Finish most pre2 items: make running-routers list work right; rename secret key files; make even more lookup-by-nickname use lookup-by-id; default nicknames to hostname.

svn:r2043
2024-11-20 02:09:24 +01:00 · 2004-07-13 18:23:40 +00:00 · 2004-07-13 18:23:40 +00:00 · c2103eb63a
commit c2103eb63a
parent e9365f9ed5
9 changed files with 185 additions and 87 deletions
--- a/doc/TODO
+++ b/doc/TODO
@ -27,10 +27,6 @@ NICK  pre1:
          o make ORs parse-and-keep-and-serve the directory they pull down
          o authoritativedirservers should pull down directories from
            other authdirservers, to merge descriptors.
-        D Have clients and dirservers preserve reputation info over
-          reboots.
-	  [Deferred until we know what reputation info we actually want to
-	   maintain.  Our current algorithm Couldn't Possibly Work.]
        . allow dirservers to serve running-router list separately.
          o "get /running-routers" will fetch just this.
          o actually make the clients use this sometimes.
@ -50,23 +46,25 @@ NICK  pre1:
        o write tor version at the top of each log file

      pre2:
-        - refer to things by key:
+        . refer to things by key:
          o extend cells need ip:port:identitykeyhash.
-	  . Lookup routers and connections by key digest; accept hex
+	  o Lookup routers and connections by key digest; accept hex
            key digest in place of nicknames.
-          . Audit all uses of lookup-by-hostname and lookup-by-addr-port
+          o Audit all uses of lookup-by-hostname and lookup-by-addr-port
            to search by digest when appropriate.
-	  - Rep-hist functions
+	  o Rep-hist functions need to store info by keyid
          - also use this in intro points and rendezvous points, and
            hidserv descs.  [XXXX This isn't enough.]
          - figure out what to do about ip:port:differentkey
        o ORs connect on demand. attach circuits to new connections, keep
          create cells around somewhere, send destroy if fail.
-        - nickname defaults to first piece of hostname
-        - running-routers list refers to nickname if verified, else
+        o nickname defaults to first piece of hostname
+        o running-routers list refers to nickname if verified, else
          hash-base64'ed.
+	- Mark routers as verified or unverified based on whether
+          running-routers list includes nickname or id hash.
        o put OR uptime in descriptor
-        - name the secret-key directory something to discourage people
+        o name the secret-key directory something to discourage people
          from mailing their identity key to tor-ops

      pre3:
@ -83,6 +81,10 @@ NICK  pre1:
          - start counting again if your IP ever changes.
          - never regenerate identity keys, for now.
          - you can set a bit for not-being-an-OR.
+	- Reputation info needs to give better weight to recent events than
+	  very old ones.
+        - Have clients and dirservers preserve reputation info over
+          reboots.
        - clients choose nodes proportional to advertised bandwidth
        - authdirserver includes descriptor and lists as running iff:
          - he can connect to you
--- a/src/or/circuitbuild.c
+++ b/src/or/circuitbuild.c
@ -102,7 +102,7 @@ void circuit_log_path(int severity, circuit_t *circ) {
 */
 void circuit_rep_hist_note_result(circuit_t *circ) {
  struct crypt_path_t *hop;
-  char *prev_nickname = NULL;
+  char *prev_digest = NULL;
  routerinfo_t *router;
  hop = circ->cpath;
  if(!hop) {
@ -114,22 +114,22 @@ void circuit_rep_hist_note_result(circuit_t *circ) {
    return;
  }
  if (options.ORPort) {
-    prev_nickname = options.Nickname;
+    prev_digest = router_get_my_routerinfo()->identity_digest;
  }
  do {
    router = router_get_by_digest(hop->identity_digest);
    if (router) {
-      if (prev_nickname) {
+      if (prev_digest) {
        if (hop->state == CPATH_STATE_OPEN)
-          rep_hist_note_extend_succeeded(prev_nickname, router->nickname);
+          rep_hist_note_extend_succeeded(prev_digest, router->identity_digest);
        else {
-          rep_hist_note_extend_failed(prev_nickname, router->nickname);
+          rep_hist_note_extend_failed(prev_digest, router->identity_digest);
          break;
        }
      }
-      prev_nickname = router->nickname;
+      prev_digest = router->identity_digest;
    } else {
-      prev_nickname = NULL;
+      prev_digest = NULL;
    }
    hop=hop->next;
  } while (hop!=circ->cpath);
@ -445,6 +445,8 @@ int circuit_extend(cell_t *cell, circuit_t *circ) {
  relay_header_unpack(&rh, cell->payload);

