libgo/go/crypto/x509/x509_test.go

   1 // Copyright 2009 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 x509
   6
   7 import (
   8         "bytes"
   9         "crypto/dsa"
  10         "crypto/ecdsa"
  11         "crypto/elliptic"
  12         "crypto/rand"
  13         "crypto/rsa"
  14         _ "crypto/sha256"
  15         _ "crypto/sha512"
  16         "crypto/x509/pkix"
  17         "encoding/asn1"
  18         "encoding/base64"
  19         "encoding/hex"
  20         "encoding/pem"
  21         "fmt"
  22         "internal/testenv"
  23         "math/big"
  24         "net"
  25         "net/url"
  26         "os/exec"
  27         "reflect"
  28         "runtime"
  29         "strings"
  30         "testing"
  31         "time"
  32 )
  33
  34 func TestParsePKCS1PrivateKey(t *testing.T) {
  35         block, _ := pem.Decode([]byte(pemPrivateKey))
  36         priv, err := ParsePKCS1PrivateKey(block.Bytes)
  37         if err != nil {
  38                 t.Errorf("Failed to parse private key: %s", err)
  39                 return
  40         }
  41         if priv.PublicKey.N.Cmp(rsaPrivateKey.PublicKey.N) != 0 ||
  42                 priv.PublicKey.E != rsaPrivateKey.PublicKey.E ||
  43                 priv.D.Cmp(rsaPrivateKey.D) != 0 ||
  44                 priv.Primes[0].Cmp(rsaPrivateKey.Primes[0]) != 0 ||
  45                 priv.Primes[1].Cmp(rsaPrivateKey.Primes[1]) != 0 {
  46                 t.Errorf("got:%+v want:%+v", priv, rsaPrivateKey)
  47         }
  48
  49         // This private key includes an invalid prime that
  50         // rsa.PrivateKey.Validate should reject.
  51         data := []byte("0\x16\x02\x00\x02\x02\u007f\x00\x02\x0200\x02\x0200\x02\x02\x00\x01\x02\x02\u007f\x00")
  52         if _, err := ParsePKCS1PrivateKey(data); err == nil {
  53                 t.Errorf("parsing invalid private key did not result in an error")
  54         }
  55 }
  56
  57 func TestParsePKIXPublicKey(t *testing.T) {
  58         block, _ := pem.Decode([]byte(pemPublicKey))
  59         pub, err := ParsePKIXPublicKey(block.Bytes)
  60         if err != nil {
  61                 t.Errorf("Failed to parse RSA public key: %s", err)
  62                 return
  63         }
  64         rsaPub, ok := pub.(*rsa.PublicKey)
  65         if !ok {
  66                 t.Errorf("Value returned from ParsePKIXPublicKey was not an RSA public key")
  67                 return
  68         }
  69
  70         pubBytes2, err := MarshalPKIXPublicKey(rsaPub)
  71         if err != nil {
  72                 t.Errorf("Failed to marshal RSA public key for the second time: %s", err)
  73                 return
  74         }
  75         if !bytes.Equal(pubBytes2, block.Bytes) {
  76                 t.Errorf("Reserialization of public key didn't match. got %x, want %x", pubBytes2, block.Bytes)
  77         }
  78 }
  79
  80 var pemPublicKey = `-----BEGIN PUBLIC KEY-----
  81 MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3VoPN9PKUjKFLMwOge6+
  82 wnDi8sbETGIx2FKXGgqtAKpzmem53kRGEQg8WeqRmp12wgp74TGpkEXsGae7RS1k
  83 enJCnma4fii+noGH7R0qKgHvPrI2Bwa9hzsH8tHxpyM3qrXslOmD45EH9SxIDUBJ
  84 FehNdaPbLP1gFyahKMsdfxFJLUvbUycuZSJ2ZnIgeVxwm4qbSvZInL9Iu4FzuPtg
  85 fINKcbbovy1qq4KvPIrXzhbY3PWDc6btxCf3SE0JdE1MCPThntB62/bLMSQ7xdDR
  86 FF53oIpvxe/SCOymfWq/LW849Ytv3Xwod0+wzAP8STXG4HSELS4UedPYeHJJJYcZ
  87 +QIDAQAB
  88 -----END PUBLIC KEY-----
  89 `
  90
  91 var pemPrivateKey = `
  92 -----BEGIN RSA PRIVATE KEY-----
  93 MIICXAIBAAKBgQCxoeCUW5KJxNPxMp+KmCxKLc1Zv9Ny+4CFqcUXVUYH69L3mQ7v
  94 IWrJ9GBfcaA7BPQqUlWxWM+OCEQZH1EZNIuqRMNQVuIGCbz5UQ8w6tS0gcgdeGX7
  95 J7jgCQ4RK3F/PuCM38QBLaHx988qG8NMc6VKErBjctCXFHQt14lerd5KpQIDAQAB
  96 AoGAYrf6Hbk+mT5AI33k2Jt1kcweodBP7UkExkPxeuQzRVe0KVJw0EkcFhywKpr1
  97 V5eLMrILWcJnpyHE5slWwtFHBG6a5fLaNtsBBtcAIfqTQ0Vfj5c6SzVaJv0Z5rOd
  98 7gQF6isy3t3w9IF3We9wXQKzT6q5ypPGdm6fciKQ8RnzREkCQQDZwppKATqQ41/R
  99 vhSj90fFifrGE6aVKC1hgSpxGQa4oIdsYYHwMzyhBmWW9Xv/R+fPyr8ZwPxp2c12
 100 33QwOLPLAkEA0NNUb+z4ebVVHyvSwF5jhfJxigim+s49KuzJ1+A2RaSApGyBZiwS
 101 rWvWkB471POAKUYt5ykIWVZ83zcceQiNTwJBAMJUFQZX5GDqWFc/zwGoKkeR49Yi
 102 MTXIvf7Wmv6E++eFcnT461FlGAUHRV+bQQXGsItR/opIG7mGogIkVXa3E1MCQARX
 103 AAA7eoZ9AEHflUeuLn9QJI/r0hyQQLEtrpwv6rDT1GCWaLII5HJ6NUFVf4TTcqxo
 104 6vdM4QGKTJoO+SaCyP0CQFdpcxSAuzpFcKv0IlJ8XzS/cy+mweCMwyJ1PFEc4FX6
 105 wg/HcAJWY60xZTJDFN+Qfx8ZQvBEin6c2/h+zZi5IVY=
 106 -----END RSA PRIVATE KEY-----
 107 `
 108
 109 var testPrivateKey *rsa.PrivateKey
 110
 111 func init() {
 112         block, _ := pem.Decode([]byte(pemPrivateKey))
 113
 114         var err error
 115         if testPrivateKey, err = ParsePKCS1PrivateKey(block.Bytes); err != nil {
 116                 panic("Failed to parse private key: " + err.Error())
 117         }
 118 }
 119
 120 func bigFromString(s string) *big.Int {
 121         ret := new(big.Int)
 122         ret.SetString(s, 10)
 123         return ret
 124 }
 125
 126 func fromBase10(base10 string) *big.Int {
 127         i := new(big.Int)
 128         i.SetString(base10, 10)
 129         return i
 130 }
 131
 132 func bigFromHexString(s string) *big.Int {
 133         ret := new(big.Int)
 134         ret.SetString(s, 16)
 135         return ret
 136 }
 137
 138 var rsaPrivateKey = &rsa.PrivateKey{
 139         PublicKey: rsa.PublicKey{
 140                 N: bigFromString("124737666279038955318614287965056875799409043964547386061640914307192830334599556034328900586693254156136128122194531292927142396093148164407300419162827624945636708870992355233833321488652786796134504707628792159725681555822420087112284637501705261187690946267527866880072856272532711620639179596808018872997"),
 141                 E: 65537,
 142         },
 143         D: bigFromString("69322600686866301945688231018559005300304807960033948687567105312977055197015197977971637657636780793670599180105424702854759606794705928621125408040473426339714144598640466128488132656829419518221592374964225347786430566310906679585739468938549035854760501049443920822523780156843263434219450229353270690889"),
 144         Primes: []*big.Int{
 145                 bigFromString("11405025354575369741595561190164746858706645478381139288033759331174478411254205003127028642766986913445391069745480057674348716675323735886284176682955723"),
 146                 bigFromString("10937079261204603443118731009201819560867324167189758120988909645641782263430128449826989846631183550578761324239709121189827307416350485191350050332642639"),
 147         },
 148 }
 149
 150 func TestMarshalRSAPrivateKey(t *testing.T) {
 151         priv := &rsa.PrivateKey{
 152                 PublicKey: rsa.PublicKey{
 153                         N: fromBase10("16346378922382193400538269749936049106320265317511766357599732575277382844051791096569333808598921852351577762718529818072849191122419410612033592401403764925096136759934497687765453905884149505175426053037420486697072448609022753683683718057795566811401938833367954642951433473337066311978821180526439641496973296037000052546108507805269279414789035461158073156772151892452251106173507240488993608650881929629163465099476849643165682709047462010581308719577053905787496296934240246311806555924593059995202856826239801816771116902778517096212527979497399966526283516447337775509777558018145573127308919204297111496233"),
 154                         E: 3,
 155                 },
 156                 D: fromBase10("10897585948254795600358846499957366070880176878341177571733155050184921896034527397712889205732614568234385175145686545381899460748279607074689061600935843283397424506622998458510302603922766336783617368686090042765718290914099334449154829375179958369993407724946186243249568928237086215759259909861748642124071874879861299389874230489928271621259294894142840428407196932444474088857746123104978617098858619445675532587787023228852383149557470077802718705420275739737958953794088728369933811184572620857678792001136676902250566845618813972833750098806496641114644760255910789397593428910198080271317419213080834885003"),
 157                 Primes: []*big.Int{
 158                         fromBase10("1025363189502892836833747188838978207017355117492483312747347695538428729137306368764177201532277413433182799108299960196606011786562992097313508180436744488171474690412562218914213688661311117337381958560443"),
 159                         fromBase10("3467903426626310123395340254094941045497208049900750380025518552334536945536837294961497712862519984786362199788654739924501424784631315081391467293694361474867825728031147665777546570788493758372218019373"),
 160                         fromBase10("4597024781409332673052708605078359346966325141767460991205742124888960305710298765592730135879076084498363772408626791576005136245060321874472727132746643162385746062759369754202494417496879741537284589047"),
 161                 },
 162         }
 163
 164         derBytes := MarshalPKCS1PrivateKey(priv)
 165
 166         priv2, err := ParsePKCS1PrivateKey(derBytes)
 167         if err != nil {
