Source file src/crypto/tls/fips_test.go

     1  // Copyright 2017 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package tls
     6  
     7  import (
     8  	"crypto/ecdsa"
     9  	"crypto/elliptic"
    10  	"crypto/rand"
    11  	"crypto/rsa"
    12  	"crypto/x509"
    13  	"crypto/x509/pkix"
    14  	"encoding/pem"
    15  	"fmt"
    16  	"internal/obscuretestdata"
    17  	"internal/testenv"
    18  	"math/big"
    19  	"net"
    20  	"runtime"
    21  	"strings"
    22  	"testing"
    23  	"time"
    24  )
    25  
    26  func allCipherSuitesIncludingTLS13() []uint16 {
    27  	s := allCipherSuites()
    28  	for _, suite := range cipherSuitesTLS13 {
    29  		s = append(s, suite.id)
    30  	}
    31  	return s
    32  }
    33  
    34  func isTLS13CipherSuite(id uint16) bool {
    35  	for _, suite := range cipherSuitesTLS13 {
    36  		if id == suite.id {
    37  			return true
    38  		}
    39  	}
    40  	return false
    41  }
    42  
    43  func generateKeyShare(group CurveID) keyShare {
    44  	key, err := generateECDHEKey(rand.Reader, group)
    45  	if err != nil {
    46  		panic(err)
    47  	}
    48  	return keyShare{group: group, data: key.PublicKey().Bytes()}
    49  }
    50  
    51  func TestFIPSServerProtocolVersion(t *testing.T) {
    52  	test := func(t *testing.T, name string, v uint16, msg string) {
    53  		t.Run(name, func(t *testing.T) {
    54  			serverConfig := testConfig.Clone()
    55  			serverConfig.MinVersion = VersionSSL30
    56  			clientConfig := testConfig.Clone()
    57  			clientConfig.MinVersion = v
    58  			clientConfig.MaxVersion = v
    59  			_, _, err := testHandshake(t, clientConfig, serverConfig)
    60  			if msg == "" {
    61  				if err != nil {
    62  					t.Fatalf("got error: %v, expected success", err)
    63  				}
    64  			} else {
    65  				if err == nil {
    66  					t.Fatalf("got success, expected error")
    67  				}
    68  				if !strings.Contains(err.Error(), msg) {
    69  					t.Fatalf("got error %v, expected %q", err, msg)
    70  				}
    71  			}
    72  		})
    73  	}
    74  
    75  	runWithFIPSDisabled(t, func(t *testing.T) {
    76  		test(t, "VersionTLS10", VersionTLS10, "")
    77  		test(t, "VersionTLS11", VersionTLS11, "")
    78  		test(t, "VersionTLS12", VersionTLS12, "")
    79  		test(t, "VersionTLS13", VersionTLS13, "")
    80  	})
    81  
    82  	runWithFIPSEnabled(t, func(t *testing.T) {
    83  		test(t, "VersionTLS10", VersionTLS10, "supported versions")
    84  		test(t, "VersionTLS11", VersionTLS11, "supported versions")
    85  		test(t, "VersionTLS12", VersionTLS12, "")
    86  		test(t, "VersionTLS13", VersionTLS13, "")
    87  	})
    88  }
    89  
    90  func isFIPSVersion(v uint16) bool {
    91  	return v == VersionTLS12 || v == VersionTLS13
    92  }
    93  
    94  func isFIPSCipherSuite(id uint16) bool {
    95  	switch id {
    96  	case TLS_AES_128_GCM_SHA256,
    97  		TLS_AES_256_GCM_SHA384,
    98  		TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
    99  		TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
   100  		TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
   101  		TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384:
   102  		return true
   103  	}
   104  	return false
   105  }
   106  
   107  func isFIPSCurve(id CurveID) bool {
   108  	switch id {
   109  	case CurveP256, CurveP384, CurveP521:
   110  		return true
   111  	}
   112  	return false
   113  }
   114  
   115  func isECDSA(id uint16) bool {
   116  	for _, suite := range cipherSuites {
   117  		if suite.id == id {
   118  			return suite.flags&suiteECSign == suiteECSign
   119  		}
   120  	}
   121  	return false // TLS 1.3 cipher suites are not tied to the signature algorithm.
