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Import Upstream version 1.0.10

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This commit is contained in:
Guus Sliepen 2019-08-26 13:44:38 +02:00
parent 5d002cc66a
commit fa871d431d
152 changed files with 15479 additions and 25408 deletions
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164
src/protocol_key.c
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@ -1,7 +1,7 @@
/*
protocol_key.c -- handle the meta-protocol, key exchange
Copyright (C) 1999-2005 Ivo Timmermans,
2000-2008 Guus Sliepen <guus@tinc-vpn.org>
2000-2009 Guus Sliepen <guus@tinc-vpn.org>
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
@ -13,17 +13,16 @@
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: protocol_key.c 1595 2008-12-22 20:27:52Z guus $
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "system.h"
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include "avl_tree.h"
#include "connection.h"
@ -37,29 +36,23 @@
bool mykeyused = false;
bool send_key_changed(connection_t *c, const node_t *n)
{
cp();
bool send_key_changed() {
/* Only send this message if some other daemon requested our key previously.
This reduces unnecessary key_changed broadcasts.
*/
if(n == myself && !mykeyused)
if(!mykeyused)
return true;
return send_request(c, "%d %lx %s", KEY_CHANGED, random(), n->name);
return send_request(broadcast, "%d %x %s", KEY_CHANGED, rand(), myself->name);
}
bool key_changed_h(connection_t *c)
{
bool key_changed_h(connection_t *c) {
char name[MAX_STRING_SIZE];
node_t *n;
cp();
if(sscanf(c->buffer, "%*d %*x " MAX_STRING, name) != 1) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "KEY_CHANGED",
logger(LOG_ERR, "Got bad %s from %s (%s)", "KEY_CHANGED",
c->name, c->hostname);
return false;
}
@ -70,7 +63,7 @@ bool key_changed_h(connection_t *c)
n = lookup_node(name);
if(!n) {
logger(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist"),
logger(LOG_ERR, "Got %s from %s (%s) origin %s which does not exist",
"KEY_CHANGED", c->name, c->hostname, name);
return false;
}
@ -86,23 +79,17 @@ bool key_changed_h(connection_t *c)
return true;
}
bool send_req_key(connection_t *c, const node_t *from, const node_t *to)
{
cp();
return send_request(c, "%d %s %s", REQ_KEY, from->name, to->name);
bool send_req_key(node_t *to) {
return send_request(to->nexthop->connection, "%d %s %s", REQ_KEY, myself->name, to->name);
}
bool req_key_h(connection_t *c)
{
bool req_key_h(connection_t *c) {
char from_name[MAX_STRING_SIZE];
char to_name[MAX_STRING_SIZE];
node_t *from, *to;
cp();
if(sscanf(c->buffer, "%*d " MAX_STRING " " MAX_STRING, from_name, to_name) != 2) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "REQ_KEY", c->name,
logger(LOG_ERR, "Got bad %s from %s (%s)", "REQ_KEY", c->name,
c->hostname);
return false;
}
@ -110,7 +97,7 @@ bool req_key_h(connection_t *c)
from = lookup_node(from_name);
if(!from) {
logger(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist in our connection list"),
logger(LOG_ERR, "Got %s from %s (%s) origin %s which does not exist in our connection list",
"REQ_KEY", c->name, c->hostname, from_name);
return false;
}
@ -118,7 +105,7 @@ bool req_key_h(connection_t *c)
to = lookup_node(to_name);
if(!to) {
logger(LOG_ERR, _("Got %s from %s (%s) destination %s which does not exist in our connection list"),
logger(LOG_ERR, "Got %s from %s (%s) destination %s which does not exist in our connection list",
