private static string ExtractPolicyText(string jwt)
{
string parsedPolicy = string.Empty;
if (!string.IsNullOrEmpty(jwt))
{
try
{
parsedPolicy = JoseHelper.ExtractJosePartField(jwt, 1, "AttestationPolicy").ToString();
// Policy is optionally double base64 URL encoded. We will attempt
// to base64 URL decode a second time -- if this throws an exception,
// that's OK -- we should just use value as it stands now.
var doubleDecodedPolicy = Base64Url.DecodeString(parsedPolicy);
parsedPolicy = doubleDecodedPolicy;
}
catch (Exception)
{
// Ignore on purpose
}
}
return(parsedPolicy);
}