1 #include <cassert>
2 #include <algorithm>
3 
4 #include <opkele/types.h>
5 #include <opkele/exception.h>
6 #include <opkele/util.h>
7 #include <opkele/debug.h>
8 
9 #include "config.h"
10 
11 namespace opkele {
12     using std::input_iterator_tag;
13     using std::unary_function;
14 
15 
16     struct __om_ns_finder : public unary_function<const string&,bool> {
17 	public:
18 	    const basic_openid_message& om;
19 	    const string& uri;
20 
__om_ns_finderopkele::__om_ns_finder21 	    __om_ns_finder(const basic_openid_message& m,
22 		    const string& u) : om(m), uri(u) { }
23 
operator ()opkele::__om_ns_finder24 	    result_type operator()(argument_type f) {
25 		return
26 		    (!strncmp(f.c_str(),"ns.",sizeof("ns.")-1))
27 			&& om.get_field(f)==uri ;
28 	    }
29     };
30 
has_ns(const string & uri) const31     bool basic_openid_message::has_ns(const string& uri) const {
32 	fields_iterator ei = fields_end();
33 	fields_iterator i = find_if(fields_begin(),fields_end(),
34 		__om_ns_finder(*this,uri));
35 	return !(i==ei);
36     }
get_ns(const string & uri) const37     string basic_openid_message::get_ns(const string& uri) const {
38 	fields_iterator ei = fields_end();
39 	fields_iterator i = find_if(fields_begin(),fields_end(),
40 		__om_ns_finder(*this,uri));
41 	if(i==ei)
42 	    throw failed_lookup(OPKELE_CP_ string("failed to find namespace ")+uri);
43 	return i->substr(3);
44     }
45 
from_keyvalues(const string & kv)46     void basic_openid_message::from_keyvalues(const string& kv) {
47 	reset_fields();
48 	string::size_type p = 0;
49 	while(true) {
50 	    string::size_type co = kv.find(':',p);
51 	    if(co==string::npos)
52 		break;
53 #ifndef POSTELS_LAW
54 	    string::size_type nl = kv.find('\n',co+1);
55 	    if(nl==string::npos)
56 		throw bad_input(OPKELE_CP_ "malformed input");
57 	    if(nl>co)
58 		set_field(kv.substr(p,co-p),kv.substr(co+1,nl-co-1));
59 	    p = nl+1;
60 #else /* POSTELS_LAW */
61 	    string::size_type lb = kv.find_first_of("\r\n",co+1);
62 	    if(lb==string::npos) {
63 		set_field(kv.substr(p,co-p),kv.substr(co+1));
64 		break;
65 	    }
66 	    if(lb>co)
67 		set_field(kv.substr(p,co-p),kv.substr(co+1,lb-co-1));
68 	    string::size_type nolb = kv.find_first_not_of("\r\n",lb);
69 	    if(nolb==string::npos)
70 		break;
71 	    p = nolb;
72 #endif /* POSTELS_LAW */
73 	}
74     }
75 
76     struct __om_kv_outputter : public unary_function<const string&,void> {
77 	public:
78 	    const basic_openid_message& om;
79 	    ostream& os;
80 
__om_kv_outputteropkele::__om_kv_outputter81 	    __om_kv_outputter(const basic_openid_message& m,ostream& s)
82 		: om(m), os(s) { }
83 
operator ()opkele::__om_kv_outputter84 	    result_type operator()(argument_type f) {
85 		os << f << ':' << om.get_field(f) << '\n';
86 	    }
87     };
88 
to_keyvalues(ostream & o) const89     void basic_openid_message::to_keyvalues(ostream& o) const {
90 	for_each(fields_begin(),fields_end(),__om_kv_outputter(*this,o));
91     }
92 
93     struct __om_html_outputter : public unary_function<const string&,void> {
94 	public:
95 	    const basic_openid_message& om;
96 	    ostream& os;
97 	    const char *pfx;
98 
__om_html_outputteropkele::__om_html_outputter99 	    __om_html_outputter(const basic_openid_message& m,ostream& s,const char *p=0)
100 		: om(m), os(s), pfx(p) { }
101 
operator ()opkele::__om_html_outputter102 	    result_type operator()(argument_type f) {
103 		os <<
104 		    "<input type=\"hidden\""
