299 lines
8.4 KiB
Go
299 lines
8.4 KiB
Go
// Copyright 2009 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 rsa
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import (
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"bytes"
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"crypto"
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"crypto/rand"
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"crypto/sha1"
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"encoding/base64"
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"encoding/hex"
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"io"
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"math/big"
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"testing"
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"testing/quick"
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)
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func decodeBase64(in string) []byte {
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out := make([]byte, base64.StdEncoding.DecodedLen(len(in)))
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n, err := base64.StdEncoding.Decode(out, []byte(in))
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if err != nil {
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return nil
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}
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return out[0:n]
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}
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type DecryptPKCS1v15Test struct {
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in, out string
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}
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// These test vectors were generated with `openssl rsautl -pkcs -encrypt`
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var decryptPKCS1v15Tests = []DecryptPKCS1v15Test{
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{
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"gIcUIoVkD6ATMBk/u/nlCZCCWRKdkfjCgFdo35VpRXLduiKXhNz1XupLLzTXAybEq15juc+EgY5o0DHv/nt3yg==",
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"x",
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},
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{
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"Y7TOCSqofGhkRb+jaVRLzK8xw2cSo1IVES19utzv6hwvx+M8kFsoWQm5DzBeJCZTCVDPkTpavUuEbgp8hnUGDw==",
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"testing.",
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},
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{
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"arReP9DJtEVyV2Dg3dDp4c/PSk1O6lxkoJ8HcFupoRorBZG+7+1fDAwT1olNddFnQMjmkb8vxwmNMoTAT/BFjQ==",
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"testing.\n",
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},
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{
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"WtaBXIoGC54+vH0NH0CHHE+dRDOsMc/6BrfFu2lEqcKL9+uDuWaf+Xj9mrbQCjjZcpQuX733zyok/jsnqe/Ftw==",
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"01234567890123456789012345678901234567890123456789012",
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},
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}
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func TestDecryptPKCS1v15(t *testing.T) {
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decryptionFuncs := []func([]byte) ([]byte, error){
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func(ciphertext []byte) (plaintext []byte, err error) {
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return DecryptPKCS1v15(nil, rsaPrivateKey, ciphertext)
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},
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func(ciphertext []byte) (plaintext []byte, err error) {
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return rsaPrivateKey.Decrypt(nil, ciphertext, nil)
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},
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}
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for _, decryptFunc := range decryptionFuncs {
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for i, test := range decryptPKCS1v15Tests {
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out, err := decryptFunc(decodeBase64(test.in))
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if err != nil {
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t.Errorf("#%d error decrypting", i)
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}
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want := []byte(test.out)
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if !bytes.Equal(out, want) {
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t.Errorf("#%d got:%#v want:%#v", i, out, want)
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}
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}
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}
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}
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func TestEncryptPKCS1v15(t *testing.T) {
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random := rand.Reader
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k := (rsaPrivateKey.N.BitLen() + 7) / 8
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tryEncryptDecrypt := func(in []byte, blind bool) bool {
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if len(in) > k-11 {
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in = in[0 : k-11]
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}
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ciphertext, err := EncryptPKCS1v15(random, &rsaPrivateKey.PublicKey, in)
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if err != nil {
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t.Errorf("error encrypting: %s", err)
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return false
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}
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var rand io.Reader
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if !blind {
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rand = nil
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} else {
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rand = random
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}
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plaintext, err := DecryptPKCS1v15(rand, rsaPrivateKey, ciphertext)
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if err != nil {
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t.Errorf("error decrypting: %s", err)
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return false
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}
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if !bytes.Equal(plaintext, in) {
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t.Errorf("output mismatch: %#v %#v", plaintext, in)
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return false
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}
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return true
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}
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config := new(quick.Config)
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if testing.Short() {
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config.MaxCount = 10
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}
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quick.Check(tryEncryptDecrypt, config)
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}
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// These test vectors were generated with `openssl rsautl -pkcs -encrypt`
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var decryptPKCS1v15SessionKeyTests = []DecryptPKCS1v15Test{
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{
