• Added AES-ECB, SHA-3 and SHAKE-256 support to the wolfssl plugin.
• Added AES-CCM support to the openssl plugin (#353).
• The x509 and the openssl plugins now consider the authorityKeyIdentifier, if available, before verifying signatures, which avoids unnecessary signature verifications after a CA key rollover if both CA certificates are loaded. The openssl plugin now does the same also for CRLs (the x509 plugin already did).
• The pkcs11 plugin better handles optional attributes like CKA_TRUSTED, which previously depended on a version check (6537be9c8d56ba3f3855822c2f1b833f01a1bd25).
• The NetworkManager backend (charon-nm) now supports using SANs as client identities, not only full DNs (#437).
• charon-tkm now handles IKE encryption.
• Send a MOBIKE update again if a a change in the NAT mappings is detected but the endpoints stay the same (e143a7dbf8b07894f7a0d31cd2f6b11f9355629c).
• A deadlock in the HA plugin introduced with 5.9.2 has been fixed (#456).
• DSCP values are now also set for NAT keepalives.
• The ike_derived_keys() hook now receives more keys but in a different order (4e29d6fac129dff25fc8761910a70e98e27ddc7c).
• Converted most of the test case scenarios to the vici interface.

Refer to the 5.9.3 milestone for a list of all closed issues and pull requests.