elliptic-curve: add NonZeroScalar::invert_vartime
#1207
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Adds support for variable-time inversions of `NonZeroScalar`, which allows the inversion to be infallible. An example use case is ECDSA verification, where the `s` component of the signature needs to be inverted.
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Adds support for variable-time inversions of
NonZeroScalar, which allows the inversion to be infallible.An example use case is ECDSA verification, where the
scomponent of the signature needs to be inverted.