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Don't test mbedtls_mpi_core_lt_ct with 0 limbs

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A core MPI must have at least 1 limb. We can no longer test with 0 limbs,
and we don't need to anyway, so don't try.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2022-11-09 11:18:38 +01:00
parent 0b7e07904e
commit 95b5addcd6
2 changed files with 1 additions and 3 deletions
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1
library/constant_time_internal.h
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@ -138,6 +138,7 @@ unsigned mbedtls_ct_mpi_uint_lt( const mbedtls_mpi_uint x,
* \param B The right-hand MPI. This must point to an array of limbs
* with the same allocated length as \p A.
* \param limbs The number of limbs in \p A and \p B.
* This must not be 0.
*
* \return The result of the comparison:
* \c 1 if \p A is less than \p B.

3
tests/suites/test_suite_bignum_core.misc.data
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@ -167,9 +167,6 @@ mpi_core_lt_ct:"2B5":"2B4":0
mbedtls_mpi_core_lt_ct: x<y (1 limb)
mpi_core_lt_ct:"2B5":"2B6":1
mbedtls_mpi_core_lt_ct: x=y (0 limbs)
mpi_core_lt_ct:"":"":0
mbedtls_mpi_core_lt_ct: x>y (63 bit x, y first byte greater)
mpi_core_lt_ct:"7FFFFFFFFFFFFFFF":"00000000000000FF":0