tests/fuzzers/bls12381: fix blst pairing (#25037)
* tests/fuzzers/bls12381: fix blst pairing * tests/fuzzers/bls12381: only build on gofuzz * tests/fuzzers/bls12381: remove unused code * tests/fuzzers/bls12381: remove unused code
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@ -65,20 +65,41 @@ func FuzzCrossPairing(data []byte) int {
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panic("pairing mismatch gnark / geth ")
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}
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var b []byte
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ctx := blst.PairingCtx(false, b)
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// compute pairing using blst
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blst.PairingRawAggregate(ctx, blG2, blG1)
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blstResult := blst.PairingAsFp12(ctx)
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if !(bytes.Equal(blstResult.ToBendian(), bls12381.NewGT().ToBytes(kResult))) {
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fmt.Printf("geth: %v\n", common.Bytes2Hex(bls12381.NewGT().ToBytes(kResult)))
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fmt.Printf("blst: %v\n", common.Bytes2Hex(blstResult.ToBendian()))
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blstResult := blst.Fp12MillerLoop(blG2, blG1)
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blstResult.FinalExp()
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res := massageBLST(blstResult.ToBendian())
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if !(bytes.Equal(res, bls12381.NewGT().ToBytes(kResult))) {
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panic("pairing mismatch blst / geth")
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}
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return 1
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}
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func massageBLST(in []byte) []byte {
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out := make([]byte, len(in))
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len := 12 * 48
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// 1
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copy(out[0:], in[len-1*48:len])
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copy(out[1*48:], in[len-2*48:len-1*48])
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// 2
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copy(out[6*48:], in[len-3*48:len-2*48])
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copy(out[7*48:], in[len-4*48:len-3*48])
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// 3
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copy(out[2*48:], in[len-5*48:len-4*48])
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copy(out[3*48:], in[len-6*48:len-5*48])
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// 4
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copy(out[8*48:], in[len-7*48:len-6*48])
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copy(out[9*48:], in[len-8*48:len-7*48])
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// 5
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copy(out[4*48:], in[len-9*48:len-8*48])
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copy(out[5*48:], in[len-10*48:len-9*48])
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// 6
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copy(out[10*48:], in[len-11*48:len-10*48])
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copy(out[11*48:], in[len-12*48:len-11*48])
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return out
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}
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func FuzzCrossG1Add(data []byte) int {
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input := bytes.NewReader(data)
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