 168                 t.Errorf("error parsing serialized key: %s", err)
 169                 return
 170         }
 171         if priv.PublicKey.N.Cmp(priv2.PublicKey.N) != 0 ||
 172                 priv.PublicKey.E != priv2.PublicKey.E ||
 173                 priv.D.Cmp(priv2.D) != 0 ||
 174                 len(priv2.Primes) != 3 ||
 175                 priv.Primes[0].Cmp(priv2.Primes[0]) != 0 ||
 176                 priv.Primes[1].Cmp(priv2.Primes[1]) != 0 ||
 177                 priv.Primes[2].Cmp(priv2.Primes[2]) != 0 {
 178                 t.Errorf("got:%+v want:%+v", priv, priv2)
 179         }
 180 }
 181
 182 func TestMarshalRSAPublicKey(t *testing.T) {
 183         pub := &rsa.PublicKey{
 184                 N: fromBase10("16346378922382193400538269749936049106320265317511766357599732575277382844051791096569333808598921852351577762718529818072849191122419410612033592401403764925096136759934497687765453905884149505175426053037420486697072448609022753683683718057795566811401938833367954642951433473337066311978821180526439641496973296037000052546108507805269279414789035461158073156772151892452251106173507240488993608650881929629163465099476849643165682709047462010581308719577053905787496296934240246311806555924593059995202856826239801816771116902778517096212527979497399966526283516447337775509777558018145573127308919204297111496233"),
 185                 E: 3,
 186         }
 187         derBytes := MarshalPKCS1PublicKey(pub)
 188         pub2, err := ParsePKCS1PublicKey(derBytes)
 189         if err != nil {
 190                 t.Errorf("ParsePKCS1PublicKey: %s", err)
 191         }
 192         if pub.N.Cmp(pub2.N) != 0 || pub.E != pub2.E {
 193                 t.Errorf("ParsePKCS1PublicKey = %+v, want %+v", pub, pub2)
 194         }
 195
 196         // It's never been documented that asn1.Marshal/Unmarshal on rsa.PublicKey works,
 197         // but it does, and we know of code that depends on it.
 198         // Lock that in, even though we'd prefer that people use MarshalPKCS1PublicKey and ParsePKCS1PublicKey.
 199         derBytes2, err := asn1.Marshal(*pub)
 200         if err != nil {
 201                 t.Errorf("Marshal(rsa.PublicKey): %v", err)
 202         } else if !bytes.Equal(derBytes, derBytes2) {
 203                 t.Errorf("Marshal(rsa.PublicKey) = %x, want %x", derBytes2, derBytes)
 204         }
 205         pub3 := new(rsa.PublicKey)
 206         rest, err := asn1.Unmarshal(derBytes, pub3)
 207         if err != nil {
 208                 t.Errorf("Unmarshal(rsa.PublicKey): %v", err)
 209         }
 210         if len(rest) != 0 || pub.N.Cmp(pub3.N) != 0 || pub.E != pub3.E {
 211                 t.Errorf("Unmarshal(rsa.PublicKey) = %+v, %q want %+v, %q", pub, rest, pub2, []byte(nil))
 212         }
 213
 214         publicKeys := []struct {
 215                 derBytes          []byte
 216                 expectedErrSubstr string
 217         }{
 218                 {
 219                         derBytes: []byte{
 220                                 0x30, 6, // SEQUENCE, 6 bytes
 221                                 0x02, 1, // INTEGER, 1 byte
 222                                 17,
 223                                 0x02, 1, // INTEGER, 1 byte
 224                                 3, // 3
 225                         },
 226                 }, {
 227                         derBytes: []byte{
 228                                 0x30, 6, // SEQUENCE
 229                                 0x02, 1, // INTEGER, 1 byte
 230                                 0xff,    // -1
 231                                 0x02, 1, // INTEGER, 1 byte
 232                                 3,
 233                         },
 234                         expectedErrSubstr: "zero or negative",
 235                 }, {
 236                         derBytes: []byte{
 237                                 0x30, 6, // SEQUENCE
 238                                 0x02, 1, // INTEGER, 1 byte
 239                                 17,
 240                                 0x02, 1, // INTEGER, 1 byte
 241                                 0xff, // -1
 242                         },
 243                         expectedErrSubstr: "zero or negative",
 244                 }, {
 245                         derBytes: []byte{
 246                                 0x30, 6, // SEQUENCE
 247                                 0x02, 1, // INTEGER, 1 byte
 248                                 17,
 249                                 0x02, 1, // INTEGER, 1 byte
 250                                 3,
 251                                 1,
 252                         },
 253                         expectedErrSubstr: "trailing data",
 254                 }, {
 255                         derBytes: []byte{
 256                                 0x30, 9, // SEQUENCE
 257                                 0x02, 1, // INTEGER, 1 byte
 258                                 17,
 259                                 0x02, 4, // INTEGER, 4 bytes
 260                                 0x7f, 0xff, 0xff, 0xff,
 261                         },
 262                 }, {
 263                         derBytes: []byte{
 264                                 0x30, 10, // SEQUENCE
 265                                 0x02, 1, // INTEGER, 1 byte
 266                                 17,
 267                                 0x02, 5, // INTEGER, 5 bytes
 268                                 0x00, 0x80, 0x00, 0x00, 0x00,
 269                         },
 270                         // On 64-bit systems, encoding/asn1 will accept the
 271                         // public exponent, but ParsePKCS1PublicKey will return
 272                         // an error. On 32-bit systems, encoding/asn1 will
 273                         // return the error. The common substring of both error
 274                         // is the word “large”.
 275                         expectedErrSubstr: "large",
 276                 },
 277         }
 278
 279         for i, test := range publicKeys {
 280                 shouldFail := len(test.expectedErrSubstr) > 0
 281                 pub, err := ParsePKCS1PublicKey(test.derBytes)
 282                 if shouldFail {
 283                         if err == nil {
 284                                 t.Errorf("#%d: unexpected success, got %#v", i, pub)
 285                         } else if !strings.Contains(err.Error(), test.expectedErrSubstr) {
 286                                 t.Errorf("#%d: expected error containing %q, got %s", i, test.expectedErrSubstr, err)
 287                         }
 288                 } else {
 289                         if err != nil {
 290                                 t.Errorf("#%d: unexpected failure: %s", i, err)
 291                                 continue
 292                         }
 293                         reserialized := MarshalPKCS1PublicKey(pub)
 294                         if !bytes.Equal(reserialized, test.derBytes) {
 295                                 t.Errorf("#%d: failed to reserialize: got %x, expected %x", i, reserialized, test.derBytes)
 296                         }
 297                 }
 298         }
 299 }
 300
 301 type matchHostnamesTest struct {
 302         pattern, host string
 303         ok            bool
 304 }
 305
 306 var matchHostnamesTests = []matchHostnamesTest{
 307         {"a.b.c", "a.b.c", true},
 308         {"a.b.c", "b.b.c", false},
 309         {"", "b.b.c", false},
 310         {"a.b.c", "", false},
 311         {"example.com", "example.com", true},
 312         {"example.com", "www.example.com", false},
 313         {"*.example.com", "example.com", false},
 314         {"*.example.com", "www.example.com", true},
 315         {"*.example.com", "www.example.com.", true},
 316         {"*.example.com", "xyz.www.example.com", false},
 317         {"*.*.example.com", "xyz.www.example.com", false},
 318         {"*.www.*.com", "xyz.www.example.com", false},
 319         {"*bar.example.com", "foobar.example.com", false},
 320         {"f*.example.com", "foobar.example.com", false},
 321         {"", ".", false},
 322         {".", "", false},
 323         {".", ".", false},
 324         {"example.com", "example.com.", true},
 325         {"example.com.", "example.com", true},
 326         {"example.com.", "example.com.", true},
 327         {"*.com.", "example.com.", true},
 328         {"*.com.", "example.com", true},
 329         {"*.com", "example.com", true},
 330         {"*.com", "example.com.", true},
 331 }
 332
 333 func TestMatchHostnames(t *testing.T) {
 334         for i, test := range matchHostnamesTests {
 335                 r := matchHostnames(test.pattern, test.host)
 336                 if r != test.ok {
 337                         t.Errorf("#%d mismatch got: %t want: %t when matching '%s' against '%s'", i, r, test.ok, test.host, test.pattern)
 338                 }
 339         }
 340 }
 341
 342 func TestMatchIP(t *testing.T) {
 343         // Check that pattern matching is working.
