| -rw-r--r-- | include/opkele/exception.h | 9 | ||||
| -rw-r--r-- | lib/basic_op.cc | 36 |
2 files changed, 45 insertions, 0 deletions
diff --git a/include/opkele/exception.h b/include/opkele/exception.h index 5c8418e..33f89cc 100644 --- a/include/opkele/exception.h +++ b/include/opkele/exception.h @@ -354,9 +354,18 @@ namespace opkele { class non_identity : public exception { public: non_identity(OPKELE_E_PARS) : exception(OPKELE_E_CONS) { } }; + /** + * thrown if return_to URL doesn't match realm + */ + class bad_return_to : public exception { + public: + bad_return_to(OPKELE_E_PARS) + : exception(OPKELE_E_CONS) { } + }; + } #endif /* __OPKELE_EXCEPTION_H */ diff --git a/lib/basic_op.cc b/lib/basic_op.cc index 22012bc..f7573aa 100644 --- a/lib/basic_op.cc +++ b/lib/basic_op.cc @@ -1,17 +1,20 @@ #include <time.h> #include <cassert> +#include <algorithm> #include <openssl/sha.h> #include <openssl/hmac.h> #include <opkele/data.h> #include <opkele/basic_op.h> #include <opkele/exception.h> #include <opkele/util.h> #include <opkele/uris.h> namespace opkele { + using std::pair; + using std::mismatch; void basic_op::reset_vars() { assoc.reset(); return_to.clear(); realm.clear(); claimed_id.clear(); identity.clear(); invalidate_handle.clear(); @@ -314,7 +317,40 @@ namespace opkele { return oum; }catch(failed_check_authentication& ) { oum.set_field("is_valid","false"); return oum; } + void basic_op::verify_return_to() { + string nrealm = opkele::util::rfc_3986_normalize_uri(realm); + if(nrealm.find('#')!=string::npos) + throw opkele::bad_realm(OPKELE_CP_ "authentication realm contains URI fragment"); + string nrt = opkele::util::rfc_3986_normalize_uri(return_to); + string::size_type pr = nrealm.find("://"); + string::size_type prt = nrt.find("://"); + assert(!(pr==string::npos || prt==string::npos)); + pr += sizeof("://")-1; + prt += sizeof("://")-1; + if(!strncmp(nrealm.c_str()+pr,"*.",2)) { + pr = nrealm.find('.',pr); + prt = nrt.find('.',prt); + assert(pr!=string::npos); + if(prt==string::npos) + throw bad_return_to( + OPKELE_CP_ "return_to URL doesn't match realm"); + // TODO: check for overgeneralized realm + } + string::size_type lr = nrealm.length(); + string::size_type lrt = nrt.length(); + if( (lrt-prt) < (lr-pr) ) + throw bad_return_to( + OPKELE_CP_ "return_to URL doesn't match realm"); + pair<const char*,const char*> mp = mismatch( + nrealm.c_str()+pr,nrealm.c_str()+lr, + nrt.c_str()+prt); + if( (*(mp.first-1))!='/' + && !strchr("/?#",*mp.second) ) + throw bad_return_to( + OPKELE_CP_ "return_to URL doesn't match realm"); + } + } |