $reEncrypted ? $plainText."|".bin2hex($retIv).":".bin2hex($reEncrypted) : "";

        }
    };
?>
</code></pre>

Co-Authored-By: Ubit Umarov <469643+UbitUmarov@users.noreply.github.com>
---
 OpenSim/Framework/Util.cs                                     | 2 +-
 .../Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/OpenSim/Framework/Util.cs b/OpenSim/Framework/Util.cs
index 62fd51a994..2cd3306733 100644
--- a/OpenSim/Framework/Util.cs
+++ b/OpenSim/Framework/Util.cs
@@ -1416,7 +1416,7 @@ namespace OpenSim.Framework
                 }
             }
 
-            return $"{Convert.ToHexString(iv)}:{Convert.ToHexString(encryptedText).ToLower()}";
+            return $"{Convert.ToHexString(iv)}:{Convert.ToHexString(encryptedText)}";
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index 76a859875c..af0a227756 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -6497,7 +6497,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 OSSLShoutError("osAESEncrypt: Failed to encrypt!");
                 return LSL_String.Empty;
             }
-            return ret.ToString();
+            return ret.ToString().ToLower();
         }
 
         public LSL_String osAESDecrypt(string secret, string encryptedText)
@@ -6525,7 +6525,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 OSSLShoutError("osAESEncryptTo: Failed to encrypt!");
                 return LSL_String.Empty;
             }
-            return ret.ToString();
+            return ret.ToString().ToLower();
         }
 
         public LSL_String osAESDecryptFrom(string secret, string encryptedText, string ivString)