/*
This file is part of GNUnet.
- (C) 2009, 2010, 2011, 2012 Christian Grothoff (and other contributing authors)
+ (C) 2009-2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
{
/**
- * Message type is CORE_EPHEMERAL_KEY.
+ * Message type is #GNUNET_MESSAGE_TYPE_CORE_EPHEMERAL_KEY.
*/
struct GNUNET_MessageHeader header;
* An ECC signature of the 'origin' asserting the validity of
* the given ephemeral key.
*/
- struct GNUNET_CRYPTO_EccSignature signature;
+ struct GNUNET_CRYPTO_EddsaSignature signature;
/**
* Information about what is being signed.
* At what time was this key created (beginning of validity).
*/
struct GNUNET_TIME_AbsoluteNBO creation_time;
-
+
/**
* When does the given ephemeral key expire (end of validity).
*/
struct GNUNET_TIME_AbsoluteNBO expiration_time;
/**
- * Ephemeral public ECC key (always for NIST P-521) encoded in a format suitable
- * for network transmission as created using 'gcry_sexp_sprint'.
+ * Ephemeral public ECC key.
*/
- struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded ephemeral_key;
+ struct GNUNET_CRYPTO_EcdhePublicKey ephemeral_key;
/**
* Public key of the signing peer (persistent version, not the ephemeral public key).
*/
- struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded origin_public_key;
+ struct GNUNET_PeerIdentity origin_identity;
};
struct PingMessage
{
/**
- * Message type is CORE_PING.
+ * Message type is #GNUNET_MESSAGE_TYPE_CORE_PING.
*/
struct GNUNET_MessageHeader header;
struct PongMessage
{
/**
- * Message type is CORE_PONG.
+ * Message type is #GNUNET_MESSAGE_TYPE_CORE_PONG.
*/
struct GNUNET_MessageHeader header;
struct EncryptedMessage
{
/**
- * Message type is either CORE_ENCRYPTED_MESSAGE.
+ * Message type is either #GNUNET_MESSAGE_TYPE_CORE_ENCRYPTED_MESSAGE.
*/
struct GNUNET_MessageHeader header;
#define ENCRYPTED_HEADER_SIZE (offsetof(struct EncryptedMessage, sequence_number))
-/**
- * State machine for our P2P encryption handshake. Everyone starts in
- * "DOWN", if we receive the other peer's key (other peer initiated)
- * we start in state RECEIVED (since we will immediately send our
- * own); otherwise we start in SENT. If we get back a PONG from
- * within either state, we move up to CONFIRMED (the PONG will always
- * be sent back encrypted with the key we sent to the other peer).
- */
-enum KxStateMachine
-{
- /**
- * No handshake yet.
- */
- KX_STATE_DOWN,
-
- /**
- * We've sent our session key.
- */
- KX_STATE_KEY_SENT,
-
- /**
- * We've received the other peers session key.
- */
- KX_STATE_KEY_RECEIVED,
-
- /**
- * The other peer has confirmed our session key + PING with a PONG
- * message encrypted with his session key (which we got). Key
- * exchange is done.
- */
- KX_STATE_UP,
-
- /**
- * We're rekeying (or had a timeout), so we have sent the other peer
- * our new ephemeral key, but we did not get a matching PONG yet.
- * This is equivalent to being 'KX_STATE_KEY_RECEIVED', except that
- * the session is marked as 'up' with sessions (as we don't want to
- * drop and re-establish P2P connections simply due to rekeying).
- */
- KX_STATE_REKEY_SENT
-
-};
-
-
/**
* Information about the status of a key exchange with another peer.
*/
*/
struct PingMessage ping;
+ /**
+ * Ephemeral public ECC key of the other peer.
+ */
+ struct GNUNET_CRYPTO_EcdhePublicKey other_ephemeral_key;
+
/**
* Key we use to encrypt our messages for the other peer
* (initialized by us when we do the handshake).
*/
- struct GNUNET_CRYPTO_AesSessionKey encrypt_key;
+ struct GNUNET_CRYPTO_SymmetricSessionKey encrypt_key;
/**
* Key we use to decrypt messages from the other peer
* (given to us by the other peer during the handshake).
*/
- struct GNUNET_CRYPTO_AesSessionKey decrypt_key;
+ struct GNUNET_CRYPTO_SymmetricSessionKey decrypt_key;
/**
* At what time did the other peer generate the decryption key?
/**
* What is our connection status?
*/
- enum KxStateMachine status;
+ enum GNUNET_CORE_KxState status;
};
/**
* Our private key.
*/
-static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
+static struct GNUNET_CRYPTO_EddsaPrivateKey *my_private_key;
/**
* Our ephemeral private key.
*/
-static struct GNUNET_CRYPTO_EccPrivateKey *my_ephemeral_key;
+static struct GNUNET_CRYPTO_EcdhePrivateKey *my_ephemeral_key;
/**
* Current message we send for a key exchange.
*/
static struct EphemeralKeyMessage current_ekm;
-/**
- * Our public key.
- */
-static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key;
-
/**
* Our message stream tokenizer (for encrypted payload).
*/
/**
* Task scheduled for periodic re-generation (and thus rekeying) of our
* ephemeral key.
- */
+ */
static GNUNET_SCHEDULER_TaskIdentifier rekey_task;
+/**
+ * Notification context for all monitors.
+ */
+static struct GNUNET_SERVER_NotificationContext *nc;
+
+
+/**
+ * Inform the given monitor about the KX state of
+ * the given peer.
