CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

Changed

• Forbade cloning or destroying secp256k1_context_static. Create a new context instead of cloning the static context. (If this change breaks your code, your code is probably wrong.)
• Forbade randomizing (copies of) secp256k1_context_static. Randomizing a copy of secp256k1_context_static did not have any effect and did not provide defense-in-depth protection against side-channel attacks. Create a new context if you want to benefit from randomization.

0.2.0 - 2022-12-12

Added

• Added usage examples for common use cases in a new examples/ directory.
• Added secp256k1_selftest, to be used in conjunction with secp256k1_context_static.
• Added support for 128-bit wide multiplication on MSVC for x86_64 and arm64, giving roughly a 20% speedup on those platforms.

Changed

• Enabled modules schnorrsig, extrakeys and ecdh by default in ./configure.
• The secp256k1_nonce_function_rfc6979 nonce function, used by default by secp256k1_ecdsa_sign, now reduces the message hash modulo the group order to match the specification. This only affects improper use of ECDSA signing API.

Deprecated

• Deprecated context flags SECP256K1_CONTEXT_VERIFY and SECP256K1_CONTEXT_SIGN. Use SECP256K1_CONTEXT_NONE instead.
• Renamed secp256k1_context_no_precomp to secp256k1_context_static.
• Module schnorrsig: renamed secp256k1_schnorrsig_sign to secp256k1_schnorrsig_sign32.

ABI Compatibility

Since this is the first release, we do not compare application binary interfaces. However, there are earlier unreleased versions of libsecp256k1 that are not ABI compatible with this version.

0.1.0 - 2013-03-05 to 2021-12-25

This version was in fact never released. The number was given by the build system since the introduction of autotools in Jan 2014 (ea0fe5a5bf0c04f9cc955b2966b614f5f378c6f6). Therefore, this version number does not uniquely identify a set of source files.