  if (rh.length == 4+2+ONIONSKIN_CHALLENGE_LEN) {
+    /* Once this format is no longer supported, nobody will use
+     * connection_*_get_by_addr_port. */
    old_format = 1;
  } else if (rh.length == 4+2+DIGEST_LEN+ONIONSKIN_CHALLENGE_LEN) {
    old_format = 0;
--- a/src/or/config.c
+++ b/src/or/config.c
@ -467,6 +467,40 @@ static int resolve_my_address(or_options_t *options) {
  return 0;
 }

+static char *get_default_nickname(void)
+{
+  char localhostname[256];
+  char *cp, *out, *outp;
+
+  if(gethostname(localhostname,sizeof(localhostname)) < 0) {
+    log_fn(LOG_WARN,"Error obtaining local hostname");
+    return NULL;
+  }
+  /* Put it in lowercase; stop at the first dot. */
+  for(cp = localhostname; *cp; ++cp) {
+    if (*cp == '.') {
+      *cp = '\0';
+      break;
+    }
+    *cp = tolower(*cp);
+  }
+  /* Strip invalid characters. */
+  cp = localhostname;
+  out = outp = tor_malloc(strlen(localhostname)+1);
+  while (*cp) {
+    if (strchr(LEGAL_NICKNAME_CHARACTERS, *cp))
+      *outp++ = *cp++;
+    else
+      cp++;
+  }
+  *outp = '\0';
+  /* Enforce length. */
+  if (strlen(out) > MAX_NICKNAME_LEN)
+    out[MAX_NICKNAME_LEN]='\0';
+
+  return out;
+}
+
 /** Release storage held by <b>options</b> */
 static void free_options(or_options_t *options) {
  config_free_lines(options->LogOptions);
@ -633,8 +667,9 @@ int getconfig(int argc, char **argv, or_options_t *options) {

  if (options->ORPort) {
    if (options->Nickname == NULL) {
-      log_fn(LOG_WARN,"Nickname required if ORPort is set, but not found.");
-      result = -1;
+      if (!(options->Nickname = get_default_nickname()))
+        return -1;
+      log_fn(LOG_INFO, "Choosing default nickname %s", options->Nickname);
    } else {
      if (strspn(options->Nickname, LEGAL_NICKNAME_CHARACTERS) !=
                 strlen(options->Nickname)) {
--- a/src/or/connection.c
+++ b/src/or/connection.c
@ -192,13 +192,13 @@ void connection_about_to_close_connection(connection_t *conn)
      if (conn->state != OR_CONN_STATE_OPEN) {
        /* XXX Nick: this still isn't right, because it might be
         * dying even though we didn't initiate the connect. Can
-         * you look at this more? -RD */
+         * you look at this more? -RD XXXX008 -NM*/
        if(conn->nickname)
-          rep_hist_note_connect_failed(conn->nickname, time(NULL));
+          rep_hist_note_connect_failed(conn->identity_digest, time(NULL));
      } else if (0) { // XXX reason == CLOSE_REASON_UNUSED_OR_CONN) {
-        rep_hist_note_disconnect(conn->nickname, time(NULL));
+        rep_hist_note_disconnect(conn->identity_digest, time(NULL));
      } else {
-        rep_hist_note_connection_died(conn->nickname, time(NULL));
+        rep_hist_note_connection_died(conn->identity_digest, time(NULL));
      }
      break;
    case CONN_TYPE_AP:
--- a/src/or/connection_or.c
+++ b/src/or/connection_or.c
@ -329,7 +329,7 @@ connection_tls_finish_handshake(connection_t *conn) {
  directory_set_dirty();
  circuit_n_conn_done(conn, 1); /* send the pending creates, if any. */
  /* Note the success */
-  rep_hist_note_connect_succeeded(nickname, time(NULL));
+  rep_hist_note_connect_succeeded(conn->identity_digest, time(NULL));
  return 0;
 }