+ *
+ * @param mc monitor to inform
+ * @param kx key exchange state to inform about
+ */
+static void
+monitor_notify (struct GNUNET_SERVER_Client *client,
+ struct GSC_KeyExchangeInfo *kx)
+{
+ struct MonitorNotifyMessage msg;
+
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_CORE_MONITOR_NOTIFY);
+ msg.header.size = htons (sizeof (msg));
+ msg.state = htonl ((uint32_t) kx->status);
+ msg.peer = kx->peer;
+ msg.timeout = GNUNET_TIME_absolute_hton (kx->timeout);
+ GNUNET_SERVER_notification_context_unicast (nc,
+ client,
+ &msg.header,
+ GNUNET_NO);
+}
+
+
+/**
+ * Inform all monitors about the KX state of the given peer.
+ *
+ * @param kx key exchange state to inform about
+ */
+static void
+monitor_notify_all (struct GSC_KeyExchangeInfo *kx)
+{
+ struct MonitorNotifyMessage msg;
+
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_CORE_MONITOR_NOTIFY);
+ msg.header.size = htons (sizeof (msg));
+ msg.state = htonl ((uint32_t) kx->status);
+ msg.peer = kx->peer;
+ msg.timeout = GNUNET_TIME_absolute_hton (kx->timeout);
+ GNUNET_SERVER_notification_context_broadcast (nc,
+ &msg.header,
+ GNUNET_NO);
+}
+
/**
* Derive an authentication key from "set key" information
*/
static void
derive_auth_key (struct GNUNET_CRYPTO_AuthKey *akey,
- const struct GNUNET_CRYPTO_AesSessionKey *skey, uint32_t seed)
+ const struct GNUNET_CRYPTO_SymmetricSessionKey *skey, uint32_t seed)
{
static const char ctx[] = "authentication key";
- GNUNET_CRYPTO_hmac_derive_key (akey, skey, &seed, sizeof (seed), &skey->key,
- sizeof (skey->key), ctx,
- sizeof (ctx), NULL);
+ GNUNET_CRYPTO_hmac_derive_key (akey, skey,
+ &seed, sizeof (seed),
+ skey, sizeof (struct GNUNET_CRYPTO_SymmetricSessionKey),
+ ctx, sizeof (ctx),
+ NULL);
}
* @param identity identity of the other peer to use
*/
static void
-derive_iv (struct GNUNET_CRYPTO_AesInitializationVector *iv,
- const struct GNUNET_CRYPTO_AesSessionKey *skey, uint32_t seed,
+derive_iv (struct GNUNET_CRYPTO_SymmetricInitializationVector *iv,
+ const struct GNUNET_CRYPTO_SymmetricSessionKey *skey, uint32_t seed,
const struct GNUNET_PeerIdentity *identity)
{
static const char ctx[] = "initialization vector";
- GNUNET_CRYPTO_aes_derive_iv (iv, skey, &seed, sizeof (seed),
- &identity->hashPubKey.bits,
- sizeof (identity->hashPubKey.bits), ctx,
- sizeof (ctx), NULL);
+ GNUNET_CRYPTO_symmetric_derive_iv (iv, skey, &seed, sizeof (seed),
+ identity,
+ sizeof (struct GNUNET_PeerIdentity), ctx,
+ sizeof (ctx), NULL);
}
* @param identity identity of the other peer to use
*/
static void
-derive_pong_iv (struct GNUNET_CRYPTO_AesInitializationVector *iv,
- const struct GNUNET_CRYPTO_AesSessionKey *skey, uint32_t seed,
+derive_pong_iv (struct GNUNET_CRYPTO_SymmetricInitializationVector *iv,
+ const struct GNUNET_CRYPTO_SymmetricSessionKey *skey, uint32_t seed,
uint32_t challenge, const struct GNUNET_PeerIdentity *identity)
{
static const char ctx[] = "pong initialization vector";
- GNUNET_CRYPTO_aes_derive_iv (iv, skey, &seed, sizeof (seed),
- &identity->hashPubKey.bits,
- sizeof (identity->hashPubKey.bits), &challenge,
- sizeof (challenge), ctx, sizeof (ctx), NULL);
+ GNUNET_CRYPTO_symmetric_derive_iv (iv, skey, &seed, sizeof (seed),
+ identity,
+ sizeof (struct GNUNET_PeerIdentity),
+ &challenge, sizeof (challenge),
+ ctx, sizeof (ctx),
+ NULL);
}
* @param sender peer identity of the sender
* @param receiver peer identity of the sender
* @param key_material high entropy key material to use
- * @param skey set to derived session key
+ * @param skey set to derived session key
*/
static void
derive_aes_key (const struct GNUNET_PeerIdentity *sender,
const struct GNUNET_PeerIdentity *receiver,
const struct GNUNET_HashCode *key_material,
- struct GNUNET_CRYPTO_AesSessionKey *skey)
+ struct GNUNET_CRYPTO_SymmetricSessionKey *skey)
{
static const char ctx[] = "aes key generation vector";
- GNUNET_CRYPTO_kdf (skey, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
+ GNUNET_CRYPTO_kdf (skey, sizeof (struct GNUNET_CRYPTO_SymmetricSessionKey),
ctx, sizeof (ctx),
- skey, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
+ key_material, sizeof (struct GNUNET_HashCode),
sender, sizeof (struct GNUNET_PeerIdentity),
receiver, sizeof (struct GNUNET_PeerIdentity),
NULL);
/**
- * Encrypt size bytes from in and write the result to out. Use the
- * key for outbound traffic of the given neighbour.
+ * Encrypt size bytes from @a in and write the result to @a out. Use the
+ * @a kx key for outbound traffic of the given neighbour.
