arnaucube/eth-kzg-ceremony-alt
1
0
Fork 0
mirror of https://github.com/arnaucube/eth-kzg-ceremony-alt.git synced 2026-01-08 15:01:30 +01:00
Code Issues Projects Releases Wiki Activity

Migrate from go-ethereum/bls12381 to kilic/bls12381 for zcash compatible point parsers for compressed points

Browse Source
This commit is contained in:
arnaucube
2022-12-07 19:31:53 +01:00
parent 4aae977ea9
commit 4c0858775f
3 changed files with 16 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
go.mod
View File

@@ -3,8 +3,8 @@ module kzgceremony
go 1.19
require (
github.com/ethereum/go-ethereum v1.10.26
github.com/frankban/quicktest v1.14.4
github.com/kilic/bls12-381 v0.1.0
)
require (
@@ -12,6 +12,5 @@ require (
github.com/kr/pretty v0.3.1 // indirect
github.com/kr/text v0.2.0 // indirect
github.com/rogpeppe/go-internal v1.9.0 // indirect
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a // indirect
)

7
go.sum
View File

@@ -1,10 +1,10 @@
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/ethereum/go-ethereum v1.10.26 h1:i/7d9RBBwiXCEuyduBQzJw/mKmnvzsN14jqBmytw72s=
github.com/ethereum/go-ethereum v1.10.26/go.mod h1:EYFyF19u3ezGLD4RqOkLq+ZCXzYbLoNDdZlMt7kyKFg=
github.com/frankban/quicktest v1.14.4 h1:g2rn0vABPOOXmZUj+vbmUp0lPoXEMuhTpIluN0XL9UY=
github.com/frankban/quicktest v1.14.4/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/kilic/bls12-381 v0.1.0 h1:encrdjqKMEvabVQ7qYOKu1OvhqpK4s47wDYtNiPtlp4=
github.com/kilic/bls12-381 v0.1.0/go.mod h1:vDTTHJONJ6G+P2R74EhnyotQDTliQDnFEwhdmfzw1ig=
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
@@ -12,7 +12,6 @@ github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 h1:7I4JAnoQBe7ZtJcBaYHi5UtiO8tQHbUSXxL+pnGRANg=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/sys v0.0.0-20201101102859-da207088b7d1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a h1:dGzPydgVsqGcTRVwiLJ1jVbufYwmzD3LfVPLKsKg+0k=
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

21
powersoftau.go
View File

@@ -1,10 +1,9 @@
package kzgceremony
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/crypto/bls12381"
bls12381 "github.com/kilic/bls12-381"
)
// todo: unify addition & multiplicative notation in the comments
@@ -58,8 +57,9 @@ func tau(randomness []byte) *toxicWaste {
tau := new(big.Int).Mod(
new(big.Int).SetBytes(randomness),
g2.Q())
tau_Fr := bls12381.NewFr().FromBytes(tau.Bytes())
TauG2 := g2.New()
g2.MulScalar(TauG2, g2.One(), tau)
g2.MulScalar(TauG2, g2.One(), tau_Fr)
return &toxicWaste{tau, TauG2}
}
@@ -70,15 +70,17 @@ func computeContribution(t *toxicWaste, prevSRS *SRS) *SRS {
g2 := bls12381.NewG2()
Q := g1.Q() // Q = |G1| == |G2|
fmt.Println("Computing [τ'⁰]₁, [τ'¹]₁, [τ'²]₁, ..., [τ'ⁿ⁻¹]₁, for n =", len(prevSRS.G1s))
// fmt.Println("Computing [τ'⁰]₁, [τ'¹]₁, [τ'²]₁, ..., [τ'ⁿ⁻¹]₁, for n =", len(prevSRS.G1s))
for i := 0; i < len(prevSRS.G1s); i++ {
tau_i := new(big.Int).Exp(t.tau, big.NewInt(int64(i)), Q)
g1.MulScalar(srs.G1s[i], prevSRS.G1s[i], tau_i)
tau_i_Fr := bls12381.NewFr().FromBytes(tau_i.Bytes())
g1.MulScalar(srs.G1s[i], prevSRS.G1s[i], tau_i_Fr)
}
fmt.Println("Computing [τ'⁰]₂, [τ'¹]₂, [τ'²]₂, ..., [τ'ⁿ⁻¹]₂, for n =", len(prevSRS.G2s))
// fmt.Println("Computing [τ'⁰]₂, [τ'¹]₂, [τ'²]₂, ..., [τ'ⁿ⁻¹]₂, for n =", len(prevSRS.G2s))
for i := 0; i < len(prevSRS.G2s); i++ {
tau_i := new(big.Int).Exp(t.tau, big.NewInt(int64(i)), Q)
g2.MulScalar(srs.G2s[i], prevSRS.G2s[i], tau_i)
tau_i_Fr := bls12381.NewFr().FromBytes(tau_i.Bytes())
g2.MulScalar(srs.G2s[i], prevSRS.G2s[i], tau_i_Fr)
}
return srs
@@ -87,7 +89,8 @@ func computeContribution(t *toxicWaste, prevSRS *SRS) *SRS {
func genProof(toxicWaste *toxicWaste, prevSRS, newSRS *SRS) *Proof {
g1 := bls12381.NewG1()
G1_p := g1.New()
g1.MulScalar(G1_p, prevSRS.G1s[1], toxicWaste.tau) // g_1^{tau'} = g_1^{p * tau}, where p=toxicWaste.tau
tau_Fr := bls12381.NewFr().FromBytes(toxicWaste.tau.Bytes())
g1.MulScalar(G1_p, prevSRS.G1s[1], tau_Fr) // g_1^{tau'} = g_1^{p * tau}, where p=toxicWaste.tau
return &Proof{toxicWaste.TauG2, G1_p}
}
@@ -110,7 +113,7 @@ func Contribute(prevSRS *SRS, randomness []byte) (Contribution, error) {
func Verify(prevSRS, newSRS *SRS, proof *Proof) bool {
g1 := bls12381.NewG1()
g2 := bls12381.NewG2()
pairing := bls12381.NewPairingEngine()
pairing := bls12381.NewEngine()
// 1. check that elements of the newSRS are valid points
for i := 0; i < len(newSRS.G1s); i++ {