[tor-commits] [tor/maint-0.3.1] Add unittest for #23233.

Mon Aug 21 18:20:37 UTC 2017

commit 45732a1a13cb05107f5822afed0c01388096be27
Author: George Kadianakis <desnacked at riseup.net>
Date:   Thu Aug 17 23:12:59 2017 +0300

    Add unittest for #23233.
    
    This will fail currently since the bug is not fixed yet.
---
 src/or/hs_descriptor.c          |   2 +-
 src/test/test_hs_descriptor.c   |  29 ++++++
 src/test/test_hs_descriptor.inc | 224 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 254 insertions(+), 1 deletion(-)

diff --git a/src/or/hs_descriptor.c b/src/or/hs_descriptor.c
index 2a000f500..7c2e76942 100644
--- a/src/or/hs_descriptor.c
+++ b/src/or/hs_descriptor.c
@@ -1241,7 +1241,7 @@ cert_is_valid(tor_cert_t *cert, uint8_t type, const char *log_obj_type)
   }
   /* The following will not only check if the signature matches but also the
    * expiration date and overall validity. */
-  if (tor_cert_checksig(cert, &cert->signing_key, time(NULL)) < 0) {
+  if (tor_cert_checksig(cert, &cert->signing_key, approx_time()) < 0) {
     log_warn(LD_REND, "Invalid signature for %s.", log_obj_type);
     goto err;
   }
diff --git a/src/test/test_hs_descriptor.c b/src/test/test_hs_descriptor.c
index b1abe381d..5be074708 100644
--- a/src/test/test_hs_descriptor.c
+++ b/src/test/test_hs_descriptor.c
@@ -19,6 +19,15 @@
 #include "test_helpers.h"
 #include "log_test_helpers.h"
 
+
+#ifdef HAVE_CFLAG_WOVERLENGTH_STRINGS
+DISABLE_GCC_WARNING(overlength-strings)
+/* We allow huge string constants in the unit tests, but not in the code
+ * at large. */
+#endif
+#include "test_hs_descriptor.inc"
+ENABLE_GCC_WARNING(overlength-strings)
+
 /* Test certificate encoding put in a descriptor. */
 static void
 test_cert_encoding(void *arg)
@@ -548,6 +557,24 @@ test_decode_invalid_intro_point(void *arg)
   desc_intro_point_free(ip);
 }
 
+/** Make sure we fail gracefully when decoding the bad desc from #23233. */
+static void
+test_decode_bad_signature(void *arg)
+{
+  hs_desc_plaintext_data_t desc_plaintext;
+  int ret;
+
+  (void) arg;
+
+  /* Update approx time to dodge cert expiration */
+  update_approx_time(1502661599);
+
+  ret = hs_desc_decode_plaintext(HS_DESC_BAD_SIG, &desc_plaintext);
+  tt_int_op(ret, OP_EQ, -1);
+
+ done: ;
+}
+
 static void
 test_decode_plaintext(void *arg)
 {
@@ -838,6 +865,8 @@ struct testcase_t hs_descriptor[] = {
     NULL, NULL },
   { "decode_plaintext", test_decode_plaintext, TT_FORK,
     NULL, NULL },
+  { "decode_bad_signature", test_decode_bad_signature, TT_FORK,
+    NULL, NULL },
 
   /* Misc. */
   { "version", test_supported_version, TT_FORK,
diff --git a/src/test/test_hs_descriptor.inc b/src/test/test_hs_descriptor.inc
new file mode 100644
index 000000000..70a2c7c2f
--- /dev/null
+++ b/src/test/test_hs_descriptor.inc
@@ -0,0 +1,224 @@
+static const char* HS_DESC_BAD_SIG =
+"hs-descriptor 3\n"
+"descriptor-lifetime 180\n"
+"descriptor-signing-key-cert\n"
+"-----BEGIN ED25519 CERT-----\n"
+"AQgABl5+AQoPXRnCGEOxIup3AcjQXb8npNiUFm2Qv7A6JKk/K+EuAQAgBAD18iUD\n"
+"nbkUblnUvTHzipq4bcr6aPyFVB42Ptobg4xr8s3VjHiJtjs9MDEdr6nXS7UlyhEl\n"
+"78vsuFEvLp7cvAgGxYY1xGXdn5RdHMCdi8W9yZLKMQX9OuJckmp1C6q+cA4=\n"
+"-----END ED25519 CERT-----\n"
+"revision-counter 42\n"
+"superencrypted\n"
+"-----BEGIN MESSAGE-----\n"
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+"-----END MESSAGE-----\n"
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