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1a036a0b5f
...
48ccd7c68f
Author | SHA1 | Date |
---|---|---|
Ryan Heywood | 48ccd7c68f | |
Ryan Heywood | d04989ef30 |
|
@ -15,7 +15,7 @@
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//! * Derive Key
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//!
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//! ## Extended Private Keys
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//!
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//!
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//! Keyfork doesn't need to be continuously called once a key has been derived. Once an Extended
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//! Private Key (often shortened to "XPrv") has been created, further derivations can be performed.
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//! The tests for this library ensure that all levels of Keyfork derivation beyond the required two
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@ -108,6 +108,10 @@ pub enum Error {
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/// An error encountered in Keyforkd.
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#[error("Error in Keyforkd: {0}")]
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Keyforkd(#[from] KeyforkdError),
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/// An invalid key was returned.
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#[error("Invalid key returned")]
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InvalidKey,
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}
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#[allow(missing_docs)]
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@ -234,11 +238,8 @@ impl Client {
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}
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let depth = path.len() as u8;
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Ok(ExtendedPrivateKey::from_parts(
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&d.data,
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depth,
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d.chain_code,
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))
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ExtendedPrivateKey::from_parts(&d.data, depth, d.chain_code)
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.map_err(|_| Error::InvalidKey)
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}
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_ => Err(Error::InvalidResponse),
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}
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@ -27,6 +27,10 @@ pub enum Error {
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/// The given slice was of an inappropriate size to create a Private Key.
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#[error("The given slice was of an inappropriate size to create a Private Key")]
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InvalidSliceError(#[from] std::array::TryFromSliceError),
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/// The given data was not a valid key for the chosen key type.
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#[error("The given data was not a valid key for the chosen key type")]
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InvalidKey,
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}
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type Result<T, E = Error> = std::result::Result<T, E>;
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@ -127,7 +131,7 @@ mod serde_with {
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let bytes: [u8; 32] = variable_len_bytes.try_into().expect(bug!(
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"unable to parse serialized private key; no support for static len"
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));
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Ok(K::from_bytes(&bytes))
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Ok(K::from_bytes(&bytes).expect(bug!("could not deserialize key with invalid scalar")))
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}
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}
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@ -148,13 +152,9 @@ where
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/// Generate a new [`ExtendedPrivateKey`] from a seed, ideally from a 12-word or 24-word
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/// mnemonic, but may take 16-byte seeds.
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///
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/// # Panics
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/// The method performs unchecked `try_into()` operations on a constant-sized slice.
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///
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/// # Errors
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/// An error may be returned if:
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/// * The given seed had an incorrect length.
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/// * A `HmacSha512` can't be constructed.
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/// The function may return an error if the derived master key could not be parsed as a key for
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/// the given algorithm (such as exceeding values on the secp256k1 curve).
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///
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/// # Examples
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/// ```rust
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@ -167,11 +167,11 @@ where
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed);
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/// ```
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pub fn new(seed: impl as_private_key::AsPrivateKey) -> Self {
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pub fn new(seed: impl as_private_key::AsPrivateKey) -> Result<Self> {
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Self::new_internal(seed.as_private_key())
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}
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fn new_internal(seed: &[u8]) -> Self {
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fn new_internal(seed: &[u8]) -> Result<Self> {
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let hash = HmacSha512::new_from_slice(&K::key().bytes().collect::<Vec<_>>())
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.expect(bug!("HmacSha512 InvalidLength should be infallible"))
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.chain_update(seed)
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@ -179,6 +179,10 @@ where
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.into_bytes();
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let (private_key, chain_code) = hash.split_at(KEY_SIZE / 8);
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// NOTE: Could potentially cause side-channel attacks, but Rust will likely optimize any
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// possible comparison I could make anyways. This is kept as-is for clarity's sake, but can
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// potentially leak information about the first few bytes of a key, such as if they all
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// happen to be zero.
