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Custom fork of rust-secp256k1 with unsafe modifications for higher speed. Unsuitable for production.
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Matt Corallo 940a51c2c6 Reduce cryptography usage in --cfg=fuzzing 
This reduces the usage of real cryptography in --cfg=fuzzing,
specifically replacing the secret->public key derivation with a
simple copy and ECDH with XOR of the public and private parts
(plus a stream of 1s to make a test pass that expected non-0
output).

It leaves secret tweak addition/multiplication as-is.

It also changes the context creation to over-allocate and store
the context flags at the end of the context buffer, allowing us
to easily test context flags in each function.

While it would be nice to have something fancier (eg XOR-based),
its not immediately obvious how to accomplish this, and better to
fix the issues I have than spend too much time on it.

Fixes #271.

This partially reverts b811ec133a
 		2021-06-08 19:17:08 +00:00
.github/workflows switch from travis to github workflows 2020-11-10 23:58:03 +00:00
contrib Manually test that panicking from C will abort the process 2021-03-24 21:54:02 +01:00
examples Aded an example for recoverable signatures and recovering the pubkey 2019-10-28 22:23:56 +02:00
no_std_test Touch recovery module in no_std_test 2021-05-20 07:18:42 -06:00
secp256k1-sys Reduce cryptography usage in --cfg=fuzzing 2021-06-08 19:17:08 +00:00
src Reduce cryptography usage in --cfg=fuzzing 2021-06-08 19:17:08 +00:00
.gitignore Added ECMULT window size 2019-07-03 17:48:35 -04:00
CHANGELOG.md release secp256k1 0.20.2 2021-04-27 22:16:58 +00:00
Cargo.toml Add a global-context-less-secure feature which skips randomization 2021-06-08 01:48:50 +00:00
LICENSE Remove the MIT/CC0 license in favor of just CC0 2015-03-25 18:36:30 -05:00
Makefile Initial (failing) implementation. 2014-07-06 22:41:22 -07:00
README.md rename `rust_secp_fuzz` to `fuzzing` 2021-01-11 19:14:42 +00:00

README.md

Build Status

Full documentation

rust-secp256k1

rust-secp256k1 is a wrapper around libsecp256k1, a C library by Pieter Wuille for producing ECDSA signatures using the SECG curve secp256k1. This library

  • exposes type-safe Rust bindings for all libsecp256k1 functions
  • implements key generation
  • implements deterministic nonce generation via RFC6979
  • implements many unit tests, adding to those already present in libsecp256k1
  • makes no allocations (except in unit tests) for efficiency and use in freestanding implementations

Contributing

Contributions to this library are welcome. A few guidelines:

  • Any breaking changes must have an accompanied entry in CHANGELOG.md
  • No new dependencies, please.
  • No crypto should be implemented in Rust, with the possible exception of hash functions. Cryptographic contributions should be directed upstream to libsecp256k1.
  • This library should always compile with any combination of features on Rust 1.29.

A note on Rust 1.29 support

The build dependency cc might require a more recent version of the Rust compiler. To ensure compilation with Rust 1.29.0, pin its version in your Cargo.lock with cargo update -p cc --precise 1.0.41. If you're using secp256k1 in a library, to make sure it compiles in CI, you'll need to generate a lockfile first. Example for Travis CI:

before_script:
  - if [ "$TRAVIS_RUST_VERSION" == "1.29.0" ]; then
    cargo generate-lockfile --verbose && cargo update -p cc --precise "1.0.41" --verbose;
    fi

Fuzzing

If you want to fuzz this library, or any library which depends on it, you will probably want to disable the actual cryptography, since fuzzers are unable to forge signatures and therefore won't test many interesting codepaths. To instead use a trivially-broken but fuzzer-accessible signature scheme, compile with --cfg=fuzzing in your RUSTFLAGS variable.

Note that cargo hfuzz sets this config flag automatically.