   122  }
   123  
   124  func isFIPSSignatureScheme(alg SignatureScheme) bool {
   125  	switch alg {
   126  	default:
   127  		return false
   128  	case PKCS1WithSHA256,
   129  		ECDSAWithP256AndSHA256,
   130  		PKCS1WithSHA384,
   131  		ECDSAWithP384AndSHA384,
   132  		PKCS1WithSHA512,
   133  		ECDSAWithP521AndSHA512,
   134  		PSSWithSHA256,
   135  		PSSWithSHA384,
   136  		PSSWithSHA512:
   137  		// ok
   138  	}
   139  	return true
   140  }
   141  
   142  func TestFIPSServerCipherSuites(t *testing.T) {
   143  	serverConfig := testConfig.Clone()
   144  	serverConfig.Certificates = make([]Certificate, 1)
   145  
   146  	for _, id := range allCipherSuitesIncludingTLS13() {
   147  		if isECDSA(id) {
   148  			serverConfig.Certificates[0].Certificate = [][]byte{testECDSACertificate}
   149  			serverConfig.Certificates[0].PrivateKey = testECDSAPrivateKey
   150  		} else {
   151  			serverConfig.Certificates[0].Certificate = [][]byte{testRSACertificate}
   152  			serverConfig.Certificates[0].PrivateKey = testRSAPrivateKey
   153  		}
   154  		serverConfig.BuildNameToCertificate()
   155  		t.Run(fmt.Sprintf("suite=%s", CipherSuiteName(id)), func(t *testing.T) {
   156  			clientHello := &clientHelloMsg{
   157  				vers:                         VersionTLS12,
   158  				random:                       make([]byte, 32),
   159  				cipherSuites:                 []uint16{id},
   160  				compressionMethods:           []uint8{compressionNone},
   161  				supportedCurves:              defaultCurvePreferences(),
   162  				keyShares:                    []keyShare{generateKeyShare(CurveP256)},
   163  				supportedPoints:              []uint8{pointFormatUncompressed},
   164  				supportedVersions:            []uint16{VersionTLS12},
   165  				supportedSignatureAlgorithms: defaultSupportedSignatureAlgorithmsFIPS,
   166  			}
   167  			if isTLS13CipherSuite(id) {
   168  				clientHello.supportedVersions = []uint16{VersionTLS13}
   169  			}
   170  
   171  			runWithFIPSDisabled(t, func(t *testing.T) {
   172  				testClientHello(t, serverConfig, clientHello)
   173  			})
   174  
   175  			runWithFIPSEnabled(t, func(t *testing.T) {
   176  				msg := ""
   177  				if !isFIPSCipherSuite(id) {
   178  					msg = "no cipher suite supported by both client and server"
   179  				}
   180  				testClientHelloFailure(t, serverConfig, clientHello, msg)
   181  			})
   182  		})
   183  	}
   184  }
   185  
   186  func TestFIPSServerCurves(t *testing.T) {
   187  	serverConfig := testConfig.Clone()
   188  	serverConfig.CurvePreferences = nil
   189  	serverConfig.BuildNameToCertificate()
   190  
   191  	for _, curveid := range defaultCurvePreferences() {
   192  		t.Run(fmt.Sprintf("curve=%d", curveid), func(t *testing.T) {
   193  			clientConfig := testConfig.Clone()
   194  			clientConfig.CurvePreferences = []CurveID{curveid}
   195  
   196  			runWithFIPSDisabled(t, func(t *testing.T) {
   197  				if _, _, err := testHandshake(t, clientConfig, serverConfig); err != nil {
   198  					t.Fatalf("got error: %v, expected success", err)
   199  				}
   200  			})
   201  
   202  			// With fipstls forced, bad curves should be rejected.
