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| author | Tianjia Zhang <tianjia.zhang@linux.alibaba.com> | 2020-09-21 00:20:55 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-09-25 17:48:53 +1000 |
| commit | a8ea8bdd9df92a0e5db5b43900abb7a288b8a53e (patch) | |
| tree | e2fcfdc11478594b102a5e0fa77d220903fc159b /lib/mpi/mpih-mul.c | |
| parent | f49282870fb039e3c2e5c3341bd27875282609d7 (diff) | |
| download | linux-a8ea8bdd9df92a0e5db5b43900abb7a288b8a53e.tar.bz2 | |
lib/mpi: Extend the MPI library
Expand the mpi library based on libgcrypt, and the ECC algorithm of
mpi based on libgcrypt requires these functions.
Some other algorithms will be developed based on mpi ecc, such as SM2.
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Tested-by: Xufeng Zhang <yunbo.xufeng@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'lib/mpi/mpih-mul.c')
| -rw-r--r-- | lib/mpi/mpih-mul.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/mpi/mpih-mul.c b/lib/mpi/mpih-mul.c index a93647564054..e5f1c84e3c48 100644 --- a/lib/mpi/mpih-mul.c +++ b/lib/mpi/mpih-mul.c @@ -317,6 +317,31 @@ mpih_sqr_n(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size, mpi_ptr_t tspace) } } + +void mpihelp_mul_n(mpi_ptr_t prodp, + mpi_ptr_t up, mpi_ptr_t vp, mpi_size_t size) +{ + if (up == vp) { + if (size < KARATSUBA_THRESHOLD) + mpih_sqr_n_basecase(prodp, up, size); + else { + mpi_ptr_t tspace; + tspace = mpi_alloc_limb_space(2 * size); + mpih_sqr_n(prodp, up, size, tspace); + mpi_free_limb_space(tspace); + } + } else { + if (size < KARATSUBA_THRESHOLD) + mul_n_basecase(prodp, up, vp, size); + else { + mpi_ptr_t tspace; + tspace = mpi_alloc_limb_space(2 * size); + mul_n(prodp, up, vp, size, tspace); + mpi_free_limb_space(tspace); + } + } +} + int mpihelp_mul_karatsuba_case(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t usize, |