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Merge remote branch 'origin/maint-0.2.2'

Browse Source 
Conflicts:
	src/common/tortls.c
This commit is contained in:
Nick Mathewson 2010-10-21 16:23:01 -04:00
commit 17fdde3d92
8 changed files with 263 additions and 70 deletions
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138
src/common/tortls.c
View File

@ -200,9 +200,17 @@ static X509* tor_tls_create_certificate(crypto_pk_env_t *rsa,
const char *cname_sign,
unsigned int lifetime);
/** Global tls context. We keep it here because nobody else needs to
* touch it. */
static tor_tls_context_t *global_tls_context = NULL;
static int tor_tls_context_init_one(tor_tls_context_t **ppcontext,
crypto_pk_env_t *identity,
unsigned int key_lifetime);
static tor_tls_context_t *tor_tls_context_new(crypto_pk_env_t *identity,
unsigned int key_lifetime);
/** Global TLS contexts. We keep them here because nobody else needs
* to touch them. */
static tor_tls_context_t *server_tls_context = NULL;
static tor_tls_context_t *client_tls_context = NULL;
/** True iff tor_tls_init() has been called. */
static int tls_library_is_initialized = 0;
@ -448,9 +456,15 @@ tor_tls_init(void)
void
tor_tls_free_all(void)
{
if (global_tls_context) {
tor_tls_context_decref(global_tls_context);
global_tls_context = NULL;
if (server_tls_context) {
tor_tls_context_t *ctx = server_tls_context;
server_tls_context = NULL;
tor_tls_context_decref(ctx);
}
if (client_tls_context) {
tor_tls_context_t *ctx = client_tls_context;
client_tls_context = NULL;
tor_tls_context_decref(ctx);
}
if (!HT_EMPTY(&tlsmap_root)) {
log_warn(LD_MM, "Still have entries in the tlsmap at shutdown.");
@ -637,15 +651,97 @@ tor_tls_context_incref(tor_tls_context_t *ctx)
++ctx->refcnt;
}
/** Create a new TLS context for use with Tor TLS handshakes.
* <b>identity</b> should be set to the identity key used to sign the
* certificate.
/** Create new global client and server TLS contexts.
*
* If <b>server_identity</b> is NULL, this will not generate a server
* TLS context. If <b>is_public_server</b> is non-zero, this will use
* the same TLS context for incoming and outgoing connections, and
* ignore <b>client_identity</b>. */
int
tor_tls_context_init(int is_public_server,
crypto_pk_env_t *client_identity,
crypto_pk_env_t *server_identity,
unsigned int key_lifetime)
{
int rv1 = 0;
int rv2 = 0;
if (is_public_server) {
tor_tls_context_t *new_ctx;
tor_tls_context_t *old_ctx;
tor_assert(server_identity != NULL);
rv1 = tor_tls_context_init_one(&server_tls_context,
server_identity,
key_lifetime);
if (rv1 >= 0) {
new_ctx = server_tls_context;
tor_tls_context_incref(new_ctx);
old_ctx = client_tls_context;
client_tls_context = new_ctx;
if (old_ctx != NULL) {
tor_tls_context_decref(old_ctx);
}
}
} else {
if (server_identity != NULL) {
rv1 = tor_tls_context_init_one(&server_tls_context,
server_identity,
key_lifetime);
} else {
tor_tls_context_t *old_ctx = server_tls_context;
server_tls_context = NULL;
if (old_ctx != NULL) {
tor_tls_context_decref(old_ctx);
}
}
rv2 = tor_tls_context_init_one(&client_tls_context,
client_identity,
key_lifetime);
}
return MIN(rv1, rv2);
}
/** Create a new global TLS context.
*
* You can call this function multiple times. Each time you call it,
* it generates new certificates; all new connections will use
* the new SSL context.
*/
int
static int
tor_tls_context_init_one(tor_tls_context_t **ppcontext,
crypto_pk_env_t *identity,
unsigned int key_lifetime)
{
tor_tls_context_t *new_ctx = tor_tls_context_new(identity,
key_lifetime);
tor_tls_context_t *old_ctx = *ppcontext;
if (new_ctx != NULL) {
*ppcontext = new_ctx;
/* Free the old context if one existed. */
if (old_ctx != NULL) {
/* This is safe even if there are open connections: we reference-
* count tor_tls_context_t objects. */
tor_tls_context_decref(old_ctx);
}
}
return ((new_ctx != NULL) ? 0 : -1);
}
/** Create a new TLS context for use with Tor TLS handshakes.
* <b>identity</b> should be set to the identity key used to sign the
* certificate.
*/
static tor_tls_context_t *
tor_tls_context_new(crypto_pk_env_t *identity, unsigned int key_lifetime)
{
crypto_pk_env_t *rsa = NULL;
@ -740,18 +836,12 @@ tor_tls_context_new(crypto_pk_env_t *identity, unsigned int key_lifetime)
always_accept_verify_cb);
/* let us realloc bufs that we're writing from */
SSL_CTX_set_mode(result->ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
/* Free the old context if one exists. */
if (global_tls_context) {
/* This is safe even if there are open connections: we reference-
* count tor_tls_context_t objects. */
tor_tls_context_decref(global_tls_context);
}
global_tls_context = result;
if (rsa)
crypto_free_pk_env(rsa);
tor_free(nickname);
tor_free(nn2);
return 0;
return result;
error:
tls_log_errors(NULL, LOG_WARN, LD_NET, "creating TLS context");
@ -767,7 +857,7 @@ tor_tls_context_new(crypto_pk_env_t *identity, unsigned int key_lifetime)
X509_free(cert);
if (idcert)
X509_free(idcert);
return -1;
return NULL;
}
#ifdef V2_HANDSHAKE_SERVER
@ -952,9 +1042,11 @@ tor_tls_new(int sock, int isServer)
{
BIO *bio = NULL;
tor_tls_t *result = tor_malloc_zero(sizeof(tor_tls_t));
tor_tls_context_t *context = isServer ? server_tls_context :
client_tls_context;
tor_assert(global_tls_context); /* make sure somebody made it first */
if (!(result->ssl = SSL_new(global_tls_context->ctx))) {
tor_assert(context); /* make sure somebody made it first */
if (!(result->ssl = SSL_new(context->ctx))) {
tls_log_errors(NULL, LOG_WARN, LD_NET, "creating SSL object");
tor_free(result);
return NULL;
@ -994,8 +1086,8 @@ tor_tls_new(int sock, int isServer)
}
HT_INSERT(tlsmap, &tlsmap_root, result);
SSL_set_bio(result->ssl, bio, bio);
tor_tls_context_incref(global_tls_context);
result->context = global_tls_context;
tor_tls_context_incref(context);
result->context = context;
result->state = TOR_TLS_ST_HANDSHAKE;
result->isServer = isServer;
result->wantwrite_n = 0;

