remove extra files, continue rename process

The previously existing polynomial coefficients had an inverse bias
towards `0`, only starting higher than `1`. This allows `0` to be a
valid polynomial.

As per an audit performed by Cure53:

> The correct method to select a random polynomial would be to select
all coefficients (including the most significant coefficient) uniformly
in the range 0..255 (inclusive). Otherwise, knowledge that a coefficient
in a polynomial cannot be 0 permits the exclusion of single byte values
for the shared secret given one share less than required. [...]
Exploiting this weakness necessitates sharing the same secret multiple
times. In this scenario, an attacker could exclude an exponential number
of values for each of the shared bytes until sufficiently few values
remain for brute forcing.  Cure53 estimates that under ideal
circumstances (e.g., a 2-out-of-N scheme) a shared secret can be
reconstructed if the same secret has been distributed 500-1500 times.

CHANGELOG.md

@@ -4,6 +4,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.6.0] - 2024-11-16
+### Changed
+- Rename project to `blahaj` following soft-fork
+- Use `u8::MAX` instead of deprecated `u8::max_value()`
+- Upgraded project dependencies
+
+### Fixed
+- Lower bound of polynomial coefficients changed from 1 to 0
+
 ## [0.5.0] - 2021-03-14
 ### Added
 - Zeroize memory on drop for generated secret shares

COPYRIGHT

@@ -1,12 +1,11 @@
-Copyrights in the Sharks project are retained by their contributors. No
-copyright assignment is required to contribute to the Sharks project.
+Copyrights in the Blahaj project are retained by their contributors. No
+copyright assignment is required to contribute to the Blahaj project.
 
 For full authorship information, see the version control history.
 
 Except as otherwise noted (below and/or in individual files), Sharks is
-licensed under the Apache License, Version 2.0 <LICENSE-APACHE> or
-<http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-<LICENSE-MIT> or <http://opensource.org/licenses/MIT>, at your option.
+licensed under the MIT license <LICENSE-MIT> or
+<http://opensource.org/licenses/MIT>.
 
-The Sharks project includes code from the Rust project
-published under these same licenses.
+The Blahaj project includes code from the Rust project published under these
+same licenses.

Cargo.toml

@@ -1,21 +1,16 @@
 [package]
-name = "sharks"
-version = "0.5.0"
-authors = ["Aitor Ruano <codearm@pm.me>"]
-description = "Fast, small and secure Shamir's Secret Sharing library crate"
-homepage = "https://github.com/c0dearm/sharks"
-repository = "https://github.com/c0dearm/sharks"
+name = "blahaj"
+version = "0.6.0"
+authors = ["Ryan Heywood <ryan@distrust.co>"]
+description = "Fast, small, and secure Shamir's Secret Sharing"
+homepage = "https://git.distrust.co/public/blahaj"
+repository = "https://git.distrust.co/public/blahaj"
 readme = "README.md"
-keywords = ["shamir", "secret", "sharing", "share", "crypto"]
+keywords = ["shamir", "secret", "sharing", "share", "cryptography"]
 categories = ["algorithms", "cryptography", "mathematics"]
-license = "MIT/Apache-2.0"
-edition = "2018"
+license = "MIT"
+edition = "2021"
 
-[badges]
-maintenance = { status = "actively-developed" }
-codecov = { repository = "c0dearm/sharks" }
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [features]
 default = ["std", "zeroize_memory"]
 std = ["rand/std", "rand/std_rng"]
@@ -24,7 +19,7 @@ zeroize_memory = ["zeroize"]
 
 [dependencies]
 rand = { version = "0.8", default-features = false }
-hashbrown = "0.9"
+hashbrown = "0.15"
 arbitrary = { version = "0.4.7", features = ["derive"], optional = true }
 zeroize = { version = "1.2.0", features = ["zeroize_derive"], optional = true }
 

