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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.Security.Cryptography; namespace Rare.Card.Libary.Security { /// <summary> /// 构造一个对称算法,使用3Des加密 ///如果当前的 Key 属性为 NULL,可调用 GenerateKey 方法以创建新的随机 Key。 ///如果当前的 IV 属性为 NULL,可调用 GenerateIV 方法以创建新的随机 IV /// </summary> public class CryptoTripleDes { //加密矢量 private static byte[] IV = { 0xB0, 0xA2, 0xB8, 0xA3, 0xDA, 0xCC, 0xDA, 0xCC }; /// <summary> /// 使用指定的128字节的密钥对8字节数组进行3Des加密 /// </summary> /// <param name="keys">密钥,16字节,128位</param> /// <param name="values">要加密的数组</param> /// <returns>已加密的数组</returns> public static byte[] CreateEncryptByte(byte[] keys, byte[] values) { TripleDESCryptoServiceProvider tdsc = new TripleDESCryptoServiceProvider(); //指定密匙长度,默认为192位 tdsc.KeySize = 128; //使用指定的key和IV(加密向量) tdsc.Key = keys; tdsc.IV = IV; //加密模式,偏移 tdsc.Mode = CipherMode.ECB; tdsc.Padding = PaddingMode.None; //进行加密转换运算 ICryptoTransform ct = tdsc.CreateEncryptor(); //8很关键,加密结果是8字节数组 byte[] results = ct.TransformFinalBlock(values, 0, 8); return results; } /// <summary> /// 使用指定的128字节的密钥对字符串(8位)进行3Des加密 /// </summary> /// <param name="strKey"></param> /// <param name="strValue"></param> /// <returns></returns> public static byte[] CreateEncryptString(string strKey, string strValue) { TripleDESCryptoServiceProvider tdsc = new TripleDESCryptoServiceProvider(); byte[] results = new byte[strValue.Length]; tdsc.KeySize = 128; if (!string.IsNullOrEmpty(strKey)) { tdsc.Key = Encoding.UTF8.GetBytes(strKey); } tdsc.IV = IV; using (ICryptoTransform ct = tdsc.CreateDecryptor()) { byte[] byt = Encoding.UTF8.GetBytes(strValue); results = ct.TransformFinalBlock(byt, 0, 8); } return results; } /// <summary> /// 对加密字符串进行解密 /// </summary> /// <param name="keys">密匙</param> /// <param name="values">已加密字符串</param> /// <returns>解密结果</returns> public static byte[] CreateDescryptByte(byte[] keys, byte[] values) { TripleDESCryptoServiceProvider tdsc = new TripleDESCryptoServiceProvider(); //指定密匙长度,默认为192位 tdsc.KeySize = 128; //使用指定的key和IV(加密向量) tdsc.Key = keys; tdsc.IV = IV; //加密模式,偏移 tdsc.Mode = CipherMode.ECB; tdsc.Padding = PaddingMode.None; //进行加密转换运算 ICryptoTransform ct = tdsc.CreateDecryptor(); //8很关键,加密结果是8字节数组 byte[] results = ct.TransformFinalBlock(values, 0, 8); return results; } } }
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