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This commit is contained in:
Werner Koch 2004-03-29 13:56:57 +00:00
parent fcbd25c5ad
commit 42ac422ba0
9 changed files with 99 additions and 34 deletions
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15
mpi/mpi-pow.c
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@ -39,7 +39,7 @@
* RES = BASE ^ EXP mod MOD
*/
void
mpi_powm( MPI res, MPI base, MPI exp, MPI mod)
mpi_powm( MPI res, MPI base, MPI exponent, MPI mod)
{
mpi_ptr_t rp, ep, mp, bp;
mpi_size_t esize, msize, bsize, rsize;
@ -55,19 +55,19 @@ mpi_powm( MPI res, MPI base, MPI exp, MPI mod)
mpi_size_t tsize=0; /* to avoid compiler warning */
/* fixme: we should check that the warning is void*/
esize = exp->nlimbs;
esize = exponent->nlimbs;
msize = mod->nlimbs;
size = 2 * msize;
esign = exp->sign;
esign = exponent->sign;
msign = mod->sign;
esec = mpi_is_secure(exp);
esec = mpi_is_secure(exponent);
msec = mpi_is_secure(mod);
bsec = mpi_is_secure(base);
rsec = mpi_is_secure(res);
rp = res->d;
ep = exp->d;
ep = exponent->d;
if( !msize )
msize = 1 / msize; /* provoke a signal */
@ -129,7 +129,7 @@ mpi_powm( MPI res, MPI base, MPI exp, MPI mod)
rp = res->d;
}
}
else { /* Make BASE, EXP and MOD not overlap with RES. */
else { /* Make BASE, EXPONENT and MOD not overlap with RES. */
if( rp == bp ) {
/* RES and BASE are identical. Allocate temp. space for BASE. */
assert( !bp_marker );
@ -137,7 +137,8 @@ mpi_powm( MPI res, MPI base, MPI exp, MPI mod)
MPN_COPY(bp, rp, bsize);
}
if( rp == ep ) {
/* RES and EXP are identical. Allocate temp. space for EXP. */
/* RES and EXPONENT are identical.
Allocate temp. space for EXPONENT. */
ep = ep_marker = mpi_alloc_limb_space( esize, esec );
MPN_COPY(ep, rp, esize);
}