Initial eVRF implementation

Not quite done yet. It needs to communicate the resulting points and proofs to
extract them from the Pedersen Commitments in order to return those, and then
be tested.

crypto/evrf/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "evrf"
+version = "0.1.0"
+description = "Implementation of an eVRF premised on Generalized Bulletproofs"
+license = "MIT"
+repository = "https://github.com/serai-dex/serai/tree/develop/crypto/evrf"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+keywords = ["ciphersuite", "ff", "group"]
+edition = "2021"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[dependencies]
+subtle = { version = "2", default-features = false, features = ["std"] }
+zeroize = { version = "^1.5", default-features = false, features = ["zeroize_derive"] }
+
+rand_core = { version = "0.6", default-features = false, features = ["std"] }
+rand_chacha = { version = "0.3", default-features = false, features = ["std"] }
+
+generic-array = { version = "1", default-features = false, features = ["alloc"] }
+
+blake2 = { version = "0.10", default-features = false, features = ["std"] }
+
+multiexp = { path = "../multiexp", version = "0.4", default-features = false, features = ["std", "batch"] }
+ciphersuite = { path = "../ciphersuite", version = "0.4", default-features = false, features = ["std"] }
+
+ec-divisors = { path = "./divisors" }
+generalized-bulletproofs = { path = "./generalized-bulletproofs" }
+generalized-bulletproofs-circuit-abstraction = { path = "./circuit-abstraction" }
+generalized-bulletproofs-ec-gadgets = { path = "./ec-gadgets" }