diff options
Diffstat (limited to 'plugins/fishlim/plugin_hexchat.c')
| -rw-r--r-- | plugins/fishlim/plugin_hexchat.c | 192 |
1 files changed, 176 insertions, 16 deletions
diff --git a/plugins/fishlim/plugin_hexchat.c b/plugins/fishlim/plugin_hexchat.c index 0afecd82..a163fd10 100644 --- a/plugins/fishlim/plugin_hexchat.c +++ b/plugins/fishlim/plugin_hexchat.c @@ -32,6 +32,7 @@ #define HEXCHAT_MAX_WORDS 32 #include "fish.h" +#include "dh1080.h" #include "keystore.h" #include "irc.h" @@ -41,8 +42,11 @@ static const char plugin_version[] = "0.0.17"; static const char usage_setkey[] = "Usage: SETKEY [<nick or #channel>] <password>, sets the key for a channel or nick"; static const char usage_delkey[] = "Usage: DELKEY <nick or #channel>, deletes the key for a channel or nick"; +static const char usage_keyx[] = "Usage: KEYX [<nick>], performs DH1080 key-exchange with <nick>"; + static hexchat_plugin *ph; +static GHashTable *pending_exchanges; /** @@ -58,6 +62,38 @@ gchar *get_config_filename(void) { return filename_fs; } +static inline gboolean irc_is_query (const char *name) { + const char *chantypes = hexchat_list_str (ph, NULL, "chantypes"); + + return strchr (chantypes, name[0]) == NULL; +} + +static hexchat_context *find_context_on_network (const char *name) { + hexchat_list *channels; + hexchat_context *ret = NULL; + int id; + + if (hexchat_get_prefs(ph, "id", NULL, &id) != 2) + return NULL; + + channels = hexchat_list_get(ph, "channels"); + if (!channels) + return NULL; + + while (hexchat_list_next(ph, channels)) { + int chan_id = hexchat_list_int(ph, channels, "id"); + const char *chan_name = hexchat_list_str(ph, channels, "channel"); + + if (chan_id == id && chan_name && hexchat_nickcmp (ph, chan_name, name) == 0) { + ret = (hexchat_context*)hexchat_list_str(ph, channels, "context"); + break; + } + }; + + hexchat_list_free(ph, channels); + return ret; +} + int irc_nick_cmp(const char *a, const char *b) { return hexchat_nickcmp (ph, a, b); } @@ -163,11 +199,11 @@ static int handle_incoming(char *word[], char *word_eol[], hexchat_event_attrs * /* Prefix with colon, which gets stripped out otherwise */ g_string_append_c (message, ':'); } - + if (prefix_char) { g_string_append_c (message, prefix_char); } - + } else { /* Add unencrypted data (for example, a prefix from a bouncer or bot) */ peice = word[uw]; @@ -176,7 +212,7 @@ static int handle_incoming(char *word[], char *word_eol[], hexchat_event_attrs * g_string_append (message, peice); } g_free(decrypted); - + /* Simulate unencrypted message */ /* hexchat_printf(ph, "simulating: %s\n", message->str); */ hexchat_command(ph, message->str); @@ -184,26 +220,103 @@ static int handle_incoming(char *word[], char *word_eol[], hexchat_event_attrs * g_string_free (message, TRUE); g_free(sender_nick); return HEXCHAT_EAT_HEXCHAT; - + decrypt_error: g_free(decrypted); g_free(sender_nick); return HEXCHAT_EAT_NONE; } +static int handle_keyx_notice(char *word[], char *word_eol[], void *userdata) { + const char *dh_message = word[4]; + const char *dh_pubkey = word[5]; + hexchat_context *query_ctx; + const char *prefix; + gboolean cbc; + char *sender, *secret_key, *priv_key = NULL; + + if (!*dh_message || !*dh_pubkey || strlen(dh_pubkey) != 181) + return HEXCHAT_EAT_NONE; + + if (!irc_parse_message((const char**)word, &prefix, NULL, NULL) || !prefix) + return HEXCHAT_EAT_NONE; + + sender = irc_prefix_get_nick(prefix); + query_ctx = find_context_on_network(sender); + if (query_ctx) + hexchat_set_context(ph, query_ctx); + + dh_message++; /* : prefix */ + if (*dh_message == '+' || *dh_message == '-') + dh_message++; /* identify-msg */ + + cbc = g_strcmp0 (word[6], "CBC") == 0; + + if (!strcmp(dh_message, "DH1080_INIT")) { + char *pub_key; + + if (cbc) { + hexchat_print(ph, "Recieved key exchange for CBC mode which is not supported."); + goto cleanup; + } + + hexchat_printf(ph, "Received public key from %s, sending mine...", sender); + if (dh1080_generate_key(&priv_key, &pub_key)) { + hexchat_commandf(ph, "quote NOTICE %s :DH1080_FINISH %s", sender, pub_key); + g_free(pub_key); + } else { + hexchat_print(ph, "Failed to generate keys"); + goto cleanup; + } + } else if (!strcmp (dh_message, "DH1080_FINISH")) { + char *sender_lower = g_ascii_strdown(sender, -1); + /* FIXME: Properly respect irc casing */ + priv_key = g_hash_table_lookup(pending_exchanges, sender_lower); + g_hash_table_steal(pending_exchanges, sender_lower); + g_free(sender_lower); + + if (cbc) { + hexchat_print(ph, "Recieved key exchange for CBC mode which is