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Change E closer to where it's used

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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
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Gilles Peskine
2022-11-16 19:52:30 +01:00
committed by Janos Follath
parent 07f2c69511
commit 7af166b827
1 changed files with 3 additions and 1 deletions
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4
library/bignum_core.c
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@@ -616,7 +616,6 @@ int mbedtls_mpi_core_exp_mod( mbedtls_mpi_uint *X,
mbedtls_mpi_uint one = 1, mm;
mm = mbedtls_mpi_core_montmul_init( N ); /* Compute Montgomery constant */
E += E_limbs; /* Skip to end of exponent buffer */
wsize = exp_mod_get_window_size( E_limbs * biL );
welem = ( (size_t) 1 ) << wsize;
@@ -664,6 +663,9 @@ int mbedtls_mpi_core_exp_mod( mbedtls_mpi_uint *X,
/* X = 1 (in Montgomery presentation) initially */
memcpy( X, Wtable, AN_limbs * ciL );
/* Start from the end of exponent buffer */
E += E_limbs;
size_t limb_bits_remaining = 0;
mbedtls_mpi_uint cur_limb, window = 0;
size_t window_bits = 0;