Re-export the frost-core traits and rand-core as part of top-level impls API (#297)

* Re-export the frost-core traits and rand-core as part of top-level impls API

* Don't export frost_core::frost

---------

Co-authored-by: Conrado Gouvea <conradoplg@gmail.com>

frost-ed25519/src/lib.rs

@@ -11,11 +11,15 @@ use curve25519_dalek::{
 use rand_core::{CryptoRng, RngCore};
 use sha2::{Digest, Sha512};
 
-use frost_core::{frost, Ciphersuite, Field, FieldError, Group, GroupError};
+use frost_core::frost;
 
 #[cfg(test)]
 mod tests;
 
+// Re-exports in our public API
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
+pub use rand_core;
+
 /// An error.
 pub type Error = frost_core::Error<Ed25519Sha512>;
 

frost-ed25519/tests/frost.rs

@@ -1,4 +1,3 @@
-use frost_core::{Ciphersuite, Group, GroupError};
 use frost_ed25519::*;
 
 use curve25519_dalek::{edwards::EdwardsPoint, traits::Identity};

frost-ed448/src/lib.rs

@@ -12,11 +12,15 @@ use sha3::{
     Shake256,
 };
 
-use frost_core::{frost, Ciphersuite, Field, FieldError, Group, GroupError};
+use frost_core::frost;
 
 #[cfg(test)]
 mod tests;
 
+// Re-exports in our public API
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
+pub use rand_core;
+
 /// An error.
 pub type Error = frost_core::Error<Ed448Shake256>;
 

frost-ed448/tests/frost.rs

@@ -1,5 +1,5 @@
 use ed448_goldilocks::curve::ExtendedPoint;
-use frost_core::{Ciphersuite, Group, GroupError};
+
 use frost_ed448::*;
 use rand::thread_rng;
 

frost-p256/src/lib.rs

@@ -13,11 +13,15 @@ use p256::{
 use rand_core::{CryptoRng, RngCore};
 use sha2::{Digest, Sha256};
 
-use frost_core::{frost, Ciphersuite, Field, FieldError, Group, GroupError};
+use frost_core::frost;
 
 #[cfg(test)]
 mod tests;
 
+// Re-exports in our public API
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
+pub use rand_core;
+
 /// An error.
 pub type Error = frost_core::Error<P256Sha256>;
 

frost-p256/tests/frost.rs

@@ -1,4 +1,3 @@
-use frost_core::{Ciphersuite, Group, GroupError};
 use frost_p256::*;
 use rand::thread_rng;
 

frost-rerandomized/src/lib.rs

@@ -12,6 +12,8 @@ use frost_core::{
     Ciphersuite, Error, Field, Group, VerifyingKey,
 };
 
+// When pulled into `reddsa`, that has its own sibling `rand_core` import.
+// For the time being, we do not re-export this `rand_core`.
 use rand_core::{CryptoRng, RngCore};
 
 /// Performed once by each participant selected for the signing operation.

frost-ristretto255/src/lib.rs

@@ -11,11 +11,15 @@ use curve25519_dalek::{
 use rand_core::{CryptoRng, RngCore};
 use sha2::{Digest, Sha512};
 
-use frost_core::{frost, Ciphersuite, Field, FieldError, Group, GroupError};
+use frost_core::frost;
 
 #[cfg(test)]
 mod tests;
 
+// Re-exports in our public API
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
+pub use rand_core;
+
 /// An error.
 pub type Error = frost_core::Error<Ristretto255Sha512>;
 

frost-ristretto255/tests/frost.rs

@@ -1,5 +1,4 @@
 use curve25519_dalek::{ristretto::RistrettoPoint, traits::Identity};
-use frost_core::{Ciphersuite, Group, GroupError};
 use frost_ristretto255::*;
 use rand::thread_rng;
 

frost-secp256k1/src/lib.rs

@@ -14,11 +14,15 @@ use k256::{
 use rand_core::{CryptoRng, RngCore};
 use sha2::{Digest, Sha256};
 
-use frost_core::{frost, Ciphersuite, Field, FieldError, Group, GroupError};
+use frost_core::frost;
 
 #[cfg(test)]
 mod tests;
 
+// Re-exports in our public API
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
+pub use rand_core;
+
 /// An error.
 pub type Error = frost_core::Error<Secp256K1Sha256>;
 

frost-secp256k1/tests/frost.rs

@@ -1,4 +1,3 @@
-use frost_core::{Ciphersuite, Group, GroupError};
 use frost_secp256k1::*;
 use rand::thread_rng;