Provide Group::try_from_rng

Author: baloo

Cargo.lock

@@ -32,4 +32,4 @@ ff = { git = "https://github.com/zkcrypto/ff.git", branch = "release-0.14.0" }
 
 # https://github.com/zkcrypto/group/pull/56
 # https://github.com/zkcrypto/group/pull/57
-group = { git = "https://github.com/baloo/group.git", branch = "baloo/relax-rng" }
+group = { git = "https://github.com/baloo/group.git", branch = "baloo/try_from_rng" }

Cargo.toml

@@ -10,7 +10,7 @@ use crate::{
     error::{Error, Result},
     ops::{Invert, LinearCombination, MulByGenerator, Reduce, ShrAssign},
     point::AffineCoordinates,
-    rand_core::{RngCore, TryRngCore},
+    rand_core::TryRngCore,
     scalar::{FromUintUnchecked, IsHigh},
     sec1::{CompressedPoint, FromEncodedPoint, ToEncodedPoint},
     subtle::{Choice, ConditionallySelectable, ConstantTimeEq, CtOption},
@@ -575,7 +575,7 @@ impl ToEncodedPoint<MockCurve> for ProjectivePoint {
 impl group::Group for ProjectivePoint {
     type Scalar = Scalar;
 
-    fn random<R: RngCore + ?Sized>(_rng: &mut R) -> Self {
+    fn try_from_rng<R: TryRngCore + ?Sized>(_rng: &mut R) -> core::result::Result<Self, R::Error> {
         unimplemented!();
     }