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nts: explicitly disable session tickets

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Session tickets should never be enabled with the currect code on both
clients and servers. Set the GNUTLS_NO_TICKETS flag when opening a TLS
session in case this understanding is wrong, or it changes in future, to
reduce the TLS attack surface.
This commit is contained in:
Miroslav Lichvar
2020-08-19 13:31:48 +02:00
parent 4cf6b29397
commit 892636036a
1 changed files with 2 additions and 1 deletions
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nts_ke_session.c
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@@ -217,7 +217,8 @@ create_tls_session(int server_mode, int sock_fd, const char *server_name,
unsigned int flags; unsigned int flags;
int r; int r;
r = gnutls_init(&session, GNUTLS_NONBLOCK | (server_mode ? GNUTLS_SERVER : GNUTLS_CLIENT)); r = gnutls_init(&session, GNUTLS_NONBLOCK | GNUTLS_NO_TICKETS |
(server_mode ? GNUTLS_SERVER : GNUTLS_CLIENT));
if (r < 0) { if (r < 0) {
LOG(LOGS_ERR, "Could not %s TLS session : %s", "create", gnutls_strerror(r)); LOG(LOGS_ERR, "Could not %s TLS session : %s", "create", gnutls_strerror(r));
return NULL; return NULL;