Exemplo n.º 1
0
        //http://www.obviex.com/samples/dpapi.aspx
        //http://msdn.microsoft.com/security/securecode/dotnet/default.aspx?pull=/library/en-us/dnnetsec/html/SecNetHT07.asp
        public static byte [] UnprotectData(byte [] cipherIn, ProtectParam flags, out string desc)
        {
            desc = null;
            StringBuilder  sb     = new StringBuilder();        //TODO not returning properly
            CRYPTOAPI_BLOB blobIn = new CRYPTOAPI_BLOB();

            byte [] plainOut;
            try
            {
                blobIn.cbData = cipherIn.Length;
                //blobIn.pbData = cipherIn; //byte[]
                //blobIn.pbData = Mem.AllocHGlobal(blobIn.cbData);
                blobIn.pbData = Mem.CryptMemAlloc(blobIn.cbData);
                Marshal.Copy(cipherIn, 0, blobIn.pbData, blobIn.cbData);

                IntPtr         optEntropy = IntPtr.Zero;     //CRYPTOAPI_BLOB*
                IntPtr         reserved   = IntPtr.Zero;     //PVOID
                IntPtr         prompt     = IntPtr.Zero;     //CRYPTPROTECT_PROMPTSTRUCT*
                CRYPTOAPI_BLOB dataOut    = new CRYPTOAPI_BLOB();

                //BUG
                //bool retVal = Crypto.CryptUnprotectData(ref blobIn, sb, optEntropy, reserved, prompt, (uint) flags, ref dataOut);
                //desc = sb.ToString();

                //Assuming a max size of 99 characters in the description null terminating character
                IntPtr ppszDescription = Mem.CryptMemAlloc(100);
                bool   retVal          = Crypto.CryptUnprotectData(ref blobIn, ref ppszDescription, optEntropy, reserved, prompt, (uint)flags, ref dataOut);
                desc = Marshal.PtrToStringUni(ppszDescription);
                Mem.CryptMemFree(ppszDescription);
                ErrCode ec = Error.HandleRetVal(retVal);

                plainOut = new byte[dataOut.cbData];
                Marshal.Copy(dataOut.pbData, plainOut, 0, dataOut.cbData);
                //Mem.FreeHGlobal(dataOut.pbData);
                Mem.CryptMemFree(dataOut.pbData);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (blobIn.pbData != IntPtr.Zero)
                {
                    //Mem.FreeHGlobal(blobIn.pbData);
                    Mem.CryptMemFree(blobIn.pbData);
                }
            }
            return(plainOut);
        }
Exemplo n.º 2
0
        //http://www.obviex.com/samples/dpapi.aspx
        //http://msdn.microsoft.com/security/securecode/dotnet/default.aspx?pull=/library/en-us/dnnetsec/html/SecNetHT07.asp
        public static byte [] ProtectData(byte [] plainIn, ProtectParam flags, string desc)
        {
            StringBuilder  sb     = new StringBuilder(desc);
            CRYPTOAPI_BLOB blobIn = new CRYPTOAPI_BLOB();

            byte [] cipherOut;
            try
            {
                blobIn.cbData = plainIn.Length;
                //blobIn.pbData = plainIn; //byte[]
                //blobIn.pbData = Mem.AllocHGlobal(blobIn.cbData);
                blobIn.pbData = Mem.CryptMemAlloc(blobIn.cbData);
                Marshal.Copy(plainIn, 0, blobIn.pbData, blobIn.cbData);

                IntPtr         optEntropy = IntPtr.Zero;     //CRYPTOAPI_BLOB*
                IntPtr         reserved   = IntPtr.Zero;     //PVOID
                IntPtr         prompt     = IntPtr.Zero;     //CRYPTPROTECT_PROMPTSTRUCT*
                CRYPTOAPI_BLOB dataOut    = new CRYPTOAPI_BLOB();

                bool    retVal = Crypto.CryptProtectData(ref blobIn, sb, optEntropy, reserved, prompt, (uint)flags, ref dataOut);
                ErrCode ec     = Error.HandleRetVal(retVal);

