mbedtls/ChangeLog.d/mpi_read_negative_zero.txt

Bugfix
   * Fix some cases in the bignum module where the library constructed an
     unintended representation of the value 0 which was not processed
     correctly by some bignum operations. This could happen when
     mbedtls_mpi_read_string() was called on "-0", or when
     mbedtls_mpi_mul_mpi() and mbedtls_mpi_mul_int() was called with one of
     the arguments being negative and the other being 0. Fixes #4643.
mbedtls_mpi_read_string("-0") no longer produces a "negative zero" Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com> 2021-04-09 15:11:34 +00:00			`Bugfix`
Fix multiplication producing a negative zero Fix mbedtls_mpi_mul_mpi() when one of the operands is zero and the other is negative. The sign of the result must be 1, since some library functions do not treat {-1, 0, NULL} or {-1, n, {0}} as representing the value 0. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com> 2021-06-10 13:51:54 +00:00			`* Fix some cases in the bignum module where the library constructed an`
			`unintended representation of the value 0 which was not processed`
			`correctly by some bignum operations. This could happen when`
			`mbedtls_mpi_read_string() was called on "-0", or when`
			`mbedtls_mpi_mul_mpi() and mbedtls_mpi_mul_int() was called with one of`
			`the arguments being negative and the other being 0. Fixes #4643.`