September 2017 - tor-commits - lists.torproject.org

[tor/master] hs: Pad RENDEZVOUS1 v3 cell to match length of v2
by nickm＠torproject.org 25 Sep '17

25 Sep '17

commit a3f5a246693cca2f6a51e418e6edf8fae2fe75b5 Author: David Goulet <dgoulet(a)torproject.org> Date: Tue Sep 19 09:07:42 2017 -0400 hs: Pad RENDEZVOUS1 v3 cell to match length of v2 RENDEZVOUS1 cell is 84 bytes long in v3 and 168 bytes long in v2 so this commit pads with random bytes the v3 cells up to 168 bytes so they all look alike at the rendezvous point. Closes #23420 Signed-off-by: David Goulet <dgoulet(a)torproject.org> --- changes/ticket23420 | 4 ++++ src/or/hs_circuit.c | 9 +++++++++ src/or/hs_common.h | 6 ++++++ src/or/rendservice.c | 2 +- 4 files changed, 20 insertions(+), 1 deletion(-) diff --git a/changes/ticket23420 b/changes/ticket23420 new file mode 100644 index 000000000..6516466c1 --- /dev/null +++ b/changes/ticket23420 @@ -0,0 +1,4 @@ + o Minor bugfixes (hidden service v3): + - Pad RENDEZVOUS cell up to the size of the legacy cell which is much + bigger so the rendezvous point can't distinguish which hidden service + protocol is being used. Fixes ticket 23420.; bugfix on 0.3.2.1-alpha. diff --git a/src/or/hs_circuit.c b/src/or/hs_circuit.c index 2bfeac747..01e987c40 100644 --- a/src/or/hs_circuit.c +++ b/src/or/hs_circuit.c @@ -820,6 +820,15 @@ hs_circ_service_rp_has_opened(const hs_service_t *service, sizeof(circ->hs_ident->rendezvous_handshake_info), payload); + /* Pad the payload with random bytes so it matches the size of a legacy cell + * which is normally always bigger. Also, the size of a legacy cell is + * always smaller than the RELAY_PAYLOAD_SIZE so this is safe. */ + if (payload_len < HS_LEGACY_RENDEZVOUS_CELL_SIZE) { + crypto_rand((char *) payload + payload_len, + HS_LEGACY_RENDEZVOUS_CELL_SIZE - payload_len); + payload_len = HS_LEGACY_RENDEZVOUS_CELL_SIZE; + } + if (relay_send_command_from_edge(CONTROL_CELL_ID, TO_CIRCUIT(circ), RELAY_COMMAND_RENDEZVOUS1, (const char *) payload, payload_len, diff --git a/src/or/hs_common.h b/src/or/hs_common.h index e28ffe1ad..c95e59a6f 100644 --- a/src/or/hs_common.h +++ b/src/or/hs_common.h @@ -118,6 +118,12 @@ /* Default value of hsdir spread fetch (hsdir_spread_fetch). */ #define HS_DEFAULT_HSDIR_SPREAD_FETCH 3 +/* The size of a legacy RENDEZVOUS1 cell which adds up to 168 bytes. It is + * bigger than the 84 bytes needed for version 3 so we need to pad up to that + * length so it is indistinguishable between versions. */ +#define HS_LEGACY_RENDEZVOUS_CELL_SIZE \ + (REND_COOKIE_LEN + DH_KEY_LEN + DIGEST_LEN) + /* Type of authentication key used by an introduction point. */ typedef enum { HS_AUTH_KEY_TYPE_LEGACY = 1, diff --git a/src/or/rendservice.c b/src/or/rendservice.c index 1e89ab6a7..74646c78d 100644 --- a/src/or/rendservice.c +++ b/src/or/rendservice.c @@ -3398,7 +3398,7 @@ rend_service_rendezvous_has_opened(origin_circuit_t *circuit) /* Send the cell */ if (relay_send_command_from_edge(0, TO_CIRCUIT(circuit), RELAY_COMMAND_RENDEZVOUS1, - buf, REND_COOKIE_LEN+DH_KEY_LEN+DIGEST_LEN, + buf, HS_LEGACY_RENDEZVOUS_CELL_SIZE, circuit->cpath->prev)<0) { log_warn(LD_GENERAL, "Couldn't send RENDEZVOUS1 cell."); goto done;

