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Verify created signatures.

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This commit is contained in:
Werner Koch 2001-03-24 16:29:31 +00:00
parent f3b2ef0b93
commit 3b866e74a8
11 changed files with 73 additions and 8 deletions
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5
mpi/ChangeLog
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@ -1,3 +1,8 @@
2001-03-24 Werner Koch <wk@gnupg.org>
* mpi-mul.c (mpi_mul): Make sure that secret temporary results are
not stored in w. Suggested by Florian Weimer.
2001-03-18 Werner Koch <wk@gnupg.org>
* config.links (mpi_sflags): Use i386 code for i386. According to

21
mpi/mpi-mul.c
View file

@ -120,6 +120,7 @@ mpi_mul( MPI w, MPI u, MPI v)
int assign_wp=0;
mpi_ptr_t tmp_limb=NULL;
if( u->nlimbs < v->nlimbs ) { /* Swap U and V. */
usize = v->nlimbs;
usign = v->sign;
@ -145,7 +146,15 @@ mpi_mul( MPI w, MPI u, MPI v)
/* Ensure W has space enough to store the result. */
wsize = usize + vsize;
if( w->alloced < wsize ) {
if ( !mpi_is_secure (w) && (mpi_is_secure (u) || mpi_is_secure (v)) ) {
/* w is not allocated in secure space but u or v is. To make sure
* that no temporray results are stored in w, we temporary use
* a newly allocated limb space for w */
wp = mpi_alloc_limb_space( wsize, 1 );
assign_wp = 2; /* mark it as 2 so that we can later copy it back to
* mormal memory */
}
else if( w->alloced < wsize ) {
if( wp == up || wp == vp ) {
wp = mpi_alloc_limb_space( wsize, mpi_is_secure(w) );
assign_wp = 1;
@ -180,8 +189,16 @@ mpi_mul( MPI w, MPI u, MPI v)
wsize -= cy? 0:1;
}
if( assign_wp )
if( assign_wp ) {
if (assign_wp == 2) {
/* copy the temp wp from secure memory back to normal memory */
mpi_ptr_t tmp_wp = mpi_alloc_limb_space (wsize, 0);
MPN_COPY (tmp_wp, wp, wsize);
mpi_free_limb_space (wp);
wp = tmp_wp;
}
mpi_assign_limb_space( w, wp, wsize );
}
w->nlimbs = wsize;
w->sign = sign_product;
if( tmp_limb )