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-rw-r--r--src/crypto/x509/verify_test.go2636
1 files changed, 2636 insertions, 0 deletions
diff --git a/src/crypto/x509/verify_test.go b/src/crypto/x509/verify_test.go
new file mode 100644
index 0000000..14856f8
--- /dev/null
+++ b/src/crypto/x509/verify_test.go
@@ -0,0 +1,2636 @@
+// 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"
+ "crypto/ecdsa"
+ "crypto/elliptic"
+ "crypto/rand"
+ "crypto/x509/pkix"
+ "encoding/asn1"
+ "encoding/pem"
+ "errors"
+ "fmt"
+ "internal/testenv"
+ "math/big"
+ "os/exec"
+ "reflect"
+ "runtime"
+ "sort"
+ "strconv"
+ "strings"
+ "testing"
+ "time"
+)
+
+type verifyTest struct {
+ name string
+ leaf string
+ intermediates []string
+ roots []string
+ currentTime int64
+ dnsName string
+ systemSkip bool
+ systemLax bool
+ keyUsages []ExtKeyUsage
+
+ errorCallback func(*testing.T, error)
+ expectedChains [][]string
+}
+
+var verifyTests = []verifyTest{
+ {
+ name: "Valid",
+ leaf: googleLeaf,
+ intermediates: []string{gtsIntermediate},
+ roots: []string{gtsRoot},
+ currentTime: 1677615892,
+ dnsName: "www.google.com",
+
+ expectedChains: [][]string{
+ {"www.google.com", "GTS CA 1C3", "GTS Root R1"},
+ },
+ },
+ {
+ name: "MixedCase",
+ leaf: googleLeaf,
+ intermediates: []string{gtsIntermediate},
+ roots: []string{gtsRoot},
+ currentTime: 1677615892,
+ dnsName: "WwW.GooGLE.coM",
+
+ expectedChains: [][]string{
+ {"www.google.com", "GTS CA 1C3", "GTS Root R1"},
+ },
+ },
+ {
+ name: "HostnameMismatch",
+ leaf: googleLeaf,
+ intermediates: []string{gtsIntermediate},
+ roots: []string{gtsRoot},
+ currentTime: 1677615892,
+ dnsName: "www.example.com",
+
+ errorCallback: expectHostnameError("certificate is valid for"),
+ },
+ {
+ name: "IPMissing",
+ leaf: googleLeaf,
+ intermediates: []string{gtsIntermediate},
+ roots: []string{gtsRoot},
+ currentTime: 1677615892,
+ dnsName: "1.2.3.4",
+
+ errorCallback: expectHostnameError("doesn't contain any IP SANs"),
+ },
+ {
+ name: "Expired",
+ leaf: googleLeaf,
+ intermediates: []string{gtsIntermediate},
+ roots: []string{gtsRoot},
+ currentTime: 1,
+ dnsName: "www.example.com",
+
+ errorCallback: expectExpired,
+ },
+ {
+ name: "MissingIntermediate",
+ leaf: googleLeaf,
+ roots: []string{gtsRoot},
+ currentTime: 1677615892,
+ dnsName: "www.google.com",
+
+ // Skip when using systemVerify, since Windows
+ // *will* find the missing intermediate cert.
+ systemSkip: true,
+ errorCallback: expectAuthorityUnknown,
+ },
+ {
+ name: "RootInIntermediates",
+ leaf: googleLeaf,
+ intermediates: []string{gtsRoot, gtsIntermediate},
+ roots: []string{gtsRoot},
+ currentTime: 1677615892,
+ dnsName: "www.google.com",
+
+ expectedChains: [][]string{
+ {"www.google.com", "GTS CA 1C3", "GTS Root R1"},
+ },
+ // CAPI doesn't build the chain with the duplicated GeoTrust
+ // entry so the results don't match.
+ systemLax: true,
+ },
+ {
+ name: "dnssec-exp",
+ leaf: dnssecExpLeaf,
+ intermediates: []string{startComIntermediate},
+ roots: []string{startComRoot},
+ currentTime: 1302726541,
+
+ // The StartCom root is not trusted by Windows when the default
+ // ServerAuth EKU is requested.
+ systemSkip: true,
+
+ expectedChains: [][]string{
+ {"dnssec-exp", "StartCom Class 1", "StartCom Certification Authority"},
+ },
+ },
+ {
+ name: "dnssec-exp/AnyEKU",
+ leaf: dnssecExpLeaf,
+ intermediates: []string{startComIntermediate},
+ roots: []string{startComRoot},
+ currentTime: 1302726541,
+ keyUsages: []ExtKeyUsage{ExtKeyUsageAny},
+
+ expectedChains: [][]string{
+ {"dnssec-exp", "StartCom Class 1", "StartCom Certification Authority"},
+ },
+ },
+ {
+ name: "dnssec-exp/RootInIntermediates",
+ leaf: dnssecExpLeaf,
+ intermediates: []string{startComIntermediate, startComRoot},
+ roots: []string{startComRoot},
+ currentTime: 1302726541,
+ systemSkip: true, // see dnssec-exp test
+
+ expectedChains: [][]string{
+ {"dnssec-exp", "StartCom Class 1", "StartCom Certification Authority"},
+ },
+ },
+ {
+ name: "InvalidHash",
+ leaf: googleLeafWithInvalidHash,
+ intermediates: []string{gtsIntermediate},
+ roots: []string{gtsRoot},
+ currentTime: 1677615892,
+ dnsName: "www.google.com",
+
+ // The specific error message may not occur when using system
+ // verification.
+ systemLax: true,
+ errorCallback: expectHashError,
+ },
+ // EKULeaf tests use an unconstrained chain leading to a leaf certificate
+ // with an E-mail Protection EKU but not a Server Auth one, checking that
+ // the EKUs on the leaf are enforced.
+ {
+ name: "EKULeaf",
+ leaf: smimeLeaf,
+ intermediates: []string{smimeIntermediate},
+ roots: []string{smimeRoot},
+ currentTime: 1594673418,
+
+ errorCallback: expectUsageError,
+ },
+ {
+ name: "EKULeafExplicit",
+ leaf: smimeLeaf,
+ intermediates: []string{smimeIntermediate},
+ roots: []string{smimeRoot},
+ currentTime: 1594673418,
+ keyUsages: []ExtKeyUsage{ExtKeyUsageServerAuth},
+
+ errorCallback: expectUsageError,
+ },
+ {
+ name: "EKULeafValid",
+ leaf: smimeLeaf,
+ intermediates: []string{smimeIntermediate},
+ roots: []string{smimeRoot},
+ currentTime: 1594673418,
+ keyUsages: []ExtKeyUsage{ExtKeyUsageEmailProtection},
+
+ expectedChains: [][]string{
+ {"CORPORATIVO FICTICIO ACTIVO", "EAEko Herri Administrazioen CA - CA AAPP Vascas (2)", "IZENPE S.A."},
+ },
+ },
+ {
+ // Check that a name constrained intermediate works even when
+ // it lists multiple constraints.
+ name: "MultipleConstraints",
+ leaf: nameConstraintsLeaf,
+ intermediates: []string{nameConstraintsIntermediate1, nameConstraintsIntermediate2},
+ roots: []string{globalSignRoot},
+ currentTime: 1382387896,
+ dnsName: "secure.iddl.vt.edu",
+
+ expectedChains: [][]string{
+ {
+ "Technology-enhanced Learning and Online Strategies",
+ "Virginia Tech Global Qualified Server CA",
+ "Trusted Root CA G2",
+ "GlobalSign Root CA",
+ },
+ },
+ },
+ {
+ // Check that SHA-384 intermediates (which are popping up)
+ // work.
+ name: "SHA-384",
+ leaf: trustAsiaLeaf,
+ intermediates: []string{trustAsiaSHA384Intermediate},
+ roots: []string{digicertRoot},
+ currentTime: 1558051200,
+ dnsName: "tm.cn",
+
+ // CryptoAPI can find alternative validation paths.
+ systemLax: true,
+
+ expectedChains: [][]string{
+ {
+ "tm.cn",
+ "TrustAsia ECC OV TLS Pro CA",
+ "DigiCert Global Root CA",
+ },
+ },
+ },
+ {
+ // Putting a certificate as a root directly should work as a
+ // way of saying “exactly this”.
+ name: "LeafInRoots",
+ leaf: selfSigned,
+ roots: []string{selfSigned},
+ currentTime: 1471624472,
+ dnsName: "foo.example",
+ systemSkip: true, // does not chain to a system root
+
+ expectedChains: [][]string{
+ {"Acme Co"},
+ },
+ },
+ {
+ // Putting a certificate as a root directly should not skip
+ // other checks however.
