tree c8d529ee92be688d186627a1b66e82d9faea2875
parent 78f6f05778692d25654fbdfafc4cb42fc058843e
author Hanno Becker <hanno.becker@arm.com> 1628342989 +0100
committer Hanno Becker <hanno.becker@arm.com> 1628342989 +0100

Add handshake message writing variant that doesn't update checksum

The helper `mbedtls_ssl_write_handshake_msg` writes a handshake message
and updates the handshake transcript.

With TLS 1.3, we need finer control over the checksum: updating
at message granularity is not sufficient. To allow for manual maintenance
of the checksum in those cases, refine `mbedtls_ssl_write_handshake_msg()`
into `mbedtls_ssl_write_handshake_msg_ext()` which takes a parameter
determining whether the checksum should be updated.

Signed-off-by: Hanno Becker <hanno.becker@arm.com>