C#加密算法总结

C#加密算法总结

MD5加密

        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="strPwd">原字符串</param>
        /// <returns>加密后字符串</returns>
        public static string GetMD5(string strPwd)
        {
            //MD5 对象创建的两种方式
            //MD5 md5 = MD5.Create();
            MD5 md5 = new MD5CryptoServiceProvider();
            //将输入的密码转换成字节数组
            byte[] bPwd = Encoding.UTF8.GetBytes(strPwd);    
            //计算指定字节数组的哈希值
            byte[] bMD5 = md5.ComputeHash(bPwd);
            //释放加密服务提供类的所有资源
            md5.Clear();   
            StringBuilder sbMD5Pwd = new StringBuilder();
            for (int i = 0; i < bMD5.Length; i++)
            {
                //将每个字节数据转换为2位的16进制的字符
                sbMD5Pwd.Append(bMD5[i].ToString("x2"));
            }
            return sbMD5Pwd.ToString();
        }

SHA1加密

        /// <summary>
        /// 使用 SHA1 加密算法来加密
        /// </summary>
        /// <param name="sourceString">原字符串</param>
        /// <returns>加密后字符串</returns>
        public static string SHA1_Encrypt(string sourceString)
        {
            byte[] StrRes = Encoding.UTF8.GetBytes(sourceString);
            HashAlgorithm iSHA = new SHA1CryptoServiceProvider();
            StrRes = iSHA.ComputeHash(StrRes);
            StringBuilder EnText = new StringBuilder();
            foreach (byte iByte in StrRes)
            {
                EnText.AppendFormat("{0:x2}", iByte);
            }
            return EnText.ToString();
        }

SHA256加密

        /// <summary>
        /// SHA256 加密
        /// </summary>
        /// <param name="sourceString">原字符串</param>
        /// <returns>加密后字符串</returns>
        public static string SHA256_Encrypt(string sourceString)
        {
            byte[] data = Encoding.UTF8.GetBytes(sourceString);
            SHA256 shaM = SHA256.Create();
            byte[] result = shaM.ComputeHash(data);
            StringBuilder EnText = new StringBuilder();
            foreach (byte iByte in result)
            {
                EnText.AppendFormat("{0:x2}", iByte);
            }
            return EnText.ToString();
        }

SHA384加密

        /// <summary>
        /// SHA384 加密
        /// </summary>
        /// <param name="sourceString">原字符串</param>
        /// <returns>加密后字符串</returns>
        public static string SHA384_Encrypt(string sourceString)
        {
            byte[] data = Encoding.UTF8.GetBytes(sourceString);
            SHA384 shaM = SHA384.Create();
            byte[] result = shaM.ComputeHash(data);
            StringBuilder EnText = new StringBuilder();
            foreach (byte iByte in result)
            {
                EnText.AppendFormat("{0:x2}", iByte);
            }
            return EnText.ToString();
        }

SHA512加密

 

        /// <summary>
        /// SHA512_加密
        /// </summary>
        /// <param name="sourceString">原字符串</param>
        /// <returns>加密后字符串</returns>
        public static string SHA512_Encrypt(string sourceString)
        {
            byte[] data = Encoding.UTF8.GetBytes(sourceString);
            SHA512 shaM = new SHA512Managed();
            byte[] result = shaM.ComputeHash(data);
            StringBuilder EnText = new StringBuilder();
            foreach (byte iByte in result)
            {
                EnText.AppendFormat("{0:x2}", iByte);
            }
            return EnText.ToString();
        }

 

AES加密、解密

 

        /// <summary>
        /// AES加密
        /// </summary>
        /// <param name="encryptStr">加密字符串</param>
        /// <param name="encryptKey">密钥</param>
        /// <returns>密码</returns>
        public static string AESEncrypt(string encryptStr, string encryptKey)
        {
            if (string.IsNullOrWhiteSpace(encryptStr))
                return string.Empty;

            encryptKey = StringHelper.SubString(encryptKey, 32);
            encryptKey = encryptKey.PadRight(32, ' ');

            //分组加密算法
            SymmetricAlgorithm des = Rijndael.Create();
            byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptStr);//得到需要加密的字节数组 
            //设置密钥及密钥向量
            des.Key = Encoding.UTF8.GetBytes(encryptKey);
            des.IV = _aeskeys;
            byte[] cipherBytes = null;
            using (MemoryStream ms = new MemoryStream())
            {
                using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
                {
                    cs.Write(inputByteArray, 0, inputByteArray.Length);
                    cs.FlushFinalBlock();
                    cipherBytes = ms.ToArray();//得到加密后的字节数组
                    cs.Close();
                    ms.Close();
                }
            }
            return Convert.ToBase64String(cipherBytes);
        }

        /// <summary>
        /// AES解密
        /// </summary>
        /// <param name="decryptStr">解密字符串</param>
        /// <param name="decryptKey">密钥</param>
        /// <returns>原码</returns>
        public static string AESDecrypt(string decryptStr, string decryptKey)
        {
            if (string.IsNullOrWhiteSpace(decryptStr))
                return string.Empty;

            decryptKey = StringHelper.SubString(decryptKey, 32);
            decryptKey = decryptKey.PadRight(32, ' ');

            byte[] cipherText = Convert.FromBase64String(decryptStr);

