chat.c

Linux下的多协议即时通讯程序源代码

/*

  silcpurple_chat.c

  Author: Pekka Riikonen <[e-mail]>

  Copyright (C) 2004 Pekka Riikonen

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; version 2 of the License.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

*/

#include "silcincludes.h"
#include "silcclient.h"
#include "silcpurple.h"
#include "wb.h"

/***************************** Channel Routines ******************************/

GList *silcpurple_chat_info(PurpleConnection *gc)
{
	GList *ci = NULL;
	struct proto_chat_entry *pce;

	pce = g_new0(struct proto_chat_entry, 1);
	pce->label = _("_Channel:");
	pce->identifier = "channel";
	pce->required = TRUE;
	ci = g_list_append(ci, pce);

	pce = g_new0(struct proto_chat_entry, 1);
	pce->label = _("_Passphrase:");
	pce->identifier = "passphrase";
	pce->secret = TRUE;
	ci = g_list_append(ci, pce);

	return ci;
}

GHashTable *silcpurple_chat_info_defaults(PurpleConnection *gc, const char *chat_name)
{
	GHashTable *defaults;

	defaults = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_free);

	if (chat_name != NULL)
		g_hash_table_insert(defaults, "channel", g_strdup(chat_name));

	return defaults;
}

static void
silcpurple_chat_getinfo(PurpleConnection *gc, GHashTable *components);

static void
silcpurple_chat_getinfo_res(SilcClient client,
			  SilcClientConnection conn,
			  SilcChannelEntry *channels,
			  SilcUInt32 channels_count,
			  void *context)
{
	GHashTable *components = context;
	PurpleConnection *gc = client->application;
	const char *chname;
	char tmp[256];

	chname = g_hash_table_lookup(components, "channel");
	if (!chname)
		return;

	if (!channels) {
		g_snprintf(tmp, sizeof(tmp),
			   _("Channel %s does not exist in the network"), chname);
		purple_notify_error(gc, _("Channel Information"),
				  _("Cannot get channel information"), tmp);
		return;
	}

	silcpurple_chat_getinfo(gc, components);
}


static void
silcpurple_chat_getinfo(PurpleConnection *gc, GHashTable *components)
{
	SilcPurple sg = gc->proto_data;
	const char *chname;
	char *buf, tmp[256], *tmp2;
	GString *s;
	SilcChannelEntry channel;
	SilcHashTableList htl;
	SilcChannelUser chu;

	if (!components)
		return;

	chname = g_hash_table_lookup(components, "channel");
	if (!chname)
		return;
	channel = silc_client_get_channel(sg->client, sg->conn,
					  (char *)chname);
	if (!channel) {
		silc_client_get_channel_resolve(sg->client, sg->conn,
						(char *)chname,
						silcpurple_chat_getinfo_res,
						components);
		return;
	}

	s = g_string_new("");
	tmp2 = g_markup_escape_text(channel->channel_name, -1);
	g_string_append_printf(s, _("<b>Channel Name:</b> %s"), tmp2);
	g_free(tmp2);
	if (channel->user_list && silc_hash_table_count(channel->user_list))
		g_string_append_printf(s, _("<br><b>User Count:</b> %d"),
				       (int)silc_hash_table_count(channel->user_list));

	silc_hash_table_list(channel->user_list, &htl);
	while (silc_hash_table_get(&htl, NULL, (void *)&chu)) {
		if (chu->mode & SILC_CHANNEL_UMODE_CHANFO) {
			tmp2 = g_markup_escape_text(chu->client->nickname, -1);
			g_string_append_printf(s, _("<br><b>Channel Founder:</b> %s"),
					       tmp2);
			g_free(tmp2);
			break;
		}
	}
	silc_hash_table_list_reset(&htl);

	if (channel->channel_key)
		g_string_append_printf(s, _("<br><b>Channel Cipher:</b> %s"),
				       silc_cipher_get_name(channel->channel_key));
	if (channel->hmac)
		/* Definition of HMAC: http://en.wikipedia.org/wiki/HMAC */
		g_string_append_printf(s, _("<br><b>Channel HMAC:</b> %s"),
				       silc_hmac_get_name(channel->hmac));

	if (channel->topic) {
		tmp2 = g_markup_escape_text(channel->topic, -1);
		g_string_append_printf(s, _("<br><b>Channel Topic:</b><br>%s"), tmp2);
		g_free(tmp2);
	}