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assert!(
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!private_key.iter().all(|byte| *byte == 0),
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bug!("hmac function returned all-zero master key")
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@ -214,11 +218,16 @@ where
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/// # b"BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB";
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::from_parts(key, 4, *chain_code);
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/// ```
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pub fn from_parts(key: &[u8; 32], depth: u8, chain_code: [u8; 32]) -> Self {
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Self {
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private_key: K::from_bytes(key),
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depth,
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chain_code,
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pub fn from_parts(key: &[u8; 32], depth: u8, chain_code: [u8; 32]) -> Result<Self> {
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match K::from_bytes(key) {
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Ok(key) => {
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Ok(Self {
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private_key: key,
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depth,
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chain_code,
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})
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}
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Err(_) => Err(Error::InvalidKey),
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}
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}
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@ -232,12 +241,15 @@ where
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/// # public_key::TestPublicKey as PublicKey,
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/// # private_key::TestPrivateKey as PrivateKey,
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/// # };
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/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
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/// let key: &[u8; 32] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let chain_code: &[u8; 32] = //
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/// # b"BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB";
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::from_parts(key, 4, *chain_code);
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/// assert_eq!(xprv.private_key(), &PrivateKey::from_bytes(key));
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::from_parts(key, 4, *chain_code)?;
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/// assert_eq!(xprv.private_key(), &PrivateKey::from_bytes(key)?);
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/// # Ok(())
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/// # }
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/// ```
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pub fn private_key(&self) -> &K {
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&self.private_key
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@ -262,7 +274,7 @@ where
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/// # 102, 201, 210, 159, 219, 222, 42, 201, 44, 196, 27,
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/// # 90, 221, 80, 85, 135, 79, 39, 253, 223, 35, 251
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/// # ];
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed);
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed)?;
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/// let xpub = xprv.extended_public_key();
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/// assert_eq!(known_key, xpub.public_key().to_bytes());
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/// # Ok(())
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@ -286,7 +298,7 @@ where
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/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
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/// let seed: &[u8; 64] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed);
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed)?;
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/// let pubkey = xprv.public_key();
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/// # Ok(())
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/// # }
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@ -304,12 +316,15 @@ where
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/// # public_key::TestPublicKey as PublicKey,
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/// # private_key::TestPrivateKey as PrivateKey,
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/// # };
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/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
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/// let key: &[u8; 32] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let chain_code: &[u8; 32] = //
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/// # b"BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB";
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::from_parts(key, 4, *chain_code);
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::from_parts(key, 4, *chain_code)?;
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/// assert_eq!(xprv.depth(), 4);
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/// # Ok(())
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/// # }
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/// ```
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pub fn depth(&self) -> u8 {
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self.depth
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@ -324,12 +339,15 @@ where
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/// # public_key::TestPublicKey as PublicKey,
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/// # private_key::TestPrivateKey as PrivateKey,
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/// # };
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/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
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/// let key: &[u8; 32] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let chain_code: &[u8; 32] = //
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/// # b"BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB";
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::from_parts(key, 4, *chain_code);
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/// let xprv = ExtendedPrivateKey::<PrivateKey>::from_parts(key, 4, *chain_code)?;
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/// assert_eq!(chain_code, &xprv.chain_code());
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/// # Ok(())
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/// # }
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/// ```
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pub fn chain_code(&self) -> [u8; 32] {
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self.chain_code
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@ -351,7 +369,7 @@ where
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/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
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/// let seed: &[u8; 64] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let root_xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed);
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/// let root_xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed)?;
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/// let path = DerivationPath::default()
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/// .chain_push(DerivationIndex::new(44, true)?)
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/// .chain_push(DerivationIndex::new(0, true)?)
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@ -397,7 +415,7 @@ where
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/// # fn main() -> Result<(), Box<dyn std::error::Error>> {
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/// let seed: &[u8; 64] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let root_xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed);
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/// let root_xprv = ExtendedPrivateKey::<PrivateKey>::new(*seed)?;
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/// let bip44_wallet = DerivationPath::default()
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/// .chain_push(DerivationIndex::new(44, true)?)