 344         c := &Certificate{
 345                 DNSNames: []string{"*.foo.bar.baz"},
 346                 Subject: pkix.Name{
 347                         CommonName: "*.foo.bar.baz",
 348                 },
 349         }
 350         err := c.VerifyHostname("quux.foo.bar.baz")
 351         if err != nil {
 352                 t.Fatalf("VerifyHostname(quux.foo.bar.baz): %v", err)
 353         }
 354
 355         // But check that if we change it to be matching against an IP address,
 356         // it is rejected.
 357         c = &Certificate{
 358                 DNSNames: []string{"*.2.3.4"},
 359                 Subject: pkix.Name{
 360                         CommonName: "*.2.3.4",
 361                 },
 362         }
 363         err = c.VerifyHostname("1.2.3.4")
 364         if err == nil {
 365                 t.Fatalf("VerifyHostname(1.2.3.4) should have failed, did not")
 366         }
 367
 368         c = &Certificate{
 369                 IPAddresses: []net.IP{net.ParseIP("127.0.0.1"), net.ParseIP("::1")},
 370         }
 371         err = c.VerifyHostname("127.0.0.1")
 372         if err != nil {
 373                 t.Fatalf("VerifyHostname(127.0.0.1): %v", err)
 374         }
 375         err = c.VerifyHostname("::1")
 376         if err != nil {
 377                 t.Fatalf("VerifyHostname(::1): %v", err)
 378         }
 379         err = c.VerifyHostname("[::1]")
 380         if err != nil {
 381                 t.Fatalf("VerifyHostname([::1]): %v", err)
 382         }
 383 }
 384
 385 func TestCertificateParse(t *testing.T) {
 386         s, _ := hex.DecodeString(certBytes)
 387         certs, err := ParseCertificates(s)
 388         if err != nil {
 389                 t.Error(err)
 390         }
 391         if len(certs) != 2 {
 392                 t.Errorf("Wrong number of certs: got %d want 2", len(certs))
 393                 return
 394         }
 395
 396         err = certs[0].CheckSignatureFrom(certs[1])
 397         if err != nil {
 398                 t.Error(err)
 399         }
 400
 401         if err := certs[0].VerifyHostname("mail.google.com"); err != nil {
 402                 t.Error(err)
 403         }
 404
 405         const expectedExtensions = 4
 406         if n := len(certs[0].Extensions); n != expectedExtensions {
 407                 t.Errorf("want %d extensions, got %d", expectedExtensions, n)
 408         }
 409 }
 410
 411 func TestMismatchedSignatureAlgorithm(t *testing.T) {
 412         der, _ := pem.Decode([]byte(rsaPSSSelfSignedPEM))
 413         if der == nil {
 414                 t.Fatal("Failed to find PEM block")
 415         }
 416
 417         cert, err := ParseCertificate(der.Bytes)
 418         if err != nil {
 419                 t.Fatal(err)
 420         }
 421
 422         if err = cert.CheckSignature(ECDSAWithSHA256, nil, nil); err == nil {
 423                 t.Fatal("CheckSignature unexpectedly return no error")
 424         }
 425
 426         const expectedSubstring = " but have public key of type "
 427         if !strings.Contains(err.Error(), expectedSubstring) {
 428                 t.Errorf("Expected error containing %q, but got %q", expectedSubstring, err)
 429         }
 430 }
 431
 432 var certBytes = "308203223082028ba00302010202106edf0d9499fd4533dd1297fc42a93be1300d06092a864886" +
 433         "f70d0101050500304c310b3009060355040613025a4131253023060355040a131c546861777465" +
 434         "20436f6e73756c74696e67202850747929204c74642e311630140603550403130d546861777465" +
 435         "20534743204341301e170d3039303332353136343932395a170d3130303332353136343932395a" +
 436         "3069310b3009060355040613025553311330110603550408130a43616c69666f726e6961311630" +
 437         "140603550407130d4d6f756e7461696e205669657731133011060355040a130a476f6f676c6520" +
 438         "496e63311830160603550403130f6d61696c2e676f6f676c652e636f6d30819f300d06092a8648" +
 439         "86f70d010101050003818d0030818902818100c5d6f892fccaf5614b064149e80a2c9581a218ef" +
 440         "41ec35bd7a58125ae76f9ea54ddc893abbeb029f6b73616bf0ffd868791fba7af9c4aebf3706ba" +
 441         "3eeaeed27435b4ddcfb157c05f351d66aa87fee0de072d66d773affbd36ab78bef090e0cc861a9" +
 442         "03ac90dd98b51c9c41566c017f0beec3bff391051ffba0f5cc6850ad2a590203010001a381e730" +
 443         "81e430280603551d250421301f06082b0601050507030106082b06010505070302060960864801" +
 444         "86f842040130360603551d1f042f302d302ba029a0278625687474703a2f2f63726c2e74686177" +
 445         "74652e636f6d2f54686177746553474343412e63726c307206082b060105050701010466306430" +
 446         "2206082b060105050730018616687474703a2f2f6f6373702e7468617774652e636f6d303e0608" +
 447         "2b060105050730028632687474703a2f2f7777772e7468617774652e636f6d2f7265706f736974" +
 448         "6f72792f5468617774655f5347435f43412e637274300c0603551d130101ff04023000300d0609" +
 449         "2a864886f70d01010505000381810062f1f3050ebc105e497c7aedf87e24d2f4a986bb3b837bd1" +
 450         "9b91ebcad98b065992f6bd2b49b7d6d3cb2e427a99d606c7b1d46352527fac39e6a8b6726de5bf" +
 451         "70212a52cba07634a5e332011bd1868e78eb5e3c93cf03072276786f207494feaa0ed9d53b2110" +
 452         "a76571f90209cdae884385c882587030ee15f33d761e2e45a6bc308203233082028ca003020102" +
 453         "020430000002300d06092a864886f70d0101050500305f310b3009060355040613025553311730" +
 454         "15060355040a130e566572695369676e2c20496e632e31373035060355040b132e436c61737320" +
 455         "33205075626c6963205072696d6172792043657274696669636174696f6e20417574686f726974" +
 456         "79301e170d3034303531333030303030305a170d3134303531323233353935395a304c310b3009" +
 457         "060355040613025a4131253023060355040a131c54686177746520436f6e73756c74696e672028" +
 458         "50747929204c74642e311630140603550403130d5468617774652053474320434130819f300d06" +
 459         "092a864886f70d010101050003818d0030818902818100d4d367d08d157faecd31fe7d1d91a13f" +
 460         "0b713cacccc864fb63fc324b0794bd6f80ba2fe10493c033fc093323e90b742b71c403c6d2cde2" +
 461         "2ff50963cdff48a500bfe0e7f388b72d32de9836e60aad007bc4644a3b847503f270927d0e62f5" +
 462         "21ab693684317590f8bfc76c881b06957cc9e5a8de75a12c7a68dfd5ca1c875860190203010001" +
 463         "a381fe3081fb30120603551d130101ff040830060101ff020100300b0603551d0f040403020106" +
 464         "301106096086480186f842010104040302010630280603551d110421301fa41d301b3119301706" +
 465         "035504031310507269766174654c6162656c332d313530310603551d1f042a30283026a024a022" +
 466         "8620687474703a2f2f63726c2e766572697369676e2e636f6d2f706361332e63726c303206082b" +
 467         "0601050507010104263024302206082b060105050730018616687474703a2f2f6f6373702e7468" +
 468         "617774652e636f6d30340603551d25042d302b06082b0601050507030106082b06010505070302" +
 469         "06096086480186f8420401060a6086480186f845010801300d06092a864886f70d010105050003" +
 470         "81810055ac63eadea1ddd2905f9f0bce76be13518f93d9052bc81b774bad6950a1eededcfddb07" +
 471         "e9e83994dcab72792f06bfab8170c4a8edea5334edef1e53d906c7562bd15cf4d18a8eb42bb137" +
 472         "9048084225c53e8acb7feb6f04d16dc574a2f7a27c7b603c77cd0ece48027f012fb69b37e02a2a" +
 473         "36dcd585d6ace53f546f961e05af"
 474
 475 func parseCIDR(s string) *net.IPNet {
 476         _, net, err := net.ParseCIDR(s)
 477         if err != nil {
 478                 panic(err)
 479         }
 480         return net
 481 }
 482
 483 func parseURI(s string) *url.URL {
 484         uri, err := url.Parse(s)
 485         if err != nil {
 486                 panic(err)
 487         }
 488         return uri
 489 }
 490
 491 func TestCreateSelfSignedCertificate(t *testing.T) {
 492         random := rand.Reader
 493
 494         ecdsaPriv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
 495         if err != nil {
 496                 t.Fatalf("Failed to generate ECDSA key: %s", err)
 497         }
 498
 499         tests := []struct {
 500                 name      string
 501                 pub, priv interface{}
 502                 checkSig  bool
 503                 sigAlgo   SignatureAlgorithm
 504         }{
 505                 {"RSA/RSA", &testPrivateKey.PublicKey, testPrivateKey, true, SHA1WithRSA},
 506                 {"RSA/ECDSA", &testPrivateKey.PublicKey, ecdsaPriv, false, ECDSAWithSHA384},
 507                 {"ECDSA/RSA", &ecdsaPriv.PublicKey, testPrivateKey, false, SHA256WithRSA},
 508                 {"ECDSA/ECDSA", &ecdsaPriv.PublicKey, ecdsaPriv, true, ECDSAWithSHA1},
 509                 {"RSAPSS/RSAPSS", &testPrivateKey.PublicKey, testPrivateKey, true, SHA256WithRSAPSS},
 510                 {"ECDSA/RSAPSS", &ecdsaPriv.PublicKey, testPrivateKey, false, SHA256WithRSAPSS},
 511                 {"RSAPSS/ECDSA", &testPrivateKey.PublicKey, ecdsaPriv, false, ECDSAWithSHA384},
 512         }
 513
 514         testExtKeyUsage := []ExtKeyUsage{ExtKeyUsageClientAuth, ExtKeyUsageServerAuth}
 515         testUnknownExtKeyUsage := []asn1.ObjectIdentifier{[]int{1, 2, 3}, []int{2, 59, 1}}
 516         extraExtensionData := []byte("extra extension")
 517
 518         for _, test := range tests {
 519                 commonName := "test.example.com"
 520                 template := Certificate{
 521                         // SerialNumber is negative to ensure that negative
 522                         // values are parsed. This is due to the prevalence of
 523                         // buggy code that produces certificates with negative
 524                         // serial numbers.
