117 lines
3.7 KiB
Go
117 lines
3.7 KiB
Go
package bn256
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import (
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"testing"
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)
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// Tests that negation works the same way on both assembly-optimized and pure Go
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// implementation.
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func TestGFpNeg(t *testing.T) {
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n := &gfP{0x0123456789abcdef, 0xfedcba9876543210, 0xdeadbeefdeadbeef, 0xfeebdaedfeebdaed}
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w := &gfP{0xfedcba9876543211, 0x0123456789abcdef, 0x2152411021524110, 0x0114251201142512}
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h := &gfP{}
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gfpNeg(h, n)
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if *h != *w {
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t.Errorf("negation mismatch: have %#x, want %#x", *h, *w)
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}
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}
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// Tests that addition works the same way on both assembly-optimized and pure Go
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// implementation.
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func TestGFpAdd(t *testing.T) {
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a := &gfP{0x0123456789abcdef, 0xfedcba9876543210, 0xdeadbeefdeadbeef, 0xfeebdaedfeebdaed}
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b := &gfP{0xfedcba9876543210, 0x0123456789abcdef, 0xfeebdaedfeebdaed, 0xdeadbeefdeadbeef}
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w := &gfP{0xc3df73e9278302b8, 0x687e956e978e3572, 0x254954275c18417f, 0xad354b6afc67f9b4}
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h := &gfP{}
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gfpAdd(h, a, b)
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if *h != *w {
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t.Errorf("addition mismatch: have %#x, want %#x", *h, *w)
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}
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}
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// Tests that subtraction works the same way on both assembly-optimized and pure Go
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// implementation.
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func TestGFpSub(t *testing.T) {
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a := &gfP{0x0123456789abcdef, 0xfedcba9876543210, 0xdeadbeefdeadbeef, 0xfeebdaedfeebdaed}
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b := &gfP{0xfedcba9876543210, 0x0123456789abcdef, 0xfeebdaedfeebdaed, 0xdeadbeefdeadbeef}
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w := &gfP{0x02468acf13579bdf, 0xfdb97530eca86420, 0xdfc1e401dfc1e402, 0x203e1bfe203e1bfd}
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h := &gfP{}
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gfpSub(h, a, b)
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if *h != *w {
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t.Errorf("subtraction mismatch: have %#x, want %#x", *h, *w)
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}
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}
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// Tests that multiplication works the same way on both assembly-optimized and pure Go
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// implementation.
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func TestGFpMul(t *testing.T) {
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a := &gfP{0x0123456789abcdef, 0xfedcba9876543210, 0xdeadbeefdeadbeef, 0xfeebdaedfeebdaed}
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b := &gfP{0xfedcba9876543210, 0x0123456789abcdef, 0xfeebdaedfeebdaed, 0xdeadbeefdeadbeef}
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w := &gfP{0xcbcbd377f7ad22d3, 0x3b89ba5d849379bf, 0x87b61627bd38b6d2, 0xc44052a2a0e654b2}
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h := &gfP{}
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gfpMul(h, a, b)
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if *h != *w {
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t.Errorf("multiplication mismatch: have %#x, want %#x", *h, *w)
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}
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}
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// Tests the conversion from big.Int to GFp element
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func TestNewGFpFromBigInt(t *testing.T) {
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// Case 1
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twoBig := bigFromBase10("2")
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h := *newGFpFromBigInt(twoBig)
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twoHex := [4]uint64{0x0000000000000002, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000}
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w := gfP(twoHex)
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if h != w {
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t.Errorf("conversion mismatch: have %s, want %s", h.String(), w.String())
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}
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// Case 2
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pMinus1Big := bigFromBase10("21888242871839275222246405745257275088696311157297823662689037894645226208582")
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h = *newGFpFromBigInt(pMinus1Big)
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pMinus1Hex := [4]uint64{0x3c208c16d87cfd46, 0x97816a916871ca8d, 0xb85045b68181585d, 0x30644e72e131a029}
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w = gfP(pMinus1Hex)
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if h != w {
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t.Errorf("conversion mismatch: have %s, want %s", h.String(), w.String())
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}
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}
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// Tests the conversion from GFp element to big.Int
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func TestGFpToBigInt(t *testing.T) {
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// Case 1
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twoHex := [4]uint64{0x0000000000000002, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000}
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twoBig := bigFromBase10("2")
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twoGFp := gfP(twoHex) // Not MontEncoded!
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w := twoBig
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h, err := twoGFp.gFpToBigInt()
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if err != nil {
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t.Errorf("Couldn't convert GFp to big.Int: %s", err)
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}
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if r := h.Cmp(w); r != 0 {
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t.Errorf("conversion mismatch: have %s, want %s", h.String(), w.String())
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}
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// Case 2
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pMinus1Hex := [4]uint64{0x3c208c16d87cfd46, 0x97816a916871ca8d, 0xb85045b68181585d, 0x30644e72e131a029}
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pMinus1Big := bigFromBase10("21888242871839275222246405745257275088696311157297823662689037894645226208582")
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pMinus1GFp := gfP(pMinus1Hex) // Not MontEncoded!
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w = pMinus1Big
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h, err = pMinus1GFp.gFpToBigInt()
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if err != nil {
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t.Errorf("Couldn't convert GFp to big.Int: %s", err)
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}
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if r := h.Cmp(w); r != 0 {
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t.Errorf("conversion mismatch: have %s, want %s", h.String(), w.String())
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}
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}
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