mirror of https://github.com/ethereum/go-ethereum
crypto/kzg4844: pull in the C and Go libs for KZG cryptography (#27155)
* cryto/kzg4844: pull in the C and Go libs for KZG cryptography * go.mod: pull in the KZG libraries * crypto/kzg4844: add basic becnhmarks for ballpark numbers * cmd, crypto: integrate both CKZG and GoKZG all the time, add flag * cmd/utils, crypto/kzg4844: run library init on startup * crypto/kzg4844: make linter happy * crypto/kzg4844: push missing file * crypto/kzg4844: fully disable CKZG but leave in the sources * build, crypto/kzg4844, internal: link CKZG by default and with portable mode * crypto/kzg4844: drop verifying the trusted setup in gokzg * internal/build: yolo until it works? * cmd/utils: make flag description friendlier Co-authored-by: Martin Holst Swende <martin@swende.se> * crypto/ckzg: no need for double availability check * build: tiny flag cleanup nitpick --------- Co-authored-by: Martin Holst Swende <martin@swende.se>pull/27244/head
Péter Szilágyi
2 years ago
committed by
GitHub
parent
ae7db289b8
commit
2169fa343a
@ -0,0 +1,110 @@ |
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// Copyright 2023 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
|
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
|
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package kzg4844 implements the KZG crypto for EIP-4844.
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package kzg4844 |
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import ( |
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"embed" |
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"errors" |
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"sync/atomic" |
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) |
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//go:embed trusted_setup.json
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var content embed.FS |
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// Blob represents a 4844 data blob.
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type Blob [131072]byte |
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// Commitment is a serialized commitment to a polynomial.
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type Commitment [48]byte |
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// Proof is a serialized commitment to the quotient polynomial.
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type Proof [48]byte |
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// Point is a BLS field element.
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type Point [32]byte |
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// Claim is a claimed evaluation value in a specific point.
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type Claim [32]byte |
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// useCKZG controls whether the cryptography should use the Go or C backend.
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var useCKZG atomic.Bool |
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// UseCKZG can be called to switch the default Go implementation of KZG to the C
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// library if fo some reason the user wishes to do so (e.g. consensus bug in one
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// or the other).
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func UseCKZG(use bool) error { |
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if use && !ckzgAvailable { |
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return errors.New("CKZG unavailable on your platform") |
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} |
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useCKZG.Store(use) |
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// Initializing the library can take 2-4 seconds - and can potentially crash
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// on CKZG and non-ADX CPUs - so might as well so it now and don't wait until
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// a crpyto operation is actually needed live.
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if use { |
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ckzgIniter.Do(ckzgInit) |
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} else { |
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gokzgIniter.Do(gokzgInit) |
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} |
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return nil |
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} |
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// BlobToCommitment creates a small commitment out of a data blob.
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func BlobToCommitment(blob Blob) (Commitment, error) { |
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if useCKZG.Load() { |
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return ckzgBlobToCommitment(blob) |
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} |
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return gokzgBlobToCommitment(blob) |
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} |
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// ComputeProof computes the KZG proof at the given point for the polynomial
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// represented by the blob.
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func ComputeProof(blob Blob, point Point) (Proof, Claim, error) { |
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if useCKZG.Load() { |
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return ckzgComputeProof(blob, point) |
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} |
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return gokzgComputeProof(blob, point) |
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} |
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// VerifyProof verifies the KZG proof that the polynomial represented by the blob
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// evaluated at the given point is the claimed value.
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func VerifyProof(commitment Commitment, point Point, claim Claim, proof Proof) error { |
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if useCKZG.Load() { |
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return ckzgVerifyProof(commitment, point, claim, proof) |
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} |
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return gokzgVerifyProof(commitment, point, claim, proof) |
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} |
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// ComputeBlobProof returns the KZG proof that is used to verify the blob against
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// the commitment.
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//
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// This method does not verify that the commitment is correct with respect to blob.
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func ComputeBlobProof(blob Blob, commitment Commitment) (Proof, error) { |
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if useCKZG.Load() { |
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return ckzgComputeBlobProof(blob, commitment) |
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} |
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return gokzgComputeBlobProof(blob, commitment) |
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} |
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// VerifyBlobProof verifies that the blob data corresponds to the provided commitment.