*
* @param kx key information context
* @param iv initialization vector to use
* @param in ciphertext
* @param out plaintext
- * @param size size of in/out
- * @return GNUNET_OK on success
+ * @param size size of @a in/@a out
+ * @return #GNUNET_OK on success
*/
static int
do_encrypt (struct GSC_KeyExchangeInfo *kx,
- const struct GNUNET_CRYPTO_AesInitializationVector *iv,
+ const struct GNUNET_CRYPTO_SymmetricInitializationVector *iv,
const void *in, void *out, size_t size)
{
if (size != (uint16_t) size)
return GNUNET_NO;
}
GNUNET_assert (size ==
- GNUNET_CRYPTO_aes_encrypt (in, (uint16_t) size,
+ GNUNET_CRYPTO_symmetric_encrypt (in, (uint16_t) size,
&kx->encrypt_key, iv, out));
GNUNET_STATISTICS_update (GSC_stats, gettext_noop ("# bytes encrypted"), size,
GNUNET_NO);
/**
- * Decrypt size bytes from in and write the result to out. Use the
- * key for inbound traffic of the given neighbour. This function does
+ * Decrypt size bytes from @a in and write the result to @a out. Use the
+ * @a kx key for inbound traffic of the given neighbour. This function does
* NOT do any integrity-checks on the result.
*
* @param kx key information context
* @param iv initialization vector to use
* @param in ciphertext
* @param out plaintext
- * @param size size of in/out
- * @return GNUNET_OK on success
+ * @param size size of @a in / @a out
+ * @return #GNUNET_OK on success
*/
static int
do_decrypt (struct GSC_KeyExchangeInfo *kx,
- const struct GNUNET_CRYPTO_AesInitializationVector *iv,
+ const struct GNUNET_CRYPTO_SymmetricInitializationVector *iv,
const void *in, void *out, size_t size)
{
if (size != (uint16_t) size)
GNUNET_break (0);
return GNUNET_NO;
}
- if ( (kx->status != KX_STATE_KEY_RECEIVED) && (kx->status != KX_STATE_UP) &&
- (kx->status != KX_STATE_REKEY_SENT) )
+ if ( (kx->status != GNUNET_CORE_KX_STATE_KEY_RECEIVED) &&
+ (kx->status != GNUNET_CORE_KX_STATE_UP) &&
+ (kx->status != GNUNET_CORE_KX_STATE_REKEY_SENT) )
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (size !=
- GNUNET_CRYPTO_aes_decrypt (in, (uint16_t) size, &kx->decrypt_key, iv,
+ GNUNET_CRYPTO_symmetric_decrypt (in, (uint16_t) size, &kx->decrypt_key, iv,
out))
{
GNUNET_break (0);
/**
- * Task that will retry "send_key" if our previous attempt failed.
+ * Task that will retry #send_key() if our previous attempt failed.
*
- * @param cls our 'struct GSC_KeyExchangeInfo'
+ * @param cls our `struct GSC_KeyExchangeInfo`
* @param tc scheduler context
*/
static void
-set_key_retry_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+set_key_retry_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GSC_KeyExchangeInfo *kx = cls;
kx->retry_set_key_task = GNUNET_SCHEDULER_NO_TASK;
kx->set_key_retry_frequency = GNUNET_TIME_STD_BACKOFF (kx->set_key_retry_frequency);
+ GNUNET_assert (GNUNET_CORE_KX_STATE_DOWN != kx->status);
send_key (kx);
}
{
struct PingMessage pp;
struct PingMessage *pm;
- struct GNUNET_CRYPTO_AesInitializationVector iv;
+ struct GNUNET_CRYPTO_SymmetricInitializationVector iv;
pm = &kx->ping;
pm->header.size = htons (sizeof (struct PingMessage));
GSC_KX_start (const struct GNUNET_PeerIdentity *pid)
{
struct GSC_KeyExchangeInfo *kx;
+ struct GNUNET_HashCode h1;
+ struct GNUNET_HashCode h2;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Initiating key exchange with `%s'\n",
GNUNET_i2s (pid));
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop ("# key exchanges initiated"), 1,
GNUNET_NO);
- kx = GNUNET_malloc (sizeof (struct GSC_KeyExchangeInfo));
+ kx = GNUNET_new (struct GSC_KeyExchangeInfo);
kx->peer = *pid;
kx->set_key_retry_frequency = INITIAL_SET_KEY_RETRY_FREQUENCY;
GNUNET_CONTAINER_DLL_insert (kx_head,
kx_tail,
kx);
- if (0 < GNUNET_CRYPTO_hash_cmp (&pid->hashPubKey,
- &GSC_my_identity.hashPubKey))
+ kx->status = GNUNET_CORE_KX_STATE_KEY_SENT;
+ monitor_notify_all (kx);
+ GNUNET_CRYPTO_hash (pid,
+ sizeof (struct GNUNET_PeerIdentity),
+ &h1);
+ GNUNET_CRYPTO_hash (&GSC_my_identity,
+ sizeof (struct GNUNET_PeerIdentity),
+ &h2);
+ if (0 < GNUNET_CRYPTO_hash_cmp (&h1,
+ &h2))
{
/* peer with "lower" identity starts KX, otherwise we typically end up
- with both peers starting the exchange and transmit the 'set key'
+ with both peers starting the exchange and transmit the 'set key'
message twice */
- kx->status = KX_STATE_KEY_SENT;
send_key (kx);
}
+ else
+ {
+ /* peer with "higher" identity starts a delayed KX, if the "lower" peer
+ * does not start a KX since he sees no reasons to do so */
+ kx->retry_set_key_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS,
+ &set_key_retry_task, kx);
+ }
return kx;
}
void
GSC_KX_stop (struct GSC_KeyExchangeInfo *kx)
{
+ GSC_SESSIONS_end (&kx->peer);
GNUNET_STATISTICS_update (GSC_stats, gettext_noop ("# key exchanges stopped"),
1, GNUNET_NO);
if (kx->retry_set_key_task != GNUNET_SCHEDULER_NO_TASK)
GNUNET_SCHEDULER_cancel (kx->keep_alive_task);
kx->keep_alive_task = GNUNET_SCHEDULER_NO_TASK;
}
+ kx->status = GNUNET_CORE_KX_PEER_DISCONNECT;
+ monitor_notify_all (kx);
GNUNET_CONTAINER_DLL_remove (kx_head,
kx_tail,
kx);
MIN_PING_FREQUENCY);
}
+
+/**
+ * Derive fresh session keys from the current ephemeral keys.
