clean up r11496

svn:r11498

doc/spec/rend-spec.txt

@@ -123,38 +123,34 @@ $Id$
 
    The first time the OP provides an advertised service, it generates
    a public/private keypair (stored locally).  Periodically, the OP
-   generates and publishes a descriptor of type "V0". The V1 descriptor
-   format in 0.1.1.5-alpha-cvs is understood and accepted, but currently
-   no Tors generate them. The more complex V1 descriptor format below
-   is just speculation and has never been used.
+   generates and publishes a descriptor of type "V0".
 
-   A hypothetical "V1" descriptor contains:
+   The "V0" descriptor contains:
 
-         V     Format byte: set to 255               [1 octet]
-         V     Version byte: set to 1                [1 octet]
          KL    Key length                            [2 octets]
          PK    Bob's public key                      [KL octets]
          TS    A timestamp                           [4 octets]
-         PROTO Rendezvous protocol versions: bitmask [2 octets]
-         NA    Number of auth mechanisms accepted    [1 octet]
-         For each auth mechanism:
-             AUTHT  The auth type that is supported  [2 octets]
-             AUTHL  Length of auth data              [1 octet]
-             AUTHD  Auth data                        [variable]
          NI    Number of introduction points         [2 octets]
-         For each introduction point: (as in INTRODUCE2 cells)
-             ATYPE  An address type (typically 4)    [1 octet]
-             ADDR   Introduction point's IP address  [4 or 16 octets]
-             PORT   Introduction point's OR port     [2 octets]
-             AUTHT  The auth type that is supported  [2 octets]
-             AUTHL  Length of auth data              [1 octet]
-             AUTHD  Auth data                        [variable]
-             ID     Introduction point identity ID   [20 octets]
-             KLEN   Length of onion key              [2 octets]
-             KEY    Introduction point onion key     [KLEN octets]
+         Ipt   A list of NUL-terminated ORs          [variable]
          SIG   Signature of above fields             [variable]
 
-   The "V1" descriptor in 0.1.1.5-alpha-cvs contains:
+   KL is the length of PK, in octets.
+   TS is the number of seconds elapsed since Jan 1, 1970.
+
+   The members of Ipt may be either (a) nicknames, or (b) identity key
+   digests, encoded in hex, and prefixed with a '$'.  Clients must
+   accept both forms. Services must only generate the second form.
+   Once 0.0.9.x is obsoleted, we can drop the first form.
+
+   [It's ok for Bob to advertise 0 introduction points. He might want
+    to do that if he previously advertised some introduction points,
+    and now he doesn't have any. -RD]
+
+1.2.1. Other descriptor formats we don't use.
+
+   The V1 descriptor format was understood and accepted from
+   0.1.1.5-alpha-cvs to 0.2.0.6-alpha-dev, but no Tors generated it and
+   was removed:
 
          V     Format byte: set to 255               [1 octet]
          V     Version byte: set to 1                [1 octet]
@@ -171,37 +167,39 @@ $Id$
              KEY    Introduction point onion key     [KLEN octets]
          SIG   Signature of above fields             [variable]
 
-   The "V0" descriptor contains:
+   A hypothetical "V1" descriptor, that has never been used but might
+   be useful for historical reasons, contains:
 
+         V     Format byte: set to 255               [1 octet]
+         V     Version byte: set to 1                [1 octet]
          KL    Key length                            [2 octets]
          PK    Bob's public key                      [KL octets]
          TS    A timestamp                           [4 octets]
+         PROTO Rendezvous protocol versions: bitmask [2 octets]
+         NA    Number of auth mechanisms accepted    [1 octet]
+         For each auth mechanism:
+             AUTHT  The auth type that is supported  [2 octets]
+             AUTHL  Length of auth data              [1 octet]
+             AUTHD  Auth data                        [variable]
          NI    Number of introduction points         [2 octets]
-         Ipt   A list of NUL-terminated ORs          [variable]
+         For each introduction point: (as in INTRODUCE2 cells)
+             ATYPE  An address type (typically 4)    [1 octet]
+             ADDR   Introduction point's IP address  [4 or 16 octets]
+             PORT   Introduction point's OR port     [2 octets]
+             AUTHT  The auth type that is supported  [2 octets]
+             AUTHL  Length of auth data              [1 octet]
+             AUTHD  Auth data                        [variable]
+             ID     Introduction point identity ID   [20 octets]
+             KLEN   Length of onion key              [2 octets]
+             KEY    Introduction point onion key     [KLEN octets]
          SIG   Signature of above fields             [variable]
 
-   KL is the length of PK, in octets.
-   TS is the number of seconds elapsed since Jan 1, 1970.
-
    AUTHT specifies which authentication/authorization mechanism is
    required by the hidden service or the introduction point. AUTHD
    is arbitrary data that can be associated with an auth approach.
    Currently only AUTHT of [00 00] is supported, with an AUTHL of 0.
    See section 2 of this document for details on auth mechanisms.
 
-   The members of Ipt may be either (a) nicknames, or (b) identity key
-   digests, encoded in hex, and prefixed with a '$'.  Clients must
-   accept both forms. Services must only generate the second form.
-   Once 0.0.9.x is obsoleted, we can drop the first form.
-
-   [It's ok for Bob to advertise 0 introduction points. He might want
-    to do that if he previously advertised some introduction points,
-    and now he doesn't have any. -RD]
-
-   [Once Tor 0.1.0.x is obsolete, we can stop generating or using V0
-    descriptors. -NM]
-   [This should rather be retarded until V2 descriptors are stable. -KL]
-
 1.3. Bob's OP establishes his introduction points.
 