--- a/src/or/cpuworker.c
+++ b/src/or/cpuworker.c
@ -19,7 +19,7 @@ extern or_options_t options; /* command-line and config-file options */
 #define MIN_CPUWORKERS 1

 /** The tag specifies which circuit this onionskin was from. */
-#define TAG_LEN 8
+#define TAG_LEN (DIGEST_LEN+2)
 /** How many bytes are sent from tor to the cpuworker? */
 #define LEN_ONION_QUESTION (1+TAG_LEN+ONIONSKIN_CHALLENGE_LEN)
 /** How many bytes are sent from the cpuworker back to tor? */
@ -55,23 +55,17 @@ int connection_cpu_finished_flushing(connection_t *conn) {

 /** Pack addr,port,and circ_id; set *tag to the result. (See note on
 * cpuworker_main for wire format.) */
-static void tag_pack(char *tag, uint32_t addr, uint16_t port, uint16_t circ_id) {
-  *(uint32_t *)tag     = addr;
-  *(uint16_t *)(tag+4) = port;
-  *(uint16_t *)(tag+6) = circ_id;
+static void tag_pack(char *tag, uint16_t circ_id, const char *identity_digest){
+  *(uint16_t *)(tag) = circ_id;
+  memcpy(tag+2, identity_digest, DIGEST_LEN);
 }

 /** Unpack <b>tag</b> into addr, port, and circ_id.
 */
-static void tag_unpack(const char *tag, uint32_t *addr, uint16_t *port, uint16_t *circ_id) {
-  struct in_addr in;
-
-  *addr    = *(const uint32_t *)tag;
-  *port    = *(const uint16_t *)(tag+4);
-  *circ_id = *(const uint16_t *)(tag+6);
-
-  in.s_addr = htonl(*addr);
-  log_fn(LOG_DEBUG,"onion was from %s:%d, circ_id %d.", inet_ntoa(in), *port, *circ_id);
+static void tag_unpack(const char *tag, uint16_t *circ_id,
+                       char *identity_digest) {
+  *circ_id = *(const uint16_t *)(tag);
+  memcpy(identity_digest, tag+2, DIGEST_LEN);
 }

 /** Called when the onion key has changed and we need to spawn new
@ -98,11 +92,10 @@ void cpuworkers_rotate(void)
 int connection_cpu_process_inbuf(connection_t *conn) {
  char success;
  unsigned char buf[LEN_ONION_RESPONSE];
-  uint32_t addr;
-  uint16_t port;
  uint16_t circ_id;
  connection_t *p_conn;
  circuit_t *circ;
+  char identity_digest[DIGEST_LEN];

  tor_assert(conn && conn->type == CONN_TYPE_CPUWORKER);

@ -130,11 +123,11 @@ int connection_cpu_process_inbuf(connection_t *conn) {
    connection_fetch_from_buf(buf,LEN_ONION_RESPONSE-1,conn);

    /* parse out the circ it was talking about */
-    tag_unpack(buf, &addr, &port, &circ_id);
+    tag_unpack(buf, &circ_id, identity_digest);
    circ = NULL;
    /* XXXX This is actually right: we want a specific port here in
     * case there are multiple connections. */
-    p_conn = connection_exact_get_by_addr_port(addr,port);
+    p_conn = connection_get_by_identity_digest(identity_digest,CONN_TYPE_OR);
    if(p_conn)
      circ = circuit_get_by_circ_id_conn(circ_id, p_conn);

