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SessionOptions.cs
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SessionOptions.cs
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using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;
using System.Globalization;
using System.Security;
namespace WinSCP
{
[Guid("F25C49A5-74A6-4E8F-AEB4-5B4E0DDF0EF9")]
[ComVisible(true)]
public enum Protocol
{
Sftp = 0,
Scp = 1,
Ftp = 2,
Webdav = 3,
}
[Guid("D924FAB9-FCE7-47B8-9F23-5717698384D3")]
[ComVisible(true)]
public enum FtpMode
{
Passive = 0,
Active = 1,
}
[Guid("F2FC81EB-4761-4A4E-A3EC-4AFDD474C18C")]
[ComVisible(true)]
public enum FtpSecure
{
None = 0,
Implicit = 1,
Explicit = 3,
}
[Guid("2D4EF368-EE80-4C15-AE77-D12AEAF4B00A")]
[ClassInterface(Constants.ClassInterface)]
[ComVisible(true)]
public sealed class SessionOptions
{
public SessionOptions()
{
Timeout = new TimeSpan(0, 0, 15);
RawSettings = new Dictionary<string,string>();
}
public Protocol Protocol { get; set; }
public string HostName { get; set; }
public int PortNumber { get { return _portNumber; } set { SetPortNumber(value); } }
public string UserName { get; set; }
public string Password { get { return GetPassword(); } set { SetPassword(value); } }
public SecureString SecurePassword { get; set; }
public TimeSpan Timeout { get { return _timeout; } set { SetTimeout(value); } }
public int TimeoutInMilliseconds { get { return Tools.TimeSpanToMilliseconds(Timeout); } set { Timeout = Tools.MillisecondsToTimeSpan(value); } }
public string PrivateKeyPassphrase { get; set; }
// SSH
public string SshHostKeyFingerprint { get { return _sshHostKeyFingerprint; } set { SetSshHostKeyFingerprint(value); } }
public bool GiveUpSecurityAndAcceptAnySshHostKey { get; set; }
public string SshPrivateKeyPath { get; set; }
[Obsolete("Use PrivateKeyPassphrase")]
public string SshPrivateKeyPassphrase { get { return PrivateKeyPassphrase; } set { PrivateKeyPassphrase = value; } }
// FTP
public FtpMode FtpMode { get; set; }
public FtpSecure FtpSecure { get; set; }
// WebDAV
public bool WebdavSecure { get; set; }
public string WebdavRoot { get { return _webdavRoot; } set { SetWebdavRoot(value); } }
// TLS
public string TlsHostCertificateFingerprint { get { return _tlsHostCertificateFingerprint; } set { SetHostTlsCertificateFingerprint(value); } }
public bool GiveUpSecurityAndAcceptAnyTlsHostCertificate { get; set; }
public string TlsClientCertificatePath { get; set; }
public void AddRawSettings(string setting, string value)
{
RawSettings.Add(setting, value);
}
public void ParseUrl(string url)
{
if (url == null)
{
throw new ArgumentNullException("url");
}
url = url.Trim();
const string protocolSeparator = "://";
int index = url.IndexOf(protocolSeparator, StringComparison.OrdinalIgnoreCase);
if (index < 0)
{
throw new ArgumentException("Protocol not specified", "url");
}
string protocol = url.Substring(0, index).Trim();
if (!ParseProtocol(protocol))
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "Unknown protocol {0}", protocol), "url");
}
url = url.Substring(index + protocolSeparator.Length).Trim();
index = url.IndexOf('/');
WebdavRoot = null;
if (index >= 0)
{
string path = url.Substring(index).Trim();
url = url.Substring(0, index).Trim();
string parameters = path;
path = CutToChar(ref parameters, ';');
if (!string.IsNullOrEmpty(path) && (path != "/"))
{
if (Protocol != Protocol.Webdav)
{
throw new ArgumentException("Root folder can be specified for WebDAV protocol only", "url");
}
WebdavRoot = path;
}
// forward compatibility
if (!string.IsNullOrEmpty(parameters))
{
throw new ArgumentException("No session parameters are supported", "url");
}
}
index = url.LastIndexOf('@');
string hostInfo;
string userInfo = null;
if (index >= 0)
{
userInfo = url.Substring(0, index).Trim();
hostInfo = url.Substring(index + 1).Trim();
}
else
{
hostInfo = url;
}
PortNumber = 0;
string portNumber = null;
if ((hostInfo.Length >= 2) && (hostInfo[0] == '[') && ((index = hostInfo.IndexOf(']')) > 0))
{
HostName = hostInfo.Substring(1, index - 1).Trim();
hostInfo = hostInfo.Substring(index + 1).Trim();
if (hostInfo.Length > 0)
{
if (hostInfo[0] != ':')
{
throw new ArgumentException("Unexpected syntax after ]", "url");
}
else
{
portNumber = hostInfo.Substring(1);
}
}
}
else
{
HostName = UriUnescape(CutToChar(ref hostInfo, ':'));
portNumber = hostInfo;
}
if (string.IsNullOrEmpty(HostName))
{
throw new ArgumentException("No host name", "url");
}
if (string.IsNullOrEmpty(portNumber))
{
PortNumber = 0;
}
else
{
portNumber = UriUnescape(portNumber);
int number;
if (!int.TryParse(portNumber, 0, CultureInfo.InvariantCulture, out number))
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, "{0} is not a valid port number", portNumber), "url");
}
else
{
PortNumber = number;
}
}
UserName = null;
Password = null;
SshHostKeyFingerprint = null;
