コード例 #1
0
		/// <summary>
		/// Initializes a new instance of the <see cref="RC4CryptoServiceProvider"/> class.
		/// </summary>
		public RC4CryptoServiceProvider() {
			// acquire an RC4 context
			m_Provider = CAPIProvider.Handle;
/*			if (SspiProvider.CryptAcquireContext(ref m_Provider, IntPtr.Zero, null, SecurityConstants.PROV_RSA_FULL, 0) == 0) {
				if (Marshal.GetLastWin32Error() == SecurityConstants.NTE_BAD_KEYSET)
					SspiProvider.CryptAcquireContext(ref m_Provider, IntPtr.Zero, null, SecurityConstants.PROV_RSA_FULL, SecurityConstants.CRYPT_NEWKEYSET);
			}*/
			if (m_Provider != 0) {
				int dwFlags = SecurityConstants.CRYPT_FIRST;
				bool found = false;
				IntPtr provEnum = Marshal.AllocHGlobal(100);
				int dwSize;
				do {
					dwSize = 100;
					if (SspiProvider.CryptGetProvParam(m_Provider, SecurityConstants.PP_ENUMALGS_EX, provEnum, ref dwSize, dwFlags) == 0)
						break;
					dwFlags = 0;
					PROV_ENUMALGS_EX eax = (PROV_ENUMALGS_EX)Marshal.PtrToStructure(provEnum, typeof(PROV_ENUMALGS_EX));
					if (eax.aiAlgid == SecurityConstants.CALG_RC4) {
						found = true;
						m_MinLen = eax.dwMinLen;
						m_MaxLen = eax.dwMaxLen;
					}
				} while (!found);
				Marshal.FreeHGlobal(provEnum);
/*				if (!found) {
					SspiProvider.CryptReleaseContext(m_Provider, 0);
					m_Provider = 0;
				}*/
			}
			m_Managed = new ARCFourManaged();
		}
コード例 #2
0
 static void Main(string[] args)
 {
     Console.WriteLine("This example shows how to use the symmetric encryption classes from the Security Library.\r\n");
     SymmetricAlgorithm algorithm;
     ICryptoTransform encryptor, decryptor;
     Console.WriteLine("Select the symmetric algorithm you want to use:");
     Console.WriteLine("  [1] ARCFour [managed RC4]");
     Console.WriteLine("  [2] RC4 [unmanaged]");
     Console.WriteLine("  [3] Rijndael");
     Console.Write("Your choice: ");
     string input = Console.ReadLine().Trim();
     // initialize the selected symmetric algorithm
     switch(input) {
         case "1":
             algorithm = new ARCFourManaged();
             break;
         case "2":
             algorithm = new RC4CryptoServiceProvider();
             break;
         case "3":
             algorithm = new RijndaelCryptoServiceProvider();
             break;
         default:
             Console.WriteLine("Invalid input.");
             return;
     }
     Console.WriteLine("Enter some text that will be encrypted:");
     input = Console.ReadLine();
     byte[] plaintext = Encoding.ASCII.GetBytes(input);
     // generate an IV that consists of bytes with the value zero
     // in real life applications, the IV should not be set to
     // an array of bytes with the value zero!
     algorithm.IV = new byte[algorithm.BlockSize / 8];
     // generate a new key
     algorithm.GenerateKey();
     // create the encryption and decryption objects
     encryptor = algorithm.CreateEncryptor();
     decryptor = algorithm.CreateDecryptor();
     // encrypt the bytes
     byte[] encrypted = encryptor.TransformFinalBlock(plaintext, 0, plaintext.Length);
     // decrypt the encrypted bytes
     byte[] decrypted = decryptor.TransformFinalBlock(encrypted, 0, encrypted.Length);
     // write the byte arrays to the console
     Console.WriteLine("\r\nResults:");
     Console.WriteLine("  Input data: " + Encoding.ASCII.GetString(plaintext));
     Console.WriteLine("  Key: " + BytesToHex(algorithm.Key));
     Console.WriteLine("  Encrypted data: " + BytesToHex(encrypted));
     Console.WriteLine("  Decrypted data: " + Encoding.ASCII.GetString(decrypted));
     Console.WriteLine("\r\nPress ENTER to continue...");
     Console.ReadLine();
     // dispose of the resources
     algorithm.Clear();
     encryptor.Dispose();
     decryptor.Dispose();
 }
コード例 #3
0
        /// <summary>
        /// Initializes a new instance of the <see cref="RC4CryptoServiceProvider"/> class.
        /// </summary>
        public RC4CryptoServiceProvider()
        {
            // acquire an RC4 context
            m_Provider = CAPIProvider.Handle;

/*			if (SspiProvider.CryptAcquireContext(ref m_Provider, IntPtr.Zero, null, SecurityConstants.PROV_RSA_FULL, 0) == 0) {
 *                              if (Marshal.GetLastWin32Error() == SecurityConstants.NTE_BAD_KEYSET)
 *                                      SspiProvider.CryptAcquireContext(ref m_Provider, IntPtr.Zero, null, SecurityConstants.PROV_RSA_FULL, SecurityConstants.CRYPT_NEWKEYSET);
 *                      }*/
            if (m_Provider != 0)
            {
                int    dwFlags  = SecurityConstants.CRYPT_FIRST;
                bool   found    = false;
                IntPtr provEnum = Marshal.AllocHGlobal(100);
                int    dwSize;
                do
                {
                    dwSize = 100;
                    if (SspiProvider.CryptGetProvParam(m_Provider, SecurityConstants.PP_ENUMALGS_EX, provEnum, ref dwSize, dwFlags) == 0)
                    {
                        break;
                    }
                    dwFlags = 0;
                    PROV_ENUMALGS_EX eax = (PROV_ENUMALGS_EX)Marshal.PtrToStructure(provEnum, typeof(PROV_ENUMALGS_EX));
                    if (eax.aiAlgid == SecurityConstants.CALG_RC4)
                    {
                        found    = true;
                        m_MinLen = eax.dwMinLen;
                        m_MaxLen = eax.dwMaxLen;
                    }
                } while (!found);
                Marshal.FreeHGlobal(provEnum);

/*				if (!found) {
 *                                      SspiProvider.CryptReleaseContext(m_Provider, 0);
 *                                      m_Provider = 0;
 *                              }*/
            }
            m_Managed = new ARCFourManaged();
        }
コード例 #4
0
 /// <summary>
 /// Releases all managed and unmanaged resources used by this class.
 /// </summary>
 private void _Dispose()
 {
     if (!m_Disposed) {
         m_Disposed = true;
         if (m_Managed != null) {
             m_Managed.Clear();
             m_Managed = null;
         }
     /*				if (m_Provider != 0) {
             SspiProvider.CryptReleaseContext(m_Provider, 0);
             m_Provider = 0;
         }*/
         try {
             GC.SuppressFinalize(this);
         } catch {}
     }
 }
コード例 #5
0
 /// <summary>
 /// Releases all managed and unmanaged resources used by this class.
 /// </summary>
 protected override void Dispose(bool disposing)
 {
     base.Dispose(disposing);
     if (disposing && !m_Disposed) {
         m_Disposed = true;
         if (m_Managed != null) {
             m_Managed.Clear();
             m_Managed = null;
         }
         /*				if (m_Provider != 0) {
                             SspiProvider.CryptReleaseContext(m_Provider, 0);
                             m_Provider = 0;
                         }*/
         try {
             GC.SuppressFinalize(this);
         } catch { }
     }
 }