/// <summary>Try to validate the token header, according to the <paramref name="header"/>.</summary>
/// <returns><c>true</c> if the <paramref name="header"/> is valid. <c>false</c> otherwise.</returns>
public bool TryValidateHeader(JwtHeaderDocument header, [NotNullWhen(false)] out TokenValidationError?error)
{
if (!IgnoreCriticalHeader)
{
if (!header.Crit.IsEmpty)
{
var handlers = CriticalHandlers;
foreach (var critHeader in header.Crit.EnumerateArray <string>())
{
var critHeaderName = critHeader.GetString() !;
if (!handlers.TryGetValue(critHeaderName, out var handler))
{
error = TokenValidationError.CriticalHeaderUnsupported(critHeaderName);
goto Error;
}
if (!handler.TryHandle(header, critHeaderName))
{
error = TokenValidationError.InvalidHeader(critHeaderName);
goto Error;
}
}
}
}
error = null;
return(true);
Error:
return(false);
}