+ name: "LeafInRootsInvalid",
+ leaf: selfSigned,
+ roots: []string{selfSigned},
+ currentTime: 1471624472,
+ dnsName: "notfoo.example",
+ systemSkip: true, // does not chain to a system root
+
+ errorCallback: expectHostnameError("certificate is valid for"),
+ },
+ {
+ // An X.509 v1 certificate should not be accepted as an
+ // intermediate.
+ name: "X509v1Intermediate",
+ leaf: x509v1TestLeaf,
+ intermediates: []string{x509v1TestIntermediate},
+ roots: []string{x509v1TestRoot},
+ currentTime: 1481753183,
+ systemSkip: true, // does not chain to a system root
+
+ errorCallback: expectNotAuthorizedError,
+ },
+ {
+ name: "IgnoreCNWithSANs",
+ leaf: ignoreCNWithSANLeaf,
+ dnsName: "foo.example.com",
+ roots: []string{ignoreCNWithSANRoot},
+ currentTime: 1486684488,
+ systemSkip: true, // does not chain to a system root
+
+ errorCallback: expectHostnameError("certificate is not valid for any names"),
+ },
+ {
+ // Test that excluded names are respected.
+ name: "ExcludedNames",
+ leaf: excludedNamesLeaf,
+ dnsName: "bender.local",
+ intermediates: []string{excludedNamesIntermediate},
+ roots: []string{excludedNamesRoot},
+ currentTime: 1486684488,
+ systemSkip: true, // does not chain to a system root
+
+ errorCallback: expectNameConstraintsError,
+ },
+ {
+ // Test that unknown critical extensions in a leaf cause a
+ // verify error.
+ name: "CriticalExtLeaf",
+ leaf: criticalExtLeafWithExt,
+ intermediates: []string{criticalExtIntermediate},
+ roots: []string{criticalExtRoot},
+ currentTime: 1486684488,
+ systemSkip: true, // does not chain to a system root
+
+ errorCallback: expectUnhandledCriticalExtension,
+ },
+ {
+ // Test that unknown critical extensions in an intermediate
+ // cause a verify error.
+ name: "CriticalExtIntermediate",
+ leaf: criticalExtLeaf,
+ intermediates: []string{criticalExtIntermediateWithExt},
+ roots: []string{criticalExtRoot},
+ currentTime: 1486684488,
+ systemSkip: true, // does not chain to a system root
+
+ errorCallback: expectUnhandledCriticalExtension,
+ },
+ {
+ name: "ValidCN",
+ leaf: validCNWithoutSAN,
+ dnsName: "foo.example.com",
+ roots: []string{invalidCNRoot},
+ currentTime: 1540000000,
+ systemSkip: true, // does not chain to a system root
+
+ errorCallback: expectHostnameError("certificate relies on legacy Common Name field"),
+ },
+ {
+ // A certificate with an AKID should still chain to a parent without SKID.
+ // See Issue 30079.
+ name: "AKIDNoSKID",
+ leaf: leafWithAKID,
+ roots: []string{rootWithoutSKID},
+ currentTime: 1550000000,
+ dnsName: "example",
+ systemSkip: true, // does not chain to a system root
+
+ expectedChains: [][]string{
+ {"Acme LLC", "Acme Co"},
+ },
+ },
+ {
+ // When there are two parents, one with a incorrect subject but matching SKID
+ // and one with a correct subject but missing SKID, the latter should be
+ // considered as a possible parent.
+ leaf: leafMatchingAKIDMatchingIssuer,
+ roots: []string{rootMatchingSKIDMismatchingSubject, rootMismatchingSKIDMatchingSubject},
+ currentTime: 1550000000,
+ dnsName: "example",
+ systemSkip: true,
+
+ expectedChains: [][]string{
+ {"Leaf", "Root B"},
+ },
+ },
+}
+
+func expectHostnameError(msg string) func(*testing.T, error) {
+ return func(t *testing.T, err error) {
+ if _, ok := err.(HostnameError); !ok {
+ t.Fatalf("error was not a HostnameError: %v", err)
+ }
+ if !strings.Contains(err.Error(), msg) {
+ t.Fatalf("HostnameError did not contain %q: %v", msg, err)
+ }
+ }
+}
+
+func expectExpired(t *testing.T, err error) {
+ if inval, ok := err.(CertificateInvalidError); !ok || inval.Reason != Expired {
+ t.Fatalf("error was not Expired: %v", err)
+ }
+}
+
+func expectUsageError(t *testing.T, err error) {
+ if inval, ok := err.(CertificateInvalidError); !ok || inval.Reason != IncompatibleUsage {
+ t.Fatalf("error was not IncompatibleUsage: %v", err)
+ }
+}
+
+func expectAuthorityUnknown(t *testing.T, err error) {
+ e, ok := err.(UnknownAuthorityError)
+ if !ok {
+ t.Fatalf("error was not UnknownAuthorityError: %v", err)
+ }
+ if e.Cert == nil {
+ t.Fatalf("error was UnknownAuthorityError, but missing Cert: %v", err)
+ }
+}
+
+func expectHashError(t *testing.T, err error) {
+ if err == nil {
+ t.Fatalf("no error resulted from invalid hash")
+ }
+ if expected := "algorithm unimplemented"; !strings.Contains(err.Error(), expected) {
+ t.Fatalf("error resulting from invalid hash didn't contain '%s', rather it was: %v", expected, err)
+ }
+}
+
+func expectNameConstraintsError(t *testing.T, err error) {
+ if inval, ok := err.(CertificateInvalidError); !ok || inval.Reason != CANotAuthorizedForThisName {
+ t.Fatalf("error was not a CANotAuthorizedForThisName: %v", err)
+ }
+}
+
+func expectNotAuthorizedError(t *testing.T, err error) {
+ if inval, ok := err.(CertificateInvalidError); !ok || inval.Reason != NotAuthorizedToSign {
+ t.Fatalf("error was not a NotAuthorizedToSign: %v", err)
+ }
+}
+
+func expectUnhandledCriticalExtension(t *testing.T, err error) {
+ if _, ok := err.(UnhandledCriticalExtension); !ok {
+ t.Fatalf("error was not an UnhandledCriticalExtension: %v", err)
+ }
+}
+
+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, test verifyTest, useSystemRoots bool) {
+ 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.Fatalf("failed to parse root #%d", j)
+ }
+ }
+ }
+
+ for j, intermediate := range test.intermediates {
+ ok := opts.Intermediates.AppendCertsFromPEM([]byte(intermediate))
+ if !ok {
+ t.Fatalf("failed to parse intermediate #%d", j)
+ }
+ }
+
+ leaf, err := certificateFromPEM(test.leaf)
+ if err != nil {
+ t.Fatalf("failed to parse leaf: %v", err)
+ }
+
+ chains, err := leaf.Verify(opts)
+
+ if test.errorCallback == nil && err != nil {
+ if runtime.GOOS == "windows" && strings.HasSuffix(testenv.Builder(), "-2008") && err.Error() == "x509: certificate signed by unknown authority" {
+ testenv.SkipFlaky(t, 19564)
+ }
+ t.Fatalf("unexpected error: %v", err)
+ }
+ if test.errorCallback != nil {
+ if useSystemRoots && test.systemLax {
+ if err == nil {
+ t.Fatalf("expected error")
+ }
+ } else {
+ test.errorCallback(t, err)
+ }
+ }
+
+ doesMatch := func(expectedChain []string, chain []*Certificate) bool {
+ if len(chain) != len(expectedChain) {
+ return false
+ }
+
+ for k, cert := range chain {
+ if !strings.Contains(nameToKey(&cert.Subject), expectedChain[k]) {
+ return false
+ }
+ }
+ return true
+ }
+
+ // Every expected chain should match one (or more) returned chain. We tolerate multiple
+ // matches, as due to root store semantics it is plausible that (at least on the system
+ // verifiers) multiple identical (looking) chains may be returned when two roots with the
+ // same subject are present.
+ for _, expectedChain := range test.expectedChains {
+ var match bool
+ for _, chain := range chains {
+ if doesMatch(expectedChain, chain) {
+ match = true
+ break
+ }
+ }
+
+ if !match {
+ t.Errorf("No match found for %v", expectedChain)
+ }
+ }
+
+ // Every returned chain should match 1 expected chain (or <2 if testing against the system)
+ for _, chain := range chains {
+ nMatched := 0
+ for _, expectedChain := range test.expectedChains {
+ if doesMatch(expectedChain, chain) {
+ nMatched++
+ }
+ }
+ // Allow additional unknown chains if systemLax is set
+ if nMatched == 0 && test.systemLax == false || nMatched > 1 {
+ t.Errorf("Got %v matches for chain %v", nMatched, chainToDebugString(chain))
+ for _, expectedChain := range test.expectedChains {
+ if doesMatch(expectedChain, chain) {
+ t.Errorf("\t matched %v", expectedChain)
+ }
+ }
+ }
+ }
+}
+
+func TestGoVerify(t *testing.T) {
+ // Temporarily enable SHA-1 verification since a number of test chains
+ // require it. TODO(filippo): regenerate test chains.
