ssh: support rsa-sha2-256/512 for client certificates

The server-sig-algs logic was not working for certificate algorithms.
Follow-up on CL 392394.

Tested with OpenSSH 8.8 configured with

    PubkeyAcceptedKeyTypes -ssh-rsa-cert-v01@openssh.com

Updates golang/go#39885
For golang/go#49952

Change-Id: Ic230dd6f98e96b7938acbd0128ab37d33b70abe5
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/392974
Trust: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2 files changed
tree: 127b7778fbf8c8aaf40ee87fbc57d3a18536b9ad
  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. xtea/
  32. xts/
  33. .gitattributes
  34. .gitignore
  35. AUTHORS
  36. codereview.cfg
  37. CONTRIBUTING.md
  38. CONTRIBUTORS
  39. go.mod
  40. go.sum
  41. LICENSE
  42. PATENTS
  43. README.md
README.md

Go Cryptography

Go Reference

This repository holds supplementary Go cryptography libraries.

Download/Install

The easiest way to install is to run go get -u golang.org/x/crypto/.... You can also manually git clone the repository to $GOPATH/src/golang.org/x/crypto.

Report Issues / Send Patches

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

The main issue tracker for the crypto repository is located at https://github.com/golang/go/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.