Struct Signature 

pub struct Signature(/* private fields */);

A BLS signature.

Signatures are created by signing a message with a SecretKey and can be verified using the corresponding PublicKey.

Example

use threshold_pairing::{SecretKey, Signature, SIG_SIZE};

let sk = SecretKey::random();
let pk = sk.public_key();

let sig = sk.sign(b"message");
assert!(pk.verify(&sig, b"message"));

// Serialize and deserialize
let bytes: [u8; SIG_SIZE] = sig.to_bytes();
let sig2 = Signature::from_bytes(&bytes).unwrap();
assert_eq!(sig, sig2);

Implementations

impl Signature

pub fn parity(&self) -> bool

Returns true if the signature contains an odd number of ones.

pub fn from_bytes<B: Borrow<[u8; 96]>>(bytes: B) -> FromBytesResult<Self>

Returns the signature with the given representation, if valid.

The from_compressed method performs full validation including subgroup checks to prevent small subgroup attacks.

Errors

Returns FromBytesError::Invalid if:

• The bytes do not represent a valid compressed G2 point
• The point is not on the curve
• The point is not in the correct subgroup

Example

use threshold_pairing::{SecretKey, Signature, SIG_SIZE};

let sk = SecretKey::random();
let sig = sk.sign(b"message");

// Round-trip through bytes
let bytes: [u8; SIG_SIZE] = sig.to_bytes();
let sig2 = Signature::from_bytes(&bytes).expect("valid bytes");
assert_eq!(sig, sig2);

pub fn to_bytes(&self) -> [u8; 96]

Returns a byte string representation of the signature.

Trait Implementations

impl Clone for Signature

fn clone(&self) -> Signature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Signature

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Signature

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Signature

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

Formats the value using the given formatter.

impl Distribution<Signature> for Standard

fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> Signature

Generate a random value of T, using rng as the source of randomness.

fn sample_iter<R>(self, rng: R) -> DistIter<Self, R, T>

where R: Rng, Self: Sized,

Create an iterator that generates random values of T, using rng as the source of randomness.

fn map<F, S>(self, func: F) -> DistMap<Self, F, T, S>

where F: Fn(T) -> S, Self: Sized,

Create a distribution of values of ‘S’ by mapping the output of Self through the closure F

impl Hash for Signature

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl LowerHex for Signature

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

Formats the value using the given formatter.

impl Ord for Signature

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Signature

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Signature

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Signature

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<&[u8; 96]> for Signature

type Error = FromBytesError

The type returned in the event of a conversion error.

fn try_from(bytes: &[u8; 96]) -> FromBytesResult<Self>

Performs the conversion.

impl TryFrom<[u8; 96]> for Signature

type Error = FromBytesError

The type returned in the event of a conversion error.

fn try_from(bytes: [u8; 96]) -> FromBytesResult<Self>

Performs the conversion.

impl UpperHex for Signature

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

Formats the value using the given formatter.

impl Eq for Signature

impl StructuralPartialEq for Signature