	if (channel->mode) {
		g_string_append_printf(s, _("<br><b>Channel Modes:</b> "));
		silcpurple_get_chmode_string(channel->mode, tmp, sizeof(tmp));
		g_string_append(s, tmp);
	}

	if (channel->founder_key) {
		char *fingerprint, *babbleprint;
		unsigned char *pk;
		SilcUInt32 pk_len;
		pk = silc_pkcs_public_key_encode(channel->founder_key, &pk_len);
		fingerprint = silc_hash_fingerprint(NULL, pk, pk_len);
		babbleprint = silc_hash_babbleprint(NULL, pk, pk_len);

		g_string_append_printf(s, _("<br><b>Founder Key Fingerprint:</b><br>%s"), fingerprint);
		g_string_append_printf(s, _("<br><b>Founder Key Babbleprint:</b><br>%s"), babbleprint);

		silc_free(fingerprint);
		silc_free(babbleprint);
		silc_free(pk);
	}

	buf = g_string_free(s, FALSE);
	purple_notify_formatted(gc, NULL, _("Channel Information"), NULL, buf, NULL, NULL);
	g_free(buf);
}


static void
silcpurple_chat_getinfo_menu(PurpleBlistNode *node, gpointer data)
{
	PurpleChat *chat = (PurpleChat *)node;
	silcpurple_chat_getinfo(chat->account->gc, chat->components);
}


#if 0   /* XXX For now these are not implemented.  We need better
	   listview dialog from Purple for these. */
/************************** Channel Invite List ******************************/

static void
silcpurple_chat_invitelist(PurpleBlistNode *node, gpointer data);
{

}


/**************************** Channel Ban List *******************************/

static void
silcpurple_chat_banlist(PurpleBlistNode *node, gpointer data);
{

}
#endif


/************************* Channel Authentication ****************************/

typedef struct {
	SilcPurple sg;
	SilcChannelEntry channel;
	PurpleChat *c;
	SilcBuffer pubkeys;
} *SilcPurpleChauth;

static void
silcpurple_chat_chpk_add(void *user_data, const char *name)
{
	SilcPurpleChauth sgc = (SilcPurpleChauth)user_data;
	SilcPurple sg = sgc->sg;
	SilcClient client = sg->client;
	SilcClientConnection conn = sg->conn;
	SilcPublicKey public_key;
	SilcBuffer chpks, pk, chidp;
	unsigned char mode[4];
	SilcUInt32 m;

	/* Load the public key */
	if (!silc_pkcs_load_public_key(name, &public_key, SILC_PKCS_FILE_PEM) &&
	    !silc_pkcs_load_public_key(name, &public_key, SILC_PKCS_FILE_BIN)) {
		silcpurple_chat_chauth_show(sgc->sg, sgc->channel, sgc->pubkeys);
		silc_buffer_free(sgc->pubkeys);
		silc_free(sgc);
		purple_notify_error(client->application,
				  _("Add Channel Public Key"),
				  _("Could not load public key"), NULL);
		return;
	}

	pk = silc_pkcs_public_key_payload_encode(public_key);
	chpks = silc_buffer_alloc_size(2);
	SILC_PUT16_MSB(1, chpks->head);
	chpks = silc_argument_payload_encode_one(chpks, pk->data,
						 pk->len, 0x00);
	silc_buffer_free(pk);

	m = sgc->channel->mode;
	m |= SILC_CHANNEL_MODE_CHANNEL_AUTH;

	/* Send CMODE */
	SILC_PUT32_MSB(m, mode);
	chidp = silc_id_payload_encode(sgc->channel->id, SILC_ID_CHANNEL);
	silc_client_command_send(client, conn, SILC_COMMAND_CMODE,
				 ++conn->cmd_ident, 3,
				 1, chidp->data, chidp->len,
				 2, mode, sizeof(mode),
				 9, chpks->data, chpks->len);
	silc_buffer_free(chpks);
	silc_buffer_free(chidp);
	silc_buffer_free(sgc->pubkeys);
	silc_free(sgc);
}

static void
silcpurple_chat_chpk_cancel(void *user_data, const char *name)
{
	SilcPurpleChauth sgc = (SilcPurpleChauth)user_data;
	silcpurple_chat_chauth_show(sgc->sg, sgc->channel, sgc->pubkeys);
	silc_buffer_free(sgc->pubkeys);
	silc_free(sgc);
}

