wolfSSL remains agnostic to network socket behavior be it blocking or non-blocking. The non-blocking flag was meant for the default EmbedRecvFrom() callback for use with UDP to assist the timing of the handshake.
1. Deprecate wolfSSL_set_using_nonblock() and wolfSSL_get_using_nonblock() for use with TLS sockets. They become don't-cares when used with TLS sessions.
2. Added functions wolfSSL_dtls_set_using_nonblock() and wolfSSL_dtls_get_using_nonblock().
3. Removed a test case from EmbedReceive() that only applied to UDP.
4. Removed the checks for non-blocking sockets from EmbedReceive().
5. Socket timeouts only apply to DTLS sessions.
Support Draft 28: able to compile code to return BAD_BINDER if no PSKs
match and certificates not to be used.
Change key share implementation to use server preference - server now
checks each client key share's group is in supported_groups extension.
Client and server examples modified to support server preference.
Application can set client's and server's supported groups by rank.
Server's supported groups is sent back in encrypted_extensions if
preferred group is not in client's list - able to be turned off at
compile time.
Application can query server's preferred group from client.
Able to compile using 0x0304 as version instead of draft version.
Fix state machine in TLS 1.3 to support unexpected hello_retry_request.
Also fixes non-blocking.
Fix resumption to use the named group from session.
Fix named group in session structure to be a 2-byte field.
Better detection of errors in message flow.
Fix DoTls13ClientHello when downgrading - don't do TLS 1.3 things.
Not downgrading on client fixed.
Downgrade protocol version from TLS 1.3 when not TLS 1.3 ciphersuite.
Get downgrading from TLS 1.3 and resumption working.
Change earlyData value to an enum.
Support no extensions data (as opposed to zero length extension data) in
TLS 1.3 ClientHello.
Check PSK cipher suite is available to both client and server before
using.
Check first PSK identity chosen when server says it is using early data
at client.
Check PSK extension is last in client_hello on server.
Check the PSK cipher suite to use is supported on client.
Check the returned cipher suite for pre-shared keys is the same as
client expects.
Send alert decrypt_error when verification fails in certificate_verify
or finished message doesn't match calculated value.
Fail when certificate messages recieved in handshake when using PSK.
Validate on the server that EndOfEarlyData message has been recieved
before finished message when server sent EarlyData extension.
* More cleanup to move PEM functions from ssl.c to asn.c (`wolfSSL_CertPemToDer`, `wolfSSL_KeyPemToDer`, `wolfSSL_PubKeyPemToDer`). Renamed these API's to `wc_` and added backwards compatability macro for old function names.
* Added new internal function `wolfSSL_GetMaxRecordSize`.
* Modified tls_bench to use dynamic buffer based on max record size.
* Added comment for DTLS maxFragment calculation.
