blob: introduce blob_parse_untrusted

blob: introduce blob_parse_untrusted

blob_parse can be only used on trusted input as it has no possibility to
check the length of the provided input buffer, which might lead to
undefined behaviour and/or crashes when supplied with malformed,
corrupted or otherwise specially crafted input.

So this introduces blob_parse_untrusted variant which expects additional
input buffer length argument and thus should be able to process also
inputs from untrusted sources.

Signed-off-by: Petr Štetiar <ynezz@true.cz>