Update to k256 pre-release to allow high-S in recover pubkey

packages/crypto/Cargo.toml

@@ -16,13 +16,11 @@ bench = false
 
 [dependencies]
 # Version pinned due to https://github.com/CosmWasm/cosmwasm/issues/2010
-k256 = { version = "=0.13.1", features = ["ecdsa"] }
+k256 = { git = "https://github.com/RustCrypto/elliptic-curves.git", features = ["ecdsa"] }
 ed25519-zebra = "3"
-digest = "0.10"
+digest = "0.11.0-pre.8"
 rand_core = { version = "0.6", features = ["getrandom"] }
 thiserror = "1.0.38"
-# Not used directly, but needed to bump transitive dependency, see: https://github.com/CosmWasm/cosmwasm/pull/1899 for details.
-ecdsa = "0.16.2"
 
 [dev-dependencies]
 criterion = "0.5.1"

packages/crypto/src/identity_digest.rs

@@ -4,19 +4,18 @@
 //!
 //! Adapted from `sha2` [sha256.rs](https://github.com/RustCrypto/hashes/blob/master/sha2/src/sha256.rs)
 use digest::consts::U32;
-use digest::generic_array::GenericArray;
 use digest::{FixedOutput, HashMarker, Output, OutputSizeUser, Reset, Update};
 
 /// The 256-bits identity container
 #[derive(Clone, Default)]
 pub struct Identity256 {
-    array: GenericArray<u8, U32>,
+    array: [u8; 32],
 }
 
 impl Update for Identity256 {
     fn update(&mut self, hash: &[u8]) {
-        assert_eq!(hash.as_ref().len(), 32);
-        self.array = *GenericArray::from_slice(hash);
+        // copy_from_slice panicks if input is not 32 bytes long
+        self.array.copy_from_slice(hash);
     }
 }
 
@@ -26,7 +25,7 @@ impl OutputSizeUser for Identity256 {
 
 impl FixedOutput for Identity256 {
     fn finalize_into(self, out: &mut Output<Self>) {
-        *out = self.array;
+        *out = self.array.into();
     }
 }