Bug #73978 [Opn->Fbk]: openssl_decrypt triggers bug in PDO
Edit report at https://bugs.php.net/bug.php?id=73978&edit=1
ID: 73978
Updated by: requinix@php.net
Reported by: schmittjoh at gmail dot com
Summary: openssl_decrypt triggers bug in PDO
-Status: Open
+Status: Feedback
Type: Bug
Package: PDO MySQL
Operating System: Ubuntu 16.04
PHP Version: 7.1.1
Block user comment: N
Private report: N
New Comment:
What happens if you do the problematic openssl_decrypt() *before* the connection?
Previous Comments:
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[2017-01-23 11:43:54] schmittjoh at gmail dot com
Description:
------------
We get an SSL error when connecting to a secure MySQL server for some queries:
Warning: PDOStatement::execute(): SSL operation failed with code 1. OpenSSL Error messages:
error:0607A082:digital envelope routines:EVP_CIPHER_CTX_set_key_length:invalid key length
error:0607A082:digital envelope routines:EVP_CIPHER_CTX_set_key_length:invalid key length
The error happens for the next query after we used the openssl_decrypt function in our code. It
seems like this function is not properly encapsulated or leaves some state behind which then
triggers the error in PDO.
I was not able to reproduce a test-case with values that would not expose our secret, but making a
second call to openssl_decrypt with no meaningful values fixes it.
Test script:
---------------
// This query runs fine.
$con->prepare("SELECT 1")->execute()->fetchColumn();
// This call leaves some state behind that causes error on second query.
openssl_decrypt(/* real arguments here */);
// Adding a call like this works around the bug.
// openssl_decrypt('', 'AES-256-CBC', '', 0, '');
// Error on this query.
$con->prepare("SELECT 1")->execute()->fetchColumn();
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Edit this bug report at https://bugs.php.net/bug.php?id=73978&edit=1
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