/*
* indicate whether the incoming HTTP GET request is an OpenID Connect Authorization Response
*/
apr_byte_t oidc_proto_is_redirect_authorization_response(request_rec *r,
oidc_cfg *cfg) {
/* prereq: this is a call to the configured redirect_uri; see if it is a GET with state and id_token or code parameters */
return ((r->method_number == M_GET)
&& oidc_util_request_has_parameter(r, "state")
&& (oidc_util_request_has_parameter(r, "id_token")
|| oidc_util_request_has_parameter(r, "code")));
}
/*
* main routine: handle OAuth 2.0 authentication/authorization
*/
int oidc_oauth_check_userid(request_rec *r, oidc_cfg *c) {
/* check if this is a sub-request or an initial request */
if (!ap_is_initial_req(r)) {
if (r->main != NULL)
r->user = r->main->user;
else if (r->prev != NULL)
r->user = r->prev->user;
if (r->user != NULL) {
/* this is a sub-request and we have a session */
oidc_debug(r,
"recycling user '%s' from initial request for sub-request",
r->user);
return OK;
}
/* check if this is a request for the public (encryption) keys */
} else if ((c->redirect_uri != NULL)
&& (oidc_util_request_matches_url(r, c->redirect_uri))) {
if (oidc_util_request_has_parameter(r, "jwks")) {
return oidc_handle_jwks(r, c);
}
}
/* we don't have a session yet */
/* get the bearer access token from the Authorization header */
const char *access_token = NULL;
if (oidc_oauth_get_bearer_token(r, &access_token) == FALSE)
return HTTP_UNAUTHORIZED;
/* validate the obtained access token against the OAuth AS validation endpoint */
json_t *token = NULL;
char *s_token = NULL;
/* check if an introspection endpoint is set */
if (c->oauth.introspection_endpoint_url != NULL) {
/* we'll validate the token remotely */
if (oidc_oauth_resolve_access_token(r, c, access_token, &token,
&s_token) == FALSE)
return HTTP_UNAUTHORIZED;
} else {
/* no introspection endpoint is set, assume the token is a JWT and validate it locally */
if (oidc_oauth_validate_jwt_access_token(r, c, access_token, &token,
&s_token) == FALSE)
return HTTP_UNAUTHORIZED;
}
/* check that we've got something back */
if (token == NULL) {
oidc_error(r, "could not resolve claims (token == NULL)");
return HTTP_UNAUTHORIZED;
}
/* store the parsed token (cq. the claims from the response) in the request state so it can be accessed by the authz routines */
oidc_request_state_set(r, OIDC_CLAIMS_SESSION_KEY, (const char *) s_token);
/* set the REMOTE_USER variable */
if (oidc_oauth_set_remote_user(r, c, token) == FALSE) {
oidc_error(r,
"remote user could not be set, aborting with HTTP_UNAUTHORIZED");
return HTTP_UNAUTHORIZED;
}
/* get a handle to the director config */
oidc_dir_cfg *dir_cfg = ap_get_module_config(r->per_dir_config,
&auth_openidc_module);
/* set the user authentication HTTP header if set and required */
if ((r->user != NULL) && (dir_cfg->authn_header != NULL)) {
oidc_debug(r, "setting authn header (%s) to: %s", dir_cfg->authn_header,
r->user);
apr_table_set(r->headers_in, dir_cfg->authn_header, r->user);
}
/* set the resolved claims in the HTTP headers for the target application */
oidc_util_set_app_infos(r, token, c->claim_prefix, c->claim_delimiter,
dir_cfg->pass_info_in_headers, dir_cfg->pass_info_in_env_vars);
/* set the access_token in the app headers */
if (access_token != NULL) {
oidc_util_set_app_info(r, "access_token", access_token,
OIDC_DEFAULT_HEADER_PREFIX, dir_cfg->pass_info_in_headers,
dir_cfg->pass_info_in_env_vars);
}
/* free JSON resources */
json_decref(token);
return OK;
}