Konstantin Kondrashov 5421f5e9ae mbedtls: Fix Z->s in mbedtls_mpi_exp_mod() ...

Z->s should never be zero, only 1 or -1.
Added additional checks for X, Y and M args to correctly set Z->s.

Closes: https://github.com/espressif/esp-idf/issues/1681
Closes: https://github.com/espressif/esp-idf/issues/3603
Closes: IDFGH-1313

2019-06-26 19:33:47 +08:00

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