diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2024-08-10 14:20:55 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-08-17 13:55:50 +0800 |
| commit | fca5cb4dd2b4a9423cb6d112cc71c33899955a1f (patch) | |
| tree | 5a606087e1388459d2947bba377687e5cc1a3a0d /lib/crypto/mpi/mpi-add.c | |
| parent | f235bc11cc95fcd5847e8249d4c1c9ae5979701c (diff) | |
| download | lwn-fca5cb4dd2b4a9423cb6d112cc71c33899955a1f.tar.gz lwn-fca5cb4dd2b4a9423cb6d112cc71c33899955a1f.zip | |
Revert "lib/mpi: Extend the MPI library"
This partially reverts commit a8ea8bdd9df92a0e5db5b43900abb7a288b8a53e.
Most of it is no longer needed since sm2 has been removed. However,
the following functions have been kept as they have developed other
uses:
mpi_copy
mpi_mod
mpi_test_bit
mpi_set_bit
mpi_rshift
mpi_add
mpi_sub
mpi_addm
mpi_subm
mpi_mul
mpi_mulm
mpi_tdiv_r
mpi_fdiv_r
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'lib/crypto/mpi/mpi-add.c')
| -rw-r--r-- | lib/crypto/mpi/mpi-add.c | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/lib/crypto/mpi/mpi-add.c b/lib/crypto/mpi/mpi-add.c index 9056fc5167fc..b47c8c35f5fe 100644 --- a/lib/crypto/mpi/mpi-add.c +++ b/lib/crypto/mpi/mpi-add.c @@ -13,57 +13,6 @@ #include "mpi-internal.h" -/**************** - * Add the unsigned integer V to the mpi-integer U and store the - * result in W. U and V may be the same. - */ -void mpi_add_ui(MPI w, MPI u, unsigned long v) -{ - mpi_ptr_t wp, up; - mpi_size_t usize, wsize; - int usign, wsign; - - usize = u->nlimbs; - usign = u->sign; - wsign = 0; - - /* If not space for W (and possible carry), increase space. */ - wsize = usize + 1; - if (w->alloced < wsize) - mpi_resize(w, wsize); - - /* These must be after realloc (U may be the same as W). */ - up = u->d; - wp = w->d; - - if (!usize) { /* simple */ - wp[0] = v; - wsize = v ? 1:0; - } else if (!usign) { /* mpi is not negative */ - mpi_limb_t cy; - cy = mpihelp_add_1(wp, up, usize, v); - wp[usize] = cy; - wsize = usize + cy; - } else { - /* The signs are different. Need exact comparison to determine - * which operand to subtract from which. - */ - if (usize == 1 && up[0] < v) { - wp[0] = v - up[0]; - wsize = 1; - } else { - mpihelp_sub_1(wp, up, usize, v); - /* Size can decrease with at most one limb. */ - wsize = usize - (wp[usize-1] == 0); - wsign = 1; - } - } - - w->nlimbs = wsize; - w->sign = wsign; -} - - void mpi_add(MPI w, MPI u, MPI v) { mpi_ptr_t wp, up, vp; |