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author | ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-10-23 04:31:11 +0000 |
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committer | ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-10-23 04:31:11 +0000 |
commit | fb08d0057f91d420b6f48c112264fc87dc91b532 (patch) | |
tree | 46bb86f514fbf6bad82da48e69a18fb09d878834 /libgo/go/crypto/elliptic/elliptic_test.go | |
parent | f507227a181bb31fa87d23a082485f99f3ef9183 (diff) | |
download | gcc-fb08d0057f91d420b6f48c112264fc87dc91b532.tar.gz |
libgo: Update to current sources.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@192704 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libgo/go/crypto/elliptic/elliptic_test.go')
-rw-r--r-- | libgo/go/crypto/elliptic/elliptic_test.go | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libgo/go/crypto/elliptic/elliptic_test.go b/libgo/go/crypto/elliptic/elliptic_test.go index 1e3407ee0e7..58f903966ce 100644 --- a/libgo/go/crypto/elliptic/elliptic_test.go +++ b/libgo/go/crypto/elliptic/elliptic_test.go @@ -322,6 +322,44 @@ func TestGenericBaseMult(t *testing.T) { } } +func TestInfinity(t *testing.T) { + tests := []struct { + name string + curve Curve + }{ + {"p224", P224()}, + {"p256", P256()}, + } + + for _, test := range tests { + curve := test.curve + x, y := curve.ScalarBaseMult(nil) + if x.Sign() != 0 || y.Sign() != 0 { + t.Errorf("%s: x^0 != ∞", test.name) + } + x.SetInt64(0) + y.SetInt64(0) + + x2, y2 := curve.Double(x, y) + if x2.Sign() != 0 || y2.Sign() != 0 { + t.Errorf("%s: 2∞ != ∞", test.name) + } + + baseX := curve.Params().Gx + baseY := curve.Params().Gy + + x3, y3 := curve.Add(baseX, baseY, x, y) + if x3.Cmp(baseX) != 0 || y3.Cmp(baseY) != 0 { + t.Errorf("%s: x+∞ != x", test.name) + } + + x4, y4 := curve.Add(x, y, baseX, baseY) + if x4.Cmp(baseX) != 0 || y4.Cmp(baseY) != 0 { + t.Errorf("%s: ∞+x != x", test.name) + } + } +} + func BenchmarkBaseMult(b *testing.B) { b.ResetTimer() p224 := P224() |