5
src/common/tortls.h
View File

@ -50,7 +50,10 @@ typedef struct tor_tls_t tor_tls_t;
const char *tor_tls_err_to_string(int err);
void tor_tls_free_all(void);
int tor_tls_context_new(crypto_pk_env_t *rsa, unsigned int key_lifetime);
int tor_tls_context_init(int is_public_server,
crypto_pk_env_t *client_identity,
crypto_pk_env_t *server_identity,
unsigned int key_lifetime);
tor_tls_t *tor_tls_new(int sock, int is_server);
void tor_tls_set_logged_address(tor_tls_t *tls, const char *address);
void tor_tls_set_renegotiate_callback(tor_tls_t *tls,

5
src/or/connection_or.c
View File

@ -1142,6 +1142,9 @@ connection_or_check_valid_tls_handshake(or_connection_t *conn,
started_here ? conn->_base.address :
safe_str_client(conn->_base.address);
const char *conn_type = started_here ? "outgoing" : "incoming";
crypto_pk_env_t *our_identity =
started_here ? get_tlsclient_identity_key() :
get_server_identity_key();
int has_cert = 0, has_identity=0;
check_no_tls_errors();
@ -1179,7 +1182,7 @@ connection_or_check_valid_tls_handshake(or_connection_t *conn,
if (identity_rcvd) {
has_identity = 1;
crypto_pk_get_digest(identity_rcvd, digest_rcvd_out);
if (crypto_pk_cmp_keys(get_identity_key(), identity_rcvd)<0) {
if (crypto_pk_cmp_keys(our_identity, identity_rcvd)<0) {
conn->circ_id_type = CIRC_ID_TYPE_LOWER;
} else {
conn->circ_id_type = CIRC_ID_TYPE_HIGHER;

