Released: Mar 3, 2021

R5.1 での更新項目

機能

• All: Changed release naming scheme ('R5.1' instead of '2020 R5.1').
• Networking: More meaningful exception is throw when attempting to use HTTP CONNECT proxy with NTLM authentication on platforms that don't support it.
• Networking: Optimized timeout infrastructure in ProxySocket.Connect.
• TLS Core: Added VerifyMessage signature algorithm logging in TLS 1.3.
• TLS Core: Close/Dispose method called on TLS 1.3 socket ensures that all outstanding IO operations are canceled before the control is returned to the caller.
• TLS Core: Synchronous methods on TlsSocket wrap TaskCanceledException to TlsException.
• Cryptography: Enhanced implicit operator for conversion of Certificate->X509Certificate2 to retain private keys on non-Microsoft Windows platforms as well.
• Cryptography: Optimized memory usage in symmetric encryption transformations based on Windows CNG API.
• Cryptography: Substantial speed-up of ChaCha20/Poly1305 (used in SSH and TLS). Utilizing AVX2 or Advanced NEON SIMD on Microsoft .NET 5.0 (if available).
• Common: Accelerated common byte array operations in .NET 5.0 on devices with AVX2 support.

不具合の修正

• FTP: Added workaround for PureFTPd server's handling of NOOP command.
• Networking: Added workaround for rare WSAEWOULDBLOCK error on Mono in Socket.Connect.
• SSH: Fixed format of SshPublicKey.GetPublicKey() response for public keys initialized from PublicKeyInfo or AsymmetricAlgorithm.
• SSH: Fixed handling of unknown channel requests (not sending reply if not requested).
• SSH: Added workaround for WingFTPServer server that uses 'ssh-rsa' with SHA-2 when client announces RSA/SHA-2 support.
• TLS Core: Fixed possible rare NullReferenceException when closing TLS 1.3 session.
• Cryptography: Fixed Ed25519 PKCS #8 key structure (now compatible with OpenSSL).
• Cryptography: Added workaround to Certificate.LoadDer method to enable loading of certificates in PKCS #7 containers.