[feature] #224: Ensure Ursa compiles with Rust edition 2021

Signed-off-by: Aleksandr Petrosyan <[email protected]>

.github/workflows/rust.yml

@@ -26,30 +26,37 @@ jobs:
     - name: Build
       working-directory: ${{ matrix.workdir }}
       run: cargo build --verbose
+      if: always()
 
     - name: Format
       working-directory: ${{ matrix.workdir }}
       run: cargo fmt --all -- --check
+      if: always()
 
     - name: Docs
       working-directory: ${{ matrix.workdir }}
       run: cargo doc --no-deps
+      if: always()
 
     - name: Clippy
       working-directory: ${{ matrix.workdir }}
       run: cargo clippy --all -- -W clippy::not_unsafe_ptr_arg_deref -A clippy::many_single_char_names
+      if: always()
 
     - name: Check
       working-directory: ${{ matrix.workdir }}
       run: cargo check
+      if: always()
 
     - name: Tests
       working-directory: ${{ matrix.workdir }}
       run: cargo test --release
+      if: always()
 
     - name: Audit
       working-directory: ${{ matrix.workdir }}
       run: cargo audit
+      if: always()
 
 # disabled in AZP
 #

libursa/Cargo.toml

@@ -2,12 +2,13 @@
 name = "ursa"
 version = "0.3.7"
 authors = ["Hyperledger Ursa Contributors"]
-description = "This is the shared crypto library for Hyperledger components."
+description = "The Hyperledger Cryptographic library."
 license = "Apache-2.0"
 readme =  "../README.md"
 repository = "https://github.com/hyperledger/ursa"
 documentation = "https://docs.rs/ursa"
 homepage = "https://crates.io/crates/ursa"
+edition = "2021"
 keywords = ["cryptography", "aead", "hash", "signature", "zero-knowledge"]
 include = [
     "src/bls/**/*.rs",
@@ -177,7 +178,7 @@ license-file = ["../LICENSE", "0"]
 copyright = "2019, Hyperledger"
 depends = "$auto"
 extended-description = """\
-Rust written reliable, secure, easy-to-use, and pluggable cryptographic implementations."""
+Rust-written reliable, secure, easy-to-use, and pluggable cryptographic implementations."""
 section = "admin"
 revision = "1"
 priority = "optional"

libursa/src/bls/mod.rs

@@ -1,5 +1,5 @@
-use errors::prelude::*;
-use pair::{GroupOrderElement, Pair, PointG1, PointG2};
+use crate::errors::prelude::*;
+use crate::pair::{GroupOrderElement, Pair, PointG1, PointG2};
 
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};

libursa/src/bn/openssl.rs

@@ -1,4 +1,4 @@
-use errors::prelude::*;
+use crate::errors::prelude::*;
 
 use int_traits::IntTraits;
 

libursa/src/cl/constants.rs

@@ -1,4 +1,4 @@
-use bn::{BigNumber, BIGNUMBER_2};
+use crate::bn::{BigNumber, BIGNUMBER_2};
 
 pub const LARGE_MASTER_SECRET: usize = 256;
 pub const LARGE_E_START: usize = 596;