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path: root/lib/openid_service_resolver.cc
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Diffstat (limited to 'lib/openid_service_resolver.cc') (more/less context) (ignore whitespace changes)
-rw-r--r--lib/openid_service_resolver.cc298
1 files changed, 0 insertions, 298 deletions
diff --git a/lib/openid_service_resolver.cc b/lib/openid_service_resolver.cc
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index 505e5b2..0000000
--- a/lib/openid_service_resolver.cc
+++ b/dev/null
@@ -1,298 +0,0 @@
1#include <cctype>
2#include <opkele/exception.h>
3#include <opkele/util.h>
4#include <opkele/openid_service_resolver.h>
5#include <opkele/uris.h>
6
7#define LOCATION_HEADER "X-XRDS-Location"
8
9namespace opkele {
10 static const char *whitespace = " \t\r\n";
11
12 openid_service_resolver_t::openid_service_resolver_t(const string& xp)
13 : util::curl_t(easy_init()),
14 util::expat_t(0),
15 xri_proxy(xp.empty()?"http://beta.xri.net/":xp)
16 {
17 CURLcode r;
18 (r=misc_sets())
19 || (r=set_write())
20 || (r==set_header())
21 ;
22 if(r)
23 throw opkele::exception_curl(OPKELE_CP_ "failed to set curly options",r);
24 }
25
26 static bool is_element(const XML_Char *n,const char *en) {
27 if(!strcasecmp(n,en)) return true;
28 int nl = strlen(n), enl = strlen(en);
29 if( (nl>=(enl+1)) && n[nl-enl-1]=='\t'
30 && !strcasecmp(&n[nl-enl],en) )
31 return true;
32 return false;
33 }
34 static inline bool is_qelement(const XML_Char *n,const char *qen) {
35 return !strcasecmp(n,qen);
36 }
37 static inline bool is_element(
38 const openid_service_resolver_t::parser_node_t& n,
39 const char *en) {
40 return is_element(n.element.c_str(),en);
41 }
42 static inline bool is_qelement(
43 const openid_service_resolver_t::parser_node_t& n,
44 const char *qen) {
45 return is_qelement(n.element.c_str(),qen);
46 }
47
48 void openid_service_resolver_t::start_element(const XML_Char *n,const XML_Char **a) {
49 if(state!=state_parse) return;
50 tree.push(n,a);
51 parser_node_t& t = tree.top();
52 if(is_element(n,"html") || is_element(n,"head")
53 || is_qelement(n,NSURI_XRDS "\tXRDS")
54 || is_qelement(n,NSURI_XRD "\tXRD") )
55 t.skip_tags = false;
56 else if(is_qelement(n,NSURI_XRD "\tService")
57 || is_qelement(n,NSURI_XRD "\tType")
58 || is_qelement(n,NSURI_XRD "\tURI")
59 || is_qelement(n,NSURI_OPENID10 "\tDelegate")
60 || is_qelement(n,NSURI_XRD "\tCanonicalID") )
61 t.skip_tags = t.skip_text = false;
62 else if(is_element(n,"body"))
63 state = state_stopping_body;
64 }
65 void openid_service_resolver_t::end_element(const XML_Char *n) {
66 if(state!=state_parse) return;
67 assert(tree.top().element == n);
68 pop_tag();
69 }
70 void openid_service_resolver_t::character_data(const XML_Char *s,int l) {
71 if(state!=state_parse) return;
72 if( !( tree.empty() || tree.top().skip_text ) )
73 tree.top().content.append(s,l);
74 }
75
76 static void copy_trim_whitespace(string& to,const string& from) {
77 string::size_type ns0 = from.find_first_not_of(whitespace);
78 if(ns0==string::npos) {
79 to.clear(); return;
80 }
81 string::size_type ns1 = from.find_last_not_of(whitespace);
82 assert(ns1!=string::npos);
83 to.assign(from,ns0,ns1-ns0+1);
84 }
85
86 void openid_service_resolver_t::pop_tag() {
87 assert(!tree.empty());
88 parser_node_t& t = tree.top();
89 if( is_element(t,"meta")
90 && !strcasecmp(t.attrs["http-equiv"].c_str(),LOCATION_HEADER) ) {
91 xrds_location = t.attrs["content"];