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"e6ukkae6Gykq0fKzYwULpZehX+UPXYzMoB5mHQUDEiclRbOTqas4Y0E6nwns1BBpdvEJcilhl5zsox/6DtGsYg==",
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"1234",
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},
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{
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"Dtis4uk/q/LQGGqGk97P59K03hkCIVFMEFZRgVWOAAhxgYpCRG0MX2adptt92l67IqMki6iVQyyt0TtX3IdtEw==",
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"FAIL",
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},
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{
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"LIyFyCYCptPxrvTxpol8F3M7ZivlMsf53zs0vHRAv+rDIh2YsHS69ePMoPMe3TkOMZ3NupiL3takPxIs1sK+dw==",
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"abcd",
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},
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{
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"bafnobel46bKy76JzqU/RIVOH0uAYvzUtauKmIidKgM0sMlvobYVAVQPeUQ/oTGjbIZ1v/6Gyi5AO4DtHruGdw==",
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"FAIL",
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},
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}
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func TestEncryptPKCS1v15SessionKey(t *testing.T) {
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for i, test := range decryptPKCS1v15SessionKeyTests {
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key := []byte("FAIL")
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err := DecryptPKCS1v15SessionKey(nil, rsaPrivateKey, decodeBase64(test.in), key)
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if err != nil {
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t.Errorf("#%d error decrypting", i)
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}
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want := []byte(test.out)
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if !bytes.Equal(key, want) {
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t.Errorf("#%d got:%#v want:%#v", i, key, want)
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}
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}
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}
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func TestEncryptPKCS1v15DecrypterSessionKey(t *testing.T) {
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for i, test := range decryptPKCS1v15SessionKeyTests {
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plaintext, err := rsaPrivateKey.Decrypt(rand.Reader, decodeBase64(test.in), &PKCS1v15DecryptOptions{SessionKeyLen: 4})
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if err != nil {
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t.Fatalf("#%d: error decrypting: %s", i, err)
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}
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if len(plaintext) != 4 {
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t.Fatalf("#%d: incorrect length plaintext: got %d, want 4", i, len(plaintext))
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}
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if test.out != "FAIL" && !bytes.Equal(plaintext, []byte(test.out)) {
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t.Errorf("#%d: incorrect plaintext: got %x, want %x", i, plaintext, test.out)
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}
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}
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}
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func TestNonZeroRandomBytes(t *testing.T) {
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random := rand.Reader
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b := make([]byte, 512)
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err := nonZeroRandomBytes(b, random)
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if err != nil {
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t.Errorf("returned error: %s", err)
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}
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for _, b := range b {
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if b == 0 {
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t.Errorf("Zero octet found")
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return
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}
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}
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}
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type signPKCS1v15Test struct {
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in, out string
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}
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// These vectors have been tested with
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// `openssl rsautl -verify -inkey pk -in signature | hexdump -C`
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var signPKCS1v15Tests = []signPKCS1v15Test{
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{"Test.\n", "a4f3fa6ea93bcdd0c57be020c1193ecbfd6f200a3d95c409769b029578fa0e336ad9a347600e40d3ae823b8c7e6bad88cc07c1d54c3a1523cbbb6d58efc362ae"},
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}
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func TestSignPKCS1v15(t *testing.T) {
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for i, test := range signPKCS1v15Tests {
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h := sha1.New()
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h.Write([]byte(test.in))
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digest := h.Sum(nil)
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s, err := SignPKCS1v15(nil, rsaPrivateKey, crypto.SHA1, digest)
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if err != nil {
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t.Errorf("#%d %s", i, err)
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}
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expected, _ := hex.DecodeString(test.out)
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if !bytes.Equal(s, expected) {
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t.Errorf("#%d got: %x want: %x", i, s, expected)
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}
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}
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}
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func TestVerifyPKCS1v15(t *testing.T) {
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for i, test := range signPKCS1v15Tests {
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h := sha1.New()
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h.Write([]byte(test.in))
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digest := h.Sum(nil)
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sig, _ := hex.DecodeString(test.out)
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err := VerifyPKCS1v15(&rsaPrivateKey.PublicKey, crypto.SHA1, digest, sig)
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if err != nil {
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t.Errorf("#%d %s", i, err)
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}
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}
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}
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func TestOverlongMessagePKCS1v15(t *testing.T) {
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ciphertext := decodeBase64("fjOVdirUzFoLlukv80dBllMLjXythIf22feqPrNo0YoIjzyzyoMFiLjAc/Y4krkeZ11XFThIrEvw\nkRiZcCq5ng==")
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_, err := DecryptPKCS1v15(nil, rsaPrivateKey, ciphertext)
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if err == nil {
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t.Error("RSA decrypted a message that was too long.")
