Migrate zcash_primitives to rand_core 0.4

Cargo.lock

@@ -621,7 +621,8 @@ dependencies = [
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pairing 0.14.2",
- "rand 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "sapling-crypto 0.0.1",
  "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

zcash_primitives/Cargo.toml

@@ -15,6 +15,7 @@ fpe = "0.1"
 hex = "0.3"
 lazy_static = "1"
 pairing = { path = "../pairing" }
-rand = "0.5"
+rand_core = "0.4"
+rand_os = "0.1"
 sapling-crypto = { path = "../sapling-crypto" }
 sha2 = "0.8"

zcash_primitives/src/lib.rs

@@ -9,7 +9,8 @@ extern crate ff;
 extern crate fpe;
 extern crate hex;
 extern crate pairing;
-extern crate rand;
+extern crate rand_core;
+extern crate rand_os;
 extern crate sapling_crypto;
 extern crate sha2;
 

zcash_primitives/src/merkle_tree.rs

@@ -202,12 +202,12 @@ impl<Node: Hashable> CommitmentTree<Node> {
 /// ```
 /// extern crate ff;
 /// extern crate pairing;
-/// extern crate rand;
+/// extern crate rand_os;
 /// extern crate zcash_primitives;
 ///
 /// use ff::{Field, PrimeField};
 /// use pairing::bls12_381::Fr;
-/// use rand::OsRng;
+/// use rand_os::OsRng;
 /// use zcash_primitives::{
 ///     merkle_tree::{CommitmentTree, IncrementalWitness},
 ///     sapling::Node,

zcash_primitives/src/note_encryption.rs

@@ -5,7 +5,8 @@ use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 use crypto_api_chachapoly::{ChaCha20Ietf, ChachaPolyIetf};
 use ff::{PrimeField, PrimeFieldRepr};
 use pairing::bls12_381::{Bls12, Fr};
-use rand::{OsRng, Rng};
+use rand_core::RngCore;
+use rand_os::OsRng;
 use sapling_crypto::{
     jubjub::{
         edwards,
@@ -138,9 +139,7 @@ fn generate_esk() -> Fs {
     // create random 64 byte buffer
     let mut rng = OsRng::new().expect("should be able to construct RNG");
     let mut buffer = [0u8; 64];
-    for i in 0..buffer.len() {
-        buffer[i] = rng.gen();
-    }
+    rng.fill_bytes(&mut buffer);
 
     // reduce to uniform value
     Fs::to_uniform(&buffer[..])
@@ -213,12 +212,12 @@ fn prf_ock(
 /// ```
 /// extern crate ff;
 /// extern crate pairing;
-/// extern crate rand;
+/// extern crate rand_os;
 /// extern crate sapling_crypto;
 ///
 /// use ff::Field;
 /// use pairing::bls12_381::Bls12;
-/// use rand::OsRng;
+/// use rand_os::OsRng;
 /// use sapling_crypto::{
 ///     jubjub::fs::Fs,
 ///     primitives::{Diversifier, PaymentAddress, ValueCommitment},
@@ -562,7 +561,8 @@ mod tests {
     use crypto_api_chachapoly::ChachaPolyIetf;
     use ff::{Field, PrimeField, PrimeFieldRepr};
     use pairing::bls12_381::{Bls12, Fr, FrRepr};
-    use rand::{thread_rng, RngCore};
+    use rand_core::RngCore;
+    use rand_os::OsRng;
     use sapling_crypto::{
         jubjub::{
             edwards,
@@ -848,7 +848,7 @@ mod tests {
 
     #[test]
     fn decryption_with_invalid_ivk() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (_, _, _, cmu, epk, enc_ciphertext, _) = random_enc_ciphertext(&mut rng);
 
@@ -860,7 +860,7 @@ mod tests {
 
     #[test]
     fn decryption_with_invalid_epk() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (_, ivk, _, cmu, _, enc_ciphertext, _) = random_enc_ciphertext(&mut rng);
 
@@ -877,7 +877,7 @@ mod tests {
 
     #[test]
     fn decryption_with_invalid_cmu() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (_, ivk, _, _, epk, enc_ciphertext, _) = random_enc_ciphertext(&mut rng);
 
@@ -889,7 +889,7 @@ mod tests {
 
     #[test]
     fn decryption_with_invalid_tag() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (_, ivk, _, cmu, epk, mut enc_ciphertext, _) = random_enc_ciphertext(&mut rng);
 
@@ -902,7 +902,7 @@ mod tests {
 
     #[test]
     fn decryption_with_invalid_version_byte() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, ivk, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -924,7 +924,7 @@ mod tests {
 
