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Update the sign expiration date function

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This commit is contained in:
aniampio
2023-11-24 15:13:49 +00:00
parent 9a9c48e382
commit e21ccb7f07
1 changed files with 44 additions and 30 deletions
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common/nym_offline_compact_ecash/src/scheme/expiration_date_signatures.rs
+44 -30
View File
@@ -44,28 +44,32 @@ pub fn sign_expiration_date(
) -> Vec<PartialExpirationDateSignature> {
let m0: Scalar = Scalar::from(expiration_date);
let m2: Scalar = Scalar::from_bytes(&constants::TYPE_EXP).unwrap();
// Initialize a vector to collect exp_sign values
let mut exp_signs = Vec::with_capacity(constants::VALIDITY_PERIOD as usize);
exp_signs
.par_iter_mut()
.enumerate()
.for_each(|(l, exp_sign)| {
let m1: Scalar = Scalar::from(expiration_date - constants::VALIDITY_PERIOD + l as u64);
// Compute the hash
let h = hash_g1([m0.to_bytes(), m1.to_bytes(), m2.to_bytes()].concat());
// Sign the attributes by performing scalar-point multiplications and accumulating the result
let mut s_exponent = sk_auth.x;
s_exponent += &sk_auth.ys[0] * m0;
s_exponent += &sk_auth.ys[1] * m1;
s_exponent += &sk_auth.ys[2] * m2;
// Create the signature struct on the expiration date
*exp_sign = PartialExpirationDateSignature {
h,
s: h * s_exponent,
};
});
exp_signs
(0..constants::VALIDITY_PERIOD)
.into_par_iter()
.fold(
Vec::new,
|mut exp_signs, l| {
let m1: Scalar = Scalar::from(expiration_date - constants::VALIDITY_PERIOD + l as u64);
// Compute the hash
let h = hash_g1([m0.to_bytes(), m1.to_bytes(), m2.to_bytes()].concat());
// Sign the attributes by performing scalar-point multiplications and accumulating the result
let mut s_exponent = sk_auth.x;
s_exponent += &sk_auth.ys[0] * m0;
s_exponent += &sk_auth.ys[1] * m1;
s_exponent += &sk_auth.ys[2] * m2;
// Create the signature struct on the expiration date
let exp_sign = PartialExpirationDateSignature {
h,
s: h * s_exponent,
};
exp_signs.push(exp_sign);
exp_signs
},
)
.reduce(Vec::new, |mut v1, mut v2| {
v1.append(&mut v2);
v1
})
}
/// Verifies the expiration date signatures against the given verification key.
@@ -117,6 +121,7 @@ pub fn verify_valid_dates_signatures(
&sig.s.to_affine(),
params.grp().prepared_miller_g2(),
) {
println!("Failed for : {:?}", l);
return Err(CompactEcashError::ExpirationDate(
"Verification of the date signature failed".to_string(),
));
@@ -153,7 +158,7 @@ pub fn verify_valid_dates_signatures(
///
pub fn aggregate_expiration_signatures(
params: &Parameters,
vk_auth: &VerificationKeyAuth,
vk: &VerificationKeyAuth,
expiration_date: u64,
signatures: &[(
u64,
@@ -195,8 +200,8 @@ pub fn aggregate_expiration_signatures(
signatures
.par_iter()
.try_for_each(|(_, vkey, partial_signatures)| {
verify_valid_dates_signatures(params, vkey, partial_signatures, expiration_date)
.try_for_each(|(_, vk_auth, partial_signatures)| {
verify_valid_dates_signatures(params, vk_auth, partial_signatures, expiration_date)
})?;
// Collect the partial signatures for the same valid date
@@ -215,9 +220,10 @@ pub fn aggregate_expiration_signatures(
let aggr_sig = ExpirationDateSignature { h, s: aggr_s };
aggregated_date_signatures.push(aggr_sig);
}
println!("Hello world!");
verify_valid_dates_signatures(
&params,
&vk_auth,
&vk,
&aggregated_date_signatures,
expiration_date,
)?;
@@ -275,8 +281,8 @@ mod tests {
let mut partial_signatures: Vec<Vec<PartialExpirationDateSignature>> =
Vec::with_capacity(constants::VALIDITY_PERIOD as usize);
for sk in secret_keys_authorities.iter() {
let sign = sign_expiration_date(&params, &sk, expiration_date);
for sk_auth in secret_keys_authorities.iter() {
let sign = sign_expiration_date(&params, &sk_auth, expiration_date);
partial_signatures.push(sign);
}
@@ -290,11 +296,19 @@ mod tests {
.map(|(i, (vk, sigs))| (i.clone(), vk.clone(), sigs.clone()))
.collect();
aggregate_expiration_signatures(
let output = aggregate_expiration_signatures(
&params,
&verification_key,
expiration_date,
&combined_data,
);
).unwrap();
println!("{:?}", output);
assert!(aggregate_expiration_signatures(
&params,
&verification_key,
expiration_date,
&combined_data,
).is_ok());
}
}