fix(auth): support pkce when using basic auth header (#7038)

* support pkce when using basic auth header

* test(auth): useBasicAuthenticationWithAccessCodeGrant + usePkceWithAuthorizationCodeGrant

test/unit/core/oauth2-authorize.js

@@ -112,6 +112,40 @@ describe("oauth2", () => {
       createCodeChallengeSpy.mockReset()
     })
 
+
+    it("should send code_challenge when using accessCode flow with usePkceWithAuthorizationCodeGrant enabled", () => {
+      const windowOpenSpy = jest.spyOn(win, "open")
+      mockSchema.flow = "accessCode"
+
+      const expectedCodeVerifier = "mock_code_verifier"
+      const expectedCodeChallenge = "mock_code_challenge"
+
+      const generateCodeVerifierSpy = jest.spyOn(utils, "generateCodeVerifier").mockImplementation(() => expectedCodeVerifier)
+      const createCodeChallengeSpy = jest.spyOn(utils, "createCodeChallenge").mockImplementation(() => expectedCodeChallenge)
+
+      authConfig.authConfigs.useBasicAuthenticationWithAccessCodeGrant = true
+      authConfig.authConfigs.usePkceWithAuthorizationCodeGrant = true
+
+      oauth2Authorize(authConfig)
+      expect(win.open.mock.calls.length).toEqual(1)
+
+      const actualUrl = new URLSearchParams(win.open.mock.calls[0][0])
+      expect(actualUrl.get("code_challenge")).toBe(expectedCodeChallenge)
+      expect(actualUrl.get("code_challenge_method")).toBe("S256")
+
+      expect(createCodeChallengeSpy.mock.calls.length).toEqual(1)
+      expect(createCodeChallengeSpy.mock.calls[0][0]).toBe(expectedCodeVerifier)
+
+      // The code_verifier should be stored to be able to send in
+      // on the TokenUrl call
+      expect(authConfig.auth.codeVerifier).toBe(expectedCodeVerifier)
+
+      // Restore spies
+      windowOpenSpy.mockReset()
+      generateCodeVerifierSpy.mockReset()
+      createCodeChallengeSpy.mockReset()
+    })
+
     it("should send code_challenge when using authorization_code flow with usePkceWithAuthorizationCodeGrant enabled", () => {
       const windowOpenSpy = jest.spyOn(win, "open")
       mockSchema.flow = "authorization_code"

test/unit/core/plugins/auth/actions.js

@@ -7,6 +7,7 @@ import {
   logoutWithPersistOption,
   persistAuthorizationIfNeeded
 } from "corePlugins/auth/actions"
+import { authorizeAccessCodeWithBasicAuthentication } from "../../../../../src/core/plugins/auth/actions"
 
 describe("auth plugin - actions", () => {
 
@@ -178,26 +179,31 @@ describe("auth plugin - actions", () => {
 
   describe("tokenRequest", function () {
     it("should send the code verifier when set", () => {
-      const data = {
-        auth: {
-          schema: {
-            get: () => "http://tokenUrl"
+      const testCodeVerifierForAuthorizationCodeFlows = (flowAction) =>  {
+        const data = {
+          auth: {
+            schema: {
+              get: () => "http://tokenUrl",
+            },
+            codeVerifier: "mock_code_verifier",
           },
-          codeVerifier: "mock_code_verifier"
-        },
-        redirectUrl: "http://google.com"
+          redirectUrl: "http://google.com",
+        }
+
+        const authActions = {
+          authorizeRequest: jest.fn(),
+        }
+
+        flowAction(data)({ authActions })
+
+        expect(authActions.authorizeRequest.mock.calls.length).toEqual(1)
+        const actualArgument = authActions.authorizeRequest.mock.calls[0][0]
+        expect(actualArgument.body).toContain("code_verifier=" + data.auth.codeVerifier)
+        expect(actualArgument.body).toContain("grant_type=authorization_code")
       }
 
-      const authActions = {
-        authorizeRequest: jest.fn()
-      }
-
-      authorizeAccessCodeWithFormParams(data)({ authActions })
-
-      expect(authActions.authorizeRequest.mock.calls.length).toEqual(1)
-      const actualArgument = authActions.authorizeRequest.mock.calls[0][0]
-      expect(actualArgument.body).toContain("code_verifier=" + data.auth.codeVerifier)
-      expect(actualArgument.body).toContain("grant_type=authorization_code")
+      testCodeVerifierForAuthorizationCodeFlows(authorizeAccessCodeWithFormParams)
+      testCodeVerifierForAuthorizationCodeFlows(authorizeAccessCodeWithBasicAuthentication)
     })
   })
 
@@ -278,7 +284,7 @@ describe("auth plugin - actions", () => {
         localStorage.clear()
       })
       it("should skip if `persistAuthorization` is turned off", () => {
-        // Given        
+        // Given
         const system = {
           getConfigs: () => ({
             persistAuthorization: false