     #[test]
     fn decryption_with_invalid_diversifier() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, ivk, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -946,7 +946,7 @@ mod tests {
 
     #[test]
     fn decryption_with_incorrect_diversifier() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, ivk, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -968,7 +968,7 @@ mod tests {
 
     #[test]
     fn compact_decryption_with_invalid_ivk() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (_, _, _, cmu, epk, enc_ciphertext, _) = random_enc_ciphertext(&mut rng);
 
@@ -985,7 +985,7 @@ mod tests {
 
     #[test]
     fn compact_decryption_with_invalid_epk() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (_, ivk, _, cmu, _, enc_ciphertext, _) = random_enc_ciphertext(&mut rng);
 
@@ -1002,7 +1002,7 @@ mod tests {
 
     #[test]
     fn compact_decryption_with_invalid_cmu() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (_, ivk, _, _, epk, enc_ciphertext, _) = random_enc_ciphertext(&mut rng);
 
@@ -1019,7 +1019,7 @@ mod tests {
 
     #[test]
     fn compact_decryption_with_invalid_version_byte() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, ivk, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -1046,7 +1046,7 @@ mod tests {
 
     #[test]
     fn compact_decryption_with_invalid_diversifier() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, ivk, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -1073,7 +1073,7 @@ mod tests {
 
     #[test]
     fn compact_decryption_with_incorrect_diversifier() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, ivk, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -1100,7 +1100,7 @@ mod tests {
 
     #[test]
     fn recovery_with_invalid_ovk() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (mut ovk, _, cv, cmu, epk, enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -1114,7 +1114,7 @@ mod tests {
 
     #[test]
     fn recovery_with_invalid_cv() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, _, _, cmu, epk, enc_ciphertext, out_ciphertext) = random_enc_ciphertext(&mut rng);
 
@@ -1133,7 +1133,7 @@ mod tests {
 
     #[test]
     fn recovery_with_invalid_cmu() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, _, cv, _, epk, enc_ciphertext, out_ciphertext) = random_enc_ciphertext(&mut rng);
 
@@ -1152,7 +1152,7 @@ mod tests {
 
     #[test]
     fn recovery_with_invalid_epk() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, _, cv, cmu, _, enc_ciphertext, out_ciphertext) = random_enc_ciphertext(&mut rng);
 
@@ -1171,7 +1171,7 @@ mod tests {
 
     #[test]
     fn recovery_with_invalid_enc_tag() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, _, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -1185,7 +1185,7 @@ mod tests {
 
     #[test]
     fn recovery_with_invalid_out_tag() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, _, cv, cmu, epk, enc_ciphertext, mut out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -1199,7 +1199,7 @@ mod tests {
 
     #[test]
     fn recovery_with_invalid_version_byte() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, _, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -1221,7 +1221,7 @@ mod tests {
 
     #[test]
     fn recovery_with_invalid_diversifier() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, _, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);
@@ -1243,7 +1243,7 @@ mod tests {
 
     #[test]
     fn recovery_with_incorrect_diversifier() {
-        let mut rng = thread_rng();
+        let mut rng = OsRng::new().expect("should be able to construct RNG");
 
         let (ovk, _, cv, cmu, epk, mut enc_ciphertext, out_ciphertext) =
             random_enc_ciphertext(&mut rng);

zcash_primitives/src/sapling.rs

@@ -2,7 +2,7 @@
 
 use ff::{BitIterator, PrimeField, PrimeFieldRepr};
 use pairing::bls12_381::{Bls12, Fr, FrRepr};
-use rand::OsRng;
+use rand_os::OsRng;
 use sapling_crypto::{
     jubjub::{fs::Fs, FixedGenerators, JubjubBls12},
     pedersen_hash::{pedersen_hash, Personalization},

zcash_primitives/src/transaction/tests.rs

@@ -1,6 +1,6 @@
 use ff::Field;
 use pairing::bls12_381::Bls12;
-use rand::thread_rng;
+use rand_os::OsRng;
 use sapling_crypto::{
     jubjub::{fs::Fs, FixedGenerators},
     redjubjub::PrivateKey,
@@ -197,7 +197,7 @@ fn tx_write_rejects_unexpected_binding_sig() {
 
     // Fails with an unexpected binding signature
     {
-        let rng = &mut thread_rng();
+        let rng = &mut OsRng::new().expect("should be able to construct RNG");
         let sk = PrivateKey::<Bls12>(Fs::random(rng));
         let sig = sk.sign(
             b"Foo bar",