In mbedtls_mpi_add_mpi() and mbedtls_mpi_sub_mpi(), and by extention
mbedtls_mpi_add_int() and mbedtls_mpi_sub_int(), when the resulting value
was zero, the sign bit of the result was incorrectly set to -1 when the
left-hand operand was negative. This is not a valid mbedtls_mpi
representation. Fix this: always set the sign to +1 when the result is 0.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This exposes a bug in mbedtls_mpi_add_mpi() and mbedtls_mpi_sub_mpi() which
will be fixed in a subsequent commit.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
mbedtls_mpi_add_mpi() and mbedtls_mpi_sub_mpi() have the same logic, just
with one bit to flip in the sign calculation. Move the shared logic to a new
auxiliary function. This slightly reduces the code size (if the compiler
doesn't inline) and reduces the maintenance burden.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
In development, mbedtls/version.h is getting included indirectly
in via mbedtls/build_info.h, but this doesn't happen in 2.28.
This commit add this dependency in ssl_test_lib.h
Signed-off-by: Yanray Wang <yanray.wang@arm.com>
Although our build scripts support that, it's annoying, because it makes
"test_suite_XXX" ambiguous between "all the data for
test_suite_XXX.function" and "just test_suite_XXX.data".
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
It just got renamed, and it's also not the most canonical example since it's
a somewhat deprecated interface in the development branch. Make a different
module the example.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Align the name of the bignum test suite with the source module (which was
renamed from mpi.c to bignum.c in the PolarSSL 1.x days). This also brings
it into line with the test suites for the low-level bignum interfaces.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Looking for executables causes problems with leftover compiled test
suites from other branches when we forget to run make clean before
switching branches. Using the .data files is more robust as most of them
are tracked, so will be removed when switching branches.
Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
For the benefit of auto-formatting tools, move from the '$placeholder'
templating syntax to a new syntax of the form:
__MBEDTLS_TEST_TEMPLATE__PLACEHOLDER
This change allows the test code template to be almost entirely valid C.
Signed-off-by: David Horstmann <david.horstmann@arm.com>
component_build_psa_accel_alg_ecdsa is subsumed by
component_test_psa_crypto_config_accel_ecdsa, which has the same
configuration and additionally runs the unit tests.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
The bit length of m is leaked through through timing in ecp_mul_mxz().
Initially found by Manuel Pégourié-Gonnard on ecp_mul_edxyz(), which has
been inspired from ecp_mul_mxz(), during initial review of the EdDSA PR.
See: https://github.com/Mbed-TLS/mbedtls/pull/3245#discussion_r490827996
Fix that by using grp->nbits + 1 instead, which anyway is very close to
the length of m, which means there is no significant performance impact.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
