public virtual bool SetKey(string Host, string HostKeyName, string Fingerprint)
{
var hostData = new KnownHostValue()
{
HostKeyName = HostKeyName,
Fingerprint = Fingerprint,
};
HostKeys.AddOrUpdate(Host, hostData, (key, oldValue) => {
return(hostData);
});
return(OnKeyUpdated());
}
public void LoadFromDisk()
{
if (File.Exists(FileName))
{
foreach (var line in File.ReadAllLines(FileName))
{
// skip emty lines or comments
// skip @cert-authority and @revoked because we do not validate
if (line.Length < 1 || line[0] == '#' || line[0] == '@')
{
continue;
}
var hostparts = line.Split(' ');
// Skip invalid lines
if (hostparts.Length < 3 || hostparts[0].Length < 1)
{
continue;
}
var(hostname, keyName, pubKey) = (hostparts[0], hostparts[1], hostparts[2]);
string fingerprint;
using (var md5 = MD5.Create())
{
var pubkey = Convert.FromBase64String(pubKey);
var fp_as_bytes = md5.ComputeHash(pubkey);
// commented out because realization below encode bytes 10,01,10 as 10:1:10 instead of classic 10:01:10
// so make it compatible
// fingerprint = System.BitConverter.ToString(fp_as_bytes).Replace('-', ':').ToLower();
var sb = new StringBuilder();
foreach (var b in fp_as_bytes)
{
sb.AppendFormat("{0:x}:", b);
}
fingerprint = sb.ToString().Remove(sb.ToString().Length - 1);
}
// hashed hostname, can be only one on line
if (hostname[0] == '|')
{
var hashparts = hostname.Split('|');
// skip invalid or unsupported lines
if (hashparts.Length < 4 || hashparts[1] != "1")
{
continue;
}
hashedKeys.Add(
new HashedKeysStruct()
{
Salt = Convert.FromBase64String(hashparts[2]),
HostHash = hashparts[3],
KeyName = keyName,
Fingerprint = fingerprint,
}
);
}
else
{
foreach (var host in hostname.Split(','))
{
// TODO: there can be [host]:port values.
// We do not support it because we do not know the port
if (host.Length < 1 || host[0] == '[')
{
continue;
}
var(tmpHost, tmpFingerprint) = (host, fingerprint);
if (host[0] == '!') // Host connection denied
{
tmpHost = host.Substring(1); // clean '!'
tmpFingerprint = '!' + fingerprint; // make fingerprint for this host invalid
}
// wildcard pattern
else if (WildcardPattern.ContainsWildcardCharacters(host))
{
wildcardKeys.Add(
new WildcardKeysStruct()
{
Pattern = new WildcardPattern(tmpHost),
KeyName = keyName,
Fingerprint = tmpFingerprint,
}
);
}
// simple host
else
{
var hostData = new KnownHostValue()
{
HostKeyName = keyName,
Fingerprint = tmpFingerprint,
};
HostKeys.AddOrUpdate(tmpHost, hostData, (key, oldValue) => {
return(hostData);
});
}
}
}
}
}
}