7
src/or/dirserv.c
View File

@ -1578,7 +1578,8 @@ dirserv_regenerate_directory(void)
{
char *new_directory=NULL;
if (dirserv_dump_directory_to_string(&new_directory, get_identity_key())) {
if (dirserv_dump_directory_to_string(&new_directory,
get_server_identity_key())) {
log_warn(LD_BUG, "Error creating directory.");
tor_free(new_directory);
return NULL;
@ -1608,7 +1609,7 @@ generate_runningrouters(void)
char digest[DIGEST_LEN];
char published[ISO_TIME_LEN+1];
size_t len;
crypto_pk_env_t *private_key = get_identity_key();
crypto_pk_env_t *private_key = get_server_identity_key();
char *identity_pkey; /* Identity key, DER64-encoded. */
size_t identity_pkey_len;
@ -2734,7 +2735,7 @@ generate_v2_networkstatus_opinion(void)
smartlist_t *routers = NULL;
digestmap_t *omit_as_sybil = NULL;
private_key = get_identity_key();
private_key = get_server_identity_key();
if (resolve_my_address(LOG_WARN, options, &addr, &hostname)<0) {
log_warn(LD_NET, "Couldn't resolve my hostname");

4
src/or/hibernate.c
View File

@ -522,7 +522,7 @@ accounting_set_wakeup_time(void)
uint64_t time_to_exhaust_bw;
int time_to_consider;
if (! identity_key_is_set()) {
if (! server_identity_key_is_set()) {
if (init_keys() < 0) {
log_err(LD_BUG, "Error initializing keys");
tor_assert(0);
@ -530,7 +530,7 @@ accounting_set_wakeup_time(void)
}
format_iso_time(buf, interval_start_time);
crypto_pk_get_digest(get_identity_key(), digest);
crypto_pk_get_digest(get_server_identity_key(), digest);
d_env = crypto_new_digest_env();
crypto_digest_add_bytes(d_env, buf, ISO_TIME_LEN);

14
src/or/main.c
View File

@ -1037,6 +1037,7 @@ run_scheduled_events(time_t now)
static int should_init_bridge_stats = 1;
static time_t time_to_retry_dns_init = 0;
or_options_t *options = get_options();
int is_server = server_mode(options);
int i;
int have_dir_info;
@ -1068,7 +1069,7 @@ run_scheduled_events(time_t now)
* shut down and restart all cpuworkers, and update the directory if
* necessary.
*/
if (server_mode(options) &&
if (is_server &&
get_onion_key_set_at()+MIN_ONION_KEY_LIFETIME < now) {
log_info(LD_GENERAL,"Rotating onion key.");
rotate_onion_key();
@ -1103,7 +1104,10 @@ run_scheduled_events(time_t now)
last_rotated_x509_certificate = now;
if (last_rotated_x509_certificate+MAX_SSL_KEY_LIFETIME < now) {
log_info(LD_GENERAL,"Rotating tls context.");
if (tor_tls_context_new(get_identity_key(), MAX_SSL_KEY_LIFETIME) < 0) {
if (tor_tls_context_init(public_server_mode(options),
get_tlsclient_identity_key(),
is_server ? get_server_identity_key() : NULL,
MAX_SSL_KEY_LIFETIME) < 0) {
log_warn(LD_BUG, "Error reinitializing TLS context");
/* XXX is it a bug here, that we just keep going? -RD */
}
@ -1386,7 +1390,7 @@ run_scheduled_events(time_t now)
/** 9. and if we're a server, check whether our DNS is telling stories to
* us. */
if (server_mode(options) && time_to_check_for_correct_dns < now) {
if (is_server && time_to_check_for_correct_dns < now) {
if (!time_to_check_for_correct_dns) {
time_to_check_for_correct_dns = now + 60 + crypto_rand_int(120);
} else {
@ -1660,7 +1664,7 @@ do_main_loop(void)
/* load the private keys, if we're supposed to have them, and set up the
* TLS context. */
if (! identity_key_is_set()) {
if (! client_identity_key_is_set()) {
if (init_keys() < 0) {
log_err(LD_BUG,"Error initializing keys; exiting");
return -1;
@ -2299,7 +2303,7 @@ do_list_fingerprint(void)
log_err(LD_BUG,"Error initializing keys; can't display fingerprint");
return -1;
}
if (!(k = get_identity_key())) {
if (!(k = get_server_identity_key())) {
log_err(LD_GENERAL,"Error: missing identity key.");
return -1;
}

