/* This file includes the private message sending and receiving routines
and private message key handling routines. */
-#include "clientlibincludes.h"
+#include "silcincludes.h"
+#include "silcclient.h"
#include "client_internal.h"
/* Sends private message to remote client. If private message key has
void silc_client_send_private_message(SilcClient client,
SilcClientConnection conn,
SilcClientEntry client_entry,
+ SilcMessageFlags flags,
unsigned char *data,
- unsigned int data_len,
+ SilcUInt32 data_len,
int force_send)
{
SilcSocketConnection sock = conn->sock;
SilcBuffer buffer;
SilcPacketContext packetdata;
- unsigned int nick_len;
SilcCipher cipher;
SilcHmac hmac;
+ int block_len;
SILC_LOG_DEBUG(("Sending private message"));
- /* Create private message payload */
- nick_len = strlen(conn->nickname);
- buffer = silc_buffer_alloc(2 + nick_len + data_len);
- silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
- silc_buffer_format(buffer,
- SILC_STR_UI_SHORT(nick_len),
- SILC_STR_UI_XNSTRING(conn->nickname,
- nick_len),
- SILC_STR_UI_XNSTRING(data, data_len),
- SILC_STR_END);
+ /* Encode private message payload */
+ buffer = silc_private_message_payload_encode(flags,
+ data_len, data,
+ client_entry->send_key);
/* If we don't have private message specific key then private messages
are just as any normal packet thus call normal packet sending. If
/* Get data used in the encryption */
cipher = client_entry->send_key;
- hmac = conn->hmac;
+ hmac = conn->hmac_send;
+ block_len = silc_cipher_get_block_len(cipher);
/* Set the packet context pointers. */
packetdata.flags = SILC_PACKET_FLAG_PRIVMSG_KEY;
packetdata.type = SILC_PACKET_PRIVATE_MESSAGE;
packetdata.src_id = conn->local_id_data;
- packetdata.src_id_len = SILC_ID_CLIENT_LEN;
+ packetdata.src_id_len = silc_id_get_len(conn->local_id, SILC_ID_CLIENT);
packetdata.src_id_type = SILC_ID_CLIENT;
packetdata.dst_id = silc_id_id2str(client_entry->id, SILC_ID_CLIENT);
- packetdata.dst_id_len = SILC_ID_CLIENT_LEN;
+ packetdata.dst_id_len = silc_id_get_len(client_entry->id, SILC_ID_CLIENT);
packetdata.dst_id_type = SILC_ID_CLIENT;
packetdata.truelen = buffer->len + SILC_PACKET_HEADER_LEN +
packetdata.src_id_len + packetdata.dst_id_len;
packetdata.padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
packetdata.src_id_len +
- packetdata.dst_id_len));
+ packetdata.dst_id_len), block_len);
/* Prepare outgoing data buffer for packet sending */
silc_packet_send_prepare(sock,
packetdata.buffer = sock->outbuf;
- /* Encrypt payload of the packet. Encrypt with private message specific
- key */
- cipher->cipher->encrypt(cipher->context, buffer->data, buffer->data,
- buffer->len, cipher->iv);
-
- /* Put the actual encrypted payload data into the buffer. */
+ /* Put the actual encrypted message payload data into the buffer. */
silc_buffer_put(sock->outbuf, buffer->data, buffer->len);
/* Create the outgoing packet */
- silc_packet_assemble(&packetdata);
+ silc_packet_assemble(&packetdata, cipher);
/* Encrypt the header and padding of the packet. */
cipher = conn->send_key;
- silc_packet_encrypt(cipher, hmac, sock->outbuf, SILC_PACKET_HEADER_LEN +
+ silc_packet_encrypt(cipher, hmac, conn->psn_send++,
+ sock->outbuf, SILC_PACKET_HEADER_LEN +
packetdata.src_id_len + packetdata.dst_id_len +
packetdata.padlen);
silc_free(packetdata.dst_id);
out:
- silc_free(buffer);
+ silc_buffer_free(buffer);
}
+static void silc_client_private_message_cb(SilcClient client,
+ SilcClientConnection conn,
+ SilcClientEntry *clients,
+ SilcUInt32 clients_count,
+ void *context)
+{
+ SilcPacketContext *packet = (SilcPacketContext *)context;
