Directory Restructure (#1163)

* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path

crypto/bls/src/lib.rs

@@ -0,0 +1,83 @@
+extern crate milagro_bls;
+extern crate ssz;
+
+#[macro_use]
+mod macros;
+mod keypair;
+mod public_key_bytes;
+mod secret_key;
+mod signature_bytes;
+mod signature_set;
+
+pub use crate::keypair::Keypair;
+pub use crate::public_key_bytes::PublicKeyBytes;
+pub use crate::secret_key::SecretKey;
+pub use crate::signature_bytes::SignatureBytes;
+pub use milagro_bls::{compress_g2, hash_to_curve_g2};
+pub use signature_set::{verify_signature_sets, SignatureSet};
+
+#[cfg(feature = "arbitrary")]
+pub use arbitrary;
+
+#[cfg(feature = "fake_crypto")]
+mod fake_aggregate_public_key;
+#[cfg(feature = "fake_crypto")]
+mod fake_aggregate_signature;
+#[cfg(feature = "fake_crypto")]
+mod fake_public_key;
+#[cfg(feature = "fake_crypto")]
+mod fake_signature;
+
+#[cfg(not(feature = "fake_crypto"))]
+mod aggregate_public_key;
+#[cfg(not(feature = "fake_crypto"))]
+mod aggregate_signature;
+#[cfg(not(feature = "fake_crypto"))]
+mod public_key;
+#[cfg(not(feature = "fake_crypto"))]
+mod signature;
+
+#[cfg(feature = "fake_crypto")]
+pub use fakes::*;
+#[cfg(feature = "fake_crypto")]
+mod fakes {
+    pub use crate::fake_aggregate_public_key::FakeAggregatePublicKey as AggregatePublicKey;
+    pub use crate::fake_aggregate_signature::FakeAggregateSignature as AggregateSignature;
+    pub use crate::fake_public_key::FakePublicKey as PublicKey;
+    pub use crate::fake_signature::FakeSignature as Signature;
+}
+
+#[cfg(not(feature = "fake_crypto"))]
+pub use reals::*;
+#[cfg(not(feature = "fake_crypto"))]
+mod reals {
+    pub use crate::aggregate_public_key::AggregatePublicKey;
+    pub use crate::aggregate_signature::AggregateSignature;
+    pub use crate::public_key::PublicKey;
+    pub use crate::signature::Signature;
+}
+
+pub const BLS_AGG_SIG_BYTE_SIZE: usize = 96;
+pub const BLS_SIG_BYTE_SIZE: usize = 96;
+pub const BLS_SECRET_KEY_BYTE_SIZE: usize = 32;
+pub const BLS_PUBLIC_KEY_BYTE_SIZE: usize = 48;
+
+use eth2_hashing::hash;
+use ssz::ssz_encode;
+
+/// Returns the withdrawal credentials for a given public key.
+pub fn get_withdrawal_credentials(pubkey: &PublicKey, prefix_byte: u8) -> Vec<u8> {
+    let hashed = hash(&ssz_encode(pubkey));
+    let mut prefixed = vec![prefix_byte];
+    prefixed.extend_from_slice(&hashed[1..]);
+
+    prefixed
+}
+
+pub fn bls_verify_aggregate(
+    pubkey: &AggregatePublicKey,
+    message: &[u8],
+    signature: &AggregateSignature,
+) -> bool {
+    signature.verify(message, pubkey)
+}