105 		    " name=\"";
106 		if(pfx)
107 		    os << util::attr_escape(pfx);
108 		os << util::attr_escape(f) << "\""
109 		    " value=\"" << util::attr_escape(om.get_field(f)) << "\" />";
110 	    }
111     };
112 
to_htmlhiddens(ostream & o,const char * pfx) const113     void basic_openid_message::to_htmlhiddens(ostream& o,const char* pfx) const {
114 	for_each(fields_begin(),fields_end(),__om_html_outputter(*this,o,pfx));
115     }
116 
add_to_signed(const string & fields)117     void basic_openid_message::add_to_signed(const string& fields) {
118 	string::size_type fnc = fields.find_first_not_of(",");
119 	if(fnc==string::npos)
120 	    throw bad_input(OPKELE_CP_ "Trying to add nothing in particular to the list of signed fields");
121 	string signeds;
122 	try {
123 	    signeds = get_field("signed");
124 	    string::size_type lnc = signeds.find_last_not_of(",");
125 	    if(lnc==string::npos)
126 		signeds.assign(fields,fnc,fields.size()-fnc);
127 	    else{
128 		string::size_type ss = signeds.size();
129 		if(lnc==(ss-1)) {
130 		    signeds+= ',';
131 		    signeds.append(fields,fnc,fields.size()-fnc);
132 		}else{
133 		    if(lnc<(ss-2))
134 			signeds.replace(lnc+2,ss-lnc-2,
135 				fields,fnc,fields.size()-fnc);
136 		    else
137 			signeds.append(fields,fnc,fields.size()-fnc);
138 		}
139 	    }
140 	}catch(failed_lookup&) {
141 	    signeds.assign(fields,fnc,fields.size()-fnc);
142 	}
143 	set_field("signed",signeds);
144     }
145 
find_ns(const string & uri,const char * pfx) const146     string basic_openid_message::find_ns(const string& uri,const char *pfx) const {
147 	try {
148 	    return get_ns(uri);
149 	}catch(failed_lookup&) {
150 	    return pfx;
151 	}
152     }
allocate_ns(const string & uri,const char * pfx)153     string basic_openid_message::allocate_ns(const string& uri,const char *pfx) {
154 	if(!has_field("ns"))
155 	    return pfx;
156 	if(has_ns(uri))
157 	    throw bad_input(OPKELE_CP_ "OpenID message already contains namespace");
158 	string rv = pfx;
159 	if(has_field("ns."+rv)) {
160 	    string::reference c=rv[rv.length()];
161 	    for(c='a';c<='z' && has_field("ns."+rv);++c) ;
162 	    if(c=='z')
163 		throw exception(OPKELE_CP_ "Failed to allocate namespace");
164 	}
165 	set_field("ns."+rv,uri);
166 	return rv;
167     }
168 
has_field(const string & n) const169     bool openid_message_t::has_field(const string& n) const {
170 	return find(n)!=end();
171     }
get_field(const string & n) const172     const string& openid_message_t::get_field(const string& n) const {
173 	const_iterator i=find(n);
174 	if(i==end())
175 	    throw failed_lookup(OPKELE_CP_ n+": no such field");
176 	return i->second;
177     }
178 
fields_begin() const179     openid_message_t::fields_iterator openid_message_t::fields_begin() const {
180 	return util::map_keys_iterator<const_iterator,string,const string&,const string*>(begin(),end());
181     }
fields_end() const182     openid_message_t::fields_iterator openid_message_t::fields_end() const {
183 	return util::map_keys_iterator<const_iterator,string,const string&,const string*>(end(),end());
184     }
185 
reset_fields()186     void openid_message_t::reset_fields() {
187 	clear();
188     }
set_field(const string & n,const string & v)189     void openid_message_t::set_field(const string& n,const string& v) {
190 	(*this)[n]=v;
191     }
reset_field(const string & n)192     void openid_message_t::reset_field(const string& n) {
193 	erase(n);
194     }
195 
196 }
197