Updating rand_core to 0.6 (without curve25519-dalek library change) (#131)

Author: kevinlewi

Cargo.lock

@@ -25,7 +25,7 @@ generic-bytes = { version = "0.1.0" }
 generic-bytes-derive = { version = "0.1.0" }
 hkdf = "0.10.0"
 hmac = "0.10.1"
-rand_core = "0.5.1"
+rand_core = { version = "0.6.0", features = ["getrandom"] }
 scrypt = { version = "0.5.0", optional = true }
 subtle = { version = "2.3.0", default-features = false }
 thiserror = "1.0.22"
@@ -41,7 +41,7 @@ lazy_static = "1.4.0"
 serde_json = "1.0.60"
 sha2 = "0.9.2"
 proptest = "0.10.1"
-rand = "0.7"
+rand = "0.8"
 rustyline = "7.0.0"
 
 [[bench]]

Cargo.toml

@@ -79,7 +79,11 @@ impl Group for RistrettoPoint {
     }
     fn random_scalar<R: RngCore + CryptoRng>(rng: &mut R) -> Self::Scalar {
         #[cfg(not(test))]
-        return Scalar::random(rng);
+        {
+            let mut scalar_bytes = [0u8; 64];
+            rng.fill_bytes(&mut scalar_bytes);
+            Scalar::from_bytes_mod_order_wide(&scalar_bytes)
+        }
 
         // Tests need an exact conversion from bytes to scalar, sampling only 32 bytes from rng
         #[cfg(test)]