150
src/or/router.c
View File

@ -51,11 +51,15 @@ static crypto_pk_env_t *onionkey=NULL;
/** Previous private onionskin decryption key: used to decode CREATE cells
* generated by clients that have an older version of our descriptor. */
static crypto_pk_env_t *lastonionkey=NULL;
/** Private "identity key": used to sign directory info and TLS
/** Private server "identity key": used to sign directory info and TLS
* certificates. Never changes. */
static crypto_pk_env_t *identitykey=NULL;
/** Digest of identitykey. */
static char identitykey_digest[DIGEST_LEN];
static crypto_pk_env_t *server_identitykey=NULL;
/** Digest of server_identitykey. */
static char server_identitykey_digest[DIGEST_LEN];
/** Private client "identity key": used to sign bridges' and clients'
* outbound TLS certificates. Regenerated on startup and on IP address
* change. */
static crypto_pk_env_t *client_identitykey=NULL;
/** Signing key used for v3 directory material; only set for authorities. */
static crypto_pk_env_t *authority_signing_key = NULL;
/** Key certificate to authenticate v3 directory material; only set for
@ -125,31 +129,78 @@ get_onion_key_set_at(void)
return onionkey_set_at;
}
/** Set the current identity key to k.
/** Set the current server identity key to <b>k</b>.
*/
void
set_identity_key(crypto_pk_env_t *k)
set_server_identity_key(crypto_pk_env_t *k)
{
crypto_free_pk_env(identitykey);
identitykey = k;
crypto_pk_get_digest(identitykey, identitykey_digest);
crypto_free_pk_env(server_identitykey);
server_identitykey = k;
crypto_pk_get_digest(server_identitykey, server_identitykey_digest);
}
/** Returns the current identity key; requires that the identity key has been
* set.
/** Make sure that we have set up our identity keys to match or not match as
* appropriate, and die with an assertion if we have not. */
static void
assert_identity_keys_ok(void)
{
tor_assert(client_identitykey);
if (public_server_mode(get_options())) {
/* assert that we have set the client and server keys to be equal */
tor_assert(server_identitykey);
tor_assert(0==crypto_pk_cmp_keys(client_identitykey, server_identitykey));
} else {
/* assert that we have set the client and server keys to be unequal */
if (server_identitykey)
tor_assert(0!=crypto_pk_cmp_keys(client_identitykey,
server_identitykey));
}
}
/** Returns the current server identity key; requires that the key has
* been set, and that we are running as a Tor server.
*/
crypto_pk_env_t *
get_identity_key(void)
get_server_identity_key(void)
{
tor_assert(identitykey);
return identitykey;
tor_assert(server_identitykey);
tor_assert(server_mode(get_options()));
assert_identity_keys_ok();
return server_identitykey;
}
/** Return true iff the identity key has been set. */
/** Return true iff the server identity key has been set. */
int
identity_key_is_set(void)
server_identity_key_is_set(void)
{
return identitykey != NULL;
return server_identitykey != NULL;
}
/** Set the current client identity key to <b>k</b>.
*/
void
set_client_identity_key(crypto_pk_env_t *k)
{
crypto_free_pk_env(client_identitykey);
client_identitykey = k;
}
/** Returns the current client identity key for use on outgoing TLS
* connections; requires that the key has been set.
*/
crypto_pk_env_t *
get_tlsclient_identity_key(void)
{
tor_assert(client_identitykey);
assert_identity_keys_ok();
return client_identitykey;