+ *
+ * @param kx session to derive keys for
+ */
+static void
+derive_session_keys (struct GSC_KeyExchangeInfo *kx)
+{
+ struct GNUNET_HashCode key_material;
+
+ if (GNUNET_OK !=
+ GNUNET_CRYPTO_ecc_ecdh (my_ephemeral_key,
+ &kx->other_ephemeral_key,
+ &key_material))
+ {
+ GNUNET_break (0);
+ return;
+ }
+ derive_aes_key (&GSC_my_identity,
+ &kx->peer,
+ &key_material,
+ &kx->encrypt_key);
+ derive_aes_key (&kx->peer,
+ &GSC_my_identity,
+ &key_material,
+ &kx->decrypt_key);
+ memset (&key_material, 0, sizeof (key_material));
+ /* fresh key, reset sequence numbers */
+ kx->last_sequence_number_received = 0;
+ kx->last_packets_bitmap = 0;
+ setup_fresh_ping (kx);
+}
+
+
/**
* We received a SET_KEY message. Validate and update
* our key material and status.
struct GNUNET_TIME_Absolute start_t;
struct GNUNET_TIME_Absolute end_t;
struct GNUNET_TIME_Absolute now;
- struct GNUNET_PeerIdentity signer_id;
- enum KxStateMachine sender_status;
+ enum GNUNET_CORE_KxState sender_status;
uint16_t size;
- struct GNUNET_HashCode key_material;
-
+
size = ntohs (msg->size);
if (sizeof (struct EphemeralKeyMessage) != size)
{
}
m = (const struct EphemeralKeyMessage *) msg;
end_t = GNUNET_TIME_absolute_ntoh (m->expiration_time);
- if ( ( (KX_STATE_KEY_RECEIVED == kx->status) ||
- (KX_STATE_UP == kx->status) ||
- (KX_STATE_REKEY_SENT == kx->status) ) &&
- (end_t.abs_value <= kx->foreign_key_expires.abs_value) )
+ if ( ( (GNUNET_CORE_KX_STATE_KEY_RECEIVED == kx->status) ||
+ (GNUNET_CORE_KX_STATE_UP == kx->status) ||
+ (GNUNET_CORE_KX_STATE_REKEY_SENT == kx->status) ) &&
+ (end_t.abs_value_us <= kx->foreign_key_expires.abs_value_us) )
{
GNUNET_STATISTICS_update (GSC_stats, gettext_noop ("# old ephemeral keys ignored"),
1, GNUNET_NO);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Core service receives `%s' request from `%4s'.\n", "EPHEMERAL_KEY",
GNUNET_i2s (&kx->peer));
- GNUNET_CRYPTO_hash (&m->origin_public_key,
- sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded),
- &signer_id.hashPubKey);
if (0 !=
- memcmp (&signer_id, &kx->peer,
+ memcmp (&m->origin_identity,
+ &kx->peer.public_key,
sizeof (struct GNUNET_PeerIdentity)))
- {
+ {
GNUNET_break_op (0);
return;
}
sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
sizeof (struct GNUNET_TIME_AbsoluteNBO) +
sizeof (struct GNUNET_TIME_AbsoluteNBO) +
- sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded) +
- sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded)) ||
+ sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
+ sizeof (struct GNUNET_CRYPTO_EddsaPublicKey)) ||
(GNUNET_OK !=
- GNUNET_CRYPTO_ecc_verify (GNUNET_SIGNATURE_PURPOSE_SET_ECC_KEY,
+ GNUNET_CRYPTO_eddsa_verify (GNUNET_SIGNATURE_PURPOSE_SET_ECC_KEY,
&m->purpose,
- &m->signature, &m->origin_public_key)))
+ &m->signature, &m->origin_identity.public_key)))
{
/* invalid signature */
GNUNET_break_op (0);
return;
}
now = GNUNET_TIME_absolute_get ();
- if ( (end_t.abs_value < GNUNET_TIME_absolute_subtract (now, REKEY_TOLERANCE).abs_value) ||
- (start_t.abs_value > GNUNET_TIME_absolute_add (now, REKEY_TOLERANCE).abs_value) )
+ if ( (end_t.abs_value_us < GNUNET_TIME_absolute_subtract (now, REKEY_TOLERANCE).abs_value_us) ||
+ (start_t.abs_value_us > GNUNET_TIME_absolute_add (now, REKEY_TOLERANCE).abs_value_us) )
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Ephemeral key message rejected as its validity range does not match our system time (%llu not in [%llu,%llu]).\n"),
- now.abs_value,
- start_t.abs_value,
- end_t.abs_value);
- return;
- }
- if (GNUNET_OK !=
- GNUNET_CRYPTO_ecc_ecdh (my_ephemeral_key,
- &m->ephemeral_key,
- &key_material))
- {
- GNUNET_break (0);
+ _("Ephemeral key message from peer `%s' rejected as its validity range does not match our system time (%llu not in [%llu,%llu]).\n"),
+ GNUNET_i2s (&kx->peer),
+ now.abs_value_us,
+ start_t.abs_value_us,
+ end_t.abs_value_us);
return;
}
+ kx->other_ephemeral_key = m->ephemeral_key;
