/// <summary>
/// Aes 加密，随机生成16位IV。
/// </summary>
/// <param name="val"></param>
/// <returns></returns>
public static string EncryptWithKey(string enKey, string val)
{
// LogUtil.HWLogger.DEFAULT.InfoFormat("EncryptWithKey->enKey={0},val={1}", enKey, val);
if (string.IsNullOrEmpty(val))
{
return(val);
}
try
{
using (AesManaged aes = new AesManaged())
{
var toEncryptBytes = Encoding.UTF8.GetBytes(val);
byte[] enKeyByte = Convert.FromBase64String(enKey);
aes.Key = enKeyByte;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.Zeros;
aes.IV = GetSafeRandomIV();
using (var encryptor = aes.CreateEncryptor(aes.Key, aes.IV))
{
using (CustomeStream ms = new CustomeStream())
{
ms.Write(aes.IV, 0, 16);
using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(toEncryptBytes, 0, toEncryptBytes.Length);
cs.FlushFinalBlock();
byte[] bytes = (byte[])ms.ToArray();
return(Convert.ToBase64String(bytes));
}
}
}
}
}
catch (CryptographicException e)
{
LogUtil.HWLogger.DEFAULT.Error("A Cryptographic error occurred:", e);
if (string.IsNullOrWhiteSpace(val))
{
return("");
}
else
{
return(val);
}
}
catch (FormatException fe)
{
LogUtil.HWLogger.DEFAULT.Error("A FormatException error occurred:", fe);
if (string.IsNullOrWhiteSpace(val))
{
return("");
}
else
{
return(val);
}
}
}
/// <summary>
/// Aes解密。
/// </summary>
/// <param name="val">需要解密的字符串</param>
/// <returns></returns>
public static string DecryptWithKey(string enKey, string val)
{
try
{
String retVal = "";
if (string.IsNullOrEmpty(val))
{
return("");
}
using (AesManaged aes = new AesManaged())
{
byte[] inputByteArray = Convert.FromBase64String(val.Trim());
byte[] enKeyByte = Convert.FromBase64String(enKey);
aes.Key = enKeyByte;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.Zeros;
using (CustomeStream ms = new CustomeStream(inputByteArray))
{
byte[] iv = new byte[16];
ms.Read(iv, 0, iv.Length);
// Array.Copy(inputByteArray, 0, iv, 0, iv.Length);
aes.IV = iv;
using (var decryptor = aes.CreateDecryptor(aes.Key, aes.IV))
{
using (var cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read))
{
using (var sr = new StreamReader(cs))
{
retVal = sr.ReadToEnd().Trim('\0');
}
}
}
}
}
//LogUtil.HWLogger.DEFAULT.InfoFormat("DecryptWithKey->enKey={0},val={1},retVal={2}", enKey, val, retVal);
return(retVal);
}
catch (CryptographicException e)
{
LogUtil.HWLogger.DEFAULT.Error("A Cryptographic error occurred:", e);
if (string.IsNullOrWhiteSpace(val))
{
return("");
}
else
{
return(val);
}
}
catch (FormatException fe)
{
LogUtil.HWLogger.DEFAULT.Error("A FormatException error occurred:", fe);
if (string.IsNullOrWhiteSpace(val))
{
return("");
}
else
{
return(val);
}
}
}