   203  			runWithFIPSEnabled(t, func(t *testing.T) {
   204  				_, _, err := testHandshake(t, clientConfig, serverConfig)
   205  				if err != nil && isFIPSCurve(curveid) {
   206  					t.Fatalf("got error: %v, expected success", err)
   207  				} else if err == nil && !isFIPSCurve(curveid) {
   208  					t.Fatalf("got success, expected error")
   209  				}
   210  			})
   211  		})
   212  	}
   213  }
   214  
   215  func fipsHandshake(t *testing.T, clientConfig, serverConfig *Config) (clientErr, serverErr error) {
   216  	c, s := localPipe(t)
   217  	client := Client(c, clientConfig)
   218  	server := Server(s, serverConfig)
   219  	done := make(chan error, 1)
   220  	go func() {
   221  		done <- client.Handshake()
   222  		c.Close()
   223  	}()
   224  	serverErr = server.Handshake()
   225  	s.Close()
   226  	clientErr = <-done
   227  	return
   228  }
   229  
   230  func TestFIPSServerSignatureAndHash(t *testing.T) {
   231  	defer func() {
   232  		testingOnlyForceClientHelloSignatureAlgorithms = nil
   233  	}()
   234  
   235  	for _, sigHash := range defaultSupportedSignatureAlgorithms {
   236  		t.Run(fmt.Sprintf("%v", sigHash), func(t *testing.T) {
   237  			serverConfig := testConfig.Clone()
   238  			serverConfig.Certificates = make([]Certificate, 1)
   239  
   240  			testingOnlyForceClientHelloSignatureAlgorithms = []SignatureScheme{sigHash}
   241  
   242  			sigType, _, _ := typeAndHashFromSignatureScheme(sigHash)
   243  			switch sigType {
   244  			case signaturePKCS1v15, signatureRSAPSS:
   245  				serverConfig.CipherSuites = []uint16{TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256}
   246  				serverConfig.Certificates[0].Certificate = [][]byte{testRSAPSS2048Certificate}
   247  				serverConfig.Certificates[0].PrivateKey = testRSAPSS2048PrivateKey
   248  			case signatureEd25519:
   249  				serverConfig.CipherSuites = []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256}
   250  				serverConfig.Certificates[0].Certificate = [][]byte{testEd25519Certificate}
   251  				serverConfig.Certificates[0].PrivateKey = testEd25519PrivateKey
   252  			case signatureECDSA:
   253  				serverConfig.CipherSuites = []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256}
   254  				serverConfig.Certificates[0].Certificate = [][]byte{testECDSACertificate}
   255  				serverConfig.Certificates[0].PrivateKey = testECDSAPrivateKey
   256  			}
   257  			serverConfig.BuildNameToCertificate()
   258  			// PKCS#1 v1.5 signature algorithms can't be used standalone in TLS
   259  			// 1.3, and the ECDSA ones bind to the curve used.
   260  			serverConfig.MaxVersion = VersionTLS12
   261  
   262  			runWithFIPSDisabled(t, func(t *testing.T) {
   263  				clientErr, serverErr := fipsHandshake(t, testConfig, serverConfig)
   264  				if clientErr != nil {
   265  					t.Fatalf("expected handshake with %#x to succeed; client error: %v; server error: %v", sigHash, clientErr, serverErr)
   266  				}
   267  			})
   268  
   269  			// With fipstls forced, bad curves should be rejected.
   270  			runWithFIPSEnabled(t, func(t *testing.T) {
   271  				clientErr, _ := fipsHandshake(t, testConfig, serverConfig)
   272  				if isFIPSSignatureScheme(sigHash) {
   273  					if clientErr != nil {
   274  						t.Fatalf("expected handshake with %#x to succeed; err=%v", sigHash, clientErr)
   275  					}
   276  				} else {
   277  					if clientErr == nil {
   278  						t.Fatalf("expected handshake with %#x to fail, but it succeeded", sigHash)
   279  					}
   280  				}
   281  			})
   282  		})
   283  	}
   284  }
   285  
   286  func TestFIPSClientHello(t *testing.T) {
   287  	runWithFIPSEnabled(t, testFIPSClientHello)
   288  }
   289  
   290  func testFIPSClientHello(t *testing.T) {
   291  	// Test that no matter what we put in the client config,
   292  	// the client does not offer non-FIPS configurations.
   293  
   294  	c, s := net.Pipe()
   295  	defer c.Close()
   296  	defer s.Close()
   297  
   298  	clientConfig := testConfig.Clone()
   299  	// All sorts of traps for the client to avoid.
