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Add some asserts to get_{tlsclient|server}_identity_key

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We now require that:
  - Only actual servers should ever call get_server_identity_key
  - If you're being a client or bridge, the client and server keys should
    differ.
  - If you're being a public relay, the client and server keys
    should be the same.
This commit is contained in:
Nick Mathewson 2010-10-21 13:54:12 -04:00 • committed by Sebastian Hahn
parent 2a2301e411
commit dc557e8164
1 changed files with 21 additions and 1 deletions
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22
src/or/router.c
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@ -121,13 +121,32 @@ set_server_identity_key(crypto_pk_env_t *k)
crypto_pk_get_digest(server_identitykey, server_identitykey_digest);
}
/** 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.
* been set, and that we are running as a Tor server.
*/
crypto_pk_env_t *
get_server_identity_key(void)
{
tor_assert(server_identitykey);
tor_assert(server_mode(get_options()));
assert_identity_keys_ok();
return server_identitykey;
}
@ -155,6 +174,7 @@ crypto_pk_env_t *
get_tlsclient_identity_key(void)
{
tor_assert(client_identitykey);
assert_identity_keys_ok();
return client_identitykey;
}