update tiny-keccak (#4093)

* update tiny-keccak

* fix

* Update Cargo.toml

* update Cargo.lock

* remove keccak-hasher

substrate/core/primitives/Cargo.toml

@@ -32,7 +32,7 @@ zeroize = { version = "0.10.1", default-features = false }
 lazy_static = { version = "1.4.0", default-features = false, optional = true }
 parking_lot = { version = "0.9.0", optional = true }
 libsecp256k1 = { version = "0.3.0", default-features = false, optional = true }
-tiny-keccak = { version = "1.5.0", optional = true }
+tiny-keccak = { version = "2.0.1", features = ["keccak"], optional = true }
 substrate-debug-derive = { version = "2.0.0", path = "./debug-derive" }
 externalities = { package = "substrate-externalities", path = "../externalities", optional = true }
 primitives-storage = { package = "substrate-primitives-storage", path = "storage", default-features = false }
@@ -100,6 +100,7 @@ std = [
 full_crypto = [
 	"ed25519-dalek",
 	"blake2-rfc",
+	"tiny-keccak",
 	"schnorrkel",
 	"libsecp256k1",
 	"hex",

substrate/core/primitives/src/hashing.rs

@@ -17,6 +17,7 @@
 //! Hashing functions.
 
 use blake2_rfc;
+use tiny_keccak::{Hasher, Keccak};
 use twox_hash;
 
 /// Do a Blake2 512-bit hash and place result in `dest`.
@@ -121,3 +122,12 @@ pub fn twox_256(data: &[u8]) -> [u8; 32] {
 	twox_256_into(data, &mut r);
 	r
 }
+
+/// Do a keccak 256 hash and return result.
+pub fn keccak_256(data: &[u8]) -> [u8; 32] {
+	let mut keccak = Keccak::v256();
+	keccak.update(data);
+	let mut output = [0u8; 32];
+	keccak.finalize(&mut output);
+	output
+}

substrate/core/primitives/src/lib.rs

@@ -50,7 +50,7 @@ pub use impl_serde::serialize as bytes;
 #[cfg(feature = "full_crypto")]
 pub mod hashing;
 #[cfg(feature = "full_crypto")]
-pub use hashing::{blake2_128, blake2_256, twox_64, twox_128, twox_256};
+pub use hashing::{blake2_128, blake2_256, twox_64, twox_128, twox_256, keccak_256};
 #[cfg(feature = "std")]
 pub mod hexdisplay;
 pub mod crypto;