github.com/klaytn/klaytn@v1.12.1/crypto/bn256/cloudflare/lattice_test.go (about)

     1  package bn256
     2  
     3  import (
     4  	"crypto/rand"
     5  	"testing"
     6  )
     7  
     8  func TestLatticeReduceCurve(t *testing.T) {
     9  	k, _ := rand.Int(rand.Reader, Order)
    10  	ks := curveLattice.decompose(k)
    11  
    12  	if ks[0].BitLen() > 130 || ks[1].BitLen() > 130 {
    13  		t.Fatal("reduction too large")
    14  	} else if ks[0].Sign() < 0 || ks[1].Sign() < 0 {
    15  		t.Fatal("reduction must be positive")
    16  	}
    17  }
    18  
    19  func TestLatticeReduceTarget(t *testing.T) {
    20  	k, _ := rand.Int(rand.Reader, Order)
    21  	ks := targetLattice.decompose(k)
    22  
    23  	if ks[0].BitLen() > 66 || ks[1].BitLen() > 66 || ks[2].BitLen() > 66 || ks[3].BitLen() > 66 {
    24  		t.Fatal("reduction too large")
    25  	} else if ks[0].Sign() < 0 || ks[1].Sign() < 0 || ks[2].Sign() < 0 || ks[3].Sign() < 0 {
    26  		t.Fatal("reduction must be positive")
    27  	}
    28  }