@ -358,7 +351,7 @@ int assign_to_cpuworker(connection_t *cpuworker, unsigned char question_type,
      log_fn(LOG_INFO,"circ->p_conn gone. Failing circ.");
      return -1;
    }
-    tag_pack(tag, circ->p_conn->addr, circ->p_conn->port, circ->p_circ_id);
+    tag_pack(tag, circ->p_circ_id, circ->p_conn->identity_digest);

    cpuworker->state = CPUWORKER_STATE_BUSY_ONION;
    num_cpuworkers_busy++;
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@ -181,16 +181,25 @@ dirserv_router_fingerprint_is_known(const routerinfo_t *router)
 /** Return true iff any router named <b>nickname</b> is in the fingerprint
 * list. */
 static int
-router_nickname_is_approved(const char *nickname)
+router_nickname_is_approved(const char *nickname, const char *digest)
 {
-  int i;
+  int i,j;
  fingerprint_entry_t *ent;
+  char fp[FINGERPRINT_LEN+1];
  if (!fingerprint_list)
    return 0;

+  for (i=j=0;i<DIGEST_LEN;++i,++j) {
+    fp[i]=digest[j];
+    if ((j%4)==3 && j != 19)
+      fp[++i]=' ';
+  }
+  fp[i]='\0';
+
  for (i=0;i<smartlist_len(fingerprint_list);++i) {
    ent = smartlist_get(fingerprint_list, i);
-    if (!strcasecmp(nickname,ent->nickname)) {
+    if (!strcasecmp(nickname,ent->nickname) &&
+        !strcasecmp(fp,ent->fingerprint)) {
      return 1;
    }
  }
@ -227,6 +236,7 @@ typedef struct descriptor_entry_t {
  time_t published;
  size_t desc_len;
  char *descriptor;
+  int verified;
  routerinfo_t *router;
 } descriptor_entry_t;

@ -368,6 +378,7 @@ dirserv_add_descriptor(const char **desc)
  strncpy(ent->descriptor, start, desc_len);
  ent->descriptor[desc_len] = '\0';
  ent->router = ri;
+  ent->verified = 1; /* XXXX008 support other possibilities. */
  smartlist_add(descriptor_list, ent);

  *desc = end;
@ -447,19 +458,25 @@ list_running_servers(char **nicknames_out)
  *nicknames_out = NULL;
  nicknames_up = smartlist_create();
  nicknames_down = smartlist_create();
-  smartlist_add(nicknames_up, options.Nickname);
+  smartlist_add(nicknames_up, tor_strdup(options.Nickname));

  get_connection_array(&connection_array, &n_conns);
  for (i = 0; i<n_conns; ++i) {
+    char *name;
    conn = connection_array[i];
    if (conn->type != CONN_TYPE_OR || !conn->nickname)
      continue; /* only list ORs. */
-    if (!router_nickname_is_approved(conn->nickname))
-      continue; /* If we removed them from the approved list, don't list it.*/
+    if (router_nickname_is_approved(conn->nickname, conn->identity_digest)) {
+      name = tor_strdup(conn->nickname);
+    } else {
+      name = tor_malloc(HEX_DIGEST_LEN+1);
+      base16_encode(name, HEX_DIGEST_LEN, conn->identity_digest, DIGEST_LEN);
+    }
+
    if(conn->state == OR_CONN_STATE_OPEN)
-      smartlist_add(nicknames_up, conn->nickname);
+      smartlist_add(nicknames_up, name);
    else
-      smartlist_add(nicknames_down, conn->nickname);
+      smartlist_add(nicknames_down, name);
  }
  length = smartlist_len(nicknames_up) +
           2*smartlist_len(nicknames_down) + 1;
@ -481,6 +498,8 @@ list_running_servers(char **nicknames_out)
    while (*cp)
      ++cp;
  }
+  SMARTLIST_FOREACH(nicknames_up, char *, victim, tor_free(victim));
+  SMARTLIST_FOREACH(nicknames_down, char *, victim, tor_free(victim));
  smartlist_free(nicknames_up);
  smartlist_free(nicknames_down);
  return 0;
--- a/src/or/rephist.c
+++ b/src/or/rephist.c
@ -7,6 +7,8 @@
 * \brief Basic history functionality for reputation module.
 **/

