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| author | Daiki Ueno <dueno@redhat.com> | 2019-01-02 13:21:49 +0100 |
|---|---|---|
| committer | Daiki Ueno <dueno@redhat.com> | 2019-01-09 05:56:52 +0100 |
| commit | 86eecda9a9719ce4c72f80159741ccf588487bc7 (patch) | |
| tree | fc6c05bf8a9ee8f5ff760c5d8d0b6737e478c456 /lib/tls-sig.c | |
| parent | 62d1d56f5d0531027dac9be07df39f38c5619373 (diff) | |
| download | gnutls-86eecda9a9719ce4c72f80159741ccf588487bc7.tar.gz | |
tls-sig: check RSA-PSS signature key compatibility also in TLS 1.2
This extends commit 51d21634 to cover the optional TLS 1.2 cases,
which RFC 8446 4.2.3 suggests: "Implementations that advertise support
for RSASSA-PSS (which is mandatory in TLS 1.3) MUST be prepared to
accept a signature using that scheme even when TLS 1.2 is negotiated".
Signed-off-by: Daiki Ueno <dueno@redhat.com>
Diffstat (limited to 'lib/tls-sig.c')
| -rw-r--r-- | lib/tls-sig.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/tls-sig.c b/lib/tls-sig.c index 75f88e5fbd..f512127ced 100644 --- a/lib/tls-sig.c +++ b/lib/tls-sig.c @@ -271,6 +271,7 @@ _gnutls_handshake_verify_data12(gnutls_session_t session, gnutls_datum_t dconcat; int ret; const version_entry_st *ver = get_version(session); + const gnutls_sign_entry_st *se = _gnutls_sign_to_entry(sign_algo); _gnutls_handshake_log ("HSK[%p]: verify TLS 1.2 handshake data: using %s\n", session, @@ -283,6 +284,12 @@ _gnutls_handshake_verify_data12(gnutls_session_t session, if (ret < 0) return gnutls_assert_val(ret); + if (unlikely(sign_supports_cert_pk_algorithm(se, cert->pubkey->params.algo) == 0)) { + _gnutls_handshake_log("HSK[%p]: certificate of %s cannot be combined with %s sig\n", + session, gnutls_pk_get_name(cert->pubkey->params.algo), se->name); + return gnutls_assert_val(GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER); + } + ret = _gnutls_session_sign_algo_enabled(session, sign_algo); if (ret < 0) @@ -356,11 +363,18 @@ _gnutls_handshake_verify_crt_vrfy12(gnutls_session_t session, { int ret; gnutls_datum_t dconcat; + const gnutls_sign_entry_st *se = _gnutls_sign_to_entry(sign_algo); ret = _gnutls_session_sign_algo_enabled(session, sign_algo); if (ret < 0) return gnutls_assert_val(ret); + if (unlikely(sign_supports_cert_pk_algorithm(se, cert->pubkey->params.algo) == 0)) { + _gnutls_handshake_log("HSK[%p]: certificate of %s cannot be combined with %s sig\n", + session, gnutls_pk_get_name(cert->pubkey->params.algo), se->name); + return gnutls_assert_val(GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER); + } + dconcat.data = session->internals.handshake_hash_buffer.data; dconcat.size = session->internals.handshake_hash_buffer_prev_len; @@ -567,6 +581,9 @@ _gnutls_handshake_sign_crt_vrfy12(gnutls_session_t session, gnutls_sign_algorithm_set_client(session, sign_algo); + if (unlikely(gnutls_sign_supports_pk_algorithm(sign_algo, pkey->pk_algorithm) == 0)) + return gnutls_assert_val(GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER); + _gnutls_debug_log("sign handshake cert vrfy: picked %s\n", gnutls_sign_algorithm_get_name(sign_algo)); |