C# 3Des两种加密方式 (对应java中的desede/CBC/PKCS5Padding加密)

浅浅的花香味﹌ 2023-01-03 14:01 139阅读 0赞

1、3Des两种加密方式

//3DES的cbc加密[24位密钥对应192位加密]
            public static string TripleDesEncryptorCBC(string text, string key, string iv)
            {
                var tripleDESCipher = new TripleDESCryptoServiceProvider();
                tripleDESCipher.Mode = CipherMode.CBC;
                tripleDESCipher.Padding = PaddingMode.PKCS7;
                byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key);
                byte[] keyBytes = new byte[24];
                int len = pwdBytes.Length;
                if (len > keyBytes.Length)
                    len = keyBytes.Length;
                System.Array.Copy(pwdBytes, keyBytes, len);
                tripleDESCipher.Key = keyBytes;
                tripleDESCipher.IV = Encoding.ASCII.GetBytes(iv);
     
                ICryptoTransform transform = tripleDESCipher.CreateEncryptor();
                byte[] plainText = Encoding.UTF8.GetBytes(text);
                byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length);
                return Convert.ToBase64String(cipherBytes);
            }
     
            //3DES的cbc解密
            public static string TripleDesDecryptorCBC(string text, string key, string iv)
            {
                var tripleDESCipher = new TripleDESCryptoServiceProvider();
                tripleDESCipher.Mode = CipherMode.CBC;
                tripleDESCipher.Padding = PaddingMode.PKCS7;
     
                byte[] encryptedData = Convert.FromBase64String(text);
                byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key);
                byte[] keyBytes = new byte[24];
                byte[] ivBytes = Encoding.ASCII.GetBytes(iv);
                int len = pwdBytes.Length;
                if (len > keyBytes.Length)
                    len = keyBytes.Length;
                System.Array.Copy(pwdBytes, keyBytes, len);
                tripleDESCipher.Key = keyBytes;
                tripleDESCipher.IV = ivBytes;
                ICryptoTransform transform = tripleDESCipher.CreateDecryptor();
                byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
                return Encoding.UTF8.GetString(plainText);
            }
     
     
            //加密
            public string DESEncrypt(string paymentCode, string key, string iv)
            {
                SymmetricAlgorithm symmetric;
                ICryptoTransform iCrypto;
                MemoryStream memory;
                CryptoStream crypto;
                byte[] byt;
                symmetric = new TripleDESCryptoServiceProvider();
                symmetric.Key = Encoding.UTF8.GetBytes(key);
                symmetric.IV = Encoding.UTF8.GetBytes(iv);
                iCrypto = symmetric.CreateEncryptor();
                byt = Encoding.UTF8.GetBytes(paymentCode);
                memory = new MemoryStream();
                crypto = new CryptoStream(memory, iCrypto, CryptoStreamMode.Write);
                crypto.Write(byt, 0, byt.Length);
                crypto.FlushFinalBlock();
                crypto.Close();
                return Convert.ToBase64String(memory.ToArray());
            }
     
            //解密
            public static string DESDecrypst(string data, string key, string iv)
            {
                SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvider();
     
                mCSP.Key = Encoding.UTF8.GetBytes(key);
                mCSP.IV = Encoding.UTF8.GetBytes(iv);
                ICryptoTransform iCrypto;
                MemoryStream memory;
                CryptoStream crypto;
                byte[] byt;
                iCrypto = mCSP.CreateDecryptor(mCSP.Key, mCSP.IV);
     
                byt = Convert.FromBase64String(data);
                memory = new MemoryStream();
                crypto = new CryptoStream(memory, iCrypto, CryptoStreamMode.Write);
                crypto.Write(byt, 0, byt.Length);
                crypto.FlushFinalBlock();
                crypto.Close();
                return Encoding.UTF8.GetString(memory.ToArray());
            }