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[tor/master] prop224: Add test for parsing RENDEZVOUS1 cell.
by nickm＠torproject.org 25 Sep '17

25 Sep '17

commit 03b3f5486ae169dd53e2b5fc1bca1c9ba7c8f5da Author: George Kadianakis <desnacked(a)riseup.net> Date: Mon Sep 25 15:00:06 2017 +0300 prop224: Add test for parsing RENDEZVOUS1 cell. Just making sure that added padding does not screw up cell parsing. --- src/or/hs_circuit.c | 6 ++- src/or/hs_circuit.h | 10 ++++ src/or/hs_client.c | 2 +- src/or/hs_client.h | 3 ++ src/test/test_hs_service.c | 131 ++++++++++++++++++++++++++++++++++++++++++++- 5 files changed, 148 insertions(+), 4 deletions(-) diff --git a/src/or/hs_circuit.c b/src/or/hs_circuit.c index 01e987c40..e1e513c5f 100644 --- a/src/or/hs_circuit.c +++ b/src/or/hs_circuit.c @@ -5,6 +5,8 @@ * \file hs_circuit.c **/ +#define HS_CIRCUIT_PRIVATE + #include "or.h" #include "circpathbias.h" #include "circuitbuild.h" @@ -18,10 +20,10 @@ #include "router.h" #include "hs_cell.h" -#include "hs_circuit.h" #include "hs_ident.h" #include "hs_ntor.h" #include "hs_service.h" +#include "hs_circuit.h" /* Trunnel. */ #include "ed25519_cert.h" @@ -235,7 +237,7 @@ count_opened_desc_intro_point_circuits(const hs_service_t *service, /* From a given service, rendezvous cookie and handshake info, create a * rendezvous point circuit identifier. This can't fail. */ -static hs_ident_circuit_t * +STATIC hs_ident_circuit_t * create_rp_circuit_identifier(const hs_service_t *service, const uint8_t *rendezvous_cookie, const curve25519_public_key_t *server_pk, diff --git a/src/or/hs_circuit.h b/src/or/hs_circuit.h index 9085e3fb0..0a1186dba 100644 --- a/src/or/hs_circuit.h +++ b/src/or/hs_circuit.h @@ -59,5 +59,15 @@ int hs_circuit_setup_e2e_rend_circ(origin_circuit_t *circ, int hs_circuit_setup_e2e_rend_circ_legacy_client(origin_circuit_t *circ, const uint8_t *rend_cell_body); +#ifdef HS_CIRCUIT_PRIVATE + +STATIC hs_ident_circuit_t * +create_rp_circuit_identifier(const hs_service_t *service, + const uint8_t *rendezvous_cookie, + const curve25519_public_key_t *server_pk, + const hs_ntor_rend_cell_keys_t *keys); + +#endif + #endif /* !defined(TOR_HS_CIRCUIT_H) */ diff --git a/src/or/hs_client.c b/src/or/hs_client.c index 77fbf548e..e29f8beca 100644 --- a/src/or/hs_client.c +++ b/src/or/hs_client.c @@ -845,7 +845,7 @@ handle_introduce_ack(origin_circuit_t *circ, const uint8_t *payload, /* Called when we get a RENDEZVOUS2 cell on the rendezvous circuit circ. The * encoded cell is in payload of length payload_len. Return 0 on success or a * negative value on error. On error, the circuit is marked for close. */ -static int +STATIC int handle_rendezvous2(origin_circuit_t *circ, const uint8_t *payload, size_t payload_len) { diff --git a/src/or/hs_client.h b/src/or/hs_client.h index 4eee1174b..08ab7736b 100644 --- a/src/or/hs_client.h +++ b/src/or/hs_client.h @@ -77,6 +77,9 @@ client_get_random_intro(const