Expand description
A minimal RedJubjub implementation for use in Zebra.
Two parameterizations of RedJubjub are used in Zcash, one for
BindingSig
and one for SpendAuthSig
. This library distinguishes
these in the type system, using the sealed SigType
trait as a
type-level enum.
In addition to the Signature
, SigningKey
, VerificationKey
types,
the library also provides VerificationKeyBytes
, a refinement of a
[u8; 32]
indicating that bytes represent an encoding of a RedJubjub
verification key. This allows the VerificationKey
type to cache
verification checks related to the verification key encoding.
Examples
Creating a BindingSig
, serializing and deserializing it, and
verifying the signature:
use rand::thread_rng;
use redjubjub::*;
let msg = b"Hello!";
// Generate a secret key and sign the message
let sk = SigningKey::<Binding>::new(thread_rng());
let sig = sk.sign(thread_rng(), msg);
// Types can be converted to raw byte arrays using From/Into
let sig_bytes: [u8; 64] = sig.into();
let pk_bytes: [u8; 32] = VerificationKey::from(&sk).into();
// Deserialize and verify the signature.
let sig: Signature<Binding> = sig_bytes.into();
assert!(
VerificationKey::try_from(pk_bytes)
.and_then(|pk| pk.verify(msg, &sig))
.is_ok()
);
docs
cargo doc --features "nightly" --open
Modules
- Performs batch RedJubjub signature verification.
Structs
- A RedJubJub signature.
- A RedJubJub signing key.
- A valid RedJubJub verification key.
- A refinement type for
[u8; 32]
indicating that the bytes represent an encoding of a RedJubJub verification key.
Enums
- A type variable corresponding to Zcash’s
BindingSig
. - An error related to RedJubJub signatures.
- A type variable corresponding to Zcash’s
SpendAuthSig
.
Traits
Type Definitions
- An element of the JubJub scalar field used for randomization of public and secret keys.