LICENSE-APACHE

@@ -1,201 +0,0 @@
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-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
-
-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
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-      liable to You for damages, including any direct, indirect, special,
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-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
-
-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
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-      file or class name and description of purpose be included on the
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-   Copyright 2020 Aitor Ruano Miralles
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README.md

@@ -1,15 +1,12 @@
-# Sharks
+# Blahaj
 
-[![Rust](https://github.com/c0dearm/sharks/workflows/Rust/badge.svg?branch=master)](https://github.com/c0dearm/sharks/actions)
-[![Crates](https://img.shields.io/crates/v/sharks.svg)](https://crates.io/crates/sharks)
-[![Docs](https://docs.rs/sharks/badge.svg)](https://docs.rs/sharks)
-[![Codecov](https://codecov.io/gh/c0dearm/sharks/branch/master/graph/badge.svg)](https://codecov.io/gh/c0dearm/sharks)
-[![License](https://camo.githubusercontent.com/47069b7e06b64b608c692a8a7f40bc6915cf629c/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d417061636865322e302532464d49542d626c75652e737667)](https://github.com/c0dearm/sharks/blob/master/COPYRIGHT)
+[![Crates](https://img.shields.io/crates/v/blahaj.svg)](https://crates.io/crates/blahaj)
+[![Docs](https://docs.rs/blahaj/badge.svg)](https://docs.rs/blahaj)
 
 Fast, small and secure [Shamir's Secret Sharing](https://en.wikipedia.org/wiki/Shamir%27s_Secret_Sharing) library crate
 
 Documentation:
--    [API reference (docs.rs)](https://docs.rs/sharks)
+-    [API reference (docs.rs)](https://docs.rs/blahaj)
 
 ## Usage
 
@@ -17,17 +14,17 @@ Add this to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-sharks = "0.4"
+blahaj = "0.6"
 ```
 
 If your environment doesn't support `std`:
 
