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Java和.NET的DES加密

2014年11月10日技术暂无评论阅读 2,633 次

.NET的DES加密算法如下：

/// <summary>
/// DES加密算法必须使用Base64的Byte对象
/// </summary>
/// <param name="data">待加密的字符数据</param>
/// <param name="key">密匙，长度必须为64位（byte[8]）)</param>
/// <param name="iv">iv向量，长度必须为64位（byte[8]）</param>
/// <returns>加密后的字符</returns>
private string EnDES(string data, byte[] key, byte[] iv)
{
DES des = DES.Create();
//这行代码很重要,需要根据不同的字符串选择不同的转换格式
byte[] tmp = Encoding.Unicode.GetBytes(data);
Byte[] encryptoData;
ICryptoTransform encryptor = des.CreateEncryptor(key, iv);
using (MemoryStream memoryStream = new MemoryStream())
{
using (var cs = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter writer = new StreamWriter(cs))
{
writer.Write(data);
writer.Flush();
}
}
encryptoData = memoryStream.ToArray();
}
des.Clear();
return Convert.ToBase64String(encryptoData);
}
/// <summary>
/// DES解密算法
/// </summary>
/// <param name="data">待加密的字符数据</param>
/// <param name="key">密匙，长度必须为64位（byte[8]）)</param>
/// <param name="iv">iv向量，长度必须为64位（byte[8]）</param>
/// <returns>加密后的字符</returns>
private string DeDes(string data, Byte[] key, Byte[] iv)
{
string resultData = string.Empty;
//这行代码很重要
Byte[] tmpData = Convert.FromBase64String(data);//转换的格式挺重要
DES des = DES.Create();
ICryptoTransform decryptor = des.CreateDecryptor(key, iv);
using (var memoryStream = new MemoryStream(tmpData))
{
using (var cs = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
{
StreamReader reader = new StreamReader(cs);
resultData = reader.ReadLine();
}
}
return resultData;
}