                cipherOut = new byte[dataOut.cbData];
                Marshal.Copy(dataOut.pbData, cipherOut, 0, dataOut.cbData);
                //Mem.FreeHGlobal(dataOut.pbData);
                Mem.CryptMemFree(dataOut.pbData);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (blobIn.pbData != IntPtr.Zero)
                {
                    //Mem.FreeHGlobal(blobIn.pbData);
                    Mem.CryptMemFree(blobIn.pbData);
                }
            }
            return(cipherOut);
        }
Exemplo n.º 3
0
		private static extern bool CryptUnprotectDataXp(ref CRYPTOAPI_BLOB pDataIn, ref IntPtr ppszDataDescr, IntPtr pOptionalEntropy, IntPtr pvReserved, IntPtr pPromptStruct, uint dwFlags, ref CRYPTOAPI_BLOB pDataOut);
Exemplo n.º 4
0
		///<summary>
		///This function decrypts and checks the integrity of the data in a DATA_BLOB 
		///structure. Usually, only a user with the same logon credentials as the encrypter 
		///can decrypt the data. In addition, the encryption and decryption must be done on 
		///the same computer. 
		///Note   An untrusted application can call the CryptUnprotectData function. The call 
		///will fail only if CRYPTPROTECT_SYSTEM is specified for the dwFlags parameter.
		///</summary>
		/// <remarks>
		/// works on smartPhone
		/// </remarks>
		public static bool CryptUnprotectData(ref CRYPTOAPI_BLOB pDataIn, ref IntPtr ppszDataDescr, IntPtr pOptionalEntropy, IntPtr pvReserved, IntPtr pPromptStruct, uint dwFlags, ref CRYPTOAPI_BLOB pDataOut)
		{
			if(System.Environment.OSVersion.Platform == PlatformID.WinCE)
				return CryptUnprotectDataCe(ref pDataIn, ref ppszDataDescr, pOptionalEntropy, pvReserved, pPromptStruct, dwFlags, ref pDataOut);
			else
				return CryptUnprotectDataXp(ref pDataIn, ref ppszDataDescr, pOptionalEntropy, pvReserved, pPromptStruct, dwFlags, ref pDataOut);
		}
Exemplo n.º 5
0
		private static extern bool CryptProtectDataCe(ref CRYPTOAPI_BLOB pDataIn, StringBuilder szDataDescr, IntPtr pOptionalEntropy, IntPtr pvReserved, IntPtr pPromptStruct, uint dwFlags, ref CRYPTOAPI_BLOB pDataOut);
Exemplo n.º 6
0
		//http://www.obviex.com/samples/dpapi.aspx
		//http://msdn.microsoft.com/security/securecode/dotnet/default.aspx?pull=/library/en-us/dnnetsec/html/SecNetHT07.asp
		public static byte [] UnprotectData(byte [] cipherIn, ProtectParam flags, out string desc)
		{
			desc =null; 
			StringBuilder sb = new StringBuilder(); //TODO not returning properly
			CRYPTOAPI_BLOB blobIn = new CRYPTOAPI_BLOB();
			byte [] plainOut;
			try
			{
				blobIn.cbData = cipherIn.Length;
				//blobIn.pbData = cipherIn; //byte[]
				//blobIn.pbData = Mem.AllocHGlobal(blobIn.cbData);
				blobIn.pbData = Mem.CryptMemAlloc(blobIn.cbData);
				Marshal.Copy(cipherIn, 0, blobIn.pbData, blobIn.cbData);

				IntPtr optEntropy = IntPtr.Zero; //CRYPTOAPI_BLOB*
				IntPtr reserved = IntPtr.Zero; //PVOID
				IntPtr prompt = IntPtr.Zero; //CRYPTPROTECT_PROMPTSTRUCT*
				CRYPTOAPI_BLOB dataOut = new CRYPTOAPI_BLOB();
				
				//BUG
				//bool retVal = Crypto.CryptUnprotectData(ref blobIn, sb, optEntropy, reserved, prompt, (uint) flags, ref dataOut);
				//desc = sb.ToString();
				
				//Assuming a max size of 99 characters in the description null terminating character
				IntPtr ppszDescription = Mem.CryptMemAlloc(100);
				bool retVal = Crypto.CryptUnprotectData(ref blobIn, ref ppszDescription, optEntropy, reserved, prompt, (uint) flags, ref dataOut);
				desc = Marshal.PtrToStringUni(ppszDescription);
				Mem.CryptMemFree(ppszDescription);
				ErrCode ec = Error.HandleRetVal(retVal);
				
				plainOut = new byte[dataOut.cbData];
				Marshal.Copy(dataOut.pbData, plainOut, 0, dataOut.cbData);
				//Mem.FreeHGlobal(dataOut.pbData);
				Mem.CryptMemFree(dataOut.pbData);
			}
			catch(Exception ex)
			{
				throw ex;
			}
			finally
			{
				if (blobIn.pbData != IntPtr.Zero)
				{
					//Mem.FreeHGlobal(blobIn.pbData);
					Mem.CryptMemFree(blobIn.pbData);
				}
			}
			return plainOut;
		}
Exemplo n.º 7
0
		//http://www.obviex.com/samples/dpapi.aspx
		//http://msdn.microsoft.com/security/securecode/dotnet/default.aspx?pull=/library/en-us/dnnetsec/html/SecNetHT07.asp
		public static byte [] ProtectData(byte [] plainIn, ProtectParam flags, string desc)
		{
			StringBuilder sb = new StringBuilder(desc);
			CRYPTOAPI_BLOB blobIn = new CRYPTOAPI_BLOB();
			byte [] cipherOut;
			try
			{
				blobIn.cbData = plainIn.Length;
				//blobIn.pbData = plainIn; //byte[]
				//blobIn.pbData = Mem.AllocHGlobal(blobIn.cbData);
				blobIn.pbData = Mem.CryptMemAlloc(blobIn.cbData);
				Marshal.Copy(plainIn, 0, blobIn.pbData, blobIn.cbData);

				IntPtr optEntropy = IntPtr.Zero; //CRYPTOAPI_BLOB*
				IntPtr reserved = IntPtr.Zero; //PVOID
				IntPtr prompt = IntPtr.Zero; //CRYPTPROTECT_PROMPTSTRUCT*
				CRYPTOAPI_BLOB dataOut = new CRYPTOAPI_BLOB();
				
				bool retVal = Crypto.CryptProtectData(ref blobIn, sb, optEntropy, reserved, prompt, (uint) flags, ref dataOut);
				ErrCode ec = Error.HandleRetVal(retVal);
				
				cipherOut = new byte[dataOut.cbData];
				Marshal.Copy(dataOut.pbData, cipherOut, 0, dataOut.cbData);
				//Mem.FreeHGlobal(dataOut.pbData);
				Mem.CryptMemFree(dataOut.pbData);
			}
			catch(Exception ex)
			{
				throw ex;
			}
			finally
			{
				if (blobIn.pbData != IntPtr.Zero)
				{
					//Mem.FreeHGlobal(blobIn.pbData);
					Mem.CryptMemFree(blobIn.pbData);
				}
			}
			return cipherOut;
		}