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Disable all TLS session tickets

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OpenSSL supports two types of session tickets for TLSv1.3, stateless
and stateful. The option we've used only turns off stateless tickets
leaving stateful tickets active. Use the new API introduced in 1.1.1
to disable all types of tickets.

Backpatch to all supported versions.

Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reported-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/20240617173803.6alnafnxpiqvlh3g@awork3.anarazel.de
Backpatch-through: v12
This commit is contained in:
Daniel Gustafsson 2024-07-26 11:09:45 +02:00
parent 6f9a62b454
commit 274bbced85
5 changed files with 23 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
configure vendored
View File

@ -12591,12 +12591,13 @@ fi
done
# Function introduced in OpenSSL 1.1.1.
for ac_func in X509_get_signature_info
for ac_func in X509_get_signature_info SSL_CTX_set_num_tickets
do :
ac_fn_c_check_func "$LINENO" "X509_get_signature_info" "ac_cv_func_X509_get_signature_info"
if test "x$ac_cv_func_X509_get_signature_info" = xyes; then :
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
cat >>confdefs.h <<_ACEOF
#define HAVE_X509_GET_SIGNATURE_INFO 1
#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
_ACEOF
fi

2
configure.ac
View File

@ -1358,7 +1358,7 @@ if test "$with_ssl" = openssl ; then
# function was removed.
AC_CHECK_FUNCS([CRYPTO_lock])
# Function introduced in OpenSSL 1.1.1.
AC_CHECK_FUNCS([X509_get_signature_info])
AC_CHECK_FUNCS([X509_get_signature_info SSL_CTX_set_num_tickets])
AC_DEFINE([USE_OPENSSL], 1, [Define to 1 to build with OpenSSL support. (--with-ssl=openssl)])
elif test "$with_ssl" != no ; then
AC_MSG_ERROR([--with-ssl must specify openssl])

1
meson.build
View File

@ -1362,6 +1362,7 @@ if sslopt in ['auto', 'openssl']
# Function introduced in OpenSSL 1.1.1
['X509_get_signature_info'],
['SSL_CTX_set_num_tickets'],
]
are_openssl_funcs_complete = true

14
src/backend/libpq/be-secure-openssl.c
View File

@ -259,8 +259,20 @@ be_tls_init(bool isServerStart)
}
}
/* disallow SSL session tickets */
/*
* Disallow SSL session tickets. OpenSSL use both stateful and stateless
* tickets for TLSv1.3, and stateless ticket for TLSv1.2. SSL_OP_NO_TICKET
* is available since 0.9.8f but only turns off stateless tickets. In
* order to turn off stateful tickets we need SSL_CTX_set_num_tickets,
* which is available since OpenSSL 1.1.1. LibreSSL 3.5.4 (from OpenBSD
* 7.1) introduced this API for compatibility, but doesn't support session
* tickets at all so it's a no-op there.
*/
#ifdef HAVE_SSL_CTX_SET_NUM_TICKETS
SSL_CTX_set_num_tickets(context, 0);
#else
SSL_CTX_set_options(context, SSL_OP_NO_TICKET);
#endif
/* disallow SSL session caching, too */
SSL_CTX_set_session_cache_mode(context, SSL_SESS_CACHE_OFF);

3
src/include/pg_config.h.in
View File

@ -517,6 +517,9 @@
/* Define to 1 if you have the `X509_get_signature_info' function. */
#undef HAVE_X509_GET_SIGNATURE_INFO
/* Define to 1 if you have the `SSL_CTX_set_num_tickets' function. */
#undef HAVE_SSL_CTX_SET_NUM_TICKETS
/* Define to 1 if the assembler supports X86_64's POPCNTQ instruction. */
#undef HAVE_X86_64_POPCNTQ