+
+ if (!clients) {
+ silc_packet_context_free(packet);
+ return;
+ }
+
+ silc_client_private_message(client, conn->sock, packet);
+ silc_packet_context_free(packet);
+}
+
/* Private message received. This processes the private message and
finally displays it on the screen. */
SilcPacketContext *packet)
{
SilcClientConnection conn = (SilcClientConnection)sock->user_data;
- SilcBuffer buffer = packet->buffer;
- SilcIDCacheEntry id_cache;
+ SilcPrivateMessagePayload payload = NULL;
SilcClientID *remote_id = NULL;
SilcClientEntry remote_client;
- unsigned short nick_len;
- unsigned char *nickname, *message = NULL;
- int ret;
+ SilcMessageFlags flags;
if (packet->src_id_type != SILC_ID_CLIENT)
goto out;
- /* Get nickname */
- ret = silc_buffer_unformat(buffer,
- SILC_STR_UI16_NSTRING_ALLOC(&nickname, &nick_len),
- SILC_STR_END);
- if (ret == -1)
- return;
-
- silc_buffer_pull(buffer, 2 + nick_len);
-
- message = silc_calloc(buffer->len + 1, sizeof(char));
- memcpy(message, buffer->data, buffer->len);
-
remote_id = silc_id_str2id(packet->src_id, packet->src_id_len,
SILC_ID_CLIENT);
if (!remote_id)
goto out;
/* Check whether we know this client already */
- if (!silc_idcache_find_by_id_one(conn->client_cache, remote_id,
- SILC_ID_CLIENT, &id_cache))
- {
- /* Allocate client entry */
- remote_client = silc_calloc(1, sizeof(*remote_client));
- remote_client->id = remote_id;
- silc_parse_nickname(nickname, &remote_client->nickname,
- &remote_client->server, &remote_client->num);
-
- /* Save the client to cache */
- silc_idcache_add(conn->client_cache, remote_client->nickname,
- SILC_ID_CLIENT, remote_client->id, remote_client,
- TRUE);
- } else {
- remote_client = (SilcClientEntry)id_cache->context;
+ remote_client = silc_client_get_client_by_id(client, conn, remote_id);
+ if (!remote_client || !remote_client->nickname) {
+ if (remote_client) {
+ if (remote_client->status & SILC_CLIENT_STATUS_RESOLVING) {
+ remote_client->status &= ~SILC_CLIENT_STATUS_RESOLVING;
+ goto out;
+ }
+ remote_client->status |= SILC_CLIENT_STATUS_RESOLVING;
}
+ /* Resolve the client info */
+ silc_client_get_client_by_id_resolve(client, conn, remote_id,
+ silc_client_private_message_cb,
+ silc_packet_context_dup(packet));
+ return;
+ }
+
+ /* Parse the payload and decrypt it also if private message key is set */
+ payload = silc_private_message_payload_parse(packet->buffer->data,
+ packet->buffer->len,
+ remote_client->receive_key);
+ if (!payload) {
+ silc_free(remote_id);
+ return;
+ }
+
+ flags = silc_private_message_get_flags(payload);
+
/* Pass the private message to application */
- client->ops->private_message(client, conn, remote_client, message);
+ client->internal->ops->private_message(
+ client, conn, remote_client, flags,
+ silc_private_message_get_message(payload,
+ NULL));
/* See if we are away (gone). If we are away we will reply to the
sender with the set away message. */
- if (conn->away && conn->away->away) {
+ if (conn->away && conn->away->away && !(flags & SILC_MESSAGE_FLAG_NOREPLY)) {
/* If it's me, ignore */
- if (!SILC_ID_CLIENT_COMPARE(remote_id, conn->local_id))
+ if (SILC_ID_CLIENT_COMPARE(remote_id, conn->local_id))
goto out;
/* Send the away message */
silc_client_send_private_message(client, conn, remote_client,
+ SILC_MESSAGE_FLAG_AUTOREPLY |
+ SILC_MESSAGE_FLAG_NOREPLY,
conn->away->away,
strlen(conn->away->away), TRUE);
}
out:
- if (remote_id)
- silc_free(remote_id);
-
- if (message) {
- memset(message, 0, buffer->len);
- silc_free(message);
- }
- silc_free(nickname);
+ if (payload)
+ silc_private_message_payload_free(payload);