static void
silcpurple_chat_chpk_cb(SilcPurpleChauth sgc, PurpleRequestFields *fields)
{
	SilcPurple sg = sgc->sg;
	SilcClient client = sg->client;
	SilcClientConnection conn = sg->conn;
	PurpleRequestField *f;
	const GList *list;
	SilcPublicKey public_key;
	SilcBuffer chpks, pk, chidp;
	SilcUInt16 c = 0, ct;
	unsigned char mode[4];
	SilcUInt32 m;

	f = purple_request_fields_get_field(fields, "list");
	if (!purple_request_field_list_get_selected(f)) {
		/* Add new public key */
		purple_request_file(sg->gc, _("Open Public Key..."), NULL, FALSE,
				  G_CALLBACK(silcpurple_chat_chpk_add),
				  G_CALLBACK(silcpurple_chat_chpk_cancel),
				  purple_connection_get_account(sg->gc), NULL, NULL, sgc);
		return;
	}

	list = purple_request_field_list_get_items(f);
	chpks = silc_buffer_alloc_size(2);

	for (ct = 0; list; list = list->next, ct++) {
		public_key = purple_request_field_list_get_data(f, list->data);
		if (purple_request_field_list_is_selected(f, list->data)) {
			/* Delete this public key */
			pk = silc_pkcs_public_key_payload_encode(public_key);
			chpks = silc_argument_payload_encode_one(chpks, pk->data,
								 pk->len, 0x01);
			silc_buffer_free(pk);
			c++;
		}
		silc_pkcs_public_key_free(public_key);
	}
	if (!c) {
		silc_buffer_free(chpks);
		return;
	}
	SILC_PUT16_MSB(c, chpks->head);

	m = sgc->channel->mode;
	if (ct == c)
		m &= ~SILC_CHANNEL_MODE_CHANNEL_AUTH;

	/* Send CMODE */
	SILC_PUT32_MSB(m, mode);
	chidp = silc_id_payload_encode(sgc->channel->id, SILC_ID_CHANNEL);
	silc_client_command_send(client, conn, SILC_COMMAND_CMODE,
				 ++conn->cmd_ident, 3,
				 1, chidp->data, chidp->len,
				 2, mode, sizeof(mode),
				 9, chpks->data, chpks->len);
	silc_buffer_free(chpks);
	silc_buffer_free(chidp);
	silc_buffer_free(sgc->pubkeys);
	silc_free(sgc);
}

static void
silcpurple_chat_chauth_ok(SilcPurpleChauth sgc, PurpleRequestFields *fields)
{
	SilcPurple sg = sgc->sg;
	PurpleRequestField *f;
	const char *curpass, *val;
	int set;

	f = purple_request_fields_get_field(fields, "passphrase");
	val = purple_request_field_string_get_value(f);
	curpass = purple_blist_node_get_string((PurpleBlistNode *)sgc->c, "passphrase");

	if (!val && curpass)
		set = 0;
	else if (val && !curpass)
		set = 1;
	else if (val && curpass && strcmp(val, curpass))
		set = 1;
	else
		set = -1;

	if (set == 1) {
		silc_client_command_call(sg->client, sg->conn, NULL, "CMODE",
					 sgc->channel->channel_name, "+a", val, NULL);
		purple_blist_node_set_string((PurpleBlistNode *)sgc->c, "passphrase", val);
	} else if (set == 0) {
		silc_client_command_call(sg->client, sg->conn, NULL, "CMODE",
					 sgc->channel->channel_name, "-a", NULL);
		purple_blist_node_remove_setting((PurpleBlistNode *)sgc->c, "passphrase");
	}

	silc_buffer_free(sgc->pubkeys);
	silc_free(sgc);
}

void silcpurple_chat_chauth_show(SilcPurple sg, SilcChannelEntry channel,
			       SilcBuffer channel_pubkeys)
{
	SilcUInt16 argc;
	SilcArgumentPayload chpks;
	unsigned char *pk;
	SilcUInt32 pk_len, type;
	char *fingerprint, *babbleprint;
	SilcPublicKey pubkey;
	SilcPublicKeyIdentifier ident;
	char tmp2[1024], t[512];
	PurpleRequestFields *fields;
	PurpleRequestFieldGroup *g;
	PurpleRequestField *f;
	SilcPurpleChauth sgc;
	const char *curpass = NULL;