            SymmetricAlgorithm des = Rijndael.Create();
            des.Key = Encoding.UTF8.GetBytes(decryptKey);
            des.IV = _aeskeys;
            byte[] decryptBytes = new byte[cipherText.Length];
            using (MemoryStream ms = new MemoryStream(cipherText))
            {
                using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Read))
                {
                    cs.Read(decryptBytes, 0, decryptBytes.Length);
                    cs.Close();
                    ms.Close();
                }
            }
            return Encoding.UTF8.GetString(decryptBytes).Replace("", "");//将字符串后尾的''去掉
        }

 

DES加密

　　

        /// <summary>
        /// DES加密字符串
        /// </summary>
        /// <param name="encryptString">待加密的字符串</param>
        /// <param name="encryptKey">加密密钥,要求为8位</param>
        /// <returns>加密成功返回加密后的字符串，失败返回源串</returns>
        public string EncryptDES(string encryptString, string encryptKey)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
                DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Convert.ToBase64String(mStream.ToArray());
            }
            catch
            {
                return encryptString;
            }
        }

        /// <summary>
        /// DES解密字符串
        /// </summary>
        /// <param name="decryptString">待解密的字符串</param>
        /// <param name="decryptKey">解密密钥,要求为8位,和加密密钥相同</param>
        /// <returns>解密成功返回解密后的字符串，失败返源串</returns>
        public string DecryptDES(string decryptString, string decryptKey)
        {
            try
            {
                byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(0, 8));
                byte[] rgbIV = Keys;
                byte[] inputByteArray = Convert.FromBase64String(decryptString);
                DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
                cStream.Write(inputByteArray, 0, inputByteArray.Length);
                cStream.FlushFinalBlock();
                return Encoding.UTF8.GetString(mStream.ToArray());
            }
            catch
            {
                return decryptString;
            }
        }

加密方法封装代码：

using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace EncryptTools
{
    public class EncryptHelper
    {
        /// <summary>
        /// 获取某个哈希算法对应下的哈希值
        /// </summary>
        /// <param name="sourceString">源字符串</param>
        /// <param name="algorithm">哈希算法</param>
        /// <returns>经过计算的哈希值</returns>
        private static string GetHash(string sourceString, HashAlgorithm algorithm)
        {
            byte[] sourceBytes = Encoding.UTF8.GetBytes(sourceString);
            byte[] result = algorithm.ComputeHash(sourceBytes);
            algorithm.Clear();
            StringBuilder sb = new StringBuilder(32);
            for (int i = 0; i < result.Length; i++)
            {
                sb.Append(result[i].ToString("X2"));
            }
            return sb.ToString();
        }

        /// <summary>
        /// 获取MD5值
        /// </summary>
        /// <param name="sourceString">源字符串</param>
        /// <returns>MD5值</returns>
        public static string GetMD5(string sourceString)
        {
            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
            return GetHash(sourceString, md5);
        }

        /// <summary>
        /// 获取SHA1值
        /// </summary>
        /// <param name="sourceString">源字符串</param>
        /// <returns>SHA1值</returns>
        public static string GetSHA1(string sourceString)
        {
            SHA1 sha1 = new SHA1CryptoServiceProvider();
            return GetHash(sourceString, sha1);
        }

        /// <summary>
        /// 获取SHA256值
        /// </summary>
        /// <param name="sourceString">源字符串</param>
        /// <returns>SHA256值</returns>
        public static string GetSHA256(string sourceString)
        {
            SHA256 sha256 = SHA256.Create();
            return GetHash(sourceString, sha256);
        }

        /// <summary>
        /// 获取SHA384值
        /// </summary>
        /// <param name="sourceString">源字符串</param>
        /// <returns>SHA384值</returns>
        public static string GetSHA384(string sourceString)
        {
            SHA384 sha384 = SHA384.Create();
            return GetHash(sourceString, sha384);
        }

        /// <summary>
        /// 获取SHA512值
        /// </summary>
        /// <param name="sourceString">源字符串</param>
        /// <returns>SHA512值</returns>
        public static string GetSHA512(string sourceString)
        {
            SHA512 sha512 = SHA512.Create();
            return GetHash(sourceString, sha512);
        }

        public static string GetFileBase64String(string filePath)
        {
            using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                using (BinaryReader reader = new BinaryReader(fs))
                {
                    try
                    {
                        return GetBase64String(reader.ReadBytes((int)fs.Length));
                    }
                    catch (System.Exception ex)
                    {
                        throw ex;
                    }
                }
            }
        }

        public static string GetBase64String(string sourceString)
        {
            byte[] buffer = Encoding.UTF8.GetBytes(sourceString);
            return GetBase64String(buffer);
        }

        public static string GetBase64String(string sourceString, Encoding encoding)
        {
            byte[] buffer = encoding.GetBytes(sourceString);
            return GetBase64String(buffer);
        }

        public static string GetBase64String(byte[] sourceBytes)
        {
            string base64String = System.Convert.ToBase64String(sourceBytes);
            return base64String;
        }
    }
}