Trying to add data in unsupported state [duplicate] - node.js

Question

This question already has answers here:
Trying to add data in unsupported state at Cipher.update
(3 answers)
Closed 2 years ago.
This is the code of my site. First time I run, it worked and showed data but the other times it shows the error "Trying to add data in unsupported state" Please help me.
var connection = require("./dbconnection");
var keys = require('./keys');
var mysql = require('mysql');
var crypto = require('crypto');
var algoritm = "aes-256-ctr";
var nameCipher = crypto.createCipher(algoritm, keys.name);
var passwordCipher = crypto.createCipher(algoritm, keys.password);
var nameDecipher = crypto.createDecipher(algoritm, keys.name);
var passwordDecipher = crypto.createCipher(algoritm, keys.password);
function encrypt(text, type) {
if (type === 1) {
var nameC = nameCipher.update(text, "utf8", "hex");
nameC += nameCipher.final("hex");
return nameC;
} else if (type === 2) {
var passwordC = passwordCipher.update(text, "utf8", "hex");
passwordC += passwordCipher.final("hex");
return passwordC;
}
}
function decrypt(text, type) {
if (type === 1) {
var nameDec = nameDecipher.update(text, "hex", "utf8");
nameDec += nameDecipher.final("utf8");
return nameDec;
} else if (type === 2) {
var passwordDec = passwordDecipher.update(text, "hex", "utf8");
passwordDec += passwordDecipher.final("utf8");
return passwordDec;
}
}
function logIn(name, password) {
var eName = encrypt(name, 1);
var ePassword = encrypt(password, 2);
var dData;
console.dir(eName);
console.dir(ePassword);
connection.getConnection(function (err, connection) {
connection.query("SELECT * FROM students WHERE name=\"" + eName + "\" AND password=\"" + ePassword + "\"",
function (err, data) {
if (err) throw err;
console.dir(data);
dData = data;
})
})
}
exports.logIn = logIn;

Answer 1

Always create a new cipher before updating. You should create them inside the encrypt and decrypt functions.
function encrypt(text, type) {
var nameCipher = crypto.createCipher(algoritm, keys.name); //<---- here
var passwordCipher = crypto.createCipher(algoritm, keys.password); //<---- here
if (type === 1) {
var nameC = nameCipher.update(text, "utf8", "hex");
nameC += nameCipher.final("hex");
return nameC;
} else if (type === 2) {
var passwordC = passwordCipher.update(text, "utf8", "hex");
passwordC += passwordCipher.final("hex");
return passwordC;
}
}