[][src]Struct secp256k1::Signature

pub struct Signature {
    pub r: Scalar,
    pub s: Scalar,
}

An ECDSA signature.

Fields

r: Scalars: Scalar

Methods

impl Signature[src]

pub fn parse(p: &[u8; 64]) -> Signature[src]

pub fn parse_slice(p: &[u8]) -> Result<Signature, Error>[src]

pub fn parse_der(p: &[u8]) -> Result<Signature, Error>[src]

pub fn parse_der_lax(p: &[u8]) -> Result<Signature, Error>[src]

Converts a "lax DER"-encoded byte slice to a signature. This is basically only useful for validating signatures in the Bitcoin blockchain from before 2016. It should never be used in new applications. This library does not support serializing to this "format"

pub fn normalize_s(&mut self)[src]

Normalizes a signature to a "low S" form. In ECDSA, signatures are of the form (r, s) where r and s are numbers lying in some finite field. The verification equation will pass for (r, s) iff it passes for (r, -s), so it is possible to ``modify'' signatures in transit by flipping the sign of s. This does not constitute a forgery since the signed message still cannot be changed, but for some applications, changing even the signature itself can be a problem. Such applications require a "strong signature". It is believed that ECDSA is a strong signature except for this ambiguity in the sign of s, so to accommodate these applications libsecp256k1 will only accept signatures for which s is in the lower half of the field range. This eliminates the ambiguity.

However, for some systems, signatures with high s-values are considered valid. (For example, parsing the historic Bitcoin blockchain requires this.) For these applications we provide this normalization function, which ensures that the s value lies in the lower half of its range.

pub fn serialize(&self) -> [u8; 64][src]

pub fn serialize_der(&self) -> SignatureArray[src]

Trait Implementations

impl Clone for Signature[src]

impl Debug for Signature[src]

impl Eq for Signature[src]

impl PartialEq<Signature> for Signature[src]

impl StructuralEq for Signature[src]

impl StructuralPartialEq for Signature[src]

Auto Trait Implementations

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> Same<T> for T[src]

type Output = T

Should always be Self

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,