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rust-secp256k1-unsafe-fast
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ffi: make function types nullable

This commit is contained in:
Andrew Poelstra 2020-12-22 21:17:31 +00:00
parent 91eea119b3
commit 40c31342f2
2 changed files with 13 additions and 12 deletions
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13
secp256k1-sys/src/lib.rs
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@ -58,36 +58,37 @@ pub const SECP256K1_SER_COMPRESSED: c_uint = (1 << 1) | (1 << 8);
/// around the FFI functions to use it. And it's an unsafe type. /// around the FFI functions to use it. And it's an unsafe type.
/// Nonces are generated deterministically by RFC6979 by /// Nonces are generated deterministically by RFC6979 by
/// default; there should be no need to ever change this. /// default; there should be no need to ever change this.
pub type NonceFn = unsafe extern "C" fn(nonce32: *mut c_uchar, pub type NonceFn = Option<unsafe extern "C" fn(
nonce32: *mut c_uchar,
msg32: *const c_uchar, msg32: *const c_uchar,
key32: *const c_uchar, key32: *const c_uchar,
algo16: *const c_uchar, algo16: *const c_uchar,
data: *mut c_void, data: *mut c_void,
attempt: c_uint, attempt: c_uint,
) -> c_int; ) -> c_int>;
/// Hash function to use to post-process an ECDH point to get /// Hash function to use to post-process an ECDH point to get
/// a shared secret. /// a shared secret.
pub type EcdhHashFn = unsafe extern "C" fn( pub type EcdhHashFn = Option<unsafe extern "C" fn(
output: *mut c_uchar, output: *mut c_uchar,
x: *const c_uchar, x: *const c_uchar,
y: *const c_uchar, y: *const c_uchar,
data: *mut c_void, data: *mut c_void,
) -> c_int; ) -> c_int>;
/// Same as secp256k1_nonce function with the exception of accepting an /// Same as secp256k1_nonce function with the exception of accepting an
/// additional pubkey argument and not requiring an attempt argument. The pubkey /// additional pubkey argument and not requiring an attempt argument. The pubkey
/// argument can protect signature schemes with key-prefixed challenge hash /// argument can protect signature schemes with key-prefixed challenge hash
/// inputs against reusing the nonce when signing with the wrong precomputed /// inputs against reusing the nonce when signing with the wrong precomputed
/// pubkey. /// pubkey.
pub type SchnorrNonceFn = unsafe extern "C" fn( pub type SchnorrNonceFn = Option<unsafe extern "C" fn(
nonce32: *mut c_uchar, nonce32: *mut c_uchar,
msg32: *const c_uchar, msg32: *const c_uchar,
key32: *const c_uchar, key32: *const c_uchar,
xonly_pk32: *const c_uchar, xonly_pk32: *const c_uchar,
algo16: *const c_uchar, algo16: *const c_uchar,
data: *mut c_void, data: *mut c_void,
) -> c_int; ) -> c_int>;
/// A Secp256k1 context, containing various precomputed values and such /// A Secp256k1 context, containing various precomputed values and such
/// needed to do elliptic curve computations. If you create one of these /// needed to do elliptic curve computations. If you create one of these

2
src/ecdh.rs
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@ -151,7 +151,7 @@ impl SharedSecret {
xy.as_mut_ptr(), xy.as_mut_ptr(),
point.as_ptr(), point.as_ptr(),
scalar.as_ptr(), scalar.as_ptr(),
c_callback, Some(c_callback),
ptr::null_mut(), ptr::null_mut(),
) )
}; };