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}
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}
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func TestUnpaddedSignature(t *testing.T) {
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msg := []byte("Thu Dec 19 18:06:16 EST 2013\n")
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// This base64 value was generated with:
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// % echo Thu Dec 19 18:06:16 EST 2013 > /tmp/msg
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// % openssl rsautl -sign -inkey key -out /tmp/sig -in /tmp/msg
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//
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// Where "key" contains the RSA private key given at the bottom of this
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// file.
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expectedSig := decodeBase64("pX4DR8azytjdQ1rtUiC040FjkepuQut5q2ZFX1pTjBrOVKNjgsCDyiJDGZTCNoh9qpXYbhl7iEym30BWWwuiZg==")
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sig, err := SignPKCS1v15(nil, rsaPrivateKey, crypto.Hash(0), msg)
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if err != nil {
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t.Fatalf("SignPKCS1v15 failed: %s", err)
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}
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if !bytes.Equal(sig, expectedSig) {
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t.Fatalf("signature is not expected value: got %x, want %x", sig, expectedSig)
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}
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if err := VerifyPKCS1v15(&rsaPrivateKey.PublicKey, crypto.Hash(0), msg, sig); err != nil {
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t.Fatalf("signature failed to verify: %s", err)
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}
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}
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func TestShortSessionKey(t *testing.T) {
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// This tests that attempting to decrypt a session key where the
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// ciphertext is too small doesn't run outside the array bounds.
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ciphertext, err := EncryptPKCS1v15(rand.Reader, &rsaPrivateKey.PublicKey, []byte{1})
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if err != nil {
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t.Fatalf("Failed to encrypt short message: %s", err)
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}
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var key [32]byte
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if err := DecryptPKCS1v15SessionKey(nil, rsaPrivateKey, ciphertext, key[:]); err != nil {
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t.Fatalf("Failed to decrypt short message: %s", err)
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}
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for _, v := range key {
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if v != 0 {
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t.Fatal("key was modified when ciphertext was invalid")
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}
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}
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}
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// In order to generate new test vectors you'll need the PEM form of this key:
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// -----BEGIN RSA PRIVATE KEY-----
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// MIIBOgIBAAJBALKZD0nEffqM1ACuak0bijtqE2QrI/KLADv7l3kK3ppMyCuLKoF0
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// fd7Ai2KW5ToIwzFofvJcS/STa6HA5gQenRUCAwEAAQJBAIq9amn00aS0h/CrjXqu
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// /ThglAXJmZhOMPVn4eiu7/ROixi9sex436MaVeMqSNf7Ex9a8fRNfWss7Sqd9eWu
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// RTUCIQDasvGASLqmjeffBNLTXV2A5g4t+kLVCpsEIZAycV5GswIhANEPLmax0ME/
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// EO+ZJ79TJKN5yiGBRsv5yvx5UiHxajEXAiAhAol5N4EUyq6I9w1rYdhPMGpLfk7A
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// IU2snfRJ6Nq2CQIgFrPsWRCkV+gOYcajD17rEqmuLrdIRexpg8N1DOSXoJ8CIGlS
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// tAboUGBxTDq3ZroNism3DaMIbKPyYrAqhKov1h5V
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// -----END RSA PRIVATE KEY-----
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var rsaPrivateKey = &PrivateKey{
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PublicKey: PublicKey{
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N: fromBase10("9353930466774385905609975137998169297361893554149986716853295022578535724979677252958524466350471210367835187480748268864277464700638583474144061408845077"),
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E: 65537,
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},
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D: fromBase10("7266398431328116344057699379749222532279343923819063639497049039389899328538543087657733766554155839834519529439851673014800261285757759040931985506583861"),
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Primes: []*big.Int{
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fromBase10("98920366548084643601728869055592650835572950932266967461790948584315647051443"),
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fromBase10("94560208308847015747498523884063394671606671904944666360068158221458669711639"),
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},
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}
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