+/* DOCDOC references to 'nicknames' in docs here are mostly wrong. */
+
 #include "or.h"

 /** History of an OR-\>OR link. */
@ -47,15 +49,18 @@ static strmap_t *history_map = NULL;

 /** Return the or_history_t for the named OR, creating it if necessary.
 */
-static or_history_t *get_or_history(const char* nickname)
+static or_history_t *get_or_history(const char* id)
 {
  or_history_t *hist;
-  hist = (or_history_t*) strmap_get(history_map, nickname);
+  char hexid[HEX_DIGEST_LEN+1];
+  base16_encode(hexid, HEX_DIGEST_LEN+1, id, DIGEST_LEN);
+
+  hist = (or_history_t*) strmap_get(history_map, hexid);
  if (!hist) {
    hist = tor_malloc_zero(sizeof(or_history_t));
    hist->link_history_map = strmap_new();
    hist->since = time(NULL);
-    strmap_set(history_map, nickname, hist);
+    strmap_set(history_map, hexid, hist);
  }
  return hist;
 }
@ -63,17 +68,19 @@ static or_history_t *get_or_history(const char* nickname)
 /** Return the link_history_t for the link from the first named OR to
 * the second, creating it if necessary.
 */
-static link_history_t *get_link_history(const char *from_name,
-                                        const char *to_name)
+static link_history_t *get_link_history(const char *from_id,
+                                        const char *to_id)
 {
  or_history_t *orhist;
  link_history_t *lhist;
-  orhist = get_or_history(from_name);
-  lhist = (link_history_t*) strmap_get(orhist->link_history_map, to_name);
+  char to_hexid[HEX_DIGEST_LEN+1];
+  orhist = get_or_history(from_id);
+  base16_encode(to_hexid, HEX_DIGEST_LEN+1, to_id, DIGEST_LEN);
+  lhist = (link_history_t*) strmap_get(orhist->link_history_map, to_hexid);
  if (!lhist) {
    lhist = tor_malloc_zero(sizeof(link_history_t));
    lhist->since = time(NULL);
-    strmap_set(orhist->link_history_map, to_name, lhist);
+    strmap_set(orhist->link_history_map, to_hexid, lhist);
  }
  return lhist;
 }
@ -104,10 +111,10 @@ void rep_hist_init(void)
 /** Remember that an attempt to connect to the OR <b>nickname</b> failed at
 * <b>when</b>.
 */
-void rep_hist_note_connect_failed(const char* nickname, time_t when)
+void rep_hist_note_connect_failed(const char* id, time_t when)
 {
  or_history_t *hist;
-  hist = get_or_history(nickname);
+  hist = get_or_history(id);
  ++hist->n_conn_fail;
  if (hist->up_since) {
    hist->uptime += (when - hist->up_since);
@ -120,10 +127,10 @@ void rep_hist_note_connect_failed(const char* nickname, time_t when)
 /** Remember that an attempt to connect to the OR <b>nickname</b> succeeded
 * at <b>when</b>.
 */
-void rep_hist_note_connect_succeeded(const char* nickname, time_t when)
+void rep_hist_note_connect_succeeded(const char* id, time_t when)
 {
  or_history_t *hist;
-  hist = get_or_history(nickname);
+  hist = get_or_history(id);
  ++hist->n_conn_ok;
  if (hist->down_since) {
    hist->downtime += (when - hist->down_since);
@ -136,10 +143,10 @@ void rep_hist_note_connect_succeeded(const char* nickname, time_t when)
 /** Remember that we intentionally closed our connection to the OR
 * <b>nickname</b> at <b>when</b>.
 */
-void rep_hist_note_disconnect(const char* nickname, time_t when)
+void rep_hist_note_disconnect(const char* id, time_t when)
 {
  or_history_t *hist;
-  hist = get_or_history(nickname);
+  hist = get_or_history(id);
  ++hist->n_conn_ok;
  if (hist->up_since) {
    hist->uptime += (when - hist->up_since);
@ -147,20 +154,21 @@ void rep_hist_note_disconnect(const char* nickname, time_t when)
  }
 }