92 }else if( is_element(t,"link") ) {
93 parser_node_t::attrs_t::const_iterator ir = t.attrs.find("rel");
94 if(ir!=t.attrs.end()) {
95 const string& rels = ir->second;
96 for(string::size_type ns = rels.find_first_not_of(whitespace);
97 ns!=string::npos;
98 ns=rels.find_first_not_of(whitespace,ns)) {
99 string::size_type s = rels.find_first_of(whitespace,ns);
100 string rel;
101 if(s==string::npos) {
102 rel.assign(rels,ns,string::npos);
103 ns = string::npos;
104 }else{
105 rel.assign(rels,ns,s-ns);
106 ns = s;
107 }
108 if(rel=="openid.server")
109 copy_trim_whitespace(html_SEP.xrd_URI,t.attrs["href"]);
110 else if(rel=="openid.delegate")
111 copy_trim_whitespace(html_SEP.openid_Delegate,t.attrs["href"]);
112 }
113 }
114 }else if( is_element(t,"head") )
115 state = state_stopping_head;
116 else if( is_qelement(t,NSURI_XRD "\tXRD")) {
117 if( !(
118 (
119 xri_mode
120 && t.auth_info.canonical_id.empty()
121 ) ||
122 t.auth_info.auth_SEP.xrd_Type.empty()
123 ) )
124 auth_info = t.auth_info;
125 }else if( tree.size()>1 ) {
126 parser_node_t& p = tree.parent();
127 if( is_qelement(p,NSURI_XRD "\tService") ) {
128 if( is_qelement(t,NSURI_XRD "\tType") ) {
129 if(t.content==STURI_OPENID10) {
130 string tmp; copy_trim_whitespace(tmp,t.content);
131 p.auth_info.auth_SEP.xrd_Type.insert(tmp);
132 }
133 }else if( is_qelement(t,NSURI_XRD "\tURI") )
134 copy_trim_whitespace(p.auth_info.auth_SEP.xrd_URI,t.content);
135 else if( is_qelement(t,NSURI_OPENID10 "\tDelegate") )
136 copy_trim_whitespace(p.auth_info.auth_SEP.openid_Delegate,t.content);
137 }else if( is_qelement(p,NSURI_XRD "\tXRD") ) {
138 if(is_qelement(t,NSURI_XRD "\tService") ) {
139 if( !t.auth_info.auth_SEP.xrd_Type.empty() ) {
140 parser_node_t::attrs_t::const_iterator ip
141 = t.attrs.find("priority");
142 if(ip!=t.attrs.end()) {
143 const char *nptr = ip->second.c_str();
144 char *eptr = 0;
145 t.auth_info.auth_SEP.priority = strtol(nptr,&eptr,10);
146 if(nptr==eptr)
147 t.auth_info.auth_SEP.priority = LONG_MAX;
148 }
149 if( (t.auth_info.auth_SEP.priority < p.auth_info.auth_SEP.priority)
150 || p.auth_info.auth_SEP.xrd_Type.empty() )
151 p.auth_info.auth_SEP = t.auth_info.auth_SEP;
152 }
153 }else if( is_qelement(t,NSURI_XRD "\tCanonicalID") )
154 copy_trim_whitespace(p.auth_info.canonical_id,t.content);
155 }
156 }
157
158 tree.pop();
159 }
160
161 size_t openid_service_resolver_t::write(void *p,size_t s,size_t nm) {
162 if(state != state_parse)
163 return 0;
164 /* TODO: limit total size */
165 size_t bytes = s*nm;
166 parse((const char *)p,bytes,false);
167 return bytes;
168 }
169
170 size_t openid_service_resolver_t::header(void *p,size_t s,size_t nm) {
171 size_t bytes = s*nm;
172 const char *h = (const char *)p;
173 const char *colon = (const char*)memchr(p,':',bytes);
174 const char *space = (const char*)memchr(p,' ',bytes);
175 if(space && ( (!colon) || space<colon ) ) {
176 xrds_location.clear(); http_content_type.clear();
177 }else if(colon) {
178 const char *hv = ++colon;
179 int hnl = colon-h;
180 int rb;
181 for(rb = bytes-hnl-1;
182 rb>0 && isspace(*hv);
183 ++hv,--rb );
184 while(rb>0 && isspace(hv[rb-1]))
185 --rb;
186 if(rb) {
187 if( (hnl >= sizeof(LOCATION_HEADER))
188 && !strncasecmp(h,LOCATION_HEADER ":",
189 sizeof(LOCATION_HEADER)) ) {
190 xrds_location.assign(hv,rb);
191 }else if( (hnl >= sizeof("Content-Type"))
192 && !strncasecmp(h,"Content-Type:",
193 sizeof("Content-Type")) ) {
194 const char *sc = (const char*)memchr(
195 hv,';',rb);
