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Diffstat (limited to 'lib') (more/less context) (ignore whitespace changes)
-rw-r--r--lib/Makefile.am3
-rw-r--r--lib/openid_service_resolver.cc294
-rw-r--r--lib/util.cc16
3 files changed, 308 insertions, 5 deletions
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 7309353..b278faf 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -24,6 +24,7 @@ libopkele_la_SOURCES = \
extension.cc \
sreg.cc \
extension_chain.cc \
- curl.cc expat.cc
+ curl.cc expat.cc \
+ openid_service_resolver.cc
libopkele_la_LDFLAGS = \
-version-info 2:0:0
diff --git a/lib/openid_service_resolver.cc b/lib/openid_service_resolver.cc
new file mode 100644
index 0000000..5f82955
--- a/dev/null
+++ b/lib/openid_service_resolver.cc
@@ -0,0 +1,294 @@
+#include <cctype>
+#include <opkele/exception.h>
+#include <opkele/util.h>
+#include <opkele/openid_service_resolver.h>
+#include <opkele/uris.h>
+
+#define LOCATION_HEADER "X-XRDS-Location"
+
+namespace opkele {
+ static const char *whitespace = " \t\r\n";
+
+ openid_service_resolver_t::openid_service_resolver_t(const string& xp)
+ : util::curl_t(easy_init()),
+ util::expat_t(0),
+ xri_proxy(xp.empty()?"http://beta.xri.net/":xp)
+ {
+ CURLcode r;
+ (r=misc_sets())
+ || (r=set_write())
+ || (r==set_header())
+ ;
+ if(r)
+ throw opkele::exception_curl(OPKELE_CP_ "failed to set curly options",r);
+ }
+
+ static bool is_element(const XML_Char *n,const char *en) {
+ if(!strcasecmp(n,en)) return true;
+ int nl = strlen(n), enl = strlen(en);
+ if( (nl>=(enl+1)) && n[nl-enl-1]=='\t'
+ && !strcasecmp(&n[nl-enl],en) )
+ return true;
+ return false;
+ }
+ static inline bool is_qelement(const XML_Char *n,const char *qen) {
+ return !strcasecmp(n,qen);
+ }
+ static inline bool is_element(
+ const openid_service_resolver_t::parser_node_t& n,
+ const char *en) {
+ return is_element(n.element.c_str(),en);
+ }
+ static inline bool is_qelement(
+ const openid_service_resolver_t::parser_node_t& n,
+ const char *qen) {
+ return is_qelement(n.element.c_str(),qen);
+ }
+
+ void openid_service_resolver_t::start_element(const XML_Char *n,const XML_Char **a) {
+ if(state!=state_parse) return;
+ tree.push(n,a);
+ parser_node_t& t = tree.top();
+ if(is_element(n,"html") || is_element(n,"head")
+ || is_qelement(n,NSURI_XRDS "\tXRDS")
+ || is_qelement(n,NSURI_XRD "\tXRD") )
+ t.skip_tags = false;
+ else if(is_qelement(n,NSURI_XRD "\tService")
+ || is_qelement(n,NSURI_XRD "\tType")
+ || is_qelement(n,NSURI_XRD "\tURI")
+ || is_qelement(n,NSURI_OPENID10 "\tDelegate")
+ || is_qelement(n,NSURI_XRD "\tCanonicalID") )
+ t.skip_tags = t.skip_text = false;
+ else if(is_element(n,"body"))
+ state = state_stopping_body;
+ }
+ void openid_service_resolver_t::end_element(const XML_Char *n) {
+ if(state!=state_parse) return;
+ assert(tree.top().element == n);
+ pop_tag();
+ }