+ t.Setenv("GODEBUG", "x509sha1=1")
+
+ for _, test := range verifyTests {
+ t.Run(test.name, func(t *testing.T) {
+ testVerify(t, test, false)
+ })
+ }
+}
+
+func TestSystemVerify(t *testing.T) {
+ if runtime.GOOS != "windows" {
+ t.Skipf("skipping verify test using system APIs on %q", runtime.GOOS)
+ }
+
+ for _, test := range verifyTests {
+ t.Run(test.name, func(t *testing.T) {
+ if test.systemSkip {
+ t.SkipNow()
+ }
+ testVerify(t, test, 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 gtsIntermediate = `-----BEGIN CERTIFICATE-----
+MIIFljCCA36gAwIBAgINAgO8U1lrNMcY9QFQZjANBgkqhkiG9w0BAQsFADBHMQsw
+CQYDVQQGEwJVUzEiMCAGA1UEChMZR29vZ2xlIFRydXN0IFNlcnZpY2VzIExMQzEU
+MBIGA1UEAxMLR1RTIFJvb3QgUjEwHhcNMjAwODEzMDAwMDQyWhcNMjcwOTMwMDAw
+MDQyWjBGMQswCQYDVQQGEwJVUzEiMCAGA1UEChMZR29vZ2xlIFRydXN0IFNlcnZp
+Y2VzIExMQzETMBEGA1UEAxMKR1RTIENBIDFDMzCCASIwDQYJKoZIhvcNAQEBBQAD
+ggEPADCCAQoCggEBAPWI3+dijB43+DdCkH9sh9D7ZYIl/ejLa6T/belaI+KZ9hzp
+kgOZE3wJCor6QtZeViSqejOEH9Hpabu5dOxXTGZok3c3VVP+ORBNtzS7XyV3NzsX
+lOo85Z3VvMO0Q+sup0fvsEQRY9i0QYXdQTBIkxu/t/bgRQIh4JZCF8/ZK2VWNAcm
+BA2o/X3KLu/qSHw3TT8An4Pf73WELnlXXPxXbhqW//yMmqaZviXZf5YsBvcRKgKA
+gOtjGDxQSYflispfGStZloEAoPtR28p3CwvJlk/vcEnHXG0g/Zm0tOLKLnf9LdwL
+tmsTDIwZKxeWmLnwi/agJ7u2441Rj72ux5uxiZ0CAwEAAaOCAYAwggF8MA4GA1Ud
+DwEB/wQEAwIBhjAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwEgYDVR0T
+AQH/BAgwBgEB/wIBADAdBgNVHQ4EFgQUinR/r4XN7pXNPZzQ4kYU83E1HScwHwYD
+VR0jBBgwFoAU5K8rJnEaK0gnhS9SZizv8IkTcT4waAYIKwYBBQUHAQEEXDBaMCYG
+CCsGAQUFBzABhhpodHRwOi8vb2NzcC5wa2kuZ29vZy9ndHNyMTAwBggrBgEFBQcw
+AoYkaHR0cDovL3BraS5nb29nL3JlcG8vY2VydHMvZ3RzcjEuZGVyMDQGA1UdHwQt
+MCswKaAnoCWGI2h0dHA6Ly9jcmwucGtpLmdvb2cvZ3RzcjEvZ3RzcjEuY3JsMFcG
+A1UdIARQME4wOAYKKwYBBAHWeQIFAzAqMCgGCCsGAQUFBwIBFhxodHRwczovL3Br
+aS5nb29nL3JlcG9zaXRvcnkvMAgGBmeBDAECATAIBgZngQwBAgIwDQYJKoZIhvcN
+AQELBQADggIBAIl9rCBcDDy+mqhXlRu0rvqrpXJxtDaV/d9AEQNMwkYUuxQkq/BQ
+cSLbrcRuf8/xam/IgxvYzolfh2yHuKkMo5uhYpSTld9brmYZCwKWnvy15xBpPnrL
+RklfRuFBsdeYTWU0AIAaP0+fbH9JAIFTQaSSIYKCGvGjRFsqUBITTcFTNvNCCK9U
++o53UxtkOCcXCb1YyRt8OS1b887U7ZfbFAO/CVMkH8IMBHmYJvJh8VNS/UKMG2Yr
+PxWhu//2m+OBmgEGcYk1KCTd4b3rGS3hSMs9WYNRtHTGnXzGsYZbr8w0xNPM1IER
+lQCh9BIiAfq0g3GvjLeMcySsN1PCAJA/Ef5c7TaUEDu9Ka7ixzpiO2xj2YC/WXGs
+Yye5TBeg2vZzFb8q3o/zpWwygTMD0IZRcZk0upONXbVRWPeyk+gB9lm+cZv9TSjO
+z23HFtz30dZGm6fKa+l3D/2gthsjgx0QGtkJAITgRNOidSOzNIb2ILCkXhAd4FJG
+AJ2xDx8hcFH1mt0G/FX0Kw4zd8NLQsLxdxP8c4CU6x+7Nz/OAipmsHMdMqUybDKw
+juDEI/9bfU1lcKwrmz3O2+BtjjKAvpafkmO8l7tdufThcV4q5O8DIrGKZTqPwJNl
+1IXNDw9bg1kWRxYtnCQ6yICmJhSFm/Y3m6xv+cXDBlHz4n/FsRC6UfTd
+-----END CERTIFICATE-----`
+
+const gtsRoot = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const googleLeaf = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+// googleLeafWithInvalidHash is the same as googleLeaf, but the signature
+// algorithm in the certificate contains a nonsense OID.
+const googleLeafWithInvalidHash = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const dnssecExpLeaf = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const startComIntermediate = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const startComRoot = `-----BEGIN CERTIFICATE-----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+ewT4F+irsfMuXGRuczE6Eri8sxHkfY+BUZo7jYn0TZNmezwD7dOaHZrzZVD1oNB1
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+EUTINFInzQpdn4XBidUaePKVEFMy3YCEZnXZtWgo+2EuvoSoOMCZEoalHmdkrQYu
+L6lwhceWD3yJZfWOQ1QOq92lgDmUYMA0yZZwLKMS9R9Ie70cfmu3nZD0Ijuu+Pwq
+yvqCUqDvr0tVk+vBtfAii6w0TiYiBKGHLHVKt+V9E9e4DGTANtLJL4YSjCMJwRuC
+O3NJo2pXh5Tl1njFmUNj403gdy3hZZlyaQQaRwnmDwFWJPsfvw55qVguucQJAX6V
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+NOsF/5oirpt9P/FlUQqmMGqz9IgcgA38corog14=
+-----END CERTIFICATE-----`
+
+const smimeLeaf = `-----BEGIN CERTIFICATE-----
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+BGI7L1MnGJBv8RfP/TL67aJ5bgq2ri4S8vGHtXSjcZ0+rCEOLJtmDNMnTZxancg3
+/H5edeNd+n6Z48LO+JHRxQufbC4mVNxVLMIP9EkGUejlq4E4w6zb5NwCQczJbSWL
+i31rk2orsNsDlyaLGsWZp3JSNX6RmodU4KAUPor4jUJuUhrrm3Spb73gKlV/gcIw
+bCE7mML1Kss3x1ySaXsis6SZtLpGWKkW2iguPWPs0ydV6RPhmsCxieMwPPIJ87vS
+5IejfgyBae7RSuAIHyNFy4uI5xwvwUFf6OZ7az8qtW7ImFOgng3Ds+W9k1S2CNTx
+d0cnKTfA6IpjGo8EeHcxnIXT8NPImWaRj0qqonvYady7ci6U4m3lkNSdXNn1afgw
+mYust+gxVtOZs1gk2MUCgJ1V1X+g7r/Cg7viIn6TLkLrpS1kS1hvMqkl9M+7XqPo
+Qd95nJKOkusQpy99X4dF/lfbYAQnnjnqh3DLD2gvYObXFaAYFaiBKTiMTV2X72F+
+-----END CERTIFICATE-----`
+
+const smimeIntermediate = `-----BEGIN CERTIFICATE-----
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+xUYTijV4ph2gL6exwuG7pxfRcVNHYlrRaXWfTz3F6NBKyULxrI3P/y6JAtN1GqT4
+VF/+vMygx22n0DufGepBwTQz6/rr1ulSZ+eMnuJiTXgh/BzQnkUsXTb8mHII25iR
+0oYF2qAsk6ecWbLiDpkHKIDHmML21MZE13MS8NSvTHoqJO4LyAmDe6SaeNHtrPlK
+b6mzE1BN2ug+ZaX8wLA5IMPFaf0jKhb/Cxu8INsxjt00brsErCc9ip1VNaH0M4bi
+1tGxfiew2436FaeyUxW7Pl6G5GgkNbuUc7QIoRy06DdU/U38BxW3uyJMY60zwHvS
+FlKAn0OvYp4niKhAJwaBVN3kowmJuOU5Rid+TUnfyxbJ9cttSgzaF3hP/N4zgMEM
+5tikXUskeckt8LUK96EH0QyssavAMECUEb/xrupyRdYWwjQGvNLq6T5+fViDGyOw
+k+lzD44wofy8paAy9uC9Owae0zMEzhcsyRm7
+-----END CERTIFICATE-----`
+
+const smimeRoot = `-----BEGIN CERTIFICATE-----
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+hij+0rnq49qlw0dpEuDb8PYZi+17cNcC1u2HGCgsBCRMd+RIihrGO5rUD8r6ddIB
+QFqNeb+Lz0vPqhbBleStTIo+F5HUsWLlguWABKQDfo2/2n+iD5dPDNMN+9fR5XJ+
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+JNu0FXWuDYi6LnPAvViH5ULy617uHjAimcs30cQhbIHsvm0m5hzkQiCeR7Csg1lw
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+VyvehQP5aTfLnnhqBbTFMXiJ7HqnheG5ezzevh55hM6fcA5ZwjUukCox2eRFekGk
+LhObNA5me0mrZJfQRsN5nXJQY6aYWwa9SG3YOYNw6DXwBdGqvOPbyALqfP2C2sJb
+UjWumDqtujWTI6cfSN01RpiyEGjkpTHCClguGYEQyVB1/OpaFs4R1+7vUIgtYf8/
+QnMFlEPVjjxOAToZpR9GTnfQXeWBIiGH/pR9hNiTrdZoQ0iy2+tzJOeRf1SktoA+
