In Annular, the following Steps are used to
building authentication and authorization for RESTful APIs and applications. It
might help you -
1. The
users send their credentials to the server which is verified by the database
credentials. If everything is verified successfully, the JWT is sent back to
them.
2. The
JWT is saved in the user's browser in local storage or in a cookie and so on.
3. The
presence of a JWT saved in the browser is used as an indicator that a user is
currently logged in.
4. The
expiry time of JWT is continually checked to maintain an authenticated state in
the Angular applications.
5. The
client side routes are protected and access by authenticated users only.
6. When
user sends the XHR requests for APIs, the JWT gets sent an Authorization header
using your cookies or Bearer.
7. When
XHR requests coming on the server, before send back the responses it’s validated
first with configured app's secret keys. If everything is looking good then returns
successfully responses other send the back to the bad request.
There are several open source libraries are available
for angular which are helps with JWTs and has the ability to Decode the JWT, Authorization
header to XHR requests and so on.
What
is JSON Web Token?
JSON Web Token (JWT) is an open
standard which used for securely transmitting information between parties as a
JSON object.
The JWTs can be signed with -
1. HMAC algorithm
2. RSA algorithm
When
should you use JSON Web Tokens?
There are some scenarios where we can
used JSON Web Tokens -
1. Authentication
2. Information
Exchange
What
is the JSON Web Token structure?
The JSON Web Tokens consist of three
parts separated by dots (.), which are:
1. Header
2. Payload
3. Signature
A JWT typically looks like –
######.######.######
Let's break down the different parts -
Header –
{
"alg": "HS256",
"typ": "JWT"
}
//OR
{
"alg": "RS256",
"typ": "JWT"
}
Payload –
{
"sub": "1234567890",
"name": "Anil
Singh",
"admin":
true
}
Signature –
HMACSHA256(base64UrlEncode(header)
+ "." + base64UrlEncode(payload), secret);
I hope you are enjoying with this post!
Please share with you friends!! Thank you!!!