}
/** Return true iff the client identity key has been set. */
int
client_identity_key_is_set(void)
{
return client_identitykey != NULL;
}
/** Return the key certificate for this v3 (voting) authority, or NULL
@ -472,9 +523,12 @@ init_keys(void)
crypto_free_pk_env(prkey);
return -1;
}
set_identity_key(prkey);
/* Create a TLS context; default the client nickname to "client". */
if (tor_tls_context_new(get_identity_key(), MAX_SSL_KEY_LIFETIME) < 0) {
set_client_identity_key(prkey);
/* Create a TLS context. */
if (tor_tls_context_init(0,
get_tlsclient_identity_key(),
NULL,
MAX_SSL_KEY_LIFETIME) < 0) {
log_err(LD_GENERAL,"Error creating TLS context for Tor client.");
return -1;
}
@ -509,13 +563,28 @@ init_keys(void)
}
}
/* 1. Read identity key. Make it if none is found. */
/* 1b. Read identity key. Make it if none is found. */
keydir = get_datadir_fname2("keys", "secret_id_key");
log_info(LD_GENERAL,"Reading/making identity key \"%s\"...",keydir);
prkey = init_key_from_file(keydir, 1, LOG_ERR);
tor_free(keydir);
if (!prkey) return -1;
set_identity_key(prkey);
set_server_identity_key(prkey);
/* 1c. If we are configured as a bridge, generate a client key;
* otherwise, set the server identity key as our client identity
* key. */
if (public_server_mode(options)) {
set_client_identity_key(prkey); /* set above */
} else {
if (!(prkey = crypto_new_pk_env()))
return -1;
if (crypto_pk_generate_key(prkey)) {
crypto_free_pk_env(prkey);
return -1;
}
set_client_identity_key(prkey);
}
/* 2. Read onion key. Make it if none is found. */
keydir = get_datadir_fname2("keys", "secret_onion_key");
@ -552,7 +621,10 @@ init_keys(void)
tor_free(keydir);
/* 3. Initialize link key and TLS context. */
if (tor_tls_context_new(get_identity_key(), MAX_SSL_KEY_LIFETIME) < 0) {
if (tor_tls_context_init(public_server_mode(options),
get_tlsclient_identity_key(),
get_server_identity_key(),
MAX_SSL_KEY_LIFETIME) < 0) {
log_err(LD_GENERAL,"Error initializing TLS context");
return -1;
}
@ -563,7 +635,8 @@ init_keys(void)
const char *m = NULL;
routerinfo_t *ri;
/* We need to add our own fingerprint so it gets recognized. */
if (dirserv_add_own_fingerprint(options->Nickname, get_identity_key())) {
if (dirserv_add_own_fingerprint(options->Nickname,
get_server_identity_key())) {
log_err(LD_GENERAL,"Error adding own fingerprint to approved set");
return -1;
}
@ -584,7 +657,8 @@ init_keys(void)
/* 5. Dump fingerprint to 'fingerprint' */
keydir = get_datadir_fname("fingerprint");
log_info(LD_GENERAL,"Dumping fingerprint to \"%s\"...",keydir);
if (crypto_pk_get_fingerprint(get_identity_key(), fingerprint, 0)<0) {
if (crypto_pk_get_fingerprint(get_server_identity_key(),
fingerprint, 0) < 0) {
log_err(LD_GENERAL,"Error computing fingerprint");
tor_free(keydir);
return -1;
@ -622,7 +696,7 @@ init_keys(void)
return -1;
}
/* 6b. [authdirserver only] add own key to approved directories. */
crypto_pk_get_digest(get_identity_key(), digest);
crypto_pk_get_digest(get_server_identity_key(), digest);
type = ((options->V1AuthoritativeDir ? V1_AUTHORITY : NO_AUTHORITY) |
(options->V2AuthoritativeDir ? V2_AUTHORITY : NO_AUTHORITY) |
(options->V3AuthoritativeDir ? V3_AUTHORITY : NO_AUTHORITY) |
@ -981,6 +1055,15 @@ server_mode(or_options_t *options)
return (options->ORPort != 0 || options->ORListenAddress);
}
/** Return true iff we are trying to be a non-bridge server.