"REQ_KEY", c->name, c->hostname, to_name);
return false;
}
@ -126,57 +113,69 @@ bool req_key_h(connection_t *c)
/* Check if this key request is for us */
if(to == myself) { /* Yes, send our own key back */
mykeyused = true;
from->received_seqno = 0;
memset(from->late, 0, sizeof(from->late));
send_ans_key(c, myself, from);
send_ans_key(from);
} else {
if(tunnelserver)
return false;
if(!to->status.reachable) {
logger(LOG_WARNING, _("Got %s from %s (%s) destination %s which is not reachable"),
logger(LOG_WARNING, "Got %s from %s (%s) destination %s which is not reachable",
"REQ_KEY", c->name, c->hostname, to_name);
return true;
}
send_req_key(to->nexthop->connection, from, to);
send_request(to->nexthop->connection, "%s", c->buffer);
}
return true;
}
bool send_ans_key(connection_t *c, const node_t *from, const node_t *to)
{
bool send_ans_key(node_t *to) {
char *key;
cp();
// Set key parameters
to->incipher = myself->incipher;
to->inkeylength = myself->inkeylength;
to->indigest = myself->indigest;
to->inmaclength = myself->inmaclength;
to->incompression = myself->incompression;
key = alloca(2 * from->keylength + 1);
bin2hex(from->key, key, from->keylength);
key[from->keylength * 2] = '\0';
// Allocate memory for key
to->inkey = xrealloc(to->inkey, to->inkeylength);
return send_request(c, "%d %s %s %s %d %d %d %d", ANS_KEY,
from->name, to->name, key,
from->cipher ? from->cipher->nid : 0,
from->digest ? from->digest->type : 0, from->maclength,
from->compression);
// Create a new key
RAND_pseudo_bytes((unsigned char *)to->inkey, to->inkeylength);
if(to->incipher)
EVP_DecryptInit_ex(&to->inctx, to->incipher, NULL, (unsigned char *)to->inkey, (unsigned char *)to->inkey + to->incipher->key_len);
// Reset sequence number and late packet window
mykeyused = true;
to->received_seqno = 0;
memset(to->late, 0, sizeof(to->late));
// Convert to hexadecimal and send
key = alloca(2 * to->inkeylength + 1);
bin2hex(to->inkey, key, to->inkeylength);
key[to->inkeylength * 2] = '\0';
return send_request(to->nexthop->connection, "%d %s %s %s %d %d %d %d", ANS_KEY,
myself->name, to->name, key,
to->incipher ? to->incipher->nid : 0,
to->indigest ? to->indigest->type : 0, to->inmaclength,
to->incompression);
}
bool ans_key_h(connection_t *c)
{
bool ans_key_h(connection_t *c) {
char from_name[MAX_STRING_SIZE];
char to_name[MAX_STRING_SIZE];
char key[MAX_STRING_SIZE];
int cipher, digest, maclength, compression;
node_t *from, *to;
cp();
if(sscanf(c->buffer, "%*d "MAX_STRING" "MAX_STRING" "MAX_STRING" %d %d %d %d",
from_name, to_name, key, &cipher, &digest, &maclength,
&compression) != 7) {
logger(LOG_ERR, _("Got bad %s from %s (%s)"), "ANS_KEY", c->name,
logger(LOG_ERR, "Got bad %s from %s (%s)", "ANS_KEY", c->name,
c->hostname);
return false;
}
@ -184,7 +183,7 @@ bool ans_key_h(connection_t *c)
from = lookup_node(from_name);
if(!from) {
logger(LOG_ERR, _("Got %s from %s (%s) origin %s which does not exist in our connection list"),
logger(LOG_ERR, "Got %s from %s (%s) origin %s which does not exist in our connection list",
"ANS_KEY", c->name, c->hostname, from_name);
return false;
}
@ -192,7 +191,7 @@ bool ans_key_h(connection_t *c)
to = lookup_node(to_name);
if(!to) {
logger(LOG_ERR, _("Got %s from %s (%s) destination %s which does not exist in our connection list"),
logger(LOG_ERR, "Got %s from %s (%s) destination %s which does not exist in our connection list",
