A possible bug for revealing signed values.

[fionser]

The revealing function in this line seems not right for converting unsigned value to singed value for Ring with less than 64 bit.

[drunkenlegend]

Checked it, its correct because to get the signed value, you call getSignedValue after calling reconstruct. Reconstruct is not supposed to return values in 64 bit, but in the bitlength specified.

[fionser]

But this function returns a signedInt which seems weird if we need extra getSingedValue to convert it to signed values.