Struct ed25519_dalek::PublicKey

#[repr(C)]
pub struct PublicKey(_);

An ed25519 public key.

Methods

impl PublicKey

pub fn to_bytes(&self) -> [u8; 32]

Convert this public key to a byte array.

pub fn as_bytes<'a>(&'a self) -> &'a [u8; 32]

View this public key as a byte array.

pub fn from_bytes(bytes: &[u8]) -> Result<PublicKey, SignatureError>

Construct a PublicKey from a slice of bytes.

Warning

The caller is responsible for ensuring that the bytes passed into this method actually represent a curve25519_dalek::curve::CompressedEdwardsY and that said compressed point is actually a point on the curve.

Example

use ed25519_dalek::PublicKey;
use ed25519_dalek::PUBLIC_KEY_LENGTH;
use ed25519_dalek::SignatureError;

let public_key_bytes: [u8; PUBLIC_KEY_LENGTH] = [
   215,  90, 152,   1, 130, 177,  10, 183, 213,  75, 254, 211, 201, 100,   7,  58,
    14, 225, 114, 243, 218, 166,  35,  37, 175,   2,  26, 104, 247,   7,   81, 26];

let public_key = PublicKey::from_bytes(&public_key_bytes)?;

Returns

A Result whose okay value is an EdDSA PublicKey or whose error value is an SignatureError describing the error that occurred.

pub fn from_secret<D>(secret_key: &SecretKey) -> PublicKey where     D: Digest<OutputSize = U64> + Default,

Derive this public key from its corresponding SecretKey.

pub fn from_expanded_secret(     expanded_secret_key: &ExpandedSecretKey ) -> PublicKey

Derive this public key from its corresponding ExpandedSecretKey.

pub fn verify<D>(     &self,     message: &[u8],     signature: &Signature ) -> Result<(), SignatureError> where     D: Digest<OutputSize = U64> + Default,

Verify a signature on a message with this keypair's public key.

Return

Returns Ok(()) if the signature is valid, and Err otherwise.

pub fn verify_prehashed<D>(     &self,     prehashed_message: D,     context: Option<&[u8]>,     signature: &Signature ) -> Result<(), SignatureError> where     D: Digest<OutputSize = U64> + Default,

Verify a signature on a prehashed_message using the Ed25519ph algorithm.

Inputs

• prehashed_message is an instantiated hash digest with 512-bits of output which has had the message to be signed previously fed into its state.
• context is an optional context string, up to 255 bytes inclusive, which may be used to provide additional domain separation. If not set, this will default to an empty string.
• signature is a purported Ed25519ph Signature on the prehashed_message.

Returns

Returns true if the signature was a valid signature created by this Keypair on the prehashed_message.

Trait Implementations

impl Copy for PublicKey

impl Clone for PublicKey

fn clone(&self) -> PublicKey

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for PublicKey

fn default() -> PublicKey

Returns the "default value" for a type.

impl Eq for PublicKey

impl PartialEq for PublicKey

fn eq(&self, other: &PublicKey) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &PublicKey) -> bool

This method tests for !=.

impl Debug for PublicKey

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl From<ExpandedSecretKey> for PublicKey

fn from(source: ExpandedSecretKey) -> PublicKey

Performs the conversion.