sha1-kotlin
0.1.1indexedLine-by-line transliteration of RustCrypto/hashes, offering API parity across many cryptographic hash algorithms (SHA‑1, BLAKE2, MD5, …); includes source provenance headers.
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sha1-kotlin in Kotlin
This is a Kotlin Multiplatform line-by-line transliteration port of RustCrypto/hashes.
Original Project: This port is based on RustCrypto/hashes. All design credit and project intent belong to the upstream authors; this repository is a faithful port to Kotlin Multiplatform with no behavioural changes intended.
Porting status
This is an in-progress port. The goal is feature parity with the upstream Rust crate while providing a native Kotlin Multiplatform API. Every Kotlin file carries a // port-lint: source <path> header naming its upstream Rust counterpart so the AST-distance tool can track provenance.
Upstream README — RustCrypto/hashes
The text below is reproduced and lightly edited from
https://github.com/RustCrypto/hashes. It is the upstream project's own description and remains under the upstream authors' authorship; links have been rewritten to absolute upstream URLs so they continue to resolve from this repository.
RustCrypto: Hashes
Collection of cryptographic hash functions written in pure Rust.
All algorithms reside in separate crates and are implemented using traits from digest crate.
Usage examples are provided in digest and hash implementation crate docs.
Additionally all crates do not require the standard library (i.e. no_std capable) and can be
easily used for bare-metal or WebAssembly programming by disabling default crate features.
Supported Algorithms
Note: For new applications, or where compatibility with other existing standards is not a primary concern, we strongly recommend to use either BLAKE3, SHA-2 or SHA-3.
NOTE: the blake3 crate implements the digest traits used by the rest of the hashes in this repository, but is maintained by the BLAKE3 team.
Security Level Legend
The following describes the security level ratings associated with each hash function (i.e. algorithms, not the specific implementation):
| Heart | Description |
|---|---|
| :green_heart: | No known successful attacks |
| :yellow_heart: | Theoretical break: security lower than claimed |
| :broken_heart: |
See the Security page on Wikipedia for more information.
Crate Names
Whenever possible crates are published under the same name as the crate folder.
Owners of md5 declined to participate in this project.
This crate does not implement the digest traits, so it is not interoperable with the RustCrypto ecosystem.
This is why we publish our MD5 implementation as and mark it with the :exclamation: mark.
Note that the library itself is named as , i.e. inside statements you should use , not .
License
All crates in this repository are licensed under either of
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
About this Kotlin port
Installation
dependencies {
implementation("io.github.kotlinmania:sha1-kotlin:0.1.1")
}
Building
./gradlew build
./gradlew test
Targets
- macOS arm64
- Linux x64
- Windows mingw-x64
- iOS arm64 / simulator-arm64 (Swift export + XCFramework)
- JS (browser + Node.js)
- Wasm-JS (browser + Node.js)
- Android (API 24+)
Porting guidelines
See AGENTS.md and CLAUDE.md for translator discipline, port-lint header convention, and Rust → Kotlin idiom mapping.
License
This Kotlin port is distributed under the same MIT license as the upstream RustCrypto/hashes. See LICENSE (and any sibling LICENSE-* / NOTICE files mirrored from upstream) for the full text.
Original work copyrighted by the hashes authors.
Kotlin port: Copyright (c) 2026 Sydney Renee and The Solace Project.
Acknowledgments
Thanks to the RustCrypto/hashes maintainers and contributors for the original Rust implementation. This port reproduces their work in Kotlin Multiplatform; bug reports about upstream design or behavior should go to the upstream repository.