+ kx->foreign_key_expires = end_t;
+ derive_session_keys (kx);
GNUNET_STATISTICS_update (GSC_stats,
- gettext_noop ("# EPHEMERAL_KEY messages decrypted"), 1,
+ gettext_noop ("# EPHEMERAL_KEY messages received"), 1,
GNUNET_NO);
- derive_aes_key (&GSC_my_identity,
- &kx->peer,
- &key_material,
- &kx->encrypt_key);
- derive_aes_key (&kx->peer,
- &GSC_my_identity,
- &key_material,
- &kx->decrypt_key);
- /* fresh key, reset sequence numbers */
- kx->last_sequence_number_received = 0;
- kx->last_packets_bitmap = 0;
- kx->foreign_key_expires = end_t;
- setup_fresh_ping (kx);
/* check if we still need to send the sender our key */
- sender_status = (enum KxStateMachine) ntohl (m->sender_status);
+ sender_status = (enum GNUNET_CORE_KxState) ntohl (m->sender_status);
switch (sender_status)
{
- case KX_STATE_DOWN:
- /* makes no sense, should be at least KX_STATE_KEY_SENT */
+ case GNUNET_CORE_KX_STATE_DOWN:
GNUNET_break_op (0);
break;
- case KX_STATE_KEY_SENT:
- send_key (kx);
+ case GNUNET_CORE_KX_STATE_KEY_SENT:
+ /* fine, need to send our key after updating our status, see below */
break;
- case KX_STATE_KEY_RECEIVED:
- case KX_STATE_UP:
- case KX_STATE_REKEY_SENT:
+ case GNUNET_CORE_KX_STATE_KEY_RECEIVED:
+ case GNUNET_CORE_KX_STATE_UP:
+ case GNUNET_CORE_KX_STATE_REKEY_SENT:
/* other peer already got our key */
break;
default:
/* check if we need to confirm everything is fine via PING + PONG */
switch (kx->status)
{
- case KX_STATE_DOWN:
- kx->status = KX_STATE_KEY_RECEIVED;
+ case GNUNET_CORE_KX_STATE_DOWN:
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == kx->keep_alive_task);
+ kx->status = GNUNET_CORE_KX_STATE_KEY_RECEIVED;
+ monitor_notify_all (kx);
+ if (GNUNET_CORE_KX_STATE_KEY_SENT == sender_status)
+ send_key (kx);
send_ping (kx);
break;
- case KX_STATE_KEY_SENT:
- kx->status = KX_STATE_KEY_RECEIVED;
+ case GNUNET_CORE_KX_STATE_KEY_SENT:
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == kx->keep_alive_task);
+ kx->status = GNUNET_CORE_KX_STATE_KEY_RECEIVED;
+ monitor_notify_all (kx);
+ if (GNUNET_CORE_KX_STATE_KEY_SENT == sender_status)
+ send_key (kx);
send_ping (kx);
break;
- case KX_STATE_KEY_RECEIVED:
+ case GNUNET_CORE_KX_STATE_KEY_RECEIVED:
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == kx->keep_alive_task);
+ if (GNUNET_CORE_KX_STATE_KEY_SENT == sender_status)
+ send_key (kx);
send_ping (kx);
break;
- case KX_STATE_UP:
- kx->status = KX_STATE_REKEY_SENT;
+ case GNUNET_CORE_KX_STATE_UP:
+ kx->status = GNUNET_CORE_KX_STATE_REKEY_SENT;
+ monitor_notify_all (kx);
+ if (GNUNET_CORE_KX_STATE_KEY_SENT == sender_status)
+ send_key (kx);
/* we got a new key, need to reconfirm! */
send_ping (kx);
break;
- case KX_STATE_REKEY_SENT:
- kx->status = KX_STATE_REKEY_SENT;
+ case GNUNET_CORE_KX_STATE_REKEY_SENT:
+ if (GNUNET_CORE_KX_STATE_KEY_SENT == sender_status)
+ send_key (kx);
/* we got a new key, need to reconfirm! */
send_ping (kx);
break;
struct PingMessage t;
struct PongMessage tx;
struct PongMessage tp;
- struct GNUNET_CRYPTO_AesInitializationVector iv;
+ struct GNUNET_CRYPTO_SymmetricInitializationVector iv;
uint16_t msize;
msize = ntohs (msg->size);
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop ("# PING messages received"), 1,
GNUNET_NO);
- if ( (kx->status != KX_STATE_KEY_RECEIVED) &&
- (kx->status != KX_STATE_UP) &&
- (kx->status != KX_STATE_REKEY_SENT))
+ if ( (kx->status != GNUNET_CORE_KX_STATE_KEY_RECEIVED) &&
+ (kx->status != GNUNET_CORE_KX_STATE_UP) &&
+ (kx->status != GNUNET_CORE_KX_STATE_REKEY_SENT))
{
/* ignore */
GNUNET_STATISTICS_update (GSC_stats,
kx->keep_alive_task = GNUNET_SCHEDULER_NO_TASK;
left = GNUNET_TIME_absolute_get_remaining (kx->timeout);
- if (0 == left.rel_value)
+ if (0 == left.rel_value_us)
{
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop ("# sessions terminated by timeout"),
1, GNUNET_NO);
GSC_SESSIONS_end (&kx->peer);
- kx->status = KX_STATE_KEY_SENT;
+ kx->status = GNUNET_CORE_KX_STATE_KEY_SENT;