+naM8THLCV8Sg1Mw4J87VBp6iSNnpn86CcDaTmjvfliHjWbcM2pE38P1ZWrOZyGls
+QyYBNWNgVYkDOnXYukrZVP/u3oDYLdE41V4tC5h9Pmzb/CaIxw==
+-----END CERTIFICATE-----`
+
+var nameConstraintsLeaf = `-----BEGIN CERTIFICATE-----
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+GBUwDrQNTb+gsXsDkjd5lcYxNx6l
+-----END CERTIFICATE-----`
+
+var nameConstraintsIntermediate1 = `-----BEGIN CERTIFICATE-----
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+jUY+v9vLQXmaVwI0AYL7g9LN
+-----END CERTIFICATE-----`
+
+var nameConstraintsIntermediate2 = `-----BEGIN CERTIFICATE-----
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+hcC8roQwkHT7HvfYBoc74FM=
+-----END CERTIFICATE-----`
+
+var globalSignRoot = `-----BEGIN CERTIFICATE-----
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+HMUfpIBvFSDJ3gyICh3WZlXi/EjJKSZp4A==
+-----END CERTIFICATE-----`
+
+const digicertRoot = `-----BEGIN CERTIFICATE-----
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+CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=
+-----END CERTIFICATE-----`
+
+const trustAsiaSHA384Intermediate = `-----BEGIN CERTIFICATE-----
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+A1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjASBgNVHRMBAf8ECDAGAQH/AgEA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+-----END CERTIFICATE-----`
+
+const trustAsiaLeaf = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const selfSigned = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`
+
+const issuerSubjectMatchRoot = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const issuerSubjectMatchLeaf = `-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----`
+
+const x509v1TestRoot = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const x509v1TestIntermediate = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const x509v1TestLeaf = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const ignoreCNWithSANRoot = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const ignoreCNWithSANLeaf = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const excludedNamesLeaf = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const excludedNamesIntermediate = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const excludedNamesRoot = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`
+
+const invalidCNRoot = `-----BEGIN CERTIFICATE-----
+MIIBFjCBvgIJAIsu4r+jb70UMAoGCCqGSM49BAMCMBQxEjAQBgNVBAsMCVRlc3Qg
+cm9vdDAeFw0xODA3MTExODMyMzVaFw0yODA3MDgxODMyMzVaMBQxEjAQBgNVBAsM
+CVRlc3Qgcm9vdDBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABF6oDgMg0LV6YhPj
+QXaPXYCc2cIyCdqp0ROUksRz0pOLTc5iY2nraUheRUD1vRRneq7GeXOVNn7uXONg
+oCGMjNwwCgYIKoZIzj0EAwIDRwAwRAIgDSiwgIn8g1lpruYH0QD1GYeoWVunfmrI
+XzZZl0eW/ugCICgOfXeZ2GGy3wIC0352BaC3a8r5AAb2XSGNe+e9wNN6
+-----END CERTIFICATE-----`
+
+const validCNWithoutSAN = `-----BEGIN CERTIFICATE-----
+MIIBJzCBzwIUB7q8t9mrDAL+UB1OFaMN5BEWFKQwCgYIKoZIzj0EAwIwFDESMBAG
+A1UECwwJVGVzdCByb290MB4XDTE4MDcxMTE4NDcyNFoXDTI4MDcwODE4NDcyNFow
+GjEYMBYGA1UEAwwPZm9vLmV4YW1wbGUuY29tMFkwEwYHKoZIzj0CAQYIKoZIzj0D
+AQcDQgAEp6Z8IjOnR38Iky1fYTUu2kVndvKXcxiwARJKGtW3b0E8uwVp9AZd/+sr
+p4ULTPdFToFAeqnGHbu62bkms8pQkDAKBggqhkjOPQQDAgNHADBEAiBTbNe3WWFR
+cqUYo0sNUuoV+tCTMDJUS+0PWIW4qBqCOwIgFHdLDn5PCk9kJpfc0O2qZx03hdq0
+h7olHCpY9yMRiz0=
+-----END CERTIFICATE-----`
+
+const rootWithoutSKID = `-----BEGIN CERTIFICATE-----
+MIIBbzCCARSgAwIBAgIQeCkq3C8SOX/JM5PqYTl9cDAKBggqhkjOPQQDAjASMRAw
+DgYDVQQKEwdBY21lIENvMB4XDTE5MDIwNDIyNTYzNFoXDTI5MDIwMTIyNTYzNFow
+EjEQMA4GA1UEChMHQWNtZSBDbzBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABISm
+jGlTr4dLOWT+BCTm2PzWRjk1DpLcSAh+Al8eB1Nc2eBWxYIH9qPirfatvqBOA4c5
+ZwycRpFoaw6O+EmXnVujTDBKMA4GA1UdDwEB/wQEAwICpDATBgNVHSUEDDAKBggr
+BgEFBQcDATAPBgNVHRMBAf8EBTADAQH/MBIGA1UdEQQLMAmCB2V4YW1wbGUwCgYI
+KoZIzj0EAwIDSQAwRgIhAMaBYWFCjTfn0MNyQ0QXvYT/iIFompkIqzw6wB7qjLrA
+AiEA3sn65V7G4tsjZEOpN0Jykn9uiTjqniqn/S/qmv8gIec=
+-----END CERTIFICATE-----`
+
+const leafWithAKID = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const rootMatchingSKIDMismatchingSubject = `-----BEGIN CERTIFICATE-----
+MIIBQjCB6aADAgECAgEAMAoGCCqGSM49BAMCMBExDzANBgNVBAMTBlJvb3QgQTAe
+Fw0wOTExMTAyMzAwMDBaFw0xOTExMDgyMzAwMDBaMBExDzANBgNVBAMTBlJvb3Qg
+QTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABPK4p1uXq2aAeDtKDHIokg2rTcPM
+2gq3N9Y96wiW6/7puBK1+INEW//cO9x6FpzkcsHw/TriAqy4sck/iDAvf9WjMjAw
+MA8GA1UdJQQIMAYGBFUdJQAwDwYDVR0TAQH/BAUwAwEB/zAMBgNVHQ4EBQQDAQID
+MAoGCCqGSM49BAMCA0gAMEUCIQDgtAp7iVHxMnKxZPaLQPC+Tv2r7+DJc88k2SKH
+MPs/wQIgFjjNvBoQEl7vSHTcRGCCcFMdlN4l0Dqc9YwGa9fyrQs=
+-----END CERTIFICATE-----`
+
+const rootMismatchingSKIDMatchingSubject = `-----BEGIN CERTIFICATE-----
+MIIBNDCB26ADAgECAgEAMAoGCCqGSM49BAMCMBExDzANBgNVBAMTBlJvb3QgQjAe
+Fw0wOTExMTAyMzAwMDBaFw0xOTExMDgyMzAwMDBaMBExDzANBgNVBAMTBlJvb3Qg
+QjBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABI1YRFcIlkWzm9BdEVrIsEQJ2dT6
+qiW8/WV9GoIhmDtX9SEDHospc0Cgm+TeD2QYW2iMrS5mvNe4GSw0Jezg/bOjJDAi
+MA8GA1UdJQQIMAYGBFUdJQAwDwYDVR0TAQH/BAUwAwEB/zAKBggqhkjOPQQDAgNI
+ADBFAiEAukWOiuellx8bugRiwCS5XQ6IOJ1SZcjuZxj76WojwxkCIHqa71qNw8FM
+DtA5yoL9M2pDFF6ovFWnaCe+KlzSwAW/
+-----END CERTIFICATE-----`
+
+const leafMatchingAKIDMatchingIssuer = `-----BEGIN CERTIFICATE-----
+MIIBNTCB26ADAgECAgEAMAoGCCqGSM49BAMCMBExDzANBgNVBAMTBlJvb3QgQjAe
+Fw0wOTExMTAyMzAwMDBaFw0xOTExMDgyMzAwMDBaMA8xDTALBgNVBAMTBExlYWYw
+WTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASNWERXCJZFs5vQXRFayLBECdnU+qol
+vP1lfRqCIZg7V/UhAx6LKXNAoJvk3g9kGFtojK0uZrzXuBksNCXs4P2zoyYwJDAO
+BgNVHSMEBzAFgAMBAgMwEgYDVR0RBAswCYIHZXhhbXBsZTAKBggqhkjOPQQDAgNJ
+ADBGAiEAnV9XV7a4h0nfJB8pWv+pBUXRlRFA2uZz3mXEpee8NYACIQCWa+wL70GL
+ePBQCV1F9sE2q4ZrnsT9TZoNrSe/bMDjzA==
+-----END CERTIFICATE-----`
+