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func VerifyBlobProof(blob Blob, commitment Commitment, proof Proof) error { |
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if useCKZG.Load() { |
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return ckzgVerifyBlobProof(blob, commitment, proof) |
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} |
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return gokzgVerifyBlobProof(blob, commitment, proof) |
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} |
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@ -0,0 +1,119 @@ |
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// Copyright 2023 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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//go:build ckzg && !nacl && !js && cgo && !gofuzz
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package kzg4844 |
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import ( |
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"encoding/json" |
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"errors" |
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"sync" |
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gokzg4844 "github.com/crate-crypto/go-kzg-4844" |
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ckzg4844 "github.com/ethereum/c-kzg-4844/bindings/go" |
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"github.com/ethereum/go-ethereum/common/hexutil" |
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) |
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// ckzgAvailable signals whether the library was compiled into Geth.
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const ckzgAvailable = true |
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// ckzgIniter ensures that we initialize the KZG library once before using it.
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var ckzgIniter sync.Once |
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// ckzgInit initializes the KZG library with the provided trusted setup.
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func ckzgInit() { |
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config, err := content.ReadFile("trusted_setup.json") |
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if err != nil { |
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panic(err) |
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} |
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params := new(gokzg4844.JSONTrustedSetup) |
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if err = json.Unmarshal(config, params); err != nil { |
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panic(err) |
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} |
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if err = gokzg4844.CheckTrustedSetupIsWellFormed(params); err != nil { |
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panic(err) |
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} |
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g1s := make([]byte, len(params.SetupG1)*(len(params.SetupG1[0])-2)/2) |
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for i, g1 := range params.SetupG1 { |
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copy(g1s[i*(len(g1)-2)/2:], hexutil.MustDecode(g1)) |
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} |
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g2s := make([]byte, len(params.SetupG2)*(len(params.SetupG2[0])-2)/2) |
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for i, g2 := range params.SetupG2 { |
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copy(g2s[i*(len(g2)-2)/2:], hexutil.MustDecode(g2)) |
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} |
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if err = ckzg4844.LoadTrustedSetup(g1s, g2s); err != nil { |
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panic(err) |
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} |
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} |
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// ckzgBlobToCommitment creates a small commitment out of a data blob.
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func ckzgBlobToCommitment(blob Blob) (Commitment, error) { |
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ckzgIniter.Do(ckzgInit) |
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commitment, err := ckzg4844.BlobToKZGCommitment((ckzg4844.Blob)(blob)) |
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if err != nil { |
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return Commitment{}, err |
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} |
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return (Commitment)(commitment), nil |
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} |
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// ckzgComputeProof computes the KZG proof at the given point for the polynomial
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// represented by the blob.
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func ckzgComputeProof(blob Blob, point Point) (Proof, Claim, error) { |
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proof, claim, err := ckzg4844.ComputeKZGProof((ckzg4844.Blob)(blob), (ckzg4844.Bytes32)(point)) |
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if err != nil { |
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return Proof{}, Claim{}, err |
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} |
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return (Proof)(proof), (Claim)(claim), nil |
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} |
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// ckzgVerifyProof verifies the KZG proof that the polynomial represented by the blob
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// evaluated at the given point is the claimed value.
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func ckzgVerifyProof(commitment Commitment, point Point, claim Claim, proof Proof) error { |
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valid, err := ckzg4844.VerifyKZGProof((ckzg4844.Bytes48)(commitment), (ckzg4844.Bytes32)(point), (ckzg4844.Bytes32)(claim), (ckzg4844.Bytes48)(proof)) |
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if err != nil { |
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return err |
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} |
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if !valid { |
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return errors.New("invalid proof") |
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} |
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return nil |
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} |
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// ckzgComputeBlobProof returns the KZG proof that is used to verify the blob against
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// the commitment.
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//
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// This method does not verify that the commitment is correct with respect to blob.
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func ckzgComputeBlobProof(blob Blob, commitment Commitment) (Proof, error) { |
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proof, err := ckzg4844.ComputeBlobKZGProof((ckzg4844.Blob)(blob), (ckzg4844.Bytes48)(commitment)) |
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if err != nil { |
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return Proof{}, err |
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} |
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return (Proof)(proof), nil |
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} |
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// ckzgVerifyBlobProof verifies that the blob data corresponds to the provided commitment.
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func ckzgVerifyBlobProof(blob Blob, commitment Commitment, proof Proof) error { |
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valid, err := ckzg4844.VerifyBlobKZGProof((ckzg4844.Blob)(blob), (ckzg4844.Bytes48)(commitment), (ckzg4844.Bytes48)(proof)) |
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if err != nil { |
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return err |
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} |
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if !valid { |
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return errors.New("invalid proof") |
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} |
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return nil |
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} |
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@ -0,0 +1,62 @@ |
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// Copyright 2023 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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//go:build !ckzg || nacl || js || !cgo || gofuzz
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package kzg4844 |
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import "sync" |
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// ckzgAvailable signals whether the library was compiled into Geth.
