ssh: add openssh controlmaster socket support

Adds support for establishing SSH sessions over an existing "ControlMaster" [unix domain] socket in proxy mode.

Details of the protocol can be found here: https://github.com/openssh/openssh-portable/blob/master/PROTOCOL.mux
More details about ControlMaster sockets can be found here: https://linux.die.net/man/5/ssh_config

Fixes golang/go#32958

Co-authored-by: Cyrus Katrak <ckatrak@slack-corp.com>
Change-Id: Ia3ae8893262f5060ed3fadfcbe97619c9659145b
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/733040
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Nicola Murino <nicola.murino@gmail.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
5 files changed
tree: 0cbf8b34e99bfcc7a66e0077fa0eb6fa70a058cf
  1. acme/
  2. argon2/
  3. bcrypt/
  4. blake2b/
  5. blake2s/
  6. blowfish/
  7. bn256/
  8. cast5/
  9. chacha20/
  10. chacha20poly1305/
  11. cryptobyte/
  12. curve25519/
  13. ed25519/
  14. hkdf/
  15. internal/
  16. md4/
  17. nacl/
  18. ocsp/
  19. openpgp/
  20. otr/
  21. pbkdf2/
  22. pkcs12/
  23. poly1305/
  24. ripemd160/
  25. salsa20/
  26. scrypt/
  27. sha3/
  28. ssh/
  29. tea/
  30. twofish/
  31. x509roots/
  32. xtea/
  33. xts/
  34. .gitattributes
  35. .gitignore
  36. codereview.cfg
  37. CONTRIBUTING.md
  38. go.mod
  39. go.sum
  40. LICENSE
  41. PATENTS
  42. README.md
README.md

Go Cryptography

Go Reference

This repository holds supplementary Go cryptography packages.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://go.dev/doc/contribute.

The git repository is https://go.googlesource.com/crypto.

The main issue tracker for the crypto repository is located at https://go.dev/issues. Prefix your issue with “x/crypto:” in the subject line, so it is easy to find.

Note that contributions to the cryptography package receive additional scrutiny due to their sensitive nature. Patches may take longer than normal to receive feedback.