J. Bohon J. Bohon

J. Bohon J. Bohon

1595575829

How to Create and Validate JSON Web Tokens in Deno

In this blog, we’ll see how to create and validate a JWT(JSON Web Token) in Deno. For this, we’ll be using djwt, the absolute minimum library to make JSON Web Tokens in deno and Oak framework

Before You Get Started

This tutorial assumes you have:

  • A basic understanding of JavaScript and Deno
  • Latest Deno version installed on your system

What is JWT?

JSON Web Token is an internet standard used to create tokens for an application. These tokens hold JSON data and are cryptographically signed.

Here is how a sample Json Web Token looks like

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6Im9sYXR1bmRlZ2FydWJhQGdtYWlsLmNvbSIsIm

JWT is a good way of securely sending information between parties. Because JWTs can be signed—for, you can be sure the senders are who they say they are. And, as the signature is generated using the header and the payload, you can also verify that the content hasn’t been tampered with.

JWT can contain user information in the payload and also can be used in the session to authenticate the user.

If you want to know more about JSON Web Token.

How to generate JWT token in Deno

First, let’s set up a Deno server to accept requests, for it, we are using Oak framework, it is quite simple and few lines of codes as you can see below.

// index.ts
import { Application, Router } from "https://deno.land/x/oak/mod.ts";

const router = new Router();
router
  .get("/", (context) => {
    context.response.body = "JWT Example!";
  })

const app = new Application();
app.use(router.routes());
app.use(router.allowedMethods());

await app.listen({ port: 8000 });

Once our program is ready for accepting request lets import djwt functions to generate JWT token, In below code we can use a secret key, expiry time for JWT token in 1 hour from the time program will run and we are using HS256 algorithm.

Add the below code in index.ts and update the router as shown below, you can now get a brand new token on http://localhost:8000/generate

#deno #nodejs #json web tokens #jwt

What is GEEK

Buddha Community

How to Create and Validate JSON Web Tokens in Deno
J. Bohon J. Bohon

J. Bohon J. Bohon

1595575829

How to Create and Validate JSON Web Tokens in Deno

In this blog, we’ll see how to create and validate a JWT(JSON Web Token) in Deno. For this, we’ll be using djwt, the absolute minimum library to make JSON Web Tokens in deno and Oak framework

Before You Get Started

This tutorial assumes you have:

  • A basic understanding of JavaScript and Deno
  • Latest Deno version installed on your system

What is JWT?

JSON Web Token is an internet standard used to create tokens for an application. These tokens hold JSON data and are cryptographically signed.

Here is how a sample Json Web Token looks like

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6Im9sYXR1bmRlZ2FydWJhQGdtYWlsLmNvbSIsIm

JWT is a good way of securely sending information between parties. Because JWTs can be signed—for, you can be sure the senders are who they say they are. And, as the signature is generated using the header and the payload, you can also verify that the content hasn’t been tampered with.

JWT can contain user information in the payload and also can be used in the session to authenticate the user.

If you want to know more about JSON Web Token.

How to generate JWT token in Deno

First, let’s set up a Deno server to accept requests, for it, we are using Oak framework, it is quite simple and few lines of codes as you can see below.

// index.ts
import { Application, Router } from "https://deno.land/x/oak/mod.ts";

const router = new Router();
router
  .get("/", (context) => {
    context.response.body = "JWT Example!";
  })

const app = new Application();
app.use(router.routes());
app.use(router.allowedMethods());

await app.listen({ port: 8000 });

Once our program is ready for accepting request lets import djwt functions to generate JWT token, In below code we can use a secret key, expiry time for JWT token in 1 hour from the time program will run and we are using HS256 algorithm.

Add the below code in index.ts and update the router as shown below, you can now get a brand new token on http://localhost:8000/generate

#deno #nodejs #json web tokens #jwt

Alex O'Sullivan

Alex O'Sullivan

1594435834

How to Create and Validate JSON Web Tokens in Deno

In this post, we’ll see how to create and validate a JWT(JSON Web Token) in Deno. For this, we’ll be using djwt, the absolute minimum library to make JSON Web Tokens in deno and Oak framework

Before You Get Started

This tutorial assumes you have:

  • A basic understanding of JavaScript and Deno
  • Latest Deno version installed on your system

What is JWT?

