Crate unknown_order[][src]

Expand description

This crate handles groups of unknown order.

I’ve seen this commonly across multiple projects where they need a multiprecision library and use one of three libraries: Gnu MP BigNum Library, OpenSSL’s BigNum Library and Rust’s BigInt Library, depending on the needs and requirements (licensing, performance, platform target).

This library wraps them all into a common API, so they can be used interchangeably.

Groups of unknown order require using a modulus that is the composite of two big prime numbers. This library is designed to facilitate these use cases such as RSA, Paillier, Hyperelliptic Curves, Accumulators, CL signatures.

The modulus is not known at compile time which excludes using certain traits like ff::PrimeField, so unfortunately, the caller needs to remember to use methods prefixed with mod to achieve the desired results.



Big number


GcdResult encapsulates the gcd result and the Bézout coefficients


Represents a cyclic group where all operations are reduced by a modulus. Purely a convenience struct to avoid having to call mod{ops}