   300  	clientConfig.MinVersion = VersionSSL30
   301  	clientConfig.MaxVersion = VersionTLS13
   302  	clientConfig.CipherSuites = allCipherSuites()
   303  	clientConfig.CurvePreferences = defaultCurvePreferences()
   304  
   305  	go Client(c, clientConfig).Handshake()
   306  	srv := Server(s, testConfig)
   307  	msg, err := srv.readHandshake(nil)
   308  	if err != nil {
   309  		t.Fatal(err)
   310  	}
   311  	hello, ok := msg.(*clientHelloMsg)
   312  	if !ok {
   313  		t.Fatalf("unexpected message type %T", msg)
   314  	}
   315  
   316  	if !isFIPSVersion(hello.vers) {
   317  		t.Errorf("client vers=%#x", hello.vers)
   318  	}
   319  	for _, v := range hello.supportedVersions {
   320  		if !isFIPSVersion(v) {
   321  			t.Errorf("client offered disallowed version %#x", v)
   322  		}
   323  	}
   324  	for _, id := range hello.cipherSuites {
   325  		if !isFIPSCipherSuite(id) {
   326  			t.Errorf("client offered disallowed suite %#x", id)
   327  		}
   328  	}
   329  	for _, id := range hello.supportedCurves {
   330  		if !isFIPSCurve(id) {
   331  			t.Errorf("client offered disallowed curve %d", id)
   332  		}
   333  	}
   334  	for _, sigHash := range hello.supportedSignatureAlgorithms {
   335  		if !isFIPSSignatureScheme(sigHash) {
   336  			t.Errorf("client offered disallowed signature-and-hash %v", sigHash)
   337  		}
   338  	}
   339  }
   340  
   341  func TestFIPSCertAlgs(t *testing.T) {
   342  	// arm and wasm time out generating keys. Nothing in this test is
   343  	// architecture-specific, so just don't bother on those.
   344  	if testenv.CPUIsSlow() {
   345  		t.Skipf("skipping on %s/%s because key generation takes too long", runtime.GOOS, runtime.GOARCH)
   346  	}
   347  
   348  	// Set up some roots, intermediate CAs, and leaf certs with various algorithms.
   349  	// X_Y is X signed by Y.
   350  	R1 := fipsCert(t, "R1", fipsRSAKey(t, 2048), nil, fipsCertCA|fipsCertFIPSOK)
   351  	R2 := fipsCert(t, "R2", fipsRSAKey(t, 1024), nil, fipsCertCA)
   352  	R3 := fipsCert(t, "R3", fipsRSAKey(t, 4096), nil, fipsCertCA|fipsCertFIPSOK)
   353  
   354  	M1_R1 := fipsCert(t, "M1_R1", fipsECDSAKey(t, elliptic.P256()), R1, fipsCertCA|fipsCertFIPSOK)
   355  	M2_R1 := fipsCert(t, "M2_R1", fipsECDSAKey(t, elliptic.P224()), R1, fipsCertCA)
   356  
   357  	I_R1 := fipsCert(t, "I_R1", fipsRSAKey(t, 3072), R1, fipsCertCA|fipsCertFIPSOK)
   358  	I_R2 := fipsCert(t, "I_R2", I_R1.key, R2, fipsCertCA|fipsCertFIPSOK)
   359  	I_M1 := fipsCert(t, "I_M1", I_R1.key, M1_R1, fipsCertCA|fipsCertFIPSOK)
   360  	I_M2 := fipsCert(t, "I_M2", I_R1.key, M2_R1, fipsCertCA|fipsCertFIPSOK)
   361  
   362  	I_R3 := fipsCert(t, "I_R3", fipsRSAKey(t, 3072), R3, fipsCertCA|fipsCertFIPSOK)
   363  	fipsCert(t, "I_R3", I_R3.key, R3, fipsCertCA|fipsCertFIPSOK)
   364  
   365  	L1_I := fipsCert(t, "L1_I", fipsECDSAKey(t, elliptic.P384()), I_R1, fipsCertLeaf|fipsCertFIPSOK)
   366  	L2_I := fipsCert(t, "L2_I", fipsRSAKey(t, 1024), I_R1, fipsCertLeaf)
   367  
   368  	// client verifying server cert
   369  	testServerCert := func(t *testing.T, desc string, pool *x509.CertPool, key interface{}, list [][]byte, ok bool) {
   370  		clientConfig := testConfig.Clone()
   371  		clientConfig.RootCAs = pool
   372  		clientConfig.InsecureSkipVerify = false
   373  		clientConfig.ServerName = "example.com"
   374  
   375  		serverConfig := testConfig.Clone()
   376  		serverConfig.Certificates = []Certificate{{Certificate: list, PrivateKey: key}}
   377  		serverConfig.BuildNameToCertificate()
   378  
   379  		clientErr, _ := fipsHandshake(t, clientConfig, serverConfig)
   380  
   381  		if (clientErr == nil) == ok {
   382  			if ok {
   383  				t.Logf("%s: accept", desc)
   384  			} else {
   385  				t.Logf("%s: reject", desc)
