ECDSA keys don't work with LDAP sync

[xor-gate]

• Gitea version (or commit ref): 1.5.0+rc1-249-g4090204 (latest HEAD)
• Git version: n.a
• Operating system: Linux (debian 8)
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant

Description

LDAP sync doesn't work with ECDSA keys because the algo string check is hardcoded instead of using ssh.ParseAuthorizedKey.

2018/10/16 10:15:49 [W] addLdapSSHPublicKeys[auth.example.com]: Skipping invalid LDAP Public SSH Key for user jjacobs: ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAE1igxlv03cX/DzPgLyOtd554AZD+FTxpM80cfIcOfEiRG6KgDRWqhlezHWfMytPhTHICnXIP4d5qg72ITWt1FGFQAsWCQoRDK6/FsQ1eYuBGmesF0oK/MQyyiWdula8RWCb+3IuxiJzvN81V0iel7WTNw8MzTRqIm0ikdiNc+canhRkw==
2018/10/16 10:19:59 [T] ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAE1igxlv03cX/DzPgLyOtd554AZD+FTxpM80cfIcOfEiRG6KgDRWqhlezHWfMytPhTHICnXIP4d5qg72ITWt1FGFQAsWCQoRDK6/FsQ1eYuBGmesF0oK/MQyyiWdula8RWCb+3IuxiJzvN81V0iel7WTNw8MzTRqIm0ikdiNc+canhRkw==

Solution

https://github.com/go-gitea/gitea/blob/master/models/user.go#L1458

Should become

                _, _, _, _, err := ssh.ParseAuthorizedKey([]byte(sshKey))
                if err == nil {

[xor-gate]

Hi Guys,

I could create a PR for this as I have tested it and works fine with parsing in a normal way instead of checking for a limited ssh prefix.

Just let me know.

Kind regards,
Jerry Jacobs

[techknowlogick]

@xor-gate PRs are always welcome 😄