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const ckzgAvailable = false |
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// ckzgIniter ensures that we initialize the KZG library once before using it.
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var ckzgIniter sync.Once |
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// ckzgInit initializes the KZG library with the provided trusted setup.
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func ckzgInit() { |
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panic("unsupported platform") |
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} |
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// ckzgBlobToCommitment creates a small commitment out of a data blob.
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func ckzgBlobToCommitment(blob Blob) (Commitment, error) { |
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panic("unsupported platform") |
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} |
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// ckzgComputeProof computes the KZG proof at the given point for the polynomial
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// represented by the blob.
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func ckzgComputeProof(blob Blob, point Point) (Proof, Claim, error) { |
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panic("unsupported platform") |
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} |
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// ckzgVerifyProof verifies the KZG proof that the polynomial represented by the blob
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// evaluated at the given point is the claimed value.
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func ckzgVerifyProof(commitment Commitment, point Point, claim Claim, proof Proof) error { |
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panic("unsupported platform") |
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} |
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// ckzgComputeBlobProof returns the KZG proof that is used to verify the blob against
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// the commitment.
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//
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// This method does not verify that the commitment is correct with respect to blob.
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func ckzgComputeBlobProof(blob Blob, commitment Commitment) (Proof, error) { |
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panic("unsupported platform") |
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} |
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// ckzgVerifyBlobProof verifies that the blob data corresponds to the provided commitment.
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func ckzgVerifyBlobProof(blob Blob, commitment Commitment, proof Proof) error { |
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panic("unsupported platform") |
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} |
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@ -0,0 +1,98 @@ |
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// Copyright 2023 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package kzg4844 |
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import ( |
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"encoding/json" |
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"sync" |
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gokzg4844 "github.com/crate-crypto/go-kzg-4844" |
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) |
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// context is the crypto primitive pre-seeded with the trusted setup parameters.
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var context *gokzg4844.Context |
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// gokzgIniter ensures that we initialize the KZG library once before using it.
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var gokzgIniter sync.Once |
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// gokzgInit initializes the KZG library with the provided trusted setup.
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func gokzgInit() { |
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config, err := content.ReadFile("trusted_setup.json") |
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if err != nil { |
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panic(err) |
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} |
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params := new(gokzg4844.JSONTrustedSetup) |
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if err = json.Unmarshal(config, params); err != nil { |
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panic(err) |
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} |
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context, err = gokzg4844.NewContext4096(params) |
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if err != nil { |
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panic(err) |
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} |
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} |
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// gokzgBlobToCommitment creates a small commitment out of a data blob.
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func gokzgBlobToCommitment(blob Blob) (Commitment, error) { |
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gokzgIniter.Do(gokzgInit) |
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commitment, err := context.BlobToKZGCommitment((gokzg4844.Blob)(blob), 0) |
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if err != nil { |
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return Commitment{}, err |
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} |
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return (Commitment)(commitment), nil |
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} |
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// gokzgComputeProof computes the KZG proof at the given point for the polynomial
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// represented by the blob.
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func gokzgComputeProof(blob Blob, point Point) (Proof, Claim, error) { |
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gokzgIniter.Do(gokzgInit) |
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proof, claim, err := context.ComputeKZGProof((gokzg4844.Blob)(blob), (gokzg4844.Scalar)(point), 0) |
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if err != nil { |
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return Proof{}, Claim{}, err |
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} |
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return (Proof)(proof), (Claim)(claim), nil |
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} |
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// gokzgVerifyProof verifies the KZG proof that the polynomial represented by the blob
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// evaluated at the given point is the claimed value.
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func gokzgVerifyProof(commitment Commitment, point Point, claim Claim, proof Proof) error { |
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gokzgIniter.Do(gokzgInit) |
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return context.VerifyKZGProof((gokzg4844.KZGCommitment)(commitment), (gokzg4844.Scalar)(point), (gokzg4844.Scalar)(claim), (gokzg4844.KZGProof)(proof)) |
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} |
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// gokzgComputeBlobProof returns the KZG proof that is used to verify the blob against
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// the commitment.
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//
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// This method does not verify that the commitment is correct with respect to blob.
