removed legacy compatibility code and pcre dependency

Signed-off-by: Michael Krelin <hacker@klever.net>

3 files changed, 2 insertions, 572 deletions

diff --git a/lib/Makefile.am b/lib/Makefile.am
index e76d7c0..8610597 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -4,26 +4,24 @@ AM_CPPFLAGS = ${CPPFLAGS_DEBUG}
 DEFAULT_INCLUDES = -I${top_builddir}
 INCLUDES = \
 	   -I${top_builddir}/include/ -I${top_srcdir}/include/ \
 	   ${KONFORKA_CFLAGS} \
 	   ${OPENSSL_CFLAGS} \
 	   ${LIBCURL_CPPFLAGS} \
-	   ${PCRE_CFLAGS} ${EXPAT_CFLAGS} ${TIDY_CFLAGS}
+	   ${EXPAT_CFLAGS} ${TIDY_CFLAGS}
 libopkele_la_LIBADD = \
 	${LIBCURL} \
-	${PCRE_LIBS} ${EXPAT_LIBS} \
+	${EXPAT_LIBS} \
 	${OPENSSL_LIBS} \
 	${KONFORKA_LIBS} ${TIDY_LIBS}
 
 libopkele_la_SOURCES = \
 		       params.cc \
 		       util.cc \
-		       server.cc \
 		       secret.cc \
 		       data.cc \
-		       consumer.cc \
 		       exception.cc \
 		       extension.cc \
 		       sreg.cc \
 		       extension_chain.cc \
 		       curl.cc expat.cc \
 		       discovery.cc \
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);
-    }
-
-}
diff --git a/lib/server.cc b/lib/server.cc
deleted file mode 100644
index 0dea1eb..0000000
--- a/lib/server.cc
+++ b/dev/null
@@ -1,172 +0,0 @@
-#include <cstring>
-#include <vector>
-#include <openssl/sha.h>
-#include <openssl/hmac.h>
-#include <opkele/util.h>
-#include <opkele/util-internal.h>
-#include <opkele/exception.h>
-#include <opkele/server.h>
-#include <opkele/data.h>
-
-namespace opkele {
-    using namespace std;
-
-    void server_t::associate(const params_t& pin,params_t& pout) {
-	util::dh_t dh;
-	util::bignum_t c_pub;
-	unsigned char key_sha1[SHA_DIGEST_LENGTH];
-	enum {
-	    sess_cleartext,
-	    sess_dh_sha1
-	} st = sess_cleartext;
-	if(
-		pin.has_param("openid.session_type")
-		&& pin.get_param("openid.session_type")=="DH-SHA1" ) {
-	    /* TODO: fallback to cleartext in case of exceptions here? */
-	    if(!(dh = DH_new()))
-		throw exception_openssl(OPKELE_CP_ "failed to DH_new()");
-	    c_pub = util::base64_to_bignum(pin.get_param("openid.dh_consumer_public"));
-	    if(pin.has_param("openid.dh_modulus"))
-		dh->p = util::base64_to_bignum(pin.get_param("openid.dh_modulus"));
-	    else
-		dh->p = util::dec_to_bignum(data::_default_p);
-	    if(pin.has_param("openid.dh_gen"))
-		dh->g = util::base64_to_bignum(pin.get_param("openid.dh_gen"));
-	    else
-		dh->g = util::dec_to_bignum(data::_default_g);
-	    if(!DH_generate_key(dh))
-		throw exception_openssl(OPKELE_CP_ "failed to DH_generate_key()");
-	    vector<unsigned char> ck(DH_size(dh)+1);
-	    unsigned char *ckptr = &(ck.front())+1;
-	    int cklen = DH_compute_key(ckptr,c_pub,dh);
-	    if(cklen<0)
-		throw exception_openssl(OPKELE_CP_ "failed to DH_compute_key()");
-	    if(cklen && (*ckptr)&0x80) {
-		(*(--ckptr)) = 0; ++cklen;
-	    }
-	    SHA1(ckptr,cklen,key_sha1);
-	    st = sess_dh_sha1;
-	}
-	assoc_t assoc = alloc_assoc(mode_associate);
-	time_t now = time(0);
-	pout.clear();
-	pout["assoc_type"] = assoc->assoc_type();
-	pout["assoc_handle"] = assoc->handle();
-	/* TODO: eventually remove deprecated stuff */
-	pout["issued"] = util::time_to_w3c(now);
-	pout["expiry"] = util::time_to_w3c(now+assoc->expires_in());
-	pout["expires_in"] = util::long_to_string(assoc->expires_in());
-	secret_t secret = assoc->secret();
-	switch(st) {
-	    case sess_dh_sha1:
-		pout["session_type"] = "DH-SHA1";
