RUSTSEC-2021-0060: 
Rust vulnerability analysis and mitigation

The aes-soft crate has been merged into the aes crate as part of a unification effort in the RustCrypto ecosystem. This advisory (RUSTSEC-2021-0060) notifies users that the aes-soft crate is now deprecated and its functionality has been consolidated into the main aes crate (RustCrypto PR).

The unification involved combining multiple AES-related crates (aes, aesni, aes-ctr, and aes-soft) into a single aes crate. The change was implemented to simplify the codebase and make it easier to add hardware-accelerated backends, particularly for platforms like ARM and Apple M1 (RustCrypto PR).

The consolidation affects projects that directly depend on the aes-soft crate. Users need to update their dependencies to use the unified aes crate instead. This change is part of a broader effort to improve the maintainability and extensibility of the RustCrypto AES implementation (RustCrypto PR).

Users should update their dependencies to use the unified aes crate instead of the deprecated aes-soft crate. The migration involves updating the Cargo.toml file to replace aes-soft dependencies with the corresponding aes crate version (RustCrypto PR).