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**stefxx** · November 8, 2021, 01:44 PM

Base64Encoded?

**bradleyward** · November 8, 2021, 04:51 PM

Originally posted by stefxx View Post

Base64Encoded?

I had briefly tried Base64 decoding before, but not spent much time on it. Since you mentioned it, I spent some more time on it. It does seem to be a Base64 encoded string, but it has some binary bytes as well as ASCII bytes.

Also, the Base64 string that are values of named properties in the PlugExtraData.NamedKeys array seem to have double quote characters appended to the start and end of the string.

Below I show the NamedKeys values for one of my Z-Wave devices. Fore each named keys that appears to be Base64 encoded, I show the raw string (straight from NamedKeys) and then on the next line I show the (somewhat) decoded string, decoded with the following code:

else if (keyValue.StartsWith(""AAEAAAD"))
{
// This value is Base64 encoded
// ----------------------------
try
{
// Remove the starting and ending " characters
// -------------------------------------------
string encodedString = keyValue.Substring(1, keyValue.Length - 2);
byte[] data = Convert.FromBase64String(encodedString);
string decodedString = Encoding.UTF8.GetString(data);

StringBuilder s = new StringBuilder();

// Before trying to display the decoded string, change any
// control characters (non-printable binary values) to '~'
// -------------------------------------------------------
foreach (char c in decodedString)
{
if (char.IsControl(c))
{
s.Append('~');
}
else
{
s.Append(c);
}
}
keyValue = keyValue + newline + s.ToString();
}
catch (Exception ex)
{
keyValue = keyValue + newline + ex.ToString();
}
}

The output is shown in the attached results.txt file. Hard to read I know, but note that each decoded Base64 property appears to perhaps be an encoded object that is somehow related to the HSPI_ZWave module version 3.0.2.0.

Any ideas?

Attached Files

results.txt (7.0 KB, 7 views)

**stefxx** · November 9, 2021, 03:29 AM

Not sure. I guess it is binary, converted to BASE64 so it can be stored without issues.

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