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Merge pull request #9281 from mpg/rsapub

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[3.6] Reduce performance regression in RSA public operations
This commit is contained in:
Gilles Peskine
2024-08-22 16:50:38 +00:00
committed by GitHub
parent 273d07b0c0 4c857c49b4
commit df0ef8a624
9 changed files with 338 additions and 27 deletions
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1
tests/suites/test_suite_bignum.function
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@ -3,6 +3,7 @@
#include "mbedtls/entropy.h"
#include "constant_time_internal.h"
#include "bignum_core.h"
#include "bignum_internal.h"
#include "test/constant_flow.h"
#if MBEDTLS_MPI_MAX_BITS > 792

42
tests/suites/test_suite_bignum_core.function
View File

@ -1178,6 +1178,7 @@ void mpi_core_exp_mod(char *input_N, char *input_A,
char *input_E, char *input_X)
{
mbedtls_mpi_uint *A = NULL;
mbedtls_mpi_uint *A_copy = NULL;
mbedtls_mpi_uint *E = NULL;
mbedtls_mpi_uint *N = NULL;
mbedtls_mpi_uint *X = NULL;
@ -1229,19 +1230,56 @@ void mpi_core_exp_mod(char *input_N, char *input_A,
TEST_CALLOC(T, working_limbs);
mbedtls_mpi_core_exp_mod(Y, A, N, N_limbs, E, E_limbs, R2, T);
/* Test the safe variant */
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
mbedtls_mpi_optionally_safe_codepath_reset();
#endif
mbedtls_mpi_core_exp_mod(Y, A, N, N_limbs, E, E_limbs, R2, T);
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
TEST_EQUAL(mbedtls_mpi_optionally_safe_codepath, MBEDTLS_MPI_IS_SECRET);
#endif
TEST_EQUAL(0, memcmp(X, Y, N_limbs * sizeof(mbedtls_mpi_uint)));
/* Check when output aliased to input */
/* Test the unsafe variant */
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
mbedtls_mpi_optionally_safe_codepath_reset();
#endif
mbedtls_mpi_core_exp_mod_unsafe(Y, A, N, N_limbs, E, E_limbs, R2, T);
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
TEST_EQUAL(mbedtls_mpi_optionally_safe_codepath, MBEDTLS_MPI_IS_PUBLIC);
#endif
TEST_EQUAL(0, memcmp(X, Y, N_limbs * sizeof(mbedtls_mpi_uint)));
/* Check both with output aliased to input */
TEST_CALLOC(A_copy, A_limbs);
memcpy(A_copy, A, sizeof(*A_copy) * A_limbs);
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
mbedtls_mpi_optionally_safe_codepath_reset();
#endif
mbedtls_mpi_core_exp_mod(A, A, N, N_limbs, E, E_limbs, R2, T);
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
TEST_EQUAL(mbedtls_mpi_optionally_safe_codepath, MBEDTLS_MPI_IS_SECRET);
#endif
TEST_EQUAL(0, memcmp(X, A, N_limbs * sizeof(mbedtls_mpi_uint)));
memcpy(A, A_copy, sizeof(*A) * A_limbs);
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
mbedtls_mpi_optionally_safe_codepath_reset();
#endif
mbedtls_mpi_core_exp_mod_unsafe(A, A, N, N_limbs, E, E_limbs, R2, T);
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
TEST_EQUAL(mbedtls_mpi_optionally_safe_codepath, MBEDTLS_MPI_IS_PUBLIC);
#endif
TEST_EQUAL(0, memcmp(X, A, N_limbs * sizeof(mbedtls_mpi_uint)));
exit:
mbedtls_free(T);
mbedtls_free(A);
mbedtls_free(A_copy);
mbedtls_free(E);
mbedtls_free(N);
mbedtls_free(X);