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Generalize representation handling in mbedtls_mpi_mod_read

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Call mbedtls_mpi_mod_raw_canonical_to_modulus_rep instead of assuming that
anything that isn't MBEDTLS_MPI_MOD_REP_MONTGOMERY is canonical.

mbedtls_mpi_mod_write should get the same treatment, but I'm holding off
until https://github.com/Mbed-TLS/mbedtls/issues/6679 is done.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2022-12-20 19:24:27 +01:00
parent eb2e77f617
commit e655479528
1 changed files with 1 additions and 2 deletions
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3
library/bignum_mod.c
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@ -248,8 +248,7 @@ int mbedtls_mpi_mod_read( mbedtls_mpi_mod_residue *r,
r->limbs = m->limbs;
if( m->int_rep == MBEDTLS_MPI_MOD_REP_MONTGOMERY )
ret = mbedtls_mpi_mod_raw_to_mont_rep( r->p, m );
ret = mbedtls_mpi_mod_raw_canonical_to_modulus_rep( r->p, m );
cleanup:
return ( ret );