+ silc_free(remote_id);
}
/* Function that actually employes the received private message key */
static void silc_client_private_message_key_cb(SilcClient client,
SilcClientConnection conn,
SilcClientEntry *clients,
- unsigned int clients_count,
+ SilcUInt32 clients_count,
void *context)
{
SilcPacketContext *packet = (SilcPacketContext *)context;
unsigned char *key;
- unsigned short key_len;
+ SilcUInt16 key_len;
unsigned char *cipher;
int ret;
/* Now take the key in use */
if (!silc_client_add_private_message_key(client, conn, clients[0],
- cipher, key, key_len, FALSE))
+ cipher, key, key_len, FALSE, TRUE))
goto out;
/* Print some info for application */
- client->ops->say(client, conn,
- "Received private message key from %s%s%s %s%s%s",
- clients[0]->nickname,
- clients[0]->server ? "@" : "",
- clients[0]->server ? clients[0]->server : "",
- clients[0]->username ? "(" : "",
- clients[0]->username ? clients[0]->username : "",
- clients[0]->username ? ")" : "");
+ client->internal->ops->say(
+ client, conn, SILC_CLIENT_MESSAGE_AUDIT,
+ "Received private message key from %s%s%s %s%s%s",
+ clients[0]->nickname,
+ clients[0]->server ? "@" : "",
+ clients[0]->server ? clients[0]->server : "",
+ clients[0]->username ? "(" : "",
+ clients[0]->username ? clients[0]->username : "",
+ clients[0]->username ? ")" : "");
out:
silc_packet_context_free(packet);
requirements of the SILC protocol are met. The API, however, allows
to allocate any cipher.
+ If `responder' is TRUE then the sending and receiving keys will be
+ set according the client being the receiver of the private key. If
+ FALSE the client is being the sender (or negotiator) of the private
+ key.
+
It is not necessary to set key for normal private message usage. If the
key is not set then the private messages are encrypted using normal
session keys. Setting the private key, however, increases the security.
SilcClientEntry client_entry,
char *cipher,
unsigned char *key,
- unsigned int key_len,
- int generate_key)
+ SilcUInt32 key_len,
+ bool generate_key,
+ bool responder)
{
unsigned char private_key[32];
- unsigned int len;
+ SilcUInt32 len;
int i;
SilcSKEKeyMaterial *keymat;
return FALSE;
if (!cipher)
- cipher = "aes-256-cbc";
+ cipher = SILC_DEFAULT_CIPHER;
/* Check the requested cipher */
if (!silc_cipher_is_supported(cipher))
return FALSE;
/* Generate key if not provided */
- if (!key && generate_key == TRUE) {
+ if (generate_key == TRUE) {
len = 32;
for (i = 0; i < len; i++) private_key[i] = silc_rng_get_byte(client->rng);
key = private_key;
}
/* Save the key */
- client_entry->key = silc_calloc(key_len, sizeof(*client_entry->key));
- memcpy(client_entry->key, key, key_len);
+ client_entry->key = silc_memdup(key, key_len);
client_entry->key_len = key_len;
/* Produce the key material as the protocol defines */
keymat = silc_calloc(1, sizeof(*keymat));
if (silc_ske_process_key_material_data(key, key_len, 16, 256, 16,
- client->md5hash, keymat)
+ client->internal->md5hash, keymat)
!= SILC_SKE_STATUS_OK)
return FALSE;
silc_cipher_alloc(cipher, &client_entry->receive_key);
/* Set the keys */
- silc_cipher_set_key(client_entry->send_key, keymat->send_enc_key,
- keymat->enc_key_len);
- silc_cipher_set_iv(client_entry->send_key, keymat->send_iv);
- silc_cipher_set_key(client_entry->receive_key, keymat->receive_enc_key,
- keymat->enc_key_len);
- silc_cipher_set_iv(client_entry->receive_key, keymat->receive_iv);
+ if (responder == TRUE) {
+ silc_cipher_set_key(client_entry->send_key, keymat->receive_enc_key,
+ keymat->enc_key_len);
