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fixed cssk to use k256

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This commit is contained in:
jonesmarvin8 2026-04-01 12:39:21 -04:00
parent 900b7b8d53
commit b53f02bf24
1 changed files with 17 additions and 34 deletions
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51
key_protocol/src/key_management/key_tree/keys_public.rs
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@ -21,7 +21,7 @@ impl ChildKeysPublic {
// Non-harden. // Non-harden.
// BIP-032 compatibility requires 1-byte header from the public_key; // BIP-032 compatibility requires 1-byte header from the public_key;
// Not stored in `self.cpk.value()`. // Not stored in `self.cpk.value()`.
let sk = k256::SecretKey::from_bytes(self.csk.value().into()) let sk = k256::SecretKey::from_bytes(self.cssk.value().into())
.expect("32 bytes, within curve order"); .expect("32 bytes, within curve order");
let pk = sk.public_key(); let pk = sk.public_key();
hash_input.extend_from_slice(pk.to_encoded_point(true).as_bytes()); hash_input.extend_from_slice(pk.to_encoded_point(true).as_bytes());
@ -65,42 +65,25 @@ impl KeyNode for ChildKeysPublic {
fn nth_child(&self, cci: u32) -> Self { fn nth_child(&self, cci: u32) -> Self {
let hash_value = self.compute_hash_value(cci); let hash_value = self.compute_hash_value(cci);
let cssk = secp256k1::SecretKey::from_byte_array( let cssk = nssa::PrivateKey::try_new(
*hash_value (k256::Scalar::from_repr(
.first_chunk::<32>() (*hash_value
.expect("hash_value is 64 bytes, must be safe to get first 32"), .first_chunk::<32>()
.expect("hash_value is 64 bytes, must be safe to get first 32"))
.into(),
)
.expect("Expect a valid k256 scalar"))
.add(
&k256::Scalar::from_repr((*self.cssk.value()).into())
.expect("Expect a valid k256 scalar"),
)
.to_bytes()
.into(),
) )
.unwrap();
/*
let cssk = nssa::PrivateKey::try_new({
cssk.add_tweak(&Scalar::from_be_bytes(*self.cssk.value()).unwrap())
.expect("Expect a valid Scalar")
.secret_bytes()
})
.unwrap();
let csk = nssa::PrivateKey::tweak(cssk.value()).unwrap();
assert!(
secp256k1::constants::CURVE_ORDER >= *csk.value(),
"Secret key cannot exceed curve order"
);
*/
let csk = nssa::PrivateKey::try_new({
let hash_value = hash_value
.first_chunk::<32>()
.expect("hash_value is 64 bytes, must be safe to get first 32");
let value_1 =
k256::Scalar::from_repr((*hash_value).into()).expect("Expect a valid k256 scalar");
let value_2 = k256::Scalar::from_repr((*self.csk.value()).into())
.expect("Expect a valid k256 scalar");
let sum = value_1.add(&value_2);
sum.to_bytes().into()
})
.expect("Expect a valid private key"); .expect("Expect a valid private key");
let csk = nssa::PrivateKey::tweak(cssk.value()).expect("Expect a valid Private Key");
let ccc = *hash_value let ccc = *hash_value
.last_chunk::<32>() .last_chunk::<32>()
.expect("hash_value is 64 bytes, must be safe to get last 32"); .expect("hash_value is 64 bytes, must be safe to get last 32");