GiveUpSecurityAndAcceptAnySshHostKey = false;
TlsHostCertificateFingerprint = null;
GiveUpSecurityAndAcceptAnyTlsHostCertificate = false;
if (!string.IsNullOrEmpty(userInfo))
{
string parameters = userInfo;
userInfo = CutToChar(ref parameters, ';');
UserName = EmptyToNull(UriUnescape(CutToChar(ref userInfo, ':')));
Password = EmptyToNull(UriUnescape(userInfo));
while (!string.IsNullOrEmpty(parameters))
{
string parameter = CutToChar(ref parameters, ';');
string parameterName = CutToChar(ref parameter, '=');
if (parameterName.Equals("fingerprint", StringComparison.OrdinalIgnoreCase))
{
SshHostKeyFingerprint = parameter;
}
else
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "Unsupported connection parameter {0}", parameterName), "url");
}
}
}
}
private bool ParseProtocol(string protocol)
{
bool result = true;
FtpSecure = FtpSecure.None;
if (protocol.Equals("sftp", StringComparison.OrdinalIgnoreCase))
{
Protocol = Protocol.Sftp;
}
else if (protocol.Equals("scp", StringComparison.OrdinalIgnoreCase))
{
Protocol = Protocol.Scp;
}
else if (protocol.Equals("ftp", StringComparison.OrdinalIgnoreCase))
{
Protocol = Protocol.Ftp;
}
else if (protocol.Equals("ftps", StringComparison.OrdinalIgnoreCase))
{
Protocol = Protocol.Ftp;
FtpSecure = FtpSecure.Implicit;
}
else if (protocol.Equals("ftpes", StringComparison.OrdinalIgnoreCase))
{
Protocol = Protocol.Ftp;
FtpSecure = FtpSecure.Explicit;
}
else if (protocol.Equals("http", StringComparison.OrdinalIgnoreCase))
{
Protocol = Protocol.Webdav;
}
else if (protocol.Equals("https", StringComparison.OrdinalIgnoreCase))
{
Protocol = Protocol.Webdav;
WebdavSecure = true;
}
else
{
result = false;
}
return result;
}
private static string EmptyToNull(string s)
{
if (string.IsNullOrEmpty(s))
{
return null;
}
else
{
return s;
}
}
private static string UriUnescape(string s)
{
return Uri.UnescapeDataString(s);
}
private static string CutToChar(ref string s, char c)
{
int index = s.IndexOf(c);
string result;
if (index >= 0)
{
result = s.Substring(0, index).Trim();
s = s.Substring(index + 1).Trim();
}
else
{
result = s;
s = string.Empty;
}
return result;
}
internal Dictionary<string, string> RawSettings { get; private set; }
internal bool IsSsh { get { return (Protocol == Protocol.Sftp) || (Protocol == Protocol.Scp); } }
internal bool IsTls { get { return GetIsTls(); } }
private bool GetIsTls()
{
return
((Protocol == Protocol.Ftp) && (FtpSecure != FtpSecure.None)) ||
((Protocol == Protocol.Webdav) && WebdavSecure);
}
private void SetSshHostKeyFingerprint(string s)
{
if (s != null)
{
Match match = _sshHostKeyRegex.Match(s);
if (!match.Success || (match.Length != s.Length))
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "SSH host key fingerprint \"{0}\" does not match pattern /{1}/", s, _sshHostKeyRegex));
}
}
_sshHostKeyFingerprint = s;
}
private void SetHostTlsCertificateFingerprint(string s)
{
if (s != null)
{
Match match = _tlsCertificateRegex.Match(s);
if (!match.Success || (match.Length != s.Length))
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, "TLS host certificate fingerprint \"{0}\" does not match pattern /{1}/", s, _tlsCertificateRegex));
}
}
_tlsHostCertificateFingerprint = s;
}
private void SetTimeout(TimeSpan value)
{
if (value <= TimeSpan.Zero)
{
throw new ArgumentException("Timeout has to be positive non-zero value");
}
_timeout = value;
}
private void SetPortNumber(int value)
{
if (value < 0)
{
throw new ArgumentException("Port number cannot be negative");
}
_portNumber = value;
}
private void SetWebdavRoot(string value)
{
if (!string.IsNullOrEmpty(value) && (value[0] != '/'))
{
throw new ArgumentException("WebDAV root path has to start with slash");
}
_webdavRoot = value;
}
private void SetPassword(string value)
{
if (value == null)
{
SecurePassword = null;
}
else
{
SecurePassword = new SecureString();
foreach (char c in value)
{
SecurePassword.AppendChar(c);
}
}
}
private string GetPassword()
{
if (SecurePassword == null)
{
return null;
}
else
{
IntPtr ptr = IntPtr.Zero;
try
{
ptr = Marshal.SecureStringToGlobalAllocUnicode(SecurePassword);
return Marshal.PtrToStringUni(ptr);
}
finally
{
Marshal.ZeroFreeGlobalAllocUnicode(ptr);
}
}
}
private string _sshHostKeyFingerprint;
private string _tlsHostCertificateFingerprint;
private TimeSpan _timeout;
private int _portNumber;
private string _webdavRoot;
private const string _listPattern = @"{0}(;{0})*";
private const string _sshHostKeyPattern = @"((ssh-rsa|ssh-dss)( |-))?(\d+ )?([0-9a-f]{2}(:|-)){15}[0-9a-f]{2}";
private static readonly Regex _sshHostKeyRegex =
new Regex(string.Format(CultureInfo.InvariantCulture, _listPattern, _sshHostKeyPattern));
private const string _tlsCertificatePattern = @"([0-9a-f]{2}:){19}[0-9a-f]{2}";
private static readonly Regex _tlsCertificateRegex =
new Regex(string.Format(CultureInfo.InvariantCulture, _listPattern, _tlsCertificatePattern));
}
}