-/** Remember that our connection to the OR <b>nickname</b> had an error and
+/** Remember that our connection to the OR <b>id</b> had an error and
 * stopped working at <b>when</b>.
 */
-void rep_hist_note_connection_died(const char* nickname, time_t when)
+void rep_hist_note_connection_died(const char* id, time_t when)
 {
  or_history_t *hist;
-  if(!nickname) {
+  if(!id) {
+    /* XXXX008 not so. */
    /* If conn has no nickname, it's either an OP, or it is an OR
     * which didn't complete its handshake (or did and was unapproved).
     * Ignore it.
     */
    return;
  }
-  hist = get_or_history(nickname);
+  hist = get_or_history(id);
  if (hist->up_since) {
    hist->uptime += (when - hist->up_since);
    hist->up_since = 0;
@ -172,23 +180,23 @@ void rep_hist_note_connection_died(const char* nickname, time_t when)
 /** Remember that we successfully extended from the OR <b>from_name</b> to
 * the OR <b>to_name</b>.
 */
-void rep_hist_note_extend_succeeded(const char *from_name,
-                                    const char *to_name)
+void rep_hist_note_extend_succeeded(const char *from_id,
+                                    const char *to_id)
 {
  link_history_t *hist;
  /* log_fn(LOG_WARN, "EXTEND SUCCEEDED: %s->%s",from_name,to_name); */
-  hist = get_link_history(from_name, to_name);
+  hist = get_link_history(from_id, to_id);
  ++hist->n_extend_ok;
 }

 /** Remember that we tried to extend from the OR <b>from_name</b> to the OR
 * <b>to_name</b>, but failed.
 */
-void rep_hist_note_extend_failed(const char *from_name, const char *to_name)
+void rep_hist_note_extend_failed(const char *from_id, const char *to_id)
 {
  link_history_t *hist;
  /* log_fn(LOG_WARN, "EXTEND FAILED: %s->%s",from_name,to_name); */
-  hist = get_link_history(from_name, to_name);
+  hist = get_link_history(from_id, to_id);
  ++hist->n_extend_fail;
 }

@ -199,7 +207,7 @@ void rep_hist_dump_stats(time_t now, int severity)
 {
  strmap_iter_t *lhist_it;
  strmap_iter_t *orhist_it;
-  const char *name1, *name2;
+  const char *name1, *name2, *hexdigest1, *hexdigest2;
  or_history_t *or_history;
  link_history_t *link_history;
  void *or_history_p, *link_history_p;
@ -207,14 +215,20 @@ void rep_hist_dump_stats(time_t now, int severity)
  char buffer[2048];
  int len;
  unsigned long upt, downt;
+  routerinfo_t *r;

  log(severity, "--------------- Dumping history information:");

  for (orhist_it = strmap_iter_init(history_map); !strmap_iter_done(orhist_it);
       orhist_it = strmap_iter_next(history_map,orhist_it)) {
-    strmap_iter_get(orhist_it, &name1, &or_history_p);
+    strmap_iter_get(orhist_it, &hexdigest1, &or_history_p);
    or_history = (or_history_t*) or_history_p;

+    if ((r = router_get_by_hexdigest(hexdigest1)))
+      name1 = r->nickname;
+    else
+      name1 = "(unknown)";
+
    update_or_history(or_history, now);
    upt = or_history->uptime;
    downt = or_history->downtime;
@ -224,8 +238,8 @@ void rep_hist_dump_stats(time_t now, int severity)
      uptime=1.0;
    }
    log(severity,
-        "OR %s: %ld/%ld good connections; uptime %ld/%ld sec (%.2f%%)",
-        name1,
+        "OR %s [%s]: %ld/%ld good connections; uptime %ld/%ld sec (%.2f%%)",
+        name1, hexdigest1,
        or_history->n_conn_ok, or_history->n_conn_fail+or_history->n_conn_ok,
        upt, upt+downt, uptime*100.0);

