61 lines
1.7 KiB
Rust
61 lines
1.7 KiB
Rust
// -*- mode: rust; -*-
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//
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// This file is part of frost-ristretto.
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// Copyright (c) 2019-2021 Zcash Foundation
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// See LICENSE for licensing information.
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//
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// Authors:
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// - Henry de Valence <hdevalence@hdevalence.ca>
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// - Deirdre Connolly <durumcrustulum@gmail.com>
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//! Schnorr signatures on the Ristretto group
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/// A Schnorr signature on the Ristretto group.
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#[derive(Copy, Clone, Eq, PartialEq)]
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#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
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pub struct Signature {
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pub(crate) R_bytes: [u8; 32],
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pub(crate) z_bytes: [u8; 32],
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}
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impl std::fmt::Debug for Signature {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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f.debug_struct("Signature")
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.field("R", &hex::encode(self.R_bytes))
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.field("z", &hex::encode(self.z_bytes))
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.finish()
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}
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}
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impl From<[u8; 64]> for Signature {
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fn from(bytes: [u8; 64]) -> Signature {
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let mut R_bytes = [0; 32];
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R_bytes.copy_from_slice(&bytes[0..32]);
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let mut z_bytes = [0; 32];
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z_bytes.copy_from_slice(&bytes[32..64]);
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Signature { R_bytes, z_bytes }
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}
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}
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impl From<Signature> for [u8; 64] {
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fn from(sig: Signature) -> [u8; 64] {
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let mut bytes = [0; 64];
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bytes[0..32].copy_from_slice(&sig.R_bytes[..]);
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bytes[32..64].copy_from_slice(&sig.z_bytes[..]);
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bytes
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}
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}
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impl hex::FromHex for Signature {
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type Error = &'static str;
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fn from_hex<T: AsRef<[u8]>>(hex: T) -> Result<Self, Self::Error> {
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let mut bytes = [0u8; 64];
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match hex::decode_to_slice(hex, &mut bytes[..]) {
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Ok(()) => Ok(Self::from(bytes)),
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Err(_) => Err("invalid hex"),
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}
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}
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}
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