   386  			}
   387  		} else {
   388  			if ok {
   389  				t.Errorf("%s: BAD reject (%v)", desc, clientErr)
   390  			} else {
   391  				t.Errorf("%s: BAD accept", desc)
   392  			}
   393  		}
   394  	}
   395  
   396  	// server verifying client cert
   397  	testClientCert := func(t *testing.T, desc string, pool *x509.CertPool, key interface{}, list [][]byte, ok bool) {
   398  		clientConfig := testConfig.Clone()
   399  		clientConfig.ServerName = "example.com"
   400  		clientConfig.Certificates = []Certificate{{Certificate: list, PrivateKey: key}}
   401  
   402  		serverConfig := testConfig.Clone()
   403  		serverConfig.ClientCAs = pool
   404  		serverConfig.ClientAuth = RequireAndVerifyClientCert
   405  
   406  		_, serverErr := fipsHandshake(t, clientConfig, serverConfig)
   407  
   408  		if (serverErr == nil) == ok {
   409  			if ok {
   410  				t.Logf("%s: accept", desc)
   411  			} else {
   412  				t.Logf("%s: reject", desc)
   413  			}
   414  		} else {
   415  			if ok {
   416  				t.Errorf("%s: BAD reject (%v)", desc, serverErr)
   417  			} else {
   418  				t.Errorf("%s: BAD accept", desc)
   419  			}
   420  		}
   421  	}
   422  
   423  	// Run simple basic test with known answers before proceeding to
   424  	// exhaustive test with computed answers.
   425  	r1pool := x509.NewCertPool()
   426  	r1pool.AddCert(R1.cert)
   427  
   428  	runWithFIPSDisabled(t, func(t *testing.T) {
   429  		testServerCert(t, "basic", r1pool, L2_I.key, [][]byte{L2_I.der, I_R1.der}, true)
   430  		testClientCert(t, "basic (client cert)", r1pool, L2_I.key, [][]byte{L2_I.der, I_R1.der}, true)
   431  	})
   432  
   433  	runWithFIPSEnabled(t, func(t *testing.T) {
   434  		testServerCert(t, "basic (fips)", r1pool, L2_I.key, [][]byte{L2_I.der, I_R1.der}, false)
   435  		testClientCert(t, "basic (fips, client cert)", r1pool, L2_I.key, [][]byte{L2_I.der, I_R1.der}, false)
   436  	})
   437  
   438  	if t.Failed() {
   439  		t.Fatal("basic test failed, skipping exhaustive test")
   440  	}
   441  
   442  	if testing.Short() {
   443  		t.Logf("basic test passed; skipping exhaustive test in -short mode")
   444  		return
   445  	}
   446  
   447  	for l := 1; l <= 2; l++ {
   448  		leaf := L1_I
   449  		if l == 2 {
   450  			leaf = L2_I
   451  		}
   452  		for i := 0; i < 64; i++ {
   453  			reachable := map[string]bool{leaf.parentOrg: true}
   454  			reachableFIPS := map[string]bool{leaf.parentOrg: leaf.fipsOK}
   455  			list := [][]byte{leaf.der}
   456  			listName := leaf.name
   457  			addList := func(cond int, c *fipsCertificate) {
   458  				if cond != 0 {
   459  					list = append(list, c.der)
   460  					listName += "," + c.name
   461  					if reachable[c.org] {
   462  						reachable[c.parentOrg] = true
   463  					}
   464  					if reachableFIPS[c.org] && c.fipsOK {
   465  						reachableFIPS[c.parentOrg] = true
   466  					}
   467  				}
   468  			}
   469  			addList(i&1, I_R1)
   470  			addList(i&2, I_R2)
   471  			addList(i&4, I_M1)
   472  			addList(i&8, I_M2)
   473  			addList(i&16, M1_R1)
   474  			addList(i&32, M2_R1)
   475  
   476  			for r := 1; r <= 3; r++ {
   477  				pool := x509.NewCertPool()
   478  				rootName := ","
   479  				shouldVerify := false
   480  				shouldVerifyFIPS := false
   481  				addRoot := func(cond int, c *fipsCertificate) {
   482  					if cond != 0 {
   483  						rootName += "," + c.name
   484  						pool.AddCert(c.cert)
   485  						if reachable[c.org] {
   486  							shouldVerify = true
   487  						}
   488  						if reachableFIPS[c.org] && c.fipsOK {
   489  							shouldVerifyFIPS = true
   490  						}
   491  					}
   492  				}
   493  				addRoot(r&1, R1)
   494  				addRoot(r&2, R2)
