Module: ngircd.git Branch: master Commit: c5000694d16da0a205e7dde49681d589d552d144 URL: http://ngircd.barton.de/cgi-bin/gitweb.cgi?p=ngircd.git&a=commit;h=c5000694d... Author: Alexander Barton <alex@barton.de> Date: Thu Jan 1 22:26:13 2009 +0100 Support individual channel keys for pre-defined channels. This patch introduces the new configuration variable "KeyFile" for [Channel] sections in ngircd.conf. Here a file can be configured for each pre-defined channel which contains individual channel keys for different users. This file is line-based and must have the following syntax: <user>:<nick>:<key> <user> and <nick> can contain the wildcard character "*". Please not that these channel keys are only in effect, when the channel has a regular key set using channel mode "k"! --- doc/sample-ngircd.conf | 4 ++ man/ngircd.conf.5.tmpl | 45 +++++++++++++++++++++++- src/ngircd/channel.c | 88 +++++++++++++++++++++++++++++++++++++++++++-- src/ngircd/channel.h | 4 ++ src/ngircd/conf.c | 10 +++++- src/ngircd/conf.h | 1 + src/ngircd/irc-channel.c | 7 ++-- 7 files changed, 149 insertions(+), 10 deletions(-) diff --git a/doc/sample-ngircd.conf b/doc/sample-ngircd.conf index 526e880..0d0061b 100644 --- a/doc/sample-ngircd.conf +++ b/doc/sample-ngircd.conf @@ -245,6 +245,10 @@ # initial channel password (mode k) ;Key = Secret + # Key file, syntax for each line: "<user>:<nick>:<key>". + # Default: none. + ;KeyFile = /etc/ngircd/#chan.key + # maximum users per channel (mode l) ;MaxUsers = 23 diff --git a/man/ngircd.conf.5.tmpl b/man/ngircd.conf.5.tmpl index b8aa7bd..df15b77 100644 --- a/man/ngircd.conf.5.tmpl +++ b/man/ngircd.conf.5.tmpl @@ -319,7 +319,50 @@ Topic for this channel. Initial channel modes. .TP \fBKey\fR -Sets initial channel key (only relevant if mode k is set). +Sets initial channel key (only relevant if channel mode "k" is set). +.TP +\fBKeyFile\fR +Path and file name of a "key file" containing individual channel keys for +different users. The file consists of plain text lines with the following +syntax (without spaces!): +.PP +.RS +.RS +.I user +: +.I nick +: +.I key +.RE +.PP +.I user +and +.I nick +can contain the wildcard character "*". +.br +.I key +is an arbitrary password. +.PP +Valid examples are: +.PP +.RS +*:*:KeY +.br +*:nick:123 +.br +~user:*:xyz +.RE +.PP +The key file is read on each JOIN command when this channel has a key +(channel mode +k). Access is granted, if a) the channel key set using the +MODE +k command or b) one of the lines in the key file match. +.PP +.B Please note: +.br +The file is not reopened on each access, so you can modify and overwrite it +without problems, but moving or deleting the file will have not effect until +the daemon re-reads its configuration! +.RE .TP \fBMaxUsers\fR Set maximum user limit for this channel (only relevant if channel mode "l" diff --git a/src/ngircd/channel.c b/src/ngircd/channel.c index 46e42ac..6d23b24 100644 --- a/src/ngircd/channel.c +++ b/src/ngircd/channel.c @@ -22,6 +22,7 @@ #include <stdlib.h> #include <string.h> #include <errno.h> +#include <stdio.h> #include <strings.h> #include "defines.h" @@ -39,6 +40,7 @@ #include "lists.h" #include "log.h" #include "messages.h" +#include "match.h" #include "exp.h" @@ -59,6 +61,9 @@ static CL2CHAN *Get_First_Cl2Chan PARAMS(( CLIENT *Client, CHANNEL *Chan )); static CL2CHAN *Get_Next_Cl2Chan PARAMS(( CL2CHAN *Start, CLIENT *Client, CHANNEL *Chan )); static void Delete_Channel PARAMS(( CHANNEL *Chan )); static void Free_Channel PARAMS(( CHANNEL *Chan )); +static void Update_Predefined PARAMS((CHANNEL *Chan, + const struct Conf_Channel *Conf_Chan)); +static void Set_Key_File PARAMS((CHANNEL *Chan, FILE *KeyFile)); GLOBAL void @@ -116,8 +121,10 @@ Channel_InitPredefined( void ) new_chan = Channel_Search(conf_chan->name); if (new_chan) { - Log(LOG_INFO, "Can't create pre-defined channel \"%s\": name already in use.", - conf_chan->name); + Log(LOG_INFO, + "Can't create pre-defined channel \"%s\": name already in use.", + conf_chan->name); + Update_Predefined(new_chan, conf_chan); continue; } @@ -127,6 +134,8 @@ Channel_InitPredefined( void ) conf_chan->name); continue; } + Log(LOG_INFO, "Created pre-defined channel \"%s\"", + conf_chan->name); Channel_ModeAdd(new_chan, 'P'); @@ -139,8 +148,7 @@ Channel_InitPredefined( void ) Channel_SetKey(new_chan, conf_chan->key); Channel_SetMaxUsers(new_chan, conf_chan->maxusers); - Log(LOG_INFO, "Created pre-defined channel \"%s\"", - conf_chan->name); + Update_Predefined(new_chan, conf_chan); } if (channel_count) array_free(&Conf_Channels); @@ -153,6 +161,8 @@ Free_Channel(CHANNEL *chan) array_free(&chan->topic); Lists_Free(&chan->list_bans); Lists_Free(&chan->list_invites); + if (Chan->keyfile) + fclose(Chan->keyfile); free(chan); } @@ -1051,6 +1061,44 @@ Channel_LogServer(char *msg) } /* Channel_LogServer */ +GLOBAL bool +Channel_CheckKey(CHANNEL *Chan, CLIENT *Client, const char *Key) +{ + char line[COMMAND_LEN], *nick, *pass; + + assert(Chan != NULL); + assert(Client != NULL); + assert(Key != NULL); + + if (!strchr(Chan->modes, 'k')) + return true; + if (strcmp(Chan->key, Key) == 0) + return true; + if (!Chan->keyfile) + return false; + + Chan->keyfile = freopen(NULL, "r", Chan->keyfile); + while (fgets(line, sizeof(line), Chan->keyfile) != NULL) { + ngt_TrimStr(line); + if (! (nick = strchr(line, ':'))) + continue; + *nick++ = '\0'; + if (!Match(line, Client_User(Client))) + continue; + if (! (pass = strchr(nick, ':'))) + continue; + *pass++ = '\0'; + if (!Match(nick, Client_ID(Client))) + continue; + if (strcmp(Key, pass) != 0) + continue; + + return true; + } + return false; +} /* Channel_CheckKey */ + + static CL2CHAN * Get_First_Cl2Chan( CLIENT *Client, CHANNEL *Chan ) { @@ -1108,4 +1156,36 @@ Delete_Channel(CHANNEL *Chan) } /* Delete_Channel */ +static void +Update_Predefined(CHANNEL *Chan, const struct Conf_Channel *Conf_Chan) +{ + FILE *fd; + + if (! Conf_Chan->keyfile || ! *Conf_Chan->keyfile) + return; + + fd = fopen(Conf_Chan->keyfile, "r"); + if (! fd) + Log(LOG_ERR, + "Can't open channel key file for \"%s\", \"%s\": %s", + Conf_Chan->name, Conf_Chan->keyfile, + strerror(errno)); + else + Set_Key_File(Chan, fd); +} /* Update_Predefined */ + + +static void +Set_Key_File(CHANNEL *Chan, FILE *KeyFile) +{ + assert(Chan != NULL); + + if (Chan->keyfile) + fclose(Chan->keyfile); + Chan->keyfile = KeyFile; + Log(LOG_INFO|LOG_snotice, + "New local channel key file for \"%s\" activated.", Chan->name); +} /* Set_Key_File */ + + /* -eof- */ diff --git a/src/ngircd/channel.h b/src/ngircd/channel.h index 56b1240..3aa1853 100644 --- a/src/ngircd/channel.h +++ b/src/ngircd/channel.h @@ -37,6 +37,7 @@ typedef struct _CHANNEL unsigned long maxusers; /* Maximum number of members (mode "l") */ struct list_head list_bans; /* list head of banned users */ struct list_head list_invites; /* list head of invited users */ + FILE *keyfile; /* handle of the channel key file */ } CHANNEL; typedef struct _CLIENT2CHAN @@ -127,6 +128,9 @@ GLOBAL bool Channel_ShowInvites PARAMS((CLIENT *client, CHANNEL *c)); GLOBAL void Channel_LogServer PARAMS((char *msg)); +GLOBAL bool Channel_CheckKey PARAMS((CHANNEL *Chan, CLIENT *Client, + const char *Key)); + #define Channel_IsLocal(c) (Channel_Name(c)[0] == '&') diff --git a/src/ngircd/conf.c b/src/ngircd/conf.c index fc12cd9..4a8b628 100644 --- a/src/ngircd/conf.c +++ b/src/ngircd/conf.c @@ -313,7 +313,8 @@ Conf_Test( void ) printf(" Modes = %s\n", predef_chan->modes); printf(" Key = %s\n", predef_chan->key); printf(" MaxUsers = %lu\n", predef_chan->maxusers); - printf(" Topic = %s\n\n", predef_chan->topic); + printf(" Topic = %s\n", predef_chan->topic); + printf(" KeyFile = %s\n\n", predef_chan->keyfile); } return (config_valid ? 0 : 1); @@ -1232,6 +1233,13 @@ Handle_CHANNEL(int Line, char *Var, char *Arg) Config_Error_NaN(Line, Var); return; } + if (strcasecmp(Var, "KeyFile") == 0) { + /* channel keys */ + len = strlcpy(chan->keyfile, Arg, sizeof(chan->keyfile)); + if (len >= sizeof(chan->keyfile)) + Config_Error_TooLong(Line, Var); + return; + } Config_Error( LOG_ERR, "%s, line %d (section \"Channel\"): Unknown variable \"%s\"!", NGIRCd_ConfFile, Line, Var ); diff --git a/src/ngircd/conf.h b/src/ngircd/conf.h index cd9cb95..4695b25 100644 --- a/src/ngircd/conf.h +++ b/src/ngircd/conf.h @@ -72,6 +72,7 @@ struct Conf_Channel { char modes[CHANNEL_MODE_LEN]; /* Initial channel modes */ char key[CLIENT_PASS_LEN]; /* Channel key ("password", mode "k" ) */ char topic[COMMAND_LEN]; /* Initial topic */ + char keyfile[512]; /* Path and name of channel key file */ unsigned long maxusers; /* maximum usercount for this channel, mode "l" */ }; diff --git a/src/ngircd/irc-channel.c b/src/ngircd/irc-channel.c index 27414d3..6c478c8 100644 --- a/src/ngircd/irc-channel.c +++ b/src/ngircd/irc-channel.c @@ -89,10 +89,9 @@ join_allowed(CLIENT *Client, CLIENT *target, CHANNEL *chan, } /* Is the channel protected by a key? */ - if (strchr(channel_modes, 'k') && - strcmp(Channel_Key(chan), key ? key : "")) - { - IRC_WriteStrClient(Client, ERR_BADCHANNELKEY_MSG, Client_ID(Client), channame); + if (!Channel_CheckKey(chan, target, key ? key : "")) { + IRC_WriteStrClient(Client, ERR_BADCHANNELKEY_MSG, + Client_ID(Client), channame); return false; } /* Are there already too many members? */