/// <summary>
/// Initializes a new instance of the <see cref="EncryptionService"/> class.
/// </summary>
/// <param name="encryptionDTO">The encryption dto.</param>
/// <exception cref="ArgumentNullException">
/// encryptionDTO
/// or
/// UserName
/// or
/// Password
/// or
/// InputFileName
/// or
/// OutputFileName
/// </exception>
public EncryptionService(EncryptionDTO encryptionDTO)
{
_encryptionDTO = encryptionDTO ?? throw new ArgumentNullException(nameof(encryptionDTO));
if (string.IsNullOrEmpty(encryptionDTO.UserName))
{
throw new ArgumentNullException(nameof(encryptionDTO.UserName));
}
if (string.IsNullOrEmpty(encryptionDTO.Password))
{
throw new ArgumentNullException(nameof(encryptionDTO.Password));
}
if (string.IsNullOrEmpty(encryptionDTO.InputFileName))
{
throw new ArgumentNullException(nameof(encryptionDTO.InputFileName));
}
if (string.IsNullOrEmpty(encryptionDTO.OutputFileName))
{
throw new ArgumentNullException(nameof(encryptionDTO.OutputFileName));
}
}
public EncryptionDTO StandardMD5Decryption(string cipher)
{
using (var md5 = new MD5CryptoServiceProvider())
{
using (var tdes = new TripleDESCryptoServiceProvider())
{
EncryptionDTO result = new EncryptionDTO();
result.Key = MD5Property.StandardMD5Key;
result.CipherText = cipher;
tdes.Key = md5.ComputeHash(UTF8Encoding.UTF8.GetBytes(result.Key));
tdes.Mode = CipherMode.ECB;
tdes.Padding = PaddingMode.PKCS7;
using (var transform = tdes.CreateDecryptor())
{
byte[] cipherBytes = Convert.FromBase64String(result.CipherText);
byte[] bytes = transform.TransformFinalBlock(cipherBytes, 0, cipherBytes.Length);
result.PlainText = UTF8Encoding.UTF8.GetString(bytes);
return(result);
}
}
}
}