   495  				rootName = rootName[1:] // strip leading comma
   496  
   497  				runWithFIPSDisabled(t, func(t *testing.T) {
   498  					testServerCert(t, listName+"->"+rootName[1:], pool, leaf.key, list, shouldVerify)
   499  					testClientCert(t, listName+"->"+rootName[1:]+"(client cert)", pool, leaf.key, list, shouldVerify)
   500  				})
   501  
   502  				runWithFIPSEnabled(t, func(t *testing.T) {
   503  					testServerCert(t, listName+"->"+rootName[1:]+" (fips)", pool, leaf.key, list, shouldVerifyFIPS)
   504  					testClientCert(t, listName+"->"+rootName[1:]+" (fips, client cert)", pool, leaf.key, list, shouldVerifyFIPS)
   505  				})
   506  			}
   507  		}
   508  	}
   509  }
   510  
   511  const (
   512  	fipsCertCA = iota
   513  	fipsCertLeaf
   514  	fipsCertFIPSOK = 0x80
   515  )
   516  
   517  func fipsRSAKey(t *testing.T, size int) *rsa.PrivateKey {
   518  	k, err := rsa.GenerateKey(rand.Reader, size)
   519  	if err != nil {
   520  		t.Fatal(err)
   521  	}
   522  	return k
   523  }
   524  
   525  func fipsECDSAKey(t *testing.T, curve elliptic.Curve) *ecdsa.PrivateKey {
   526  	k, err := ecdsa.GenerateKey(curve, rand.Reader)
   527  	if err != nil {
   528  		t.Fatal(err)
   529  	}
   530  	return k
   531  }
   532  
   533  type fipsCertificate struct {
   534  	name      string
   535  	org       string
   536  	parentOrg string
   537  	der       []byte
   538  	cert      *x509.Certificate
   539  	key       interface{}
   540  	fipsOK    bool
   541  }
   542  
   543  func fipsCert(t *testing.T, name string, key interface{}, parent *fipsCertificate, mode int) *fipsCertificate {
   544  	org := name
   545  	parentOrg := ""
   546  	if i := strings.Index(org, "_"); i >= 0 {
   547  		org = org[:i]
   548  		parentOrg = name[i+1:]
   549  	}
   550  	tmpl := &x509.Certificate{
   551  		SerialNumber: big.NewInt(1),
   552  		Subject: pkix.Name{
   553  			Organization: []string{org},
   554  		},
   555  		NotBefore: time.Unix(0, 0),
   556  		NotAfter:  time.Unix(0, 0),
   557  
   558  		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
   559  		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
   560  		BasicConstraintsValid: true,
   561  	}
   562  	if mode&^fipsCertFIPSOK == fipsCertLeaf {
   563  		tmpl.DNSNames = []string{"example.com"}
   564  	} else {
   565  		tmpl.IsCA = true
   566  		tmpl.KeyUsage |= x509.KeyUsageCertSign
   567  	}
   568  
   569  	var pcert *x509.Certificate
   570  	var pkey interface{}
   571  	if parent != nil {
   572  		pcert = parent.cert
   573  		pkey = parent.key
   574  	} else {
   575  		pcert = tmpl
   576  		pkey = key
   577  	}
   578  
   579  	var pub interface{}
   580  	var desc string
   581  	switch k := key.(type) {
   582  	case *rsa.PrivateKey:
   583  		pub = &k.PublicKey
   584  		desc = fmt.Sprintf("RSA-%d", k.N.BitLen())
   585  	case *ecdsa.PrivateKey:
   586  		pub = &k.PublicKey
   587  		desc = "ECDSA-" + k.Curve.Params().Name
   588  	default:
   589  		t.Fatalf("invalid key %T", key)
   590  	}
   591  
   592  	der, err := x509.CreateCertificate(rand.Reader, tmpl, pcert, pub, pkey)
   593  	if err != nil {
   594  		t.Fatal(err)
   595  	}
   596  	cert, err := x509.ParseCertificate(der)
   597  	if err != nil {
   598  		t.Fatal(err)
   599  	}
   600  
   601  	fipsOK := mode&fipsCertFIPSOK != 0
   602  	runWithFIPSEnabled(t, func(t *testing.T) {
   603  		if fipsAllowCert(cert) != fipsOK {
   604  			t.Errorf("fipsAllowCert(cert with %s key) = %v, want %v", desc, !fipsOK, fipsOK)
   605  		}
   606  	})
   607  
   608  	return &fipsCertificate{name, org, parentOrg, der, cert, key, fipsOK}
   609  }
   610  
   611  // A self-signed test certificate with an RSA key of size 2048, for testing
   612  // RSA-PSS with SHA512. SAN of example.golang.