not supported."); + goto cleanup; + } + + if (!priv_key) { + hexchat_printf(ph, "Recieved a key exchange response for unknown user: %s", sender); + goto cleanup; + } + } else { + /* Regular notice */ + g_free(sender); + return HEXCHAT_EAT_NONE; + } + + if (dh1080_compute_key(priv_key, dh_pubkey, &secret_key)) { + keystore_store_key(sender, secret_key); + hexchat_printf(ph, "Stored new key for %s", sender); + g_free(secret_key); + } else { + hexchat_print(ph, "Failed to create secret key!"); + } + +cleanup: + g_free(sender); + g_free(priv_key); + return HEXCHAT_EAT_ALL; +} + /** * Command handler for /setkey */ static int handle_setkey(char *word[], char *word_eol[], void *userdata) { const char *nick; const char *key; - + /* Check syntax */ if (*word[2] == '\0') { hexchat_printf(ph, "%s\n", usage_setkey); return HEXCHAT_EAT_HEXCHAT; } - + if (*word[3] == '\0') { /* /setkey password */ nick = hexchat_get_info(ph, "channel"); @@ -213,14 +326,14 @@ static int handle_setkey(char *word[], char *word_eol[], void *userdata) { nick = word[2]; key = word_eol[3]; } - + /* Set password */ if (keystore_store_key(nick, key)) { hexchat_printf(ph, "Stored key for %s\n", nick); } else { hexchat_printf(ph, "\00305Failed to store key in addon_fishlim.conf\n"); } - + return HEXCHAT_EAT_HEXCHAT; } @@ -229,25 +342,62 @@ static int handle_setkey(char *word[], char *word_eol[], void *userdata) { */ static int handle_delkey(char *word[], char *word_eol[], void *userdata) { const char *nick; - + /* Check syntax */ if (*word[2] == '\0' || *word[3] != '\0') { hexchat_printf(ph, "%s\n", usage_delkey); return HEXCHAT_EAT_HEXCHAT; } - + nick = g_strstrip (word_eol[2]); - + /* Delete the given nick from the key store */ if (keystore_delete_nick(nick)) { hexchat_printf(ph, "Deleted key for %s\n", nick); } else { hexchat_printf(ph, "\00305Failed to delete key in addon_fishlim.conf!\n"); } - + return HEXCHAT_EAT_HEXCHAT; } +static int handle_keyx(char *word[], char *word_eol[], void *userdata) { + const char *target = word[2]; + hexchat_context *query_ctx = NULL; + char *pub_key, *priv_key; + int ctx_type; + + if (*target) + query_ctx = find_context_on_network(target); + else { + target = hexchat_get_info(ph, "channel"); + query_ctx = hexchat_get_context (ph); + } + + if (query_ctx) { + hexchat_set_context(ph, query_ctx); + ctx_type = hexchat_list_int(ph, NULL, "type"); + } + + if ((query_ctx && ctx_type != 3) || (!query_ctx && !irc_is_query(target))) { + hexchat_print(ph, "You can only exchange keys with individuals"); + return HEXCHAT_EAT_ALL; + } + + if (dh1080_generate_key(&priv_key, &pub_key)) { + g_hash_table_replace (pending_exchanges, g_ascii_strdown(target, -1), priv_key); + + hexchat_commandf(ph, "quote NOTICE %s :DH1080_INIT %s", target, pub_key); + hexchat_printf(ph, "Sent public key to %s, waiting for reply...", target); + + g_free(pub_key); + } else { + hexchat_print(ph, "Failed to generate keys"); + } + + return HEXCHAT_EAT_ALL; +} + /** * Returns the plugin name version information. */ @@ -267,30 +417,40 @@ int hexchat_plugin_init(hexchat_plugin *plugin_handle, const char **version, char *arg) { ph = plugin_handle; - + /* Send our info to HexChat */ *name = plugin_name; *desc = plugin_desc; *version = plugin_version; - + /* Register commands */ hexchat_hook_command(ph, "SETKEY", HEXCHAT_PRI_NORM, handle_setkey, usage_setkey, NULL); hexchat_hook_command(ph, "DELKEY", HEXCHAT_PRI_NORM, handle_delkey, usage_delkey, NULL); - + hexchat_hook_command(ph, "KEYX", HEXCHAT_PRI_NORM, handle_keyx, usage_keyx, NULL); + /* Add handlers */ hexchat_hook_command(ph, "", HEXCHAT_PRI_NORM, handle_outgoing, NULL, NULL); + hexchat_hook_server(ph, "NOTICE", HEXCHAT_PRI_HIGHEST, handle_keyx_notice, NULL); hexchat_hook_server_attrs(ph, "NOTICE", HEXCHAT_PRI_NORM, handle_incoming, NULL); hexchat_hook_server_attrs(ph, "PRIVMSG", HEXCHAT_PRI_NORM, handle_incoming, NULL); /* hexchat_hook_server(ph, "RAW LINE", HEXCHAT_PRI_NORM, handle_debug, NULL); */ hexchat_hook_server_attrs(ph, "TOPIC", HEXCHAT_PRI_NORM, handle_incoming, NULL); hexchat_hook_server_attrs(ph, "332", HEXCHAT_PRI_NORM, handle_incoming, NULL); - + + if (!dh1080_init()) + return 0; + + pending_exchanges = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free); + hexchat_printf(ph, "%s plugin loaded\n", plugin_name); /* Return success */ return 1; } int hexchat_plugin_deinit(void) { + g_clear_pointer(&pending_exchanges, g_hash_table_destroy); + dh1080_deinit(); + hexchat_printf(ph, "%s plugin unloaded\n", plugin_name); return 1; } |