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bignum_mod: Added static standard_modulus_setup().

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Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
This commit is contained in:
Minos Galanakis 2023-05-09 15:44:46 +01:00
parent 88e16dfa2a
commit f055ad61dc
1 changed files with 13 additions and 8 deletions
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21
library/bignum_mod.c
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@ -136,15 +136,23 @@ cleanup:
return ret; return ret;
} }
static inline void standard_modulus_setup(mbedtls_mpi_mod_modulus *N,
const mbedtls_mpi_uint *p,
size_t p_limbs,
mbedtls_mpi_mod_rep_selector int_rep)
{
N->p = p;
N->limbs = p_limbs;
N->bits = mbedtls_mpi_core_bitlen(p, p_limbs);
N->int_rep = int_rep;
}
int mbedtls_mpi_mod_modulus_setup(mbedtls_mpi_mod_modulus *N, int mbedtls_mpi_mod_modulus_setup(mbedtls_mpi_mod_modulus *N,
const mbedtls_mpi_uint *p, const mbedtls_mpi_uint *p,
size_t p_limbs) size_t p_limbs)
{ {
int ret = 0; int ret = 0;
N->p = p; standard_modulus_setup(N, p, p_limbs, MBEDTLS_MPI_MOD_REP_MONTGOMERY);
N->limbs = p_limbs;
N->bits = mbedtls_mpi_core_bitlen(p, p_limbs);
N->int_rep = MBEDTLS_MPI_MOD_REP_MONTGOMERY;
N->rep.mont.mm = mbedtls_mpi_core_montmul_init(N->p); N->rep.mont.mm = mbedtls_mpi_core_montmul_init(N->p);
ret = set_mont_const_square(&N->rep.mont.rr, N->p, N->limbs); ret = set_mont_const_square(&N->rep.mont.rr, N->p, N->limbs);
@ -160,10 +168,7 @@ int mbedtls_mpi_mod_optred_modulus_setup(mbedtls_mpi_mod_modulus *N,
size_t p_limbs, size_t p_limbs,
mbedtls_mpi_opt_red_struct *ored) mbedtls_mpi_opt_red_struct *ored)
{ {
N->p = p; standard_modulus_setup(N, p, p_limbs, MBEDTLS_MPI_MOD_REP_OPT_RED);
N->limbs = p_limbs;
N->bits = mbedtls_mpi_core_bitlen(p, p_limbs);
N->int_rep = MBEDTLS_MPI_MOD_REP_OPT_RED;
N->rep.ored =ored ; N->rep.ored =ored ;
return 0; return 0;
} }