go / src / pkg / crypto / x509 / verify_test.go

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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package x509

import (
	"crypto/x509/pkix"
	"encoding/pem"
	"errors"
	"runtime"
	"strings"
	"testing"
	"time"
)

type verifyTest struct {
	leaf          string
	intermediates []string
	roots         []string
	currentTime   int64
	dnsName       string
	systemSkip    bool
	keyUsages     []ExtKeyUsage

	errorCallback  func(*testing.T, int, error) bool
	expectedChains [][]string
}

var verifyTests = []verifyTest{
	{
		leaf:          googleLeaf,
		intermediates: []string{thawteIntermediate},
		roots:         []string{verisignRoot},
		currentTime:   1302726541,
		dnsName:       "www.google.com",

		expectedChains: [][]string{
			{"Google", "Thawte", "VeriSign"},
		},
	},
	{
		leaf:          googleLeaf,
		intermediates: []string{thawteIntermediate},
		roots:         []string{verisignRoot},
		currentTime:   1302726541,
		dnsName:       "WwW.GooGLE.coM",

		expectedChains: [][]string{
			{"Google", "Thawte", "VeriSign"},
		},
	},
	{
		leaf:          googleLeaf,
		intermediates: []string{thawteIntermediate},
		roots:         []string{verisignRoot},
		currentTime:   1302726541,
		dnsName:       "www.example.com",

		errorCallback: expectHostnameError,
	},
	{
		leaf:          googleLeaf,
		intermediates: []string{thawteIntermediate},
		roots:         []string{verisignRoot},
		currentTime:   1,
		dnsName:       "www.example.com",

		errorCallback: expectExpired,
	},
	{
		leaf:        googleLeaf,
		roots:       []string{verisignRoot},
		currentTime: 1302726541,
		dnsName:     "www.google.com",

		// Skip when using systemVerify, since Windows
		// *will* find the missing intermediate cert.
		systemSkip:    true,
		errorCallback: expectAuthorityUnknown,
	},
	{
		leaf:          googleLeaf,
		intermediates: []string{verisignRoot, thawteIntermediate},
		roots:         []string{verisignRoot},
		currentTime:   1302726541,
		dnsName:       "www.google.com",

		expectedChains: [][]string{
			{"Google", "Thawte", "VeriSign"},
		},
	},
	{
		leaf:          dnssecExpLeaf,
		intermediates: []string{startComIntermediate},
		roots:         []string{startComRoot},
		currentTime:   1302726541,

		expectedChains: [][]string{
			{"dnssec-exp", "StartCom Class 1", "StartCom Certification Authority"},
		},
	},
	{
		leaf:          dnssecExpLeaf,
		intermediates: []string{startComIntermediate, startComRoot},
		roots:         []string{startComRoot},
		currentTime:   1302726541,

		// Skip when using systemVerify, since Windows
		// can only return a single chain to us (for now).
		systemSkip: true,
		expectedChains: [][]string{
			{"dnssec-exp", "StartCom Class 1", "StartCom Certification Authority"},
			{"dnssec-exp", "StartCom Class 1", "StartCom Certification Authority", "StartCom Certification Authority"},
		},
	},
	{
		// The default configuration should reject an S/MIME chain.
		leaf:        smimeLeaf,
		roots:       []string{smimeIntermediate},
		currentTime: 1339436154,

		// Key usage not implemented for Windows yet.
		systemSkip:    true,
		errorCallback: expectUsageError,
	},
	{
		leaf:        smimeLeaf,
		roots:       []string{smimeIntermediate},
		currentTime: 1339436154,
		keyUsages:   []ExtKeyUsage{ExtKeyUsageServerAuth},

		// Key usage not implemented for Windows yet.
		systemSkip:    true,
		errorCallback: expectUsageError,
	},
	{
		leaf:        smimeLeaf,
		roots:       []string{smimeIntermediate},
		currentTime: 1339436154,
		keyUsages:   []ExtKeyUsage{ExtKeyUsageEmailProtection},

		// Key usage not implemented for Windows yet.
		systemSkip: true,
		expectedChains: [][]string{
			{"Ryan Hurst", "GlobalSign PersonalSign 2 CA - G2"},
		},
	},
}

func expectHostnameError(t *testing.T, i int, err error) (ok bool) {
	if _, ok := err.(HostnameError); !ok {
		t.Errorf("#%d: error was not a HostnameError: %s", i, err)
		return false
	}
	return true
}

func expectExpired(t *testing.T, i int, err error) (ok bool) {
	if inval, ok := err.(CertificateInvalidError); !ok || inval.Reason != Expired {
		t.Errorf("#%d: error was not Expired: %s", i, err)
		return false
	}
	return true
}

func expectUsageError(t *testing.T, i int, err error) (ok bool) {
	if inval, ok := err.(CertificateInvalidError); !ok || inval.Reason != IncompatibleUsage {
		t.Errorf("#%d: error was not IncompatibleUsage: %s", i, err)
		return false
	}
	return true
}

func expectAuthorityUnknown(t *testing.T, i int, err error) (ok bool) {
	if _, ok := err.(UnknownAuthorityError); !ok {
		t.Errorf("#%d: error was not UnknownAuthorityError: %s", i, err)
		return false
	}
	return true
}

func certificateFromPEM(pemBytes string) (*Certificate, error) {
	block, _ := pem.Decode([]byte(pemBytes))
	if block == nil {
		return nil, errors.New("failed to decode PEM")
	}
	return ParseCertificate(block.Bytes)
}

