arnaucube/ring-signatures-rs
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Add err handling on sign

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arnaucube
2022-07-10 15:42:47 +02:00
parent ae5eb46929
commit a790679b72
1 changed files with 4 additions and 6 deletions
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10
src/lib.rs
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@@ -40,7 +40,7 @@ impl KeyPair {
hash_to_point(self.pk).mul(self.sk.into_repr()) hash_to_point(self.pk).mul(self.sk.into_repr())
} }
pub fn sign(&self, ring: Vec<PublicKey>, m: Vec<u8>) -> Signature { pub fn sign(&self, ring: Vec<PublicKey>, m: Vec<u8>) -> Result<Signature, String> {
let ring_size = ring.len(); let ring_size = ring.len();
// determine pi (the position of signer's public key in R // determine pi (the position of signer's public key in R
let mut pi = 0; let mut pi = 0;
@@ -54,8 +54,7 @@ impl KeyPair {
} }
} }
if !found { if !found {
// error return Err("key not found in the ring".to_string());
println!("key not found in the ring");
} }
let mut rng = ark_std::rand::thread_rng(); let mut rng = ark_std::rand::thread_rng();
@@ -97,7 +96,7 @@ impl KeyPair {
// compute r_pi // compute r_pi
r[pi] = a - c[pi] * self.sk; r[pi] = a - c[pi] * self.sk;
(c[0], r) Ok((c[0], r))
} }
} }
@@ -112,7 +111,6 @@ pub fn verify(
let c1 = sig.0; let c1 = sig.0;
let r = sig.1; let r = sig.1;
if ring_size != r.len() { if ring_size != r.len() {
println!("ERROR"); // TODO
return false; return false;
} }
// TODO check that key_image \in G (EC), by l * key_image == 0 // TODO check that key_image \in G (EC), by l * key_image == 0
@@ -190,7 +188,7 @@ mod tests {
ring[pi] = k_pi.pk; ring[pi] = k_pi.pk;
let m: Vec<u8> = vec![1, 2, 3, 4]; let m: Vec<u8> = vec![1, 2, 3, 4];
let sig = k_pi.sign(ring.clone(), m.clone()); let sig = k_pi.sign(ring.clone(), m.clone()).unwrap();
println!("sig {:?}", sig); println!("sig {:?}", sig);
let key_image = k_pi.key_image(); let key_image = k_pi.key_image();