This commit adapts the ClientHello parsing routines in ssl_srv.c
to use the ciphersuite traversal macros
MBEDTLS_SSL_BEGIN_FOR_EACH_CIPHERSUITE
MBEDTLS_SSL_END_FOR_EACH_CIPHERSUITE
introduced in the last commit, thereby making them work
both with and without MBEDTLS_SSL_SINGLE_CIPHERSUITE.
Another notable change concerns the ssl_ciphersuite_match:
Previous, this function would take a ciphersuite ID and a
pointer to a destination ciphersuite info structure as input
and write eithe NULL or a valid ciphersuite info structure
to that destination address, depending on whether the suite
corresponding to the given ID was suitable or not. The
function would always return 0 outside of a fatal error.
This commit changes this to ssl_ciphersuite_is_match() which
instead already takes a ciphersuite handle (which outside
of a hardcoded ciphersuite is the same as the ptr to a
ciphersuite info structure) and returns 0 or 1 (or a
negative error code in case of a fatal error) indicating
whether the suite corresponding to the handle was acceptable
or not. The conversion of the ciphersuite ID to the ciphersuite
info structure is done prior to calling ssl_ciphersuite_is_match().
2d46b4f2a1