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func gokzgComputeBlobProof(blob Blob, commitment Commitment) (Proof, error) { |
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gokzgIniter.Do(gokzgInit) |
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proof, err := context.ComputeBlobKZGProof((gokzg4844.Blob)(blob), (gokzg4844.KZGCommitment)(commitment), 0) |
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if err != nil { |
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return Proof{}, err |
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} |
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return (Proof)(proof), nil |
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} |
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// gokzgVerifyBlobProof verifies that the blob data corresponds to the provided commitment.
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func gokzgVerifyBlobProof(blob Blob, commitment Commitment, proof Proof) error { |
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gokzgIniter.Do(gokzgInit) |
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return context.VerifyBlobKZGProof((gokzg4844.Blob)(blob), (gokzg4844.KZGCommitment)(commitment), (gokzg4844.KZGProof)(proof)) |
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} |
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@ -0,0 +1,187 @@ |
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// Copyright 2023 The go-ethereum Authors
|
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// This file is part of the go-ethereum library.
|
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//
|
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// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
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//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
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|
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package kzg4844 |
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|
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import ( |
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"crypto/rand" |
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"testing" |
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"github.com/consensys/gnark-crypto/ecc/bls12-381/fr" |
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gokzg4844 "github.com/crate-crypto/go-kzg-4844" |
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) |
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func randFieldElement() [32]byte { |
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bytes := make([]byte, 32) |
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_, err := rand.Read(bytes) |
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if err != nil { |
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panic("failed to get random field element") |
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} |
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var r fr.Element |
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r.SetBytes(bytes) |
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return gokzg4844.SerializeScalar(r) |
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} |
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func randBlob() Blob { |
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var blob Blob |
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for i := 0; i < len(blob); i += gokzg4844.SerializedScalarSize { |
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fieldElementBytes := randFieldElement() |
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copy(blob[i:i+gokzg4844.SerializedScalarSize], fieldElementBytes[:]) |
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} |
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return blob |
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} |
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func TestCKZGWithPoint(t *testing.T) { testKZGWithPoint(t, true) } |
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func TestGoKZGWithPoint(t *testing.T) { testKZGWithPoint(t, false) } |
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|
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func testKZGWithPoint(t *testing.T, ckzg bool) { |
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if ckzg && !ckzgAvailable { |
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t.Skip("CKZG unavailable in this test build") |
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} |
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defer func(old bool) { useCKZG.Store(old) }(useCKZG.Load()) |
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useCKZG.Store(ckzg) |
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blob := randBlob() |
