C# 常用加密解密帮助类

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public static class EncryptUtil{ #region MD5加密 /// <summary> /// MD5加密 /// </summary> public static string Md532(this string value) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; MD5 md5 = MD5.Create(); return HashAlgorithmBase(md5, value, encoding); } /// <summary> /// 加权MD5加密 /// </summary> public static string Md532(this string value, string salt) { return salt == null ? value.Md532() : (value + "『" + salt + "』").Md532(); } #endregion #region SHA 加密 /// <summary> /// SHA1 加密 /// </summary> public static string Sha1(this string value) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; SHA1 sha1 = new SHA1CryptoServiceProvider(); return HashAlgorithmBase(sha1, value, encoding); } /// <summary> /// SHA256 加密 /// </summary> public static string Sha256(this string value) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; SHA256 sha256 = new SHA256Managed(); return HashAlgorithmBase(sha256, value, encoding); } /// <summary> /// SHA512 加密 /// </summary> public static string Sha512(this string value) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; SHA512 sha512 = new SHA512Managed(); return HashAlgorithmBase(sha512, value, encoding); } #endregion #region HMAC 加密 /// <summary> /// HmacSha1 加密 /// </summary> public static string HmacSha1(this string value, string keyVal) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; byte[] keyStr = encoding.GetBytes(keyVal); HMACSHA1 hmacSha1 = new HMACSHA1(keyStr); return HashAlgorithmBase(hmacSha1, value, encoding); } /// <summary> /// HmacSha256 加密 /// </summary> public static string HmacSha256(this string value, string keyVal) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; byte[] keyStr = encoding.GetBytes(keyVal); HMACSHA256 hmacSha256 = new HMACSHA256(keyStr); return HashAlgorithmBase(hmacSha256, value, encoding); } /// <summary> /// HmacSha384 加密 /// </summary> public static string HmacSha384(this string value, string keyVal) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; byte[] keyStr = encoding.GetBytes(keyVal); HMACSHA384 hmacSha384 = new HMACSHA384(keyStr); return HashAlgorithmBase(hmacSha384, value, encoding); } /// <summary> /// HmacSha512 加密 /// </summary> public static string HmacSha512(this string value, string keyVal) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; byte[] keyStr = encoding.GetBytes(keyVal); HMACSHA512 hmacSha512 = new HMACSHA512(keyStr); return HashAlgorithmBase(hmacSha512, value, encoding); } /// <summary> /// HmacMd5 加密 /// </summary> public static string HmacMd5(this string value, string keyVal) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; byte[] keyStr = encoding.GetBytes(keyVal); HMACMD5 hmacMd5 = new HMACMD5(keyStr); return HashAlgorithmBase(hmacMd5, value, encoding); } /// <summary> /// HmacRipeMd160 加密 /// </summary> public static string HmacRipeMd160(this string value, string keyVal) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; byte[] keyStr = encoding.GetBytes(keyVal); HMACRIPEMD160 hmacRipeMd160 = new HMACRIPEMD160(keyStr); return HashAlgorithmBase(hmacRipeMd160, value, encoding); } #endregion #region AES 加密解密 /// <summary> /// AES加密 /// </summary> /// <param name="value">待加密字段</param> /// <param name="keyVal">密钥值</param> /// <param name="ivVal">加密辅助向量</param> /// <returns></returns> public static string AesStr(this string value, string keyVal, string ivVal) { if (value == null) { throw new ArgumentNullException("未将对象引用设置到对象的实例。"); } var encoding = Encoding.UTF8; byte[] btKey = keyVal.FormatByte(encoding); byte[] btIv = ivVal.FormatByte(encoding); byte[] byteArray = encoding.GetBytes(value); string encrypt; Rijndael aes = Rijndael.Create(); using (MemoryStream mStream = new MemoryStream()) { using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(btKey, btIv), CryptoStreamMode.Write)) { cStream.Write(byteArray, , byteArray.Length); cStream.FlushFinalBlock(); encrypt = Convert.ToBase64String(mStream.ToArray()); } } aes.Clear(); return encrypt; } /// <summary> /// AES解密 /// </summary> /// <param name="value">待加密字段</param> /// <param name="keyVal">密钥值</param> /// <param name="ivVal">加密辅助向量</param> /// <returns></returns> public static string UnAesStr(this string value, string keyVal, string ivVal) { var encoding = Encoding.UTF8; byte[] btKey = keyVal.FormatByte(encoding); byte[] btIv = ivVal.FormatByte(encoding); byte[] byteArray = Convert.FromBase64String(value); string decrypt; Rijndael aes = Rijndael.Create(); using (MemoryStream mStream = new MemoryStream()) { using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(btKey, btIv), CryptoStreamMode.Write)) { cStream.Write(byteArray, , byteArray.Length); cStream.FlushFinalBlock(); decrypt = encoding.GetString(mStream.ToArray()); } } aes.Clear(); return decrypt; } /// <summary> /// AES Byte类型加密 /// </summary> /// <param name="data">待加密明文</param> /// <param name="keyVal">密钥值</param> /// <param name="ivVal">加密辅助向量</param> /// <returns></returns> public static byte[] AesByte(this byte[] data, string keyVal, string ivVal) { ]; Array.Copy(Encoding.UTF8.GetBytes(keyVal.PadRight(bKey.Length)), bKey, bKey.Length); ]; Array.Copy(Encoding.UTF8.GetBytes(ivVal.PadRight(bVector.Length)), bVector, bVector.Length); byte[] cryptograph; Rijndael aes = Rijndael.Create(); try { using (MemoryStream mStream = new MemoryStream()) { using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateEncryptor(bKey, bVector), CryptoStreamMode.Write)) { cStream.Write(data, , data.Length); cStream.FlushFinalBlock(); cryptograph = mStream.ToArray(); } } } catch { cryptograph = null; } return cryptograph; } /// <summary> /// AES Byte类型解密 /// </summary> /// <param name="data">待解密明文</param> /// <param name="keyVal">密钥值</param> /// <param name="ivVal">加密辅助向量</param> /// <returns></returns> public static byte[] UnAesByte(this byte[] data, string keyVal, string ivVal) { ]; Array.Copy(Encoding.UTF8.GetBytes(keyVal.PadRight(bKey.Length)), bKey, bKey.Length); ]; Array.Copy(Encoding.UTF8.GetBytes(ivVal.PadRight(bVector.Length)), bVector, bVector.Length); byte[] original; Rijndael aes = Rijndael.Create(); try { using (MemoryStream mStream = new MemoryStream(data)) { using (CryptoStream cStream = new CryptoStream(mStream, aes.CreateDecryptor(bKey, bVector), CryptoStreamMode.Read)) { using (MemoryStream originalMemory = new MemoryStream()) { ]; int readBytes; , buffer.Length)) > ) { originalMemory.Write(buffer, , readBytes); } original = originalMemory.ToArray(); } } } } catch { original = null; } return original; } #endregion #region DES 加密解密 /// <summary> /// DES 加密 /// </summary> public static string Des(this string value, string keyVal, string ivVal) { try { byte[] data = Encoding.UTF8.GetBytes(value); ? keyVal.Substring(, ) : keyVal), IV = Encoding.ASCII.GetBytes(ivVal.Length > ? ivVal.Substring(, ) : ivVal) }; var desencrypt = des.CreateEncryptor(); , data.Length); return BitConverter.ToString(result); } catch { return "转换出错！"; } } /// <summary> /// DES 解密 /// </summary> public static string UnDes(this string value, string keyVal, string ivVal) { try { string[] sInput = value.Split("-".ToCharArray()); byte[] data = new byte[sInput.Length]; ; i < sInput.Length; i++) { data[i] = byte.Parse(sInput[i], NumberStyles.HexNumber); } ? keyVal.Substring(, ) : keyVal), IV = Encoding.ASCII.GetBytes(ivVal.Length > ? ivVal.Substring(, ) : ivVal) }; var desencrypt = des.CreateDecryptor(); , data.Length); return Encoding.UTF8.GetString(result); } catch { return "解密出错！"; } } #endregion #region BASE64 加密解密 /// <summary> /// BASE64 加密 /// </summary> /// <param name="value">待加密字段</param> /// <returns></returns> public static string Base64(this string value) { var btArray = Encoding.UTF8.GetBytes(value); , btArray.Length); } /// <summary> /// BASE64 解密 /// </summary> /// <param name="value">待解密字段</param> /// <returns></returns> public static string UnBase64(this string value) { var btArray = Convert.FromBase64String(value); return Encoding.UTF8.GetString(btArray); } #endregion #region Base64加密解密 /// <summary> /// Base64加密可逆 /// </summary> /// <param name="value">待加密文本</param> /// <returns></returns> public static string Base64Encrypt(string value) { return Convert.ToBase64String(System.Text.Encoding.Default.GetBytes(value)); } /// <summary> /// Base64解密 /// </summary> /// <param name="ciphervalue">密文</param> /// <returns></returns> public static string Base64Decrypt(string ciphervalue) { return System.Text.Encoding.Default.GetString(System.Convert.FromBase64String(ciphervalue)); } #endregion #region 内部方法 /// <summary> /// 转成数组 /// </summary> private static byte[] Str2Bytes(this string source) { source = source.Replace(" ", ""); ]; ; i < source.Length; i += ) buffer[i / ] = Convert.ToByte(source.Substring(i, ), ); return buffer; } /// <summary> /// 转换成字符串 /// </summary> private static string Bytes2Str(this IEnumerable<byte> source, string formatStr = "{0:X2}") { StringBuilder pwd = new StringBuilder(); foreach (byte btStr in source) { pwd.AppendFormat(formatStr, btStr); } return pwd.ToString(); } private static byte[] FormatByte(this string strVal, Encoding encoding) { , ).ToUpper()); } /// <summary> /// HashAlgorithm 加密统一方法 /// </summary> private static string HashAlgorithmBase(HashAlgorithm hashAlgorithmObj, string source, Encoding encoding) { byte[] btStr = encoding.GetBytes(source); byte[] hashStr = hashAlgorithmObj.ComputeHash(btStr); return hashStr.Bytes2Str(); } #endregion}

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