X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fmodules%2Fopenid%2Fserv_openid_rp.c;h=bdb945df6ecec9ecdde952d7af67eaf30993ea60;hb=13a8c2159a8b51d744772ca21b67407ebd3b1de5;hp=a802a6c58da19210e2fbe3d45d01d0d251305de9;hpb=3a6fead47ff6da68fbf1e8b1204a9cc59289a7f3;p=citadel.git diff --git a/citadel/modules/openid/serv_openid_rp.c b/citadel/modules/openid/serv_openid_rp.c index a802a6c58..bdb945df6 100644 --- a/citadel/modules/openid/serv_openid_rp.c +++ b/citadel/modules/openid/serv_openid_rp.c @@ -1,11 +1,9 @@ /* - * $Id$ + * This is an implementation of OpenID 2.0 RELYING PARTY SUPPORT CURRENTLY B0RKEN AND BEING DEVEL0PZ0RED * - * This is an implementation of OpenID 1.1 Relying Party support, in stateless mode. + * Copyright (c) 2007-2011 by the citadel.org team * - * Copyright (c) 2007-2010 by the citadel.org team - * - * This program is free software; you can redistribute it and/or modify + * This program is open source software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. @@ -16,8 +14,7 @@ * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * along with this program; if not, see . */ #include "sysdep.h" @@ -45,6 +42,7 @@ #include #include #include +#include #include "ctdl_module.h" #include "config.h" #include "citserver.h" @@ -76,7 +74,7 @@ void openid_cleanup_function(void) { struct CitContext *CCC = CC; /* CachedCitContext - performance boost */ if (CCC->openid_data != NULL) { - CtdlLogPrintf(CTDL_DEBUG, "Clearing OpenID session state\n"); + syslog(LOG_DEBUG, "Clearing OpenID session state"); Free_ctdl_openid((ctdl_openid **) &CCC->openid_data); } } @@ -127,11 +125,11 @@ int attach_openid(struct ctdluser *who, StrBuf *claimed_id) cdb_free(cdboi); if (fetched_usernum == who->usernum) { - CtdlLogPrintf(CTDL_INFO, "%s already associated; no action is taken\n", claimed_id); + syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id)); return(0); } else { - CtdlLogPrintf(CTDL_INFO, "%s already belongs to another user\n", claimed_id); + syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id)); return(3); } } @@ -150,7 +148,7 @@ int attach_openid(struct ctdluser *who, StrBuf *claimed_id) snprintf(buf, sizeof buf, "User <%s> (#%ld) has claimed the OpenID URL %s\n", who->fullname, who->usernum, ChrPtr(claimed_id)); CtdlAideMessage(buf, "OpenID claim"); - CtdlLogPrintf(CTDL_INFO, "%s", buf); + syslog(LOG_INFO, "%s", buf); return(0); } @@ -172,7 +170,6 @@ void openid_purge(struct ctdluser *usbuf) { keys = NewHash(1, NULL); if (!keys) return; - cdb_rewind(CDB_OPENID); while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) { if (cdboi->len > sizeof(long)) { @@ -190,7 +187,7 @@ void openid_purge(struct ctdluser *usbuf) { HashPos = GetNewHashPos(keys, 0); while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0) { - CtdlLogPrintf(CTDL_DEBUG, "Deleting associated OpenID <%s>\n", Value); + syslog(LOG_DEBUG, "Deleting associated OpenID <%s>", (char*)Value); cdb_delete(CDB_OPENID, Value, strlen(Value)); /* note: don't free(Value) -- deleting the hash list will handle this for us */ } @@ -199,7 +196,6 @@ void openid_purge(struct ctdluser *usbuf) { } - /* * List the OpenIDs associated with the currently logged in account */ @@ -369,8 +365,6 @@ void cmd_oidc(char *argbuf) { } - - /* * Detach an OpenID from the currently logged in account */ @@ -423,11 +417,11 @@ int openid_create_user_via_sreg(StrBuf *claimed_id, HashList *sreg_keys) if (CC->logged_in) return(3); if (!GetHash(sreg_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4); - CtdlLogPrintf(CTDL_DEBUG, "The desired account name is <%s>\n", desired_name); + syslog(LOG_DEBUG, "The desired account name is <%s>", desired_name); len = cutuserkey(desired_name); if (!CtdlGetUser(&CC->user, desired_name)) { - CtdlLogPrintf(CTDL_DEBUG, "<%s> is already taken by another user.