+ monitor_notify_all (kx);
send_key (kx);
return;
}
{
const struct PongMessage *m;
struct PongMessage t;
- struct GNUNET_CRYPTO_AesInitializationVector iv;
+ struct GNUNET_CRYPTO_SymmetricInitializationVector iv;
uint16_t msize;
msize = ntohs (msg->size);
GNUNET_NO);
switch (kx->status)
{
- case KX_STATE_DOWN:
+ case GNUNET_CORE_KX_STATE_DOWN:
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop ("# PONG messages dropped (connection down)"), 1,
GNUNET_NO);
return;
- case KX_STATE_KEY_SENT:
+ case GNUNET_CORE_KX_STATE_KEY_SENT:
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop ("# PONG messages dropped (out of order)"), 1,
GNUNET_NO);
return;
- case KX_STATE_KEY_RECEIVED:
+ case GNUNET_CORE_KX_STATE_KEY_RECEIVED:
break;
- case KX_STATE_UP:
+ case GNUNET_CORE_KX_STATE_UP:
break;
- case KX_STATE_REKEY_SENT:
+ case GNUNET_CORE_KX_STATE_REKEY_SENT:
break;
default:
GNUNET_break (0);
{
GNUNET_SCHEDULER_cancel (kx->retry_set_key_task);
kx->retry_set_key_task = GNUNET_SCHEDULER_NO_TASK;
- }
+ }
switch (kx->status)
{
- case KX_STATE_DOWN:
+ case GNUNET_CORE_KX_STATE_DOWN:
GNUNET_assert (0); /* should be impossible */
return;
- case KX_STATE_KEY_SENT:
+ case GNUNET_CORE_KX_STATE_KEY_SENT:
GNUNET_assert (0); /* should be impossible */
return;
- case KX_STATE_KEY_RECEIVED:
+ case GNUNET_CORE_KX_STATE_KEY_RECEIVED:
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop
("# session keys confirmed via PONG"), 1,
GNUNET_NO);
- kx->status = KX_STATE_UP;
+ kx->status = GNUNET_CORE_KX_STATE_UP;
+ monitor_notify_all (kx);
GSC_SESSIONS_create (&kx->peer, kx);
GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == kx->keep_alive_task);
update_timeout (kx);
break;
- case KX_STATE_UP:
+ case GNUNET_CORE_KX_STATE_UP:
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop
("# timeouts prevented via PONG"), 1,
GNUNET_NO);
update_timeout (kx);
break;
- case KX_STATE_REKEY_SENT:
+ case GNUNET_CORE_KX_STATE_REKEY_SENT:
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop
("# rekey operations confirmed via PONG"), 1,
GNUNET_NO);
- kx->status = KX_STATE_UP;
+ kx->status = GNUNET_CORE_KX_STATE_UP;
+ monitor_notify_all (kx);
update_timeout (kx);
break;
default:
static void
send_key (struct GSC_KeyExchangeInfo *kx)
{
+ GNUNET_assert (GNUNET_CORE_KX_STATE_DOWN != kx->status);
if (GNUNET_SCHEDULER_NO_TASK != kx->retry_set_key_task)
{
GNUNET_SCHEDULER_cancel (kx->retry_set_key_task);
kx->retry_set_key_task = GNUNET_SCHEDULER_NO_TASK;
}
/* always update sender status in SET KEY message */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending key to `%s' (my status: %d)\n",
GNUNET_i2s (&kx->peer),
kx->status);
- current_ekm.sender_status = htonl ((int32_t) (kx->status));
+ current_ekm.sender_status = htonl ((int32_t) (kx->status));
GSC_NEIGHBOURS_transmit (&kx->peer, ¤t_ekm.header,
kx->set_key_retry_frequency);
kx->retry_set_key_task =
char cbuf[used]; /* ciphertext */
struct EncryptedMessage *em; /* encrypted message */
struct EncryptedMessage *ph; /* plaintext header */
- struct GNUNET_CRYPTO_AesInitializationVector iv;
+ struct GNUNET_CRYPTO_SymmetricInitializationVector iv;
struct GNUNET_CRYPTO_AuthKey auth_key;
ph = (struct EncryptedMessage *) pbuf;
used - ENCRYPTED_HEADER_SIZE));
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Encrypted %u bytes for %s\n",
used - ENCRYPTED_HEADER_SIZE, GNUNET_i2s (&kx->peer));
- derive_auth_key (&auth_key,
- &kx->encrypt_key,
+ derive_auth_key (&auth_key,
+ &kx->encrypt_key,
ph->iv_seed);
GNUNET_CRYPTO_hmac (&auth_key, &em->sequence_number,
used - ENCRYPTED_HEADER_SIZE, &em->hmac);
/**
- * Closure for 'deliver_message'
+ * Closure for #deliver_message()
*/
struct DeliverMessageContext
{
- /**
- * Performance information for the connection.
- */
- const struct GNUNET_ATS_Information *atsi;
-
/**
* Key exchange context.
*/
* Sender of the message.
*/
const struct GNUNET_PeerIdentity *peer;
-
- /**
- * Number of entries in 'atsi' array.