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/// .chain_push(DerivationIndex::new(0, true)?)
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@ -2,8 +2,6 @@ use crate::PublicKey;
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use thiserror::Error;
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use keyfork_bug::bug;
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pub(crate) type PrivateKeyBytes = [u8; 32];
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/// Functions required to use an `ExtendedPrivateKey`.
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@ -26,7 +24,7 @@ pub trait PrivateKey: Sized {
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let private_key = OurPrivateKey::from_bytes(key_data);
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/// ```
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fn from_bytes(b: &PrivateKeyBytes) -> Self;
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fn from_bytes(b: &PrivateKeyBytes) -> Result<Self, Self::Err>;
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/// Convert a &Self to bytes.
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///
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@ -38,7 +36,7 @@ pub trait PrivateKey: Sized {
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/// # };
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/// let key_data: &[u8; 32] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let private_key = OurPrivateKey::from_bytes(key_data);
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/// let private_key = OurPrivateKey::from_bytes(key_data).unwrap();
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/// assert_eq!(key_data, &private_key.to_bytes());
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/// ```
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fn to_bytes(&self) -> PrivateKeyBytes;
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@ -73,7 +71,7 @@ pub trait PrivateKey: Sized {
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/// # };
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/// let key_data: &[u8; 32] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let private_key = OurPrivateKey::from_bytes(key_data);
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/// let private_key = OurPrivateKey::from_bytes(key_data).unwrap();
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/// let public_key = private_key.public_key();
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/// ```
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fn public_key(&self) -> Self::PublicKey;
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@ -120,8 +118,8 @@ impl PrivateKey for k256::SecretKey {
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"Bitcoin seed"
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}
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fn from_bytes(b: &PrivateKeyBytes) -> Self {
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Self::from_slice(b).expect(bug!("Invalid private key bytes"))
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fn from_bytes(b: &PrivateKeyBytes) -> Result<Self, Self::Err> {
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Self::from_slice(b).map_err(|_| PrivateKeyError::InvalidScalar)
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}
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fn to_bytes(&self) -> PrivateKeyBytes {
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@ -159,8 +157,8 @@ impl PrivateKey for ed25519_dalek::SigningKey {
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"ed25519 seed"
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}
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fn from_bytes(b: &PrivateKeyBytes) -> Self {
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Self::from_bytes(b)
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fn from_bytes(b: &PrivateKeyBytes) -> Result<Self, Self::Err> {
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Ok(Self::from_bytes(b))
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}
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fn to_bytes(&self) -> PrivateKeyBytes {
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@ -204,8 +202,8 @@ impl PrivateKey for TestPrivateKey {
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type PublicKey = TestPublicKey;
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type Err = PrivateKeyError;
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fn from_bytes(b: &PrivateKeyBytes) -> Self {
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Self { key: *b }
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fn from_bytes(b: &PrivateKeyBytes) -> Result<Self, Self::Err> {
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Ok(Self { key: *b })
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}
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fn to_bytes(&self) -> PrivateKeyBytes {
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|
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@ -30,7 +30,7 @@ pub trait PublicKey: Sized {
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/// # };
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/// let key_data: &[u8; 32] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let private_key = OurPrivateKey::from_bytes(key_data);
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/// let private_key = OurPrivateKey::from_bytes(key_data).unwrap();
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/// let public_key_bytes = private_key.public_key().to_bytes();
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/// ```
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fn to_bytes(&self) -> PublicKeyBytes;
