Secure String Helper Class
public class SecureStringHelper : IDisposable
{
private readonly Encoding _encoding;
private readonly SecureString _secureString;
private byte[] _bytes;
private bool _disposed;
public SecureStringHelper(SecureString secureString) : this(secureString, Encoding.Default)
{
}
public SecureStringHelper(SecureString secureString, Encoding encoding)
{
if(secureString == null)
throw new Exception(nameof(secureString));
_encoding = encoding ?? Encoding.Default;
_secureString = secureString;
}
public void Dispose()
{
if(!_disposed)
{
Destroy();
_disposed = true;
}
GC.SuppressFinalize(this);
}
public static string ToString(SecureString secureStr)
{
var Str = new NetworkCredential(string.Empty, secureStr).Password;
return Str;
}
public static SecureString ToSecureString(string password)
{
if(password == null)
throw new Exception("Error: Password cannot be null.");
var securePassword = new SecureString();
foreach(var c in password)
securePassword.AppendChar(c);
securePassword.MakeReadOnly();
return securePassword;
}
internal unsafe byte[] ToByteArray()
{
if(_bytes != null)
{
_bytes.Fill(0);
_bytes = null;
}
var maxLength = _encoding.GetMaxByteCount(_secureString.Length);
var bytes = IntPtr.Zero;
var str = IntPtr.Zero;
try
{
bytes = Marshal.AllocHGlobal(maxLength);
str = Marshal.SecureStringToBSTR(_secureString);
var chars = (char*) str.ToPointer();
var bptr = (byte*) bytes.ToPointer();
var len = _encoding.GetBytes(chars, _secureString.Length, bptr, maxLength);
_bytes = new byte[len];
for(var i = 0; i < len; ++i)
{
_bytes[i] = *bptr;
bptr++;
}
return _bytes;
}
finally
{
if(bytes != IntPtr.Zero)
Marshal.FreeHGlobal(bytes);
if(str != IntPtr.Zero)
Marshal.ZeroFreeBSTR(str);
}
}
private void Destroy()
{
if(_bytes != null)
{
_bytes.Fill(0);
_bytes = null;
}
}
}
public static class SecureStringEx
{
/// <summary>
/// Converts a standard string to a secure string
/// </summary>
public static SecureString ToSecureString(this string password)
{
if(password == null)
throw new Exception("Error: Password cannot be null.");
var securePassword = new SecureString();
foreach(var c in password)
securePassword.AppendChar(c);
securePassword.MakeReadOnly();
return securePassword;
}
}
public class SecureStringHelper : IDisposable
{
private readonly Encoding _encoding;
private readonly SecureString _secureString;
private byte[] _bytes;
private bool _disposed;
public SecureStringHelper(SecureString secureString) : this(secureString, Encoding.Default)
{
}
public SecureStringHelper(SecureString secureString, Encoding encoding)
{
if(secureString == null)
throw new Exception(nameof(secureString));
_encoding = encoding ?? Encoding.Default;
_secureString = secureString;
}
public void Dispose()
{
if(!_disposed)
{
Destroy();
_disposed = true;
}
GC.SuppressFinalize(this);
}
public static string ToString(SecureString secureStr)
{
var Str = new NetworkCredential(string.Empty, secureStr).Password;
return Str;
}
public static SecureString ToSecureString(string password)
{
if(password == null)
throw new Exception("Error: Password cannot be null.");
var securePassword = new SecureString();
foreach(var c in password)
securePassword.AppendChar(c);
securePassword.MakeReadOnly();
return securePassword;
}
internal unsafe byte[] ToByteArray()
{
if(_bytes != null)
{
_bytes.Fill(0);
_bytes = null;
}
var maxLength = _encoding.GetMaxByteCount(_secureString.Length);
var bytes = IntPtr.Zero;
var str = IntPtr.Zero;
try
{
bytes = Marshal.AllocHGlobal(maxLength);
str = Marshal.SecureStringToBSTR(_secureString);
var chars = (char*) str.ToPointer();
var bptr = (byte*) bytes.ToPointer();
var len = _encoding.GetBytes(chars, _secureString.Length, bptr, maxLength);
_bytes = new byte[len];
for(var i = 0; i < len; ++i)
{
_bytes[i] = *bptr;
bptr++;
}
return _bytes;
}
finally
{
if(bytes != IntPtr.Zero)
Marshal.FreeHGlobal(bytes);
if(str != IntPtr.Zero)
Marshal.ZeroFreeBSTR(str);
}
}
private void Destroy()
{
if(_bytes != null)
{
_bytes.Fill(0);
_bytes = null;
}
}
}
public static class SecureStringEx
{
/// <summary>
/// Converts a standard string to a secure string
/// </summary>
public static SecureString ToSecureString(this string password)
{
if(password == null)
throw new Exception("Error: Password cannot be null.");
var securePassword = new SecureString();
foreach(var c in password)
securePassword.AppendChar(c);
securePassword.MakeReadOnly();
return securePassword;
}
}
public class SecureStringHelper : IDisposable { private readonly Encoding _encoding; private readonly SecureString _secureString; private byte[] _bytes; private bool _disposed; public SecureStringHelper(SecureString secureString) : this(secureString, Encoding.Default) { } public SecureStringHelper(SecureString secureString, Encoding encoding) { if(secureString == null) throw new Exception(nameof(secureString)); _encoding = encoding ?? Encoding.Default; _secureString = secureString; } public void Dispose() { if(!_disposed) { Destroy(); _disposed = true; } GC.SuppressFinalize(this); } public static string ToString(SecureString secureStr) { var Str = new NetworkCredential(string.Empty, secureStr).Password; return Str; } public static SecureString ToSecureString(string password) { if(password == null) throw new Exception("Error: Password cannot be null."); var securePassword = new SecureString(); foreach(var c in password) securePassword.AppendChar(c); securePassword.MakeReadOnly(); return securePassword; } internal unsafe byte[] ToByteArray() { if(_bytes != null) { _bytes.Fill(0); _bytes = null; } var maxLength = _encoding.GetMaxByteCount(_secureString.Length); var bytes = IntPtr.Zero; var str = IntPtr.Zero; try { bytes = Marshal.AllocHGlobal(maxLength); str = Marshal.SecureStringToBSTR(_secureString); var chars = (char*) str.ToPointer(); var bptr = (byte*) bytes.ToPointer(); var len = _encoding.GetBytes(chars, _secureString.Length, bptr, maxLength); _bytes = new byte[len]; for(var i = 0; i < len; ++i) { _bytes[i] = *bptr; bptr++; } return _bytes; } finally { if(bytes != IntPtr.Zero) Marshal.FreeHGlobal(bytes); if(str != IntPtr.Zero) Marshal.ZeroFreeBSTR(str); } } private void Destroy() { if(_bytes != null) { _bytes.Fill(0); _bytes = null; } } } public static class SecureStringEx { /// <summary> /// Converts a standard string to a secure string /// </summary> public static SecureString ToSecureString(this string password) { if(password == null) throw new Exception("Error: Password cannot be null."); var securePassword = new SecureString(); foreach(var c in password) securePassword.AppendChar(c); securePassword.MakeReadOnly(); return securePassword; } }