just to extend the answer to VeraCrypt, modified from Gerard Walace's post:
TrueCrypt and VeraCrypt usage in MSFT_Helpers.cs @ https://github.com/BananaAcid/Selfcontained-C-Sharp-WPF-compatible-utility-classes
Simple usage example here: http://github.com/BananaAcid/VeraCrypt-Cmd
public static class VcGetMounts
{
public static async Task<Dictionary<char, string>> getMounted()
{
return await Task.Run<Dictionary<char, string>>(() =>
{
var ret = new Dictionary<char, string>();
uint size = (uint)Marshal.SizeOf(typeof(MOUNT_LIST_STRUCT));
IntPtr buffer = Marshal.AllocHGlobal((int)size);
uint bytesReturned;
IntPtr _hdev = CreateFile("\\\\.\\VeraCrypt", FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, 0, IntPtr.Zero);
bool bResult = DeviceIoControl(_hdev, TC_IOCTL_GET_MOUNTED_VOLUMES, buffer, size, buffer, size, out bytesReturned, IntPtr.Zero);
// IMPORTANT! Otherwise, the struct fills up with random bytes from memory, if no VeraCrypt is available
if (!bResult) return ret;
MOUNT_LIST_STRUCT mount = new MOUNT_LIST_STRUCT();
Marshal.PtrToStructure(buffer, mount);
Marshal.FreeHGlobal(buffer);
for (int i = 0; i < 26; i++)
if (mount.wszVolume[i].ToString().Length > 0)
ret.Add((char)('A' + i), mount.wszVolume[i].ToString());
return ret;
});
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
class MOUNT_LIST_STRUCT
{
public readonly UInt32 ulMountedDrives; /* Bitfield of all mounted drive letters */
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
public readonly MOUNT_LIST_STRUCT_VOLUME_NAME[] wszVolume; /* Volume names of mounted volumes */
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
public readonly MOUNT_LIST_STRUCT_VOLUME_LABEL[] wszLabel; /* Volume labels of mounted volumes */
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
public readonly MOUNT_LIST_STRUCT_VOLUME_ID[] volumeID; /* Volume labels of mounted volumes */
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
public readonly UInt64[] diskLength;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
public readonly int[] ea;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
public readonly int[] volumeType; /* Volume type (e.g. PROP_VOL_TYPE_OUTER, PROP_VOL_TYPE_OUTER_VOL_WRITE_PREVENTED, etc.) */
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 26)]
public readonly bool[] truecryptMode;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
struct MOUNT_LIST_STRUCT_VOLUME_NAME
{
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.I2, SizeConst = 260)]
public readonly char[] wszVolume; /* Volume names of mounted volumes */
public override string ToString()
{
return (new String(wszVolume)).TrimEnd('\0');
}
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
struct MOUNT_LIST_STRUCT_VOLUME_ID
{
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.I2, SizeConst = 32)]
public readonly char[] volumeID; /* Volume ids of mounted volumes */
public override string ToString()
{
return (new String(volumeID)).TrimEnd('\0');
}
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
struct MOUNT_LIST_STRUCT_VOLUME_LABEL
{
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.I2, SizeConst = 33)]
public readonly char[] wszLabel; /* Volume labels of mounted volumes */
public override string ToString()
{
return (new String(wszLabel)).TrimEnd('\0');
}
}
public static int CTL_CODE(int DeviceType, int Function, int Method, int Access)
{
return (((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2)
| (Method));
}
private static readonly uint TC_IOCTL_GET_MOUNTED_VOLUMES = (uint)CTL_CODE(0x00000022, 0x800 + (6), 0, 0);
[DllImport("kernel32.dll", ExactSpelling = true, SetLastError = true, CharSet = CharSet.Auto)]
static extern bool DeviceIoControl(IntPtr hDevice, uint dwIoControlCode,
IntPtr lpInBuffer, uint nInBufferSize,
IntPtr lpOutBuffer, uint nOutBufferSize,
out uint lpBytesReturned, IntPtr lpOverlapped);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern IntPtr CreateFile(
[MarshalAs(UnmanagedType.LPTStr)] string filename,
[MarshalAs(UnmanagedType.U4)] FileAccess access,
[MarshalAs(UnmanagedType.U4)] FileShare share,
IntPtr securityAttributes, // optional SECURITY_ATTRIBUTES struct or IntPtr.Zero
[MarshalAs(UnmanagedType.U4)] FileMode creationDisposition,
[MarshalAs(UnmanagedType.U4)] FileAttributes flagsAndAttributes,
IntPtr templateFile);
}
