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binum_mod: Added mbedtls_mpi_mod_optred_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 10:37:21 +01:00
parent 680233dc3f
commit bbe9db4b29
2 changed files with 30 additions and 0 deletions
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13
library/bignum_mod.c
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@ -171,6 +171,19 @@ exit:
return ret;
}
int mbedtls_mpi_mod_optred_modulus_setup(mbedtls_mpi_mod_modulus *N,
const mbedtls_mpi_uint *p,
size_t p_limbs,
mbedtls_mpi_opt_red_struct *ored)
{
N->p = p;
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 ;
return 0;
}
int mbedtls_mpi_mod_mul(mbedtls_mpi_mod_residue *X,
const mbedtls_mpi_mod_residue *A,
const mbedtls_mpi_mod_residue *B,

17
library/bignum_mod.h
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@ -208,6 +208,23 @@ int mbedtls_mpi_mod_modulus_setup(mbedtls_mpi_mod_modulus *N,
size_t p_limbs,
mbedtls_mpi_mod_rep_selector int_rep);
/** Setup an optimised-reduction compatible modulus structure.
*
* \param[out] N The address of the modulus structure to populate.
* \param[in] p The address of the limb array storing the value of \p N.
* The memory pointed to by \p p will be used by \p N and must
* not be modified in any way until after
* mbedtls_mpi_mod_modulus_free() is called.
* \param p_limbs The number of limbs of \p p.
* \param ored The optimized reduction structure to use. \p p.
*
* \return \c 0 if successful.
*/
int mbedtls_mpi_mod_optred_modulus_setup(mbedtls_mpi_mod_modulus *N,
const mbedtls_mpi_uint *p,
size_t p_limbs,
mbedtls_mpi_opt_red_struct *ored);
/** Free elements of a modulus structure.
*
* This function frees any memory allocated by mbedtls_mpi_mod_modulus_setup().