tor-commits July 2018

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[tor/master] Merge branch 'ticket26890'
by nickm＠torproject.org 30 Jul '18

30 Jul '18

commit 70b16bc679435c5168d7d8f47a36d72bff24c0d8 Merge: ba1bb90a7 c515dc8d0 Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Jul 30 09:08:39 2018 -0400 Merge branch 'ticket26890' src/lib/log/util_bug.c | 4 ---- src/lib/log/util_bug.h | 3 +-- 2 files changed, 1 insertion(+), 6 deletions(-)

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[tor/master] Remove a now-obsolete comment about deadcode_dummy__
by nickm＠torproject.org 30 Jul '18

30 Jul '18

commit acb54dee7bd247ae2d631de5a0d63d246574d479 Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Jul 30 09:09:10 2018 -0400 Remove a now-obsolete comment about deadcode_dummy__ --- src/lib/log/util_bug.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/src/lib/log/util_bug.h b/src/lib/log/util_bug.h index 2ef5be8d3..44a4f8381 100644 --- a/src/lib/log/util_bug.h +++ b/src/lib/log/util_bug.h @@ -89,8 +89,6 @@ #undef BUG // Coverity defines this in global headers; let's override it. This is a // magic coverity-only preprocessor thing. -// We use this "deadcode_dummy__" trick to prevent coverity from -// complaining about unreachable bug cases. #nodef BUG(x) (x) #endif /* defined(__COVERITY__) */

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[tor/master] Remove over-cleverness from our coverity BUG() definition.
by nickm＠torproject.org 30 Jul '18

30 Jul '18

commit c515dc8d0d17b9ce5e8c4f31ba2bd58c15fb90bf Author: Nick Mathewson <nickm(a)torproject.org> Date: Fri Jul 20 11:18:11 2018 -0400 Remove over-cleverness from our coverity BUG() definition. Our previous definition implied that code would never keep running if a BUG occurred (which it does), and that BUG(x) might be true even if x was false (which it can't be). Closes ticket 26890. Bugfix on 0.3.1.4-alpha. --- src/lib/log/util_bug.c | 4 ---- src/lib/log/util_bug.h | 3 +-- 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/src/lib/log/util_bug.c b/src/lib/log/util_bug.c index 42b3670a7..b23f4edc9 100644 --- a/src/lib/log/util_bug.c +++ b/src/lib/log/util_bug.c @@ -20,10 +20,6 @@ #include <string.h> -#ifdef __COVERITY__ -int bug_macro_deadcode_dummy__ = 0; -#endif - #ifdef TOR_UNIT_TESTS static void (*failed_assertion_cb)(void) = NULL; static int n_bugs_to_capture = 0; diff --git a/src/lib/log/util_bug.h b/src/lib/log/util_bug.h index 61ee60f72..2ef5be8d3 100644 --- a/src/lib/log/util_bug.h +++ b/src/lib/log/util_bug.h @@ -86,13 +86,12 @@ */ #ifdef __COVERITY__ -extern int bug_macro_deadcode_dummy__; #undef BUG // Coverity defines this in global headers; let's override it. This is a // magic coverity-only preprocessor thing. // We use this "deadcode_dummy__" trick to prevent coverity from // complaining about unreachable bug cases. -#nodef BUG(x) ((x)?(__coverity_panic__(),1):(0+bug_macro_deadcode_dummy__)) +#nodef BUG(x) (x) #endif /* defined(__COVERITY__) */ #if defined(__COVERITY__) || defined(__clang_analyzer__)

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[tor/maint-0.3.3] Merge remote-tracking branch 'teor/bug26627_033' into maint-0.3.3
by nickm＠torproject.org 30 Jul '18

30 Jul '18

commit 4f854dbdc2f3ade1b6c0cb610907fe1ad085f9ca Merge: a159eaf45 3821081a5 Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Jul 30 09:01:45 2018 -0400 Merge remote-tracking branch 'teor/bug26627_033' into maint-0.3.3 changes/bug26627 | 7 +++++++ src/or/hs_circuit.c | 20 ++++++++++++++------ src/or/hs_service.c | 29 ++++++++++++++++++++--------- src/or/hs_service.h | 5 +++-- src/test/test_hs_cell.c | 4 ++-- src/test/test_hs_intropoint.c | 4 ++-- src/test/test_hs_service.c | 2 +- 7 files changed, 49 insertions(+), 22 deletions(-)