ed25519_public_key_t *service_pk); STATIC extend_info_t * desc_intro_point_to_extend_info(const hs_desc_intro_point_t *ip); +STATIC int handle_rendezvous2(origin_circuit_t *circ, const uint8_t *payload, + size_t payload_len); + #endif /* defined(HS_CLIENT_PRIVATE) */ #endif /* !defined(TOR_HS_CLIENT_H) */ diff --git a/src/test/test_hs_service.c b/src/test/test_hs_service.c index ca6af43ba..859476b70 100644 --- a/src/test/test_hs_service.c +++ b/src/test/test_hs_service.c @@ -14,10 +14,12 @@ #define HS_COMMON_PRIVATE #define HS_SERVICE_PRIVATE #define HS_INTROPOINT_PRIVATE +#define HS_CIRCUIT_PRIVATE #define MAIN_PRIVATE #define NETWORKSTATUS_PRIVATE #define STATEFILE_PRIVATE #define TOR_CHANNEL_INTERNAL_ +#define HS_CLIENT_PRIVATE #include "test.h" #include "test_helpers.h" @@ -37,11 +39,12 @@ #include "hs_common.h" #include "hs_config.h" -#include "hs_circuit.h" #include "hs_ident.h" #include "hs_intropoint.h" #include "hs_ntor.h" +#include "hs_circuit.h" #include "hs_service.h" +#include "hs_client.h" #include "main.h" #include "rendservice.h" #include "statefile.h" @@ -1366,6 +1369,130 @@ test_revision_counter_state(void *arg) service_descriptor_free(desc_two); } +/** Global vars used by test_rendezvous1_parsing() */ +char rend1_payload[RELAY_PAYLOAD_SIZE]; +size_t rend1_payload_len = 0; + +/** Mock for relay_send_command_from_edge() to send a RENDEZVOUS1 cell. Instead + * of sending it to the network, instead save it to the global `rend1_payload` + * variable so that we can inspect it in the test_rendezvous1_parsing() + * test. */ +static int +mock_relay_send_rendezvous1(streamid_t stream_id, circuit_t *circ, + uint8_t relay_command, const char *payload, + size_t payload_len, + crypt_path_t *cpath_layer, + const char *filename, int lineno) +{ + (void) stream_id; + (void) circ; + (void) relay_command; + (void) cpath_layer; + (void) filename; + (void) lineno; + + memcpy(rend1_payload, payload, payload_len); + rend1_payload_len = payload_len; + + return 0; +} + +/** Send a RENDEZVOUS1 as a service, and parse it as a client. */ +static void +test_rendezvous1_parsing(void *arg) +{ + int retval; + static const char *test_addr = + "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion"; + hs_service_t *service = NULL; + origin_circuit_t *service_circ = NULL; + origin_circuit_t *client_circ = NULL; + ed25519_keypair_t ip_auth_kp; + curve25519_keypair_t ephemeral_kp; + curve25519_keypair_t client_kp; + curve25519_keypair_t ip_enc_kp; + int flags = CIRCLAUNCH_NEED_UPTIME | CIRCLAUNCH_IS_INTERNAL; + + (void) arg; + + MOCK(relay_send_command_from_edge_, mock_relay_send_rendezvous1); + + { + /* Let's start by setting up the service that will start the rend */ + service = tor_malloc_zero(sizeof(hs_service_t)); + ed25519_secret_key_generate(&service->keys.identity_sk, 0); + ed25519_public_key_generate(&service->keys.identity_pk, + &service->keys.identity_sk); + memcpy(service->onion_address, test_addr, sizeof(service->onion_address)); + tt_assert(service); + } + + { + /* Now