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Expose underlying ExpandedSpendingKey and FullViewingKey for writing

This commit is contained in:
Jack Grigg 2018-08-01 10:41:50 +01:00
parent 599079fafe
commit 80130f5656
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GPG Key ID: 1B8D649257DB0829
1 changed files with 24 additions and 22 deletions
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46
src/lib.rs
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@ -58,14 +58,14 @@ impl OutgoingViewingKey {
/// A Sapling expanded spending key /// A Sapling expanded spending key
#[derive(Clone)] #[derive(Clone)]
struct ExpandedSpendingKey<E: JubjubEngine> { pub struct ExpandedSpendingKey<E: JubjubEngine> {
ask: E::Fs, ask: E::Fs,
nsk: E::Fs, nsk: E::Fs,
ovk: OutgoingViewingKey, ovk: OutgoingViewingKey,
} }
/// A Sapling full viewing key /// A Sapling full viewing key
struct FullViewingKey<E: JubjubEngine> { pub struct FullViewingKey<E: JubjubEngine> {
vk: ViewingKey<E>, vk: ViewingKey<E>,
ovk: OutgoingViewingKey, ovk: OutgoingViewingKey,
} }
@ -110,17 +110,18 @@ impl<E: JubjubEngine> ExpandedSpendingKey<E> {
}) })
} }
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
self.ask.into_repr().write_le(&mut writer)?;
self.nsk.into_repr().write_le(&mut writer)?;
writer.write_all(&self.ovk.0)?;
Ok(())
}
fn to_bytes(&self) -> [u8; 96] { fn to_bytes(&self) -> [u8; 96] {
let mut result = [0u8; 96]; let mut result = [0u8; 96];
self.ask self.write(&mut result[..])
.into_repr() .expect("should be able to serialize an ExpandedSpendingKey");
.write_le(&mut result[..32])
.expect("length is 32 bytes");
self.nsk
.into_repr()
.write_le(&mut result[32..64])
.expect("length is 32 bytes");
(&mut result[64..]).copy_from_slice(&self.ovk.0);
result result
} }
} }
@ -190,17 +191,18 @@ impl<E: JubjubEngine> FullViewingKey<E> {
}) })
} }
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
self.vk.ak.write(&mut writer)?;
self.vk.nk.write(&mut writer)?;
writer.write_all(&self.ovk.0)?;
Ok(())
}
fn to_bytes(&self) -> [u8; 96] { fn to_bytes(&self) -> [u8; 96] {
let mut result = [0u8; 96]; let mut result = [0u8; 96];
self.vk self.write(&mut result[..])
.ak .expect("should be able to serialize a FullViewingKey");
.write(&mut result[..32])
.expect("length is 32 bytes");
self.vk
.nk
.write(&mut result[32..64])
.expect("length is 32 bytes");
(&mut result[64..]).copy_from_slice(&self.ovk.0);
result result
} }
} }
@ -348,7 +350,7 @@ pub struct ExtendedSpendingKey {
parent_fvk_tag: FVKTag, parent_fvk_tag: FVKTag,
child_index: ChildIndex, child_index: ChildIndex,
chain_code: ChainCode, chain_code: ChainCode,
expsk: ExpandedSpendingKey<Bls12>, pub expsk: ExpandedSpendingKey<Bls12>,
dk: DiversifierKey, dk: DiversifierKey,
} }
@ -358,7 +360,7 @@ pub struct ExtendedFullViewingKey {
parent_fvk_tag: FVKTag, parent_fvk_tag: FVKTag,
child_index: ChildIndex, child_index: ChildIndex,
chain_code: ChainCode, chain_code: ChainCode,
fvk: FullViewingKey<Bls12>, pub fvk: FullViewingKey<Bls12>,
dk: DiversifierKey, dk: DiversifierKey,
} }