-		pout["dh_server_public"] = util::bignum_to_base64(dh->pub_key);
-		secret.enxor_to_base64(key_sha1,pout["enc_mac_key"]);
-		break;
-	    default:
-		secret.to_base64(pout["mac_key"]);
-		break;
-	}
-    }
-
-    void server_t::checkid_immediate(const params_t& pin,string& return_to,params_t& pout,extension_t *ext) {
-	checkid_(mode_checkid_immediate,pin,return_to,pout,ext);
-    }
-
-    void server_t::checkid_setup(const params_t& pin,string& return_to,params_t& pout,extension_t *ext) {
-	checkid_(mode_checkid_setup,pin,return_to,pout,ext);
-    }
-
-    void server_t::checkid_(mode_t mode,const params_t& pin,string& return_to,params_t& pout,extension_t *ext) {
-	if(mode!=mode_checkid_immediate && mode!=mode_checkid_setup)
-	    throw bad_input(OPKELE_CP_ "invalid checkid_* mode");
-	pout.clear();
-	assoc_t assoc;
-	try {
-	    assoc = retrieve_assoc(pin.get_param("openid.assoc_handle"));
-	}catch(failed_lookup& fl) {
-	    // no handle specified or no valid handle found, going dumb
-	    assoc = alloc_assoc(mode_checkid_setup);
-	    if(pin.has_param("openid.assoc_handle"))
-		pout["invalidate_handle"]=pin.get_param("openid.assoc_handle");
-	}
-	string trust_root;
-	try {
-	    trust_root = pin.get_param("openid.trust_root");
-	}catch(failed_lookup& fl) { }
-	string identity = pin.get_param("openid.identity");
-	return_to = pin.get_param("openid.return_to");
-	validate(*assoc,pin,identity,trust_root);
-	pout["mode"] = "id_res";
-	pout["assoc_handle"] = assoc->handle();
-	if(pin.has_param("openid.assoc_handle") && assoc->stateless())
-	    pout["invalidate_handle"] = pin.get_param("openid.assoc_handle");
-	pout["identity"] = identity;
-	pout["return_to"] = return_to;
-	/* TODO: eventually remove deprecated stuff */
-	time_t now = time(0);
-	pout["issued"] = util::time_to_w3c(now);
-	pout["valid_to"] = util::time_to_w3c(now+120);
-	pout["exipres_in"] = "120";
-	pout["signed"]="mode,identity,return_to";
-	if(ext) ext->checkid_hook(pin,pout);
-	pout["sig"] = util::base64_signature(assoc,pout);
-    }
-
-    void server_t::check_authentication(const params_t& pin,params_t& pout) {
-	vector<unsigned char>  sig;
-	const string& sigenc = pin.get_param("openid.sig");
-	util::decode_base64(sigenc,sig);
-	assoc_t assoc;
-	try {
-	    assoc = retrieve_assoc(pin.get_param("openid.assoc_handle"));
-	}catch(failed_lookup& fl) {
-	    throw failed_assertion(OPKELE_CP_ "invalid handle or handle not specified");
-	}
-	if(!assoc->stateless())
-	    throw stateful_handle(OPKELE_CP_ "will not do check_authentication on a stateful handle");
-	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 += ':';
-	    if(f=="mode")
-		kv += "id_res";
-	    else {
-		f.insert(0,"openid.");
-		kv += pin.get_param(f);
-	    }
-	    kv += '\n';
-	    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);
-	pout.clear();
-	if(sig.size()==md_len && !memcmp(&(sig.front()),md,md_len)) {
-	    pout["is_valid"]="true";
-	    pout["lifetime"]="60"; /* TODO: eventually remove deprecated stuff */
-	}else{
-	    pout["is_valid"]="false";
-	    pout["lifetime"]="0"; /* TODO: eventually remove deprecated stuff */
-	}
-	if(pin.has_param("openid.invalidate_handle")) {
-	    string h = pin.get_param("openid.invalidate_handle");
-	    try {
-		assoc_t tmp = retrieve_assoc(h);
-	    }catch(invalid_handle& ih) {
-		pout["invalidate_handle"] = h;
-	    }catch(failed_lookup& fl) { }
-	}
-    }
-
-}