In cakephp 3 I tried to set cookie in my controller using write cookie method. Error got invalid key for decrypt(), key must be at least 256 bits (32 bytes) long – used following line of code.
$this->Cookie->write(‘username’, ‘test’, true, ‘1 year’);
I got following error after execting page.
Invalid key for decrypt(), key must be at least 256 bits (32 bytes) long
Before using cookie write method, I loaded cookie component in appcontroller using following line.
I loaded conponnet in initialize method (appcontroller.php)
After searching I found following solution. I changed app.php file and added following line of code
'Security' => [
'salt' => '123456789purab@eparinay!@#*$($(',
Above solution worked for me and it solved issue.
If you are getting this error means your Security.salt in app.php does not have the correct length.