php - How to decrypt SSN field from DB that is encrypted using Crypt::encrypt in Laravel? -

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i trying create web service passing id, username, ssn input parameters , retrieve required information of particular user in json response.

i can create db query gather user data , filter query result based on id, username. but, ssn encrypted using crypt::encrypt() , stored in database. have decrypt value , match user entered ssn in input parameter.

i tried using crypt::decrypt() in clause of db query didn't work out. how decrypt ssn in such situation?

my original query is: 

$ssn = 123456789;  $res = db::table('users')             ->where('users.ssn', '=', $ssn)             ->select('users.ssn ssn')             ->get();

i tried decrypt ssn db:

$res = db::table('users')         ->where('crypt::decrypt(users.ssn)', '=', $ssn)         ->select('users.ssn ssn')         ->get();





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