c# Aes加解密和SHA256加解密方法

1. Aes

    public static  class AesUtil
    {
        #region AES加密
        /// <summary>
        /// aes加码
        /// </summary>
        /// <param name="toEncrypt"></param>
        /// <returns></returns>
        /// 
        public static string Encrypt(string toEncrypt)
        {
            try
            {

                byte[] keyArray = UTF8Encoding.UTF8.GetBytes("testtesttesttest");
                byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);


                RijndaelManaged rDel = new RijndaelManaged();//using System.Security.Cryptography;     
                rDel.Key = keyArray;
                rDel.Mode = CipherMode.ECB;//using System.Security.Cryptography;     
                rDel.Padding = PaddingMode.PKCS7;//using System.Security.Cryptography;     
                ICryptoTransform cTransform = rDel.CreateEncryptor();//using System.Security.Cryptography;     
                byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

                StringBuilder builder = new StringBuilder(resultArray.Length * 3);
                foreach (byte data in resultArray)
                    builder.Append(Convert.ToString(data, 16).PadLeft(2, '0').PadRight(3, ' '));
                return builder.ToString().ToUpper().Replace(" ", "");

            }
            catch (Exception ex)
            {
                Log.Error($"AesEncrypt ex:{ex.Message}");
                return "";
            }
            //return Convert.ToBase64String(resultArray, 0, resultArray.Length);
        }


        #endregion AES加密

        #region AES解密
        /// <summary>
        /// aes解码
        /// </summary>
        /// <param name="toDecrypt"></param>
        /// <returns></returns>
        public static string Decrypt(string toDecrypt)
        {
            try
            {

                byte[] keyArray = UTF8Encoding.UTF8.GetBytes("testtesttesttest");

                toDecrypt = toDecrypt.Replace(" ", "");

                byte[] comBuffer = new byte[toDecrypt.Length / 2];

                for (int i = 0; i < toDecrypt.Length; i += 2)
                    comBuffer[i / 2] = (byte)Convert.ToByte(toDecrypt.Substring(i, 2), 16);


                RijndaelManaged rDel = new RijndaelManaged();
                rDel.Key = keyArray;
                rDel.Mode = CipherMode.ECB;
                rDel.Padding = PaddingMode.PKCS7;

                ICryptoTransform cTransform = rDel.CreateDecryptor();
                byte[] resultArray = cTransform.TransformFinalBlock(comBuffer, 0, comBuffer.Length);


                return UTF8Encoding.UTF8.GetString(resultArray);
            }
            catch (Exception ex)
            {
                Log.Error($"AesDecrypt ex:{ex.Message}");
                return "";
            }
        }
        #endregion AES解密

    }

2. SHA256

    public static class SHA256EncryptUtil
    {
        /// SHA256加密，并十六进制编码
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static string SHA256EncryptString(string data)
        {
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(data);
            byte[] hash = SHA256Managed.Create().ComputeHash(bytes);

            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < hash.Length; i++)
            {
                builder.Append(hash[i].ToString("x2"));
            }
            return builder.ToString();
        }


        /// <summary>
        /// HMACSHA256加密
        /// </summary>
        /// <param name="message"></param>
        /// <param name="secret"></param>
        /// <returns></returns>
        public static string HmacSHA256(string message, string secret)
        {
            secret = secret ?? "";
            var encoding = new System.Text.UTF8Encoding();
            byte[] keyByte = encoding.GetBytes(secret);
            byte[] messageBytes = encoding.GetBytes(message);
            using (var hmacsha256 = new HMACSHA256(keyByte))
            {
                byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);
                StringBuilder builder = new StringBuilder();
                for (int i = 0; i < hashmessage.Length; i++)
                {
                    builder.Append(hashmessage[i].ToString("x2"));
                }
                return builder.ToString();
            }
        }

        /// <summary>
        /// 二进制
        /// </summary>
        /// <param name="message"></param>
        /// <param name="secret"></param>
        /// <returns></returns>
        public static byte[] HmacSHA256Bytes(string message, string secret)
        {
            secret = secret ?? "";
            var encoding = new System.Text.UTF8Encoding();
            byte[] keyByte = encoding.GetBytes(secret);
            byte[] messageBytes = encoding.GetBytes(message);
            using (var hmacsha256 = new HMACSHA256(keyByte))
            {
                byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);
                //StringBuilder builder = new StringBuilder();
                //for (int i = 0; i < hashmessage.Length; i++)
                //{
                //    builder.Append(hashmessage[i].ToString("x2"));
                //}
                return hashmessage;
            }
        }
    }

测试密钥文章来源地址https://www.toymoban.com/news/detail-767760.html

公钥
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAp3nEMet00r0M72wQW5wpg1Gl06R2iH/p6L9HO5qPw8y2uu5ZXYyP9rcuzMzQ0Gr5NfdJMEf6FYKqe+UnMvURctTxCH+Nu0yKSjKJwWTthvyDZ3uKVZsK5ix56zsJNJt/zgFhsuioLXrSQuqea/G867VYqYp7Q2RzT0KBmmIVVG8Bh5NBEs8fhnHFpMH7x3WVWipUT+ulYCebVX+ncXeRPpJXNz/NpLp2ULoyGgKAzYaYoPNt4hf/hLekBmj5BkvYJZscRCxNybYwjM801OLzlUHKLj5X/8wvSXGChKTNXEphH5xB7idKeUhjeptsJnrrchiP/nRqyCyTTLHScHlG7QIDAQAB
-----END PUBLIC KEY-----

私钥
-----BEGIN PRIVATE KEY-----
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
-----END PRIVATE KEY-----

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