	sgc = silc_calloc(1, sizeof(*sgc));
	if (!sgc)
		return;
	sgc->sg = sg;
	sgc->channel = channel;

	fields = purple_request_fields_new();

	if (sgc->c)
	  curpass = purple_blist_node_get_string((PurpleBlistNode *)sgc->c, "passphrase");

	g = purple_request_field_group_new(NULL);
	f = purple_request_field_string_new("passphrase", _("Channel Passphrase"),
					  curpass, FALSE);
	purple_request_field_string_set_masked(f, TRUE);
	purple_request_field_group_add_field(g, f);
	purple_request_fields_add_group(fields, g);

	g = purple_request_field_group_new(NULL);
	f = purple_request_field_label_new("l1", _("Channel Public Keys List"));
	purple_request_field_group_add_field(g, f);
	purple_request_fields_add_group(fields, g);

	g_snprintf(t, sizeof(t),
		   _("Channel authentication is used to secure the channel from "
		     "unauthorized access. The authentication may be based on "
		     "passphrase and digital signatures. If passphrase is set, it "
		     "is required to be able to join. If channel public keys are set "
		     "then only users whose public keys are listed are able to join."));

	if (!channel_pubkeys) {
		f = purple_request_field_list_new("list", NULL);
		purple_request_field_group_add_field(g, f);
		purple_request_fields(sg->gc, _("Channel Authentication"),
				    _("Channel Authentication"), t, fields,
				    _("Add / Remove"), G_CALLBACK(silcpurple_chat_chpk_cb),
				    _("OK"), G_CALLBACK(silcpurple_chat_chauth_ok),
					purple_connection_get_account(sg->gc), NULL, NULL, sgc);
		return;
	}
	sgc->pubkeys = silc_buffer_copy(channel_pubkeys);

	g = purple_request_field_group_new(NULL);
	f = purple_request_field_list_new("list", NULL);
	purple_request_field_group_add_field(g, f);
	purple_request_fields_add_group(fields, g);

	SILC_GET16_MSB(argc, channel_pubkeys->data);
	chpks = silc_argument_payload_parse(channel_pubkeys->data + 2,
					    channel_pubkeys->len - 2, argc);
	if (!chpks)
		return;

	pk = silc_argument_get_first_arg(chpks, &type, &pk_len);
	while (pk) {
		fingerprint = silc_hash_fingerprint(NULL, pk + 4, pk_len - 4);
		babbleprint = silc_hash_babbleprint(NULL, pk + 4, pk_len - 4);
		silc_pkcs_public_key_payload_decode(pk, pk_len, &pubkey);
		ident = silc_pkcs_decode_identifier(pubkey->identifier);

		g_snprintf(tmp2, sizeof(tmp2), "%s\n  %s\n  %s",
			   ident->realname ? ident->realname : ident->username ?
			   ident->username : "", fingerprint, babbleprint);
		purple_request_field_list_add(f, tmp2, pubkey);

		silc_free(fingerprint);
		silc_free(babbleprint);
		silc_pkcs_free_identifier(ident);
		pk = silc_argument_get_next_arg(chpks, &type, &pk_len);
	}

	purple_request_field_list_set_multi_select(f, FALSE);
	purple_request_fields(sg->gc, _("Channel Authentication"),
			    _("Channel Authentication"), t, fields,
			    _("Add / Remove"), G_CALLBACK(silcpurple_chat_chpk_cb),
			    _("OK"), G_CALLBACK(silcpurple_chat_chauth_ok),
				purple_connection_get_account(sg->gc), NULL, NULL, sgc);

	silc_argument_payload_free(chpks);
}

static void
silcpurple_chat_chauth(PurpleBlistNode *node, gpointer data)
{
	PurpleChat *chat;
	PurpleConnection *gc;
	SilcPurple sg;

	g_return_if_fail(PURPLE_BLIST_NODE_IS_CHAT(node));

	chat = (PurpleChat *) node;
	gc = purple_account_get_connection(chat->account);
	sg = gc->proto_data;

	silc_client_command_call(sg->client, sg->conn, NULL, "CMODE",
				 g_hash_table_lookup(chat->components, "channel"),
				 "+C", NULL);
}