Fix handling of ServerHello in TLS v1.3 to support TLS v1.2 when
downgrading.
Added support in client and server examples for using downgrade method:
wolfSSLv23_client_method_ex() or wolfSSLv23_server_method_ex().
Add tests, using downgrade version, of client or server downgrading from
TLS v1.3 to TLS v1.2.
* Fixes to support certificate generation (`WOLFSSL_CERT_GEN`) without RSA enabled.
* Added new ECC CA for 384-bit tests.
* Created new server cert chain (ECC CA for 256-bit that signs server-ecc.pem)
* Created new `./certs/ecc/genecc.sh` script for generating all ECC CA's, generated server cert req (CSR), signing with CA and the required CRL.
* Moved the wolfCrypt ECC CA / ECC cert gen test into `ecc_test` as `ecc_test_cert_gen`.
* Refactor duplicate code that saves DER to disk, converts DER to PEM and saves PEM to disk into SaveDerAndPem function.
* Changed `ecc_test_make_pub` and `ecc_test_key_gen` to use XMALLOC for temp buffers (uses heap instead of stack).
* Cleanup to combine all certificate subject information into global `certDefaultName`.
* Updated cert request info to use wolfSSL instead of Yassl.
* Cleanup to combine keyUsage into `certKeyUsage` and `certKeyUsage2`.
* Re-number error codes in rsa_test.
* Moved the certext_test after the ecc_test, since it uses a file generated in `ecc_test_cert_gen`.
Change SupportedVersions extension to only include TLS v1.3 if downgrade
is disabled.
Fix parsing of SupportedVersions extension
Don't upgrade
Only downgrade in SupportedVersions extension if option enabled
Changed the define in configure.ac to match the one used in the code.
Fixed downgrading to disallow unless ssl->options.downgrade is set.
TLS 1.3 client method does not have downgrade on anymore.
Test changed to not expect downgrading to work.
Test of TLS v1.3 client downgrade is actually upgrading on server.
Fixed 80 character line problems.
Reset list of supported sig algorithms before sending certificate
request on server.
Refactored setting of ticket for both TLS13 and earlier.
Remember the type of key for deciding which sig alg to use with TLS13
CertificateVerify.
RSA PKCS #1.5 not allowed in TLS13 for CertificateVerify.
Remove all remaining DTLS code as spec barely started.
Turn off SHA512 code where decision based on cipher suite hash.
Fix fragment handling to work with encrypted messages.
Test public APIS.
Fix TLS13 cipher suite name to CHACHA20
Include SignatureAlgorithm in older versions of TLS when compiling for
TLS v1.3.
BIT STRING unused bits doesn't necessarily indicate last unused bit.
Fix ecc_dsa_sa_algo value.
1. Make new CA cert for test that is both client-cert.pem andr
client-ecc-cert.pem.
2. Use the new client-ca.pem cert in the test script.
3. Update renewcerts script to generate client-ca.pem.
