X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fmodules%2Fopenid%2Fserv_openid_rp.c;h=7feb11336c4e9c242a371d9dac0177dd316d8c70;hb=39deac2549defa7b5523c49abf91c38a39cfac40;hp=302df544402e39e278797dbbff9cd97867989863;hpb=3aec3a0316a3586e5b2f1d0bfd43141662402403;p=citadel.git diff --git a/citadel/modules/openid/serv_openid_rp.c b/citadel/modules/openid/serv_openid_rp.c index 302df5444..7feb11336 100644 --- a/citadel/modules/openid/serv_openid_rp.c +++ b/citadel/modules/openid/serv_openid_rp.c @@ -1,8 +1,20 @@ /* - * $Id$ + * 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 * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * 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, see . */ #include "sysdep.h" @@ -30,162 +42,781 @@ #include #include #include +#include #include "ctdl_module.h" +#include "config.h" +#include "citserver.h" +#include "user_ops.h" + +typedef struct _ctdl_openid { + StrBuf *claimed_id; + StrBuf *server; + int verified; + HashList *sreg_keys; +} ctdl_openid; + +void Free_ctdl_openid(ctdl_openid **FreeMe) +{ + if (*FreeMe == NULL) + return; + FreeStrBuf(&(*FreeMe)->claimed_id); + FreeStrBuf(&(*FreeMe)->server); + DeleteHash(&(*FreeMe)->sreg_keys); + free(*FreeMe); + *FreeMe = NULL; +} -struct ctdl_openid { - char claimed_id[1024]; - char server[1024]; -}; +/* + * This cleanup function blows away the temporary memory used by this module. + */ +void openid_cleanup_function(void) { + struct CitContext *CCC = CC; /* CachedCitContext - performance boost */ -/* - * Locate a tag and, given its 'rel=' parameter, return its 'href' parameter + if (CCC->openid_data != NULL) { + syslog(LOG_DEBUG, "Clearing OpenID session state"); + Free_ctdl_openid((ctdl_openid **) &CCC->openid_data); + } +} + + +/**************************************************************************/ +/* */ +/* Functions in this section handle Citadel internal OpenID mapping stuff */ +/* */ +/**************************************************************************/ + + +/* + * The structure of an openid record *key* is: + * + * |--------------claimed_id-------------| + * (actual length of claimed id) + * + * + * The structure of an openid record *value* is: + * + * |-----user_number----|------------claimed_id---------------| + * (sizeof long) (actual length of claimed id) + * */ -void extract_link(char *target_buf, int target_size, char *rel, char *source_buf) + + + +/* + * Attach an OpenID to a Citadel account + */ +int attach_openid(struct ctdluser *who, StrBuf *claimed_id) { - char *ptr = source_buf; + struct cdbdata *cdboi; + long fetched_usernum; + char *data; + int data_len; + char buf[2048]; - if (!target_buf) return; - if (!rel) return; - if (!source_buf) return; + if (!who) return(1); + if (StrLength(claimed_id)==0) return(1); - target_buf[0] = 0; + /* Check to see if this OpenID is already in the database */ - while (ptr = bmstrcasestr(ptr, "ptr, sizeof(long)); + cdb_free(cdboi); - char work_buffer[2048]; - char *link_tag_start = NULL; - char *link_tag_end = NULL; + if (fetched_usernum == who->usernum) { + syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id)); + return(0); + } + else { + syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id)); + return(3); + } + } - char rel_tag[2048]; - char href_tag[2048]; + /* Not already in the database, so attach it now */ - link_tag_start = ptr; - link_tag_end = strchr(ptr, '>'); - rel_tag[0] = 0; - href_tag[0] = 0; - - if ((link_tag_end) && (link_tag_end > link_tag_start)) { - int len; - len = link_tag_end - link_tag_start; - if (len > sizeof work_buffer) len = sizeof work_buffer; - memcpy(work_buffer, link_tag_start, len); - - char *rel_start = NULL; - char *rel_end = NULL; - rel_start = bmstrcasestr(work_buffer, "rel="); - if (rel_start) { - rel_start = strchr(rel_start, '\"'); - if (rel_start) { - ++rel_start; - rel_end = strchr(rel_start, '\"'); - if ((rel_end) && (rel_end > rel_start)) { - safestrncpy(rel_tag, rel_start, rel_end - rel_start + 1); - } - } - } + data_len = sizeof(long) + StrLength(claimed_id) + 1; + data = malloc(data_len); - char *href_start = NULL; - char *href_end = NULL; - href_start = bmstrcasestr(work_buffer, "href="); - if (href_start) { - href_start = strchr(href_start, '\"'); - if (href_start) { - ++href_start; - href_end = strchr(href_start, '\"'); - if ((href_end) && (href_end > href_start)) { - safestrncpy(href_tag, href_start, href_end - href_start + 1); - } - } + memcpy(data, &who->usernum, sizeof(long)); + memcpy(&data[sizeof(long)], ChrPtr(claimed_id), StrLength(claimed_id) + 1); + + cdb_store(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id), data, data_len); + free(data); + + 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"); + syslog(LOG_INFO, "%s", buf); + return(0); +} + + + +/* + * When a user is being deleted, we have to delete any OpenID associations + */ +void openid_purge(struct ctdluser *usbuf) { + struct cdbdata *cdboi; + HashList *keys = NULL; + HashPos *HashPos; + char *deleteme = NULL; + long len; + void *Value; + const char *Key; + long usernum = 0L; + + 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)) { + memcpy(&usernum, cdboi->ptr, sizeof(long)); + if (usernum == usbuf->usernum) { + deleteme = strdup(cdboi->ptr + sizeof(long)), + Put(keys, deleteme, strlen(deleteme), deleteme, NULL); } + } + cdb_free(cdboi); + } + + /* Go through the hash list, deleting keys we stored in it */ + + HashPos = GetNewHashPos(keys, 0); + while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0) + { + 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 */ + } + DeleteHashPos(&HashPos); + DeleteHash(&keys); +} - if (!strcasecmp(rel, rel_tag)) { - safestrncpy(target_buf, href_tag, target_size); - return; + +/* + * List the OpenIDs associated with the currently logged in account + */ +void cmd_oidl(char *argbuf) { + struct cdbdata *cdboi; + long usernum = 0L; + + if (CtdlAccessCheck(ac_logged_in)) return; + cdb_rewind(CDB_OPENID); + cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS); + + while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) { + if (cdboi->len > sizeof(long)) { + memcpy(&usernum, cdboi->ptr, sizeof(long)); + if (usernum == CC->user.usernum) { + cprintf("%s\n", cdboi->ptr + sizeof(long)); } + } + cdb_free(cdboi); + } + cprintf("000\n"); +} + +/* + * List ALL OpenIDs in the database + */ +void cmd_oida(char *argbuf) { + struct cdbdata *cdboi; + long usernum; + struct ctdluser usbuf; + + if (CtdlAccessCheck(ac_aide)) return; + cdb_rewind(CDB_OPENID); + cprintf("%d List of all OpenIDs in the database:\n", LISTING_FOLLOWS); + + while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) { + if (cdboi->len > sizeof(long)) { + memcpy(&usernum, cdboi->ptr, sizeof(long)); + if (CtdlGetUserByNumber(&usbuf, usernum) != 0) { + usbuf.fullname[0] = 0; + } + cprintf("%s|%ld|%s\n", + cdboi->ptr + sizeof(long), + usernum, + usbuf.fullname + ); } + cdb_free(cdboi); + } + cprintf("000\n"); +} + + +/* + * Attempt to register (populate the vCard) the currently-logged-in user + * using the data from Simple Registration Extension, if present. + */ +void populate_vcard_from_sreg(HashList *sreg_keys) { - ++ptr; + struct vCard *v; + int pop = 0; /* number of fields populated */ + char *data = NULL; + char *postcode = NULL; + char *country = NULL; + + if (!sreg_keys) return; + v = vcard_new(); + if (!v) return; + + if (GetHash(sreg_keys, "identity", 8, (void *) &data)) { + vcard_add_prop(v, "url;type=openid", data); + ++pop; } + if (GetHash(sreg_keys, "sreg.email", 10, (void *) &data)) { + vcard_add_prop(v, "email;internet", data); + ++pop; + } + + if (GetHash(sreg_keys, "sreg.nickname", 13, (void *) &data)) { + vcard_add_prop(v, "nickname", data); + ++pop; + } + if (GetHash(sreg_keys, "sreg.fullname", 13, (void *) &data)) { + char n[256]; + vcard_add_prop(v, "fn", data); + vcard_fn_to_n(n, data, sizeof n); + vcard_add_prop(v, "n", n); + ++pop; + } + + if (!GetHash(sreg_keys, "sreg.postcode", 13, (void *) &postcode)) { + postcode = NULL; + } + + if (!GetHash(sreg_keys, "sreg.country", 12, (void *) &country)) { + country = NULL; + } + + if (postcode || country) { + char adr[256]; + snprintf(adr, sizeof adr, ";;;;;%s;%s", + (postcode ? postcode : ""), + (country ? country : "") + ); + vcard_add_prop(v, "adr", adr); + ++pop; + } + + if (GetHash(sreg_keys, "sreg.dob", 8, (void *) &data)) { + vcard_add_prop(v, "bday", data); + ++pop; + } + + if (GetHash(sreg_keys, "sreg.gender", 11, (void *) &data)) { + vcard_add_prop(v, "x-funambol-gender", data); + ++pop; + } + + /* Only save the vCard if there is some useful data in it */ + if (pop > 0) { + char *ser; + ser = vcard_serialize(v); + if (ser) { + CtdlWriteObject(USERCONFIGROOM, "text/x-vcard", + ser, strlen(ser)+1, &CC->user, 0, 0, 0 + ); + free(ser); + } + } + vcard_free(v); } +/* + * Create a new user account, manually specifying the name, after successfully + * verifying an OpenID (which will of course be attached to the account) + */ +void cmd_oidc(char *argbuf) { + ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data; -struct fh_data { - char *buf; - int total_bytes_received; - int maxbytes; -}; + if (!oiddata) { + cprintf("%d You have not verified an OpenID yet.\n", ERROR); + return; + } + + if (!oiddata->verified) { + cprintf("%d You have not verified an OpenID yet.\n", ERROR); + return; + } + /* We can make the semantics of OIDC exactly the same as NEWU, simply + * by _calling_ cmd_newu() and letting it run. Very clever! + */ + cmd_newu(argbuf); -size_t fh_callback(void *ptr, size_t size, size_t nmemb, void *stream) -{ - struct fh_data *fh = (struct fh_data *) stream; - int got_bytes = (size * nmemb); + /* Now, if this logged us in, we have to attach the OpenID */ + if (CC->logged_in) { + attach_openid(&CC->user, oiddata->claimed_id); + if (oiddata->sreg_keys != NULL) { + populate_vcard_from_sreg(oiddata->sreg_keys); + } + } + +} + + +/* + * Detach an OpenID from the currently logged in account + */ +void cmd_oidd(char *argbuf) { + struct cdbdata *cdboi; + char id_to_detach[1024]; + int this_is_mine = 0; + long usernum = 0L; + + if (CtdlAccessCheck(ac_logged_in)) return; + extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach); + if (IsEmptyStr(id_to_detach)) { + cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE); + } - if (fh->total_bytes_received + got_bytes > fh->maxbytes) { - got_bytes = fh->maxbytes - fh->total_bytes_received; + cdb_rewind(CDB_OPENID); + while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) { + if (cdboi->len > sizeof(long)) { + memcpy(&usernum, cdboi->ptr, sizeof(long)); + if (usernum == CC->user.usernum) { + this_is_mine = 1; + } + } + cdb_free(cdboi); } - if (got_bytes > 0) { - memcpy(&fh->buf[fh->total_bytes_received], ptr, got_bytes); - fh->total_bytes_received += got_bytes; + + if (!this_is_mine) { + cprintf("%d That OpenID was not found or not associated with your account.