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ssh: Use SHA256 > MD5 for key fingerprinting

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This commit is contained in:
Hylke Bons 2016-04-09 07:37:50 -07:00
parent 454a839570
commit 66f447c457
1 changed files with 12 additions and 9 deletions
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21
Sparkles/SSHFetcher.cs
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@ -122,19 +122,22 @@ namespace Sparkles {
}
private string DeriveFingerprint (string public_key)
string DeriveFingerprint (string public_key)
{
try {
MD5 md5 = new MD5CryptoServiceProvider ();
string key = public_key.Split (" ".ToCharArray ()) [2];
byte [] b64_bytes = Convert.FromBase64String (key);
byte [] md5_bytes = md5.ComputeHash (b64_bytes);
string fingerprint = BitConverter.ToString (md5_bytes);
SHA256 sha256 = new SHA256CryptoServiceProvider ();
string key = public_key.Split (" ".ToCharArray ()) [2];
byte [] base64_bytes = Convert.FromBase64String (key);
byte [] sha256_bytes = sha256.ComputeHash (base64_bytes);
string fingerprint = BitConverter.ToString (sha256_bytes);
Console.WriteLine( fingerprint.ToLower ().Replace ("-", ":"));
return fingerprint.ToLower ().Replace ("-", ":");
} catch (Exception e) {
Logger.LogInfo ("Fetcher", "Failed creating fingerprint: " + e.Message + " " + e.StackTrace);
Logger.LogInfo ("Fetcher", "Failed to create fingerprint: " + e.Message + " " + e.StackTrace);
return null;
}
}