Expose Schnorr sign/verify

This commit is contained in:
Andrew Poelstra 2015-12-15 12:47:07 -06:00
parent 9a91b69fad
commit 8aa2569818
4 changed files with 27 additions and 6 deletions

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@ -39,6 +39,7 @@ fn main() {
.define("USE_ENDOMORPHISM", Some("1"))
// These all are OK.
.define("ENABLE_MODULE_ECDH", Some("1"))
.define("ENABLE_MODULE_SCHNORR", Some("1"))
.define("ENABLE_MODULE_RECOVERY", Some("1"));
// secp256k1

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@ -35,6 +35,9 @@ pub const COMPRESSED_PUBLIC_KEY_SIZE: usize = 33;
/// The maximum size of a signature
pub const MAX_SIGNATURE_SIZE: usize = 72;
/// The size of a Schnorr signature
pub const SCHNORR_SIGNATURE_SIZE: usize = 64;
/// The maximum size of a compact signature
pub const COMPACT_SIGNATURE_SIZE: usize = 64;

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@ -198,6 +198,27 @@ extern "C" {
msg32: *const c_uchar)
-> c_int;
// Schnorr
pub fn secp256k1_schnorr_sign(cx: *const Context,
sig64: *mut c_uchar,
msg32: *const c_uchar,
sk: *const c_uchar,
noncefn: NonceFn,
noncedata: *const c_void)
-> c_int;
pub fn secp256k1_schnorr_verify(cx: *const Context,
sig64: *const c_uchar,
msg32: *const c_uchar,
pk: *const PublicKey)
-> c_int;
pub fn secp256k1_schnorr_recover(cx: *const Context,
pk: *mut PublicKey,
sig64: *const c_uchar,
msg32: *const c_uchar)
-> c_int;
// EC
pub fn secp256k1_ec_seckey_verify(cx: *const Context,
sk: *const c_uchar) -> c_int;

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@ -53,6 +53,7 @@ pub mod constants;
pub mod ecdh;
pub mod ffi;
pub mod key;
pub mod schnorr;
/// A tag used for recovering the public key from a compact signature
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
@ -489,8 +490,7 @@ impl Secp256k1 {
}
/// Determines the public key for which `sig` is a valid signature for
/// `msg`. Returns through the out-pointer `pubkey`. Requires a verify-capable
/// context.
/// `msg`. Requires a verify-capable context.
pub fn recover(&self, msg: &Message, sig: &RecoverableSignature)
-> Result<key::PublicKey, Error> {
if self.caps == ContextFlag::SignOnly || self.caps == ContextFlag::None {
@ -585,12 +585,8 @@ mod tests {
// Try pk recovery
assert_eq!(none.recover(&msg, &sigr), Err(IncapableContext));
assert_eq!(none.recover(&msg, &sigr), Err(IncapableContext));
assert_eq!(sign.recover(&msg, &sigr), Err(IncapableContext));
assert_eq!(sign.recover(&msg, &sigr), Err(IncapableContext));
assert!(vrfy.recover(&msg, &sigr).is_ok());
assert!(vrfy.recover(&msg, &sigr).is_ok());
assert!(full.recover(&msg, &sigr).is_ok());
assert!(full.recover(&msg, &sigr).is_ok());
assert_eq!(vrfy.recover(&msg, &sigr),