first commit

2023-10-10 17:07:22 +02:00
commit f7e668c8fb
10 changed files with 988 additions and 0 deletions
@@ -0,0 +1 @@
+/node_modules
@@ -0,0 +1,13 @@
+const PassCheck = require('./passwordcheck');
+const JWTManager = require('./jwt');
+const RateLimiter = require('./ratelimit');
+const PassPolicy = require('./passpolicy');
+const PasswordGenerator = require('./passgen');
+
+module.exports = {
+    PassCheck,
+    JWTManager,
+    RateLimiter,
+    PassPolicy,
+    PasswordGenerator
+};
@@ -0,0 +1,53 @@
+const jwt = require('jsonwebtoken');
+
+class JwtAuth{
+    constructor(JWTSecretKey){
+        this.JWTSecretKey = JWTSecretKey;
+        this.blacklist = [];
+    }
+
+    async generateJWT(payload, settings, secretKey = this.JWTSecretKey) {
+        return jwt.sign(payload, secretKey, settings);
+    }
+
+    async verifyJWT(token, secretKey = this.JWTSecretKey) {
+        if(this.blacklist.includes(token)) return { valid: false, message: "Token is blacklisted." };
+        return jwt.verify(token, secretKey);
+    }
+
+    async decodeJWT(token) {
+        if(this.blacklist.includes(token)) return { valid: false, message: "Token is blacklisted." };
+        return jwt.decode(token);
+    }
+
+    async getJWTExpirationDate(token) {
+        if(this.blacklist.includes(token)) return { valid: false, message: "Token is blacklisted." };
+        const decoded = await this.decodeJWT(token);
+        return decoded.exp;
+    }
+
+    async isJWTExpired(token) {
+        if(this.blacklist.includes(token)) return { valid: false, message: "Token is blacklisted." };
+        const expirationDate = await this.getJWTExpirationDate(token);
+        return expirationDate < Date.now();
+    }
+
+    async refreshJWT(token, settings, secretKey = this.JWTSecretKey) {
+        if(this.blacklist.includes(token)) return { valid: false, message: "Token is blacklisted." };
+        const decoded = await this.verifyJWT(token, secretKey);
+        const newToken = await this.generateJWT(decoded, settings, secretKey);
+        return newToken;
+    }
+
+    async BlackListJWT(token) {
+        //check if token is already blacklisted
+        if (this.blacklist.includes(token)) {
+            return { valid: false, message: "Token is already blacklisted." };
+        }
+        //add token to blacklist
+        this.blacklist.push(token);
+        return { valid: true, message: "Token successfully blacklisted."};
+    }
+}
+
+module.exports = JwtAuth;
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+    }
+  }
+}
@@ -0,0 +1,15 @@
+{
+  "name": "guardian",
+  "version": "0.0.1",
+  "description": "authentication tool",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "kaj van schalkwijk",
+  "license": "MIT",
+  "dependencies": {
+    "bcrypt": "^5.1.1",
+    "jsonwebtoken": "^9.0.2"
+  }
+}
@@ -0,0 +1,56 @@
+class PasswordGenerator{
+    constructor(options){
+        const defaultOptions = {
+            minLength: 6,
+            maxLength: 32,
+            minLower: 2,
+            minUpper: 2,
+            minNum: 2,
+            minSpecial: 3,
+            specialChars: "!@#$%^&*()_+~`|}{[]:;?><,./-=",
+        };
+        this.options = { ...defaultOptions, ...options };
+    }
+
+    async Generate(){
+        // Generate random password that complies with the options
+        const { minLength, maxLength, minLower, minUpper, minNum, minSpecial, specialChars } = this.options;
+
+        let pass = "";
+
+        let lowerRegex = /[a-z]/g;
+        let upperRegex = /[A-Z]/g;
+        let numRegex = /[0-9]/g;
+
+        // Generate password
+        //generate random length
+        let length = Math.floor(Math.random() * (maxLength - minLength + 1) + minLength);
+        //generate random length for each character type
+        let lowerLength = Math.floor(Math.random() * (length - minLower - minUpper - minNum - minSpecial + 1) + minLower);
+        let upperLength = Math.floor(Math.random() * (length - lowerLength - minUpper - minNum - minSpecial + 1) + minUpper);
+        let numLength = Math.floor(Math.random() * (length - lowerLength - upperLength - minNum - minSpecial + 1) + minNum);
+        let specialLength = Math.floor(Math.random() * (length - lowerLength - upperLength - numLength - minSpecial + 1) + minSpecial);
+
+        //generate random characters
+        for(let i = 0; i < lowerLength; i++){
+            pass += lowerRegex[Math.floor(Math.random() * lowerRegex.length)];
+        }
+
+        for(let i = 0; i < upperLength; i++){
+            pass += upperRegex[Math.floor(Math.random() * upperRegex.length)];
+        }
+
+        for(let i = 0; i < numLength; i++){
+            pass += numRegex[Math.floor(Math.random() * numRegex.length)];
+        }
+
+        for(let i = 0; i < specialLength; i++){
+            pass += specialChars[Math.floor(Math.random() * specialChars.length)];
+        }
+
+        //shuffle password
+        pass = pass.split('').sort(function(){return 0.5-Math.random()}).join('');
+    }
+}
+
+module.exports = PasswordGenerator;
@@ -0,0 +1,72 @@
+class PassPolicy {
+    constructor(options) {
+        // Define default options and merge with provided options
+        const defaultOptions = {
+            minLength: 6,
+            maxLength: 256,
+            minLower: 1,
+            minUpper: 1,
+            minNum: 1,
