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tests/fuzzers/bls12381: more verbose fuzzing-output #30724

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Nov 4, 2024
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tests/fuzzers/bls12381: more verbose fuzzing-output #30724

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25 changes: 17 additions & 8 deletions tests/fuzzers/bls12381/bls12381_fuzz.go
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Original file line number Diff line number Diff line change
Expand Up @@ -257,8 +257,12 @@ func fuzzCrossG1MultiExp(data []byte) int {
cp.MultiExp(gnarkPoints, gnarkScalars, ecc.MultiExpConfig{})

// compare result
if !(bytes.Equal(cp.Marshal(), g1.ToBytes(&kp))) {
panic("G1 multi exponentiation mismatch gnark / geth ")
gnarkRes := cp.Marshal()
gethRes := g1.ToBytes(&kp)
if !bytes.Equal(gnarkRes, gethRes) {
msg := fmt.Sprintf("G1 multi exponentiation mismatch gnark/geth.\ngnark: %x\ngeth: %x\ninput: %x\n ",
gnarkRes, gethRes, data)
panic(msg)
}

return 1
Expand All @@ -283,15 +287,18 @@ func getG1Points(input io.Reader) (*bls12381.PointG1, *gnark.G1Affine, *blst.P1A
if err != nil {
panic(fmt.Sprintf("Could not marshal gnark.G1 -> geth.G1: %v", err))
}
if !bytes.Equal(g1.ToBytes(kp), cpBytes) {
panic("bytes(gnark.G1) != bytes(geth.G1)")

gnarkRes := g1.ToBytes(kp)
if !bytes.Equal(gnarkRes, cpBytes) {
panic(fmt.Sprintf("bytes(gnark.G1) != bytes(geth.G1)\ngnark.G1: %x\ngeth.G1: %x\n", gnarkRes, cpBytes))
}

// marshal gnark point -> blst point
scalar := new(blst.Scalar).FromBEndian(common.LeftPadBytes(s.Bytes(), 32))
p1 := new(blst.P1Affine).From(scalar)
if !bytes.Equal(p1.Serialize(), cpBytes) {
panic("bytes(blst.G1) != bytes(geth.G1)")
blstRes := p1.Serialize()
if !bytes.Equal(blstRes, cpBytes) {
panic(fmt.Sprintf("bytes(blst.G1) != bytes(geth.G1)\nblst.G1: %x\ngeth.G1: %x\n", blstRes, cpBytes))
}

return kp, cp, p1, nil
Expand All @@ -316,8 +323,10 @@ func getG2Points(input io.Reader) (*bls12381.PointG2, *gnark.G2Affine, *blst.P2A
if err != nil {
panic(fmt.Sprintf("Could not marshal gnark.G2 -> geth.G2: %v", err))
}
if !bytes.Equal(g2.ToBytes(kp), cpBytes) {
panic("bytes(gnark.G2) != bytes(geth.G2)")

gnarkRes := g2.ToBytes(kp)
if !bytes.Equal(gnarkRes, cpBytes) {
panic(fmt.Sprintf("bytes(gnark.G2) != bytes(geth.G2)\ngnark.G2: %x\ngeth.G2: %x\n", gnarkRes, cpBytes))
}

// marshal gnark point -> blst point
Expand Down