[WIP] Bump rand_core to v0.10; MSRV 1.85

NOTE: depends on zkcrypto/ff#149 and forthcoming releases of `rand` and
`rand_xorshift`

Release notes:

https://github.com/rust-random/rand_core/releases/tag/v0.10.0

Author: tarcieri

Cargo.lock

@@ -6,7 +6,7 @@ authors = [
     "Jack Grigg <jack@z.cash>",
 ]
 edition = "2021"
-rust-version = "1.63"
+rust-version = "1.85"
 readme = "README.md"
 license = "MIT/Apache-2.0"
 
@@ -17,9 +17,9 @@ repository = "https://github.com/zkcrypto/group"
 
 [dependencies]
 ff = { version = "=0.14.0-pre.0", default-features = false }
-rand = { version = "0.9", optional = true, default-features = false }
-rand_core = { version = "0.9", default-features = false }
-rand_xorshift = { version = "0.4", optional = true }
+rand = { version = "0.10.0-rc.8", optional = true, default-features = false }
+rand_core = { version = "0.10", default-features = false }
+rand_xorshift = { version = "0.5.0-rc.0", optional = true }
 subtle = { version = "2.2.1", default-features = false }
 
 # Crate for exposing the dynamic memory usage of the w-NAF structs.
@@ -33,3 +33,8 @@ wnaf-memuse = ["alloc", "memuse"]
 
 [badges]
 maintenance = { status = "actively-developed" }
+
+[patch.crates-io]
+ff = { git = "https://github.com/tarcieri/ff", branch = "rand_core/v0.10" }
+rand = { git = "https://github.com/rust-random/rand" }
+rand_xorshift = { git = "https://github.com/rust-random/rngs" }

Cargo.toml

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.63.0"
+channel = "1.85.0"
 components = [ "clippy", "rustfmt" ]

rust-toolchain.toml

@@ -14,7 +14,7 @@ use core::fmt;
 use core::iter::Sum;
 use core::ops::{Add, AddAssign, Mul, MulAssign, Neg, Sub, SubAssign};
 use ff::PrimeField;
-use rand_core::{RngCore, TryRngCore};
+use rand_core::{Rng, TryRng};
 use subtle::{Choice, CtOption};
 
 pub mod cofactor;
@@ -77,7 +77,7 @@ pub trait Group:
     /// this group.
     ///
     /// This function is non-deterministic, and samples from the user-provided RNG.
-    fn random<R: RngCore + ?Sized>(rng: &mut R) -> Self {
+    fn random<R: Rng + ?Sized>(rng: &mut R) -> Self {
         Self::try_from_rng(rng)
             .map_err(|e: Infallible| e)
             .expect("Infallible failed")
@@ -92,7 +92,7 @@ pub trait Group:
     /// this group.
     ///
     /// This function is non-deterministic, and samples from the user-provided RNG.
-    fn try_from_rng<R: TryRngCore + ?Sized>(rng: &mut R) -> Result<Self, R::Error>;
+    fn try_from_rng<R: TryRng + ?Sized>(rng: &mut R) -> Result<Self, R::Error>;
 
     /// Returns the additive identity, also known as the "neutral element".
     fn identity() -> Self;