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@ -56,7 +56,7 @@ pub trait PublicKey: Sized {
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/// # };
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/// let key_data: &[u8; 32] = //
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/// # b"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
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/// let private_key = OurPrivateKey::from_bytes(key_data);
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/// let private_key = OurPrivateKey::from_bytes(key_data).unwrap();
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/// let fingerprint = private_key.public_key().fingerprint();
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/// ```
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fn fingerprint(&self) -> [u8; 4] {
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|
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@ -70,7 +70,7 @@ impl DerivationAlgorithm {
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match self {
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#[cfg(feature = "ed25519")]
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Self::Ed25519 => {
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let key = ExtendedPrivateKey::<ed25519_dalek::SigningKey>::new(seed);
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let key = ExtendedPrivateKey::<ed25519_dalek::SigningKey>::new(seed)?;
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let derived_key = key.derive_path(path)?;
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Ok(DerivationResponse::with_algo_and_xprv(
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self.clone(),
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@ -79,7 +79,7 @@ impl DerivationAlgorithm {
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}
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#[cfg(feature = "secp256k1")]
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Self::Secp256k1 => {
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let key = ExtendedPrivateKey::<k256::SecretKey>::new(seed);
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let key = ExtendedPrivateKey::<k256::SecretKey>::new(seed)?;
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let derived_key = key.derive_path(path)?;
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Ok(DerivationResponse::with_algo_and_xprv(
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self.clone(),
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@ -87,7 +87,7 @@ impl DerivationAlgorithm {
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))
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}
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Self::TestAlgorithm => {
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let key = ExtendedPrivateKey::<TestPrivateKey>::new(seed);
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let key = ExtendedPrivateKey::<TestPrivateKey>::new(seed)?;
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let derived_key = key.derive_path(path)?;
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Ok(DerivationResponse::with_algo_and_xprv(
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self.clone(),
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@ -300,11 +300,9 @@ mod secp256k1 {
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fn try_from(value: &DerivationResponse) -> Result<Self, Self::Error> {
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match value.algorithm {
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DerivationAlgorithm::Secp256k1 => Ok(Self::from_parts(
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&value.data,
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value.depth,
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value.chain_code,
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)),
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DerivationAlgorithm::Secp256k1 => {
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Self::from_parts(&value.data, value.depth, value.chain_code).map_err(Into::into)
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}
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_ => Err(Self::Error::Algorithm),
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}
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}
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|
@ -335,11 +333,9 @@ mod ed25519 {
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fn try_from(value: &DerivationResponse) -> Result<Self, Self::Error> {
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match value.algorithm {
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DerivationAlgorithm::Ed25519 => Ok(Self::from_parts(
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&value.data,
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value.depth,
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value.chain_code,
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)),
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DerivationAlgorithm::Ed25519 => {
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Self::from_parts(&value.data, value.depth, value.chain_code).map_err(Into::into)
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}
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_ => Err(Self::Error::Algorithm),
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}
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}
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|
|
|
@ -31,7 +31,7 @@ fn secp256k1() {
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// Tests for ExtendedPrivateKey
