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Bug #68490 Blenc compile warning when running encrypted script with multiple redist keys
Submitted: 2014-11-24 11:05 UTC Modified: 2017-01-10 08:32 UTC
Votes:8
Avg. Score:4.9 ± 0.3
Reproduced:5 of 6 (83.3%)
Same Version:2 (40.0%)
Same OS:1 (20.0%)
From: czarek dot tomczak at gmail dot com Assigned:
Status: Suspended Package: BLENC (PECL)
PHP Version: 5.4.35 OS: Windows 7 64bit
Private report: No CVE-ID: None
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 [2014-11-24 11:05 UTC] czarek dot tomczak at gmail dot com 
Description:
------------
I am encrypting two php scripts and saving redistributable keys to ".blenc_keys" file. When running the first script (blenc_myscript_encoded.php) everything works fine, but when running the second script (blenc_myscript2_encoded.php) I get warning:

    Warning: blenc_compile: Validation of script 'C:\phpdesktop\phpdesktop-chrome\www\blenc_myscript2_encoded.php' failed. 
    MD5_FILE: c269d23aa66d05474d7b408484c74c1d MD5_CALC: bbf95ab01978895e216cc1d6ed4ccaea in Unknown on line 0

The second script executes fine after that warning is shown.

The blenc_encode.php example encrypts php script and saves redistributable key. There is also blenc_encode2.php that does the same but for blenc_myscript2.php / blenc_myscript2_encoded.php.

--------------------------------------------------------------------------------
blenc_encode.php
--------------------------------------------------------------------------------
<?php
error_reporting(-1);
$source_code = file_get_contents("blenc_myscript.php");
$source_code = preg_replace('#^<'.'\?php\s+#', '', $source_code);
$source_code = preg_replace('#\s+\?>\s*$#', '', $source_code);
$redist_key = blenc_encrypt($source_code, "blenc_myscript_encoded.php");
$key_file = ini_get('blenc.key_file');
file_put_contents($key_file, $redist_key."\n", FILE_APPEND);
?>

--------------------------------------------------------------------------------
blenc_myscript.php
--------------------------------------------------------------------------------
<?php
print("Printing a secret string: XuXuXaaa");
?>

--------------------------------------------------------------------------------
blenc_myscript2.php
--------------------------------------------------------------------------------
<?php
print("Printing a secret string: XuXuXaaa");
?>

--------------------------------------------------------------------------------
.blenc_keys
--------------------------------------------------------------------------------
s6VQnAHX/VXaOLjkks6eHrecTLFDmJn1FHXWo/5BuW4=
QOAqS7SNr2+yDES7EOY0hMPOd1TxCPB/kNTpUfcNzzE=

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 [2014-11-24 11:24 UTC] czarek dot tomczak at gmail dot com 
On blenc_encrypt() manual page (http://php.net/manual/en/function.blenc-encrypt.php) there is an error in Example #1. Redistributable keys are saved on the same line, but they should be seperated by new line character. This line:

    file_put_contents($key_file, $redistributable_key, FILE_APPEND);

Should be changed to:

    file_put_contents($key_file, $redistributable_key."\n", FILE_APPEND);

People are getting into troubles because of that when script is run multiple times. Blenc key file is getting corrupted and results in a fatal error:

    Fatal error: blenc_compile: Validation of script 'encrypt.php' failed,
    cannot execute. in C:\xampp\htdocs\PHPEncode\encode.php on line 14
 [2015-03-18 06:52 UTC] ameerhamza dot tariqjaveed at gmail dot com 
I used your encoder file but i get this error
Fatal error: blenc_compile: Validation of script 'C:/xampp/htdocs/test/encrypt.php' failed, cannot execute. in Unknown on line 0

----------------------------------------------------------------------
encoder.php
----------------------------------------------------------------------

<?php
error_reporting(-1);
$source_code = file_get_contents("encrypt.php");
$source_code = preg_replace('#^<'.'\?php\s+#', '', $source_code);
$source_code = preg_replace('#\s+\?>\s*$#', '', $source_code);
$redist_key = blenc_encrypt($source_code, "blenc_myscript_encoded.php");
$key_file = ini_get('blenc.key_file');
file_put_contents($key_file, $redist_key."\n", FILE_APPEND);
?>
 [2017-01-10 08:32 UTC] kalle@php.net
-Status: Open +Status: Suspended
 [2017-01-10 08:32 UTC] kalle@php.net 
I'm suspending the reports for BLENC as it doesn't seem to have stalled (looking at both repositories I could find on git.php.net and github) and it does not seem compatible with any currently supported version of PHP either. Please unsuspend in case someone takes over this extension
 [2017-01-10 08:32 UTC] kalle@php.net 
I'm suspending the reports for BLENC as it doesn't seem to have stalled (looking at both repositories I could find on git.php.net and github) and it does not seem compatible with any currently supported version of PHP either. Please unsuspend in case someone takes over this extension
 
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