\n", desired_name); + syslog(LOG_DEBUG, "<%s> is already taken by another user.", desired_name); memset(&CC->user, 0, sizeof(struct ctdluser)); return(5); } @@ -487,7 +481,7 @@ int login_via_openid(StrBuf *claimed_id) */ void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf) { - int len, i; + int i; const char *ptr; const char *href_start = NULL; const char *href_end = NULL; @@ -510,8 +504,6 @@ void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *sou if (link_tag_end == NULL) break; for (i=0; i < 1; i++ ){ - len = link_tag_end - link_tag_start; - rel_start = cbmstrcasestr(link_tag_start, "rel="); if ((rel_start == NULL) || (rel_start > link_tag_end)) @@ -552,37 +544,23 @@ void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *sou /* - * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl. - * - * If 'normalize_len' is nonzero, the caller is specifying the buffer size of 'url', and is - * requesting that the effective (normalized) URL be copied back to it. + * Wrapper for curl_easy_init() that includes the options common to all calls + * used in this module. */ -int fetch_http(StrBuf *url, StrBuf **target_buf) -{ - StrBuf *ReplyBuf; +CURL *ctdl_openid_curl_easy_init(char *errmsg) { CURL *curl; - CURLcode res; - char errmsg[1024] = ""; - char *effective_url = NULL; - - if (StrLength(url) <=0 ) return(-1); - ReplyBuf = *target_buf = NewStrBuf (); - if (ReplyBuf == 0) return(-1); curl = curl_easy_init(); if (!curl) { - CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n"); - return(-1); + return(curl); } - curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(url)); curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0); curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0); - curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf); - curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback); - - curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg); + if (errmsg) { + curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg); + } curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1); #ifdef CURLOPT_HTTP_CONTENT_DECODING curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1); @@ -590,6 +568,7 @@ int fetch_http(StrBuf *url, StrBuf **target_buf) #endif curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL); curl_easy_setopt(curl, CURLOPT_TIMEOUT, 180); /* die after 180 seconds */ + if ( (!IsEmptyStr(config.c_ip_addr)) && (strcmp(config.c_ip_addr, "*")) @@ -598,9 +577,36 @@ int fetch_http(StrBuf *url, StrBuf **target_buf) ) { curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr); } - res = curl_easy_perform(curl); - if (res) { - CtdlLogPrintf(CTDL_DEBUG, "fetch_http() libcurl error %d: %s\n", res, errmsg); + + return(curl); +} + + +/* + * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl. + */ +int fetch_http(StrBuf *url, StrBuf **target_buf) +{ + StrBuf *ReplyBuf; + CURL *curl; + CURLcode result; + char *effective_url = NULL; + char errmsg[1024] = ""; + + if (StrLength(url) <=0 ) return(-1); + ReplyBuf = *target_buf = NewStrBuf (); + if (ReplyBuf == 0) return(-1); + + curl = ctdl_openid_curl_easy_init(errmsg); + if (!curl) return(-1); + + curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(url)); + curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf); + curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback); + + result = curl_easy_perform(curl); + if (result) { + syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg); } curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url); StrBufPlain(url, effective_url, -1); @@ -610,6 +616,156 @@ int fetch_http(StrBuf *url, StrBuf **target_buf) } + +struct xrds { + int nesting_level; + int in_xrd; + int current_service_priority; + int selected_service_priority; /* more here later */ +}; + + +void xrds_xml_start(void *data, const char *supplied_el, const char **attr) { + struct xrds *xrds = (struct xrds *) data; + int i; + + ++xrds->nesting_level; + + if (!strcasecmp(supplied_el, "XRD")) { + ++xrds->in_xrd; + syslog(LOG_DEBUG, "*** XRD CONTAINER BEGIN ***"); + } + + else if (!strcasecmp(supplied_el, "service")) { + xrds->current_service_priority = 0; + for (i=0; attr[i] != NULL; i+=2) { + if (!strcasecmp(attr[i], "priority")) { + xrds->current_service_priority = atoi(attr[i+1]); + } + } + } +} + + +void xrds_xml_end(void *data, const char *supplied_el) { + struct xrds *xrds = (struct xrds *) data; + + --xrds->nesting_level; + + if (!strcasecmp(supplied_el, "XRD")) { + --xrds->in_xrd; + syslog(LOG_DEBUG, "*** XRD CONTAINER END ***"); + } + + else if (!strcasecmp(supplied_el, "service")) { + /* this is where we should evaluate the service and do stuff */ + xrds->current_service_priority = 0; + } +} + + +void xrds_xml_chardata(void *data, const XML_Char *s, int len) { + struct xrds *xrds = (struct xrds *) data; + + /* StrBufAppendBufPlain (xrds->CData, s, len, 0); */ +} + + +/* + * Parse an XRDS document. + * If OpenID stuff is discovered, populate FIXME something and return nonzero + * If nothing useful happened, return 0. + */ +int parse_xrds_document(StrBuf *ReplyBuf) { + struct xrds xrds; + + memset(&xrds, 0, sizeof (struct xrds)); + XML_Parser xp = XML_ParserCreate(NULL); + if (xp) { + XML_SetUserData(xp, &xrds); + XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end); + XML_SetCharacterDataHandler(xp, xrds_xml_chardata); + XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0); + XML_Parse(xp, "", 0, 1); + XML_ParserFree(xp); + } + else { + syslog(LOG_ALERT, "Cannot create XML parser"); + } + + return(0); +} + + +/* + * Attempt to perform YADIS discovery. + * If successful, returns nonzero and fills the session's claimed ID blah FIXME this comment + * If YADIS fails, returns 0 and does nothing else. + */ +int perform_yadis_discovery(StrBuf *YadisURL) { + int docbytes = (-1); + StrBuf *ReplyBuf = NULL; + int r; + CURL *curl; + CURLcode result; + /*char *effective_url = NULL;*/ + char errmsg[1024] = ""; + + if (YadisURL == NULL) return(0); + if (StrLength(YadisURL) == 0) return(0); + + ReplyBuf = NewStrBuf (); + if (ReplyBuf == 0) return(0); + + curl = ctdl_openid_curl_easy_init(errmsg); + if (!curl) return(0); + + curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(YadisURL)); + curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf); + curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback); + + result = curl_easy_perform(curl); + if (result) { + syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg); + } + /*curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url); + StrBufPlain(YadisURL, effective_url, -1);*/ + curl_easy_cleanup(curl); + + docbytes = StrLength(ReplyBuf); + if (docbytes < 0) { + return(0); + } + if (docbytes == 0) { + FreeStrBuf(&ReplyBuf); + return(0); + } + + /* FIXME here we need to handle Yadis 1.0 section 6.2.5. + * + * The response from the server will be one of: + * + * 1. An HTML document with a element that includes a element with http-equiv + * attribute, X-XRDS-Location, + * + * 2. HTTP response-headers that include an X-XRDS-Location response-header, together with a + * document + * + * 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. + * + * 4. A document of MIME media type, application/xrds+xml + * + * We are only handling case #4 here and assuming that the server returned an XRDS document. + */ + + /* Parse the XRDS document. */ + r = parse_xrds_document(ReplyBuf); + FreeStrBuf(&ReplyBuf); + return(r); +} + + /* * Setup an OpenID authentication */ @@ -621,7 +777,6 @@ void cmd_oids(char *argbuf) { StrBuf *trust_root = NULL; StrBuf *openid_delegate = NULL; StrBuf *RedirectUrl = NULL; - int i; struct CitContext *CCC = CC; /* CachedCitContext - performance boost */ ctdl_openid *oiddata; @@ -637,6 +792,7 @@ void cmd_oids(char *argbuf) { 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)); @@ -644,14 +800,27 @@ void cmd_oids(char *argbuf) { StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|'); StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|'); StrBufExtract_NextToken(trust_root, ArgBuf, &Pos, '|'); - - oiddata->verified = 0; - i = fetch_http(oiddata->claimed_id, &ReplyBuf); - CtdlLogPrintf(CTDL_DEBUG, "Normalized URL and Claimed ID is: %s\n", - ChrPtr(oiddata->claimed_id)); - if ((StrLength(ReplyBuf) > 0) && (i > 0)) { + syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id)); + + /********** OpenID 2.0 section 7.3 - Discovery **********/ + + /* First we're supposed to attempt XRI based resolution. + * 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. + */ + + /* Second we attempt YADIS. + * Google uses this so we'd better do our best to implement it. + */ + int yadis_succeeded = perform_yadis_discovery(oiddata->claimed_id); + + /* Third we attempt HTML-based discovery. Here we go! */ + if ( (yadis_succeeded == 0) + && (fetch_http(oiddata->claimed_id, &ReplyBuf) > 0) + && (StrLength(ReplyBuf) > 0) + ) { openid_delegate = NewStrBuf(); oiddata->server = NewStrBuf(); extract_link(oiddata->server, HKEY("openid.server"), ReplyBuf); @@ -701,6 +870,7 @@ void cmd_oids(char *argbuf) { return; } + FreeStrBuf(&ArgBuf); FreeStrBuf(&ReplyBuf); FreeStrBuf(&return_to); @@ -746,13 +916,13 @@ void cmd_oidf(char *argbuf) { if (len < 0) len = sizeof(thiskey) - 1; extract_token(thisdata, buf, 1, '|', sizeof thisdata); - CtdlLogPrintf(CTDL_DEBUG, "%s: [%d] %s\n", thiskey, strlen(thisdata), thisdata); + syslog(LOG_DEBUG, "%s: ["SIZE_T_FMT"] %s", thiskey, strlen(thisdata), thisdata); Put(keys, thiskey, len, strdup(thisdata), NULL); } /* Now that we have all of the parameters, we have to validate the signature against the server */ - CtdlLogPrintf(CTDL_DEBUG, "About to validate the signature...\n"); + syslog(LOG_DEBUG, "About to validate the signature..."); CURL *curl; CURLcode res; @@ -773,14 +943,14 @@ void cmd_oidf(char *argbuf) { CURLFORM_COPYNAME, "openid.mode", CURLFORM_COPYCONTENTS, "check_authentication", CURLFORM_END); - CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.mode", "check_authentication"); + syslog(LOG_DEBUG, "%25s : %s", "openid.mode", "check_authentication"); if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) { curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, "openid.assoc_handle", CURLFORM_COPYCONTENTS, o_assoc_handle, CURLFORM_END); - CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.assoc_handle", o_assoc_handle); + syslog(LOG_DEBUG, "%25s : %s", "openid.assoc_handle", o_assoc_handle); } if (GetHash(keys, "sig", 3, (void *) &o_sig)) { @@ -788,7 +958,7 @@ void cmd_oidf(char *argbuf) { CURLFORM_COPYNAME, "openid.sig", CURLFORM_COPYCONTENTS, o_sig, CURLFORM_END); - CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.sig", o_sig); + syslog(LOG_DEBUG, "%25s : %s", "openid.sig", o_sig); } if (GetHash(keys, "signed", 6, (void *) &o_signed)) { @@ -796,7 +966,7 @@ void cmd_oidf(char *argbuf) { CURLFORM_COPYNAME, "openid.signed", CURLFORM_COPYCONTENTS, o_signed, CURLFORM_END); - CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.signed", o_signed); + syslog(LOG_DEBUG, "%25s : %s", "openid.signed", o_signed); num_signed_values = num_tokens(o_signed, ','); for (i=0; iserver)); - curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0); - curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0); - curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf); curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback); curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost); - curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg); - curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1); -#ifdef CURLOPT_HTTP_CONTENT_DECODING - curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1); - curl_easy_setopt(curl, CURLOPT_ENCODING, ""); -#endif - curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL); - curl_easy_setopt(curl, CURLOPT_TIMEOUT, 180); /* die after 180 seconds */ - if ( - (!IsEmptyStr(config.c_ip_addr)) - && (strcmp(config.c_ip_addr, "*")) - && (strcmp(config.c_ip_addr, "::")) - && (strcmp(config.c_ip_addr, "0.0.0.0")) - ) { - curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr); - } res = curl_easy_perform(curl); if (res) { - CtdlLogPrintf(CTDL_DEBUG, "cmd_oidf() libcurl error %d: %s\n", res, errmsg); + syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg); } curl_easy_cleanup(curl); curl_formfree(formpost); @@ -857,7 +1008,7 @@ void cmd_oidf(char *argbuf) { } FreeStrBuf(&ReplyBuf); - CtdlLogPrintf(CTDL_DEBUG, "Authentication %s.\n", (oiddata->verified ? "succeeded" : "failed") ); + syslog(LOG_DEBUG, "Authentication %s.", (oiddata->verified ? "succeeded" : "failed") ); /* Respond to the client */ @@ -867,11 +1018,11 @@ void cmd_oidf(char *argbuf) { if (CC->logged_in) { if (attach_openid(&CC->user, oiddata->claimed_id) == 0) { cprintf("attach\n"); - CtdlLogPrintf(CTDL_DEBUG, "OpenID attach succeeded\n"); + syslog(LOG_DEBUG, "OpenID attach succeeded"); } else { cprintf("fail\n"); - CtdlLogPrintf(CTDL_DEBUG, "OpenID attach failed\n"); + syslog(LOG_DEBUG, "OpenID attach failed"); } } @@ -888,7 +1039,7 @@ void cmd_oidf(char *argbuf) { if (login_via_openid(oiddata->claimed_id) == 0) { cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password); logged_in_response(); - CtdlLogPrintf(CTDL_DEBUG, "Logged in using previously claimed OpenID\n"); + syslog(LOG_DEBUG, "Logged in using previously claimed OpenID"); } /* @@ -897,7 +1048,7 @@ void cmd_oidf(char *argbuf) { */ else if (config.c_disable_newu) { cprintf("fail\n"); - CtdlLogPrintf(CTDL_DEBUG, "Creating user failed due to local policy\n"); + syslog(LOG_DEBUG, "Creating user failed due to local policy"); } /* @@ -906,7 +1057,7 @@ void cmd_oidf(char *argbuf) { else if (openid_create_user_via_sreg(oiddata->claimed_id, keys) == 0) { cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password); logged_in_response(); - CtdlLogPrintf(CTDL_DEBUG, "Successfully auto-created new user\n"); + syslog(LOG_DEBUG, "Successfully auto-created new user"); } /* @@ -923,7 +1074,7 @@ void cmd_oidf(char *argbuf) { else { cprintf("\n"); } - CtdlLogPrintf(CTDL_DEBUG, "The desired Simple Registration name is already taken.\n"); + syslog(LOG_DEBUG, "The desired Simple Registration name is already taken."); } } } @@ -966,8 +1117,9 @@ CTDL_MODULE_INIT(openid_rp) } CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT); CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER); + openid_level_supported = 1; /* This module supports OpenID 1.0 only */ } - /* return our Subversion id for the Log */ - return "$Id$"; + /* return our module name for the log */ + return "openid_rp"; }