\n", + ERROR + ILLEGAL_VALUE); + return; } - return (size * nmemb); /* always succeed; libcurl doesn't need to know if we truncated it */ + cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach)); + cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach); } /* - * 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. + * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension */ -int fetch_http(char *url, char *target_buf, int maxbytes, int normalize_len) +int openid_create_user_via_sreg(StrBuf *claimed_id, HashList *sreg_keys) { - CURL *curl; - CURLcode res; - char errmsg[1024] = ""; - struct fh_data fh = { - target_buf, - 0, - maxbytes - }; - char *effective_url = NULL; + char *desired_name = NULL; + char new_password[32]; + long len; + + if (config.c_auth_mode != AUTHMODE_NATIVE) return(1); + if (config.c_disable_newu) return(2); + if (CC->logged_in) return(3); + if (!GetHash(sreg_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4); + + syslog(LOG_DEBUG, "The desired account name is <%s>", desired_name); + + len = cutuserkey(desired_name); + if (!CtdlGetUser(&CC->user, desired_name)) { + syslog(LOG_DEBUG, "<%s> is already taken by another user.", desired_name); + memset(&CC->user, 0, sizeof(struct ctdluser)); + return(5); + } + + /* The desired account name is available. Create the account and log it in! */ + if (create_user(desired_name, len, 1)) return(6); + + snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random()); + CtdlSetPassword(new_password); + attach_openid(&CC->user, claimed_id); + populate_vcard_from_sreg(sreg_keys); + return(0); +} + + +/* + * If a user account exists which is associated with the Claimed ID, log it in and return zero. + * Otherwise it returns nonzero. + */ +int login_via_openid(StrBuf *claimed_id) +{ + struct cdbdata *cdboi; + long usernum = 0; + + cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id)); + if (cdboi == NULL) { + return(-1); + } + + memcpy(&usernum, cdboi->ptr, sizeof(long)); + cdb_free(cdboi); + + if (!CtdlGetUserByNumber(&CC->user, usernum)) { + /* Now become the user we just created */ + safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user); + do_login(); + return(0); + } + else { + memset(&CC->user, 0, sizeof(struct ctdluser)); + return(-1); + } +} + + + + +/**************************************************************************/ +/* */ +/* Functions in this section handle OpenID protocol */ +/* */ +/**************************************************************************/ + + +/* + * Locate a tag and, given its 'rel=' parameter, return its 'href' parameter + */ +void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf) +{ + int i; + const char *ptr; + const char *href_start = NULL; + const char *href_end = NULL; + const char *link_tag_start = NULL; + const char *link_tag_end = NULL; + const char *rel_start = NULL; + const char *rel_end = NULL; + + if (!target_buf) return; + if (!rel) return; + if (!source_buf) return; + + ptr = ChrPtr(source_buf); + + FlushStrBuf(target_buf); + while (ptr = cbmstrcasestr(ptr, "'); + if (link_tag_end == NULL) + break; + for (i=0; i < 1; i++ ){ + rel_start = cbmstrcasestr(link_tag_start, "rel="); + if ((rel_start == NULL) || + (rel_start > link_tag_end)) + continue; + + rel_start = strchr(rel_start, '\"'); + if ((rel_start == NULL) || + (rel_start > link_tag_end)) + continue; + ++rel_start; + rel_end = strchr(rel_start, '\"'); + if ((rel_end == NULL) || + (rel_end == rel_start) || + (rel_end >= link_tag_end) ) + continue; + if (strncasecmp(rel, rel_start, repllen)!= 0) + continue; /* didn't match? never mind... */ + + href_start = cbmstrcasestr(link_tag_start, "href="); + if ((href_start == NULL) || + (href_start >= link_tag_end)) + continue; + href_start = strchr(href_start, '\"'); + if ((href_start == NULL) | + (href_start >= link_tag_end)) + continue; + ++href_start; + href_end = strchr(href_start, '\"'); + if ((href_end == NULL) || + (href_end == href_start) || + (href_start >= link_tag_end)) + continue; + StrBufPlain(target_buf, href_start, href_end - href_start); + } + ptr = link_tag_end; + } +} - if (!url) return(-1); - if (!target_buf) return(-1); - memset(target_buf, 0, maxbytes); + +/* + * Wrapper for curl_easy_init() that includes the options common to all calls + * used in this module. + */ +CURL *ctdl_openid_curl_easy_init(char *errmsg) { + CURL *curl; curl = curl_easy_init(); if (!curl) { - CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n"); - return(-1); + return(curl); } - curl_easy_setopt(curl, CURLOPT_URL, url); curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0); curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0); - curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh); - curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_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); + curl_easy_setopt(curl, CURLOPT_ENCODING, ""); +#endif curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL); - // FIXME set the CURLOPT_INTERFACE - res = curl_easy_perform(curl); - if (res) { - CtdlLogPrintf(CTDL_DEBUG, "fetch_http() libcurl error %d: %s\n", res, errmsg); + curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30); /* die after 30 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); + } + + 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); + + curl_easy_cleanup(curl); + return StrLength(ReplyBuf); +} + + + +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; + + if (xrds) ; /* this is only here to silence the warning for now */ + + /* 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; + + syslog(LOG_DEBUG, "\033[32m --- XRDS DOCUMENT --- \n%s\033[0m", ChrPtr(ReplyBuf)); + + 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); /* FIXME return nonzero if something wonderful happened */ +} + + + +/* + * Callback function for perform_openid2_discovery() + * We're interested in the X-XRDS-Location: header. + */ +size_t yadis_headerfunction(void *ptr, size_t size, size_t nmemb, void *userdata) { + char hdr[1024]; + StrBuf **x_xrds_location = (StrBuf **) userdata; + + memcpy(hdr, ptr, (size*nmemb)); + hdr[size*nmemb] = 0; + + if (!strncasecmp(hdr, "X-XRDS-Location:", 16)) { + *x_xrds_location = NewStrBufPlain(&hdr[16], ((size*nmemb)-16)); + StrBufTrim(*x_xrds_location); } - if (normalize_len > 0) { - curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url); - safestrncpy(url, effective_url, normalize_len); + + return(size * nmemb); +} + + + +/* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5. + * + * If Yadis fails, we then attempt HTML discovery using the same document. + * + * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data. + * If fails, returns 0 and does nothing else. + */ +int perform_openid2_discovery(StrBuf *YadisURL) { + int docbytes = (-1); + StrBuf *ReplyBuf = NULL; + int return_value = 0; + CURL *curl; + CURLcode result; + char errmsg[1024] = ""; + struct curl_slist *my_headers = NULL; + StrBuf *x_xrds_location = NULL; + ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data; + + if (YadisURL == NULL) return(0); + syslog(LOG_DEBUG, "perform_openid2_discovery(%s)", ChrPtr(YadisURL)); + 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); + + my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */ + my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml"); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers); + + curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &x_xrds_location); + curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, yadis_headerfunction); + + result = curl_easy_perform(curl); + if (result) { + syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg); } + curl_slist_free_all(my_headers); curl_easy_cleanup(curl); - return fh.total_bytes_received; + docbytes = StrLength(ReplyBuf); + + /* + * The response from the server will be one of: + * + * Option 1: An HTML document with a element that includes a 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"); + extract_link(oiddata->server, HKEY("openid2.provider"), ReplyBuf); + if (StrLength(oiddata->server) > 0) { + syslog(LOG_DEBUG, "\033[31mHTML