 525                         SerialNumber: big.NewInt(-1),
 526                         Subject: pkix.Name{
 527                                 CommonName:   commonName,
 528                                 Organization: []string{"Σ Acme Co"},
 529                                 Country:      []string{"US"},
 530                                 ExtraNames: []pkix.AttributeTypeAndValue{
 531                                         {
 532                                                 Type:  []int{2, 5, 4, 42},
 533                                                 Value: "Gopher",
 534                                         },
 535                                         // This should override the Country, above.
 536                                         {
 537                                                 Type:  []int{2, 5, 4, 6},
 538                                                 Value: "NL",
 539                                         },
 540                                 },
 541                         },
 542                         NotBefore: time.Unix(1000, 0),
 543                         NotAfter:  time.Unix(100000, 0),
 544
 545                         SignatureAlgorithm: test.sigAlgo,
 546
 547                         SubjectKeyId: []byte{1, 2, 3, 4},
 548                         KeyUsage:     KeyUsageCertSign,
 549
 550                         ExtKeyUsage:        testExtKeyUsage,
 551                         UnknownExtKeyUsage: testUnknownExtKeyUsage,
 552
 553                         BasicConstraintsValid: true,
 554                         IsCA:                  true,
 555
 556                         OCSPServer:            []string{"http://ocsp.example.com"},
 557                         IssuingCertificateURL: []string{"http://crt.example.com/ca1.crt"},
 558
 559                         DNSNames:       []string{"test.example.com"},
 560                         EmailAddresses: []string{"gopher@golang.org"},
 561                         IPAddresses:    []net.IP{net.IPv4(127, 0, 0, 1).To4(), net.ParseIP("2001:4860:0:2001::68")},
 562                         URIs:           []*url.URL{parseURI("https://foo.com/wibble#foo")},
 563
 564                         PolicyIdentifiers:       []asn1.ObjectIdentifier{[]int{1, 2, 3}},
 565                         PermittedDNSDomains:     []string{".example.com", "example.com"},
 566                         ExcludedDNSDomains:      []string{"bar.example.com"},
 567                         PermittedIPRanges:       []*net.IPNet{parseCIDR("192.168.1.1/16"), parseCIDR("1.2.3.4/8")},
 568                         ExcludedIPRanges:        []*net.IPNet{parseCIDR("2001:db8::/48")},
 569                         PermittedEmailAddresses: []string{"foo@example.com"},
 570                         ExcludedEmailAddresses:  []string{".example.com", "example.com"},
 571                         PermittedURIDomains:     []string{".bar.com", "bar.com"},
 572                         ExcludedURIDomains:      []string{".bar2.com", "bar2.com"},
 573
 574                         CRLDistributionPoints: []string{"http://crl1.example.com/ca1.crl", "http://crl2.example.com/ca1.crl"},
 575
 576                         ExtraExtensions: []pkix.Extension{
 577                                 {
 578                                         Id:    []int{1, 2, 3, 4},
 579                                         Value: extraExtensionData,
 580                                 },
 581                                 // This extension should override the SubjectKeyId, above.
 582                                 {
 583                                         Id:       oidExtensionSubjectKeyId,
 584                                         Critical: false,
 585                                         Value:    []byte{0x04, 0x04, 4, 3, 2, 1},
 586                                 },
 587                         },
 588                 }
 589
 590                 derBytes, err := CreateCertificate(random, &template, &template, test.pub, test.priv)
 591                 if err != nil {
 592                         t.Errorf("%s: failed to create certificate: %s", test.name, err)
 593                         continue
 594                 }
 595
 596                 cert, err := ParseCertificate(derBytes)
 597                 if err != nil {
 598                         t.Errorf("%s: failed to parse certificate: %s", test.name, err)
 599                         continue
 600                 }
 601
 602                 if len(cert.PolicyIdentifiers) != 1 || !cert.PolicyIdentifiers[0].Equal(template.PolicyIdentifiers[0]) {
 603                         t.Errorf("%s: failed to parse policy identifiers: got:%#v want:%#v", test.name, cert.PolicyIdentifiers, template.PolicyIdentifiers)
 604                 }
 605
 606                 if len(cert.PermittedDNSDomains) != 2 || cert.PermittedDNSDomains[0] != ".example.com" || cert.PermittedDNSDomains[1] != "example.com" {
 607                         t.Errorf("%s: failed to parse name constraints: %#v", test.name, cert.PermittedDNSDomains)
 608                 }
 609
 610                 if len(cert.ExcludedDNSDomains) != 1 || cert.ExcludedDNSDomains[0] != "bar.example.com" {
 611                         t.Errorf("%s: failed to parse name constraint exclusions: %#v", test.name, cert.ExcludedDNSDomains)
 612                 }
 613
 614                 if len(cert.PermittedIPRanges) != 2 || cert.PermittedIPRanges[0].String() != "192.168.0.0/16" || cert.PermittedIPRanges[1].String() != "1.0.0.0/8" {
 615                         t.Errorf("%s: failed to parse IP constraints: %#v", test.name, cert.PermittedIPRanges)
 616                 }
 617
 618                 if len(cert.ExcludedIPRanges) != 1 || cert.ExcludedIPRanges[0].String() != "2001:db8::/48" {
 619                         t.Errorf("%s: failed to parse IP constraint exclusions: %#v", test.name, cert.ExcludedIPRanges)
 620                 }
 621
 622                 if len(cert.PermittedEmailAddresses) != 1 || cert.PermittedEmailAddresses[0] != "foo@example.com" {
 623                         t.Errorf("%s: failed to parse permitted email addreses: %#v", test.name, cert.PermittedEmailAddresses)
 624                 }
 625
 626                 if len(cert.ExcludedEmailAddresses) != 2 || cert.ExcludedEmailAddresses[0] != ".example.com" || cert.ExcludedEmailAddresses[1] != "example.com" {
 627                         t.Errorf("%s: failed to parse excluded email addreses: %#v", test.name, cert.ExcludedEmailAddresses)
 628                 }
 629
 630                 if len(cert.PermittedURIDomains) != 2 || cert.PermittedURIDomains[0] != ".bar.com" || cert.PermittedURIDomains[1] != "bar.com" {
 631                         t.Errorf("%s: failed to parse permitted URIs: %#v", test.name, cert.PermittedURIDomains)
 632                 }
 633
 634                 if len(cert.ExcludedURIDomains) != 2 || cert.ExcludedURIDomains[0] != ".bar2.com" || cert.ExcludedURIDomains[1] != "bar2.com" {
