Hi!
> > > Due to RSA_I2OSP is not only used by signature verification path but also used
> > > in signature generation path. So, separate the length checking of octet string
> > > because it's not for generate 0x00 0x01 leading string when used in signature
> > > generation.
> > >
> > > Reviewed-by: Jiri Kosina <jkosina@xxxxxxx>
> > > Signed-off-by: Lee, Chun-Yi <jlee@xxxxxxxx>
> >
> > > +static int RSA_I2OSP(MPI x, size_t xLen, u8 **_X)
> > > +{
> > > + unsigned x_size;
> > > + unsigned X_size;
> > > + u8 *X = NULL;
> >
> > Is this kernel code or entry into obfuscated C code contest? This is not funny.
> >
> The small "x" is the input integer that will transfer to big "X" that is
> a octet sting.
>
> Sorry for I direct give variable name to match with spec, maybe I need
> use big_X or....
Having variables that differ only in case is confusing. Actually
RSA_I2OSP is not a good name for function, either.
If it converts x into X, perhaps you can name one input and second output?
> Do you have good suggest for the naming?
Not really, sorry.
Pavel
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