PKCEHelper

All Implemented Interfaces:
```
public final class PKCEHelper

                    
```
Proof Key for Code Exchange (PKCE) by OAuth 2.0 public clients.
Where an OpenID Connect service provider has configured PKCE for authorization code-flow operations, generate a code verifier and code challenge.
For example:
<pre> {@code val codeVerifier = PKCE.generateCodeVerifier() val codeChallenge = PKCE.generateCodeChallenge(codeVerifier) print("SHA256 hash of codeVerifier: $codeChallenge") } </pre>

Since:

3.0.0

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description
`PKCEHelper()`

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`final static String`	`generateCodeVerifier()`	Generates a cryptographically random string that is used to correlate the authorization request to the token request.
`final static String`	`generateCodeChallenge(String codeVerifier)`	A challenge derived from the code verifier that is sent in the authorization request, to be verified against later.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PKCEHelper
```
PKCEHelper()
```
- Method Detail
  - generateCodeVerifier
```
 final static String generateCodeVerifier()
```
    Generates a cryptographically random string that is used to correlate the authorization request to the token request.
    
    Returns:
    
    Cryptographically random string
    
    Since:
    
    3.0.0
  - generateCodeChallenge
```
 final static String generateCodeChallenge(String codeVerifier)
```
    A challenge derived from the code verifier that is sent in the authorization request, to be verified against later.
    
    Parameters:
    
    codeVerifier - : A cryptographically random string.
    
    Returns:
    
    Base-64 URL encoded string
    
    Since:
    
    3.0.0