srp: store group G constant in ConstMontyForm
#250
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Uses `crypto-bigint`'s stack-allocated Montgomery form types to define group constants, including adding an impl of `ConstMontyParams` to them. This precomputes all of their Montgomery form constants at compile-time, meaning initializing a `BoxedMontyForm` (for now, since it's the only thing that currently has modpow) can use the precomputed constants. This is also the first step towards supporting a fully stack allocated implementation (#248).
tarcieri
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Uses
crypto-bigint's stack-allocated Montgomery form types to define group constants, including adding an impl ofConstMontyParamsto them.This precomputes all of their Montgomery form constants at compile-time, meaning initializing a
BoxedMontyForm(for now, since it's the only thing that currently has modpow) can use the precomputed constants.This is also the first step towards supporting a fully stack allocated implementation (#248).