Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Reviewed the ReadMe.md for better implementation understanding #848

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Reviewed the ReadMe.md for better implementation understanding #848

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
29 changes: 16 additions & 13 deletions README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,9 @@ $ npm install jsonwebtoken
> If `payload` is not a buffer or a string, it will be coerced into a string using `JSON.stringify`.

`secretOrPrivateKey` is a string, buffer, or object containing either the secret for HMAC algorithms or the PEM
encoded private key for RSA and ECDSA. In case of a private key with passphrase an object `{ key, passphrase }` can be used (based on [crypto documentation](https://nodejs.org/api/crypto.html#crypto_sign_sign_private_key_output_format)), in this case be sure you pass the `algorithm` option.
encoded private key for RSA and ECDSA.
`secretOrPublicKey` can either be hardcoded or stored in the .env file. For best practice, it should be stored in the .env file
In case of a private key with passphrase an object `{ key, passphrase }` can be used (based on [crypto documentation](https://nodejs.org/api/crypto.html#crypto_sign_sign_private_key_output_format)), in this case be sure you pass the `algorithm` option.

`options`:

Expand Down Expand Up @@ -66,7 +68,7 @@ Synchronous Sign with default (HMAC SHA256)

```js
var jwt = require('jsonwebtoken');
var token = jwt.sign({ foo: 'bar' }, 'shhhhh');
var token = jwt.sign({ foo: 'bar' }, 'secretOrPrivateKey');
```

Synchronous Sign with RSA SHA256
Expand All @@ -85,7 +87,7 @@ jwt.sign({ foo: 'bar' }, privateKey, { algorithm: 'RS256' }, function(err, token

Backdate a jwt 30 seconds
```js
var older_token = jwt.sign({ foo: 'bar', iat: Math.floor(Date.now() / 1000) - 30 }, 'shhhhh');
var older_token = jwt.sign({ foo: 'bar', iat: Math.floor(Date.now() / 1000) - 30 }, 'secretOrPrivateKey');
```

#### Token Expiration (exp claim)
Expand All @@ -102,21 +104,21 @@ Signing a token with 1 hour of expiration:
jwt.sign({
exp: Math.floor(Date.now() / 1000) + (60 * 60),
data: 'foobar'
}, 'secret');
}, 'secretOrPrivateKey');
```

Another way to generate a token like this with this library is:

```javascript
jwt.sign({
data: 'foobar'
}, 'secret', { expiresIn: 60 * 60 });
}, 'secretOrPrivateKey', { expiresIn: 60 * 60 });

//or even better:

jwt.sign({
data: 'foobar'
}, 'secret', { expiresIn: '1h' });
}, 'secretOrPrivateKey', { expiresIn: '1h' });
```

### jwt.verify(token, secretOrPublicKey, [options, callback])
Expand All @@ -131,6 +133,7 @@ jwt.sign({

`secretOrPublicKey` is a string or buffer containing either the secret for HMAC algorithms, or the PEM
encoded public key for RSA and ECDSA.
`secretOrPublicKey` can either be hardcoded or stored in the .env file. For best practice, it should be stored in the .env file
If `jwt.verify` is called asynchronous, `secretOrPublicKey` can be a function that should fetch the secret or public key. See below for a detailed example

As mentioned in [this comment](https://github.com/auth0/node-jsonwebtoken/issues/208#issuecomment-231861138), there are other libraries that expect base64 encoded secrets (random bytes encoded using base64), if that is your case you can pass `Buffer.from(secret, 'base64')`, by doing this the secret will be decoded using base64 and the token verification will use the original random bytes.
Expand All @@ -155,23 +158,23 @@ As mentioned in [this comment](https://github.com/auth0/node-jsonwebtoken/issues

```js
// verify a token symmetric - synchronous
var decoded = jwt.verify(token, 'shhhhh');
var decoded = jwt.verify(token, 'secretOrPrivateKey');
console.log(decoded.foo) // bar

// verify a token symmetric
jwt.verify(token, 'shhhhh', function(err, decoded) {
jwt.verify(token, 'secretOrPrivateKey', function(err, decoded) {
console.log(decoded.foo) // bar
});

// invalid token - synchronous
try {
var decoded = jwt.verify(token, 'wrong-secret');
var decoded = jwt.verify(token, 'wrong-secretOrPrivateKey');
} catch(err) {
// err
}

// invalid token
jwt.verify(token, 'wrong-secret', function(err, decoded) {
jwt.verify(token, 'wrong-secretOrPrivateKey', function(err, decoded) {
// err
// decoded undefined
});
Expand Down Expand Up @@ -279,7 +282,7 @@ Error object:
* expiredAt: [ExpDate]

```js
jwt.verify(token, 'shhhhh', function(err, decoded) {
jwt.verify(token, 'secretOrPrivateKey', function(err, decoded) {
if (err) {
/*
err = {
Expand Down Expand Up @@ -307,7 +310,7 @@ Error object:
* 'jwt subject invalid. expected: [OPTIONS SUBJECT]'

```js
jwt.verify(token, 'shhhhh', function(err, decoded) {
jwt.verify(token, 'secretOrPrivateKey', function(err, decoded) {
if (err) {
/*
err = {
Expand All @@ -329,7 +332,7 @@ Error object:
* date: 2018-10-04T16:10:44.000Z

```js
jwt.verify(token, 'shhhhh', function(err, decoded) {
jwt.verify(token, 'secretOrPrivateKey', function(err, decoded) {
if (err) {
/*
err = {
Expand Down