예제 #1
0
        /// <summary>
        /// Verifies that a file has a valid digital signature.
        /// </summary>
        /// <param name="owner">The parent/owner window for any UI that may be shown.</param>
        /// <param name="fileName">The path to the file to be validate.</param>
        /// <param name="showNegativeUI">Whether or not to show a UI in the case that the signature can not be found or validated.</param>
        /// <param name="showPositiveUI">Whether or not to show a UI in the case that the signature is successfully found and validated.</param>
        /// <returns>true if the file has a digital signature that validates up to a trusted root, or false otherwise</returns>
        public static bool VerifySignedFile(IWin32Window owner, string fileName, bool showNegativeUI, bool showPositiveUI)
        {
            unsafe
            {
                fixed(char *szFileName = fileName)
                {
                    Guid pgActionID = NativeConstants.WINTRUST_ACTION_GENERIC_VERIFY_V2;

                    var fileInfo = new NativeStructs.WINTRUST_FILE_INFO();

                    fileInfo.cbStruct      = (uint)sizeof(NativeStructs.WINTRUST_FILE_INFO);
                    fileInfo.pcwszFilePath = szFileName;

                    var wintrustData = new NativeStructs.WINTRUST_DATA();

                    wintrustData.cbStruct = (uint)sizeof(NativeStructs.WINTRUST_DATA);

                    if (!showNegativeUI && !showPositiveUI)
                    {
                        wintrustData.dwUIChoice = NativeConstants.WTD_UI_NONE;
                    }
                    else if (!showNegativeUI && showPositiveUI)
                    {
                        wintrustData.dwUIChoice = NativeConstants.WTD_UI_NOBAD;
                    }
                    else if (showNegativeUI && !showPositiveUI)
                    {
                        wintrustData.dwUIChoice = NativeConstants.WTD_UI_NOGOOD;
                    }
                    else                     // if (showNegativeUI && showPositiveUI)
                    {
                        wintrustData.dwUIChoice = NativeConstants.WTD_UI_ALL;
                    }

                    wintrustData.fdwRevocationChecks = NativeConstants.WTD_REVOKE_WHOLECHAIN;
                    wintrustData.dwUnionChoice       = NativeConstants.WTD_CHOICE_FILE;
                    wintrustData.pInfo = &fileInfo;

                    IntPtr handle;

                    if (owner == null)
                    {
                        handle = IntPtr.Zero;
                    }
                    else
                    {
                        handle = owner.Handle;
                    }

                    int result = NativeMethods.WinVerifyTrust(handle, ref pgActionID, ref wintrustData);

                    GC.KeepAlive(owner);
                    return(result >= 0);
                }
            }
        }
예제 #2
0
		/// <summary>
		/// Verifies that a file has a valid digital signature.
		/// </summary>
		/// <param name="owner">The parent/owner window for any UI that may be shown.</param>
		/// <param name="fileName">The path to the file to be validate.</param>
		/// <param name="showNegativeUI">Whether or not to show a UI in the case that the signature can not be found or validated.</param>
		/// <param name="showPositiveUI">Whether or not to show a UI in the case that the signature is successfully found and validated.</param>
		/// <returns>true if the file has a digital signature that validates up to a trusted root, or false otherwise</returns>
		public static bool VerifySignedFile(IWin32Window owner, string fileName, bool showNegativeUI, bool showPositiveUI) {
			unsafe {
				fixed (char* szFileName = fileName) {
					Guid pgActionID = NativeConstants.WINTRUST_ACTION_GENERIC_VERIFY_V2;

					var fileInfo = new NativeStructs.WINTRUST_FILE_INFO();
					fileInfo.cbStruct = (uint) sizeof (NativeStructs.WINTRUST_FILE_INFO);
					fileInfo.pcwszFilePath = szFileName;

					var wintrustData = new NativeStructs.WINTRUST_DATA();
					wintrustData.cbStruct = (uint) sizeof (NativeStructs.WINTRUST_DATA);

					if (!showNegativeUI && !showPositiveUI) {
						wintrustData.dwUIChoice = NativeConstants.WTD_UI_NONE;
					}
					else if (!showNegativeUI && showPositiveUI) {
						wintrustData.dwUIChoice = NativeConstants.WTD_UI_NOBAD;
					}
					else if (showNegativeUI && !showPositiveUI) {
						wintrustData.dwUIChoice = NativeConstants.WTD_UI_NOGOOD;
					}
					else // if (showNegativeUI && showPositiveUI)
					{
						wintrustData.dwUIChoice = NativeConstants.WTD_UI_ALL;
					}

					wintrustData.fdwRevocationChecks = NativeConstants.WTD_REVOKE_WHOLECHAIN;
					wintrustData.dwUnionChoice = NativeConstants.WTD_CHOICE_FILE;
					wintrustData.pInfo = &fileInfo;

					IntPtr handle;

					if (owner == null) {
						handle = IntPtr.Zero;
					}
					else {
						handle = owner.Handle;
					}

					int result = NativeMethods.WinVerifyTrust(handle, ref pgActionID, ref wintrustData);

					GC.KeepAlive(owner);
					return result >= 0;
				}
			}
		}