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[tor/maint-0.3.4] Stop sending unsupported ed25519 link specifiers in v3 introduce cells
by nickm＠torproject.org 30 Jul '18

30 Jul '18

commit a99920c7d4ace4d87f6876ab3aaef79ee1aff509 Author: teor <teor2345(a)gmail.com> Date: Fri Jul 6 16:06:44 2018 +1000 Stop sending unsupported ed25519 link specifiers in v3 introduce cells Stop sending ed25519 link specifiers in v3 onion service introduce cells, when the rendezvous point doesn't support ed25519 link authentication. Fixes bug 26627; bugfix on 0.3.2.4-alpha. --- changes/bug26627 | 4 ++++ src/or/hs_circuit.c | 20 ++++++++++++++------ 2 files changed, 18 insertions(+), 6 deletions(-) diff --git a/changes/bug26627 b/changes/bug26627 new file mode 100644 index 000000000..a46038f72 --- /dev/null +++ b/changes/bug26627 @@ -0,0 +1,4 @@ + o Minor bugfixes (v3 onion services): + - Stop sending ed25519 link specifiers in v3 onion service introduce + cells, when the rendezvous point doesn't support ed25519 link + authentication. Fixes bug 26627; bugfix on 0.3.2.4-alpha. diff --git a/src/or/hs_circuit.c b/src/or/hs_circuit.c index 3a674f622..0a9999a19 100644 --- a/src/or/hs_circuit.c +++ b/src/or/hs_circuit.c @@ -559,10 +559,14 @@ retry_service_rendezvous_point(const origin_circuit_t *circ) return; } -/* Add all possible link specifiers in node to lspecs. - * legacy ID is mandatory thus MUST be present in node. If the primary address - * is not IPv4, log a BUG() warning, and return an empty smartlist. - * Includes ed25519 id and IPv6 link specifiers if present in the node. */ +/* Add all possible link specifiers in node to lspecs: + * - legacy ID is mandatory thus MUST be present in node; + * - include ed25519 link specifier if present in the node, and the node + * supports ed25519 link authentication, even if its link versions are not + * compatible with us; + * - include IPv4 link specifier, if the primary address is not IPv4, log a + * BUG() warning, and return an empty smartlist; + * - include IPv6 link specifier if present in the node. */ static void get_lspecs_from_node(const node_t *node, smartlist_t *lspecs) { @@ -600,8 +604,12 @@ get_lspecs_from_node(const node_t *node, smartlist_t *lspecs) link_specifier_set_ls_len(ls, link_specifier_getlen_un_legacy_id(ls)); smartlist_add(lspecs, ls); - /* ed25519 ID is only included if the node has it. */ - if (!ed25519_public_key_is_zero(&node->ed25519_id)) { + /* ed25519 ID is only included if the node has it, and the node declares a + protocol version that supports ed25519 link authentication, even if that + link version is not compatible with us. (We are sending the ed25519 key + to another tor, which may support different link versions.) */ + if (!ed25519_public_key_is_zero(&node->ed25519_id) && + node_supports_ed25519_link_authentication(node, 0)) { ls = link_specifier_new(); link_specifier_set_ls_type(ls, LS_ED25519_ID); memcpy(link_specifier_getarray_un_ed25519_id(ls), &node->ed25519_id,

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[tor/maint-0.3.3] Stop sending unsupported ed25519 link specifiers in v3 introduce cells
by nickm＠torproject.org 30 Jul '18

30 Jul '18

1 0

[tor/maint-0.3.3] Stop putting unsupported ed25519 link auth in v3 onion service descs
by nickm＠torproject.org 30 Jul '18