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commitment, err := BlobToCommitment(blob) |
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if err != nil { |
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t.Fatalf("failed to create KZG commitment from blob: %v", err) |
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} |
||||
point := randFieldElement() |
||||
proof, claim, err := ComputeProof(blob, point) |
||||
if err != nil { |
||||
t.Fatalf("failed to create KZG proof at point: %v", err) |
||||
} |
||||
if err := VerifyProof(commitment, point, claim, proof); err != nil { |
||||
t.Fatalf("failed to verify KZG proof at point: %v", err) |
||||
} |
||||
} |
||||
|
||||
func TestCKZGWithBlob(t *testing.T) { testKZGWithBlob(t, true) } |
||||
func TestGoKZGWithBlob(t *testing.T) { testKZGWithBlob(t, false) } |
||||
|
||||
func testKZGWithBlob(t *testing.T, ckzg bool) { |
||||
if ckzg && !ckzgAvailable { |
||||
t.Skip("CKZG unavailable in this test build") |
||||
} |
||||
defer func(old bool) { useCKZG.Store(old) }(useCKZG.Load()) |
||||
useCKZG.Store(ckzg) |
||||
|
||||
blob := randBlob() |
||||
|
||||
commitment, err := BlobToCommitment(blob) |
||||
if err != nil { |
||||
t.Fatalf("failed to create KZG commitment from blob: %v", err) |
||||
} |
||||
proof, err := ComputeBlobProof(blob, commitment) |
||||
if err != nil { |
||||
t.Fatalf("failed to create KZG proof for blob: %v", err) |
||||
} |
||||
if err := VerifyBlobProof(blob, commitment, proof); err != nil { |
||||
t.Fatalf("failed to verify KZG proof for blob: %v", err) |
||||
} |
||||
} |
||||
|
||||
func BenchmarkCKZGBlobToCommitment(b *testing.B) { benchmarkBlobToCommitment(b, true) } |
||||
func BenchmarkGoKZGBlobToCommitment(b *testing.B) { benchmarkBlobToCommitment(b, false) } |
||||
func benchmarkBlobToCommitment(b *testing.B, ckzg bool) { |
||||
if ckzg && !ckzgAvailable { |
||||
b.Skip("CKZG unavailable in this test build") |
||||
} |
||||
defer func(old bool) { useCKZG.Store(old) }(useCKZG.Load()) |
||||
useCKZG.Store(ckzg) |
||||
|
||||
blob := randBlob() |
||||
for i := 0; i < b.N; i++ { |
||||
BlobToCommitment(blob) |
||||
} |
||||
} |
||||
|
||||
func BenchmarkCKZGComputeProof(b *testing.B) { benchmarkComputeProof(b, true) } |
||||
func BenchmarkGoKZGComputeProof(b *testing.B) { benchmarkComputeProof(b, false) } |
||||
func benchmarkComputeProof(b *testing.B, ckzg bool) { |
||||
if ckzg && !ckzgAvailable { |
||||
b.Skip("CKZG unavailable in this test build") |
||||
} |
||||
defer func(old bool) { useCKZG.Store(old) }(useCKZG.Load()) |
||||
useCKZG.Store(ckzg) |
||||
|
||||
var ( |
||||
blob = randBlob() |
||||
point = randFieldElement() |
||||
) |
||||
for i := 0; i < b.N; i++ { |
||||
ComputeProof(blob, point) |
||||
} |
||||
} |
||||
|
||||
func BenchmarkCKZGVerifyProof(b *testing.B) { benchmarkVerifyProof(b, true) } |
||||
func BenchmarkGoKZGVerifyProof(b *testing.B) { benchmarkVerifyProof(b, false) } |
||||
func benchmarkVerifyProof(b *testing.B, ckzg bool) { |
||||
if ckzg && !ckzgAvailable { |
||||
b.Skip("CKZG unavailable in this test build") |
||||
} |
||||
defer func(old bool) { useCKZG.Store(old) }(useCKZG.Load()) |
||||
useCKZG.Store(ckzg) |
||||
|
||||
var ( |
||||
blob = randBlob() |
||||
point = randFieldElement() |
||||
commitment, _ = BlobToCommitment(blob) |
||||
proof, claim, _ = ComputeProof(blob, point) |
||||
) |
||||
for i := 0; i < b.N; i++ { |
||||
VerifyProof(commitment, point, claim, proof) |
||||
} |
||||
} |
||||
|
||||
func BenchmarkCKZGComputeBlobProof(b *testing.B) { benchmarkComputeBlobProof(b, true) } |
||||
func BenchmarkGoKZGComputeBlobProof(b *testing.B) { benchmarkComputeBlobProof(b, false) } |
||||
func benchmarkComputeBlobProof(b *testing.B, ckzg bool) { |
||||
if ckzg && !ckzgAvailable { |
||||
b.Skip("CKZG unavailable in this test build") |
||||
} |
||||
defer func(old bool) { useCKZG.Store(old) }(useCKZG.Load()) |
||||
useCKZG.Store(ckzg) |
||||
|
||||
var ( |
||||
blob = randBlob() |
||||
commitment, _ = BlobToCommitment(blob) |
||||
) |
||||
for i := 0; i < b.N; i++ { |
||||
ComputeBlobProof(blob, commitment) |
||||
} |
||||
} |
||||
|
||||
func BenchmarkCKZGVerifyBlobProof(b *testing.B) { benchmarkVerifyBlobProof(b, true) } |
||||
func BenchmarkGoKZGVerifyBlobProof(b *testing.B) { benchmarkVerifyBlobProof(b, false) } |
||||
func benchmarkVerifyBlobProof(b *testing.B, ckzg bool) { |
||||
if ckzg && !ckzgAvailable { |
||||
b.Skip("CKZG unavailable in this test build") |
||||
} |
||||
defer func(old bool) { useCKZG.Store(old) }(useCKZG.Load()) |
||||
useCKZG.Store(ckzg) |
||||
|
||||
var ( |
||||
blob = randBlob() |
||||
commitment, _ = BlobToCommitment(blob) |
||||
proof, _ = ComputeBlobProof(blob, commitment) |
||||
) |
||||
for i := 0; i < b.N; i++ { |
||||
VerifyBlobProof(blob, commitment, proof) |
||||
} |
||||
} |
||||
File diff suppressed because it is too large
Load Diff
Loading…
Reference in new issue