52 lines
1.9 KiB
Markdown
52 lines
1.9 KiB
Markdown
# Keyfork Derive: BIP-0032 Key Derivation
|
|
|
|
Keyfork offers a [BIP-0032] based hierarchial key derivation system enabling
|
|
the ability to create keys based on a [BIP-0032] seed, a value between 128 to
|
|
512 bits. The keys can be made using any algorithm supported by Keyfork Derive.
|
|
Newtypes can be added to wrap around foreign key types that aren't supported by
|
|
Keyfork.
|
|
|
|
Keys derived with the same parameters, from the same seed, will _always_ return
|
|
the same value. This makes Keyfork a reliable backend for generating encryption
|
|
or signature keys, as every key can be recovered using the previously used
|
|
derivation algorithm. However, this may be seen as a concern, as all an
|
|
attacker may need to recreate all previously-used seeds would be the original
|
|
derivation seed. For this reason, it is recommended to use the Keyfork server
|
|
for derivation from the root seed. The Keyfork server will ensure the root seed
|
|
and any highest-level keys (such as BIP-44, BIP-85, etc.) keys are not leaked.
|
|
|
|
The primary use case of Keyfork Derive will be the creation of Derivation
|
|
Requests, to be used by Keyforkd Client. In the included example, derivation is
|
|
performed directly on a master seed. This is how Keyforkd works internally.
|
|
|
|
## Example
|
|
|
|
```rust
|
|
use std::str::FromStr;
|
|
use keyfork_mnemonic_util::Mnemonic;
|
|
use keyfork_derive_util::{*, request::*};
|
|
|
|
fn main() -> Result<(), Box<dyn std::error::Error>> {
|
|
let mnemonic = Mnemonic::from_str(
|
|
"enter settle kiwi high shift absorb protect sword talent museum lazy okay"
|
|
)?;
|
|
let path = DerivationPath::from_str("m/44'/0'/0'/0/0")?;
|
|
|
|
let request = DerivationRequest::new(
|
|
DerivationAlgorithm::Secp256k1,
|
|
&path
|
|
);
|
|
|
|
let key1 = request.derive_with_mnemonic(&mnemonic)?;
|
|
|
|
let seed = mnemonic.seed(None)?;
|
|
let key2 = request.derive_with_master_seed(seed)?;
|
|
|
|
assert_eq!(key1, key2);
|
|
|
|
Ok(())
|
|
}
|
|
```
|
|
|
|
[BIP-0032]: https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki
|