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New test helper mbedtls_test_read_mpi

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This test helper reads an MPI from a string and guarantees control over the
number of limbs of the MPI, allowing test cases to construct values with or
without leading zeros, including 0 with 0 limbs.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2021-06-11 14:13:53 +02:00
parent aa9d9ac598
commit bbc4b8d2be
1 changed files with 19 additions and 0 deletions
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19
tests/suites/helpers.function
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@@ -46,6 +46,10 @@ typedef UINT32 uint32_t;
#include <strings.h>
#endif
#if defined(MBEDTLS_BIGNUM_C)
#include "mbedtls/bignum.h"
#endif
#if defined(MBEDTLS_THREADING_C) && defined(MBEDTLS_THREADING_PTHREAD) && \
defined(MBEDTLS_TEST_HOOKS)
#include "mbedtls/threading.h"
@@ -847,6 +851,21 @@ int mbedtls_test_hexcmp( uint8_t * a, uint8_t * b, uint32_t a_len, uint32_t b_le
return ret;
}
#if defined(MBEDTLS_BIGNUM_C)
int mbedtls_test_read_mpi( mbedtls_mpi *X, int radix, const char *s )
{
/* mbedtls_mpi_read_string() currently retains leading zeros.
* It always allocates at least one limb for the value 0. */
if( s[0] == 0 )
{
mbedtls_mpi_free( X );
return( 0 );
}
else
return( mbedtls_mpi_read_string( X, radix, s ) );
}
#endif /* MBEDTLS_BIGNUM_C */
#if defined(MBEDTLS_TEST_MUTEX_USAGE)
/** Mutex usage verification framework.
*