func testVerify(t *testing.T, useSystemRoots bool) {
	for i, test := range verifyTests {
		if useSystemRoots && test.systemSkip {
			continue
		}

		opts := VerifyOptions{
			Intermediates: NewCertPool(),
			DNSName:       test.dnsName,
			CurrentTime:   time.Unix(test.currentTime, 0),
			KeyUsages:     test.keyUsages,
		}

		if !useSystemRoots {
			opts.Roots = NewCertPool()
			for j, root := range test.roots {
				ok := opts.Roots.AppendCertsFromPEM([]byte(root))
				if !ok {
					t.Errorf("#%d: failed to parse root #%d", i, j)
					return
				}
			}
		}

		for j, intermediate := range test.intermediates {
			ok := opts.Intermediates.AppendCertsFromPEM([]byte(intermediate))
			if !ok {
				t.Errorf("#%d: failed to parse intermediate #%d", i, j)
				return
			}
		}

		leaf, err := certificateFromPEM(test.leaf)
		if err != nil {
			t.Errorf("#%d: failed to parse leaf: %s", i, err)
			return
		}

		chains, err := leaf.Verify(opts)

		if test.errorCallback == nil && err != nil {
			t.Errorf("#%d: unexpected error: %s", i, err)
		}
		if test.errorCallback != nil {
			if !test.errorCallback(t, i, err) {
				return
			}
		}

		if len(chains) != len(test.expectedChains) {
			t.Errorf("#%d: wanted %d chains, got %d", i, len(test.expectedChains), len(chains))
		}

		// We check that each returned chain matches a chain from
		// expectedChains but an entry in expectedChains can't match
		// two chains.
		seenChains := make([]bool, len(chains))
	NextOutputChain:
		for _, chain := range chains {
		TryNextExpected:
			for j, expectedChain := range test.expectedChains {
				if seenChains[j] {
					continue
				}
				if len(chain) != len(expectedChain) {
					continue
				}
				for k, cert := range chain {
					if strings.Index(nameToKey(&cert.Subject), expectedChain[k]) == -1 {
						continue TryNextExpected
					}
				}
				// we matched
				seenChains[j] = true
				continue NextOutputChain
			}
			t.Errorf("#%d: No expected chain matched %s", i, chainToDebugString(chain))
		}
	}
}

func TestGoVerify(t *testing.T) {
	testVerify(t, false)
}

func TestSystemVerify(t *testing.T) {
	if runtime.GOOS != "windows" {
		t.Logf("skipping verify test using system APIs on %q", runtime.GOOS)
		return
	}

	testVerify(t, true)
}

func chainToDebugString(chain []*Certificate) string {
	var chainStr string
	for _, cert := range chain {
		if len(chainStr) > 0 {
			chainStr += " -> "
		}
		chainStr += nameToKey(&cert.Subject)
	}
	return chainStr
}

func nameToKey(name *pkix.Name) string {
	return strings.Join(name.Country, ",") + "/" + strings.Join(name.Organization, ",") + "/" + strings.Join(name.OrganizationalUnit, ",") + "/" + name.CommonName
}

const verisignRoot = `-----BEGIN CERTIFICATE-----
MIICPDCCAaUCEHC65B0Q2Sk0tjjKewPMur8wDQYJKoZIhvcNAQECBQAwXzELMAkG
A1UEBhMCVVMxFzAVBgNVBAoTDlZlcmlTaWduLCBJbmMuMTcwNQYDVQQLEy5DbGFz
cyAzIFB1YmxpYyBQcmltYXJ5IENlcnRpZmljYXRpb24gQXV0aG9yaXR5MB4XDTk2
MDEyOTAwMDAwMFoXDTI4MDgwMTIzNTk1OVowXzELMAkGA1UEBhMCVVMxFzAVBgNV
BAoTDlZlcmlTaWduLCBJbmMuMTcwNQYDVQQLEy5DbGFzcyAzIFB1YmxpYyBQcmlt
YXJ5IENlcnRpZmljYXRpb24gQXV0aG9yaXR5MIGfMA0GCSqGSIb3DQEBAQUAA4GN
ADCBiQKBgQDJXFme8huKARS0EN8EQNvjV69qRUCPhAwL0TPZ2RHP7gJYHyX3KqhE
BarsAx94f56TuZoAqiN91qyFomNFx3InzPRMxnVx0jnvT0Lwdd8KkMaOIG+YD/is
I19wKTakyYbnsZogy1Olhec9vn2a/iRFM9x2Fe0PonFkTGUugWhFpwIDAQABMA0G
CSqGSIb3DQEBAgUAA4GBALtMEivPLCYATxQT3ab7/AoRhIzzKBxnki98tsX63/Do
lbwdj2wsqFHMc9ikwFPwTtYmwHYBV4GSXiHx0bH/59AhWM1pF+NEHJwZRDmJXNyc
AA9WjQKZ7aKQRUzkuxCkPfAyAw7xzvjoyVGM5mKf5p/AfbdynMk2OmufTqj/ZA1k
-----END CERTIFICATE-----
`

const thawteIntermediate = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`

const googleLeaf = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`

const dnssecExpLeaf = `-----BEGIN CERTIFICATE-----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const startComIntermediate = `-----BEGIN CERTIFICATE-----
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-----END CERTIFICATE-----`

const startComRoot = `-----BEGIN CERTIFICATE-----
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-----END CERTIFICATE-----`

const smimeLeaf = `-----BEGIN CERTIFICATE-----
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-----END CERTIFICATE-----`

const smimeIntermediate = `-----BEGIN CERTIFICATE-----
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-----END CERTIFICATE-----`
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