 ```toml
 [dependencies]
-sharks = { version = "0.4", default-features = false }
+blahaj = { version = "0.6", default-features = false }
 ```
 
-To get started using Sharks, see the [Rust docs](https://docs.rs/sharks)
+To get started using Blahaj, see the [Rust docs](https://docs.rs/blahaj)
 
 ## Features
 
@@ -62,16 +59,11 @@ You can run them with `cargo test` and `cargo bench`.
 
 # Contributing
 
-If you find a vulnerability, bug or would like a new feature, [open a new issue](https://github.com/c0dearm/sharks/issues/new).
-
-To introduce your changes into the codebase, submit a Pull Request.
-
-Many thanks!
+If you find a vulnerability, bug or would like a new feature, reach out to
+<mailto:team@distrust.co>.
 
 # License
 
-Sharks is distributed under the terms of both the MIT license and the
-Apache License (Version 2.0).
+Blahaj is distributed under the terms of the MIT license.
 
-See [LICENSE-APACHE](LICENSE-APACHE) and [LICENSE-MIT](LICENSE-MIT), and
-[COPYRIGHT](COPYRIGHT) for details.
+See [LICENSE-MIT](LICENSE-MIT) and [COPYRIGHT](COPYRIGHT) for details.

benches/benchmarks.rs

@@ -1,7 +1,7 @@
 use criterion::{black_box, criterion_group, criterion_main, Criterion};
 use std::convert::TryFrom;
 
-use sharks::{Share, Sharks};
+use blahaj::{Share, Sharks};
 
 fn dealer(c: &mut Criterion) {
     let sharks = Sharks(255);

codecov.yml

@@ -1,20 +0,0 @@
-codecov:
-  require_ci_to_pass: yes
-
-coverage:
-  precision: 2
-  round: down
-  range: "90...100"
-
-parsers:
-  gcov:
-    branch_detection:
-      conditional: yes
-      loop: yes
-      method: no
-      macro: no
-
-comment:
-  layout: "reach,diff,flags,tree"
-  behavior: default
-  require_changes: no

src/lib.rs

@@ -2,7 +2,7 @@
 //!
 //! Usage example (std):
 //! ```
-//! use sharks::{ Sharks, Share };
+//! use blahaj::{ Sharks, Share };
 //!
 //! // Set a minimum threshold of 10 shares
 //! let sharks = Sharks(10);
@@ -20,7 +20,7 @@
 //!
 //! Usage example (no std):
 //! ```
-//! use sharks::{ Sharks, Share };
+//! use blahaj::{ Sharks, Share };
 //! use rand_chacha::rand_core::SeedableRng;
 //!
 //! // Set a minimum threshold of 10 shares
@@ -53,7 +53,7 @@ pub use share::Share;
 ///
 /// Usage example:
 /// ```
-/// # use sharks::{ Sharks, Share };
+/// # use blahaj::{ Sharks, Share };
 /// // Set a minimum threshold of 10 shares
 /// let sharks = Sharks(10);
 /// // Obtain an iterator over the shares for secret [1, 2, 3, 4]
@@ -79,7 +79,7 @@ impl Sharks {
     ///
     /// Example:
     /// ```
-    /// # use sharks::{ Sharks, Share };
+    /// # use blahaj::{ Sharks, Share };
     /// # use rand_chacha::rand_core::SeedableRng;
     /// # let sharks = Sharks(3);
     /// // Obtain an iterator over the shares for secret [1, 2]
@@ -106,7 +106,7 @@ impl Sharks {
     ///
     /// Example:
     /// ```
-    /// # use sharks::{ Sharks, Share };
+    /// # use blahaj::{ Sharks, Share };
     /// # let sharks = Sharks(3);
     /// // Obtain an iterator over the shares for secret [1, 2]
     /// let dealer = sharks.dealer(&[1, 2]);
@@ -124,7 +124,7 @@ impl Sharks {
     ///
     /// Example:
     /// ```
-    /// # use sharks::{ Sharks, Share };
+    /// # use blahaj::{ Sharks, Share };
     /// # use rand_chacha::rand_core::SeedableRng;
     /// # let sharks = Sharks(3);
     /// # let mut rng = rand_chacha::ChaCha8Rng::from_seed([0x90; 32]);

src/math.rs

@@ -30,12 +30,12 @@ pub fn interpolate(shares: &[Share]) -> Vec<u8> {
         .collect()
 }
 
-// Generates `k` polynomial coefficients, being the last one `s` and the others randomly generated between `[1, 255]`.
+// Generates `k` polynomial coefficients, being the last one `s` and the others randomly generated between `[0, 255]`.
 // Coefficient degrees go from higher to lower in the returned vector order.
 pub fn random_polynomial<R: rand::Rng>(s: GF256, k: u8, rng: &mut R) -> Vec<GF256> {
     let k = k as usize;
     let mut poly = Vec::with_capacity(k);
-    let between = Uniform::new_inclusive(1, 255);
+    let between = Uniform::new_inclusive(0, 255);
 
     for _ in 1..k {
         poly.push(GF256(between.sample(rng)));
@@ -50,7 +50,7 @@ pub fn random_polynomial<R: rand::Rng>(s: GF256, k: u8, rng: &mut R) -> Vec<GF25
 // Each polynomial corresponds to one byte chunk of the original secret.
 // The iterator will start at `x = 1` and end at `x = 255`.
 pub fn get_evaluator(polys: Vec<Vec<GF256>>) -> impl Iterator<Item = Share> {
-    (1..=u8::max_value()).map(GF256).map(move |x| Share {
+    (1..=u8::MAX).map(GF256).map(move |x| Share {
         x: x.clone(),
         y: polys
             .iter()

src/share.rs

@@ -12,7 +12,7 @@ use zeroize::Zeroize;
 ///
 /// Usage example:
 /// ```
-/// use sharks::{Sharks, Share};
+/// use blahaj::{Sharks, Share};
 /// use core::convert::TryFrom;
 /// # use rand_chacha::rand_core::SeedableRng;
 /// # fn send_to_printer(_: Vec<u8>) {}