详解.NET中的加密算法总结(自定义加密Helper类续)_实用技巧_

 /// 
 /// Encrypts the specified hash algorithm. /// 1. Generates a cryptographic Hash Key for the provided text data. /// 
 /// The hash algorithm. /// The data to hash. ///  public static string Encrypt(HashAlgorithm hashAlgorithm, string dataToHash) { var tabStringHex = new string[16]; var UTF8 = new System.Text.UTF8Encoding(); byte[] data = UTF8.GetBytes(dataToHash); byte[] result = hashAlgorithm.ComputeHash(data); var hexResult = new StringBuilder(result.Length); for (int i = 0; i < result.Length; i++) { //// Convert to hexadecimal hexResult.Append(result[i].ToString("X2")); } return hexResult.ToString(); }

 /// 
 /// Determines whether [is hash match] [the specified hash algorithm]. /// 
 /// The hash algorithm. /// The hashed text. /// The unhashed text. ///  /// true if [is hash match] [the specified hash algorithm]; /// otherwise, false. ///  public static bool IsHashMatch(HashAlgorithm hashAlgorithm, string hashedText, string unhashedText) { string hashedTextToCompare = Encrypt( hashAlgorithm, unhashedText); return (String.Compare(hashedText, hashedTextToCompare, false) == 0); } 

 // The sample function. public void Encrypt() { // The size of the IV property must be the same as the BlockSize property. // Due to the RC2 block size is 64 bytes, so iv size also is 64 bytes. var iv = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 }; var pdb = new PasswordDeriveBytes("pwd", null); // Set the encrypted algorithm and export key algorithm. // Then get the key base on encrypt algorithm. byte[] key = pdb.CryptDeriveKey("RC2", "SHA1", 128, iv); Console.WriteLine(key.Length * 8); Console.WriteLine(new RC2CryptoServiceProvider().BlockSize); // Creates an RC2 object to encrypt with the derived key var rc2 = new RC2CryptoServiceProvider { Key = key, IV = new byte[] { 21, 22, 23, 24, 25, 26, 27, 28 } }; // now encrypt with it byte[] plaintext = Encoding.UTF8.GetBytes("NeedToEncryptData"); using (var ms = new MemoryStream()) { var cs = new CryptoStream( ms, rc2.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(plaintext, 0, plaintext.Length); cs.Close(); byte[] encrypted = ms.ToArray(); } } 

 /// 
 /// Uses the PBKDF1 to genernate key, /// then use it to encrypt plain text. /// 
 public void PBKDF1() { byte[] salt = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 }; // Creates an RC2 object to encrypt with the derived key var pdb = new PasswordDeriveBytes("pwd", salt) {IterationCount = 23, HashName = "SHA1"}; // Gets the key and iv. byte[] key = pdb.GetBytes(16); byte[] iv = pdb.GetBytes(8); var rc2 = new RC2CryptoServiceProvider { Key = key, IV = iv }; byte[] plaintext = Encoding.UTF8.GetBytes("NeedToEncryptData"); using (var ms = new MemoryStream()) { // Encrypts data. var cs = new CryptoStream( ms, rc2.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(plaintext, 0, plaintext.Length); cs.Close(); byte[] encrypted = ms.ToArray(); } } 

 /// 
 /// Uses the PBKDF2 to genernate key, /// then use it to encrypt plain text. /// 
 public void PBKDF2() { byte[] salt = new byte[] { 23, 21, 32, 33, 46, 59, 60, 74 }; var rfc = new Rfc2898DeriveBytes("pwd", salt, 23); // generate key and iv. byte[] key = rfc.GetBytes(16); byte[] iv = rfc.GetBytes(8); // Creates an RC2 object to encrypt with the derived key var rc2 = new RC2CryptoServiceProvider { Key = key, IV = iv }; // Encrypts the data. byte[] plaintext = Encoding.UTF8.GetBytes("NeedToEncryptData"); using (var ms = new MemoryStream()) { var cs = new CryptoStream( ms, rc2.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(plaintext, 0, plaintext.Length); cs.Close(); byte[] encrypted = ms.ToArray(); } } 

 /// 
 /// Encrypts with specified symmetric algorithm. /// Can be Aes, DES, RC2, Rijndael and TripleDES. /// 
 /// The symmertric algorithm (Aes, DES, RC2, Rijndael and TripleDES). /// The plain text need to be encrypted. /// The secret key to encrypt plain text. /// The iv should be 16 bytes. /// Salt to encrypt with. /// The number of iterations for plain text. /// Size of the key. /// The cipher mode. /// The padding mode. ///  public static byte[] Encrypt(SymmetricAlgorithm algorithm, byte[] plainText, string key, string iv, string salt, int pwdIterations, int keySize, CipherMode cipherMode, PaddingMode paddingMode) { if (null == plainText) throw new ArgumentNullException("plainText"); if (null == algorithm) throw new ArgumentNullException("algorithm"); if (String.IsNullOrEmpty(key)) throw new ArgumentNullException("key"); if (String.IsNullOrEmpty(iv)) throw new Argumen
                
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