+ void openid_service_resolver_t::character_data(const XML_Char *s,int l) {
+ if(state!=state_parse) return;
+ if( !( tree.empty() || tree.top().skip_text ) )
+ tree.top().content.append(s,l);
+ }
+
+ static void copy_trim_whitespace(string& to,const string& from) {
+ string::size_type ns0 = from.find_first_not_of(whitespace);
+ if(ns0==string::npos) {
+ to.clear(); return;
+ }
+ string::size_type ns1 = from.find_last_not_of(whitespace);
+ assert(ns1!=string::npos);
+ to.assign(from,ns0,ns1-ns0+1);
+ }
+
+ void openid_service_resolver_t::pop_tag() {
+ assert(!tree.empty());
+ parser_node_t& t = tree.top();
+ if( is_element(t,"meta")
+ && !strcasecmp(t.attrs["http-equiv"].c_str(),LOCATION_HEADER) ) {
+ xrds_location = t.attrs["content"];
+ }else if( is_element(t,"link") ) {
+ parser_node_t::attrs_t::const_iterator ir = t.attrs.find("rel");
+ if(ir!=t.attrs.end()) {
+ const string& rels = ir->second;
+ for(string::size_type ns = rels.find_first_not_of(whitespace);
+ ns!=string::npos;
+ ns=rels.find_first_not_of(whitespace,ns)) {
+ string::size_type s = rels.find_first_of(whitespace,ns);
+ string rel;
+ if(s==string::npos) {
+ rel.assign(rels,ns,string::npos);
+ ns = string::npos;
+ }else{
+ rel.assign(rels,ns,s-ns);
+ ns = s;
+ }
+ if(rel=="openid.server")
+ copy_trim_whitespace(html_SEP.xrd_URI,t.attrs["href"]);
+ else if(rel=="openid.delegate")
+ copy_trim_whitespace(html_SEP.openid_Delegate,t.attrs["href"]);
+ }
+ }
+ }else if( is_element(t,"head") )
+ state = state_stopping_head;
+ else if( is_qelement(t,NSURI_XRD "\tXRD")) {
+ if( !(
+ (
+ xri_mode
+ && t.auth_info.canonical_id.empty()
+ ) ||
+ t.auth_info.auth_SEP.xrd_Type.empty()
+ ) )
+ auth_info = t.auth_info;
+ }else if( tree.size()>1 ) {
+ parser_node_t& p = tree.parent();
+ if( is_qelement(p,NSURI_XRD "\tService") ) {
+ if( is_qelement(t,NSURI_XRD "\tType") ) {
+ if(t.content==STURI_OPENID10) {
+ string tmp; copy_trim_whitespace(tmp,t.content);
+ p.auth_info.auth_SEP.xrd_Type.insert(tmp);
+ }
+ }else if( is_qelement(t,NSURI_XRD "\tURI") )
+ copy_trim_whitespace(p.auth_info.auth_SEP.xrd_URI,t.content);
+ else if( is_qelement(t,NSURI_OPENID10 "\tDelegate") )
+ copy_trim_whitespace(p.auth_info.auth_SEP.openid_Delegate,t.content);
+ }else if( is_qelement(p,NSURI_XRD "\tXRD") ) {
+ if(is_qelement(t,NSURI_XRD "\tService") ) {
+ if( !t.auth_info.auth_SEP.xrd_Type.empty() ) {
+ parser_node_t::attrs_t::const_iterator ip
+ = t.attrs.find("priority");
+ if(ip!=t.attrs.end()) {
+ const char *nptr = ip->second.c_str();
+ char *eptr = 0;
+ t.auth_info.auth_SEP.priority = strtol(nptr,&eptr,10);
+ if(nptr==eptr)
+ t.auth_info.auth_SEP.priority = LONG_MAX;
+ }
+ if( (t.auth_info.auth_SEP.priority < p.auth_info.auth_SEP.priority)
+ || p.auth_info.auth_SEP.xrd_Type.empty() )
+ p.auth_info.auth_SEP = t.auth_info.auth_SEP;
+ }
+ }else if( is_qelement(t,NSURI_XRD "\tCanonicalID") )
