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bug#22143/prop#140: identify input diffs by their digest-as-signed

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See may 3 changes to prop140 for more background.
This commit is contained in:
Nick Mathewson
2017-05-03 11:48:08 -04:00
parent 77d9dd39c3
commit 5acddbbbf7
6 changed files with 77 additions and 13 deletions
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src/or/consdiff.c
+14 -2
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@@ -91,6 +91,18 @@ consensus_compute_digest,(const char *cons,
return r;
}
/** Compute the digest-as-signed of <b>cons</b>, and store the result in
* <b>digest_out</b>. Return 0 on success, -1 on failure. */
/* This is a separate, mockable function so that we can override it when
* fuzzing. */
MOCK_IMPL(STATIC int,
consensus_compute_digest_as_signed,(const char *cons,
consensus_digest_t *digest_out))
{
return router_get_networkstatus_v3_sha3_as_signed(digest_out->sha3_256,
cons);
}
/** Return true iff <b>d1</b> and <b>d2</b> contain the same digest */
/* This is a separate, mockable function so that we can override it when
* fuzzing. */
@@ -1250,7 +1262,7 @@ consensus_diff_generate(const char *cons1,
int r1, r2;
char *result = NULL;
r1 = consensus_compute_digest(cons1, &d1);
r1 = consensus_compute_digest_as_signed(cons1, &d1);
r2 = consensus_compute_digest(cons2, &d2);
if (BUG(r1 < 0 || r2 < 0))
return NULL; // LCOV_EXCL_LINE
@@ -1291,7 +1303,7 @@ consensus_diff_apply(const char *consensus,
char *result = NULL;
memarea_t *area = memarea_new();
r1 = consensus_compute_digest(consensus, &d1);
r1 = consensus_compute_digest_as_signed(consensus, &d1);
if (BUG(r1 < 0))
return NULL; // LCOV_EXCL_LINE