//获取随机DESKey
private void btnGetDESKey_Click(object sender, EventArgs e)
{
if (txtMd5Key.Text.Length <= 0)
{
MessageBox.Show("请输出DesKey");
}
txtDesKey.Text = OtherCrypt.GetMd5(txtMd5Key.Text).Substring(0, 8);
}
/// <summary>
/// AES加密
/// </summary>
/// <param name="Key">密钥</param>
/// <param name="plainStr">明文字符串</param>
/// <param name="ivStr">加密向量</param>
/// <param name="cMode">加密模式</param>
/// <param name="pMode">填充模式</param>
/// <returns>密文</returns>
public static String Encrypt(String Key, String plainStr, String ivStr = "", CipherMode cMode = CipherMode.ECB, PaddingMode pMode = PaddingMode.PKCS7)
{
var aes = new RijndaelManaged();
//秘钥的大小，以位为单位
aes.KeySize = 256;
//支持的块大小
aes.BlockSize = 128;
//填充模式
aes.Padding = pMode;
aes.Mode = cMode;
//aes.Key = Convert.FromBase64String(Key);
aes.Key = Encoding.Default.GetBytes(OtherCrypt.GetMd5(Key));//采用MD5加密一次，密钥可变长度
aes.IV = IV;
if (ivStr.Length > 0)
{
if (ivStr.StartsWith("0x"))
{
aes.IV = HexToByte(ivStr.Substring(2));
}
else
{
//aes.IV = Encoding.Default.GetBytes(OtherCrypt.GetMd5(ivStr).Substring(0, 16));
aes.IV = Encoding.Default.GetBytes(ivStr);
}
}
var encrypt = aes.CreateEncryptor(aes.Key, aes.IV);
byte[] xBuff = new byte[0];
using (var ms = new MemoryStream())
{
using (var cs = new CryptoStream(ms, encrypt, CryptoStreamMode.Write))
{
byte[] xXml = Encoding.UTF8.GetBytes(plainStr);
cs.Write(xXml, 0, xXml.Length);
}
xBuff = ms.ToArray();
}
return(Convert.ToBase64String(xBuff));
}
//MD5加密算法
private void btnEncrypt5_Click(object sender, EventArgs e)
{
txtCiphertext5.Text = OtherCrypt.GetMd5(txtPlaintext5.Text);
}