public void CalculateKeyFromText(string a_text, string a_key)
{
if (HashFunction is ICrypto)
{
IHMAC hmac = HashFactory.HMAC.CreateHMAC(HashFunction);
hmac.Key = Converters.ConvertStringToBytes(a_key, Encoding.ASCII);
Hash = hmac.ComputeString(a_text, Encoding.ASCII).ToString();
}
else if (HashFunction is IWithKey)
{
IWithKey hash_with_key = HashFunction as IWithKey;
try
{
var key_bytes = Converters.ConvertStringToBytes(a_key, Encoding.ASCII);
if (key_bytes.Length == 0)
{
key_bytes = null;
}
hash_with_key.Key = key_bytes;
Hash = hash_with_key.ComputeString(a_text, Encoding.ASCII).ToString();
}
catch
{
Hash = "Error";
}
}
else
{
Debug.Assert(false);
}
}
protected override void Write(string key, T[] value)
{
if (key == "DSDE-167")
{
Console.WriteLine("!");
}
var mappedType = _autoMapperService.GetMappedType <T>();
_dao.Delete(mappedType, "Key=@key", new { key });
foreach (var item in value)
{
IWithKey dto = _autoMapperService.Map(item) as IWithKey;
dto.Key = key;
_dao.Write(mappedType, dto, allowMultipleWithSameKey: true);
}
}
public void CalculateKeyFromFile(string a_file, string a_key)
{
if (!(HashFunction is IHMAC) && (HashFunction is INonBlockHash))
{
if (new FileInfo(a_file).Length > 200 * 1024 * 1024)
{
Hash = "Hashing skipped. File is too big and algorithm does not provide multiple transforms capabilities";
return;
}
}
if (HashFunction is ICrypto)
{
IHMAC hmac = HashFactory.HMAC.CreateHMAC(HashFunction);
hmac.Key = Converters.ConvertStringToBytes(a_key, Encoding.ASCII);
Hash = hmac.ComputeFile(a_file).ToString();
}
else if (HashFunction is IWithKey)
{
IWithKey hash_with_key = HashFunction as IWithKey;
try
{
var key_bytes = Converters.ConvertStringToBytes(a_key, Encoding.ASCII);
if (key_bytes.Length == 0)
{
key_bytes = null;
}
hash_with_key.Key = key_bytes;
Hash = hash_with_key.ComputeFile(a_file).ToString();
}
catch
{
Hash = "Error";
}
}
else
{
Debug.Assert(false);
}
}