+ silc_cipher_set_iv(client_entry->send_key, keymat->receive_iv);
+ silc_cipher_set_key(client_entry->receive_key, keymat->send_enc_key,
+ keymat->enc_key_len);
+ silc_cipher_set_iv(client_entry->receive_key, keymat->send_iv);
+ } else {
+ silc_cipher_set_key(client_entry->send_key, keymat->send_enc_key,
+ keymat->enc_key_len);
+ silc_cipher_set_iv(client_entry->send_key, keymat->send_iv);
+ silc_cipher_set_key(client_entry->receive_key, keymat->receive_enc_key,
+ keymat->enc_key_len);
+ silc_cipher_set_iv(client_entry->receive_key, keymat->receive_iv);
+ }
/* Free the key material */
silc_ske_free_key_material(keymat);
SilcClientConnection conn,
SilcClientEntry client_entry,
char *cipher,
- SilcSKEKeyMaterial *key)
+ SilcSKEKeyMaterial *key,
+ bool responder)
{
assert(client_entry);
return FALSE;
if (!cipher)
- cipher = "aes-256-cbc";
+ cipher = SILC_DEFAULT_CIPHER;
/* Check the requested cipher */
if (!silc_cipher_is_supported(cipher))
silc_cipher_alloc(cipher, &client_entry->receive_key);
/* Set the keys */
- silc_cipher_set_key(client_entry->send_key, key->send_enc_key,
- key->enc_key_len);
- silc_cipher_set_iv(client_entry->send_key, key->send_iv);
- silc_cipher_set_key(client_entry->receive_key, key->receive_enc_key,
- key->enc_key_len);
- silc_cipher_set_iv(client_entry->receive_key, key->receive_iv);
+ if (responder == TRUE) {
+ silc_cipher_set_key(client_entry->send_key, key->receive_enc_key,
+ key->enc_key_len);
+ silc_cipher_set_iv(client_entry->send_key, key->receive_iv);
+ silc_cipher_set_key(client_entry->receive_key, key->send_enc_key,
+ key->enc_key_len);
+ silc_cipher_set_iv(client_entry->receive_key, key->send_iv);
+ } else {
+ silc_cipher_set_key(client_entry->send_key, key->send_enc_key,
+ key->enc_key_len);
+ silc_cipher_set_iv(client_entry->send_key, key->send_iv);
+ silc_cipher_set_key(client_entry->receive_key, key->receive_enc_key,
+ key->enc_key_len);
+ silc_cipher_set_iv(client_entry->receive_key, key->receive_iv);
+ }
return TRUE;
}
SilcPrivateMessageKeys
silc_client_list_private_message_keys(SilcClient client,
SilcClientConnection conn,
- unsigned int *key_count)
+ SilcUInt32 *key_count)
{
SilcPrivateMessageKeys keys;
- unsigned int count = 0;
+ SilcUInt32 count = 0;
SilcIDCacheEntry id_cache;
SilcIDCacheList list;
SilcClientEntry entry;
- if (!silc_idcache_find_by_id(conn->client_cache, SILC_ID_CACHE_ANY,
- SILC_ID_CLIENT, &list))
+ if (!silc_idcache_get_all(conn->client_cache, &list))
return NULL;
if (!silc_idcache_list_count(list)) {
silc_client_list_private_message_keys. */
void silc_client_free_private_message_keys(SilcPrivateMessageKeys keys,
- unsigned int key_count)
+ SilcUInt32 key_count)
{
silc_free(keys);
}
+
+/* Sets away `message'. The away message may be set when the client's
+ mode is changed to SILC_UMODE_GONE and the client whishes to reply
+ to anyone who sends private message. The `message' will be sent
+ automatically back to the the client who send private message. If
+ away message is already set this replaces the old message with the
+ new one. If `message' is NULL the old away message is removed.
+ The sender may freely free the memory of the `message'. */
+
+void silc_client_set_away_message(SilcClient client,
+ SilcClientConnection conn,
+ char *message)
+{
+ if (!message && conn->away) {
+ silc_free(conn->away->away);
+ silc_free(conn->away);
+ conn->away = NULL;
+ }
+
+ if (message) {
+ if (!conn->away)
+ conn->away = silc_calloc(1, sizeof(*conn->away));
+ if (conn->away->away)
+ silc_free(conn->away->away);
+ conn->away->away = strdup(message);
+ }
+}
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