Re: Question on asn1_read_value (buffer/truncation)

[Jeffrey Walton]

On Sun, Nov 28, 2010 at 3:40 PM, Simon Josefsson <address@hidden> wrote:
> Jeffrey Walton <address@hidden> writes:
>
>> On Sun, Nov 28, 2010 at 2:54 PM, Simon Josefsson <address@hidden> wrote:
>>> Jeffrey Walton <address@hidden> writes:
>>>
>>>> Hi All,
>>>>
>>>> I've read the documentation on asn1_read_value at asn1_read_value. I'm
>>>> not clear on what happens if the buffer provided to asn1_read_value is
>>>> too small.
>>>>
>>>> Does (1) asn1_read_value fail, (2) does the function copy bytes up to
>>>> size of the buffer and return truncation, or (3) copy up to size of
>>>> the buffer and succeed?
>>>
>>> See the 'Returns' description:
>>>
>>>   ASN1_MEM_ERROR: The value vector isn't big enough to store the
>>>   result. In this case LEN will contain the number of bytes needed.
>>>
>>> The contents of the buffer is undefined at that point.
>> OK. Thanks.
>>
>> BTW, the copy I consulted does not offer return values:
>> http://www.gnu.org/software/libtasn1/manual/libtasn1.html. Perhaps I
>> should be using a different set of docs?
>
> You've found a bug in the C->Texinfo converter.  I'll fix it (or change
> the function document to match the syntax that the converter expects)
> once savannah is back up again.
Ooops. I wasn't looking this time :( Those critters can't hide from me.

> Btw, meanwhile you can also use the GTK-DOC manual:
>
> http://www.gnu.org/software/libtasn1/reference/libtasn1-libtasn1.html
OK. Thanks.

> The content for both is built from the same source code, but the
> presentation is different.  Some people prefer one, some the other...
I still uses man pages - its what I learned nearly 20 years ago as an
undergrad. Dinosaur.

Jeff