+ copy_trim_whitespace(p.auth_info.canonical_id,t.content);
+ }
+ }
+
+ tree.pop();
+ }
+
+ size_t openid_service_resolver_t::write(void *p,size_t s,size_t nm) {
+ if(state != state_parse)
+ return 0;
+ /* TODO: limit total size */
+ size_t bytes = s*nm;
+ parse((const char *)p,bytes,false);
+ return bytes;
+ }
+
+ size_t openid_service_resolver_t::header(void *p,size_t s,size_t nm) {
+ size_t bytes = s*nm;
+ const char *h = (const char *)p;
+ const char *colon = (const char*)memchr(p,':',bytes);
+ const char *space = (const char*)memchr(p,' ',bytes);
+ if(space && ( (!colon) || space<colon ) ) {
+ xrds_location.clear(); http_content_type.clear();
+ }else if(colon) {
+ const char *hv = ++colon;
+ int hnl = colon-h;
+ int rb;
+ for(rb = bytes-hnl-1;
+ rb>0 && isspace(*hv);
+ ++hv,--rb );
+ while(rb>0 && isspace(hv[rb-1]))
+ --rb;
+ if(rb) {
+ if( (hnl >= sizeof(LOCATION_HEADER))
+ && !strncasecmp(h,LOCATION_HEADER ":",
+ sizeof(LOCATION_HEADER)) ) {
+ xrds_location.assign(hv,rb);
+ }else if( (hnl >= sizeof("Content-Type"))
+ && !strncasecmp(h,"Content-Type:",
+ sizeof("Content-Type")) ) {
+ const char *sc = (const char*)memchr(
+ hv,';',rb);
+ http_content_type.assign(
+ hv,sc?(sc-hv):rb );
+ }
+ }
+ }
+ return curl_t::header(p,s,nm);
+ }
+
+ void openid_service_resolver_t::discover_service(const string& url,bool xri) {
+ CURLcode r = easy_setopt(CURLOPT_URL,url.c_str());
+ if(r)
+ throw opkele::exception_curl(OPKELE_CP_ "failed to set curly urlie",r);
+
+ (*(expat_t*)this) = parser_create_ns();
+ set_user_data(); set_element_handler();
+ set_character_data_handler();
+ tree.clear();
+ state = state_parse;
+
+ r = easy_perform();
+ if(r && r!=CURLE_WRITE_ERROR)
+ throw exception_curl(OPKELE_CP_ "failed to perform curly request",r);
+
+ parse(0,0,true);
+ while(!tree.empty()) pop_tag();
+ }
+
+ const openid_auth_info_t& openid_service_resolver_t::resolve(const string& id) {
+ auth_info = openid_auth_info_t();
+ html_SEP = openid_auth_SEP_t();
+
+ string::size_type fns = id.find_first_not_of(whitespace);
+ if(fns==string::npos)
+ throw opkele::bad_input(OPKELE_CP_ "whitespace-only identity");
+ string::size_type lns = id.find_last_not_of(whitespace);
+ assert(lns!=string::npos);
+ if(!strncasecmp(
+ id.c_str()+fns,"xri://",
+ sizeof("xri://")-1))
+ fns+=sizeof("xri://")-1;
+ string nid(id,fns,lns-fns+1);
+ if(nid.empty())
+ throw opkele::bad_input(OPKELE_CP_ "nothing significant in identity");
+ if(strchr("=@+$!(",*nid.c_str())) {
+ discover_service(
+ xri_proxy + util::url_encode(nid) +
+ "?_xrd_t=" STURI_OPENID10 "&_xrd_r=application/xrd+xml;sep=true",
+ true );
+ if(auth_info.canonical_id.empty()
+ || auth_info.auth_SEP.xrd_Type.empty() )
+ throw opkele::failed_lookup(OPKELE_CP_ "no OpenID service for XRI found");
+ return auth_info;
+ }else{
+ const char *np = nid.c_str();
+ if( (strncasecmp(np,"http",4) || strncmp(
+ tolower(*(np+4))=='s'? np+5 : np+4, "://", 3))
