[][src]Struct secp256k1::Signature

pub struct Signature(_);

An ECDSA signature


impl Signature[src]

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

Converts a DER-encoded byte slice to a signature

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

Converts a 64-byte compact-encoded byte slice to a signature

pub fn from_der_lax(data: &[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 as_ptr(&self) -> *const Signature[src]

Obtains a raw pointer suitable for use with FFI functions

pub fn as_mut_ptr(&mut self) -> *mut Signature[src]

Obtains a raw mutable pointer suitable for use with FFI functions

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

Serializes the signature in DER format

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

Serializes the signature in compact format

Trait Implementations

impl From<Signature> for Signature[src]

Creates a new signature from a FFI signature

impl Clone for Signature[src]

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl PartialEq<Signature> for Signature[src]

impl Eq for Signature[src]

impl Copy for Signature[src]

impl Display for Signature[src]

impl Debug for Signature[src]

impl FromStr for Signature[src]

type Err = Error

The associated error which can be returned from parsing.

impl CPtr for Signature[src]

type Target = Signature

Auto Trait Implementations

impl Unpin for Signature

impl Sync for Signature

impl Send for Signature

impl UnwindSafe for Signature

impl RefUnwindSafe for Signature

Blanket Implementations

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

impl<T> ToString for T where
    T: Display + ?Sized

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

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

The type returned in the event of a conversion error.

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<T> Borrow<T> for T where
    T: ?Sized

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