"ANS_KEY", c->name, c->hostname, to_name);
return false;
}
@ -204,7 +203,7 @@ bool ans_key_h(connection_t *c)
return false;
if(!to->status.reachable) {
logger(LOG_WARNING, _("Got %s from %s (%s) destination %s which is not reachable"),
logger(LOG_WARNING, "Got %s from %s (%s) destination %s which is not reachable",
"ANS_KEY", c->name, c->hostname, to_name);
return true;
}
@ -213,77 +212,72 @@ bool ans_key_h(connection_t *c)
}
/* Update our copy of the origin's packet key */
from->outkey = xrealloc(from->outkey, strlen(key) / 2);
if(from->key)
free(from->key);
from->outkey = xstrdup(key);
from->outkeylength = strlen(key) / 2;
hex2bin(key, from->outkey, from->outkeylength);
from->key = xstrdup(key);
from->keylength = strlen(key) / 2;
hex2bin(from->key, from->key, from->keylength);
from->key[from->keylength] = '\0';
from->status.validkey = true;
from->status.waitingforkey = false;
from->sent_seqno = 0;
/* Check and lookup cipher and digest algorithms */
if(cipher) {
from->cipher = EVP_get_cipherbynid(cipher);
from->outcipher = EVP_get_cipherbynid(cipher);
if(!from->cipher) {
logger(LOG_ERR, _("Node %s (%s) uses unknown cipher!"), from->name,
if(!from->outcipher) {
logger(LOG_ERR, "Node %s (%s) uses unknown cipher!", from->name,
from->hostname);
return false;
}
if(from->keylength != from->cipher->key_len + from->cipher->iv_len) {
logger(LOG_ERR, _("Node %s (%s) uses wrong keylength!"), from->name,
if(from->outkeylength != from->outcipher->key_len + from->outcipher->iv_len) {
logger(LOG_ERR, "Node %s (%s) uses wrong keylength!", from->name,
from->hostname);
return false;
}
} else {
from->cipher = NULL;
from->outcipher = NULL;
}
from->maclength = maclength;
from->outmaclength = maclength;
if(digest) {
from->digest = EVP_get_digestbynid(digest);
from->outdigest = EVP_get_digestbynid(digest);
if(!from->digest) {
logger(LOG_ERR, _("Node %s (%s) uses unknown digest!"), from->name,
if(!from->outdigest) {
logger(LOG_ERR, "Node %s (%s) uses unknown digest!", from->name,
from->hostname);
return false;
}
if(from->maclength > from->digest->md_size || from->maclength < 0) {
logger(LOG_ERR, _("Node %s (%s) uses bogus MAC length!"),
if(from->outmaclength > from->outdigest->md_size || from->outmaclength < 0) {
logger(LOG_ERR, "Node %s (%s) uses bogus MAC length!",
from->name, from->hostname);
return false;
}
} else {
from->digest = NULL;
from->outdigest = NULL;
}
if(compression < 0 || compression > 11) {
logger(LOG_ERR, _("Node %s (%s) uses bogus compression level!"), from->name, from->hostname);
logger(LOG_ERR, "Node %s (%s) uses bogus compression level!", from->name, from->hostname);
return false;
}
from->compression = compression;
from->outcompression = compression;
if(from->cipher)
if(!EVP_EncryptInit_ex(&from->packet_ctx, from->cipher, NULL, (unsigned char *)from->key, (unsigned char *)from->key + from->cipher->key_len)) {
logger(LOG_ERR, _("Error during initialisation of key from %s (%s): %s"),
if(from->outcipher)
if(!EVP_EncryptInit_ex(&from->outctx, from->outcipher, NULL, (unsigned char *)from->outkey, (unsigned char *)from->outkey + from->outcipher->key_len)) {
logger(LOG_ERR, "Error during initialisation of key from %s (%s): %s",
from->name, from->hostname, ERR_error_string(ERR_get_error(), NULL));
return false;
}
from->status.validkey = true;
from->sent_seqno = 0;
if(from->options & OPTION_PMTU_DISCOVERY && !from->mtuprobes)
send_mtu_probe(from);
flush_queue(from);
return true;
}