DISCO PROVIDER: %s\033[0m", ChrPtr(oiddata->server)); + } + } + + if (ReplyBuf != NULL) { + FreeStrBuf(&ReplyBuf); + } + return(return_value); } @@ -193,125 +824,162 @@ int fetch_http(char *url, char *target_buf, int maxbytes, int normalize_len) * Setup an OpenID authentication */ void cmd_oids(char *argbuf) { - char return_to[1024]; - char trust_root[1024]; - int i; - char buf[SIZ]; + 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; struct CitContext *CCC = CC; /* CachedCitContext - performance boost */ - struct ctdl_openid *oiddata; + ctdl_openid *oiddata; - if (CCC->logged_in) { - cprintf("%d Already logged in.\n", ERROR + ALREADY_LOGGED_IN); - return; - } + Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data); - if (CCC->openid_data != NULL) { - free(CCC->openid_data); - } - oiddata = malloc(sizeof(struct ctdl_openid)); + CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid)); if (oiddata == NULL) { cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR); return; } - memset(oiddata, 0, sizeof(struct ctdl_openid)); + memset(oiddata, 0, sizeof(ctdl_openid)); CCC->openid_data = (void *) oiddata; - extract_token(oiddata->claimed_id, argbuf, 0, '|', sizeof oiddata->claimed_id); - extract_token(return_to, argbuf, 1, '|', sizeof return_to); - extract_token(trust_root, argbuf, 2, '|', sizeof trust_root); + 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)); + + +#if 0 + /********** 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); + */ + int yadis_succeeded = perform_openid2_discovery(oiddata->claimed_id); +#endif + + - i = fetch_http(oiddata->claimed_id, buf, sizeof buf - 1, sizeof oiddata->claimed_id); - CtdlLogPrintf(CTDL_DEBUG, "Normalized URL and Claimed ID is: %s\n", oiddata->claimed_id); - buf[sizeof buf - 1] = 0; - if (i > 0) { - char openid_delegate[1024]; + /************ OPENID 1.1 **********/ - extract_link(oiddata->server, sizeof oiddata->server, "openid.server", buf); - extract_link(openid_delegate, sizeof openid_delegate, "openid.delegate", buf); + if ( (fetch_http(oiddata->claimed_id, &ReplyBuf) > 0) + && (StrLength(ReplyBuf) > 0) + ) { + openid_delegate = NewStrBuf(); + oiddata->server = NewStrBuf(); + extract_link(oiddata->server, HKEY("openid.server"), ReplyBuf); + extract_link(openid_delegate, HKEY("openid.delegate"), ReplyBuf); - if (IsEmptyStr(oiddata->server)) { + if (StrLength(oiddata->server) == 0) { cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR); + FreeStrBuf(&ArgBuf); + FreeStrBuf(&ReplyBuf); + FreeStrBuf(&return_to); + FreeStrBuf(&trust_root); + FreeStrBuf(&openid_delegate); + FreeStrBuf(&RedirectUrl); return; } /* Empty delegate is legal; we just use the openid_url instead */ - if (IsEmptyStr(openid_delegate)) { - safestrncpy(openid_delegate, oiddata->claimed_id, sizeof openid_delegate); + if (StrLength(openid_delegate) == 0) { + StrBufPlain(openid_delegate, SKEY(oiddata->claimed_id)); } /* Assemble a URL to which the user-agent will be redirected. */ - char redirect_string[4096]; - char escaped_identity[512]; - char escaped_return_to[2048]; - char escaped_trust_root[1024]; - char escaped_sreg_optional[256]; - - urlesc(escaped_identity, sizeof escaped_identity, openid_delegate); - urlesc(escaped_return_to, sizeof escaped_return_to, return_to); - urlesc(escaped_trust_root, sizeof escaped_trust_root, trust_root); - urlesc(escaped_sreg_optional, sizeof escaped_sreg_optional, - "nickname,email,fullname,postcode,country"); - - snprintf(redirect_string, sizeof redirect_string, - "%s" - "?openid.mode=checkid_setup" - "&openid.identity=%s" - "&openid.return_to=%s" - "&openid.trust_root=%s" - "&openid.sreg.optional=%s" - , - oiddata->server, - escaped_identity, - escaped_return_to, - escaped_trust_root, - escaped_sreg_optional - ); - cprintf("%d %s\n", CIT_OK, redirect_string); + + RedirectUrl = NewStrBufDup(oiddata->server); + + 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); + return; } + FreeStrBuf(&ArgBuf); + FreeStrBuf(&ReplyBuf); + FreeStrBuf(&return_to); + FreeStrBuf(&trust_root); + FreeStrBuf(&openid_delegate); + FreeStrBuf(&RedirectUrl); + cprintf("%d Unable to fetch OpenID URL\n", ERROR); } -/* - * Callback function to free a pointer (used below in the hash list) - */ -void free_oid_key(void *ptr) { - free(ptr); -} /* * Finalize an OpenID authentication */ void cmd_oidf(char *argbuf) { + long len; char buf[2048]; char thiskey[1024]; char thisdata[1024]; HashList *keys = NULL; - HashPos *HashPos; - struct ctdl_openid *oiddata = (struct ctdl_openid *) CC->openid_data; + ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data; + if (oiddata == NULL) { + cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR); + return; + } + if (StrLength(oiddata->server) == 0){ + cprintf("%d need a remote server to authenticate against\n", ERROR + ILLEGAL_VALUE); + return; + } keys = NewHash(1, NULL); if (!keys) { cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR); return; } - cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE); while (client_getln(buf, sizeof buf), strcmp(buf, "000")) { - extract_token(thiskey, buf, 0, '|', sizeof thiskey); + len = extract_token(thiskey, buf, 0, '|', sizeof thiskey); + 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); - Put(keys, thiskey, strlen(thiskey), strdup(thisdata), free_oid_key); + 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; @@ -326,17 +994,20 @@ void cmd_oidf(char *argbuf) { char k_keyname[128]; char k_o_keyname[128]; char *k_value = NULL; + StrBuf *ReplyBuf; curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, "openid.mode", CURLFORM_COPYCONTENTS, "check_authentication", CURLFORM_END); + 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); + syslog(LOG_DEBUG, "%25s : %s", "openid.assoc_handle", o_assoc_handle); } if (GetHash(keys, "sig", 3, (void *) &o_sig)) { @@ -344,6 +1015,7 @@ void cmd_oidf(char *argbuf) { CURLFORM_COPYNAME, "openid.sig", CURLFORM_COPYCONTENTS, o_sig, CURLFORM_END); + syslog(LOG_DEBUG, "%25s : %s", "openid.sig", o_sig); } if (GetHash(keys, "signed", 6, (void *) &o_signed)) { @@ -351,94 +1023,160 @@ void cmd_oidf(char *argbuf) { CURLFORM_COPYNAME, "openid.signed", CURLFORM_COPYCONTENTS, o_signed, CURLFORM_END); + 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, &fh); - // curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback); + curl = ctdl_openid_curl_easy_init(errmsg); + curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->server)); + 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_POST, 1); - curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg); - curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1); - curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL); - // FIXME set the CURLOPT_INTERFACE + 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); - /* FIXME do something with the results */ + if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true")) { + oiddata->verified = 1; + } + FreeStrBuf(&ReplyBuf); + + syslog(LOG_DEBUG, "Authentication %s.", (oiddata->verified ? "succeeded" : "failed") ); /* Respond to the client */ - cprintf("message|FIXME finish this\n"); - cprintf("000\n"); - /* Free the hash list */ - long len; - void *Value; - char *Key; + if (oiddata->verified) { - HashPos = GetNewHashPos(); - while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0) - { - free(Value); - } - DeleteHashPos(&HashPos); -} + /* If we were already logged in, attach the OpenID to the user's account */ + if (CC->logged_in) { + if (attach_openid(&CC->user, oiddata->claimed_id) == 0) { + cprintf("attach\n"); + syslog(LOG_DEBUG, "OpenID attach succeeded"); + } + else { + cprintf("fail\n"); + syslog(LOG_DEBUG, "OpenID attach failed"); + } + } + /* Otherwise, a user is attempting to log in using the verified OpenID */ + else { + /* + * Existing user who has claimed this OpenID? + * + * Note: if you think that sending the password back over the wire is insecure, + * check your assumptions. If someone has successfully asserted an OpenID that + * is associated with the account, they already have password equivalency and can + * login, so they could just as easily change the password, etc. + */ + if (login_via_openid(oiddata->claimed_id) == 0) { + cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password); + logged_in_response(); + syslog(LOG_DEBUG, "Logged in using previously claimed OpenID"); + } -// mode = [6] id_res -// identity = [50] http://uncensored.citadel.org/~ajc/MyID.config.php -// assoc_handle = [26] 6ekac3ju181tgepk7v4h9r7ui7 -// return_to = [42] http://jemcaterers.net/finish_openid_login -// sreg.nickname = [17] IGnatius T Foobar -// sreg.email = [26] ajc@uncensored.citadel.org -// sreg.fullname = [10] Art Cancro -// sreg.postcode = [5] 10549 -// sreg.country = [2] US -// signed = [102] mode,identity,assoc_handle,return_to,sreg.nickname,sreg.email,sreg.fullname,sreg.postcode,sreg.country -// sig = [28] vixxxU4MAqWfxxxxCfrHv3TxxxhEw= + /* + * If this system does not allow self-service new user registration, the + * remaining modes do not apply, so fail here and now. + */ + else if (config.c_disable_newu) { + cprintf("fail\n"); + syslog(LOG_DEBUG, "Creating user failed due to local policy"); + } + /* + * New user whose OpenID is verified and Simple Registration Extension is in use? + */ + 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(); + syslog(LOG_DEBUG, "Successfully auto-created new user"); + } -/* - * This cleanup function blows away the temporary memory used by this module. - */ -void openid_cleanup_function(void) { + /* + * OpenID is verified, but the desired username either was not specified or + * conflicts with an existing user. Manual account creation is required. + */ + else { + char *desired_name = NULL; + cprintf("verify_only\n"); + cprintf("%s\n", ChrPtr(oiddata->claimed_id)); + if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) { + cprintf("%s\n", desired_name); + } + else { + cprintf("\n"); + } + syslog(LOG_DEBUG, "The desired Simple Registration name is already taken."); + } + } + } + else { + cprintf("fail\n"); + } + cprintf("000\n"); - if (CC->openid_data != NULL) { - free(CC->openid_data); + if (oiddata->sreg_keys != NULL) { + DeleteHash(&oiddata->sreg_keys); + oiddata->sreg_keys = NULL; } + oiddata->sreg_keys = keys; } +/**************************************************************************/ +/* */ +/* Functions in this section handle module initialization and shutdown */ +/* */ +/**************************************************************************/ + + + + CTDL_MODULE_INIT(openid_rp) { - if (!threading) - { + if (!threading) { curl_global_init(CURL_GLOBAL_ALL); - CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication"); - CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication"); - CtdlRegisterSessionHook(openid_cleanup_function, EVT_STOP); + + /* Only enable the OpenID command set when native mode authentication is in use. */ + if (config.c_auth_mode == AUTHMODE_NATIVE) { + CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication"); + CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication"); + CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account"); + CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account"); + CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID"); + CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database"); + } + 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"; }