JSON Web Token is an internet standard used to create tokens for an application. These tokens hold JSON data and are cryptographically signed.

Here is how a sample Json Web Token looks like

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6Im9sYXR1bmRlZ2FydWJhQGdtYWlsLmNvbSIsIm

JWT is a good way of securely sending information between parties. Because JWTs can be signed—for, you can be sure the senders are who they say they are. And, as the signature is generated using the header and the payload, you can also verify that the content hasn’t been tampered with.

JWT can contain user information in the payload and also can be used in the session to authenticate the user.

If you want to know more about JSON Web Token, We have a very good article about it.

How to generate JWT token in Deno

First, let’s set up a Deno server to accept requests, for it, we are using Oak framework, it is quite simple and few lines of codes as you can see below.

// index.ts
import { Application, Router } from "https://deno.land/x/oak/mod.ts";

const router = new Router();
router
  .get("/", (context) => {
    context.response.body = "JWT Example!";
  })

const app = new Application();
app.use(router.routes());
app.use(router.allowedMethods());

await app.listen({ port: 8000 });

Once our program is ready for accepting request lets import djwt functions to generate JWT token, In below code we can use a secret key, expiry time for JWT token in 1 hour from the time program will run and we are using HS256 algorithm.

Add the below code in index.ts and update the router as shown below, you can now get a brand new token on http://localhost:8000/generate

// index.ts
...

import { makeJwt, setExpiration, Jose, Payload } from "https://deno.land/x/djwt/create.ts";

const key = "secret-key";
const payload: Payload = {
  iss: "Jon Doe",
  exp: setExpiration(new Date().getTime() + 60000),
};
const header: Jose = {
  alg: "HS256",
  typ: "JWT",
};

const router = new Router();
router
  .get("/", (context) => {
    context.response.body = "JWT Example!";
  })
  .get("/generate", (context) => {
    context.response.body = makeJwt({ header, payload, key }) + "\n";
  })

...

#deno #jwt #json #security #developer

Brandon Adams

Brandon Adams

1625637060

What is JSON? | JSON Objects and JSON Arrays | Working with JSONs Tutorial

In this video, we work with JSONs, which are a common data format for most web services (i.e. APIs). Thank you for watching and happy coding!

Need some new tech gadgets or a new charger? Buy from my Amazon Storefront https://www.amazon.com/shop/blondiebytes

What is an API?
https://youtu.be/T74OdSCBJfw

JSON Google Extension
https://chrome.google.com/webstore/detail/json-formatter/bcjindcccaagfpapjjmafapmmgkkhgoa?hl=en

Endpoint Example
http://maps.googleapis.com/maps/api/geocode/json?address=13+East+60th+Street+New+York,+NY

Check out my courses on LinkedIn Learning!
REFERRAL CODE: https://linkedin-learning.pxf.io/blondiebytes
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Support me on Patreon!
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Check out my Python Basics course on Highbrow!
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Want to BINGE?? Check out these playlists…

Quick Code Tutorials: https://www.youtube.com/watch?v=4K4QhIAfGKY&index=1&list=PLcLMSci1ZoPu9ryGJvDDuunVMjwKhDpkB

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#jsons #json arrays #json objects #what is json #jsons tutorial #blondiebytes

aaron silva

aaron silva

1622197808

SafeMoon Clone | Create A DeFi Token Like SafeMoon | DeFi token like SafeMoon

SafeMoon is a decentralized finance (DeFi) token. This token consists of RFI tokenomics and auto-liquidity generating protocol. A DeFi token like SafeMoon has reached the mainstream standards under the Binance Smart Chain. Its success and popularity have been immense, thus, making the majority of the business firms adopt this style of cryptocurrency as an alternative.

