GoLang_Authentication_Practise

Pre-Requisite:

• Visual Studio Code
  
• Install Go from https://go.dev/
  
• Postman app from https://www.postman.com/downloads/
  

Check Go Configuaration using VS Terminal by running below commands

• go --version
  
• go env
  

Code Practises

1. Marshal Sample -- Converting Objects to json
   

2. Unmarshal Sample -- Converting json to objects
   

3. Encode and Decode Sample Program
   

4. Storingpassword Sample Program using bcrypt
   

   for more password encryption golang examples
   

   https://golang.hotexamples.com/examples/golang.org.x.crypto.scrypt/-/Key/golang-key-function-examples.html
   

5. HMAC Sample - Hash Message Authentication Code (HMAC) as defined in U.S. Federal Information Processing Standards Publication 198. An HMAC is a cryptographic hash that uses a key to sign a message. The receiver verifies the hash by recomputing it using the same key.
   

6. HMAC Sample 2- with Client Response and Saved Key in Cookie
   

7. JWT -

   JWT INTRO - https://github.com/golang-jwt/jwt
   

   Hint:
   type UserClaims struct { jwt.StandardClaims SessionID int64 } after typing above code run go mod tidy and restart your VS to get the jwt intellisense.
   

   to know more about JWT in GoLang visit https://learn.vonage.com/blog/2020/03/13/using-jwt-for-authentication-in-a-golang-application-dr/
   

   for encode and decode jwt tokens vsiit https://jwt.io/
   

   for uuid in goLang download package using go get github.com/gofrs/uuid

8. base64 encode-decode
   

9. Crypto Sample
   

10. Crypto Sample - Abstract encrypt writer function
    

11. HMAC Cookie Sample
    

12. HMAC Cookie Sample2 -- Logged in and Not
    

13. JWT Cookie Sample -- Save JWT Token in Cookie and validate authentication.

14. UserLoginRegistration -- Save Password in bcrypt

Output Screenshots:

1. Marshal Sample
   
   
2. UnMarshaling Sample
   
   
3. Encode and Decode Sample Program
   
   Encode postman Request:
   
   Decode postman Request:
   
   
4. Storingpassword Sample Program using bcrypt
   
   
5. HMAC Sample
   
   
6. HMAC Sample 2
   
   
7. JWT Sample
   
   
   
8. base64 encode-decode
   
   
9. Crypto Sample
   
   
10. Crypto Sample - Abstract encrypt writer function
    
    
11. HMAC Cookie Sample
    
    
12. HMAC Cookie Sample2 -- Logged in and Not
    
    
    
13. JWT Cookie Sample
    
    
    
14. UserLoginRegistration