mirror of git://gcc.gnu.org/git/gcc.git
322 lines
7.1 KiB
Go
322 lines
7.1 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ecdsa
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import (
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"bufio"
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"compress/bzip2"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/sha1"
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"crypto/sha256"
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"crypto/sha512"
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"encoding/hex"
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"hash"
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"io"
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"math/big"
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"os"
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"strings"
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"testing"
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)
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func testKeyGeneration(t *testing.T, c elliptic.Curve, tag string) {
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priv, err := GenerateKey(c, rand.Reader)
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if err != nil {
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t.Errorf("%s: error: %s", tag, err)
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return
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}
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if !c.IsOnCurve(priv.PublicKey.X, priv.PublicKey.Y) {
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t.Errorf("%s: public key invalid: %s", tag, err)
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}
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}
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func TestKeyGeneration(t *testing.T) {
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testKeyGeneration(t, elliptic.P224(), "p224")
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if testing.Short() {
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return
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}
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testKeyGeneration(t, elliptic.P256(), "p256")
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testKeyGeneration(t, elliptic.P384(), "p384")
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testKeyGeneration(t, elliptic.P521(), "p521")
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}
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func BenchmarkSignP256(b *testing.B) {
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b.ResetTimer()
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p256 := elliptic.P256()
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hashed := []byte("testing")
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priv, _ := GenerateKey(p256, rand.Reader)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, _, _ = Sign(rand.Reader, priv, hashed)
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}
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}
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func BenchmarkVerifyP256(b *testing.B) {
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b.ResetTimer()
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p256 := elliptic.P256()
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hashed := []byte("testing")
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priv, _ := GenerateKey(p256, rand.Reader)
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r, s, _ := Sign(rand.Reader, priv, hashed)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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Verify(&priv.PublicKey, hashed, r, s)
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}
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}
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func BenchmarkKeyGeneration(b *testing.B) {
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b.ResetTimer()
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p256 := elliptic.P256()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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GenerateKey(p256, rand.Reader)
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}
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}
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func testSignAndVerify(t *testing.T, c elliptic.Curve, tag string) {
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priv, _ := GenerateKey(c, rand.Reader)
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hashed := []byte("testing")
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r, s, err := Sign(rand.Reader, priv, hashed)
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if err != nil {
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t.Errorf("%s: error signing: %s", tag, err)
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return
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}
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if !Verify(&priv.PublicKey, hashed, r, s) {
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t.Errorf("%s: Verify failed", tag)
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}
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hashed[0] ^= 0xff
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if Verify(&priv.PublicKey, hashed, r, s) {
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t.Errorf("%s: Verify always works!", tag)
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}
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}
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func TestSignAndVerify(t *testing.T) {
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testSignAndVerify(t, elliptic.P224(), "p224")
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if testing.Short() {
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return
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}
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testSignAndVerify(t, elliptic.P256(), "p256")
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testSignAndVerify(t, elliptic.P384(), "p384")
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testSignAndVerify(t, elliptic.P521(), "p521")
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}
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func testNonceSafety(t *testing.T, c elliptic.Curve, tag string) {
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priv, _ := GenerateKey(c, rand.Reader)
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hashed := []byte("testing")
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r0, s0, err := Sign(zeroReader, priv, hashed)
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if err != nil {
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t.Errorf("%s: error signing: %s", tag, err)
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return
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}
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hashed = []byte("testing...")
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r1, s1, err := Sign(zeroReader, priv, hashed)
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if err != nil {
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t.Errorf("%s: error signing: %s", tag, err)
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return
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}
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if s0.Cmp(s1) == 0 {
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// This should never happen.
