Replaces rand_core::OsRng with rand::thread_rng()

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "schnorrkel"
-version = "0.11.0"
+version = "0.11.1"
 authors = ["Jeff Burdges <[email protected]>"]
 readme = "README.md"
 license = "BSD-3-Clause"
@@ -21,6 +21,7 @@ curve25519-dalek = { version = "4.1.0", default-features = false, features = ["d
 subtle = { version = "2.5.0", default-features = false }
 merlin = { version = "3.0.0", default-features = false }
 rand_core = { version = "0.6.2", default-features = false }
+rand = { version = "0.8.5", default-features = false, features = ["std_rng"], optional = true }
 serde_crate = { version = "1.0.130", package = "serde", default-features = false, optional = true }
 serde_bytes = { version = "0.11.5", default-features = false, optional = true }
 cfg-if = { version = "1.0.0", optional = true }
@@ -46,12 +47,12 @@ default = ["std", "getrandom"]
 preaudit_deprecated = []
 nightly = []
 alloc = ["curve25519-dalek/alloc", "rand_core/alloc", "serde_bytes/alloc"]
-std = ["alloc", "getrandom", "serde_bytes/std"]
+std = ["alloc", "getrandom", "serde_bytes/std", "rand"]
 asm = ["sha2/asm"]
 serde = ["serde_crate", "serde_bytes", "cfg-if"]
 # We cannot make getrandom a direct dependency because rand_core makes
 # getrandom a feature name, which requires forwarding.
-getrandom = ["rand_core/getrandom"]
+getrandom = ["rand_core/getrandom", "rand/std_rng"]
 # We thus cannot forward the wasm-bindgen feature of getrandom,
 # but our consumers could depend upon getrandom and activate its
 # wasm-bindgen feature themselve, which works due to cargo features

src/lib.rs

@@ -224,11 +224,16 @@ extern crate alloc;
 use rand_core::{RngCore,CryptoRng};
 use curve25519_dalek::scalar::Scalar;
 
-#[cfg(feature = "getrandom")] 
+#[cfg(all( feature = "getrandom", not(feature = "std") ))]
 fn rand_hack() -> impl RngCore+CryptoRng {
     rand_core::OsRng
 }
 
+#[cfg(all( feature = "getrandom", feature = "std" ))]
+fn rand_hack() -> impl RngCore+CryptoRng {
+    rand::thread_rng()
+}
+
 #[cfg(not(feature = "getrandom"))]
 fn rand_hack() -> impl RngCore+CryptoRng {
     const PRM: &'static str = "Attempted to use functionality that requires system randomness!!";