 635                         t.Errorf("%s: failed to parse excluded URIs: %#v", test.name, cert.ExcludedURIDomains)
 636                 }
 637
 638                 if cert.Subject.CommonName != commonName {
 639                         t.Errorf("%s: subject wasn't correctly copied from the template. Got %s, want %s", test.name, cert.Subject.CommonName, commonName)
 640                 }
 641
 642                 if len(cert.Subject.Country) != 1 || cert.Subject.Country[0] != "NL" {
 643                         t.Errorf("%s: ExtraNames didn't override Country", test.name)
 644                 }
 645
 646                 for _, ext := range cert.Extensions {
 647                         if ext.Id.Equal(oidExtensionSubjectAltName) {
 648                                 if ext.Critical {
 649                                         t.Fatal("SAN extension is marked critical")
 650                                 }
 651                         }
 652                 }
 653
 654                 found := false
 655                 for _, atv := range cert.Subject.Names {
 656                         if atv.Type.Equal([]int{2, 5, 4, 42}) {
 657                                 found = true
 658                                 break
 659                         }
 660                 }
 661                 if !found {
 662                         t.Errorf("%s: Names didn't contain oid 2.5.4.42 from ExtraNames", test.name)
 663                 }
 664
 665                 if cert.Issuer.CommonName != commonName {
 666                         t.Errorf("%s: issuer wasn't correctly copied from the template. Got %s, want %s", test.name, cert.Issuer.CommonName, commonName)
 667                 }
 668
 669                 if cert.SignatureAlgorithm != test.sigAlgo {
 670                         t.Errorf("%s: SignatureAlgorithm wasn't copied from template. Got %v, want %v", test.name, cert.SignatureAlgorithm, test.sigAlgo)
 671                 }
 672
 673                 if !reflect.DeepEqual(cert.ExtKeyUsage, testExtKeyUsage) {
 674                         t.Errorf("%s: extkeyusage wasn't correctly copied from the template. Got %v, want %v", test.name, cert.ExtKeyUsage, testExtKeyUsage)
 675                 }
 676
 677                 if !reflect.DeepEqual(cert.UnknownExtKeyUsage, testUnknownExtKeyUsage) {
 678                         t.Errorf("%s: unknown extkeyusage wasn't correctly copied from the template. Got %v, want %v", test.name, cert.UnknownExtKeyUsage, testUnknownExtKeyUsage)
 679                 }
 680
 681                 if !reflect.DeepEqual(cert.OCSPServer, template.OCSPServer) {
 682                         t.Errorf("%s: OCSP servers differ from template. Got %v, want %v", test.name, cert.OCSPServer, template.OCSPServer)
 683                 }
 684
 685                 if !reflect.DeepEqual(cert.IssuingCertificateURL, template.IssuingCertificateURL) {
 686                         t.Errorf("%s: Issuing certificate URLs differ from template. Got %v, want %v", test.name, cert.IssuingCertificateURL, template.IssuingCertificateURL)
 687                 }
 688
 689                 if !reflect.DeepEqual(cert.DNSNames, template.DNSNames) {
 690                         t.Errorf("%s: SAN DNS names differ from template. Got %v, want %v", test.name, cert.DNSNames, template.DNSNames)
 691                 }
 692
 693                 if !reflect.DeepEqual(cert.EmailAddresses, template.EmailAddresses) {
 694                         t.Errorf("%s: SAN emails differ from template. Got %v, want %v", test.name, cert.EmailAddresses, template.EmailAddresses)
 695                 }
 696
 697                 if len(cert.URIs) != 1 || cert.URIs[0].String() != "https://foo.com/wibble#foo" {
 698                         t.Errorf("%s: URIs differ from template. Got %v, want %v", test.name, cert.URIs, template.URIs)
 699                 }
 700
 701                 if !reflect.DeepEqual(cert.IPAddresses, template.IPAddresses) {
 702                         t.Errorf("%s: SAN IPs differ from template. Got %v, want %v", test.name, cert.IPAddresses, template.IPAddresses)
 703                 }
 704
 705                 if !reflect.DeepEqual(cert.CRLDistributionPoints, template.CRLDistributionPoints) {
 706                         t.Errorf("%s: CRL distribution points differ from template. Got %v, want %v", test.name, cert.CRLDistributionPoints, template.CRLDistributionPoints)
 707                 }
 708
 709                 if !bytes.Equal(cert.SubjectKeyId, []byte{4, 3, 2, 1}) {
 710                         t.Errorf("%s: ExtraExtensions didn't override SubjectKeyId", test.name)
 711                 }
 712
 713                 if !bytes.Contains(derBytes, extraExtensionData) {
 714                         t.Errorf("%s: didn't find extra extension in DER output", test.name)
 715                 }
 716
 717                 if test.checkSig {
 718                         err = cert.CheckSignatureFrom(cert)
 719                         if err != nil {
 720                                 t.Errorf("%s: signature verification failed: %s", test.name, err)
 721                         }
 722                 }
 723         }
 724 }
 725
 726 // Self-signed certificate using ECDSA with SHA1 & secp256r1
 727 var ecdsaSHA1CertPem = `
 728 -----BEGIN CERTIFICATE-----
 729 MIICDjCCAbUCCQDF6SfN0nsnrjAJBgcqhkjOPQQBMIGPMQswCQYDVQQGEwJVUzET
 730 MBEGA1UECAwKQ2FsaWZvcm5pYTEWMBQGA1UEBwwNTW91bnRhaW4gVmlldzEVMBMG
 731 A1UECgwMR29vZ2xlLCBJbmMuMRcwFQYDVQQDDA53d3cuZ29vZ2xlLmNvbTEjMCEG
 732 CSqGSIb3DQEJARYUZ29sYW5nLWRldkBnbWFpbC5jb20wHhcNMTIwNTIwMjAyMDUw
 733 WhcNMjIwNTE4MjAyMDUwWjCBjzELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkNhbGlm
 734 b3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxFTATBgNVBAoMDEdvb2dsZSwg
 735 SW5jLjEXMBUGA1UEAwwOd3d3Lmdvb2dsZS5jb20xIzAhBgkqhkiG9w0BCQEWFGdv
 736 bGFuZy1kZXZAZ21haWwuY29tMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE/Wgn
 737 WQDo5+bz71T0327ERgd5SDDXFbXLpzIZDXTkjpe8QTEbsF+ezsQfrekrpDPC4Cd3
 738 P9LY0tG+aI8IyVKdUjAJBgcqhkjOPQQBA0gAMEUCIGlsqMcRqWVIWTD6wXwe6Jk2
 739 DKxL46r/FLgJYnzBEH99AiEA3fBouObsvV1R3oVkb4BQYnD4/4LeId6lAT43YvyV
 740 a/A=
 741 -----END CERTIFICATE-----
 742 `
 743
 744 // Self-signed certificate using ECDSA with SHA256 & secp256r1
 745 var ecdsaSHA256p256CertPem = `
 746 -----BEGIN CERTIFICATE-----
 747 MIICDzCCAbYCCQDlsuMWvgQzhTAKBggqhkjOPQQDAjCBjzELMAkGA1UEBhMCVVMx
 748 EzARBgNVBAgMCkNhbGlmb3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxFTAT
 749 BgNVBAoMDEdvb2dsZSwgSW5jLjEXMBUGA1UEAwwOd3d3Lmdvb2dsZS5jb20xIzAh
 750 BgkqhkiG9w0BCQEWFGdvbGFuZy1kZXZAZ21haWwuY29tMB4XDTEyMDUyMTAwMTkx
 751 NloXDTIyMDUxOTAwMTkxNlowgY8xCzAJBgNVBAYTAlVTMRMwEQYDVQQIDApDYWxp
 752 Zm9ybmlhMRYwFAYDVQQHDA1Nb3VudGFpbiBWaWV3MRUwEwYDVQQKDAxHb29nbGUs
 753 IEluYy4xFzAVBgNVBAMMDnd3dy5nb29nbGUuY29tMSMwIQYJKoZIhvcNAQkBFhRn
 754 b2xhbmctZGV2QGdtYWlsLmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABPMt
