Links

[larshp]

https://git-scm.com/book/en/v2/Git-on-the-Server-The-Protocols

https://datatracker.ietf.org/doc/html/rfc4251 - The Secure Shell (SSH) Protocol Architecture
https://datatracker.ietf.org/doc/html/rfc4252 - The Secure Shell (SSH) Authentication Protocol
https://datatracker.ietf.org/doc/html/rfc4253 - The Secure Shell (SSH) Transport Layer Protocol
https://datatracker.ietf.org/doc/html/rfc4254 - The Secure Shell (SSH) Connection Protocol

Note: the TCP client in ABAP is a mess, and SSH is not a good fit, so frame sizes will probably have to be 1 byte making it very slow, but this maybe be okay for some scenarios. Or https://datatracker.ietf.org/doc/html/rfc4253#section-6 ?

https://www.synopsys.com/software-integrity/security-testing/fuzz-testing/defensics/protocols/ssh2-server.html

https://docs.github.com/en/developers/overview/managing-deploy-keys#deploy-keys

https://github.com/billchurch/webssh2
https://github.com/mscdex/ssh2

[larshp]

there is padding and the packet length is also encrypted => back to 1 byte packages, argh

https://goteleport.com/blog/ssh-handshake-explained/

https://datatracker.ietf.org/doc/html/rfc5656 - Elliptic Curve Algorithm Integration in the Secure Shell Transport Layer
https://datatracker.ietf.org/doc/html/rfc4432 - RSA Key Exchange for the Secure Shell (SSH) Transport Layer Protocol

https://www.cs.ru.nl/E.Poll/papers/ssh.pdf

https://en.wikipedia.org/wiki/Elliptic-curve_Diffie%E2%80%93Hellman
https://en.wikipedia.org/wiki/Elliptic-curve_cryptography
https://en.wikipedia.org/wiki/Curve25519
https://en.wikipedia.org/wiki/Elliptic_curve_point_multiplication
https://answers.sap.com/questions/13354327/elliptic-curve-digital-signature-algorithm-ecdsa-i.html
https://blog.cloudflare.com/a-relatively-easy-to-understand-primer-on-elliptic-curve-cryptography/

https://github.com/dalek-cryptography/ed25519-dalek
https://github.com/dalek-cryptography/x25519-dalek