Crate ffi

secp256k1-sys FFI bindings

Direct bindings to the underlying C library functions. These should not be needed for most users.

Modules

recovery

FFI of the recovery module

types

Macros

impl_array_newtype

Implement methods and traits for types that contain an inner array.

impl_raw_debug

Structs

Context

A Secp256k1 context, containing various precomputed values and such needed to do elliptic curve computations. If you create one of these with secp256k1_context_create you MUST destroy it with secp256k1_context_destroy, or else you will have a memory leak.

ElligatorSwift

Library-internal representation of a ElligatorSwift encoded group element.

Keypair

PublicKey

Library-internal representation of a Secp256k1 public key

SchnorrSigExtraParams

Data structure that contains additional arguments for schnorrsig_sign_custom.

Signature

Library-internal representation of a Secp256k1 signature

XOnlyPublicKey

Constants

SECP256K1_SER_COMPRESSED

Flag for keys to indicate compressed serialization format

SECP256K1_SER_UNCOMPRESSED

Flag for keys to indicate uncompressed serialization format

SECP256K1_START_NONE

Flag for context to enable no precomputation

SECP256K1_START_SIGN

Flag for context to enable signing precomputation

SECP256K1_START_VERIFY

Flag for context to enable verification precomputation

Statics

secp256k1_context_no_precomp

secp256k1_ecdh_hash_function_default

Default ECDH hash function

secp256k1_ellswift_xdh_hash_function_bip324

Default ECDH hash function for BIP324 key establishment

secp256k1_nonce_function_bip340

secp256k1_nonce_function_default

secp256k1_nonce_function_rfc6979

Traits

CPtr

A trait for producing pointers that will always be valid in C (assuming NULL pointer is a valid no-op).

Functions

ecdsa_signature_parse_der_lax^⚠

non_secure_erase_impl

Does a best attempt at secure erasure using Rust intrinsics.

rustsecp256k1_v0_10_0_context_create^⚠

A reimplementation of the C function secp256k1_context_create in rust.

rustsecp256k1_v0_10_0_context_destroy^⚠

rustsecp256k1_v0_10_0_default_error_callback_fn^⚠

This function is an override for the C function, this is the an edited version of the original description:

rustsecp256k1_v0_10_0_default_illegal_callback_fn^⚠

This function is an override for the C function, this is the an edited version of the original description:

secp256k1_context_create^⚠

A reimplementation of the C function secp256k1_context_create in rust.

secp256k1_context_destroy^⚠

A reimplementation of the C function secp256k1_context_destroy in rust.

secp256k1_context_preallocated_clone^⚠

secp256k1_context_preallocated_clone_size^⚠

secp256k1_context_preallocated_create^⚠

secp256k1_context_preallocated_destroy^⚠

secp256k1_context_preallocated_size^⚠

secp256k1_context_randomize^⚠

secp256k1_ec_pubkey_cmp^⚠

secp256k1_ec_pubkey_combine^⚠

secp256k1_ec_pubkey_create^⚠

secp256k1_ec_pubkey_negate^⚠

secp256k1_ec_pubkey_parse^⚠

secp256k1_ec_pubkey_serialize^⚠

secp256k1_ec_pubkey_tweak_add^⚠

secp256k1_ec_pubkey_tweak_mul^⚠

secp256k1_ec_seckey_negate^⚠

secp256k1_ec_seckey_tweak_add^⚠

secp256k1_ec_seckey_tweak_mul^⚠

secp256k1_ec_seckey_verify^⚠

secp256k1_ecdh^⚠

secp256k1_ecdsa_sign^⚠

secp256k1_ecdsa_signature_normalize^⚠

secp256k1_ecdsa_signature_parse_compact^⚠

secp256k1_ecdsa_signature_parse_der^⚠

secp256k1_ecdsa_signature_serialize_compact^⚠

secp256k1_ecdsa_signature_serialize_der^⚠

secp256k1_ecdsa_verify^⚠

secp256k1_ellswift_create^⚠

secp256k1_ellswift_decode^⚠

secp256k1_ellswift_encode^⚠

secp256k1_ellswift_xdh^⚠

secp256k1_keypair_create^⚠

secp256k1_keypair_pub^⚠

secp256k1_keypair_sec^⚠

secp256k1_keypair_xonly_pub^⚠

secp256k1_keypair_xonly_tweak_add^⚠

secp256k1_schnorrsig_sign^⚠

secp256k1_schnorrsig_sign_custom^⚠

secp256k1_schnorrsig_verify^⚠

secp256k1_xonly_pubkey_cmp^⚠

secp256k1_xonly_pubkey_from_pubkey^⚠

secp256k1_xonly_pubkey_parse^⚠

secp256k1_xonly_pubkey_serialize^⚠

secp256k1_xonly_pubkey_tweak_add^⚠

secp256k1_xonly_pubkey_tweak_add_check^⚠

Type Aliases

EcdhHashFn

Hash function to use to post-process an ECDH point to get a shared secret.

EllswiftEcdhHashFn

A hash function used by ellswift_ecdh to hash the final ECDH shared secret.

NonceFn

A nonce generation function. Ordinary users of the library never need to see this type; only if you need to control nonce generation do you need to use it. I have deliberately made this hard to do: you have to write your own wrapper around the FFI functions to use it. And it’s an unsafe type. Nonces are generated deterministically by RFC6979 by default; there should be no need to ever change this.

SchnorrNonceFn

Same as secp256k1_nonce function with the exception of accepting an additional pubkey argument and not requiring an attempt argument. The pubkey argument can protect signature schemes with key-prefixed challenge hash inputs against reusing the nonce when signing with the wrong precomputed pubkey.