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Merge pull request #6618 from gilles-peskine-arm/mpi_sint-min-ub-2.28

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Backport 2.28: Fix undefined behavior in bignum: NULL+0 and -most-negative-sint
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Gilles Peskine
2022-11-21 19:52:03 +01:00
committed by GitHub
parent e530b5b4c4 ae7cbd7576
commit b358e46c8e
6 changed files with 190 additions and 5 deletions
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14
include/mbedtls/bignum.h
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@@ -182,6 +182,20 @@
#endif /* !MBEDTLS_NO_UDBL_DIVISION */
#endif /* !MBEDTLS_HAVE_INT64 */
/** \typedef mbedtls_mpi_uint
* \brief The type of machine digits in a bignum, called _limbs_.
*
* This is always an unsigned integer type with no padding bits. The size
* is platform-dependent.
*/
/** \typedef mbedtls_mpi_sint
* \brief The signed type corresponding to #mbedtls_mpi_uint.
*
* This is always an signed integer type with no padding bits. The size
* is platform-dependent.
*/
#ifdef __cplusplus
extern "C" {
#endif