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update to spec

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This commit is contained in:
lollerfirst
2025-08-06 17:01:52 +02:00
parent ad8f1ece5c
commit 25e38701d8
1 changed files with 3 additions and 1 deletions
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4
crates/cashu/src/nuts/nut13.rs
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@@ -69,6 +69,7 @@ impl Secret {
message.extend_from_slice(b"Cashu_KDF_HMAC_SHA512");
message.extend_from_slice(&keyset_id.to_bytes());
message.extend_from_slice(&(counter as u64).to_be_bytes());
message.extend_from_slice(b"\x00");
let mut engine = HmacEngine::<sha512::Hash>::new(seed);
engine.input(&message);
@@ -103,6 +104,7 @@ impl SecretKey {
message.extend_from_slice(b"Cashu_KDF_HMAC_SHA512");
message.extend_from_slice(&keyset_id.to_bytes());
message.extend_from_slice(&(counter as u64).to_be_bytes());
message.extend_from_slice(b"\x01");
let mut engine = HmacEngine::<sha512::Hash>::new(seed);
engine.input(&message);
@@ -110,7 +112,7 @@ impl SecretKey {
let result_bytes = hmac_result.to_byte_array();
Ok(Self::from(secp256k1::SecretKey::from_slice(
&result_bytes[32..],
&result_bytes[..32],
)?))
}
}