    The OP establishes a new introduction circuit to each introduction
@@ -333,8 +331,6 @@ $Id$
 
        Cleartext
           PK_ID  Identifier for Bob's PK      [20 octets]
-[XXX011 want to put intro-level auth info here, but no version. crap. -RD]
-
        Encrypted to Bob's PK:
           RP     Rendezvous point's nickname  [20 octets]
           RC     Rendezvous cookie            [20 octets]
@@ -349,12 +345,33 @@ $Id$
           IP     Rendezvous point's address    [4 octets]
           PORT   Rendezvous point's OR port    [2 octets]
           ID     Rendezvous point identity ID [20 octets]
-          KLEN  Length of onion key            [2 octets]
+          KLEN   Length of onion key           [2 octets]
           KEY    Rendezvous point onion key [KLEN octets]
           RC     Rendezvous cookie            [20 octets]
           g^x    Diffie-Hellman data, part 1 [128 octets]
-        OR
-          VER    Version byte: set to 4.           [1 octet]
+
+   PK_ID is the hash of Bob's public key.  RP is NUL-padded and
+   terminated. In version 0, it must contain a nickname. In version 1,
+   it must contain EITHER a nickname or an identity key digest that is
+   encoded in hex and prefixed with a '$'.
+
+   The hybrid encryption to Bob's PK works just like the hybrid
+   encryption in CREATE cells (see tor-spec). Thus the payload of the
+   version 0 RELAY_INTRODUCE1 cell on the wire will contain
+   20+42+16+20+20+128=246 bytes, and the version 1 and version 2
+   introduction formats have other sizes.
+
+   As of Tor 0.2.0.6-alpha, clients only generate the v0 introduction
+   format, whereas hidden services have understoodd and accepted v0,
+   v1, and v2 since 0.1.1.x.
+
+1.8.1. Other introduction formats we don't use.
+
+    We briefly speculated about using the following format for the
+    "encrypted to Bob's PK" part of the introduction, but no Tors have
+    ever generated these.
+
+          VER    Version byte: set to 3.           [1 octet]
           ATYPE  An address type (typically 4)     [1 octet]
           ADDR   Rendezvous point's IP address     [4 or 16 octets]
           PORT   Rendezvous point's OR port        [2 octets]
@@ -367,22 +384,6 @@ $Id$
           RC     Rendezvous cookie               [20 octets]
           g^x    Diffie-Hellman data, part 1    [128 octets]
 
-   PK_ID is the hash of Bob's public key.  RP is NUL-padded and terminated,
-   and must contain EITHER a nickname, or an identity key digest, encoded in
-   hex, and prefixed with a '$'.
-
-   Implementations SHOULD accept all variants, although only the first,
-   unversioned variant SHOULD be generated.  If V1 descriptors were used,
-   implementations SHOULD have listed the variants they accept in their V1
-   descriptor, and implementations SHOULD only have generated the variants
-   listed in the service's V1 descriptor.  No version SHOULD generate the
-   second variant (version byte=1).
-
-   The hybrid encryption to Bob's PK works just like the hybrid
-   encryption in CREATE cells (see main spec). Thus the payload of the
-   RELAY_INTRODUCE1 cell on the wire will contain 20+42+16+20+20+128=246
-   bytes. [XXXX not really]
-
 1.9. Introduction: From the Introduction Point to Bob's OP
 
    If the Introduction Point recognizes PK_ID as a public key which has

src/or/rendcommon.c

@@ -43,7 +43,7 @@ rend_service_descriptor_free(rend_service_descriptor_t *desc)
   tor_free(desc);
 }
 
-/** Encode a service descriptor for <b>desc</b>, and sign it with
+/** Encode a V0 service descriptor for <b>desc</b>, and sign it with
  * <b>key</b>. Store the descriptor in *<b>str_out</b>, and set
  * *<b>len_out</b> to its length.
  */

src/or/rendservice.c

@@ -301,7 +301,8 @@ rend_service_update_descriptor(rend_service_t *service)
   d->n_intro_points = 0;
   d->intro_points = tor_malloc_zero(sizeof(char*)*n);
   d->intro_point_extend_info = tor_malloc_zero(sizeof(extend_info_t*)*n);
-  d->protocols = (1<<2) | (1<<0); /* We support protocol 2 and protocol 0. */
+  /* We support intro protocol 2 and protocol 0. */
+  d->protocols = (1<<2) | (1<<0);
   for (i=0; i < n; ++i) {
     router = router_get_by_nickname(smartlist_get(service->intro_nodes, i),1);
     if (!router) {
@@ -541,7 +542,7 @@ rend_service_introduce(origin_circuit_t *circuit, const char *request,
                                * any */
     router = router_get_by_nickname(rp_nickname, 0);
     if (!router) {
-      log_info(LD_REND, "Couldn't find router %s named in rendezvous cell.",
+      log_info(LD_REND, "Couldn't find router %s named in introduce2 cell.",
                escaped_safe_str(rp_nickname));
       /* XXXX Add a no-such-router reason? */
       reason = END_CIRC_REASON_TORPROTOCOL;