+ docbytes = StrLength(ReplyBuf);
+
+ /*
+ * The response from the server will be one of:
+ *
+ * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
+ * attribute, X-XRDS-Location,
+ */
+ /* FIXME handle this somehow */
+
+ /*
+ * Option 2: HTTP response-headers that include an X-XRDS-Location response-header,
+ * together with a document.
+ * Option 3: HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
+ * a contenttype response-header specifying MIME media type,
+ * application/xrds+xml, or both.
+ *
+ * If the X-XRDS-Location header was delivered, we know about it at this point...
+ */
+ if ( (x_xrds_location)
+ && (strcmp(ChrPtr(x_xrds_location), ChrPtr(YadisURL)))
+ ) {
+ syslog(LOG_DEBUG, "X-XRDS-Location: %s ... recursing!", ChrPtr(x_xrds_location));
+ return_value = perform_openid2_discovery(x_xrds_location);
+ FreeStrBuf(&x_xrds_location);
+ }
+
+ /*
+ * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
+ */
+ else if (docbytes >= 0) {
+ return_value = parse_xrds_document(ReplyBuf);
+ }
+
+ /*
+ * Option 5: if all else fails, attempt HTML based discovery.
+ */
+ if (return_value == 0) {
+ syslog(LOG_DEBUG, "Attempting HTML discovery");
+ if (oiddata->op_url == NULL) {
+ oiddata->op_url = NewStrBuf();
+ }
+ extract_link(oiddata->op_url, HKEY("openid2.provider"), ReplyBuf);
+ if (StrLength(oiddata->op_url) > 0) {
+ syslog(LOG_DEBUG, "\033[31mOP VIA HTML DISCO: %s\033[0m", ChrPtr(oiddata->op_url));
+ return_value = 1;
+ }
+ }
+
+ if (ReplyBuf != NULL) {
+ FreeStrBuf(&ReplyBuf);
+ }
+ return(return_value);
+}
+
+
+/*
+ * Setup an OpenID authentication
+ */
+void cmd_oids(char *argbuf) {
+ struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
+ const char *Pos = NULL;
+ StrBuf *ArgBuf = NULL;
+ StrBuf *ReplyBuf = NULL;
+ StrBuf *return_to = NULL;
+ StrBuf *trust_root = NULL;
+ StrBuf *openid_delegate = NULL;
+ StrBuf *RedirectUrl = NULL;
+ ctdl_openid *oiddata;
+ int discovery_succeeded = 0;
+
+ Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
+
+ CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
+ if (oiddata == NULL) {
+ syslog(LOG_ALERT, "malloc() failed: %s", strerror(errno));
+ cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
+ return;
+ }
+ memset(oiddata, 0, sizeof(ctdl_openid));
+ CCC->openid_data = (void *) oiddata;
+
+ ArgBuf = NewStrBufPlain(argbuf, -1);
+
+ oiddata->verified = 0;
+ oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
+ trust_root = NewStrBufPlain(NULL, StrLength(ArgBuf));
+ return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
+
+ StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
+ StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
+ StrBufExtract_NextToken(trust_root, ArgBuf, &Pos, '|');
+
+ syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
+
+
+ /********** OpenID 2.0 section 7.3 - Discovery **********/
+
+ /* Section 7.3.1 says we have to attempt XRI based discovery.
+ * No one is using this, no one is asking for it, no one wants it.
+ * So we're not even going to bother attempting this mode.
+ */
+
+ /* Attempt section 7.3.2 (Yadis discovery) and section 7.3.3 (HTML discovery);
+ */
+ discovery_succeeded = perform_openid2_discovery(oiddata->claimed_id);
+
+ /* Empty delegate is legal; we just use the openid_url instead */
+ if (StrLength(openid_delegate) == 0) {
+ StrBufPlain(openid_delegate, SKEY(oiddata->claimed_id));
+ }
+
+ if (StrLength(oiddata->op_url) == 0) {
+ cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
+ }
+
+ else {
+
+ /* Assemble a URL to which the user-agent will be redirected. */
+
+ RedirectUrl = NewStrBufDup(oiddata->op_url);
+
+ StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.mode=checkid_setup"
+ "&openid.identity="), 0);
+ StrBufUrlescAppend(RedirectUrl, openid_delegate, NULL);
+
+ StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
+ StrBufUrlescAppend(RedirectUrl, return_to, NULL);
+
+ StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.trust_root="), 0);
+ StrBufUrlescAppend(RedirectUrl, trust_root, NULL);
+
+ StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.sreg.optional="), 0);
+ StrBufUrlescAppend(RedirectUrl, NULL, "nickname,email,fullname,postcode,country,dob,gender");
+
+ cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
+ }
+
+ FreeStrBuf(&ArgBuf);
+ FreeStrBuf(&ReplyBuf);
+ FreeStrBuf(&return_to);
+ FreeStrBuf(&trust_root);
+ FreeStrBuf(&openid_delegate);
+ FreeStrBuf(&RedirectUrl);