 755 2ErhxAty5EJRu9yM+MTy+hUXm3pdW1ensAv382KoGExSXAFWP7pjJnNtHO+XSwVm
 756 YNtqjcAGFKpweoN//kQwCgYIKoZIzj0EAwIDRwAwRAIgIYSaUA/IB81gjbIw/hUV
 757 70twxJr5EcgOo0hLp3Jm+EYCIFDO3NNcgmURbJ1kfoS3N/0O+irUtoPw38YoNkqJ
 758 h5wi
 759 -----END CERTIFICATE-----
 760 `
 761
 762 // Self-signed certificate using ECDSA with SHA256 & secp384r1
 763 var ecdsaSHA256p384CertPem = `
 764 -----BEGIN CERTIFICATE-----
 765 MIICSjCCAdECCQDje/no7mXkVzAKBggqhkjOPQQDAjCBjjELMAkGA1UEBhMCVVMx
 766 EzARBgNVBAgMCkNhbGlmb3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxFDAS
 767 BgNVBAoMC0dvb2dsZSwgSW5jMRcwFQYDVQQDDA53d3cuZ29vZ2xlLmNvbTEjMCEG
 768 CSqGSIb3DQEJARYUZ29sYW5nLWRldkBnbWFpbC5jb20wHhcNMTIwNTIxMDYxMDM0
 769 WhcNMjIwNTE5MDYxMDM0WjCBjjELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkNhbGlm
 770 b3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxFDASBgNVBAoMC0dvb2dsZSwg
 771 SW5jMRcwFQYDVQQDDA53d3cuZ29vZ2xlLmNvbTEjMCEGCSqGSIb3DQEJARYUZ29s
 772 YW5nLWRldkBnbWFpbC5jb20wdjAQBgcqhkjOPQIBBgUrgQQAIgNiAARRuzRNIKRK
 773 jIktEmXanNmrTR/q/FaHXLhWRZ6nHWe26Fw7Rsrbk+VjGy4vfWtNn7xSFKrOu5ze
 774 qxKnmE0h5E480MNgrUiRkaGO2GMJJVmxx20aqkXOk59U8yGA4CghE6MwCgYIKoZI
 775 zj0EAwIDZwAwZAIwBZEN8gvmRmfeP/9C1PRLzODIY4JqWub2PLRT4mv9GU+yw3Gr
 776 PU9A3CHMdEcdw/MEAjBBO1lId8KOCh9UZunsSMfqXiVurpzmhWd6VYZ/32G+M+Mh
 777 3yILeYQzllt/g0rKVRk=
 778 -----END CERTIFICATE-----
 779 `
 780
 781 // Self-signed certificate using ECDSA with SHA384 & secp521r1
 782 var ecdsaSHA384p521CertPem = `
 783 -----BEGIN CERTIFICATE-----
 784 MIICljCCAfcCCQDhp1AFD/ahKjAKBggqhkjOPQQDAzCBjjELMAkGA1UEBhMCVVMx
 785 EzARBgNVBAgMCkNhbGlmb3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxFDAS
 786 BgNVBAoMC0dvb2dsZSwgSW5jMRcwFQYDVQQDDA53d3cuZ29vZ2xlLmNvbTEjMCEG
 787 CSqGSIb3DQEJARYUZ29sYW5nLWRldkBnbWFpbC5jb20wHhcNMTIwNTIxMTUwNDI5
 788 WhcNMjIwNTE5MTUwNDI5WjCBjjELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkNhbGlm
 789 b3JuaWExFjAUBgNVBAcMDU1vdW50YWluIFZpZXcxFDASBgNVBAoMC0dvb2dsZSwg
 790 SW5jMRcwFQYDVQQDDA53d3cuZ29vZ2xlLmNvbTEjMCEGCSqGSIb3DQEJARYUZ29s
 791 YW5nLWRldkBnbWFpbC5jb20wgZswEAYHKoZIzj0CAQYFK4EEACMDgYYABACqx9Rv
 792 IssRs1LWYcNN+WffwlHw4Tv3y8/LIAA9MF1ZScIonU9nRMxt4a2uGJVCPDw6JHpz
 793 PaYc0E9puLoE9AfKpwFr59Jkot7dBg55SKPEFkddoip/rvmN7NPAWjMBirOwjOkm
 794 8FPthvPhGPqsu9AvgVuHu3PosWiHGNrhh379pva8MzAKBggqhkjOPQQDAwOBjAAw
 795 gYgCQgEHNmswkUdPpHqrVxp9PvLVl+xxPuHBkT+75z9JizyxtqykHQo9Uh6SWCYH
 796 BF9KLolo01wMt8DjoYP5Fb3j5MH7xwJCAbWZzTOp4l4DPkIvAh4LeC4VWbwPPyqh
 797 kBg71w/iEcSY3wUKgHGcJJrObZw7wys91I5kENljqw/Samdr3ka+jBJa
 798 -----END CERTIFICATE-----
 799 `
 800
 801 var ecdsaTests = []struct {
 802         sigAlgo SignatureAlgorithm
 803         pemCert string
 804 }{
 805         {ECDSAWithSHA1, ecdsaSHA1CertPem},
 806         {ECDSAWithSHA256, ecdsaSHA256p256CertPem},
 807         {ECDSAWithSHA256, ecdsaSHA256p384CertPem},
 808         {ECDSAWithSHA384, ecdsaSHA384p521CertPem},
 809 }
 810
 811 func TestECDSA(t *testing.T) {
 812         for i, test := range ecdsaTests {
 813                 pemBlock, _ := pem.Decode([]byte(test.pemCert))
 814                 cert, err := ParseCertificate(pemBlock.Bytes)
 815                 if err != nil {
 816                         t.Errorf("%d: failed to parse certificate: %s", i, err)
 817                         continue
 818                 }
 819                 if sa := cert.SignatureAlgorithm; sa != test.sigAlgo {
 820                         t.Errorf("%d: signature algorithm is %v, want %v", i, sa, test.sigAlgo)
 821                 }
 822                 if parsedKey, ok := cert.PublicKey.(*ecdsa.PublicKey); !ok {
 823                         t.Errorf("%d: wanted an ECDSA public key but found: %#v", i, parsedKey)
 824                 }
 825                 if pka := cert.PublicKeyAlgorithm; pka != ECDSA {
 826                         t.Errorf("%d: public key algorithm is %v, want ECDSA", i, pka)
 827                 }
 828                 if err = cert.CheckSignatureFrom(cert); err != nil {
 829                         t.Errorf("%d: certificate verification failed: %s", i, err)
 830                 }
 831         }
 832 }
 833
 834 // Self-signed certificate using DSA with SHA1
 835 var dsaCertPem = `-----BEGIN CERTIFICATE-----
 836 MIIEDTCCA82gAwIBAgIJALHPghaoxeDhMAkGByqGSM44BAMweTELMAkGA1UEBhMC
 837 VVMxCzAJBgNVBAgTAk5DMQ8wDQYDVQQHEwZOZXd0b24xFDASBgNVBAoTC0dvb2ds
 838 ZSwgSW5jMRIwEAYDVQQDEwlKb24gQWxsaWUxIjAgBgkqhkiG9w0BCQEWE2pvbmFs
 839 bGllQGdvb2dsZS5jb20wHhcNMTEwNTE0MDMwMTQ1WhcNMTEwNjEzMDMwMTQ1WjB5
 840 MQswCQYDVQQGEwJVUzELMAkGA1UECBMCTkMxDzANBgNVBAcTBk5ld3RvbjEUMBIG
 841 A1UEChMLR29vZ2xlLCBJbmMxEjAQBgNVBAMTCUpvbiBBbGxpZTEiMCAGCSqGSIb3
 842 DQEJARYTam9uYWxsaWVAZ29vZ2xlLmNvbTCCAbcwggEsBgcqhkjOOAQBMIIBHwKB
 843 gQC8hLUnQ7FpFYu4WXTj6DKvXvz8QrJkNJCVMTpKAT7uBpobk32S5RrPKXocd4gN
 844 8lyGB9ggS03EVlEwXvSmO0DH2MQtke2jl9j1HLydClMf4sbx5V6TV9IFw505U1iW
 845 jL7awRMgxge+FsudtJK254FjMFo03ZnOQ8ZJJ9E6AEDrlwIVAJpnBn9moyP11Ox5
 846 Asc/5dnjb6dPAoGBAJFHd4KVv1iTVCvEG6gGiYop5DJh28hUQcN9kul+2A0yPUSC
 847 X93oN00P8Vh3eYgSaCWZsha7zDG53MrVJ0Zf6v/X/CoZNhLldeNOepivTRAzn+Rz
 848 kKUYy5l1sxYLHQKF0UGNCXfFKZT0PCmgU+PWhYNBBMn6/cIh44vp85ideo5CA4GE
 849 AAKBgFmifCafzeRaohYKXJgMGSEaggCVCRq5xdyDCat+wbOkjC4mfG01/um3G8u5
 850 LxasjlWRKTR/tcAL7t0QuokVyQaYdVypZXNaMtx1db7YBuHjj3aP+8JOQRI9xz8c
 851 bp5NDJ5pISiFOv4p3GZfqZPcqckDt78AtkQrmnal2txhhjF6o4HeMIHbMB0GA1Ud
 852 DgQWBBQVyyr7hO11ZFFpWX50298Sa3V+rzCBqwYDVR0jBIGjMIGggBQVyyr7hO11
 853 ZFFpWX50298Sa3V+r6F9pHsweTELMAkGA1UEBhMCVVMxCzAJBgNVBAgTAk5DMQ8w
 854 DQYDVQQHEwZOZXd0b24xFDASBgNVBAoTC0dvb2dsZSwgSW5jMRIwEAYDVQQDEwlK
 855 b24gQWxsaWUxIjAgBgkqhkiG9w0BCQEWE2pvbmFsbGllQGdvb2dsZS5jb22CCQCx
 856 z4IWqMXg4TAMBgNVHRMEBTADAQH/MAkGByqGSM44BAMDLwAwLAIUPtn/5j8Q1jJI
 857 7ggOIsgrhgUdjGQCFCsmDq1H11q9+9Wp9IMeGrTSKHIM
 858 -----END CERTIFICATE-----
 859 `
 860
 861 func TestParseCertificateWithDsaPublicKey(t *testing.T) {
 862         expectedKey := &dsa.PublicKey{
 863                 Parameters: dsa.Parameters{
 864                         P: bigFromHexString("00BC84B52743B169158BB85974E3E832AF5EFCFC42B264349095313A4A013EEE069A1B937D92E51ACF297A1C77880DF25C8607D8204B4DC45651305EF4A63B40C7D8C42D91EDA397D8F51CBC9D0A531FE2C6F1E55E9357D205C39D395358968CBEDAC11320C607BE16CB9DB492B6E78163305A34DD99CE43C64927D13A0040EB97"),
 865                         Q: bigFromHexString("009A67067F66A323F5D4EC7902C73FE5D9E36FA74F"),
 866                         G: bigFromHexString("009147778295BF5893542BC41BA806898A29E43261DBC85441C37D92E97ED80D323D44825FDDE8374D0FF15877798812682599B216BBCC31B9DCCAD527465FEAFFD7FC2A193612E575E34E7A98AF4D10339FE47390A518CB9975B3160B1D0285D1418D0977C52994F43C29A053E3D685834104C9FAFDC221E38BE9F3989D7A8E42"),
 867                 },
 868                 Y: bigFromHexString("59A27C269FCDE45AA2160A5C980C19211A820095091AB9C5DC8309AB7EC1B3A48C2E267C6D35FEE9B71BCBB92F16AC8E559129347FB5C00BEEDD10BA8915C90698755CA965735A32DC7575BED806E1E38F768FFBC24E41123DC73F1C6E9E4D0C9E692128853AFE29DC665FA993DCA9C903B7BF00B6442B9A76A5DADC6186317A"),
 869         }
 870         pemBlock, _ := pem.Decode([]byte(dsaCertPem))
