| -rw-r--r-- | lib/message.cc | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/lib/message.cc b/lib/message.cc new file mode 100644 index 0000000..b2324b7 --- a/dev/null +++ b/lib/message.cc @@ -0,0 +1,194 @@ +#include <cassert> +#include <opkele/types.h> +#include <opkele/exception.h> +#include <opkele/util.h> +#include <opkele/debug.h> + +#include "config.h" + +namespace opkele { + using std::input_iterator_tag; + using std::unary_function; + + + struct __om_ns_finder : public unary_function<const string&,bool> { + public: + const basic_openid_message& om; + const string& uri; + + __om_ns_finder(const basic_openid_message& m, + const string& u) : om(m), uri(u) { } + + result_type operator()(argument_type f) { + return + (!strncmp(f.c_str(),"ns.",sizeof("ns.")-1)) + && om.get_field(f)==uri ; + } + }; + + bool basic_openid_message::has_ns(const string& uri) const { + fields_iterator ei = fields_end(); + fields_iterator i = find_if(fields_begin(),fields_end(), + __om_ns_finder(*this,uri)); + return !(i==ei); + } + string basic_openid_message::get_ns(const string& uri) const { + fields_iterator ei = fields_end(); + fields_iterator i = find_if(fields_begin(),fields_end(), + __om_ns_finder(*this,uri)); + if(i==ei) + throw failed_lookup(OPKELE_CP_ string("failed to find namespace ")+uri); + return i->substr(3); + } + + void basic_openid_message::from_keyvalues(const string& kv) { + reset_fields(); + string::size_type p = 0; + while(true) { + string::size_type co = kv.find(':',p); + if(co==string::npos) + break; +#ifndef POSTELS_LAW + string::size_type nl = kv.find('\n',co+1); + if(nl==string::npos) + throw bad_input(OPKELE_CP_ "malformed input"); + if(nl>co) + set_field(kv.substr(p,co-p),kv.substr(co+1,nl-co-1)); + p = nl+1; +#else /* POSTELS_LAW */ + string::size_type lb = kv.find_first_of("\r\n",co+1); + if(lb==string::npos) { + set_field(kv.substr(p,co-p),kv.substr(co+1)); + break; + } + if(lb>co) + set_field(kv.substr(p,co-p),kv.substr(co+1,lb-co-1)); + string::size_type nolb = kv.find_first_not_of("\r\n",lb); + if(nolb==string::npos) + break; + p = nolb; +#endif /* POSTELS_LAW */ + } + } + + struct __om_kv_outputter : public unary_function<const string&,void> { + public: + const basic_openid_message& om; + ostream& os; + + __om_kv_outputter(const basic_openid_message& m,ostream& s) + : om(m), os(s) { } + + result_type operator()(argument_type f) { + os << f << ':' << om.get_field(f) << '\n'; + } + }; + + void basic_openid_message::to_keyvalues(ostream& o) const { + for_each(fields_begin(),fields_end(),__om_kv_outputter(*this,o)); + } + + struct __om_html_outputter : public unary_function<const string&,void> { + public: + const basic_openid_message& om; + ostream& os; + const char *pfx; + + __om_html_outputter(const basic_openid_message& m,ostream& s,const char *p=0) + : om(m), os(s), pfx(p) { } + + result_type operator()(argument_type f) { + os << + "<input type=\"hidden\"" + " name=\""; + if(pfx) + os << util::attr_escape(pfx); + os << util::attr_escape(f) << "\"" + " value=\"" << util::attr_escape(om.get_field(f)) << "\" />"; + } + }; + + void basic_openid_message::to_htmlhiddens(ostream& o,const char* pfx) const { + for_each(fields_begin(),fields_end(),__om_html_outputter(*this,o,pfx)); + } + + void basic_openid_message::add_to_signed(const string& fields) { + string::size_type fnc = fields.find_first_not_of(","); + if(fnc==string::npos) + throw bad_input(OPKELE_CP_ "Trying to add nothing in particular to the list of signed fields"); + string signeds; + try { + signeds = get_field("signed"); + string::size_type lnc = signeds.find_last_not_of(","); + if(lnc==string::npos) + signeds.assign(fields,fnc,fields.size()-fnc); + else{ + string::size_type ss = signeds.size(); + if(lnc==(ss-1)) { + signeds+= ','; + signeds.append(fields,fnc,fields.size()-fnc); + }else{ + if(lnc<(ss-2)) + signeds.replace(lnc+2,ss-lnc-2, + fields,fnc,fields.size()-fnc); + else + signeds.append(fields,fnc,fields.size()-fnc); + } + } + }catch(failed_lookup&) { + signeds.assign(fields,fnc,fields.size()-fnc); + } + set_field("signed",signeds); + } + + string basic_openid_message::find_ns(const string& uri,const char *pfx) const { + try { + return get_ns(uri); + }catch(failed_lookup&) { + return pfx; + } + } + string basic_openid_message::allocate_ns(const string& uri,const char *pfx) { + if(!has_field("ns")) + return pfx; + if(has_ns(uri)) + throw bad_input(OPKELE_CP_ "OpenID message already contains namespace"); + string rv = pfx; + if(has_field("ns."+rv)) { + string::reference c=rv[rv.length()]; + for(c='a';c<='z' && has_field("ns."+rv);++c); + if(c=='z') + throw exception(OPKELE_CP_ "Failed to allocate namespace"); + } + set_field("ns."+rv,uri); + return rv; + } + + bool openid_message_t::has_field(const string& n) const { + return find(n)!=end(); + } + const string& openid_message_t::get_field(const string& n) const { + const_iterator i=find(n); + if(i==end()) + throw failed_lookup(OPKELE_CP_ n+": no such field"); + return i->second; + } + + openid_message_t::fields_iterator openid_message_t::fields_begin() const { + return util::map_keys_iterator<const_iterator,string,const string&,const string*>(begin(),end()); + } + openid_message_t::fields_iterator openid_message_t::fields_end() const { + return util::map_keys_iterator<const_iterator,string,const string&,const string*>(end(),end()); + } + + void openid_message_t::reset_fields() { + clear(); + } + void openid_message_t::set_field(const string& n,const string& v) { + (*this)[n]=v; + } + void openid_message_t::reset_field(const string& n) { + erase(n); + } + +} |