+            minSpecial: 0,
+            specialChars: "!@#$%^&*()_+~`|}{[]:;?><,./-=",
+        };
+        this.options = { ...defaultOptions, ...options };
+    }
+
+    validate(password) {
+        const { minLength, maxLength, minLower, minUpper, minNum, minSpecial, specialChars } = this.options;
+
+        if (password.length < minLength || password.length > maxLength) {
+            return { valid: false, message: "Password length does not meet requirements." };
+        }
+
+        const lowerRegex = /[a-z]/g;
+        const upperRegex = /[A-Z]/g;
+        const numRegex = /[0-9]/g;
+        const specialRegex = new RegExp(`[${specialChars.replace(/[-/\\^$*+?.()|[\]{}]/g, "\\$&")}]`, "g");
+
+        const lowerCount = (password.match(lowerRegex) || []).length;
+        const upperCount = (password.match(upperRegex) || []).length;
+        const numCount = (password.match(numRegex) || []).length;
+        const specialCount = (password.match(specialRegex) || []).length;
+
+        if (lowerCount < minLower) {
+            return { valid: false, message: "Password must contain at least " + minLower + " lowercase letter(s)." };
+        }
+        if (upperCount < minUpper) {
+            return { valid: false, message: "Password must contain at least " + minUpper + " uppercase letter(s)." };
+        }
+        if (numCount < minNum) {
+            return { valid: false, message: "Password must contain at least " + minNum + " digit(s)." };
+        }
+        if (specialCount < minSpecial) {
+            return { valid: false, message: "Password must contain at least " + minSpecial + " special character(s)." };
+        }
+
+        return { valid: true };
+    }
+
+    async CheckDifference(newPassword, oldPassword, neededDifference) {
+        //check if new password is different from old password
+        if (newPassword === oldPassword) {
+            return { valid: false, message: "New password must be different from old password." };
+        }
+
+        //check how many characters are different
+        let diffCount = 0;
+        for (let i = 0; i < newPassword.length; i++) {
+            if (newPassword[i] !== oldPassword[i]) {
+                diffCount++;
+            }
+        }
+
+        //check if difference is enough
+        if (diffCount < neededDifference) {
+            return { valid: false, message: "New password must be different from old password by at least " + neededDifference + " characters." };
+        }
+        
+        return { valid: true };
+    }
+}
+
+module.exports = PassPolicy;
@@ -0,0 +1,20 @@
+const bcrypt = require('bcrypt');
+
+class PassCheck{
+    constructor(BcryptSaltRounds, PassPolicyOptions) {
+        this.BcryptSaltRounds = BcryptSaltRounds;
+        this.PassPolicy = new PassPolicy(PassPolicyOptions);
+    }
+
+    async verifyPassword(password, hash) {
+        return await bcrypt.compare(password, hash);
+    }
+
+    async hashPassword(password) {
+        const salt = await bcrypt.genSalt(this.BcryptSaltRounds);
+        const hash = await bcrypt.hash(password, salt);
+        return hash;
+    }
+}
+
+module.exports = PassCheck;
@@ -0,0 +1,73 @@
+class RateLimit{
+    constructor(maxRequests, timeFrame){
+        this.maxRequests = maxRequests;
+        this.timeFrame = timeFrame;
+        this.users = {};
+    }
+
+    async addUser(user){
+        this.users[user] = {
+            requests: this.maxRequests,
+            lastRequest: Date.now()
+        };
+    }
+
+    async removeUser(user){
+        delete this.users[user];
+    }
+
+    async checkUser(user){
+        if(!this.users[user]) await this.addUser(user);
+        return this.users[user];
+    }
+
+    async checkRateLimit(user){
+        const { requests, lastRequest } = await this.checkUser(user);
+        const now = Date.now();
+        if(now - lastRequest > this.timeFrame) {
+            this.users[user].requests = this.maxRequests;
+            this.users[user].lastRequest = now;
+            return true;
+        }
+        if(requests > 0) {
+            this.users[user].requests--;
+            return true;
+        }
+        return false;
+    }
+
+    async getRateLimit(user){
+        const { requests, lastRequest } = await this.checkUser(user);
+        const now = Date.now();
+        if(now - lastRequest > this.timeFrame) {
+            this.users[user].requests = this.maxRequests;
+            this.users[user].lastRequest = now;
+            return this.maxRequests;
+        }
+        return requests;
+    }
+
+    async getRateLimitReset(user){
+        const { requests, lastRequest } = await this.checkUser(user);
+        const now = Date.now();
+        if(now - lastRequest > this.timeFrame) {
+            this.users[user].requests = this.maxRequests;
+            this.users[user].lastRequest = now;
+            return this.timeFrame;
+        }
+        return this.timeFrame - (now - lastRequest);
+    }
+
+    async getRateLimitRemaining(user){
+        const { requests, lastRequest } = await this.checkUser(user);
+        const now = Date.now();
+        if(now - lastRequest > this.timeFrame) {
+            this.users[user].requests = this.maxRequests;
+            this.users[user].lastRequest = now;
+            return this.maxRequests;
+        }
+        return requests;
+    }
+}
+
+module.exports = RateLimit;