Struct ed25519_dalek::SecretKey
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#[repr(C)]pub struct SecretKey(_);
An EdDSA secret key.
Methods
impl SecretKey
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fn expand<D>(&self) -> ExpandedSecretKey where
D: Digest<OutputSize = U64> + Default,
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D: Digest<OutputSize = U64> + Default,
Expand this SecretKey
into an ExpandedSecretKey
.
fn to_bytes(&self) -> [u8; 32]
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Convert this secret key to a byte array.
fn as_bytes<'a>(&'a self) -> &'a [u8; 32]
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View this secret key as a byte array.
fn from_bytes(bytes: &[u8]) -> Result<SecretKey, DecodingError>
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Construct a SecretKey
from a slice of bytes.
Example
use ed25519_dalek::SecretKey; use ed25519_dalek::SECRET_KEY_LENGTH; use ed25519_dalek::DecodingError; let secret_key_bytes: [u8; SECRET_KEY_LENGTH] = [ 157, 097, 177, 157, 239, 253, 090, 096, 186, 132, 074, 244, 146, 236, 044, 196, 068, 073, 197, 105, 123, 050, 105, 025, 112, 059, 172, 003, 028, 174, 127, 096, ]; let secret_key: SecretKey = SecretKey::from_bytes(&secret_key_bytes)?;
Returns
A Result
whose okay value is an EdDSA SecretKey
or whose error value
is an DecodingError
wrapping the internal error that occurred.
fn generate(csprng: &mut Rng) -> SecretKey
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Generate a SecretKey
from a csprng
.
Example
extern crate rand; extern crate sha2; extern crate ed25519_dalek; use rand::Rng; use rand::OsRng; use sha2::Sha512; use ed25519_dalek::PublicKey; use ed25519_dalek::SecretKey; use ed25519_dalek::Signature; let mut csprng: OsRng = OsRng::new().unwrap(); let secret_key: SecretKey = SecretKey::generate(&mut csprng);
Afterwards, you can generate the corresponding public—provided you also
supply a hash function which implements the Digest
and Default
traits, and which returns 512 bits of output—via:
let public_key: PublicKey = PublicKey::from_secret::<Sha512>(&secret_key);
The standard hash function used for most ed25519 libraries is SHA-512,
which is available with use sha2::Sha512
as in the example above.
Other suitable hash functions include Keccak-512 and Blake2b-512.
Input
A CSPRNG with a fill_bytes()
method, e.g. the one returned
from rand::OsRng::new()
(in the rand
crate).