private void btnDe_Click(object sender, EventArgs e)
{
byte[] result = null;
try
{
StringFormatTypes stringType = (StringFormatTypes)Enum.Parse(typeof(StringFormatTypes), this.cmbStringFormatType.Text);
CipherMode cipherMode = (CipherMode)Enum.Parse(typeof(CipherMode), this.cmbCipherMode.Text);
PaddingMode paddingMode = (PaddingMode)Enum.Parse(typeof(PaddingMode), this.cmbPaddingMode.Text);
if (this.cmbAlgorithm.Text == "DES")
{
result = this.txtCipherText.Text.DESDecrypt(key1, key2, stringType, cipherMode, paddingMode);
}
else if (this.cmbAlgorithm.Text == "TripleDES/DESede")
{
result = this.txtCipherText.Text.DESedeDecrypt(key1, key2, stringType, cipherMode, paddingMode);
}
if (result != null)
{
this.txtSource.Text = result.ToString(StringFormatTypes.None);
}
}
catch (Exception ex)
{
MessageBox.Show(this, ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
/// <summary>
///
/// </summary>
/// <param name="bytes"></param>
/// <param name="destFormatType">目标字符串格式类型</param>
/// <param name="charset"></param>
/// <returns></returns>
public static string ToString(this byte[] bytes, StringFormatTypes destFormatType = StringFormatTypes.None, string charset = "UTF-8")
{
if (destFormatType == StringFormatTypes.BASE64)
{
return(Convert.ToBase64String(bytes));
}
else if (destFormatType == StringFormatTypes.HEX)
{
return(string.Join(string.Empty, bytes.Select(x => x.ToString("X2"))));
//return BitConverter.ToString(bytes).Replace("-", "");
}
else
{
return(Encoding.GetEncoding(charset).GetString(bytes));
}
}
/// <summary>
/// 源字符串转化为字节数组
/// </summary>
/// <param name="source">源字符串</param>
/// <param name="sourceFormatType">源字符串的字符串格式类型</param>
/// <param name="charset">字符集</param>
/// <returns>字节数组</returns>
public static byte[] ToByteArray(this string source, StringFormatTypes sourceFormatType = StringFormatTypes.None, string charset = "UTF-8")
{
if (sourceFormatType == StringFormatTypes.BASE64)
{
return(Convert.FromBase64String(source));
}
else if (sourceFormatType == StringFormatTypes.HEX)
{
int len = source.Length;
byte[] bytes = new byte[len / 2];
for (int i = 0; i < len; i += 2)
{
bytes[i / 2] = Convert.ToByte(source.Substring(i, 2), 16);
}
return(bytes);
}
else
{
return(Encoding.GetEncoding(charset).GetBytes(source));
}
}
/// <summary>
/// 解密
/// </summary>
/// <param name="source"></param>
/// <param name="key"></param>
/// <param name="iv"></param>
/// <param name="sourceFormatType"></param>
/// <param name="cipherMode"></param>
/// <param name="paddingMode"></param>
/// <returns></returns>
public static byte[] DESDecrypt(this string source, string key, string iv, StringFormatTypes sourceFormatType = StringFormatTypes.BASE64, CipherMode cipherMode = CipherMode.CBC, PaddingMode paddingMode = PaddingMode.PKCS7)
{
var provider = new DESCryptoServiceProvider();
provider.Mode = cipherMode;
provider.Padding = paddingMode;
using (MemoryStream memoryStream = new MemoryStream())
{
byte[] rgbKey = key.ToByteArray(StringFormatTypes.None);
byte[] rgbIV = iv.ToByteArray(StringFormatTypes.None);
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, provider.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write))
{
byte[] buffer = source.ToByteArray(sourceFormatType);
cryptoStream.Write(buffer, 0, buffer.Length);
cryptoStream.FlushFinalBlock();
}
return(memoryStream.ToArray());
}
}
/// <summary>
/// 源字符串转化为指定字符串格式类型的字符串
/// </summary>
/// <param name="source">源字符串</param>
/// <param name="sourceFormatType">源字符串格式类型</param>
/// <param name="destFormatType">目标字符串格式类型</param>
/// <param name="charset">字符集类型</param>
/// <returns>指定字符串格式类型的字符串</returns>
public static string ToString(this string source, StringFormatTypes sourceFormatType = StringFormatTypes.None, StringFormatTypes destFormatType = StringFormatTypes.None, string charset = "UTF-8")
{
return(source.ToByteArray(sourceFormatType, charset).ToString(destFormatType, charset));
}
/// <summary>
/// 解密
/// </summary>
/// <param name="source"></param>
/// <param name="key"></param>
/// <param name="sourceFormatType"></param>
/// <param name="cipherMode"></param>
/// <param name="paddingMode"></param>
/// <returns></returns>
public static byte[] DESDecrypt(this string source, string key, StringFormatTypes sourceFormatType = StringFormatTypes.BASE64, CipherMode cipherMode = CipherMode.CBC, PaddingMode paddingMode = PaddingMode.PKCS7)
{
return(DESDecrypt(source, key, key, sourceFormatType, cipherMode, paddingMode));
}
