Struct GlobalContext

pub struct GlobalContext { /* private fields */ }

Proxy struct for global SECP256K1 context.

Methods from Deref<Target = Secp256k1<All>>

pub fn sign_ecdsa(&self, msg: &Message, sk: &SecretKey) -> Signature

Constructs a signature for msg using the secret key sk and RFC6979 nonce Requires a signing-capable context.

pub fn sign_ecdsa_with_noncedata( &self, msg: &Message, sk: &SecretKey, noncedata: &[u8; 32], ) -> Signature

Constructs a signature for msg using the secret key sk and RFC6979 nonce and includes 32 bytes of noncedata in the nonce generation via inclusion in one of the hash operations during nonce generation. This is useful when multiple signatures are needed for the same Message and SecretKey while still using RFC6979. Requires a signing-capable context.

pub fn sign_ecdsa_grind_r( &self, msg: &Message, sk: &SecretKey, bytes_to_grind: usize, ) -> Signature

Constructs a signature for msg using the secret key sk, RFC6979 nonce and “grinds” the nonce by passing extra entropy if necessary to produce a signature that is less than 71 - bytes_to_grind bytes. The number of signing operation performed by this function is exponential in the number of bytes grinded. Requires a signing capable context.

pub fn sign_ecdsa_low_r(&self, msg: &Message, sk: &SecretKey) -> Signature

Constructs a signature for msg using the secret key sk, RFC6979 nonce and “grinds” the nonce by passing extra entropy if necessary to produce a signature that is less than 71 bytes and compatible with the low r signature implementation of bitcoin core. In average, this function will perform two signing operations. Requires a signing capable context.

pub fn verify_ecdsa( &self, msg: &Message, sig: &Signature, pk: &PublicKey, ) -> Result<(), Error>

Checks that sig is a valid ECDSA signature for msg using the public key pubkey. Returns Ok(()) on success. Note that this function cannot be used for Bitcoin consensus checking since there may exist signatures which OpenSSL would verify but not libsecp256k1, or vice-versa. Requires a verify-capable context.

let message = Message::from_digest_slice(&[0xab; 32]).expect("32 bytes");
let sig = secp.sign_ecdsa(&message, &secret_key);
assert_eq!(secp.verify_ecdsa(&message, &sig, &public_key), Ok(()));

let message = Message::from_digest_slice(&[0xcd; 32]).expect("32 bytes");
assert_eq!(secp.verify_ecdsa(&message, &sig, &public_key), Err(Error::IncorrectSignature));

pub fn sign_schnorr(&self, msg: &[u8], keypair: &Keypair) -> Signature

Creates a schnorr signature internally using the rand::rngs::ThreadRng random number generator to generate the auxiliary random data.

pub fn sign_schnorr_no_aux_rand( &self, msg: &[u8], keypair: &Keypair, ) -> Signature

Creates a schnorr signature without using any auxiliary random data.

pub fn sign_schnorr_with_aux_rand( &self, msg: &[u8], keypair: &Keypair, aux_rand: &[u8; 32], ) -> Signature

Creates a schnorr signature using the given auxiliary random data.

pub fn sign_schnorr_with_rng<R>( &self, msg: &[u8], keypair: &Keypair, rng: &mut R, ) -> Signature

where R: Rng + CryptoRng,

Creates a schnorr signature using the given random number generator to generate the auxiliary random data.

pub fn verify_schnorr( &self, sig: &Signature, msg: &[u8], pubkey: &XOnlyPublicKey, ) -> Result<(), Error>

Verifies a schnorr signature.

pub fn ctx(&self) -> NonNull<Context>

Getter for the raw pointer to the underlying secp256k1 context. This shouldn’t be needed with normal usage of the library. It enables extending the Secp256k1 with more cryptographic algorithms outside of this crate.

pub fn generate_keypair<R>(&self, rng: &mut R) -> (SecretKey, PublicKey)

where R: Rng + ?Sized,

Generates a random keypair. Convenience function for SecretKey::new and PublicKey::from_secret_key.

Trait Implementations

impl Clone for GlobalContext

fn clone(&self) -> GlobalContext

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for GlobalContext

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

Formats the value using the given formatter.

impl Deref for GlobalContext

type Target = Secp256k1<All>

The resulting type after dereferencing.

fn deref(&self) -> &<GlobalContext as Deref>::Target

Dereferences the value.

impl Copy for GlobalContext