+var unknownAuthorityErrorTests = []struct {
+ name string
+ cert string
+ expected string
+}{
+ {"self-signed, cn", selfSignedWithCommonName, "x509: certificate signed by unknown authority (possibly because of \"empty\" while trying to verify candidate authority certificate \"test\")"},
+ {"self-signed, no cn, org", selfSignedNoCommonNameWithOrgName, "x509: certificate signed by unknown authority (possibly because of \"empty\" while trying to verify candidate authority certificate \"ca\")"},
+ {"self-signed, no cn, no org", selfSignedNoCommonNameNoOrgName, "x509: certificate signed by unknown authority (possibly because of \"empty\" while trying to verify candidate authority certificate \"serial:0\")"},
+}
+
+func TestUnknownAuthorityError(t *testing.T) {
+ for i, tt := range unknownAuthorityErrorTests {
+ t.Run(tt.name, func(t *testing.T) {
+ der, _ := pem.Decode([]byte(tt.cert))
+ if der == nil {
+ t.Fatalf("#%d: Unable to decode PEM block", i)
+ }
+ c, err := ParseCertificate(der.Bytes)
+ if err != nil {
+ t.Fatalf("#%d: Unable to parse certificate -> %v", i, err)
+ }
+ uae := &UnknownAuthorityError{
+ Cert: c,
+ hintErr: fmt.Errorf("empty"),
+ hintCert: c,
+ }
+ actual := uae.Error()
+ if actual != tt.expected {
+ t.Errorf("#%d: UnknownAuthorityError.Error() response invalid actual: %s expected: %s", i, actual, tt.expected)
+ }
+ })
+ }
+}
+
+var nameConstraintTests = []struct {
+ constraint, domain string
+ expectError bool
+ shouldMatch bool
+}{
+ {"", "anything.com", false, true},
+ {"example.com", "example.com", false, true},
+ {"example.com.", "example.com", true, false},
+ {"example.com", "example.com.", true, false},
+ {"example.com", "ExAmPle.coM", false, true},
+ {"example.com", "exampl1.com", false, false},
+ {"example.com", "www.ExAmPle.coM", false, true},
+ {"example.com", "sub.www.ExAmPle.coM", false, true},
+ {"example.com", "notexample.com", false, false},
+ {".example.com", "example.com", false, false},
+ {".example.com", "www.example.com", false, true},
+ {".example.com", "www..example.com", true, false},
+}
+
+func TestNameConstraints(t *testing.T) {
+ for i, test := range nameConstraintTests {
+ result, err := matchDomainConstraint(test.domain, test.constraint)
+
+ if err != nil && !test.expectError {
+ t.Errorf("unexpected error for test #%d: domain=%s, constraint=%s, err=%s", i, test.domain, test.constraint, err)
+ continue
+ }
+
+ if err == nil && test.expectError {
+ t.Errorf("unexpected success for test #%d: domain=%s, constraint=%s", i, test.domain, test.constraint)
+ continue
+ }
+
+ if result != test.shouldMatch {
+ t.Errorf("unexpected result for test #%d: domain=%s, constraint=%s, result=%t", i, test.domain, test.constraint, result)
+ }
+ }
+}
+
+const selfSignedWithCommonName = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+const selfSignedNoCommonNameWithOrgName = `-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----`
+const selfSignedNoCommonNameNoOrgName = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const criticalExtRoot = `-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----`
+
+const criticalExtIntermediate = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const criticalExtLeafWithExt = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+const criticalExtIntermediateWithExt = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`
+
+const criticalExtLeaf = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`
+
+func TestValidHostname(t *testing.T) {
+ tests := []struct {
+ host string
+ validInput, validPattern bool
+ }{
+ {host: "example.com", validInput: true, validPattern: true},
+ {host: "eXample123-.com", validInput: true, validPattern: true},
+ {host: "-eXample123-.com"},
+ {host: ""},
+ {host: "."},
+ {host: "example..com"},
+ {host: ".example.com"},
+ {host: "example.com.", validInput: true},
+ {host: "*.example.com."},
+ {host: "*.example.com", validPattern: true},
+ {host: "*foo.example.com"},
+ {host: "foo.*.example.com"},
+ {host: "exa_mple.com", validInput: true, validPattern: true},
+ {host: "foo,bar"},
+ {host: "project-dev:us-central1:main"},
+ }
+ for _, tt := range tests {
+ if got := validHostnamePattern(tt.host); got != tt.validPattern {
+ t.Errorf("validHostnamePattern(%q) = %v, want %v", tt.host, got, tt.validPattern)
+ }
+ if got := validHostnameInput(tt.host); got != tt.validInput {
+ t.Errorf("validHostnameInput(%q) = %v, want %v", tt.host, got, tt.validInput)
+ }
+ }
+}
+
+func generateCert(cn string, isCA bool, issuer *Certificate, issuerKey crypto.PrivateKey) (*Certificate, crypto.PrivateKey, error) {
+ priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
+ serialNumber, _ := rand.Int(rand.Reader, serialNumberLimit)
+
+ template := &Certificate{
+ SerialNumber: serialNumber,
+ Subject: pkix.Name{CommonName: cn},
+ NotBefore: time.Now().Add(-1 * time.Hour),
+ NotAfter: time.Now().Add(24 * time.Hour),
+
+ KeyUsage: KeyUsageKeyEncipherment | KeyUsageDigitalSignature | KeyUsageCertSign,
+ ExtKeyUsage: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ BasicConstraintsValid: true,
+ IsCA: isCA,
+ }
+ if issuer == nil {
+ issuer = template
+ issuerKey = priv
+ }
+
+ derBytes, err := CreateCertificate(rand.Reader, template, issuer, priv.Public(), issuerKey)
+ if err != nil {
+ return nil, nil, err
+ }
+ cert, err := ParseCertificate(derBytes)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ return cert, priv, nil
+}
+
+func TestPathologicalChain(t *testing.T) {
+ if testing.Short() {
+ t.Skip("skipping generation of a long chain of certificates in short mode")
+ }
+
+ // Build a chain where all intermediates share the same subject, to hit the
+ // path building worst behavior.
