We need to fully check if the provided session ticket could be
used in the handshake, so that we wouldn't cause handshake
failure in some cases. Here we bring f8e50a9 back.
Example scenario:
A client proposes to a server, that supports only the psk_ephemeral
key exchange mode, two tickets, the first one is allowed only for
pure PSK key exchange mode and the second one is psk_ephemeral only.
We need to select the second tickets instead of the first one whose
ticket_flags forbid psk_ephemeral and thus cause a handshake
failure.
Signed-off-by: Pengyu Lv <pengyu.lv@arm.com>
If the server during a TLS 1.3 handshake selects
the PSK key exchange mode, it does not matter
if it did not find in the key share extension
a key share for a group it supports. Such a
key share is used and necessary only in the
case of the ephemeral or PSK ephemeral key
exchange mode. This is a possible scenario in
the case of a server that supports only the PSK
key exchange mode and a client that also
supports a key exchange mode with ephemeral keys.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Large static inline functions used from several translation units in the
library are bad for code size as we end up with multiple copies. Use the
actual function instead. There's already a comment that says so.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
As usual, just a search-and-replace plus:
1. Removing things from hash_info.[ch]
2. Adding new auto-enable MD_LIGHT in build-info.h
3. Including md_psa.h where needed
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
Check for TLS 1.3 version first when parsing
the supported versions extension as it is
the most likely version.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
Postpone TLS 1.3 cipher suite selection
when we are sure we negotiate the version
1.3 of the protocol.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
To avoid doing it twice in case we eventually
negotiate the version 1.2 of the protocol,
postpone the copy of the legacy session id.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
To avoid doing it twice in case we eventually
negotiate the version 1.2 of the protocol,
postpone the copy of the client random
bytes.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
When parsing the ClientHello message,
move the setting of the TLS version
to TLS 1.3 after the computation of
the end of the list of cipher suites.
At that point we are able to compute
the address and end address of the
list of extensions and thus able to
search and parse the supported_versions
extension to select which version
of the TLS protocol we are going to
negotiate.
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