A DeFi token like SafeMoon is almost similar to the other crypto-token, but the only difference being that it charges a 10% transaction fee from the users who sell their tokens, in which 5% of the fee is distributed to the remaining SafeMoon owners. This feature rewards the owners for holding onto their tokens.

Read More @ https://bit.ly/3oFbJoJ

#create a defi token like safemoon #defi token like safemoon #safemoon token #safemoon token clone #defi token

Hollie Ratke

Hollie Ratke

1596830400

What is JSON Web Token

A JSON Web Token (JWT) is a JSON object that is defined in RFC 7519 as a safe way of transmitting information between two parties. Information in the JWT is digitally-signed, so that it can be verified and trusted.

JWT Properties

  • Less verbose - JWT is compact in size and can be passed in the URL, POST parameter, or HTTP header.
  • Self-contained - JWT carries all of information needed for exchanging information and authentication.
  • Versatile - JWT works in .NET, Python, Node.js, Java, PHP, Ruby, Go, JavaScript, and Haskell.

JWT Use Cases

  • Information Exchange - JWT can be used between two parties to exchange information. JWT is digitally-signed and can be used in a secure public/private key pair. Information is verified using the public key on the other end.
  • Authentication - JWT can contain user information in the payload and can be used in the session to authenticate the user. Once authenticated, users can access protected resources in an application using the JWT included in the request. So, every request will be authenticated by verifying the JWT.

JWT contains three parts: Header, Payload, and Signature which are separated by a dot.

Header.Payload.Signature

Header

The JWT Header consists of 2 parts:

  • The token type (typ): JWT
  • Algorithm used to sign the token (alg)
{  
 "typ" : "JWT",  
 "alg" : "HS256"  
}

Header Algorithm Types:

  • Symmetric Algorithms - This algorithm type uses a single secret key to both sign and verify the JWT token. For example: HMAC algorithms.
  • Asymmetric Algorithms - This algorithm type uses a private key to sign the token and a public key to verify the signature. For example: RSA and ECDSA algorithms.

alg Value

Digital Signature or MAC Algorithm

AlgoDescriptionHS256HMAC using SHA-256 hash algorithmHS384HMAC using SHA-384 hash algorithmHS512HMAC using SHA-512 hash algorithmRS256RSASSA using SHA-256 hash algorithmRS384RSASSA using SHA-384 hash algorithmRS512RSASSA using SHA-512 hash algorithmES256ECDSA using P-256 curve and SHA-256 hash algorithmES384ECDSA using P-384 curve and SHA-384 hash algorithmES512ECDSA using P-521 curve and SHA-512 hash algorithm

The Base64Url-encoded Header**,** which is first part of our JWT, looks like the following:

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9

Payload

The Payload, also known as the JWT claim, contains all of the information we want to transmit.

Different types of claims can be used to build the Payload:

  • Registered Claim - These claims are optional but recommended as they contain some metadata about the token:

CodeNameDescriptionississuerIdentifies the principal that issued the JWT.subsubjectIdentifies the principal that is the subject of the JWT.audaudienceIdentifies the recipients that the JWT is intended for.expExpiration timeIdentifies the expiration time on or after which the JWT MUST NOT be accepted for processing.nbfNot beforeIdentifies the time before which the JWT MUST NOT be accepted for processing.iatIssue atIdentifies the time at which the JWT was issued.jtiJWT idUnique identifier for the JWT, can be used to prevent the JWT from being replayed.

  • Public Claim - These claims are defined by you, such as user name, and other important information.
  • Private Claim - A producer and consumer may agree to use claim names that are private. These are subject to collision, so use them with caution.

Example Payload:

{  
 "sub": "1234567890",  
 "name": "Frank Emic",  
 "jti": "4b5fcea6-2a5e-4a9d-97f2-3d8631ea2c5a",  
 "iat": 1521191902,  
 "exp": 1521195630  
}

This example contains a combination of registered and public claims. “sub”,”jti”,”iat”, and “exp” are registered claims and “name” is a public claim.

#json #token #web