+ roots, intermediates := NewCertPool(), NewCertPool()
+
+ parent, parentKey, err := generateCert("Root CA", true, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ roots.AddCert(parent)
+
+ for i := 1; i < 100; i++ {
+ parent, parentKey, err = generateCert("Intermediate CA", true, parent, parentKey)
+ if err != nil {
+ t.Fatal(err)
+ }
+ intermediates.AddCert(parent)
+ }
+
+ leaf, _, err := generateCert("Leaf", false, parent, parentKey)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ start := time.Now()
+ _, err = leaf.Verify(VerifyOptions{
+ Roots: roots,
+ Intermediates: intermediates,
+ })
+ t.Logf("verification took %v", time.Since(start))
+
+ if err == nil || !strings.Contains(err.Error(), "signature check attempts limit") {
+ t.Errorf("expected verification to fail with a signature checks limit error; got %v", err)
+ }
+}
+
+func TestLongChain(t *testing.T) {
+ if testing.Short() {
+ t.Skip("skipping generation of a long chain of certificates in short mode")
+ }
+
+ roots, intermediates := NewCertPool(), NewCertPool()
+
+ parent, parentKey, err := generateCert("Root CA", true, nil, nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ roots.AddCert(parent)
+
+ for i := 1; i < 15; i++ {
+ name := fmt.Sprintf("Intermediate CA #%d", i)
+ parent, parentKey, err = generateCert(name, true, parent, parentKey)
+ if err != nil {
+ t.Fatal(err)
+ }
+ intermediates.AddCert(parent)
+ }
+
+ leaf, _, err := generateCert("Leaf", false, parent, parentKey)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ start := time.Now()
+ if _, err := leaf.Verify(VerifyOptions{
+ Roots: roots,
+ Intermediates: intermediates,
+ }); err != nil {
+ t.Error(err)
+ }
+ t.Logf("verification took %v", time.Since(start))
+}
+
+func TestSystemRootsError(t *testing.T) {
+ if runtime.GOOS == "windows" || runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
+ t.Skip("Windows and darwin do not use (or support) systemRoots")
+ }
+
+ defer func(oldSystemRoots *CertPool) { systemRoots = oldSystemRoots }(systemRootsPool())
+
+ opts := VerifyOptions{
+ Intermediates: NewCertPool(),
+ DNSName: "www.google.com",
+ CurrentTime: time.Unix(1677615892, 0),
+ }
+
+ if ok := opts.Intermediates.AppendCertsFromPEM([]byte(gtsIntermediate)); !ok {
+ t.Fatalf("failed to parse intermediate")
+ }
+
+ leaf, err := certificateFromPEM(googleLeaf)
+ if err != nil {
+ t.Fatalf("failed to parse leaf: %v", err)
+ }
+
+ systemRoots = nil
+
+ _, err = leaf.Verify(opts)
+ if _, ok := err.(SystemRootsError); !ok {
+ t.Errorf("error was not SystemRootsError: %v", err)
+ }
+}
+
+func TestSystemRootsErrorUnwrap(t *testing.T) {
+ var err1 = errors.New("err1")
+ err := SystemRootsError{Err: err1}
+ if !errors.Is(err, err1) {
+ t.Error("errors.Is failed, wanted success")
+ }
+}
+
+func macosMajorVersion(t *testing.T) (int, error) {
+ cmd := testenv.Command(t, "sw_vers", "-productVersion")
+ out, err := cmd.Output()
+ if err != nil {
+ if ee, ok := err.(*exec.ExitError); ok && len(ee.Stderr) > 0 {
+ return 0, fmt.Errorf("%v: %v\n%s", cmd, err, ee.Stderr)
+ }
+ return 0, fmt.Errorf("%v: %v", cmd, err)
+ }
+ before, _, ok := strings.Cut(string(out), ".")
+ major, err := strconv.Atoi(before)
+ if !ok || err != nil {
+ return 0, fmt.Errorf("%v: unexpected output: %q", cmd, out)
+ }
+
+ return major, nil
+}
+
+func TestIssue51759(t *testing.T) {
+ if runtime.GOOS != "darwin" {
+ t.Skip("only affects darwin")
+ }
+
+ testenv.MustHaveExecPath(t, "sw_vers")
+ if vers, err := macosMajorVersion(t); err != nil {
+ if builder := testenv.Builder(); builder != "" {
+ t.Fatalf("unable to determine macOS version: %s", err)
+ } else {
+ t.Skip("unable to determine macOS version")
+ }
+ } else if vers < 11 {
+ t.Skip("behavior only enforced in macOS 11 and after")
+ }
+
+ // badCertData contains a cert that we parse as valid
+ // but that macOS SecCertificateCreateWithData rejects.
+ const badCertData = "0\x82\x01U0\x82\x01\a\xa0\x03\x02\x01\x02\x02\x01\x020\x05\x06\x03+ep0R1P0N\x06\x03U\x04\x03\x13Gderpkey8dc58100b2493614ee1692831a461f3f4dd3f9b3b088e244f887f81b4906ac260\x1e\x17\r220112235755Z\x17\r220313235755Z0R1P0N\x06\x03U\x04\x03\x13Gderpkey8dc58100b2493614ee1692831a461f3f4dd3f9b3b088e244f887f81b4906ac260*0\x05\x06\x03+ep\x03!\x00bA\xd8e\xadW\xcb\xefZ\x89\xb5\"\x1eR\x9d\xba\x0e:\x1042Q@\u007f\xbd\xfb{ks\x04\xd1£\x020\x000\x05\x06\x03+ep\x03A\x00[\xa7\x06y\x86(\x94\x97\x9eLwA\x00\x01x\xaa\xbc\xbd Ê]\n(΅!ف0\xf5\x9a%I\x19<\xffo\xf1\xeaaf@\xb1\xa7\xaf\xfd\xe9R\xc7\x0f\x8d&\xd5\xfc\x0f;Ϙ\x82\x84a\xbc\r"
+ badCert, err := ParseCertificate([]byte(badCertData))
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ t.Run("leaf", func(t *testing.T) {
+ opts := VerifyOptions{}
+ expectedErr := "invalid leaf certificate"
+ _, err = badCert.Verify(opts)
+ if err == nil || err.Error() != expectedErr {
+ t.Fatalf("unexpected error: want %q, got %q", expectedErr, err)
+ }
+ })
+
+ goodCert, err := certificateFromPEM(googleLeaf)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ t.Run("intermediate", func(t *testing.T) {
+ opts := VerifyOptions{
+ Intermediates: NewCertPool(),
+ }
+ opts.Intermediates.AddCert(badCert)
+ expectedErr := "SecCertificateCreateWithData: invalid certificate"
+ _, err = goodCert.Verify(opts)
+ if err == nil || err.Error() != expectedErr {
+ t.Fatalf("unexpected error: want %q, got %q", expectedErr, err)
+ }
+ })
+}
+
+type trustGraphEdge struct {
+ Issuer string
+ Subject string
+ Type int
+ MutateTemplate func(*Certificate)
+}
+
+type trustGraphDescription struct {
+ Roots []string
+ Leaf string
+ Graph []trustGraphEdge
+}
+
+func genCertEdge(t *testing.T, subject string, key crypto.Signer, mutateTmpl func(*Certificate), certType int, issuer *Certificate, signer crypto.Signer) *Certificate {
+ t.Helper()
+
+ serial, err := rand.Int(rand.Reader, big.NewInt(100))
+ if err != nil {
+ t.Fatalf("failed to generate test serial: %s", err)
+ }
+ tmpl := &Certificate{
+ SerialNumber: serial,
+ Subject: pkix.Name{CommonName: subject},
+ NotBefore: time.Now().Add(-time.Hour),
+ NotAfter: time.Now().Add(time.Hour),
+ }
+ if certType == rootCertificate || certType == intermediateCertificate {
+ tmpl.IsCA, tmpl.BasicConstraintsValid = true, true
+ tmpl.KeyUsage = KeyUsageCertSign
+ } else if certType == leafCertificate {
+ tmpl.DNSNames = []string{"localhost"}
+ }
+ if mutateTmpl != nil {
+ mutateTmpl(tmpl)
+ }
+
+ if certType == rootCertificate {
+ issuer = tmpl
+ signer = key
+ }
+
+ d, err := CreateCertificate(rand.Reader, tmpl, issuer, key.Public(), signer)
+ if err != nil {
+ t.Fatalf("failed to generate test cert: %s", err)
+ }
+ c, err := ParseCertificate(d)
+ if err != nil {
+ t.Fatalf("failed to parse test cert: %s", err)
+ }
+ return c
+}
+
+func buildTrustGraph(t *testing.T, d trustGraphDescription) (*CertPool, *CertPool, *Certificate) {
+ t.Helper()
+
+ certs := map[string]*Certificate{}
+ keys := map[string]crypto.Signer{}
+ roots := []*Certificate{}
+ for _, r := range d.Roots {
+ k, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+ if err != nil {
+ t.Fatalf("failed to generate test key: %s", err)
+ }