   613  var (
   614  	testRSAPSS2048Certificate []byte
   615  	testRSAPSS2048PrivateKey  *rsa.PrivateKey
   616  )
   617  
   618  func init() {
   619  	block, _ := pem.Decode(obscuretestdata.Rot13([]byte(`
   620  -----ORTVA PREGVSVPNGR-----
   621  ZVVP/mPPNrrtNjVONtVENYUUK/xu4+4mZH9QnemORpDjQDLWXbMVuipANDRYODNj
   622  RwRDZN4TN1HRPuZUDJAgMFOQomNrSj0kZGNkZQRkAGN0ZQInSj0lZQRlZwxkAGN0
   623  ZQInZOVkRQNBOtAIONbGO0SwoJHtD28jttRvZN0TPFdTFVo3QDRONDHNN4VOQjNj
   624  ttRXNbVONDPs8sx0A6vrPOK4VBIVsXvgg4xTpBDYrvzPsfwddUplfZVITRgSFZ6R
   625  4Nl141s/7VdqJ0HgVdAo4CKuEBVQ7lQkE284kY6KoPhi/g5uC3HpruLp3uzYvlIq
   626  ZxMDvMJgsHHWs/1dBgZ+buAt59YEJc4q+6vK0yn1WY3RjPVpxxAwW9uDoS7Co2PF
   627  +RF9Lb55XNnc8XBoycpE8ZOFA38odajwsDqPKiBRBwnz2UHkXmRSK5ZN+sN0zr4P
   628  vbPpPEYJXy+TbA9S8sNOsbM+G+2rny4QYhB95eKE8FeBVIOu3KSBe/EIuwgKpAIS
   629  MXpiQg6q68I6wNXNLXz5ayw9TCcq4i+eNtZONNTwHQOBZN4TN1HqQjRO/jDRNjVS
   630  bQNGOtAIUFHRQQNXOtteOtRSODpQNGNZOtAIUEZONs8RNwNNZOxTN1HqRDDFZOPP
   631  QzI4LJ1joTHhM29fLJ5aZN0TPFdTFVo3QDROPjHNN4VONDPBbLfIpSPOuobdr3JU
   632  qP6I7KKKRPzawu01e8u80li0AE379aFQ3pj2Z+UXinKlfJdey5uwTIXj0igjQ81e
   633  I4WmQh7VsVbt5z8+DAP+7YdQMfm88iQXBefblFIBzHPtzPXSKrj+YN+rB/vDRWGe
   634  7rafqqBrKWRc27Rq5iJ+xzJJ3Dztyp2Tjl8jSeZQVdaeaBmON4bPaQRtgKWg0mbt
   635  aEjosRZNJv1nDEl5qG9XN3FC9zb5FrGSFmTTUvR4f4tUHr7wifNSS2dtgQ6+jU6f
   636  m9o6fukaP7t5VyOXuV7FIO/Hdg2lqW+xU1LowZpVd6ANZ5rAZXtMhWe3+mjfFtju
   637  TAnR
   638  -----RAQ PREGVSVPNGR-----`)))
   639  	testRSAPSS2048Certificate = block.Bytes
   640  
   641  	block, _ = pem.Decode(obscuretestdata.Rot13([]byte(`
   642  -----ORTVA EFN CEVINGR XRL-----
   643  ZVVRcNVONNXPNDRNa/U5AQrbattI+PQyFUlbeorWOaQxP3bcta7V6du3ZeQPSEuY
   644  EHwBuBNZgrAK/+lXaIgSYFXwJ+Q14HGvN+8t8HqiBZF+y2jee/7rLG91UUbJUA4M
   645  v4fyKGWTHVzIeK1SPK/9nweGCdVGLBsF0IdrUshby9WJgFF9kZNvUWWQLlsLHTkr
