How to compare bcrypted password

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I am new to node js, I am trying to validate a password that is encrypted, and I have given the below code which I have tried.

What I have tried:

async function passCheck(event){ // in event i am passing user enterd password and email
var EnteredPassword = bcrypt.hashSync(event.password,10); //10 saltrounds

var fromDB = await pool.query('SELECT password from User WHERE email =
?',event.emailID );
if(EnteredPassword == fromDB){ //Here i am comparing
console.log("valid");
}
else{
console.log("invalid")
}
}

Posted 27-Jan-21 3:07am

pavan97386

Updated 27-Jan-21 4:21am

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Richard Deeming · Accepted Answer · 2021-01-27T04:21:00

Hopefully the password hash you're storing has been salted with a random salt per record. That salt should either be stored in a separate column, or combined into the stored password hash somehow.

If you hash the same password again, but use a different salt, then you will get a different result.

The documentation suggests that you need to use the bcrypt.compare function to compare the plaintext password to the stored hash:

To check a password - bcrypt - npm[^]:

JavaScript

// Load hash from your password DB.
bcrypt.compare(myPlaintextPassword, hash, function(err, result) {
    // result === true
});

Also, why are you calling the Sync methods in an async function?

JavaScript

async function passCheck(event){
    var fromDB = await pool.query('SELECT password FROM user WHERE email = ?', event.emailID);
    var passwordMatch = await bcrypt.compare(event.password, fromDB);
    if (passwordMatch) {
        console.log("valid");
    }
    else {
        console.log("invalid");
    }
}