Initial crypto crate

Cargo.lock

@@ -400,6 +400,15 @@ dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "crypto"
+version = "0.1.0"
+dependencies = [
+ "curve25519-dalek 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "crypto-mac"
 version = "0.7.0"

Cargo.toml

@@ -7,6 +7,7 @@ members = [
     "clients/provider-client",
     "clients/validator-client",
     "common/addressing",
+    "common/crypto",
     "common/topology",
     "mixnode",
     "sfw-provider",

clients/nym-client/src/identity/mixnet.rs

@@ -1,33 +0,0 @@
-use curve25519_dalek::montgomery::MontgomeryPoint;
-use curve25519_dalek::scalar::Scalar;
-
-// This keypair serves as the user's identity within the Mixnet
-pub struct KeyPair {
-    pub private: Scalar,
-    pub public: MontgomeryPoint,
-}
-
-impl KeyPair {
-    pub fn new() -> KeyPair {
-        let (private, public) = sphinx::crypto::keygen();
-        KeyPair { private, public }
-    }
-
-    pub fn from_bytes(private_bytes: Vec<u8>, public_bytes: Vec<u8>) -> KeyPair {
-        let mut bytes = [0; 32];
-        bytes.copy_from_slice(&private_bytes[..]);
-        let private = Scalar::from_canonical_bytes(bytes).unwrap();
-        let mut bytes = [0; 32];
-        bytes.copy_from_slice(&public_bytes[..]);
-        let public = MontgomeryPoint(bytes);
-        KeyPair { private, public }
-    }
-
-    pub fn private_bytes(&self) -> [u8; 32] {
-        self.private.to_bytes()
-    }
-
-    pub fn public_bytes(&self) -> [u8; 32] {
-        self.public.to_bytes()
-    }
-}

clients/nym-client/src/identity/mod.rs

@@ -1 +0,0 @@
-pub mod mixnet;

clients/nym-client/src/identity/validators.rs

@@ -1 +0,0 @@
-// TODO types for Validator keys will go in here once we hook this up.

common/crypto/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "crypto"
+version = "0.1.0"
+authors = ["Jedrzej Stuczynski <andrew@nymtech.net"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+curve25519-dalek = "1.2.3"
+rand = "0.7.2"
+rand_os = "0.1"

common/crypto/src/lib.rs

@@ -0,0 +1,2 @@
+pub mod encryption;
+pub mod identity;