- */
- uint32_t atsi_count;
};
*
* @param kx key exchange context for encrypting the message
* @param msg encrypted message
- * @param atsi performance data
- * @param atsi_count number of entries in ats (excluding 0-termination)
*/
void
GSC_KX_handle_encrypted_message (struct GSC_KeyExchangeInfo *kx,
- const struct GNUNET_MessageHeader *msg,
- const struct GNUNET_ATS_Information *atsi,
- uint32_t atsi_count)
+ const struct GNUNET_MessageHeader *msg)
{
const struct EncryptedMessage *m;
struct EncryptedMessage *pt; /* plaintext */
struct GNUNET_HashCode ph;
uint32_t snum;
struct GNUNET_TIME_Absolute t;
- struct GNUNET_CRYPTO_AesInitializationVector iv;
+ struct GNUNET_CRYPTO_SymmetricInitializationVector iv;
struct GNUNET_CRYPTO_AuthKey auth_key;
struct DeliverMessageContext dmc;
uint16_t size = ntohs (msg->size);
return;
}
m = (const struct EncryptedMessage *) msg;
- if (kx->status != KX_STATE_UP)
+ if (GNUNET_CORE_KX_STATE_UP != kx->status)
{
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop
1, GNUNET_NO);
return;
}
- if (0 == GNUNET_TIME_absolute_get_remaining (kx->foreign_key_expires).rel_value)
+ if (0 == GNUNET_TIME_absolute_get_remaining (kx->foreign_key_expires).rel_value_us)
{
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Session to peer `%s' went down due to key expiration (should not happen)\n"),
+ GNUNET_i2s (&kx->peer));
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop ("# sessions terminated by key expiration"),
1, GNUNET_NO);
GSC_SESSIONS_end (&kx->peer);
- kx->status = KX_STATE_KEY_SENT;
+ if (GNUNET_SCHEDULER_NO_TASK != kx->keep_alive_task)
+ {
+ GNUNET_SCHEDULER_cancel (kx->keep_alive_task);
+ kx->keep_alive_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ kx->status = GNUNET_CORE_KX_STATE_KEY_SENT;
+ monitor_notify_all (kx);
send_key (kx);
return;
}
if (0 != memcmp (&ph, &m->hmac, sizeof (struct GNUNET_HashCode)))
{
/* checksum failed */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Failed checksum validation for a message from `%s'\n",
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed checksum validation for a message from `%s'\n",
GNUNET_i2s (&kx->peer));
return;
}
do_decrypt (kx, &iv, &m->sequence_number, &buf[ENCRYPTED_HEADER_SIZE],
size - ENCRYPTED_HEADER_SIZE))
return;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Decrypted %u bytes from %s\n",
- size - ENCRYPTED_HEADER_SIZE, GNUNET_i2s (&kx->peer));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Decrypted %u bytes from %s\n",
+ size - ENCRYPTED_HEADER_SIZE,
+ GNUNET_i2s (&kx->peer));
pt = (struct EncryptedMessage *) buf;
/* validate sequence number */
/* check timestamp */
t = GNUNET_TIME_absolute_ntoh (pt->timestamp);
- if (GNUNET_TIME_absolute_get_duration (t).rel_value >
- MAX_MESSAGE_AGE.rel_value)
+ if (GNUNET_TIME_absolute_get_duration (t).rel_value_us >
+ MAX_MESSAGE_AGE.rel_value_us)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Message received far too old (%s). Content ignored.\n",
- GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_duration (t), GNUNET_YES));
+ GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_duration (t),
+ GNUNET_YES));
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop
("# bytes dropped (ancient message)"), size,
update_timeout (kx);
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop ("# bytes of payload decrypted"),
- size - sizeof (struct EncryptedMessage), GNUNET_NO);
- dmc.atsi = atsi;
+ size - sizeof (struct EncryptedMessage),
+ GNUNET_NO);
dmc.kx = kx;
- dmc.atsi_count = atsi_count;
dmc.peer = &kx->peer;
if (GNUNET_OK !=
GNUNET_SERVER_mst_receive (mst, &dmc,
&buf[sizeof (struct EncryptedMessage)],
size - sizeof (struct EncryptedMessage),
- GNUNET_YES, GNUNET_NO))
+ GNUNET_YES,
+ GNUNET_NO))
GNUNET_break_op (0);
}
* @param m the message
*/
static int
-deliver_message (void *cls, void *client, const struct GNUNET_MessageHeader *m)
+deliver_message (void *cls,
+ void *client,
+ const struct GNUNET_MessageHeader *m)
{
struct DeliverMessageContext *dmc = client;
- if (KX_STATE_UP != dmc->kx->status)
+ if (GNUNET_CORE_KX_STATE_UP != dmc->kx->status)
{
GNUNET_STATISTICS_update (GSC_stats,
gettext_noop
GSC_SESSIONS_set_typemap (dmc->peer, m);
return GNUNET_OK;
default:
- GSC_CLIENTS_deliver_message (dmc->peer, dmc->atsi, dmc->atsi_count, m,
+ GSC_CLIENTS_deliver_message (dmc->peer, m,
ntohs (m->size),
GNUNET_CORE_OPTION_SEND_FULL_INBOUND);
- GSC_CLIENTS_deliver_message (dmc->peer, dmc->atsi, dmc->atsi_count, m,
+ GSC_CLIENTS_deliver_message (dmc->peer, m,
sizeof (struct GNUNET_MessageHeader),
GNUNET_CORE_OPTION_SEND_HDR_INBOUND);
}
current_ekm.purpose.size = htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
sizeof (struct GNUNET_TIME_AbsoluteNBO) +
sizeof (struct GNUNET_TIME_AbsoluteNBO) +
- sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded) +
- sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded));
+ sizeof (struct GNUNET_CRYPTO_EcdhePublicKey) +
+ sizeof (struct GNUNET_PeerIdentity));
current_ekm.creation_time = GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
- current_ekm.expiration_time = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_add (REKEY_FREQUENCY,
- REKEY_TOLERANCE)));
- GNUNET_CRYPTO_ecc_key_get_public (my_ephemeral_key,
- ¤t_ekm.ephemeral_key);
- current_ekm.origin_public_key = my_public_key;
+ if (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (GSC_cfg,
+ "core",
+ "USE_EPHEMERAL_KEYS"))
+ {
+ current_ekm.expiration_time = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_add (REKEY_FREQUENCY,
+ REKEY_TOLERANCE)));
+ }
+ else
+ {
+ current_ekm.expiration_time = GNUNET_TIME_absolute_hton (GNUNET_TIME_UNIT_FOREVER_ABS);
+ }
+ GNUNET_CRYPTO_ecdhe_key_get_public (my_ephemeral_key,
+ ¤t_ekm.ephemeral_key);
+ current_ekm.origin_identity = GSC_my_identity;
GNUNET_assert (GNUNET_OK ==
- GNUNET_CRYPTO_ecc_sign (my_private_key,
+ GNUNET_CRYPTO_eddsa_sign (my_private_key,
¤t_ekm.purpose,
¤t_ekm.signature));
}
&do_rekey,
NULL);
if (NULL != my_ephemeral_key)
- GNUNET_CRYPTO_ecc_key_free (my_ephemeral_key);
- my_ephemeral_key = GNUNET_CRYPTO_ecc_key_create ();
+ GNUNET_free (my_ephemeral_key);
+ my_ephemeral_key = GNUNET_CRYPTO_ecdhe_key_create ();
GNUNET_assert (NULL != my_ephemeral_key);
sign_ephemeral_key ();
for (pos = kx_head; NULL != pos; pos = pos->next)
{
- pos->status = KX_STATE_REKEY_SENT;
+ if (GNUNET_CORE_KX_STATE_UP == pos->status)
+ {
+ pos->status = GNUNET_CORE_KX_STATE_REKEY_SENT;
+ monitor_notify_all (pos);
+ derive_session_keys (pos);
+ }
+ if (GNUNET_CORE_KX_STATE_DOWN == pos->status)
+ {
+ pos->status = GNUNET_CORE_KX_STATE_KEY_SENT;
+ monitor_notify_all (pos);
+ }
+ monitor_notify_all (pos);
send_key (pos);
}
}
* Initialize KX subsystem.
