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Fix bug in saving onion keys to disk when rotating; also survive short-term shutdowns better

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svn:r2206
This commit is contained in:
Nick Mathewson 2004-08-09 04:27:13 +00:00
parent e6c34ad071
commit 6141097f6e
1 changed files with 17 additions and 10 deletions
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27
src/or/router.c
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@ -98,8 +98,11 @@ crypto_pk_env_t *get_identity_key(void) {
void rotate_onion_key(void)
{
char fname[512];
char fname_prev[512];
crypto_pk_env_t *prkey;
sprintf(fname,"%s/keys/onion.key",get_data_directory(&options));
sprintf(fname,"%s/keys/secret_onion_key",get_data_directory(&options));
sprintf(fname_prev,"%s/keys/secret_onion_key.old",
get_data_directory(&options));
if (!(prkey = crypto_new_pk_env())) {
log(LOG_ERR, "Error creating crypto environment.");
goto error;
@ -108,6 +111,10 @@ void rotate_onion_key(void)
log(LOG_ERR, "Error generating onion key");
goto error;
}
if (file_status(fname) == FN_FILE) {
if (replace_file(fname, fname_prev))
goto error;
}
if (crypto_pk_write_private_key_to_filename(prkey, fname)) {
log(LOG_ERR, "Couldn't write generated key to %s.", fname);
goto error;
@ -144,15 +151,9 @@ static crypto_pk_env_t *
init_key_from_file_name_changed(const char *fname_old,
const char *fname_new)
{
int fs;
fs = file_status(fname_new);
if (fs == FN_FILE)
/* The new filename is there. */
return init_key_from_file(fname_new);
fs = file_status(fname_old);
if (fs != FN_FILE)
/* There is no key under either name. */
if (file_status(fname_new) == FN_FILE || file_status(fname_old) != FN_FILE)
/* The new filename is there, or both are, or neither is. */
return init_key_from_file(fname_new);
/* The old filename exists, and the new one doesn't. Rename and load. */
@ -284,6 +285,12 @@ int init_keys(void) {
prkey = init_key_from_file_name_changed(keydir,keydir2);
if (!prkey) return -1;
set_onion_key(prkey);
sprintf(keydir,"%s/keys/secret_onion_key.old",datadir);
if (file_status(keydir) == FN_FILE) {
prkey = init_key_from_file(keydir);
if (prkey)
lastonionkey = prkey;
}
/* 3. Initialize link key and TLS context. */
if (tor_tls_context_new(get_identity_key(), 1, options.Nickname,
@ -620,7 +627,7 @@ int router_dump_router_to_string(char *s, int maxlen, routerinfo_t *router,
/* How busy have we been? */
bandwidth_usage = rep_hist_get_bandwidth_lines();
/* Generate the easy portion of the router descriptor. */
result = snprintf(s, maxlen,
"router %s %s %d %d %d\n"