@ -234,7 +248,12 @@ void rep_hist_dump_stats(time_t now, int severity)
    for (lhist_it = strmap_iter_init(or_history->link_history_map);
         !strmap_iter_done(lhist_it);
         lhist_it = strmap_iter_next(or_history->link_history_map, lhist_it)) {
-      strmap_iter_get(lhist_it, &name2, &link_history_p);
+      strmap_iter_get(lhist_it, &hexdigest2, &link_history_p);
+      if ((r = router_get_by_hexdigest(hexdigest2)))
+        name2 = r->nickname;
+      else
+        name2 = "(unknown)";
+
      link_history = (link_history_t*) link_history_p;
      len += snprintf(buffer+len, 2048-len, "%s(%ld/%ld); ", name2,
                      link_history->n_extend_ok,
@ -275,7 +294,6 @@ void write_rep_history(const char *filename)
            name1, or_history->since1,
  }

-
 done:
  if (f)
    fclose(f);
--- a/src/or/router.c
+++ b/src/or/router.c
@ -124,6 +124,32 @@ void rotate_onion_key(void)
  log_fn(LOG_WARN, "Couldn't rotate onion key.");
 }

+/* Read an RSA secret key key from a file that was once named fname_old,
+ * but is now named fname_new.  Rename the file from old to new as needed.
+ */
+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. */
+    return init_key_from_file(fname_new);
+
+  /* The old filename exists, and the new one doesn't.  Rename and load. */
+  if (rename(fname_old, fname_new) < 0) {
+    log_fn(LOG_ERR, "Couldn't rename %s to %s: %s", fname_old, fname_new,
+           strerror(errno));
+    return NULL;
+  }
+  return init_key_from_file(fname_new);
+}
+
 /** Try to read an RSA key from <b>fname</b>.  If <b>fname</b> doesn't exist,
 * create a new RSA key and save it in <b>fname</b>.  Return the read/created
 * key, or NULL on error.
@ -182,6 +208,7 @@ crypto_pk_env_t *init_key_from_file(const char *fname)
 */
 int init_keys(void) {
  char keydir[512];
+  char keydir2[512];
  char fingerprint[FINGERPRINT_LEN+MAX_NICKNAME_LEN+3];
  char *cp;
  const char *tmp, *mydesc, *datadir;
@ -217,15 +244,17 @@ int init_keys(void) {
  cp = keydir + strlen(keydir); /* End of string. */

  /* 1. Read identity key. Make it if none is found. */
-  strcpy(cp, "/identity.key");
-  log_fn(LOG_INFO,"Reading/making identity key %s...",keydir);
-  prkey = init_key_from_file(keydir);
+  sprintf(keydir,"%s/keys/identity.key",datadir);
+  sprintf(keydir2,"%s/keys/secret_id_key",datadir);
+  log_fn(LOG_INFO,"Reading/making identity key %s...",keydir2);
+  prkey = init_key_from_file_name_changed(keydir,keydir2);
  if (!prkey) return -1;
  set_identity_key(prkey);
  /* 2. Read onion key.  Make it if none is found. */
-  strcpy(cp, "/onion.key");
-  log_fn(LOG_INFO,"Reading/making onion key %s...",keydir);
-  prkey = init_key_from_file(keydir);
+  sprintf(keydir,"%s/keys/onion.key",datadir);
+  sprintf(keydir2,"%s/keys/secret_onion_key",datadir);
+  log_fn(LOG_INFO,"Reading/making onion key %s...",keydir2);
+  prkey = init_key_from_file_name_changed(keydir,keydir2);
  if (!prkey) return -1;
  set_onion_key(prkey);