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let varlen_seed = VariableLengthSeed::new(seed);
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let xkey = ExtendedPrivateKey::<SecretKey>::new(varlen_seed);
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let xkey = ExtendedPrivateKey::<SecretKey>::new(varlen_seed).unwrap();
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let derived_key = xkey.derive_path(&chain).unwrap();
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assert_eq!(
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derived_key.chain_code().as_slice(),
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|
@ -77,7 +77,7 @@ fn ed25519() {
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// Tests for ExtendedPrivateKey
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let varlen_seed = VariableLengthSeed::new(seed);
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let xkey = ExtendedPrivateKey::<SigningKey>::new(varlen_seed);
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let xkey = ExtendedPrivateKey::<SigningKey>::new(varlen_seed).unwrap();
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let derived_key = xkey.derive_path(&chain).unwrap();
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assert_eq!(
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derived_key.chain_code().as_slice(),
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|
@ -110,7 +110,7 @@ fn panics_with_unhardened_derivation() {
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use ed25519_dalek::SigningKey;
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let seed = hex!("000102030405060708090a0b0c0d0e0f");
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let xkey = ExtendedPrivateKey::<SigningKey>::new(seed);
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let xkey = ExtendedPrivateKey::<SigningKey>::new(seed).unwrap();
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xkey.derive_path(&DerivationPath::from_str("m/0").unwrap())
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.unwrap();
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}
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|
@ -122,7 +122,7 @@ fn panics_at_depth() {
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use ed25519_dalek::SigningKey;
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let seed = hex!("000102030405060708090a0b0c0d0e0f");
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let mut xkey = ExtendedPrivateKey::<SigningKey>::new(seed);
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let mut xkey = ExtendedPrivateKey::<SigningKey>::new(seed).unwrap();
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for i in 0..=u32::from(u8::MAX) {
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xkey = xkey
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.derive_child(&DerivationIndex::new(i, true).unwrap())
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|
|
|
@ -259,6 +259,7 @@ impl<P: PromptHandler> Format for OpenPGP<P> {
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let userid = UserID::from("keyfork-sss");
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let path = DerivationPath::from_str("m/7366512'/0'").expect(bug!("valid derivation path"));
|
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let xprv = XPrv::new(seed)
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.expect(bug!("could not create XPrv from key"))
|
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.derive_path(&path)
|
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.expect(bug!("valid derivation"));
|
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keyfork_derive_openpgp::derive(
|
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|
|
|
@ -11,11 +11,12 @@ use keyfork_derive_openpgp::{
|
|||
};
|
||||
use keyfork_derive_util::{DerivationIndex, DerivationPath};
|
||||
use keyfork_prompt::{
|
||||
default_terminal,
|
||||
validators::{SecurePinValidator, Validator},
|
||||
Message, PromptHandler, DefaultTerminal, default_terminal
|
||||
DefaultTerminal, Message, PromptHandler,
|
||||
};
|
||||
|
||||
use keyfork_shard::{Format, openpgp::OpenPGP};
|
||||
use keyfork_shard::{openpgp::OpenPGP, Format};
|
||||
|
||||
#[derive(thiserror::Error, Debug)]
|
||||
#[error("Invalid PIN length: {0}")]
|
||||
|
@ -44,7 +45,9 @@ fn derive_key(seed: [u8; 32], index: u8) -> Result<Cert> {
|
|||
.chain_push(chain)
|
||||
.chain_push(account)
|
||||
.chain_push(subkey);
|
||||
let xprv = XPrv::new(seed).derive_path(&path)?;
|
||||
let xprv = XPrv::new(seed)
|
||||
.expect("could not construct master key from seed")
|
||||
.derive_path(&path)?;
|
||||
let userid = UserID::from(format!("Keyfork Shard {index}"));
|
||||
let cert = keyfork_derive_openpgp::derive(xprv, &subkeys, &userid)?;
|
||||
Ok(cert)
|
||||
|
@ -104,7 +107,7 @@ fn generate_shard_secret(
|
|||
keys_per_shard: u8,
|
||||
output_file: &Option<PathBuf>,
|
||||
) -> Result<()> {
|
||||
let seed = keyfork_entropy::generate_entropy_of_const_size::<{256 / 8}>()?;
|
||||
let seed = keyfork_entropy::generate_entropy_of_const_size::<{ 256 / 8 }>()?;
|
||||
let mut pm = default_terminal()?;
|
||||
let mut certs = vec![];
|
||||
let mut seen_cards: HashSet<String> = HashSet::new();
|
||||
|
@ -171,7 +174,13 @@ fn generate_shard_secret(
|
|||
let output = File::create(output_file)?;
|
||||
opgp.shard_and_encrypt(threshold, certs.len() as u8, &seed, &certs[..], output)?;
|
||||
} else {
|
||||
opgp.shard_and_encrypt(threshold, certs.len() as u8, &seed, &certs[..], std::io::stdout())?;
|
||||
opgp.shard_and_encrypt(
|
||||
threshold,
|
||||
certs.len() as u8,
|
||||
&seed,
|
||||
&certs[..],
|
||||
std::io::stdout(),
|
||||
)?;
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue