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path: root/lib/consumer.cc
authorMichael Krelin <hacker@klever.net>2009-09-10 06:00:38 (UTC)
committer Michael Krelin <hacker@klever.net>2009-09-13 11:43:55 (UTC)
commit570ab021e0dcf507ecd6b7118151fb90feeab779 (patch) (side-by-side diff)
treece2f904618849e5aba61a79999768442a754e953 /lib/consumer.cc
parent5e8d46cb591582918f4d3d4bbdbd29fee207498a (diff)
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removed legacy compatibility code and pcre dependency
Signed-off-by: Michael Krelin <hacker@klever.net>
Diffstat (limited to 'lib/consumer.cc') (more/less context) (ignore whitespace changes)
-rw-r--r--lib/consumer.cc396
1 files changed, 0 insertions, 396 deletions
diff --git a/lib/consumer.cc b/lib/consumer.cc
deleted file mode 100644
index 801496e..0000000
--- a/lib/consumer.cc
+++ b/dev/null
@@ -1,396 +0,0 @@
-#include <algorithm>
-#include <cassert>
-#include <cstring>
-#include <opkele/util.h>
-#include <opkele/util-internal.h>
-#include <opkele/curl.h>
-#include <opkele/exception.h>
-#include <opkele/data.h>
-#include <opkele/consumer.h>
-#include <openssl/sha.h>
-#include <openssl/hmac.h>
-#include <iostream>
-
-#include "config.h"
-
-#include <pcre.h>
-
-namespace opkele {
- using namespace std;
- using util::curl_t;
- using util::curl_pick_t;
-
- class pcre_matches_t {
- public:
- int *_ov;
- int _s;
-
- pcre_matches_t() : _ov(0), _s(0) { }
- pcre_matches_t(int s) : _ov(0), _s(s) {
- if(_s&1) ++_s;
- _s += _s>>1;
- _ov = new int[_s];
- }
- ~pcre_matches_t() throw() { if(_ov) delete[] _ov; }
-
- int begin(int i) const { return _ov[i<<1]; }
- int end(int i) const { return _ov[(i<<1)+1]; }
- int length(int i) const { int t=i<<1; return _ov[t+1]-_ov[t]; }
- };
-
- class pcre_t {
- public:
- pcre *_p;
-
- pcre_t() : _p(0) { }
- pcre_t(pcre *p) : _p(p) { }
- pcre_t(const char *re,int opts) : _p(0) {
- static const char *errptr; static int erroffset;
- _p = pcre_compile(re,opts,&errptr,&erroffset,NULL);
- if(!_p)
- throw internal_error(OPKELE_CP_ string("Failed to compile regexp: ")+errptr);
- }
- ~pcre_t() throw() { if(_p) (*pcre_free)(_p); }
-
- pcre_t& operator=(pcre *p) { if(_p) (*pcre_free)(_p); _p=p; return *this; }
-
- operator const pcre*(void) const { return _p; }
- operator pcre*(void) { return _p; }
-
- int exec(const string& s,pcre_matches_t& m) {
- if(!_p)
- throw internal_error(OPKELE_CP_ "Trying to execute absent regexp");
- return pcre_exec(_p,NULL,s.c_str(),s.length(),0,0,m._ov,m._s);
- }
- };
-
- assoc_t consumer_t::associate(const string& server) {
- util::dh_t dh = DH_new();
- if(!dh)
- throw exception_openssl(OPKELE_CP_ "failed to DH_new()");
- dh->p = util::dec_to_bignum(data::_default_p);
- dh->g = util::dec_to_bignum(data::_default_g);
- if(!DH_generate_key(dh))
- throw exception_openssl(OPKELE_CP_ "failed to DH_generate_key()");
- string request =
- "openid.mode=associate"
- "&openid.assoc_type=HMAC-SHA1"
- "&openid.session_type=DH-SHA1"
- "&openid.dh_consumer_public=";
- request += util::url_encode(util::bignum_to_base64(dh->pub_key));
- curl_pick_t curl = curl_pick_t::easy_init();
- if(!curl)
- throw exception_curl(OPKELE_CP_ "failed to initialize curl");
- CURLcode r;
- (r=curl.misc_sets())
- || (r=curl.easy_setopt(CURLOPT_URL,server.c_str()))
- || (r=curl.easy_setopt(CURLOPT_POST,1))
- || (r=curl.easy_setopt(CURLOPT_POSTFIELDS,request.data()))
- || (r=curl.easy_setopt(CURLOPT_POSTFIELDSIZE,request.length()))
- || (r=curl.set_write())
- ;
- if(r)
- throw exception_curl(OPKELE_CP_ "failed to set curly options",r);
- if( (r=curl.easy_perform()) )
- throw exception_curl(OPKELE_CP_ "failed to perform curly request",r);
- params_t p; p.parse_keyvalues(curl.response);
- if(p.has_param("assoc_type") && p.get_param("assoc_type")!="HMAC-SHA1")
- throw bad_input(OPKELE_CP_ "unsupported assoc_type");
- string st;
- if(p.has_param("session_type")) st = p.get_param("session_type");
- if((!st.empty()) && st!="DH-SHA1")
- throw bad_input(OPKELE_CP_ "unsupported session_type");
- secret_t secret;
- if(st.empty()) {
- secret.from_base64(p.get_param("mac_key"));
- }else{
- util::bignum_t s_pub = util::base64_to_bignum(p.get_param("dh_server_public"));
- vector<unsigned char> ck(DH_size(dh)+1);
- unsigned char *ckptr = &(ck.front())+1;
- int cklen = DH_compute_key(ckptr,s_pub,dh);
- if(cklen<0)
- throw exception_openssl(OPKELE_CP_ "failed to DH_compute_key()");
- if(cklen && (*ckptr)&0x80) {
- (*(--ckptr)) = 0; ++cklen;
- }
- unsigned char key_sha1[SHA_DIGEST_LENGTH];
- SHA1(ckptr,cklen,key_sha1);
- secret.enxor_from_base64(key_sha1,p.get_param("enc_mac_key"));
- }
- int expires_in = 0;
- if(p.has_param("expires_in")) {
- expires_in = util::string_to_long(p.get_param("expires_in"));
- }else if(p.has_param("issued") && p.has_param("expiry")) {
- expires_in = util::w3c_to_time(p.get_param("expiry"))-util::w3c_to_time(p.get_param("issued"));
- }else
- throw bad_input(OPKELE_CP_ "no expiration information");
- return store_assoc(server,p.get_param("assoc_handle"),secret,expires_in);
- }
-
- string consumer_t::checkid_immediate(const string& identity,const string& return_to,const string& trust_root,extension_t *ext) {
- return checkid_(mode_checkid_immediate,identity,return_to,trust_root,ext);
- }
- string consumer_t::checkid_setup(const string& identity,const string& return_to,const string& trust_root,extension_t *ext) {
- return checkid_(mode_checkid_setup,identity,return_to,trust_root,ext);
- }
- string consumer_t::checkid_(mode_t mode,const string& identity,const string& return_to,const string& trust_root,extension_t *ext) {
- params_t p;
- if(mode==mode_checkid_immediate)
- p["mode"]="checkid_immediate";
- else if(mode==mode_checkid_setup)
- p["mode"]="checkid_setup";
- else
- throw bad_input(OPKELE_CP_ "unknown checkid_* mode");
- string iurl = canonicalize(identity);
- string server, delegate;
- retrieve_links(iurl,server,delegate);
- p["identity"] = delegate.empty()?iurl:delegate;
- if(!trust_root.empty())
- p["trust_root"] = trust_root;
- p["return_to"] = return_to;
- try {
- string ah = find_assoc(server)->handle();
- p["assoc_handle"] = ah;
- }catch(failed_lookup& fl) {
- string ah = associate(server)->handle();
- p["assoc_handle"] = ah;
- }
- if(ext) ext->checkid_hook(p);
- return p.append_query(server);
- }
-
- void consumer_t::id_res(const params_t& pin,const string& identity,extension_t *ext) {
- if(pin.has_param("openid.user_setup_url"))
- throw id_res_setup(OPKELE_CP_ "assertion failed, setup url provided",pin.get_param("openid.user_setup_url"));
- string server,delegate;
- retrieve_links(identity.empty()?pin.get_param("openid.identity"):canonicalize(identity),server,delegate);
- params_t ps;
- try {
- assoc_t assoc = retrieve_assoc(server,pin.get_param("openid.assoc_handle"));
- if(assoc->is_expired())
- throw id_res_expired_on_delivery(OPKELE_CP_ "retrieve_assoc() has returned expired handle");
- const string& sigenc = pin.get_param("openid.sig");
- vector<unsigned char> sig;
- util::decode_base64(sigenc,sig);
- const string& slist = pin.get_param("openid.signed");
- string kv;
- string::size_type p = 0;
- while(true) {
- string::size_type co = slist.find(',',p);
- string f = (co==string::npos)?slist.substr(p):slist.substr(p,co-p);
- kv += f;
- kv += ':';
- f.insert(0,"openid.");
- kv += pin.get_param(f);
- kv += '\n';
- if(ext) ps[f.substr(sizeof("openid.")-1)] = pin.get_param(f);
- if(co==string::npos)
- break;
- p = co+1;
- }
- secret_t secret = assoc->secret();
- unsigned int md_len = 0;
- unsigned char *md = HMAC(
- EVP_sha1(),
- &(secret.front()),secret.size(),
- (const unsigned char *)kv.data(),kv.length(),
- 0,&md_len);
- if(sig.size()!=md_len || memcmp(&(sig.front()),md,md_len))
- throw id_res_mismatch(OPKELE_CP_ "signature mismatch");
- }catch(failed_lookup& e) {
- const string& slist = pin.get_param("openid.signed");
- string::size_type pp = 0;
- params_t p;
- while(true) {
- string::size_type co = slist.find(',',pp);
- string f = "openid.";
- f += (co==string::npos)?slist.substr(pp):slist.substr(pp,co-pp);
- p[f] = pin.get_param(f);
- if(co==string::npos)
- break;
- pp = co+1;
- }
- p["openid.assoc_handle"] = pin.get_param("openid.assoc_handle");
- p["openid.sig"] = pin.get_param("openid.sig");
- p["openid.signed"] = pin.get_param("openid.signed");
- try {
- string ih = pin.get_param("openid.invalidate_handle");
- p["openid.invalidate_handle"] = ih;
- }catch(failed_lookup& fl) { }
- try {
- check_authentication(server,p);
- }catch(failed_check_authentication& fca) {
- throw id_res_failed(OPKELE_CP_ "failed to check_authentication()");
- }
- }
- if(ext) ext->id_res_hook(pin,ps);
- }
-
- void consumer_t::check_authentication(const string& server,const params_t& p) {
- string request = "openid.mode=check_authentication";
- for(params_t::const_iterator i=p.begin();i!=p.end();++i) {
- if(i->first!="openid.mode") {
- request += '&';
- request += i->first;
- request += '=';
- request += util::url_encode(i->second);
- }
- }
- curl_pick_t curl = curl_pick_t::easy_init();
- if(!curl)
- throw exception_curl(OPKELE_CP_ "failed to initialize curl");
- CURLcode r;
- (r=curl.misc_sets())
- || (r=curl.easy_setopt(CURLOPT_URL,server.c_str()))
- || (r=curl.easy_setopt(CURLOPT_POST,1))
- || (r=curl.easy_setopt(CURLOPT_POSTFIELDS,request.data()))
- || (r=curl.easy_setopt(CURLOPT_POSTFIELDSIZE,request.length()))
- || (r=curl.set_write())
- ;
- if(r)
- throw exception_curl(OPKELE_CP_ "failed to set curly options",r);
- if( (r=curl.easy_perform()) )
- throw exception_curl(OPKELE_CP_ "failed to perform curly request",r);
- params_t pp; pp.parse_keyvalues(curl.response);
- if(pp.has_param("invalidate_handle"))
- invalidate_assoc(server,pp.get_param("invalidate_handle"));
- if(pp.has_param("is_valid")) {
- if(pp.get_param("is_valid")=="true")
- return;
- }else if(pp.has_param("lifetime")) {
- if(util::string_to_long(pp.get_param("lifetime")))
- return;
- }
- throw failed_check_authentication(OPKELE_CP_ "failed to verify response");
- }
-
- void consumer_t::retrieve_links(const string& url,string& server,string& delegate) {
- server.erase();
- delegate.erase();
- curl_pick_t curl = curl_pick_t::easy_init();
- if(!curl)
