vexahub/voprf-vx
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Adding deserialization checks (#10)

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This commit is contained in:
Kevin Lewi
2021-09-27 18:29:08 -07:00
committed by GitHub
parent 0445a9461c
commit f6f85e0a25
11 changed files with 155 additions and 55 deletions
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src/voprf.rs
+4 -5
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@@ -528,8 +528,8 @@ fn blind<CS: CipherSuite, R: RngCore + CryptoRng>(
// Choose a random scalar that must be non-zero
let blind = <CS::Group as Group>::random_nonzero_scalar(blinding_factor_rng);
let dst = [STR_HASH_TO_GROUP, &get_context_string::<CS>(mode)?].concat();
let mapped_point = <CS::Group as Group>::map_to_curve::<CS::Hash>(input, &dst)?;
let blinded_element = mapped_point * &blind;
let hashed_point = <CS::Group as Group>::hash_to_curve::<CS::Hash>(input, &dst)?;
let blinded_element = hashed_point * &blind;
Ok((blind, blinded_element))
}
@@ -744,7 +744,6 @@ fn get_context_string<CS: CipherSuite>(mode: Mode) -> Result<alloc::vec::Vec<u8>
// Tests //
// ===== //
///////////
#[cfg(test)]
mod tests {
use super::*;
@@ -770,7 +769,7 @@ mod tests {
&get_context_string::<Ristretto255Sha512>(Mode::Base).unwrap(),
]
.concat();
let point = RistrettoPoint::map_to_curve::<Sha512>(input, &dst).unwrap();
let point = RistrettoPoint::hash_to_curve::<Sha512>(input, &dst).unwrap();
let scalar =
RistrettoPoint::from_scalar_slice(GenericArray::from_slice(&oprf_key[..])).unwrap();
@@ -842,7 +841,7 @@ mod tests {
&get_context_string::<Ristretto255Sha512>(Mode::Base).unwrap(),
]
.concat();
let point = RistrettoPoint::map_to_curve::<Sha512>(&input, &dst).unwrap();
let point = RistrettoPoint::hash_to_curve::<Sha512>(&input, &dst).unwrap();
let res2 = finalize_after_unblind::<Ristretto255Sha512>(
&[(input.to_vec(), point)],
info,