Laravel 5: Decryption error The Mac is invalid

Question

When i try to login the following error produced:

DecryptException in BaseEncrypter.php line 49: The MAC is invalid.

I am using xampp with php 7.

The laravel version that i use is 5.2.

*I have change the api key running php artisan key:generate. **I have trying the following commands: php artisan cache:clear composer dump-autoload composer update with no lucky. I have clear the history of the browser.

** Here are the values of some variables:

iv=a69g/gRfyCNWTaKeuZ2Kkw== value=C7DfTHbFWfZq0km633uXMX0ZRd1fuzcFFBgP0vtZj/d4C4Z3btgeFlmU2a1C9TdUlUDof4mnoGhdvEeB/gL1TQ== mac=c0460e4ea3d724631cf4a12b7b19a5e512ecec8f492b4754e183714cc9d0a05c

Any help would be usefull. Thanks in advance.

solved in https://stackoverflow.com/questions/46070732/laravel-decryptexception-the-mac-is-invalid/47926508#47926508 — 4givN
– 4givN, Commented Dec 21, 2017 at 13:58

Oliver Bayes-Shelton · Accepted Answer · 2017-07-20 17:39:26Z

2

I know this is a little late but it might be useful for future me or someone else.

I had an issue where I had to encrypt something in the database, changed the APP_KEY and then tried to decrypt it and this error happened.

answered Jul 20, 2017 at 17:39

Oliver Bayes-Shelton

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1 Comment

markdwhite Over a year ago

It can also apply when a CSRF token is provided as POST data that does not decrypt correctly based on the current APP_KEY, ie: it's forged

Chris P · Accepted Answer · 2016-07-12 12:47:46Z

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It was an error on redis server. Hope that someone will help.

answered Jul 12, 2016 at 12:47

Chris P

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Ahmed Ashour · Accepted Answer · 2017-02-21 10:12:10Z

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There might be some issue with the .env file as I am having the same problem.

There should be space between APP_KEY and APP_DEBUG

edited Feb 21, 2017 at 10:12

Ahmed Ashour

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answered Feb 21, 2017 at 9:41

gaurav

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Lameck Meshack · Accepted Answer · 2023-02-21 17:20:29Z

I could find a solution I tried everything including regenerating. However, this worked for me... If you have an existing app_key (in another folder/locally) you may want to restore, you can update it in the .env file manually. Locate the APP_KEY entry in the file and replace the value with the key in your initial .env in your previous project

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