github.com/AlohaMobile/go-ethereum@v1.9.7/crypto/bn256/cloudflare/bn256_test.go (about)

     1  package bn256
     2  
     3  import (
     4  	"bytes"
     5  	"crypto/rand"
     6  	"testing"
     7  )
     8  
     9  func TestG1Marshal(t *testing.T) {
    10  	_, Ga, err := RandomG1(rand.Reader)
    11  	if err != nil {
    12  		t.Fatal(err)
    13  	}
    14  	ma := Ga.Marshal()
    15  
    16  	Gb := new(G1)
    17  	_, err = Gb.Unmarshal(ma)
    18  	if err != nil {
    19  		t.Fatal(err)
    20  	}
    21  	mb := Gb.Marshal()
    22  
    23  	if !bytes.Equal(ma, mb) {
    24  		t.Fatal("bytes are different")
    25  	}
    26  }
    27  
    28  func TestG2Marshal(t *testing.T) {
    29  	_, Ga, err := RandomG2(rand.Reader)
    30  	if err != nil {
    31  		t.Fatal(err)
    32  	}
    33  	ma := Ga.Marshal()
    34  
    35  	Gb := new(G2)
    36  	_, err = Gb.Unmarshal(ma)
    37  	if err != nil {
    38  		t.Fatal(err)
    39  	}
    40  	mb := Gb.Marshal()
    41  
    42  	if !bytes.Equal(ma, mb) {
    43  		t.Fatal("bytes are different")
    44  	}
    45  }
    46  
    47  func TestBilinearity(t *testing.T) {
    48  	for i := 0; i < 2; i++ {
    49  		a, p1, _ := RandomG1(rand.Reader)
    50  		b, p2, _ := RandomG2(rand.Reader)
    51  		e1 := Pair(p1, p2)
    52  
    53  		e2 := Pair(&G1{curveGen}, &G2{twistGen})
    54  		e2.ScalarMult(e2, a)
    55  		e2.ScalarMult(e2, b)
    56  
    57  		if *e1.p != *e2.p {
    58  			t.Fatalf("bad pairing result: %s", e1)
    59  		}
    60  	}
    61  }
    62  
    63  func TestTripartiteDiffieHellman(t *testing.T) {
    64  	a, _ := rand.Int(rand.Reader, Order)
    65  	b, _ := rand.Int(rand.Reader, Order)
    66  	c, _ := rand.Int(rand.Reader, Order)
    67  
    68  	pa, pb, pc := new(G1), new(G1), new(G1)
    69  	qa, qb, qc := new(G2), new(G2), new(G2)
    70  
    71  	pa.Unmarshal(new(G1).ScalarBaseMult(a).Marshal())
    72  	qa.Unmarshal(new(G2).ScalarBaseMult(a).Marshal())
    73  	pb.Unmarshal(new(G1).ScalarBaseMult(b).Marshal())
    74  	qb.Unmarshal(new(G2).ScalarBaseMult(b).Marshal())
    75  	pc.Unmarshal(new(G1).ScalarBaseMult(c).Marshal())
    76  	qc.Unmarshal(new(G2).ScalarBaseMult(c).Marshal())
    77  
    78  	k1 := Pair(pb, qc)
    79  	k1.ScalarMult(k1, a)
    80  	k1Bytes := k1.Marshal()
    81  
    82  	k2 := Pair(pc, qa)
    83  	k2.ScalarMult(k2, b)
    84  	k2Bytes := k2.Marshal()
    85  
    86  	k3 := Pair(pa, qb)
    87  	k3.ScalarMult(k3, c)
    88  	k3Bytes := k3.Marshal()
    89  
    90  	if !bytes.Equal(k1Bytes, k2Bytes) || !bytes.Equal(k2Bytes, k3Bytes) {
    91  		t.Errorf("keys didn't agree")
    92  	}
    93  }
    94  
    95  func BenchmarkG1(b *testing.B) {
    96  	x, _ := rand.Int(rand.Reader, Order)
    97  	b.ResetTimer()
    98  
    99  	for i := 0; i < b.N; i++ {
   100  		new(G1).ScalarBaseMult(x)
   101  	}
   102  }
   103  
   104  func BenchmarkG2(b *testing.B) {
   105  	x, _ := rand.Int(rand.Reader, Order)
   106  	b.ResetTimer()
   107  
   108  	for i := 0; i < b.N; i++ {
   109  		new(G2).ScalarBaseMult(x)
   110  	}
   111  }
   112  func BenchmarkPairing(b *testing.B) {
   113  	for i := 0; i < b.N; i++ {
   114  		Pair(&G1{curveGen}, &G2{twistGen})
   115  	}
   116  }