+#ifndef NDEBUG
+ && strncasecmp(np,"file:///",sizeof("file:///")-1)
+#endif /* XXX: or how do I let tests work? */
+ )
+ nid.insert(0,"http://");
+ string::size_type fp = nid.find('#');
+ if(fp!=string::npos) {
+ string::size_type qp = nid.find('?');
+ if(qp==string::npos || qp<fp) {
+ nid.erase(fp);
+ }else if(qp>fp)
+ nid.erase(fp,qp-fp);
+ }
+ discover_service(nid);
+ const char *eu = 0;
+ CURLcode r = easy_getinfo(CURLINFO_EFFECTIVE_URL,&eu);
+ if(r)
+ throw exception_curl(OPKELE_CP_ "failed to get CURLINFO_EFFECTIVE_URL",r);
+ string canonicalized_id = util::rfc_3986_normalize_uri(eu);
+ if(xrds_location.empty()) {
+ if(auth_info.auth_SEP.xrd_Type.empty()) {
+ if(html_SEP.xrd_URI.empty())
+ throw opkele::failed_lookup(OPKELE_CP_ "no OpenID service discovered");
+ auth_info.auth_SEP = html_SEP;
+ auth_info.auth_SEP.xrd_Type.clear(); auth_info.auth_SEP.xrd_Type.insert( STURI_OPENID10 );
+ auth_info.canonical_id = canonicalized_id;
+ }else{
+ if(auth_info.canonical_id.empty())
+ auth_info.canonical_id = canonicalized_id;
+ }
+ return auth_info;
+ }else{
+ discover_service(xrds_location);
+ if(auth_info.auth_SEP.xrd_Type.empty())
+ throw opkele::failed_lookup(OPKELE_CP_ "no OpenID service found in Yadis document");
+ if(auth_info.canonical_id.empty())
+ auth_info.canonical_id = canonicalized_id;
+ return auth_info;
+ }
+ }
+ }
+
+}
diff --git a/lib/util.cc b/lib/util.cc
index ac70938..69d37b5 100644
--- a/lib/util.cc
+++ b/lib/util.cc
@@ -173,21 +173,29 @@ namespace opkele {
* - if there's no path component, add '/'
*/
string rfc_3986_normalize_uri(const string& uri) {
+ static const char *whitespace = " \t\r\n";
string rv;
- string::size_type colon = uri.find(':');
+ string::size_type ns = uri.find_first_not_of(whitespace);
+ if(ns==string::npos)
+ throw bad_input(OPKELE_CP_ "Can't normalize empty URI");
+ string::size_type colon = uri.find(':',ns);
if(colon==string::npos)
throw bad_input(OPKELE_CP_ "No scheme specified in URI");
transform(
- uri.begin(), uri.begin()+colon+1,
+ uri.begin()+ns, uri.begin()+colon+1,
back_inserter(rv), ::tolower );
bool s;
if(rv=="http:")
s = false;
else if(rv=="https:")
s = true;
+#ifndef NDEBUG
+ else if(rv=="file:")
+ s = false;
+#endif /* XXX: or try to make tests work some other way */
else
throw not_implemented(OPKELE_CP_ "Only http(s) URIs can be normalized here");
- string::size_type ul = uri.length();
+ string::size_type ul = uri.find_last_not_of(whitespace)+1;
if(ul <= (colon+3))
throw bad_input(OPKELE_CP_ "Unexpected end of URI being normalized encountered");
if(uri[colon+1]!='/' || uri[colon+2]!='/')
@@ -196,7 +204,7 @@ namespace opkele {
string::size_type interesting = uri.find_first_of(":/#?",colon+3);
if(interesting==string::npos) {
transform(
- uri.begin()+colon+3,uri.end(),
+ uri.begin()+colon+3,uri.begin()+ul,
back_inserter(rv), ::tolower );
rv += '/'; return rv;
}