196 http_content_type.assign(
197 hv,sc?(sc-hv):rb );
198 }
199 }
200 }
201 return curl_t::header(p,s,nm);
202 }
203
204 void openid_service_resolver_t::discover_service(const string& url,bool xri) {
205 CURLcode r = easy_setopt(CURLOPT_URL,url.c_str());
206 if(r)
207 throw opkele::exception_curl(OPKELE_CP_ "failed to set curly urlie",r);
208
209 (*(expat_t*)this) = parser_create_ns();
210 set_user_data(); set_element_handler();
211 set_character_data_handler();
212 tree.clear();
213 state = state_parse;
214
215 r = easy_perform();
216 if(r && r!=CURLE_WRITE_ERROR)
217 throw exception_curl(OPKELE_CP_ "failed to perform curly request",r);
218
219 parse(0,0,true);
220 while(!tree.empty()) pop_tag();
221 }
222
223 const openid_auth_info_t& openid_service_resolver_t::resolve(const string& id) {
224 auth_info = openid_auth_info_t();
225 html_SEP = openid_auth_SEP_t();
226
227 string::size_type fns = id.find_first_not_of(whitespace);
228 if(fns==string::npos)
229 throw opkele::bad_input(OPKELE_CP_ "whitespace-only identity");
230 string::size_type lns = id.find_last_not_of(whitespace);
231 assert(lns!=string::npos);
232 if(!strncasecmp(
233 id.c_str()+fns,"xri://",
234 sizeof("xri://")-1))
235 fns+=sizeof("xri://")-1;
236 string nid(id,fns,lns-fns+1);
237 if(nid.empty())
238 throw opkele::bad_input(OPKELE_CP_ "nothing significant in identity");
239 if(strchr("=@+$!(",*nid.c_str())) {
240 discover_service(
241 xri_proxy + util::url_encode(nid) +
242 "?_xrd_t=" STURI_OPENID10 "&_xrd_r=application/xrd+xml;sep=true",
243 true );
244 if(auth_info.canonical_id.empty()
245 || auth_info.auth_SEP.xrd_Type.empty() )
246 throw opkele::failed_lookup(OPKELE_CP_ "no OpenID service for XRI found");
247 }else{
248 const char *np = nid.c_str();
249 if( (strncasecmp(np,"http",4) || strncmp(
250 tolower(*(np+4))=='s'? np+5 : np+4, "://", 3))
251#ifndef NDEBUG
252 && strncasecmp(np,"file:///",sizeof("file:///")-1)
253 #endif /* XXX: or how do I let tests work? */
254 )
255 nid.insert(0,"http://");
256 string::size_type fp = nid.find('#');
257 if(fp!=string::npos) {
258 string::size_type qp = nid.find('?');
259 if(qp==string::npos || qp<fp) {
260 nid.erase(fp);
261 }else if(qp>fp)
262 nid.erase(fp,qp-fp);
263 }
264 discover_service(nid);
265 const char *eu = 0;
266 CURLcode r = easy_getinfo(CURLINFO_EFFECTIVE_URL,&eu);
267 if(r)
268 throw exception_curl(OPKELE_CP_ "failed to get CURLINFO_EFFECTIVE_URL",r);
269 string canonicalized_id = util::rfc_3986_normalize_uri(eu);
270 if(xrds_location.empty()) {
271 if(auth_info.auth_SEP.xrd_Type.empty()) {
272 if(html_SEP.xrd_URI.empty())
273 throw opkele::failed_lookup(OPKELE_CP_ "no OpenID 1.0 service discovered");
274 auth_info.auth_SEP = html_SEP;
275 auth_info.auth_SEP.xrd_Type.clear(); auth_info.auth_SEP.xrd_Type.insert( STURI_OPENID10 );
276 auth_info.canonical_id = canonicalized_id;
277 }else{
278 if(auth_info.canonical_id.empty())
279 auth_info.canonical_id = canonicalized_id;
280 }
281 }else{
282 discover_service(xrds_location);
283 if(auth_info.auth_SEP.xrd_Type.empty()) {
284 if(html_SEP.xrd_URI.empty())
285 throw opkele::failed_lookup(OPKELE_CP_ "no OpenID 1.0 service discovered");
286 auth_info.auth_SEP = html_SEP;
287 auth_info.auth_SEP.xrd_Type.clear(); auth_info.auth_SEP.xrd_Type.insert( STURI_OPENID10 );
288 auth_info.canonical_id = canonicalized_id;
289 }else{
290 if(auth_info.canonical_id.empty())
291 auth_info.canonical_id = canonicalized_id;
292 }
293 }
294 }
295 return auth_info;
296 }
297
298}