Raises exception when loading SSH Keys with using windows new lines

[Antsiscool]

Expected behaviour

When connecting to an SFTP server using an SSH key for authentication it should be able to connect when using the correct key. This should happen regardless of the new lines.

Actual behaviour

When the key is formatted using windows new lines (\r\n) an argument error is raised:

ArgumentError (Expected -----BEGIN OPENSSH PRIVATE KEY-----)
 at start of private key

System configuration

• net-ssh 7.2.0

Example App

Using the sample private key from test/integration/test_agent.rb

private_key = <<~EOF
  -----BEGIN OPENSSH PRIVATE KEY-----
  b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
  QyNTUxOQAAACDuVIPDUXcVkXOyNAaFsotbySHLNG/Gw6gc3j2k2zcRVAAAAKD6bG5++mxu
  fgAAAAtzc2gtZWQyNTUxOQAAACDuVIPDUXcVkXOyNAaFsotbySHLNG/Gw6gc3j2k2zcRVA
  AAAEAydU4FtZ9+5o5Y/m1aPNHFda37Fm0Us5FlUKx50tWw+e5Ug8NRdxWRc7I0BoWyi1vJ
  Ics0b8bDqBzePaTbNxFUAAAAGmJhcnRsZUBCYXJ0bGVzLU1hY0Jvb2stUHJvAQID
  -----END OPENSSH PRIVATE KEY-----
EOF

Net::SSH::Authentication::ED25519::OpenSSHPrivateKeyLoader.read(private_key, nil)

private_key = <<~EOF
  -----BEGIN OPENSSH PRIVATE KEY-----
  b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
  QyNTUxOQAAACDuVIPDUXcVkXOyNAaFsotbySHLNG/Gw6gc3j2k2zcRVAAAAKD6bG5++mxu
  fgAAAAtzc2gtZWQyNTUxOQAAACDuVIPDUXcVkXOyNAaFsotbySHLNG/Gw6gc3j2k2zcRVA
  AAAEAydU4FtZ9+5o5Y/m1aPNHFda37Fm0Us5FlUKx50tWw+e5Ug8NRdxWRc7I0BoWyi1vJ
  Ics0b8bDqBzePaTbNxFUAAAAGmJhcnRsZUBCYXJ0bGVzLU1hY0Jvb2stUHJvAQID
  -----END OPENSSH PRIVATE KEY-----
EOF

private_key = private_key.gsub("\n", "\r\n")

Net::SSH::Authentication::ED25519::OpenSSHPrivateKeyLoader.read(private_key, nil)

[mfazekas]

@Antsiscool thanks much for the report. 👍 Can you make a PR fixing it?

[Antsiscool]

I have made a PR #922