通过本文主要向大家介绍了c#字符串加密解密,c#字符串截取,c#字符串转数字,c#字符串分割,c#字符串拼接等相关知识,希望对您有所帮助,也希望大家支持linkedu.com www.linkedu.com
第一个为大家分享的是C#字符串使用密钥进行加解密代码，具体内容如下
public class DesEncrypt
{
/// <summary>
/// 算法偏移量
/// </summary>
const string m_IV = "12345678";
/// <summary>
/// 功能描述:根据输入的密钥生成8位密钥
/// 作 者: 爱给模板网 2gei.cn
/// 创建日期:2015-07-20 17:25:26
/// </summary>
/// <param name="strkey">strkey</param>
/// <returns>8位密钥</returns>
private static string GetKey(string strkey)
{
if (string.IsNullOrEmpty(strkey))
{
strkey = "InfoColl";
}
if (strkey.Length % 8 == 0)
{
return strkey;
}
else
{
return GetKey(strkey + "0");
}
}
/// <summary>
/// 功能描述:加密字符串
/// 作 者: 爱给模板网 2gei.cn
/// 创建日期:2015-07-20 17:18:31
/// 任务编号:
/// </summary>
/// <param name="strSourceString">原字符串</param>
/// <param name="strKey">密钥</param>
/// <returns>加密后的字符串</returns>
public static string Encrypt(string strSourceString, string strKey)
{
strKey = GetKey(strKey);
byte[] btKey = Encoding.UTF8.GetBytes(strKey);
byte[] btIV = Encoding.UTF8.GetBytes(m_IV);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
using (MemoryStream ms = new MemoryStream())
{
try
{
byte[] inData = Encoding.UTF8.GetBytes(strSourceString);
using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write))
{
cs.Write(inData, 0, inData.Length);
cs.FlushFinalBlock();
}
return Convert.ToBase64String(ms.ToArray());
}
catch
{
return strSourceString;
}
}
}
/// <summary>
/// 功能描述:解密字符串
/// 作 者: 爱给模板网 2gei.cn
/// 创建日期:2015-07-20 17:18:49
/// 任务编号:
/// </summary>
/// <param name="strEncryptedString">原字符串</param>
/// <param name="strKey">密钥</param>
/// <returns>解密后的字符串</returns>
public static string Decrypt(string strEncryptedString, string strKey)
{
strKey = GetKey(strKey);
byte[] btKey = Encoding.UTF8.GetBytes(strKey);
byte[] btIV = Encoding.UTF8.GetBytes(m_IV);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
using (MemoryStream ms = new MemoryStream())
{
try
{
byte[] inData = Convert.FromBase64String(strEncryptedString);
using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
{
cs.Write(inData, 0, inData.Length);
cs.FlushFinalBlock();
}
return Encoding.UTF8.GetString(ms.ToArray());
}
catch
{
return strEncryptedString;
}
}
}
}
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C#字符串加密和解密
using System.Security.Cryptography;
using System.IO;
//默认密钥向量
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
/// <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 static string EncryptDES(string encryptString, string encryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));//转换为字节
byte[] rgbIV = Keys;
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();//实例化数据加密标准
MemoryStream mStream = new MemoryStream();//实例化内存流
//将数据流链接到加密转换的流
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 static string DecryptDES(string decryptString, string decryptKey)
{
try
{
byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
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;
}
}
string EncryptStr = EncryptDESString.EncryptDES("aaaaaaaaaa", "ssssssss"); //返回加密后的字符串
string DecryptStr = EncryptDESString.DecryptDES(EncryptStr, "ssssssss");//解密字符串
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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