let's set up the service rendezvous circuit and its keys. */ + service_circ = helper_create_origin_circuit(CIRCUIT_PURPOSE_S_CONNECT_REND, + flags); + tor_free(service_circ->hs_ident); + hs_ntor_rend_cell_keys_t hs_ntor_rend_cell_keys; + uint8_t rendezvous_cookie[HS_REND_COOKIE_LEN]; + curve25519_keypair_generate(&ip_enc_kp, 0); + curve25519_keypair_generate(&ephemeral_kp, 0); + curve25519_keypair_generate(&client_kp, 0); + ed25519_keypair_generate(&ip_auth_kp, 0); + retval = hs_ntor_service_get_rendezvous1_keys(&ip_auth_kp.pubkey, + &ip_enc_kp, + &ephemeral_kp, + &client_kp.pubkey, + &hs_ntor_rend_cell_keys); + tt_int_op(retval, OP_EQ, 0); + + memset(rendezvous_cookie, 2, sizeof(rendezvous_cookie)); + service_circ->hs_ident = + create_rp_circuit_identifier(service, rendezvous_cookie, + &ephemeral_kp.pubkey, + &hs_ntor_rend_cell_keys); + } + + /* Send out the RENDEZVOUS1 and make sure that our mock func worked */ + tt_assert(tor_mem_is_zero(rend1_payload, 32)); + hs_circ_service_rp_has_opened(service, service_circ); + tt_assert(!tor_mem_is_zero(rend1_payload, 32)); + tt_int_op(rend1_payload_len, OP_EQ, HS_LEGACY_RENDEZVOUS_CELL_SIZE); + + /******************************/ + + /** Now let's create the client rendezvous circuit */ + client_circ = + helper_create_origin_circuit(CIRCUIT_PURPOSE_C_REND_READY_INTRO_ACKED, + flags); + /* fix up its circ ident */ + ed25519_pubkey_copy(&client_circ->hs_ident->intro_auth_pk, + &ip_auth_kp.pubkey); + memcpy(&client_circ->hs_ident->rendezvous_client_kp, + &client_kp, sizeof(client_circ->hs_ident->rendezvous_client_kp)); + memcpy(&client_circ->hs_ident->intro_enc_pk.public_key, + &ip_enc_kp.pubkey.public_key, + sizeof(client_circ->hs_ident->intro_enc_pk.public_key)); + + /* Now parse the rendezvous2 circuit and make sure it was fine. We are + * skipping 20 bytes off its payload, since that's the rendezvous cookie + * which is only present in REND1. */ + retval = handle_rendezvous2(client_circ, + (uint8_t*)rend1_payload+20, + rend1_payload_len-20); + tt_int_op(retval, OP_EQ, 0); + + /* TODO: We are only simulating client/service here. We could also simulate + * the rendezvous point by plugging in rend_mid_establish_rendezvous(). We + * would need an extra circuit and some more stuff but it's doable. */ + + done: + circuit_free(TO_CIRCUIT(service_circ)); + circuit_free(TO_CIRCUIT(client_circ)); + hs_service_free(service); + hs_free_all(); + UNMOCK(relay_send_command_from_edge_); +} + struct testcase_t hs_service_tests[] = { { "e2e_rend_circuit_setup", test_e2e_rend_circuit_setup, TT_FORK, NULL, NULL }, @@ -1395,6 +1522,8 @@ struct testcase_t hs_service_tests[] = { NULL, NULL }, { "revision_counter_state", test_revision_counter_state, TT_FORK, NULL, NULL }, + { "rendezvous1_parsing", test_rendezvous1_parsing, TT_FORK, + NULL, NULL }, END_OF_TESTCASES };

