Replace rand with rand_core+rand_os

Cargo.toml

@@ -26,6 +26,7 @@ features = ["nightly"]
 travis-ci = { repository = "dalek-cryptography/curve25519-dalek", branch = "master"}
 
 [dev-dependencies]
+rand_os = "0.1.0"
 sha2 = { version = "0.8", default-features = false }
 bincode = "1"
 criterion = "0.2"
@@ -41,7 +42,7 @@ harness = false
 # match exactly, since the build.rs uses the crate itself as a library.
 
 [dependencies]
-rand = { version = "0.6.0", default-features = false }
+rand_core = { version = "0.3.0", default-features = false }
 byteorder = { version = "^1.2.3", default-features = false, features = ["i128"] }
 digest = { version = "0.8", default-features = false }
 clear_on_drop = "=0.2.3"
@@ -50,7 +51,7 @@ serde = { version = "1.0", optional = true }
 packed_simd = { version = "0.3.0", features = ["into_bits"], optional = true }
 
 [build-dependencies]
-rand = { version = "0.6.0", default-features = false }
+rand_core = { version = "0.3.0", default-features = false }
 byteorder = { version = "^1.2.3", default-features = false, features = ["i128"] }
 digest = { version = "0.8", default-features = false }
 clear_on_drop = "=0.2.3"
@@ -61,7 +62,7 @@ packed_simd = { version = "0.3.0", features = ["into_bits"], optional = true }
 [features]
 nightly = ["subtle/nightly", "clear_on_drop/nightly"]
 default = ["std", "u64_backend"]
-std = ["alloc", "subtle/std", "rand/std"]
+std = ["alloc", "subtle/std", "rand_core/std"]
 alloc = []
 yolocrypto = []
 

benches/dalek_benchmarks.rs

@@ -1,7 +1,7 @@
 #![allow(non_snake_case)]
 
-extern crate rand;
-use rand::rngs::OsRng;
+extern crate rand_os;
+use rand_os::OsRng;
 
 #[macro_use]
 extern crate criterion;

build.rs

@@ -10,7 +10,7 @@ extern crate byteorder;
 extern crate clear_on_drop;
 extern crate core;
 extern crate digest;
-extern crate rand;
+extern crate rand_core;
 extern crate subtle;
 
 #[cfg(all(feature = "nightly", feature = "avx2_backend"))]

src/lib.rs

@@ -41,10 +41,12 @@ extern crate std;
 #[cfg(all(feature = "nightly", feature = "avx2_backend"))]
 extern crate packed_simd;
 
-extern crate rand;
+extern crate rand_core;
 extern crate clear_on_drop;
 extern crate byteorder;
 pub extern crate digest;
+#[cfg(all(test, feature = "stage2_build"))]
+extern crate rand_os;
 
 // Used for traits related to constant-time code.
 extern crate subtle;

src/montgomery.rs

@@ -305,7 +305,7 @@ mod test {
     use super::*;
 
     #[cfg(feature = "rand")]
-    use rand::rngs::OsRng;
+    use rand_os::OsRng;
 
     /// Test Montgomery -> Edwards on the X/Ed25519 basepoint
     #[test]

src/ristretto.rs

@@ -164,7 +164,7 @@ use core::ops::{Add, Neg, Sub};
 use core::ops::{AddAssign, SubAssign};
 use core::ops::{Mul, MulAssign};
 
-use rand::{CryptoRng, Rng};
+use rand_core::{CryptoRng, RngCore};
 
 use digest::generic_array::typenum::U64;
 use digest::Digest;
@@ -462,8 +462,8 @@ impl RistrettoPoint {
     /// ```
     /// # extern crate curve25519_dalek;
     /// # use curve25519_dalek::ristretto::RistrettoPoint;
-    /// extern crate rand;
-    /// use rand::rngs::OsRng;
+    /// extern crate rand_os;
+    /// use rand_os::OsRng;
     ///
     /// # // Need fn main() here in comment so the doctest compiles
     /// # // See https://doc.rust-lang.org/book/documentation.html#documentation-as-tests
@@ -609,7 +609,7 @@ impl RistrettoPoint {
     ///
     /// # Inputs
     ///
-    /// * `rng`: any RNG which implements the `rand::Rng` interface.
+    /// * `rng`: any RNG which implements the `RngCore + CryptoRng` interface.
     ///
     /// # Returns
     ///
@@ -621,9 +621,9 @@ impl RistrettoPoint {
     /// discrete log of the output point with respect to any other
     /// point should be unknown.  The map is applied twice and the
     /// results are added, to ensure a uniform distribution.
-    pub fn random<T: Rng + CryptoRng>(rng: &mut T) -> Self {
+    pub fn random<T: RngCore + CryptoRng>(rng: &mut T) -> Self {
         let mut uniform_bytes = [0u8; 64];
-        rng.fill(&mut uniform_bytes);
+        rng.fill_bytes(&mut uniform_bytes);
 
         RistrettoPoint::from_uniform_bytes(&uniform_bytes)
     }
@@ -1014,7 +1014,7 @@ impl Debug for RistrettoPoint {
 #[cfg(all(test, feature = "stage2_build"))]
 mod test {
     #[cfg(feature = "rand")]
-    use rand::rngs::OsRng;
+    use rand_os::OsRng;
 
     use scalar::Scalar;
     use constants;

src/scalar.rs

@@ -151,7 +151,7 @@ use core::ops::{Sub, SubAssign};
 #[allow(unused_imports)]
 use prelude::*;
 
-use rand::{CryptoRng, Rng};
+use rand_core::{CryptoRng, RngCore};
 
 use digest::generic_array::typenum::U64;
 use digest::Digest;
@@ -507,7 +507,7 @@ impl Scalar {
     ///
     /// # Inputs
     ///
-    /// * `rng`: any RNG which implements the `rand::CryptoRng` interface.
+    /// * `rng`: any RNG which implements the `RngCore + CryptoRng` interface.
     ///
     /// # Returns
     ///
@@ -516,20 +516,20 @@ impl Scalar {
     /// # Example
     ///
     /// ```
-    /// extern crate rand;
+    /// extern crate rand_os;
     /// # extern crate curve25519_dalek;
     /// #
     /// # fn main() {
     /// use curve25519_dalek::scalar::Scalar;
     ///
-    /// use rand::OsRng;
+    /// use rand_os::OsRng;
     ///
     /// let mut csprng: OsRng = OsRng::new().unwrap();
     /// let a: Scalar = Scalar::random(&mut csprng);
     /// # }
-    pub fn random<T: Rng + CryptoRng>(rng: &mut T) -> Self {
+    pub fn random<T: RngCore + CryptoRng>(rng: &mut T) -> Self {
         let mut scalar_bytes = [0u8; 64];
-        rng.fill(&mut scalar_bytes);
+        rng.fill_bytes(&mut scalar_bytes);
         Scalar::from_bytes_mod_order_wide(&scalar_bytes)
     }