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NativeDTLS 1.2 implementation in the Go programming language.

A long term goal is a professional security review, and maybe an inclusion in stdlib.

• RFC 6347:Datagram Transport Layer Security Version 1.2
• RFC 5705:Keying Material Exporters for Transport Layer Security (TLS)
• RFC 7627:Transport Layer Security (TLS) - Session Hash and Extended Master Secret Extension
• RFC 7301:Transport Layer Security (TLS) - Application-Layer Protocol Negotiation Extension

This will only be targeting DTLS 1.2, and the most modern/common cipher suites.We would love contributions that fall under the 'Planned Features' and any bug fixes!

• DTLS 1.2 Client/Server
• Key Exchange via ECDHE(curve25519, nistp256, nistp384) and PSK
• Packet loss and re-ordering is handled during handshaking
• Key export (RFC 5705)
• Serialization and Resumption of sessions
• Extended Master Secret extension (RFC 7627)
• ALPN extension (RFC 7301)

• TLS_ECDHE_ECDSA_WITH_AES_128_CCM (RFC 6655)
• TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 (RFC 6655)
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (RFC 5289)
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (RFC 5289)
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (RFC 5289)
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (RFC 5289)
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (RFC 8422)
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (RFC 8422)

• TLS_PSK_WITH_AES_128_CCM (RFC 6655)
• TLS_PSK_WITH_AES_128_CCM_8 (RFC 6655)
• TLS_PSK_WITH_AES_256_CCM_8 (RFC 6655)
• TLS_PSK_WITH_AES_128_GCM_SHA256 (RFC 5487)
• TLS_PSK_WITH_AES_128_CBC_SHA256 (RFC 5487)

• TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 (RFC 5489)

• Chacha20Poly1305

• DTLS 1.0
• Renegotiation
• Compression

This library needs at least Go 1.13, and you should haveGo modulesenabled.

For a DTLS 1.2 Server that listens on 127.0.0.1:4444

go run examples/listen/selfsign/main.go

For a DTLS 1.2 Client that connects to 127.0.0.1:4444

go run examples/dial/selfsign/main.go

Pion DTLS can connect to itself and OpenSSL.

  // Generate a certificate  openssl ecparam -out key.pem -name prime256v1 -genkey  openssl req -new -sha256 -key key.pem -out server.csr  openssl x509 -req -sha256 -days 365 -in server.csr -signkey key.pem -out cert.pem  // Use with examples/dial/selfsign/main.go  openssl s_server -dtls1_2 -cert cert.pem -key key.pem -accept 4444  // Use with examples/listen/selfsign/main.go  openssl s_client -dtls1_2 -connect 127.0.0.1:4444 -debug -cert cert.pem -key key.pem

Pion DTLS also comes with examples that do key exchange via PSK

go run examples/listen/psk/main.go

go run examples/dial/psk/main.go

  // Use with examples/dial/psk/main.go  openssl s_server -dtls1_2 -accept 4444 -nocert -psk abc123 -cipher PSK-AES128-CCM8  // Use with examples/listen/psk/main.go  openssl s_client -dtls1_2 -connect 127.0.0.1:4444 -psk abc123 -cipher PSK-AES128-CCM8

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MIT License - seeLICENSE for full text