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[tor/master] Merge remote-tracking branch 'asn/ticket23420_032_01'
by nickm＠torproject.org 25 Sep '17

25 Sep '17

commit 777e828ef3d9f38d9684bc4f1d92e1af2460bfc2 Merge: a1f31c067 03b3f5486 Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Sep 25 09:24:36 2017 -0400 Merge remote-tracking branch 'asn/ticket23420_032_01' changes/ticket23420 | 4 ++ src/or/hs_circuit.c | 15 +++++- src/or/hs_circuit.h | 10 ++++ src/or/hs_client.c | 2 +- src/or/hs_client.h | 3 ++ src/or/hs_common.h | 6 +++ src/or/rendservice.c | 2 +- src/test/test_hs_service.c | 131 ++++++++++++++++++++++++++++++++++++++++++++- 8 files changed, 168 insertions(+), 5 deletions(-)

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[tor/master] fix changes file
by nickm＠torproject.org 25 Sep '17

25 Sep '17

commit f82f1f4b8cc98d7fea2bcc0fb5bf7973cd3f164e Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Sep 25 09:29:11 2017 -0400 fix changes file --- changes/ticket23420 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/changes/ticket23420 b/changes/ticket23420 index 6516466c1..8b976cdaa 100644 --- a/changes/ticket23420 +++ b/changes/ticket23420 @@ -1,4 +1,4 @@ o Minor bugfixes (hidden service v3): - Pad RENDEZVOUS cell up to the size of the legacy cell which is much bigger so the rendezvous point can't distinguish which hidden service - protocol is being used. Fixes ticket 23420.; bugfix on 0.3.2.1-alpha. + protocol is being used. Fixes bug 23420; bugfix on 0.3.2.1-alpha.

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[translation/tails-persistence-setup] Update translations for tails-persistence-setup
by translation＠torproject.org 25 Sep '17

25 Sep '17

commit ce9013caa8c44ac21f90b4552276823abc6a893d Author: Translation commit bot <translation(a)torproject.org> Date: Mon Sep 25 10:46:06 2017 +0000 Update translations for tails-persistence-setup --- bo/bo.po | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/bo/bo.po b/bo/bo.po index c5b02e1d8..126910d09 100644 --- a/bo/bo.po +++ b/bo/bo.po @@ -8,7 +8,7 @@ msgstr "" "Project-Id-Version: The Tor Project\n" "Report-Msgid-Bugs-To: Tails developers <tails(a)boum.org>\n" "POT-Creation-Date: 2017-05-15 13:51+0200\n" -"PO-Revision-Date: 2017-05-17 03:09+0000\n" +"PO-Revision-Date: 2017-09-25 10:17+0000\n" "Last-Translator: carolyn <carolyn(a)anhalt.org>\n" "Language-Team: Tibetan (http://www.transifex.com/otf/torproject/language/bo/)\n" "MIME-Version: 1.0\n" @@ -312,7 +312,7 @@ msgstr "" #: ../lib/Tails/Persistence/Step/Delete.pm:54 msgid "Delete" -msgstr "" +msgstr "སུབ།" #: ../lib/Tails/Persistence/Step/Delete.pm:111 msgid "Deleting..."

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[translation/tails-greeter-2] Update translations for tails-greeter-2
by translation＠torproject.org 25 Sep '17

25 Sep '17

commit a24e469b9456cd40d9bf79ffbe13b9d3a7539d47 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Sep 25 10:19:17 2017 +0000 Update translations for tails-greeter-2 --- bo/bo.po | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/bo/bo.po b/bo/bo.po index 723d2b53d..82efcb44c 100644 --- a/bo/bo.po +++ b/bo/bo.po @@ -10,7 +10,7 @@ msgstr "" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2017-09-15 21:21+0200\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" -"Last-Translator: Tor Project <support-team-private(a)lists.torproject.org>, 2016\n" +"Last-Translator: Lobsang Gyatso Sither <lobsangsither(a)gmail.com>, 2017\n" "Language-Team: Tibetan (https://www.transifex.com/otf/teams/1519/bo/)\n" "MIME-Version: 1.0\n" "Content-Type: text/plain; charset=UTF-8\n" @@ -255,7 +255,7 @@ msgstr "Cancel" #: ../tailsgreeter/gui.py:608 msgid "Add" -msgstr "" +msgstr "ཁ་སྣོན།" #: ../tailsgreeter/gui.py:616 msgid "Back"

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[translation/tor-messenger-uiproperties] Update translations for tor-messenger-uiproperties
by translation＠torproject.org 25 Sep '17

25 Sep '17

commit 3c4e0620ef940e3f5b11f4a8b16db2871c301e01 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Sep 25 10:19:09 2017 +0000 Update translations for tor-messenger-uiproperties --- bo/ui.properties | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/bo/ui.properties b/bo/ui.properties index de5c23213..70c43b8b2 100644 --- a/bo/ui.properties +++ b/bo/ui.properties @@ -2,7 +2,7 @@ start.label=Start private conversation end.label=End private conversation refresh.label=Refresh private conversation auth.label=Verify your contact's identity -auth.cancel=Cancel +auth.cancel=མེད་པ་བཟོས། auth.cancelAccessKey=C auth.error=An error occurred while verifying your contact's identity. auth.success=Verifying your contact's identity completed successfully.