30 Jul '18

commit 3821081a550efc090bb6c583041e1b26a2db72b5 Author: teor <teor(a)torproject.org> Date: Tue Jul 24 18:22:41 2018 +1000 Stop putting unsupported ed25519 link auth in v3 onion service descs Stop putting ed25519 link specifiers in v3 onion service descriptors, when the intro point doesn't support ed25519 link authentication. Fixes bug 26627; bugfix on 0.3.2.4-alpha. --- changes/bug26627 | 3 +++ src/or/hs_service.c | 29 ++++++++++++++++++++--------- src/or/hs_service.h | 5 +++-- src/test/test_hs_cell.c | 4 ++-- src/test/test_hs_intropoint.c | 4 ++-- src/test/test_hs_service.c | 2 +- 6 files changed, 31 insertions(+), 16 deletions(-) diff --git a/changes/bug26627 b/changes/bug26627 index a46038f72..d28bd05d5 100644 --- a/changes/bug26627 +++ b/changes/bug26627 @@ -2,3 +2,6 @@ - Stop sending ed25519 link specifiers in v3 onion service introduce cells, when the rendezvous point doesn't support ed25519 link authentication. Fixes bug 26627; bugfix on 0.3.2.4-alpha. + - Stop putting ed25519 link specifiers in v3 onion service descriptors, + when the intro point doesn't support ed25519 link authentication. + Fixes bug 26627; bugfix on 0.3.2.4-alpha. diff --git a/src/or/hs_service.c b/src/or/hs_service.c index c31f8bbf6..21daaaa24 100644 --- a/src/or/hs_service.c +++ b/src/or/hs_service.c @@ -376,17 +376,21 @@ service_intro_point_free_void(void *obj) } /* Return a newly allocated service intro point and fully initialized from the - * given extend_info_t ei if non NULL. If is_legacy is true, we also generate - * the legacy key. On error, NULL is returned. + * given extend_info_t ei if non NULL. + * If is_legacy is true, we also generate the legacy key. + * If supports_ed25519_link_handshake_any is true, we add the relay's ed25519 + * key to the link specifiers. * * If ei is NULL, returns a hs_service_intro_point_t with an empty link * specifier list and no onion key. (This is used for testing.) + * On any other error, NULL is returned. * * ei must be an extend_info_t containing an IPv4 address. (We will add supoort * for IPv6 in a later release.) When calling extend_info_from_node(), pass * 0 in for_direct_connection to make sure ei always has an IPv4 address. */ STATIC hs_service_intro_point_t * -service_intro_point_new(const extend_info_t *ei, unsigned int is_legacy) +service_intro_point_new(const extend_info_t *ei, unsigned int is_legacy, + unsigned int supports_ed25519_link_handshake_any) { hs_desc_link_specifier_t *ls; hs_service_intro_point_t *ip; @@ -453,10 +457,13 @@ service_intro_point_new(const extend_info_t *ei, unsigned int is_legacy) } smartlist_add(ip->base.link_specifiers, ls); - /* ed25519 identity key is optional for intro points */ - ls = hs_desc_link_specifier_new(ei, LS_ED25519_ID); - if (ls) { - smartlist_add(ip->base.link_specifiers, ls); + /* ed25519 identity key is optional for intro points. If the node supports + * ed25519 link authentication, we include it. */ + if (supports_ed25519_link_handshake_any) { + ls = hs_desc_link_specifier_new(ei, LS_ED25519_ID); + if (ls) { + smartlist_add(ip->base.link_specifiers, ls); + } } /* IPv6 is not supported in this release. */ @@ -1586,8 +1593,12 @@ pick_intro_point(unsigned int direct_conn, smartlist_t *exclude_nodes) tor_assert_nonfatal(!ed25519_public_key_is_zero(&info->ed_identity)); } - /* Create our objects and populate them with the node information. */ - ip = service_intro_point_new(info, !node_supports_ed25519_hs_intro(node)); + /* Create our objects and populate them with the node information. + * We don't care if the intro's link auth is compatible with us, because + * we are sending the ed25519 key to a remote client via the descriptor. */ + ip = service_intro_point_new(info, !node_supports_ed25519_hs_intro(node), + node_supports_ed25519_link_authentication(node, + 0)); if (ip == NULL) { goto err; } diff --git a/src/or/hs_service.h b/src/or/hs_service.h index d163eeef2..f3cd49e07 100644 --- a/src/or/hs_service.h +++ b/src/or/hs_service.h @@ -307,8 +307,9 @@ STATIC void remove_service(hs_service_ht *map, hs_service_t *service); STATIC int register_service(hs_service_ht *map, hs_service_t *service); /* Service introduction point functions. */ STATIC hs_service_intro_point_t *service_intro_point_new( - const extend_info_t *ei, - unsigned int is_legacy); + const extend_info_t *ei, + unsigned int is_legacy, + unsigned int supports_ed25519_link_handshake_any); STATIC void service_intro_point_free_(hs_service_intro_point_t *ip); #define service_intro_point_free(ip) \ FREE_AND_NULL(hs_service_intro_point_t, \ diff --git a/src/test/test_hs_cell.c b/src/test/test_hs_cell.c index 1b3c788a6..aed28d3bd 100644 --- a/src/test/test_hs_cell.c +++ b/src/test/test_hs_cell.c @@ -38,7 +38,7 @@ test_gen_establish_intro_cell(void *arg) attempt to parse it. */ { /* We only need the auth key pair here. */ - hs_service_intro_point_t *ip = service_intro_point_new(NULL, 0); + hs_service_intro_point_t *ip = service_intro_point_new(NULL, 0, 0); /* Auth key pair is generated in the constructor so we are all set for * using this IP object. */ ret = hs_cell_build_establish_intro(circ_nonce, ip, buf); @@ -106,7 +106,7 @@ test_gen_establish_intro_cell_bad(void *arg) ed25519_sign_prefixed() function and make it fail. */ cell = trn_cell_establish_intro_new(); tt_assert(cell); - ip = service_intro_point_new(NULL, 0); + ip = service_intro_point_new(NULL, 0, 0); cell_len = hs_cell_build_establish_intro(circ_nonce, ip, NULL); service_intro_point_free(ip); expect_log_msg_containing("Unable to make signature for " diff --git a/src/test/test_hs_intropoint.c b/src/test/test_hs_intropoint.c index 5b75e3893..ec4dcb470 100644 --- a/src/test/test_hs_intropoint.c +++ b/src/test/test_hs_intropoint.c @@ -49,7 +49,7 @@ new_establish_intro_cell(const char *circ_nonce, /* Auth key pair is generated in the constructor so we are all set for * using this IP object. */ - ip = service_intro_point_new(NULL, 0); + ip = service_intro_point_new(NULL, 0, 0); tt_assert(ip); cell_len = hs_cell_build_establish_intro(circ_nonce, ip, buf); tt_i64_op(cell_len, OP_GT, 0); @@ -75,7 +75,7 @@ new_establish_intro_encoded_cell(const char *circ_nonce, uint8_t *cell_out) /* Auth key pair is generated in the constructor so we are all set for * using this IP object. */ - ip = service_intro_point_new(NULL, 0); + ip = service_intro_point_new(NULL, 0, 0); tt_assert(ip); cell_len = hs_cell_build_establish_intro(circ_nonce, ip, cell_out); tt_i64_op(cell_len, OP_GT, 0); diff --git a/src/test/test_hs_service.c b/src/test/test_hs_service.c index 2e5280610..c1e9f3ced 100644 --- a/src/test/test_hs_service.c +++ b/src/test/test_hs_service.c @@ -241,7 +241,7 @@ static hs_service_intro_point_t * helper_create_service_ip(void) { hs_desc_link_specifier_t *ls; - hs_service_intro_point_t *ip = service_intro_point_new(NULL, 0); + hs_service_intro_point_t *ip = service_intro_point_new(NULL, 0, 0); tor_assert(ip); /* Add a first unused link specifier. */ ls = tor_malloc_zero(sizeof(*ls));

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[tor/maint-0.3.4] Stop putting unsupported ed25519 link auth in v3 onion service descs
by nickm＠torproject.org 30 Jul '18

30 Jul '18

1 0

[tor/maint-0.3.4] Merge branch 'maint-0.3.3' into maint-0.3.4
by nickm＠torproject.org 30 Jul '18

30 Jul '18

commit 21babc8d3f138be94336cad40168390ed9509793 Merge: 7d66ec0fe 4f854dbdc Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Jul 30 09:01:59 2018 -0400 Merge branch 'maint-0.3.3' into maint-0.3.4 changes/bug26627 | 7 +++++++ src/or/hs_circuit.c | 20 ++++++++++++++------ src/or/hs_service.c | 29 ++++++++++++++++++++--------- src/or/hs_service.h | 5 +++-- src/test/test_hs_cell.c | 4 ++-- src/test/test_hs_intropoint.c | 4 ++-- src/test/test_hs_service.c | 2 +- 7 files changed, 49 insertions(+), 22 deletions(-)

1 0

[tor/master] Stop sending unsupported ed25519 link specifiers in v3 introduce cells
by nickm＠torproject.org 30 Jul '18

30 Jul '18

1 0

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