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

packages/crypto/Cargo.toml

@@ -15,9 +15,9 @@ default = []
 bench = false
 
 [dependencies]
-k256 = { version = "0.13.3", 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"
 

packages/crypto/benches/main.rs

@@ -6,9 +6,8 @@ use hex_literal::hex;
 use serde::Deserialize;
 
 // Crypto stuff
-use digest::Digest;
 use k256::ecdsa::SigningKey; // type alias
-use sha2::Sha256;
+use sha2::{Digest, Sha256};
 
 use cosmwasm_crypto::{
     ed25519_batch_verify, ed25519_verify, secp256k1_recover_pubkey, secp256k1_verify,

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();
     }
 }