 871         cert, err := ParseCertificate(pemBlock.Bytes)
 872         if err != nil {
 873                 t.Fatalf("Failed to parse certificate: %s", err)
 874         }
 875         if cert.PublicKeyAlgorithm != DSA {
 876                 t.Errorf("Parsed key algorithm was not DSA")
 877         }
 878         parsedKey, ok := cert.PublicKey.(*dsa.PublicKey)
 879         if !ok {
 880                 t.Fatalf("Parsed key was not a DSA key: %s", err)
 881         }
 882         if expectedKey.Y.Cmp(parsedKey.Y) != 0 ||
 883                 expectedKey.P.Cmp(parsedKey.P) != 0 ||
 884                 expectedKey.Q.Cmp(parsedKey.Q) != 0 ||
 885                 expectedKey.G.Cmp(parsedKey.G) != 0 {
 886                 t.Fatal("Parsed key differs from expected key")
 887         }
 888 }
 889
 890 func TestParseCertificateWithDSASignatureAlgorithm(t *testing.T) {
 891         pemBlock, _ := pem.Decode([]byte(dsaCertPem))
 892         cert, err := ParseCertificate(pemBlock.Bytes)
 893         if err != nil {
 894                 t.Fatalf("Failed to parse certificate: %s", err)
 895         }
 896         if cert.SignatureAlgorithm != DSAWithSHA1 {
 897                 t.Errorf("Parsed signature algorithm was not DSAWithSHA1")
 898         }
 899 }
 900
 901 func TestVerifyCertificateWithDSASignature(t *testing.T) {
 902         pemBlock, _ := pem.Decode([]byte(dsaCertPem))
 903         cert, err := ParseCertificate(pemBlock.Bytes)
 904         if err != nil {
 905                 t.Fatalf("Failed to parse certificate: %s", err)
 906         }
 907         // test cert is self-signed
 908         if err = cert.CheckSignatureFrom(cert); err != nil {
 909                 t.Fatalf("DSA Certificate verification failed: %s", err)
 910         }
 911 }
 912
 913 var rsaPSSSelfSignedPEM = `-----BEGIN CERTIFICATE-----
 914 MIIGHjCCA9KgAwIBAgIBdjBBBgkqhkiG9w0BAQowNKAPMA0GCWCGSAFlAwQCAQUA
 915 oRwwGgYJKoZIhvcNAQEIMA0GCWCGSAFlAwQCAQUAogMCASAwbjELMAkGA1UEBhMC
 916 SlAxHDAaBgNVBAoME0phcGFuZXNlIEdvdmVybm1lbnQxKDAmBgNVBAsMH1RoZSBN
 917 aW5pc3RyeSBvZiBGb3JlaWduIEFmZmFpcnMxFzAVBgNVBAMMDmUtcGFzc3BvcnRD
 918 U0NBMB4XDTEzMDUxNDA1MDczMFoXDTI5MDUxNDA1MDczMFowbjELMAkGA1UEBhMC
 919 SlAxHDAaBgNVBAoME0phcGFuZXNlIEdvdmVybm1lbnQxKDAmBgNVBAsMH1RoZSBN
 920 aW5pc3RyeSBvZiBGb3JlaWduIEFmZmFpcnMxFzAVBgNVBAMMDmUtcGFzc3BvcnRD
 921 U0NBMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAx/E3WRVxcCDXhoST
 922 8nVSLjW6hwM4Ni99AegWzcGtfGFo0zjFA1Cl5URqxauvYu3gQgQHBGA1CovWeGrl
 923 yVSRzOL1imcYsSgLOcnhVYB3Xcrof4ebv9+W+TwNdc9YzAwcj8rNd5nP6PKXIQ+W
 924 PCkEOXdyb80YEnxuT+NPjkVfFSPBS7QYZpvT2fwy4fZ0eh48253+7VleSmTO0mqj
 925 7TlzaG56q150SLZbhpOd8jD8bM/wACnLCPR88wj4hCcDLEwoLyY85HJCTIQQMnoT
 926 UpqyzEeupPREIm6yi4d8C9YqIWFn2YTnRcWcmMaJLzq+kYwKoudfnoC6RW2vzZXn
 927 defQs68IZuK+uALu9G3JWGPgu0CQGj0JNDT8zkiDV++4eNrZczWKjr1YnAL+VbLK
 928 bApwL2u19l2WDpfUklimhWfraqHNIUKU6CjZOG31RzXcplIj0mtqs0E1r7r357Es
 929 yFoB28iNo4cz1lCulh0E4WJzWzLZcT4ZspHHRCFyvYnXoibXEV1nULq8ByKKG0FS
 930 7nn4SseoV+8PvjHLPhmHGMvi4mxkbcXdV3wthHT1/HXdqY84A4xHWt1+sB/TpTek
 931 tDhFlEfcUygvTu58UtOnysomOVVeERmi7WSujfzKsGJAJYeetiA5R+zX7BxeyFVE
 932 qW0zh1Tkwh0S8LRe5diJh4+6FG0CAwEAAaNfMF0wHQYDVR0OBBYEFD+oahaikBTV
 933 Urk81Uz7kRS2sx0aMA4GA1UdDwEB/wQEAwIBBjAYBgNVHSAEETAPMA0GCyqDCIaP
 934 fgYFAQEBMBIGA1UdEwEB/wQIMAYBAf8CAQAwQQYJKoZIhvcNAQEKMDSgDzANBglg
 935 hkgBZQMEAgEFAKEcMBoGCSqGSIb3DQEBCDANBglghkgBZQMEAgEFAKIDAgEgA4IC
 936 AQAaxWBQn5CZuNBfyzL57mn31ukHUFd61OMROSX3PT7oCv1Dy+C2AdRlxOcbN3/n
 937 li0yfXUUqiY3COlLAHKRlkr97mLtxEFoJ0R8nVN2IQdChNQM/XSCzSGyY8NVa1OR
 938 TTpEWLnexJ9kvIdbFXwUqdTnAkOI0m7Rg8j+E+lRRHg1xDAA1qKttrtUj3HRQWf3
 939 kNTu628SiMvap6aIdncburaK56MP7gkR1Wr/ichOfjIA3Jgw2PapI31i0GqeMd66
 940 U1+lC9FeyMAJpuSVp/SoiYzYo+79SFcVoM2yw3yAnIKg7q9GLYYqzncdykT6C06c
 941 15gWFI6igmReAsD9ITSvYh0jLrLHfEYcPTOD3ZXJ4EwwHtWSoO3gq1EAtOYKu/Lv
 942 C8zfBsZcFdsHvsSiYeBU8Oioe42mguky3Ax9O7D805Ek6R68ra07MW/G4YxvV7IN
 943 2BfSaYy8MX9IG0ZMIOcoc0FeF5xkFmJ7kdrlTaJzC0IE9PNxNaH5QnOAFB8vxHcO
 944 FioUxb6UKdHcPLR1VZtAdTdTMjSJxUqD/35Cdfqs7oDJXz8f6TXO2Tdy6G++YUs9
 945 qsGZWxzFvvkXUkQSl0dQQ5jO/FtUJcAVXVVp20LxPemfatAHpW31WdJYeWSQWky2
 946 +f9b5TXKXVyjlUL7uHxowWrT2AtTchDH22wTEtqLEF9Z3Q==
 947 -----END CERTIFICATE-----`
 948
 949 // openssl req -newkey rsa:2048 -keyout test.key -sha256 -sigopt \
 950 // rsa_padding_mode:pss -sigopt rsa_pss_saltlen:32 -sigopt rsa_mgf1_md:sha256 \
 951 // -x509 -days 3650 -nodes -subj '/C=US/ST=CA/L=SF/O=Test/CN=Test' -out \
 952 // test.pem
 953 var rsaPSSSelfSignedOpenSSL110PEM = `-----BEGIN CERTIFICATE-----
 954 MIIDwDCCAnigAwIBAgIJAM9LAMHTE5xpMD0GCSqGSIb3DQEBCjAwoA0wCwYJYIZI
 955 AWUDBAIBoRowGAYJKoZIhvcNAQEIMAsGCWCGSAFlAwQCAaIDAgEgMEUxCzAJBgNV
 956 BAYTAlVTMQswCQYDVQQIDAJDQTELMAkGA1UEBwwCU0YxDTALBgNVBAoMBFRlc3Qx
 957 DTALBgNVBAMMBFRlc3QwHhcNMTgwMjIyMjIxMzE4WhcNMjgwMjIwMjIxMzE4WjBF
 958 MQswCQYDVQQGEwJVUzELMAkGA1UECAwCQ0ExCzAJBgNVBAcMAlNGMQ0wCwYDVQQK
 959 DARUZXN0MQ0wCwYDVQQDDARUZXN0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB
 960 CgKCAQEA4Zrsydod+GoTAJLLutWNF87qhhVPBsK1zB1Gj+NAAe4+VbrZ1E41H1wp
 961 qITx7DA8DRtJEf+NqrTAnAdZWBG/tAOA5LfXVax0ZSQtLnYLSeylLoMtDyY3eFAj
 962 TmuTOoyVy6raktowCnHCh01NsstqqTfrx6SbmzOmDmKTkq/I+7K0MCVsn41xRDVM
 963 +ShD0WGFGioEGoiWnFSWupxJDA3Q6jIDEygVwNKHwnhv/2NgG2kqZzrZSQA67en0
 964 iKAXtoDNPpmyD5oS9YbEJ+2Nbm7oLeON30i6kZvXKIzJXx+UWViazHZqnsi5rQ8G
 965 RHF+iVFXsqd0MzDKmkKOT5FDhrsbKQIDAQABo1MwUTAdBgNVHQ4EFgQU9uFY/nlg
 966 gLH00NBnr/o7QvpN9ugwHwYDVR0jBBgwFoAU9uFY/nlggLH00NBnr/o7QvpN9ugw
 967 DwYDVR0TAQH/BAUwAwEB/zA9BgkqhkiG9w0BAQowMKANMAsGCWCGSAFlAwQCAaEa
 968 MBgGCSqGSIb3DQEBCDALBglghkgBZQMEAgGiAwIBIAOCAQEAhJzpwxBNGKvzKWDe
 969 WLqv6RMrl/q4GcH3b7M9wjxe0yOm4F+Tb2zJ7re4h+D39YkJf8cX1NV9UQVu6z4s
 970 Fvo2kmlR0qZOXAg5augmCQ1xS0WHFoF6B52anNzHkZQbAIYJ3kGoFsUHzs7Sz7F/
 971 656FsRpHA9UzJQ3avPPMrA4Y4aoJ7ANJ6XIwTrdWrhULOVuvYRLCl4CdTVztVFX6
 972 wxX8nS1ISYd8jXPUMgsBKVbWufvLoIymMJW8CZbpprVZel5zFn0bmPrON8IHS30w
 973 Gs+ITJjKEnZgXmAQ25SLKVzkZkBcGANs2GsdHNJ370Puisy0FIPD2NXR5uASAf7J
 974 +w9fjQ==
 975 -----END CERTIFICATE-----`
 976
 977 func TestRSAPSSSelfSigned(t *testing.T) {
 978         for i, pemBlock := range []string{rsaPSSSelfSignedPEM, rsaPSSSelfSignedOpenSSL110PEM} {
 979                 der, _ := pem.Decode([]byte(pemBlock))
 980                 if der == nil {
 981                         t.Errorf("#%d: failed to find PEM block", i)
 982                         continue
 983                 }
 984
 985                 cert, err := ParseCertificate(der.Bytes)
 986                 if err != nil {
 987                         t.Errorf("#%d: failed to parse: %s", i, err)
 988                         continue
 989                 }
 990
 991                 if err = cert.CheckSignatureFrom(cert); err != nil {
 992                         t.Errorf("#%d: signature check failed: %s", i, err)
 993                         continue
 994                 }
 995         }
 996 }
 997
 998 const pemCertificate = `-----BEGIN CERTIFICATE-----
 999 MIIDATCCAemgAwIBAgIRAKQkkrFx1T/dgB/Go/xBM5swDQYJKoZIhvcNAQELBQAw
