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1 /*       +------------------------------------+
2  *       | Inspire Internet Relay Chat Daemon |
3  *       +------------------------------------+
4  *
5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
6  * See: http://www.inspircd.org/wiki/index.php/Credits
7  *
8  * This program is free but copyrighted software; see
9  *            the file COPYING for details.
10  *
11  * ---------------------------------------------------
12  */
13
14 /* $ModDesc: Allows for hashed oper passwords */
15 /* $ModDep: m_hash.h */
16
17 #include "inspircd.h"
18 #include "m_hash.h"
19
20 typedef std::map<irc::string, Module*> hashymodules;
21
22 /* Handle /MKPASSWD
23  */
24 class cmd_mkpasswd : public Command
25 {
26         Module* Sender;
27         hashymodules &hashers;
28         std::deque<std::string> &names;
29  public:
30         cmd_mkpasswd (InspIRCd* Instance, Module* S, hashymodules &h, std::deque<std::string> &n)
31                 : Command(Instance,"MKPASSWD", 'o', 2), Sender(S), hashers(h), names(n)
32         {
33                 this->source = "m_oper_hash.so";
34                 syntax = "<hashtype> <any-text>";
35         }
36
37         void MakeHash(userrec* user, const char* algo, const char* stuff)
38         {
39                 /* Lets see if they gave us an algorithm which has been implemented */
40                 hashymodules::iterator x = hashers.find(algo);
41                 if (x != hashers.end())
42                 {
43                         /* Yup, reset it first (Always ALWAYS do this) */
44                         HashResetRequest(Sender, x->second).Send();
45                         /* Now attempt to generate a hash */
46                         user->WriteServ("NOTICE %s :%s hashed password for %s is %s",user->nick, algo, stuff, HashSumRequest(Sender, x->second, stuff).Send() );
47                 }
48                 else
49                 {
50                         /* I dont do flying, bob. */
51                         user->WriteServ("NOTICE %s :Unknown hash type, valid hash types are: %s", user->nick, irc::stringjoiner(", ", names, 0, names.size() - 1).GetJoined().c_str() );
52                 }
53         }
54
55         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
56         {
57                 MakeHash(user, parameters[0], parameters[1]);
58                 /* NOTE: Don't propagate this across the network!
59                  * We dont want plaintext passes going all over the place...
60                  * To make sure it goes nowhere, return CMD_FAILURE!
61                  */
62                 return CMD_FAILURE;
63         }
64 };
65
66 class ModuleOperHash : public Module
67 {
68         
69         cmd_mkpasswd* mycommand;
70         ConfigReader* Conf;
71         hashymodules hashers; /* List of modules which implement HashRequest */
72         std::deque<std::string> names; /* Module names which implement HashRequest */
73
74  public:
75
76         ModuleOperHash(InspIRCd* Me)
77                 : Module(Me)
78         {
79
80                 /* Read the config file first */
81                 Conf = NULL;
82                 OnRehash(NULL,"");
83
84                 ServerInstance->Modules->UseInterface("HashRequest");
85
86                 /* Find all modules which implement the interface 'HashRequest' */
87                 modulelist* ml = ServerInstance->Modules->FindInterface("HashRequest");
88
89                 /* Did we find any modules? */
90                 if (ml)
91                 {
92                         /* Yes, enumerate them all to find out the hashing algorithm name */
93                         for (modulelist::iterator m = ml->begin(); m != ml->end(); m++)
94                         {
95                                 /* Make a request to it for its name, its implementing
96                                  * HashRequest so we know its safe to do this
97                                  */
98                                 std::string name = HashNameRequest(this, *m).Send();
99                                 /* Build a map of them */
100                                 hashers[name.c_str()] = *m;
101                                 names.push_back(name);
102                         }
103                 }
104                 else
105                 {
106                         throw ModuleException("I can't find any modules loaded which implement the HashRequest interface! You probably forgot to load a hashing module such as m_md5.so or m_sha256.so.");
107                 }
108
109                 mycommand = new cmd_mkpasswd(ServerInstance, this, hashers, names);
110                 ServerInstance->AddCommand(mycommand);
111         }
112         
113         virtual ~ModuleOperHash()
114         {
115                 ServerInstance->Modules->DoneWithInterface("HashRequest");
116         }
117
118         void Implements(char* List)
119         {
120                 List[I_OnRehash] = List[I_OnOperCompare] = 1;
121         }
122
123         virtual void OnRehash(userrec* user, const std::string &parameter)
124         {
125                 /* Re-read configuration file */
126                 if (Conf)
127                         delete Conf;
128
129                 Conf = new ConfigReader(ServerInstance);
130         }
131
132         virtual int OnOperCompare(const std::string &data, const std::string &input, int tagnumber)
133         {
134                 /* First, lets see what hash theyre using on this oper */
135                 std::string hashtype = Conf->ReadValue("oper", "hash", tagnumber);
136                 hashymodules::iterator x = hashers.find(hashtype.c_str());
137
138                 /* Is this a valid hash name? (case insensitive) */
139                 if (x != hashers.end())
140                 {
141                         /* Reset the hashing module */
142                         HashResetRequest(this, x->second).Send();
143                         /* Compare the hash in the config to the generated hash */
144                         if (!strcasecmp(data.c_str(), HashSumRequest(this, x->second, input.c_str()).Send()))
145                                 return 1;
146                         /* No match, and must be hashed, forbid */
147                         else return -1;
148                 }
149
150                 /* Not a hash, fall through to strcmp in core */
151                 return 0;
152         }
153
154         virtual Version GetVersion()
155         {
156                 return Version(1,1,0,1,VF_VENDOR,API_VERSION);
157         }
158 };
159
160 MODULE_INIT(ModuleOperHash)