/// <summary>
/// Gets the currently selected hash algorithm for the HASH command.
/// </summary>
internal FtpHashAlgorithm GetHashAlgorithmUnused()
{
FtpReply reply;
var type = FtpHashAlgorithm.NONE;
#if !CORE14
lock (m_lock) {
#endif
LogFunc(nameof(GetHashAlgorithmUnused));
if ((reply = Execute("OPTS HASH")).Success)
{
try {
type = HashAlgos.FromString(reply.Message);
}
catch (InvalidOperationException ex) {
// Do nothing
}
}
#if !CORE14
}
#endif
return(type);
}
/// <summary>
/// Gets the currently selected hash algorithm for the HASH command asynchronously.
/// </summary>
internal async Task <FtpHashAlgorithm> GetHashAlgorithmUnusedAsync(CancellationToken token = default(CancellationToken))
{
FtpReply reply;
var type = FtpHashAlgorithm.NONE;
LogFunc(nameof(GetHashAlgorithmUnusedAsync));
if ((reply = await ExecuteAsync("OPTS HASH", token)).Success)
{
try {
type = HashAlgos.FromString(reply.Message);
}
catch (InvalidOperationException ex) {
// Do nothing
}
}
return(type);
}
/// <summary>
/// Parses the recieved FTP hash response into a new FtpHash object.
/// </summary>
public static FtpHash Parse(string reply)
{
// Current draft says the server should return this:
// SHA-256 0-49 169cd22282da7f147cb491e559e9dd filename.ext
// Current version of FileZilla returns this:
// SHA-1 21c2ca15cf570582949eb59fb78038b9c27ffcaf
// Real reply that was failing:
// 213 MD5 0-170500096 3197bf4ec5fa2d441c0f50264ca52f11
var hash = new FtpHash();
// FIX #722 - remove the FTP status code causing a wrong hash to be returned
if (reply.StartsWith("2") && reply.Length > 10)
{
reply = reply.Substring(4);
}
Match m;
if (!(m = Regex.Match(reply,
@"(?<algorithm>.+)\s" +
@"(?<bytestart>\d+)-(?<byteend>\d+)\s" +
@"(?<hash>.+)\s" +
@"(?<filename>.+)")).Success)
{
m = Regex.Match(reply, @"(?<algorithm>.+)\s(?<hash>.+)\s");
}
if (m != null && m.Success)
{
hash.Algorithm = HashAlgorithms.FromString(m.Groups["algorithm"].Value);
hash.Value = m.Groups["hash"].Value;
}
else
{
// failed to parse
}
return(hash);
}
