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[tor-commits] [tor] 03/08: connection_or_set_identity_digest: more defensive programming
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dgoulet pushed a commit to branch main
in repository tor.
commit 93625da29ed603dad14305ef767c61ca6e4ad5e1
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
AuthorDate: Tue Mar 1 11:55:40 2022 -0500
connection_or_set_identity_digest: more defensive programming
We expect ed_id == NULL here to indicate "no ed id", but other parts
of Tor sometimes use an all-0 ed_id. Here we detect that input and
replace it with what's expected.
---
src/core/or/connection_or.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/core/or/connection_or.c b/src/core/or/connection_or.c
index 069ee1d571..b3b5c389d5 100644
--- a/src/core/or/connection_or.c
+++ b/src/core/or/connection_or.c
@@ -165,6 +165,9 @@ connection_or_set_identity_digest(or_connection_t *conn,
if (conn->chan)
chan = TLS_CHAN_TO_BASE(conn->chan);
+ if (BUG(ed_id && ed25519_public_key_is_zero(ed_id)))
+ ed_id = NULL;
+
log_info(LD_HANDSHAKE, "Set identity digest for %s at %p: %s %s.",
connection_describe(TO_CONN(conn)),
conn,
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