49 lines
2.1 KiB
Markdown
49 lines
2.1 KiB
Markdown
[](https://travis-ci.org/rust-bitcoin/rust-secp256k1)
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[Full documentation](https://docs.rs/secp256k1/)
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### rust-secp256k1
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`rust-secp256k1` is a wrapper around [libsecp256k1](https://github.com/bitcoin-core/secp256k1),
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a C library by Pieter Wuille for producing ECDSA signatures using the SECG curve
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`secp256k1`. This library
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* exposes type-safe Rust bindings for all `libsecp256k1` functions
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* implements key generation
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* implements deterministic nonce generation via RFC6979
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* implements many unit tests, adding to those already present in `libsecp256k1`
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* makes no allocations (except in unit tests) for efficiency and use in freestanding implementations
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### Contributing
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Contributions to this library are welcome. A few guidelines:
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* Any breaking changes must have an accompanied entry in CHANGELOG.md
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* No new dependencies, please.
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* No crypto should be implemented in Rust, with the possible exception of hash functions. Cryptographic contributions should be directed upstream to libsecp256k1.
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* This library should always compile with any combination of features on **Rust 1.29**.
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## A note on Rust 1.29 support
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The build dependency `cc` might require a more recent version of the Rust compiler.
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To ensure compilation with Rust 1.29.0, pin its version in your `Cargo.lock`
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with `cargo update -p cc --precise 1.0.41`. If you're using `secp256k1` in a library,
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to make sure it compiles in CI, you'll need to generate a lockfile first.
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Example for Travis CI:
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```yml
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before_script:
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- if [ "$TRAVIS_RUST_VERSION" == "1.29.0" ]; then
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cargo generate-lockfile --verbose && cargo update -p cc --precise "1.0.41" --verbose;
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fi
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```
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## Fuzzing
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If you want to fuzz this library, or any library which depends on it, you will
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probably want to disable the actual cryptography, since fuzzers are unable to
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forge signatures and therefore won't test many interesting codepaths. To instead
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use a trivially-broken but fuzzer-accessible signature scheme, compile with
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`--cfg=fuzzing` in your `RUSTFLAGS` variable.
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Note that `cargo hfuzz` sets this config flag automatically.
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