+ root := genCertEdge(t, r, k, nil, rootCertificate, nil, nil)
+ roots = append(roots, root)
+ certs[r] = root
+ keys[r] = k
+ }
+
+ intermediates := []*Certificate{}
+ var leaf *Certificate
+ for _, e := range d.Graph {
+ issuerCert, ok := certs[e.Issuer]
+ if !ok {
+ t.Fatalf("unknown issuer %s", e.Issuer)
+ }
+ issuerKey, ok := keys[e.Issuer]
+ if !ok {
+ t.Fatalf("unknown issuer %s", e.Issuer)
+ }
+
+ k, ok := keys[e.Subject]
+ if !ok {
+ var err error
+ k, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+ if err != nil {
+ t.Fatalf("failed to generate test key: %s", err)
+ }
+ keys[e.Subject] = k
+ }
+ cert := genCertEdge(t, e.Subject, k, e.MutateTemplate, e.Type, issuerCert, issuerKey)
+ certs[e.Subject] = cert
+ if e.Subject == d.Leaf {
+ leaf = cert
+ } else {
+ intermediates = append(intermediates, cert)
+ }
+ }
+
+ rootPool, intermediatePool := NewCertPool(), NewCertPool()
+ for i := len(roots) - 1; i >= 0; i-- {
+ rootPool.AddCert(roots[i])
+ }
+ for i := len(intermediates) - 1; i >= 0; i-- {
+ intermediatePool.AddCert(intermediates[i])
+ }
+
+ return rootPool, intermediatePool, leaf
+}
+
+func chainsToStrings(chains [][]*Certificate) []string {
+ chainStrings := []string{}
+ for _, chain := range chains {
+ names := []string{}
+ for _, c := range chain {
+ names = append(names, c.Subject.String())
+ }
+ chainStrings = append(chainStrings, strings.Join(names, " -> "))
+ }
+ sort.Strings(chainStrings)
+ return chainStrings
+}
+
+func TestPathBuilding(t *testing.T) {
+ tests := []struct {
+ name string
+ graph trustGraphDescription
+ expectedChains []string
+ expectedErr string
+ }{
+ {
+ // Build the following graph from RFC 4158, figure 7 (note that in this graph edges represent
+ // certificates where the parent is the issuer and the child is the subject.) For the certificate
+ // C->B, use an unsupported ExtKeyUsage (in this case ExtKeyUsageCodeSigning) which invalidates
+ // the path Trust Anchor -> C -> B -> EE. The remaining valid paths should be:
+ // * Trust Anchor -> A -> B -> EE
+ // * Trust Anchor -> C -> A -> B -> EE
+ //
+ // +---------+
+ // | Trust |
+ // | Anchor |
+ // +---------+
+ // | |
+ // v v
+ // +---+ +---+
+ // | A |<-->| C |
+ // +---+ +---+
+ // | |
+ // | +---+ |
+ // +->| B |<-+
+ // +---+
+ // |
+ // v
+ // +----+
+ // | EE |
+ // +----+
+ name: "bad EKU",
+ graph: trustGraphDescription{
+ Roots: []string{"root"},
+ Leaf: "leaf",
+ Graph: []trustGraphEdge{
+ {
+ Issuer: "root",
+ Subject: "inter a",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "root",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter c",
+ Subject: "inter a",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter c",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ MutateTemplate: func(t *Certificate) {
+ t.ExtKeyUsage = []ExtKeyUsage{ExtKeyUsageCodeSigning}
+ },
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter b",
+ Subject: "leaf",
+ Type: leafCertificate,
+ },
+ },
+ },
+ expectedChains: []string{
+ "CN=leaf -> CN=inter b -> CN=inter a -> CN=inter c -> CN=root",
+ "CN=leaf -> CN=inter b -> CN=inter a -> CN=root",
+ },
+ },
+ {
+ // Build the following graph from RFC 4158, figure 7 (note that in this graph edges represent
+ // certificates where the parent is the issuer and the child is the subject.) For the certificate
+ // C->B, use a unconstrained SAN which invalidates the path Trust Anchor -> C -> B -> EE. The
+ // remaining valid paths should be:
+ // * Trust Anchor -> A -> B -> EE
+ // * Trust Anchor -> C -> A -> B -> EE
+ //
+ // +---------+
+ // | Trust |
+ // | Anchor |
+ // +---------+
+ // | |
+ // v v
+ // +---+ +---+
+ // | A |<-->| C |
+ // +---+ +---+
+ // | |
+ // | +---+ |
+ // +->| B |<-+
+ // +---+
+ // |
+ // v
+ // +----+
+ // | EE |
+ // +----+
+ name: "bad EKU",
+ graph: trustGraphDescription{
+ Roots: []string{"root"},
+ Leaf: "leaf",
+ Graph: []trustGraphEdge{
+ {
+ Issuer: "root",
+ Subject: "inter a",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "root",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter c",
+ Subject: "inter a",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter c",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ MutateTemplate: func(t *Certificate) {
+ t.PermittedDNSDomains = []string{"good"}
+ t.DNSNames = []string{"bad"}
+ },
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter b",
+ Subject: "leaf",
+ Type: leafCertificate,
+ },
+ },
+ },
+ expectedChains: []string{
+ "CN=leaf -> CN=inter b -> CN=inter a -> CN=inter c -> CN=root",
+ "CN=leaf -> CN=inter b -> CN=inter a -> CN=root",
+ },
+ },
+ {
+ // Build the following graph, we should find both paths:
+ // * Trust Anchor -> A -> C -> EE
+ // * Trust Anchor -> A -> B -> C -> EE
+ //
+ // +---------+
+ // | Trust |
+ // | Anchor |
+ // +---------+
+ // |
+ // v
+ // +---+
+ // | A |
+ // +---+
+ // | |
+ // | +----+
+ // | v
+ // | +---+
+ // | | B |
+ // | +---+
+ // | |
+ // | +---v
+ // v v
+ // +---+
+ // | C |
+ // +---+
+ // |
+ // v
+ // +----+
+ // | EE |
+ // +----+
+ name: "all paths",
+ graph: trustGraphDescription{
+ Roots: []string{"root"},
+ Leaf: "leaf",
+ Graph: []trustGraphEdge{
+ {
+ Issuer: "root",
+ Subject: "inter a",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter b",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter c",
+ Subject: "leaf",
+ Type: leafCertificate,
+ },
+ },
+ },
+ expectedChains: []string{
+ "CN=leaf -> CN=inter c -> CN=inter a -> CN=root",
+ "CN=leaf -> CN=inter c -> CN=inter b -> CN=inter a -> CN=root",
+ },
+ },
+ {
+ // Build the following graph, which contains a cross-signature loop
+ // (A and C cross sign each other). Paths that include the A -> C -> A
+ // (and vice versa) loop should be ignored, resulting in the paths:
+ // * Trust Anchor -> A -> B -> EE
+ // * Trust Anchor -> C -> B -> EE
+ // * Trust Anchor -> A -> C -> B -> EE
+ // * Trust Anchor -> C -> A -> B -> EE
+ //
+ // +---------+
+ // | Trust |
+ // | Anchor |
+ // +---------+
+ // | |
+ // v v
+ // +---+ +---+
+ // | A |<-->| C |
+ // +---+ +---+
+ // | |
+ // | +---+ |
+ // +->| B |<-+
+ // +---+
+ // |
+ // v
+ // +----+
+ // | EE |
+ // +----+
+ name: "ignore cross-sig loops",
+ graph: trustGraphDescription{
+ Roots: []string{"root"},
+ Leaf: "leaf",
+ Graph: []trustGraphEdge{
+ {
+ Issuer: "root",
+ Subject: "inter a",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "root",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter c",
+ Subject: "inter a",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter c",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter b",
+ Subject: "leaf",
+ Type: leafCertificate,
+ },
+ },
+ },
+ expectedChains: []string{
+ "CN=leaf -> CN=inter b -> CN=inter a -> CN=inter c -> CN=root",
+ "CN=leaf -> CN=inter b -> CN=inter a -> CN=root",
+ "CN=leaf -> CN=inter b -> CN=inter c -> CN=inter a -> CN=root",
+ "CN=leaf -> CN=inter b -> CN=inter c -> CN=root",
+ },
+ },
+ {
+ // Build a simple two node graph, where the leaf is directly issued from
+ // the root and both certificates have matching subject and public key, but
+ // the leaf has SANs.
