/
recovery.rs
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/
recovery.rs
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// Bitcoin secp256k1 bindings
// Written in 2014 by
// Dawid Ciężarkiewicz
// Andrew Poelstra
//
// To the extent possible under law, the author(s) have dedicated all
// copyright and related and neighboring rights to this software to
// the public domain worldwide. This software is distributed without
// any warranty.
//
// You should have received a copy of the CC0 Public Domain Dedication
// along with this software.
// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
//
//! # FFI of the recovery module
use ::types::*;
#[cfg(not(feature = "fuzztarget"))]
use ::{Context, Signature, NonceFn, PublicKey};
/// Library-internal representation of a Secp256k1 signature + recovery ID
#[repr(C)]
pub struct RecoverableSignature([c_uchar; 65]);
impl_array_newtype!(RecoverableSignature, c_uchar, 65);
impl_raw_debug!(RecoverableSignature);
impl RecoverableSignature {
/// Create a new (zeroed) signature usable for the FFI interface
pub fn new() -> RecoverableSignature { RecoverableSignature([0; 65]) }
}
impl Default for RecoverableSignature {
fn default() -> Self {
RecoverableSignature::new()
}
}
#[cfg(not(feature = "fuzztarget"))]
extern "C" {
#[cfg_attr(not(feature = "external-symbols"), link_name = "rustsecp256k1_v0_2_0_ecdsa_recoverable_signature_parse_compact")]
pub fn secp256k1_ecdsa_recoverable_signature_parse_compact(cx: *const Context, sig: *mut RecoverableSignature,
input64: *const c_uchar, recid: c_int)
-> c_int;
#[cfg_attr(not(feature = "external-symbols"), link_name = "rustsecp256k1_v0_2_0_ecdsa_recoverable_signature_serialize_compact")]
pub fn secp256k1_ecdsa_recoverable_signature_serialize_compact(cx: *const Context, output64: *mut c_uchar,
recid: *mut c_int, sig: *const RecoverableSignature)
-> c_int;
#[cfg_attr(not(feature = "external-symbols"), link_name = "rustsecp256k1_v0_2_0_ecdsa_recoverable_signature_convert")]
pub fn secp256k1_ecdsa_recoverable_signature_convert(cx: *const Context, sig: *mut Signature,
input: *const RecoverableSignature)
-> c_int;
#[cfg_attr(not(feature = "external-symbols"), link_name = "rustsecp256k1_v0_2_0_ecdsa_sign_recoverable")]
pub fn secp256k1_ecdsa_sign_recoverable(cx: *const Context,
sig: *mut RecoverableSignature,
msg32: *const c_uchar,
sk: *const c_uchar,
noncefn: NonceFn,
noncedata: *const c_void)
-> c_int;
#[cfg_attr(not(feature = "external-symbols"), link_name = "rustsecp256k1_v0_2_0_ecdsa_recover")]
pub fn secp256k1_ecdsa_recover(cx: *const Context,
pk: *mut PublicKey,
sig: *const RecoverableSignature,
msg32: *const c_uchar)
-> c_int;
}
#[cfg(feature = "fuzztarget")]
mod fuzz_dummy {
extern crate std;
use self::std::ptr;
use super::RecoverableSignature;
use types::*;
use ::{Signature, Context, PublicKey, NonceFn, secp256k1_ec_seckey_verify,
SECP256K1_START_NONE, SECP256K1_START_VERIFY, SECP256K1_START_SIGN};
pub unsafe fn secp256k1_ecdsa_recoverable_signature_parse_compact(_cx: *const Context, _sig: *mut RecoverableSignature,
_input64: *const c_uchar, _recid: c_int)
-> c_int {
unimplemented!();
}
pub unsafe fn secp256k1_ecdsa_recoverable_signature_serialize_compact(_cx: *const Context, _output64: *mut c_uchar,
_recid: *mut c_int, _sig: *const RecoverableSignature)
-> c_int {
unimplemented!();
}
pub unsafe fn secp256k1_ecdsa_recoverable_signature_convert(_cx: *const Context, _sig: *mut Signature,
_input: *const RecoverableSignature)
-> c_int {
unimplemented!();
}
/// Sets sig to (2|3)||msg32||sk
pub unsafe fn secp256k1_ecdsa_sign_recoverable(cx: *const Context,
sig: *mut RecoverableSignature,
msg32: *const c_uchar,
sk: *const c_uchar,
_noncefn: NonceFn,
_noncedata: *const c_void)
-> c_int {
assert!(!cx.is_null() && (*cx).flags() & !(SECP256K1_START_NONE | SECP256K1_START_VERIFY | SECP256K1_START_SIGN) == 0);
assert!((*cx).flags() & SECP256K1_START_SIGN == SECP256K1_START_SIGN);
if secp256k1_ec_seckey_verify(cx, sk) != 1 { return 0; }
if *sk.offset(0) > 0x7f {
(*sig).0[0] = 2;
} else {
(*sig).0[0] = 3;
}
ptr::copy(msg32, (*sig).0[1..33].as_mut_ptr(), 32);
ptr::copy(sk, (*sig).0[33..65].as_mut_ptr(), 32);
1
}
pub unsafe fn secp256k1_ecdsa_recover(_cx: *const Context,
_pk: *mut PublicKey,
_sig: *const RecoverableSignature,
_msg32: *const c_uchar)
-> c_int {
unimplemented!();
}
}
#[cfg(feature = "fuzztarget")]
pub use self::fuzz_dummy::*;