init: v1.0.0

gmath/math_test.go

@@ -0,0 +1,99 @@
+package gmath
+
+import (
+	stdbytes "bytes"
+	"crypto/rand"
+	"fmt"
+	"math/big"
+	"os/exec"
+	"testing"
+
+	"xdx.jelly/xgcl/grand"
+)
+
+func TestBig(t *testing.T) {
+	b := grand.Int(0)
+	fmt.Println(b.Bytes(), b.BitLen())
+	a := BigInt2256.Neg(BigInt2256)
+	BigInt2256.Neg(BigInt2256)
+	b, _ = rand.Int(grand.Reader, a)
+	fmt.Println(BigInt2256.Text(16))
+	fmt.Println(b.Text(16))
+	b, _ = rand.Int(grand.Reader, BigInt2)
+	fmt.Println(b)
+}
+
+func TestFillBytes(t *testing.T) {
+	a, _ := new(big.Int).SetString("123455", 16)
+	buf := make([]byte, 1)
+	// buf[2] = 1
+	fmt.Printf("%02x\n", buf)
+	err := FillBytes(a, buf)
+	fmt.Printf("%02x %v\n", buf, err)
+	fmt.Println("over")
+}
+
+func opensslIsPrime(n *big.Int) bool {
+	cmd := exec.Command("openssl", "prime", "-hex", n.Text(16))
+	buf, err := cmd.Output()
+	if err != nil || stdbytes.Contains(buf, []byte("not prime")) {
+		return false
+	}
+	return true
+}
+
+func TestIsPrimeMR(t *testing.T) {
+	bits := 1024
+	n := grand.Int(bits)
+	count := 1
+	for !IsPrimeMR(n) {
+		count++
+		n = grand.Int(bits)
+	}
+	fmt.Println("random times: ", count)
+	fmt.Println(n.Text(16))
+	if !opensslIsPrime(n) {
+		t.Fail()
+	}
+}
+
+func TestZp(t *testing.T) {
+	defer func() {
+		if err := recover(); err != nil {
+			fmt.Println("panic:", err)
+			fmt.Println("recover")
+		}
+	}()
+
+	p, _ := new(big.Int).SetString("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF", 16)
+	a := NewZp(p)
+	b := NewZp(p)
+	c := NewZp(p)
+	a.SetString("BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0", 16)
+	b.SetString("32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7", 16)
+
+	c.Add(a, b)
+	fmt.Println("a+b=   ", c)
+
+	c.Sub(b, a)
+	fmt.Println("b-a=   ", c)
+
+	c.Mul(b, a)
+	fmt.Println("a*b=   ", c)
+
+	c.Inv(b)
+	fmt.Println("b^(-1)=", c)
+
+	b.SetInt(0)
+	c.Inv(b)
+	fmt.Println("0^(-1)=", c)
+
+}
+
+func TestRandom(t *testing.T) {
+	p, _ := new(big.Int).SetString("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF", 16)
+	a := NewZp(p)
+	if err := a.Random(); err != nil {
+		t.Failed()
+	}
+}