Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

add audit report #23

Merged
merged 1 commit into from
Oct 9, 2023
Merged

add audit report #23

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 3 additions & 1 deletion README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,13 +1,15 @@
## `P256Verifier` Solidity contract

This repo implements a gas-efficient P256 signature verifier. Verifying a signature costs about 330k gas. Pure function, no precomputation. This implementation was inspired by [Renaud Dubois/Ledger's implementation](https://github.com/rdubois-crypto/FreshCryptoLib).
This repo implements a gas-efficient, audited P256 signature verifier. Verifying a signature costs about 330k gas. Pure function, no precomputation.
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

🚀


The contract matches the proposed [EIP-7212 precompile](https://eips.ethereum.org/EIPS/eip-7212), letting us ship it as a [progressive precompile](https://ethereum-magicians.org/t/progressive-precompiles-via-create2-shadowing/).

**The contract exists at a deterministic CREATE2 address. You can use it on any EVM chain. If the chain implements EIP-7212 at the same CREATE2 address as this contract, you pay ~3.4k gas. If not, you pay ~330k gas. Either way, the contract address and results are identical.** This is particularly beneficial for chains that want to maintain full EVM compatibility while adding this new precompiles (upto gas schedules).

The secp256r1 elliptic curve, aka P256, is used by high-quality consumer enclaves including Yubikey, Apple's Secure Enclave, the Android Keystore, and WebAuthn. P256 verification is especially useful for contract wallets, enabling hardware-based signing keys and smoother UX.

This implementation was inspired by [Renaud Dubois/Ledger's implementation](https://github.com/rdubois-crypto/FreshCryptoLib) and [blst](https://github.com/supranational/blst). Veridise's audit report for this implementation is available [here](./audits/2023-10-veridise.pdf).
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Perfect


## Usage

**Address `0xc2b78104907F722DABAc4C69f826a522B2754De4`**
Expand Down
Binary file added audits/2023-10-veridise.pdf
View file
Open in desktop
Binary file not shown.