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t.Errorf("%s: the signatures on two different messages were the same", tag)
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}
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if r0.Cmp(r1) == 0 {
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t.Errorf("%s: the nonce used for two different messages was the same", tag)
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}
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}
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func TestNonceSafety(t *testing.T) {
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testNonceSafety(t, elliptic.P224(), "p224")
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if testing.Short() {
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return
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}
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testNonceSafety(t, elliptic.P256(), "p256")
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testNonceSafety(t, elliptic.P384(), "p384")
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testNonceSafety(t, elliptic.P521(), "p521")
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}
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func testINDCCA(t *testing.T, c elliptic.Curve, tag string) {
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priv, _ := GenerateKey(c, rand.Reader)
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hashed := []byte("testing")
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r0, s0, err := Sign(rand.Reader, priv, hashed)
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if err != nil {
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t.Errorf("%s: error signing: %s", tag, err)
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return
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}
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r1, s1, err := Sign(rand.Reader, priv, hashed)
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if err != nil {
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t.Errorf("%s: error signing: %s", tag, err)
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return
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}
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if s0.Cmp(s1) == 0 {
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t.Errorf("%s: two signatures of the same message produced the same result", tag)
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}
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if r0.Cmp(r1) == 0 {
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t.Errorf("%s: two signatures of the same message produced the same nonce", tag)
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}
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}
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func TestINDCCA(t *testing.T) {
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testINDCCA(t, elliptic.P224(), "p224")
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if testing.Short() {
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return
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}
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testINDCCA(t, elliptic.P256(), "p256")
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testINDCCA(t, elliptic.P384(), "p384")
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testINDCCA(t, elliptic.P521(), "p521")
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}
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func fromHex(s string) *big.Int {
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r, ok := new(big.Int).SetString(s, 16)
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if !ok {
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panic("bad hex")
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}
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return r
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}
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func TestVectors(t *testing.T) {
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// This test runs the full set of NIST test vectors from
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// http://csrc.nist.gov/groups/STM/cavp/documents/dss/186-3ecdsatestvectors.zip
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//
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// The SigVer.rsp file has been edited to remove test vectors for
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// unsupported algorithms and has been compressed.
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if testing.Short() {
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return
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}
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f, err := os.Open("testdata/SigVer.rsp.bz2")
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if err != nil {
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t.Fatal(err)
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}
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buf := bufio.NewReader(bzip2.NewReader(f))
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lineNo := 1
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var h hash.Hash
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var msg []byte
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var hashed []byte
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var r, s *big.Int
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pub := new(PublicKey)
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for {
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line, err := buf.ReadString('\n')
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if len(line) == 0 {
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if err == io.EOF {
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break
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}
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t.Fatalf("error reading from input: %s", err)
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}
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lineNo++
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// Need to remove \r\n from the end of the line.
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if !strings.HasSuffix(line, "\r\n") {
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t.Fatalf("bad line ending (expected \\r\\n) on line %d", lineNo)
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}
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line = line[:len(line)-2]
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if len(line) == 0 || line[0] == '#' {
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continue
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}
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if line[0] == '[' {
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line = line[1 : len(line)-1]
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parts := strings.SplitN(line, ",", 2)
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switch parts[0] {
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case "P-224":
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pub.Curve = elliptic.P224()
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case "P-256":
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pub.Curve = elliptic.P256()
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case "P-384":
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pub.Curve = elliptic.P384()
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case "P-521":
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pub.Curve = elliptic.P521()
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default:
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pub.Curve = nil
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}
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switch parts[1] {
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case "SHA-1":
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h = sha1.New()
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case "SHA-224":
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h = sha256.New224()
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case "SHA-256":
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h = sha256.New()
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case "SHA-384":
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h = sha512.New384()
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case "SHA-512":
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h = sha512.New()
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default:
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h = nil
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}
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continue
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}
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if h == nil || pub.Curve == nil {
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continue
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}
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switch {
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case strings.HasPrefix(line, "Msg = "):
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if msg, err = hex.DecodeString(line[6:]); err != nil {
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t.Fatalf("failed to decode message on line %d: %s", lineNo, err)
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}
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case strings.HasPrefix(line, "Qx = "):
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pub.X = fromHex(line[5:])
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case strings.HasPrefix(line, "Qy = "):
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pub.Y = fromHex(line[5:])
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case strings.HasPrefix(line, "R = "):
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r = fromHex(line[4:])
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case strings.HasPrefix(line, "S = "):
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s = fromHex(line[4:])
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case strings.HasPrefix(line, "Result = "):
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expected := line[9] == 'P'
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h.Reset()
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h.Write(msg)
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hashed := h.Sum(hashed[:0])
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if Verify(pub, hashed, r, s) != expected {
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t.Fatalf("incorrect result on line %d", lineNo)
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}
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default:
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t.Fatalf("unknown variable on line %d: %s", lineNo, line)
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}
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}
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}
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func testNegativeInputs(t *testing.T, curve elliptic.Curve, tag string) {
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key, err := GenerateKey(curve, rand.Reader)
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if err != nil {
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t.Errorf("failed to generate key for %q", tag)
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}
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var hash [32]byte
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r := new(big.Int).SetInt64(1)
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r.Lsh(r, 550 /* larger than any supported curve */)
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r.Neg(r)
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if Verify(&key.PublicKey, hash[:], r, r) {
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t.Errorf("bogus signature accepted for %q", tag)
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}
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}
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func TestNegativeInputs(t *testing.T) {
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testNegativeInputs(t, elliptic.P224(), "p224")
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testNegativeInputs(t, elliptic.P256(), "p256")
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testNegativeInputs(t, elliptic.P384(), "p384")
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testNegativeInputs(t, elliptic.P521(), "p521")
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}
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