   646  m29txiuRiJXBrFtTdsPwz5nKRsQNHwq/T6c8V30UDy7muQb2cgu1ZFfkOI+GNCaj
   647  AWahNbdNaNxF1vcsudQsEsUjNK6Tsx/gazcrNl7wirn10sRdmvSDLq1kGd/0ILL7
   648  I3QIEJFaYj7rariSrbjPtTPchM5L/Ew6KrY/djVQNDNONbVONDPAcZMvsq/it42u
   649  UqPiYhMnLF0E7FhaSycbKRfygTqYSfac0VsbWM/htSDOFNVVsYjZhzH6bKN1m7Hi
   650  98nVLI61QrCeGPQIQSOfUoAzC8WNb8JgohfRojq5mlbO7YLT2+pyxWxyJR73XdHd
   651  ezV+HWrlFpy2Tva7MGkOKm1JCOx9IjpajxrnKctNFVOJ23suRPZ9taLRRjnOrm5G
   652  6Zr8q1gUgLDi7ifXr7eb9j9/UXeEKrwdLXX1YkxusSevlI+z8YMWMa2aKBn6T3tS
   653  Ao8Dx1Hx5CHORAOzlZSWuG4Z/hhFd4LgZeeB2tv8D+sCuhTmp5FfuLXEOc0J4C5e
   654  zgIPgRSENbTONZRAOVSYeI2+UfTw0kLSnfXbi/DCr6UFGE1Uu2VMBAc+bX4bfmJR
   655  wOG4IpaVGzcy6gP1Jl4TpekwAtXVSMNw+1k1YHHYqbeKxhT8le0gNuT9mAlsJfFl
   656  CeFbiP0HIome8Wkkyn+xDIkRDDdJDkCyRIhY8xKnVQN6Ylg1Uchn2YiCNbTONADM
   657  p6Yd2G7+OkYkAqv2z8xMmrw5xtmOc/KqIfoSJEyroVK2XeSUfeUmG9CHx3QR1iMX
   658  Z6cmGg94aDuJFxQtPnj1FbuRyW3USVSjphfS1FWNp3cDrcq8ht6VLqycQZYgOw/C
   659  /5C6OIHgtb05R4+V/G3vLngztyDkGgyM0ExFI2yyNbTONYBKxXSK7nuCis0JxfQu
   660  hGshSBGCbbjtDT0RctJ0jEqPkrt/WYvp3yFQ0tfggDI2JfErpelJpknryEt10EzB
   661  38OobtzunS4kitfFihwBsvMGR8bX1G43Z+6AXfVyZY3LVYocH/9nWkCJl0f2QdQe
   662  pDWuMeyx+cmwON7Oas/HEqjkNbTNXE/PAj14Q+zeY3LYoovPKvlqdkIjki5cqMqm
   663  8guv3GApfJP4vTHEqpIdosHvaICqWvKr/Xnp3JTPrEWnSItoXNBkYgv1EO5ZxVut
   664  Q8rlhcOdx4J1Y1txekdfqw4GSykxjZljwy2R2F4LlD8COg6I04QbIEMfVXmdm+CS
   665  HvbaCd0PtLOPLKidvbWuCrjxBd/L5jeQOrMJ1SDX5DQ9J5Z8/5mkq4eqiWgwuoWc
   666  bBegiZqey6hcl9Um4OWQ3SKjISvCSR7wdrAdv0S21ivYkOCZZQ3HBQS6YY5RlYvE
   667  9I4kIZF8XKkit7ekfhdmZCfpIvnJHY6JAIOufQ2+92qUkFKmm5RWXD==
   668  -----RAQ EFN CEVINGR XRL-----`)))
   669  	var err error
   670  	testRSAPSS2048PrivateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)
   671  	if err != nil {
   672  		panic(err)
   673  	}
   674  }
   675  

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