*/
int
public_server_mode(or_options_t *options)
{
if (!server_mode(options)) return 0;
return (!options->BridgeRelay);
}
/** Return true iff the combination of options in <b>options</b> and parameters
* in the consensus mean that we don't want to allow exits from circuits
* we got from addresses not known to be servers. */
@ -1168,11 +1251,12 @@ router_my_exit_policy_is_reject_star(void)
}
/** Return true iff I'm a server and <b>digest</b> is equal to
* my identity digest. */
* my server identity key digest. */
int
router_digest_is_me(const char *digest)
{
return identitykey && !memcmp(identitykey_digest, digest, DIGEST_LEN);
return (server_identitykey &&
!memcmp(server_identitykey_digest, digest, DIGEST_LEN));
}
/** Return true iff I'm a server and <b>digest</b> is equal to
@ -1311,7 +1395,7 @@ router_rebuild_descriptor(int force)
ri->cache_info.published_on = time(NULL);
ri->onion_pkey = crypto_pk_dup_key(get_onion_key()); /* must invoke from
* main thread */
ri->identity_pkey = crypto_pk_dup_key(get_identity_key());
ri->identity_pkey = crypto_pk_dup_key(get_server_identity_key());
if (crypto_pk_get_digest(ri->identity_pkey,
ri->cache_info.identity_digest)<0) {
routerinfo_free(ri);
@ -1406,7 +1490,8 @@ router_rebuild_descriptor(int force)
ei_size = options->ExtraInfoStatistics ? MAX_EXTRAINFO_UPLOAD_SIZE : 8192;
ei->cache_info.signed_descriptor_body = tor_malloc(ei_size);
if (extrainfo_dump_to_string(ei->cache_info.signed_descriptor_body,
ei_size, ei, get_identity_key()) < 0) {
ei_size, ei,
get_server_identity_key()) < 0) {
log_warn(LD_BUG, "Couldn't generate extra-info descriptor.");
routerinfo_free(ri);
extrainfo_free(ei);
@ -1423,7 +1508,7 @@ router_rebuild_descriptor(int force)
DIGEST_LEN);
ri->cache_info.signed_descriptor_body = tor_malloc(8192);
if (router_dump_router_to_string(ri->cache_info.signed_descriptor_body, 8192,
ri, get_identity_key())<0) {
ri, get_server_identity_key()) < 0) {
log_warn(LD_BUG, "Couldn't generate router descriptor.");
routerinfo_free(ri);
extrainfo_free(ei);
@ -2175,7 +2260,8 @@ router_free_all(void)
{
crypto_free_pk_env(onionkey);
crypto_free_pk_env(lastonionkey);
crypto_free_pk_env(identitykey);
crypto_free_pk_env(server_identitykey);
crypto_free_pk_env(client_identitykey);
tor_mutex_free(key_lock);
routerinfo_free(desc_routerinfo);
extrainfo_free(desc_extrainfo);

10
src/or/router.h
View File

@ -14,9 +14,12 @@
crypto_pk_env_t *get_onion_key(void);
time_t get_onion_key_set_at(void);
void set_identity_key(crypto_pk_env_t *k);
crypto_pk_env_t *get_identity_key(void);
int identity_key_is_set(void);
void set_server_identity_key(crypto_pk_env_t *k);
crypto_pk_env_t *get_server_identity_key(void);
int server_identity_key_is_set(void);
void set_client_identity_key(crypto_pk_env_t *k);
crypto_pk_env_t *get_tlsclient_identity_key(void);
int client_identity_key_is_set(void);
authority_cert_t *get_my_v3_authority_cert(void);
crypto_pk_env_t *get_my_v3_authority_signing_key(void);
authority_cert_t *get_my_v3_legacy_cert(void);
@ -48,6 +51,7 @@ int authdir_mode_tests_reachability(or_options_t *options);
int authdir_mode_bridge(or_options_t *options);
int server_mode(or_options_t *options);
int public_server_mode(or_options_t *options);
int advertised_server_mode(void);
int proxy_mode(or_options_t *options);
void consider_publishable_server(int force);