Re: Using IDNA_USE_STD3_ASCII_RULES still almost everything is accepted

[Simon Josefsson]

Martijn Otto <address@hidden> writes:

> Hello,
>
> I have attached a very simple program which I believe displays a
> serious problem in libidn. Even using IDNA_USE_STD3_ASCII_RULES it
> still happily accepts almost anything.
>
> Maybe I misunderstood and libidn is not designed for this kind of
> thing. If so, could you suggest a better alternative?

Hello.

What is it that you are trying to do?  I don't understand what you mean
by ".org" being invalid.  All-ASCII things like ".org" will not be
converted to Unicode, this is how IDNA works.

/Simon

> With regards,
> Martijn Otto
>
> #include <idna.h>
> #include <stdio.h>
> #include <stdlib.h>
>
> int main()
> {
>     // input, output and result of the operation
>     char *output;
>     int  result;
>
>     // try to convert the invalid domain name
>     result = idna_to_unicode_8z8z(".org", &output, IDNA_USE_STD3_ASCII_RULES);
>
>     // the .org domain is obviously bogus, so we expect an error
>     if (result != IDNA_SUCCESS) return 0;
>
>     // idna considered the bogus name valid, this is an error
>     fprintf(stderr, "libidn considered our bogus domain name valid, and 
> converted it to: '%s'\n", output);
>     free(output);
>
>     // something went wrong
>     return 1;
> }
>
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