+ name: "leaf with same subject, key, as parent but with SAN",
+ graph: trustGraphDescription{
+ Roots: []string{"root"},
+ Leaf: "root",
+ Graph: []trustGraphEdge{
+ {
+ Issuer: "root",
+ Subject: "root",
+ Type: leafCertificate,
+ MutateTemplate: func(c *Certificate) {
+ c.DNSNames = []string{"localhost"}
+ },
+ },
+ },
+ },
+ expectedChains: []string{
+ "CN=root -> CN=root",
+ },
+ },
+ {
+ // Build a basic graph with two paths from leaf to root, but the path passing
+ // through C should be ignored, because it has invalid EKU nesting.
+ name: "ignore invalid EKU path",
+ graph: trustGraphDescription{
+ Roots: []string{"root"},
+ Leaf: "leaf",
+ Graph: []trustGraphEdge{
+ {
+ Issuer: "root",
+ Subject: "inter a",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "root",
+ Subject: "inter c",
+ Type: intermediateCertificate,
+ },
+ {
+ Issuer: "inter c",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ MutateTemplate: func(t *Certificate) {
+ t.ExtKeyUsage = []ExtKeyUsage{ExtKeyUsageCodeSigning}
+ },
+ },
+ {
+ Issuer: "inter a",
+ Subject: "inter b",
+ Type: intermediateCertificate,
+ MutateTemplate: func(t *Certificate) {
+ t.ExtKeyUsage = []ExtKeyUsage{ExtKeyUsageServerAuth}
+ },
+ },
+ {
+ Issuer: "inter b",
+ Subject: "leaf",
+ Type: leafCertificate,
+ MutateTemplate: func(t *Certificate) {
+ t.ExtKeyUsage = []ExtKeyUsage{ExtKeyUsageServerAuth}
+ },
+ },
+ },
+ },
+ expectedChains: []string{
+ "CN=leaf -> CN=inter b -> CN=inter a -> CN=root",
+ },
+ },
+ }
+
+ for _, tc := range tests {
+ t.Run(tc.name, func(t *testing.T) {
+ roots, intermediates, leaf := buildTrustGraph(t, tc.graph)
+ chains, err := leaf.Verify(VerifyOptions{
+ Roots: roots,
+ Intermediates: intermediates,
+ })
+ if err != nil && err.Error() != tc.expectedErr {
+ t.Fatalf("unexpected error: got %q, want %q", err, tc.expectedErr)
+ }
+ gotChains := chainsToStrings(chains)
+ if !reflect.DeepEqual(gotChains, tc.expectedChains) {
+ t.Errorf("unexpected chains returned:\ngot:\n\t%s\nwant:\n\t%s", strings.Join(gotChains, "\n\t"), strings.Join(tc.expectedChains, "\n\t"))
+ }
+ })
+ }
+}
+
+func TestEKUEnforcement(t *testing.T) {
+ type ekuDescs struct {
+ EKUs []ExtKeyUsage
+ Unknown []asn1.ObjectIdentifier
+ }
+ tests := []struct {
+ name string
+ root ekuDescs
+ inters []ekuDescs
+ leaf ekuDescs
+ verifyEKUs []ExtKeyUsage
+ err string
+ }{
+ {
+ name: "valid, full chain",
+ root: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ inters: []ekuDescs{ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}}},
+ leaf: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ },
+ {
+ name: "valid, only leaf has EKU",
+ root: ekuDescs{},
+ inters: []ekuDescs{ekuDescs{}},
+ leaf: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ },
+ {
+ name: "invalid, serverAuth not nested",
+ root: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageClientAuth}},
+ inters: []ekuDescs{ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth}}},
+ leaf: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth}},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ err: "x509: certificate specifies an incompatible key usage",
+ },
+ {
+ name: "valid, two EKUs, one path",
+ root: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ inters: []ekuDescs{ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth}}},
+ leaf: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth}},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth},
+ },
+ {
+ name: "invalid, ladder",
+ root: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ inters: []ekuDescs{
+ ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth}},
+ ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageClientAuth}},
+ ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth}},
+ ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ },
+ leaf: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth},
+ err: "x509: certificate specifies an incompatible key usage",
+ },
+ {
+ name: "valid, intermediate has no EKU",
+ root: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ inters: []ekuDescs{ekuDescs{}},
+ leaf: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ },
+ {
+ name: "invalid, intermediate has no EKU and no nested path",
+ root: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageClientAuth}},
+ inters: []ekuDescs{ekuDescs{}},
+ leaf: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth, ExtKeyUsageClientAuth},
+ err: "x509: certificate specifies an incompatible key usage",
+ },
+ {
+ name: "invalid, intermediate has unknown EKU",
+ root: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ inters: []ekuDescs{ekuDescs{Unknown: []asn1.ObjectIdentifier{{1, 2, 3}}}},
+ leaf: ekuDescs{EKUs: []ExtKeyUsage{ExtKeyUsageServerAuth}},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ err: "x509: certificate specifies an incompatible key usage",
+ },
+ }
+
+ k, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+ if err != nil {
+ t.Fatalf("failed to generate test key: %s", err)
+ }
+
+ for _, tc := range tests {
+ t.Run(tc.name, func(t *testing.T) {
+ rootPool := NewCertPool()
+ root := genCertEdge(t, "root", k, func(c *Certificate) {
+ c.ExtKeyUsage = tc.root.EKUs
+ c.UnknownExtKeyUsage = tc.root.Unknown
+ }, rootCertificate, nil, k)
+ rootPool.AddCert(root)
+
+ parent := root
+ interPool := NewCertPool()
+ for i, interEKUs := range tc.inters {
+ inter := genCertEdge(t, fmt.Sprintf("inter %d", i), k, func(c *Certificate) {
+ c.ExtKeyUsage = interEKUs.EKUs
+ c.UnknownExtKeyUsage = interEKUs.Unknown
+ }, intermediateCertificate, parent, k)
+ interPool.AddCert(inter)
+ parent = inter
+ }
+
+ leaf := genCertEdge(t, "leaf", k, func(c *Certificate) {
+ c.ExtKeyUsage = tc.leaf.EKUs
+ c.UnknownExtKeyUsage = tc.leaf.Unknown
+ }, intermediateCertificate, parent, k)
+
+ _, err := leaf.Verify(VerifyOptions{Roots: rootPool, Intermediates: interPool, KeyUsages: tc.verifyEKUs})
+ if err == nil && tc.err != "" {
+ t.Errorf("expected error")
+ } else if err != nil && err.Error() != tc.err {
+ t.Errorf("unexpected error: want %q, got %q", err.Error(), tc.err)
+ }
+ })
+ }
+}
+
+func TestVerifyEKURootAsLeaf(t *testing.T) {
+ k, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+ if err != nil {
+ t.Fatalf("failed to generate key: %s", err)
+ }
+
+ for _, tc := range []struct {
+ rootEKUs []ExtKeyUsage
+ verifyEKUs []ExtKeyUsage
+ succeed bool
+ }{
+ {
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ succeed: true,
+ },
+ {
+ rootEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ succeed: true,
+ },
+ {
+ rootEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ succeed: true,
+ },
+ {
+ rootEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageAny},
+ succeed: true,
+ },
+ {
+ rootEKUs: []ExtKeyUsage{ExtKeyUsageAny},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ succeed: true,
+ },
+ {
+ rootEKUs: []ExtKeyUsage{ExtKeyUsageClientAuth},
+ verifyEKUs: []ExtKeyUsage{ExtKeyUsageServerAuth},
+ succeed: false,
+ },
+ } {
+ t.Run(fmt.Sprintf("root EKUs %#v, verify EKUs %#v", tc.rootEKUs, tc.verifyEKUs), func(t *testing.T) {
+ tmpl := &Certificate{
+ SerialNumber: big.NewInt(1),
+ Subject: pkix.Name{CommonName: "root"},
+ NotBefore: time.Now().Add(-time.Hour),
+ NotAfter: time.Now().Add(time.Hour),
+ DNSNames: []string{"localhost"},
+ ExtKeyUsage: tc.rootEKUs,
+ }
+ rootDER, err := CreateCertificate(rand.Reader, tmpl, tmpl, k.Public(), k)
+ if err != nil {
+ t.Fatalf("failed to create certificate: %s", err)
+ }
+ root, err := ParseCertificate(rootDER)
+ if err != nil {
+ t.Fatalf("failed to parse certificate: %s", err)
+ }
+ roots := NewCertPool()
+ roots.AddCert(root)
+
+ _, err = root.Verify(VerifyOptions{Roots: roots, KeyUsages: tc.verifyEKUs})
+ if err == nil && !tc.succeed {
+ t.Error("verification succeed")
+ } else if err != nil && tc.succeed {
+ t.Errorf("verification failed: %q", err)
+ }
+ })
+ }
+
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-17 17:55:09 +0000