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ssh fetcher: No longer allow deprecated and insecure DSA algorithm

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Hylke Bons 2016-06-09 18:56:07 -07:00 committed by Hylke Bons
parent b45b4c8165
commit 7f5b5e5b5b
2 changed files with 11 additions and 18 deletions
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15
Sparkles/SSHFetcher.cs
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@ -89,23 +89,16 @@ namespace Sparkles {
string FetchHostKey () string FetchHostKey ()
{ {
Logger.LogInfo ("Auth", "Fetching host key for " + RemoteUrl.Host); Logger.LogInfo ("Auth", string.Format ("Fetching host key for {0}", RemoteUrl.Host));
string [] key_types = {"rsa", "dsa", "ecdsa"}; var ssh_keyscan = new Command ("ssh-keyscan", string.Format ("-t rsa -p 22 {0}", RemoteUrl.Host));
foreach (string key_type in key_types) { if (RemoteUrl.Port > 0)
string args = "-t " + key_type + " " + "-p" + " "; ssh_keyscan.StartInfo.Arguments = string.Format ("-t rsa -p {0} {1}", RemoteUrl.Port, RemoteUrl.Host);
if (RemoteUrl.Port < 1)
args += "22 " + RemoteUrl.Host;
else
args += RemoteUrl.Port + " " + RemoteUrl.Host;
var ssh_keyscan = new Command ("ssh-keyscan", args);
string host_key = ssh_keyscan.StartAndReadStandardOutput (); string host_key = ssh_keyscan.StartAndReadStandardOutput ();
if (ssh_keyscan.ExitCode == 0 && !string.IsNullOrWhiteSpace (host_key)) if (ssh_keyscan.ExitCode == 0 && !string.IsNullOrWhiteSpace (host_key))
return host_key; return host_key;
}
return null; return null;
} }