*
* @param pk private key to use for the peer
- * @return GNUNET_OK on success, GNUNET_SYSERR on failure
+ * @param server the server of the CORE service
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
int
-GSC_KX_init (struct GNUNET_CRYPTO_EccPrivateKey *pk)
+GSC_KX_init (struct GNUNET_CRYPTO_EddsaPrivateKey *pk,
+ struct GNUNET_SERVER_Handle *server)
{
- GNUNET_assert (NULL != pk);
+ nc = GNUNET_SERVER_notification_context_create (server,
+ 1);
my_private_key = pk;
- GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
- GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
- &GSC_my_identity.hashPubKey);
- if (GNUNET_YES ==
- GNUNET_CONFIGURATION_get_value_yesno (GSC_cfg,
- "core",
- "USE_EPHEMERAL_KEYS"))
+ GNUNET_CRYPTO_eddsa_key_get_public (my_private_key,
+ &GSC_my_identity.public_key);
+ my_ephemeral_key = GNUNET_CRYPTO_ecdhe_key_create ();
+ if (NULL == my_ephemeral_key)
{
- my_ephemeral_key = GNUNET_CRYPTO_ecc_key_create ();
- if (NULL == my_ephemeral_key)
- {
- GNUNET_break (0);
- GNUNET_CRYPTO_ecc_key_free (my_private_key);
- my_private_key = NULL;
- return GNUNET_SYSERR;
- }
- sign_ephemeral_key ();
- rekey_task = GNUNET_SCHEDULER_add_delayed (REKEY_FREQUENCY,
- &do_rekey,
- NULL);
- }
- else
- {
- my_ephemeral_key = my_private_key;
- sign_ephemeral_key ();
+ GNUNET_break (0);
+ GNUNET_free (my_private_key);
+ my_private_key = NULL;
+ return GNUNET_SYSERR;
}
+ sign_ephemeral_key ();
+ rekey_task = GNUNET_SCHEDULER_add_delayed (REKEY_FREQUENCY,
+ &do_rekey,
+ NULL);
mst = GNUNET_SERVER_mst_create (&deliver_message, NULL);
return GNUNET_OK;
}
GNUNET_SCHEDULER_cancel (rekey_task);
rekey_task = GNUNET_SCHEDULER_NO_TASK;
}
- if ( (NULL != my_ephemeral_key) &&
- (my_ephemeral_key != my_private_key) )
+ if (NULL != my_ephemeral_key)
{
- GNUNET_CRYPTO_ecc_key_free (my_ephemeral_key);
+ GNUNET_free (my_ephemeral_key);
my_ephemeral_key = NULL;
}
if (NULL != my_private_key)
{
- GNUNET_CRYPTO_ecc_key_free (my_private_key);
+ GNUNET_free (my_private_key);
my_private_key = NULL;
}
if (NULL != mst)
GNUNET_SERVER_mst_destroy (mst);
mst = NULL;
}
+ if (NULL != nc)
+ {
+ GNUNET_SERVER_notification_context_destroy (nc);
+ nc = NULL;
+ }
+}
+
+
+/**
+ * Handle #GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS request. For this
+ * request type, the client does not have to have transmitted an INIT
+ * request. All current peers are returned, regardless of which
+ * message types they accept.
+ *
+ * @param cls unused
+ * @param client client sending the iteration request
+ * @param message iteration request message
+ */
+void
+GSC_KX_handle_client_monitor_peers (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct MonitorNotifyMessage done_msg;
+ struct GSC_KeyExchangeInfo *kx;
+
+ GNUNET_SERVER_notification_context_add (nc,
+ client);
+ for (kx = kx_head; NULL != kx; kx = kx->next)
+ monitor_notify (client, kx);
+ done_msg.header.size = htons (sizeof (struct MonitorNotifyMessage));
+ done_msg.header.type = htons (GNUNET_MESSAGE_TYPE_CORE_MONITOR_NOTIFY);
+ done_msg.state = htonl ((uint32_t) GNUNET_CORE_KX_ITERATION_FINISHED);
+ memset (&done_msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
+ done_msg.timeout = GNUNET_TIME_absolute_hton (GNUNET_TIME_UNIT_FOREVER_ABS);
+ GNUNET_SERVER_notification_context_unicast (nc,
+ client,
+ &done_msg.header,
+ GNUNET_NO);
}
+
/* end of gnunet-service-core_kx.c */
projects / oweals / gnunet.git / blobdiff