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[translation/tails-misc] Update translations for tails-misc
by translation＠torproject.org 25 Sep '17

25 Sep '17

commit e29a39a007255c26884c4cfcfa0a232300e2e17a Author: Translation commit bot <translation(a)torproject.org> Date: Mon Sep 25 10:16:41 2017 +0000 Update translations for tails-misc --- bo.po | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/bo.po b/bo.po index 1270d0768..81312b4b7 100644 --- a/bo.po +++ b/bo.po @@ -8,7 +8,7 @@ msgstr "" "Project-Id-Version: The Tor Project\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2017-09-13 20:10+0200\n" -"PO-Revision-Date: 2017-09-19 19:57+0000\n" +"PO-Revision-Date: 2017-09-25 10:14+0000\n" "Last-Translator: carolyn <carolyn(a)anhalt.org>\n" "Language-Team: Tibetan (http://www.transifex.com/otf/torproject/language/bo/)\n" "MIME-Version: 1.0\n"

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[translation/mat-gui] Update translations for mat-gui
by translation＠torproject.org 25 Sep '17

25 Sep '17

commit a89383c820d054b5ca5c8d85939383c94cdc3684 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Sep 25 10:16:09 2017 +0000 Update translations for mat-gui --- bo.po | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/bo.po b/bo.po index 96bad8ca7..64b63ef5e 100644 --- a/bo.po +++ b/bo.po @@ -8,7 +8,7 @@ msgstr "" "Project-Id-Version: The Tor Project\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2016-02-10 23:06+0100\n" -"PO-Revision-Date: 2017-09-19 19:57+0000\n" +"PO-Revision-Date: 2017-09-25 09:58+0000\n" "Last-Translator: carolyn <carolyn(a)anhalt.org>\n" "Language-Team: Tibetan (http://www.transifex.com/otf/torproject/language/bo/)\n" "MIME-Version: 1.0\n" @@ -148,7 +148,7 @@ msgstr "" #: data/mat.glade:187 msgid "Add" -msgstr "" +msgstr "ཁ་སྣོན།" #: data/mat.glade:256 msgid "State"

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[translation/liveusb-creator] Update translations for liveusb-creator
by translation＠torproject.org 25 Sep '17

25 Sep '17

commit af6851cc9c0994bc4963f0368da42013773cb446 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Sep 25 09:15:42 2017 +0000 Update translations for liveusb-creator --- pt/pt.po | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/pt/pt.po b/pt/pt.po index b88fe4e98..bf9808a0a 100644 --- a/pt/pt.po +++ b/pt/pt.po @@ -22,7 +22,7 @@ msgstr "" "Project-Id-Version: The Tor Project\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2017-09-20 18:02+0200\n" -"PO-Revision-Date: 2017-09-25 08:33+0000\n" +"PO-Revision-Date: 2017-09-25 08:56+0000\n" "Last-Translator: Henrique Rodrigues\n" "Language-Team: Portuguese (http://www.transifex.com/otf/torproject/language/pt/)\n" "MIME-Version: 1.0\n" @@ -391,7 +391,7 @@ msgstr "Instalação completa!" #: ../tails_installer/gui.py:644 msgid "Installation was completed." -msgstr "" +msgstr "Instalação completa!" #: ../tails_installer/gui.py:693 msgid "Unable to mount device" @@ -500,7 +500,7 @@ msgstr "" #: ../data/tails-installer.ui.h:1 msgid "Installation Instructions" -msgstr "" +msgstr "Guias de instalação" #: ../data/tails-installer.ui.h:2 msgid "Clone the current Tails"

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