Github user alopresto commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2047#discussion_r130748112
--- Diff:
nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-api/src/main/java/org/apache/nifi/web/api/AccessResource.java
---
@@ -125,6 +142,160 @@ public Response getLoginConfig(@Context
HttpServletRequest httpServletRequest) {
return generateOkResponse(entity).build();
}
+ @GET
+ @Consumes(MediaType.WILDCARD)
+ @Produces(MediaType.WILDCARD)
+ @Path("oidc/request")
+ @ApiOperation(
+ value = "Initiates a request to authenticate through the
configured OpenId Connect provider."
+ )
+ public void oidcRequest(@Context HttpServletRequest
httpServletRequest, @Context HttpServletResponse httpServletResponse) throws
Exception {
+ // only consider user specific access over https
+ if (!httpServletRequest.isSecure()) {
+ forwardToMessagePage(httpServletRequest, httpServletResponse,
"User authentication/authorization is only supported when running over HTTPS.");
+ return;
+ }
+
+ // ensure oidc is enabled
+ if (!oidcService.isOidcEnabled()) {
+ forwardToMessagePage(httpServletRequest, httpServletResponse,
"OpenId Connect is not configured.");
+ return;
+ }
+
+ final String oidcRequestIdentifier = UUID.randomUUID().toString();
+
+ // generate a cookie to associate this login sequence
+ final Cookie cookie = new Cookie(OIDC_REQUEST_IDENTIFIER,
oidcRequestIdentifier);
+ cookie.setPath("/");
+ cookie.setHttpOnly(true);
+ cookie.setMaxAge(60);
+ cookie.setSecure(true);
+ httpServletResponse.addCookie(cookie);
+
+ // get the state for this request
+ final State state = oidcService.createState(oidcRequestIdentifier);
+
+ // build the authorization uri
+ final URI authorizationUri =
UriBuilder.fromUri(oidcService.getAuthorizationEndpoint())
+ .queryParam("client_id", oidcService.getClientId())
+ .queryParam("response_type", "code")
+ .queryParam("scope", oidcService.getScope().toString())
+ .queryParam("state", state.getValue())
+ .queryParam("redirect_uri", getOidcCallback())
+ .build();
+
+ // generate the response
+ httpServletResponse.sendRedirect(authorizationUri.toString());
+ }
+
+ @GET
+ @Consumes(MediaType.WILDCARD)
+ @Produces(MediaType.WILDCARD)
+ @Path("oidc/callback")
+ @ApiOperation(
+ value = "Redirect/callback URI for processing the result of
the OpenId Connect login sequence."
+ )
+ public void oidcCallback(@Context HttpServletRequest
httpServletRequest, @Context HttpServletResponse httpServletResponse) throws
Exception {
+ // only consider user specific access over https
+ if (!httpServletRequest.isSecure()) {
+ forwardToMessagePage(httpServletRequest, httpServletResponse,
"User authentication/authorization is only supported when running over HTTPS.");
+ return;
+ }
+
+ // ensure oidc is enabled
+ if (!oidcService.isOidcEnabled()) {
+ forwardToMessagePage(httpServletRequest, httpServletResponse,
"OpenId Connect is not configured.");
+ return;
+ }
+
+ final String oidcRequestIdentifier =
getCookieValue(httpServletRequest.getCookies(), OIDC_REQUEST_IDENTIFIER);
+ if (oidcRequestIdentifier == null) {
+ forwardToMessagePage(httpServletRequest, httpServletResponse,
"The login request identifier was not found in the request. Unable to
continue.");
+ return;
+ }
+
+ final com.nimbusds.openid.connect.sdk.AuthenticationResponse
oidcResponse = AuthenticationResponseParser.parse(getRequestUri());
+ if (oidcResponse.indicatesSuccess()) {
+ final AuthenticationSuccessResponse successfulOidcResponse =
(AuthenticationSuccessResponse) oidcResponse;
+
+ // confirm state
+ final State state = successfulOidcResponse.getState();
+ if (!oidcService.isStateValid(oidcRequestIdentifier, state)) {
+ logger.error("Purposed state does not match the stored
state. Unable to continue login process.");
+
+ // remove the oidc request cookie
+ removeOidcRequestCookie(httpServletResponse);
+
+ // forward to the error page
+ forwardToMessagePage(httpServletRequest,
httpServletResponse, "Purposed state does not match the stored state. Unable to
continue login process.");
+ return;
+ }
+
+ try {
+ // exchange authorization code for id token
+ final AuthorizationCode authorizationCode =
successfulOidcResponse.getAuthorizationCode();
+ final AuthorizationGrant authorizationGrant = new
AuthorizationCodeGrant(authorizationCode, URI.create(getOidcCallback()));
+
oidcService.exchangeAuthorizationCode(oidcRequestIdentifier,
authorizationGrant);
+ } catch (final Exception e) {
+ logger.error("Unable to exchange authorization for ID
token: " + e.getMessage(), e);
+
+ // remove the oidc request cookie
+ removeOidcRequestCookie(httpServletResponse);
+
+ // forward to the error page
+ forwardToMessagePage(httpServletRequest,
httpServletResponse, "Unable to exchange authorization for ID token: " +
e.getMessage());
+ return;
+ }
+
+ // redirect to the name page
+ httpServletResponse.sendRedirect("../../../nifi");
+ } else {
+ // remove the oidc request cookie
+ removeOidcRequestCookie(httpServletResponse);
+
+ // report the unsuccessful login
+ final AuthenticationErrorResponse errorOidcResponse =
(AuthenticationErrorResponse) oidcResponse;
+ forwardToMessagePage(httpServletRequest, httpServletResponse,
"Unsuccessful login attempt: " +
errorOidcResponse.getErrorObject().getDescription());
+ }
+ }
+
+ @POST
+ @Consumes(MediaType.WILDCARD)
+ @Produces(MediaType.TEXT_PLAIN)
+ @Path("oidc/exchange")
+ @ApiOperation(
+ value = "Retrieves a JWT following a successful login sequence
using the configured OpenId Connect provider.",
+ response = String.class
+ )
+ public Response oidcExchange(@Context HttpServletRequest
httpServletRequest, @Context HttpServletResponse httpServletResponse) throws
Exception {
+ // only consider user specific access over https
+ if (!httpServletRequest.isSecure()) {
+ throw new IllegalStateException("User
authentication/authorization is only supported when running over HTTPS.");
+ }
+
+ // ensure oidc is enabled
+ if (!oidcService.isOidcEnabled()) {
+ throw new IllegalStateException("OpenId Connect is not
configured.");
+ }
+
+ final String oidcRequestIdentifier =
getCookieValue(httpServletRequest.getCookies(), OIDC_REQUEST_IDENTIFIER);
+ if (oidcRequestIdentifier == null) {
--- End diff --
Same comment as above re: validating cookie value.
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