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Revert "lib/mpi: Extend the MPI library"

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This partially reverts commit a8ea8bdd9d.

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>
This commit is contained in:
Herbert Xu
2024-08-10 14:20:55 +08:00
parent f235bc11cc
commit fca5cb4dd2
12 changed files with 10 additions and 1165 deletions
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29
lib/crypto/mpi/mpi-div.c
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@@ -15,7 +15,6 @@
#include "longlong.h"
void mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den);
void mpi_fdiv_qr(MPI quot, MPI rem, MPI dividend, MPI divisor);
void mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor)
{
@@ -40,34 +39,6 @@ void mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor)
mpi_free(temp_divisor);
}
void mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor)
{
MPI tmp = mpi_alloc(mpi_get_nlimbs(quot));
mpi_fdiv_qr(quot, tmp, dividend, divisor);
mpi_free(tmp);
}
void mpi_fdiv_qr(MPI quot, MPI rem, MPI dividend, MPI divisor)
{
int divisor_sign = divisor->sign;
MPI temp_divisor = NULL;
if (quot == divisor || rem == divisor) {
temp_divisor = mpi_copy(divisor);
divisor = temp_divisor;
}
mpi_tdiv_qr(quot, rem, dividend, divisor);
if ((divisor_sign ^ dividend->sign) && rem->nlimbs) {
mpi_sub_ui(quot, quot, 1);
mpi_add(rem, rem, divisor);
}
if (temp_divisor)
mpi_free(temp_divisor);
}
/* If den == quot, den needs temporary storage.
* If den == rem, den needs temporary storage.
* If num == quot, num needs temporary storage.