- throw exception_curl(OPKELE_CP_ "failed to initialize curl");
- string& html = curl.response;
- CURLcode r;
- (r=curl.misc_sets())
- || (r=curl.easy_setopt(CURLOPT_URL,url.c_str()))
- || (r=curl.set_write());
- ;
- if(r)
- throw exception_curl(OPKELE_CP_ "failed to set curly options",r);
- r = curl.easy_perform();
- if(r && r!=CURLE_WRITE_ERROR)
- throw exception_curl(OPKELE_CP_ "failed to perform curly request",r);
- static const char *re_bre = "<\\s*body\\b", *re_hdre = "<\\s*head[^>]*>",
- *re_lre = "<\\s*link\\b([^>]+)>",
- *re_rre = "\\brel\\s*=\\s*['\"]([^'\"]+)['\"]",
- *re_hre = "\\bhref\\s*=\\s*['\"]\\s*([^'\"\\s]+)\\s*['\"]";
- pcre_matches_t m1(3), m2(3);
- pcre_t bre(re_bre,PCRE_CASELESS);
- if(bre.exec(html,m1)>0)
- html.erase(m1.begin(0));
- pcre_t hdre(re_hdre,PCRE_CASELESS);
- if(hdre.exec(html,m1)<=0)
- throw bad_input(OPKELE_CP_ "failed to find <head>");
- html.erase(0,m1.end(0)+1);
- pcre_t lre(re_lre,PCRE_CASELESS), rre(re_rre,PCRE_CASELESS), hre(re_hre,PCRE_CASELESS);
- bool gotit = false;
- while( (!gotit) && lre.exec(html,m1)>=2 ) {
- static const char *whitespace = " \t";
- string attrs(html,m1.begin(1),m1.length(1));
- html.erase(0,m1.end(0)+1);
- if(!( rre.exec(attrs,m1)>=2 && hre.exec(attrs,m2)>=2 ))
- continue;
- string rels(attrs,m1.begin(1),m1.length(1));
- 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") {
- server.assign(attrs,m2.begin(1),m2.length(1));
- if(!delegate.empty()) {
- gotit = true;
- break;
- }
- }else if(rel=="openid.delegate") {
- delegate.assign(attrs,m2.begin(1),m2.length(1));
- if(!server.empty()) {
- gotit = true;
- break;
- }
- }
- }
- }
- if(server.empty())
- throw failed_assertion(OPKELE_CP_ "The location has no openid.server declaration");
- }
-
- assoc_t consumer_t::find_assoc(const string& /* server */) {
- throw failed_lookup(OPKELE_CP_ "no find_assoc() provided");
- }
-
- string consumer_t::normalize(const string& url) {
- string rv = url;
- // strip leading and trailing spaces
- string::size_type i = rv.find_first_not_of(" \t\r\n");
- if(i==string::npos)
- throw bad_input(OPKELE_CP_ "empty URL");
- if(i)
- rv.erase(0,i);
- i = rv.find_last_not_of(" \t\r\n");
- assert(i!=string::npos);
- if(i<(rv.length()-1))
- rv.erase(i+1);
- // add missing http://
- i = rv.find("://");
- if(i==string::npos) { // primitive. but do we need more?
- rv.insert(0,"http://");
- i = sizeof("http://")-1;
- }else{
- i += sizeof("://")-1;
- }
- string::size_type qm = rv.find('?',i);
- string::size_type sl = rv.find('/',i);
- if(qm!=string::npos) {
- if(sl==string::npos || sl>qm)
- rv.insert(qm,1,'/');
- }else{
- if(sl==string::npos)
- rv += '/';
- }
- return rv;
- }
-
- string consumer_t::canonicalize(const string& url) {
- string rv = normalize(url);
- curl_t curl = curl_t::easy_init();
- if(!curl)
- throw exception_curl(OPKELE_CP_ "failed to initialize curl()");
- string html;
- CURLcode r;
- (r=curl.misc_sets())
- || (r=curl.easy_setopt(CURLOPT_URL,rv.c_str()))
- || (r=curl.easy_setopt(CURLOPT_NOBODY,1))
- ;
- if(r)
- throw exception_curl(OPKELE_CP_ "failed to set curly options",r);
- r = curl.easy_perform();
- if(r)
- throw exception_curl(OPKELE_CP_ "failed to perform curly request",r);
- const char *eu = 0;
- r = curl.easy_getinfo(CURLINFO_EFFECTIVE_URL,&eu);
- if(r)
- throw exception_curl(OPKELE_CP_ "failed to get CURLINFO_EFFECTIVE_URL",r);
- rv = eu;
- return normalize(rv);
- }
-
-}