1000 EjEQMA4GA1UEChMHQWNtZSBDbzAeFw0xNjA4MTcyMDM2MDdaFw0xNzA4MTcyMDM2
1001 MDdaMBIxEDAOBgNVBAoTB0FjbWUgQ28wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw
1002 ggEKAoIBAQDAoJtjG7M6InsWwIo+l3qq9u+g2rKFXNu9/mZ24XQ8XhV6PUR+5HQ4
1003 jUFWC58ExYhottqK5zQtKGkw5NuhjowFUgWB/VlNGAUBHtJcWR/062wYrHBYRxJH
1004 qVXOpYKbIWwFKoXu3hcpg/CkdOlDWGKoZKBCwQwUBhWE7MDhpVdQ+ZljUJWL+FlK
1005 yQK5iRsJd5TGJ6VUzLzdT4fmN2DzeK6GLeyMpVpU3sWV90JJbxWQ4YrzkKzYhMmB
1006 EcpXTG2wm+ujiHU/k2p8zlf8Sm7VBM/scmnMFt0ynNXop4FWvJzEm1G0xD2t+e2I
1007 5Utr04dOZPCgkm++QJgYhtZvgW7ZZiGTAgMBAAGjUjBQMA4GA1UdDwEB/wQEAwIF
1008 oDATBgNVHSUEDDAKBggrBgEFBQcDATAMBgNVHRMBAf8EAjAAMBsGA1UdEQQUMBKC
1009 EHRlc3QuZXhhbXBsZS5jb20wDQYJKoZIhvcNAQELBQADggEBADpqKQxrthH5InC7
1010 X96UP0OJCu/lLEMkrjoEWYIQaFl7uLPxKH5AmQPH4lYwF7u7gksR7owVG9QU9fs6
1011 1fK7II9CVgCd/4tZ0zm98FmU4D0lHGtPARrrzoZaqVZcAvRnFTlPX5pFkPhVjjai
1012 /mkxX9LpD8oK1445DFHxK5UjLMmPIIWd8EOi+v5a+hgGwnJpoW7hntSl8kHMtTmy
1013 fnnktsblSUV4lRCit0ymC7Ojhe+gzCCwkgs5kDzVVag+tnl/0e2DloIjASwOhpbH
1014 KVcg7fBd484ht/sS+l0dsB4KDOSpd8JzVDMF8OZqlaydizoJO0yWr9GbCN1+OKq5
1015 EhLrEqU=
1016 -----END CERTIFICATE-----`
1017
1018 func TestCRLCreation(t *testing.T) {
1019         block, _ := pem.Decode([]byte(pemPrivateKey))
1020         priv, _ := ParsePKCS1PrivateKey(block.Bytes)
1021         block, _ = pem.Decode([]byte(pemCertificate))
1022         cert, _ := ParseCertificate(block.Bytes)
1023
1024         loc := time.FixedZone("Oz/Atlantis", int((2 * time.Hour).Seconds()))
1025
1026         now := time.Unix(1000, 0).In(loc)
1027         nowUTC := now.UTC()
1028         expiry := time.Unix(10000, 0)
1029
1030         revokedCerts := []pkix.RevokedCertificate{
1031                 {
1032                         SerialNumber:   big.NewInt(1),
1033                         RevocationTime: nowUTC,
1034                 },
1035                 {
1036                         SerialNumber: big.NewInt(42),
1037                         // RevocationTime should be converted to UTC before marshaling.
1038                         RevocationTime: now,
1039                 },
1040         }
1041         expectedCerts := []pkix.RevokedCertificate{
1042                 {
1043                         SerialNumber:   big.NewInt(1),
1044                         RevocationTime: nowUTC,
1045                 },
1046                 {
1047                         SerialNumber:   big.NewInt(42),
1048                         RevocationTime: nowUTC,
1049                 },
1050         }
1051
1052         crlBytes, err := cert.CreateCRL(rand.Reader, priv, revokedCerts, now, expiry)
1053         if err != nil {
1054                 t.Errorf("error creating CRL: %s", err)
1055         }
1056
1057         parsedCRL, err := ParseDERCRL(crlBytes)
1058         if err != nil {
1059                 t.Errorf("error reparsing CRL: %s", err)
1060         }
1061         if !reflect.DeepEqual(parsedCRL.TBSCertList.RevokedCertificates, expectedCerts) {
1062                 t.Errorf("RevokedCertificates mismatch: got %v; want %v.",
1063                         parsedCRL.TBSCertList.RevokedCertificates, expectedCerts)
1064         }
1065 }
1066
1067 func fromBase64(in string) []byte {
1068         out := make([]byte, base64.StdEncoding.DecodedLen(len(in)))
1069         n, err := base64.StdEncoding.Decode(out, []byte(in))
1070         if err != nil {
1071                 panic("failed to base64 decode")
1072         }
1073         return out[:n]
1074 }
1075
1076 func TestParseDERCRL(t *testing.T) {
1077         derBytes := fromBase64(derCRLBase64)
1078         certList, err := ParseDERCRL(derBytes)
1079         if err != nil {
1080                 t.Errorf("error parsing: %s", err)
1081                 return
1082         }
1083         numCerts := len(certList.TBSCertList.RevokedCertificates)
1084         expected := 88
1085         if numCerts != expected {
1086                 t.Errorf("bad number of revoked certificates. got: %d want: %d", numCerts, expected)
1087         }
1088
1089         if certList.HasExpired(time.Unix(1302517272, 0)) {
1090                 t.Errorf("CRL has expired (but shouldn't have)")
1091         }
1092
1093         // Can't check the signature here without a package cycle.
1094 }
1095
1096 func TestCRLWithoutExpiry(t *testing.T) {
1097         derBytes := fromBase64("MIHYMIGZMAkGByqGSM44BAMwEjEQMA4GA1UEAxMHQ2FybERTUxcNOTkwODI3MDcwMDAwWjBpMBMCAgDIFw05OTA4MjIwNzAwMDBaMBMCAgDJFw05OTA4MjIwNzAwMDBaMBMCAgDTFw05OTA4MjIwNzAwMDBaMBMCAgDSFw05OTA4MjIwNzAwMDBaMBMCAgDUFw05OTA4MjQwNzAwMDBaMAkGByqGSM44BAMDLwAwLAIUfmVSdjP+NHMX0feW+aDU2G1cfT0CFAJ6W7fVWxjBz4fvftok8yqDnDWh")
1098         certList, err := ParseDERCRL(derBytes)
1099         if err != nil {
1100                 t.Fatal(err)
1101         }
1102         if !certList.TBSCertList.NextUpdate.IsZero() {
1103                 t.Errorf("NextUpdate is not the zero value")
1104         }
1105 }
1106
1107 func TestParsePEMCRL(t *testing.T) {
1108         pemBytes := fromBase64(pemCRLBase64)
1109         certList, err := ParseCRL(pemBytes)
1110         if err != nil {
1111                 t.Errorf("error parsing: %s", err)
1112                 return
1113         }
1114         numCerts := len(certList.TBSCertList.RevokedCertificates)
1115         expected := 2
1116         if numCerts != expected {
1117                 t.Errorf("bad number of revoked certificates. got: %d want: %d", numCerts, expected)
1118         }
1119
1120         if certList.HasExpired(time.Unix(1302517272, 0)) {
1121                 t.Errorf("CRL has expired (but shouldn't have)")
1122         }
1123
1124         // Can't check the signature here without a package cycle.
1125 }
1126
1127 func TestImports(t *testing.T) {
1128         testenv.MustHaveGoRun(t)
1129
1130         if err := exec.Command(testenv.GoToolPath(t), "run", "x509_test_import.go").Run(); err != nil {
1131                 t.Errorf("failed to run x509_test_import.go: %s", err)
1132         }
1133 }
1134
1135 const derCRLBase64 = "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"
1136
1137 const pemCRLBase64 = "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"
1138
1139 func TestCreateCertificateRequest(t *testing.T) {
1140         random := rand.Reader
1141
1142         ecdsa256Priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
1143         if err != nil {
1144                 t.Fatalf("Failed to generate ECDSA key: %s", err)
1145         }
1146
1147         ecdsa384Priv, err := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
1148         if err != nil {
1149                 t.Fatalf("Failed to generate ECDSA key: %s", err)
1150         }
1151
1152         ecdsa521Priv, err := ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
1153         if err != nil {
1154                 t.Fatalf("Failed to generate ECDSA key: %s", err)
1155         }
1156
1157         tests := []struct {
1158                 name    string
1159                 priv    interface{}
1160                 sigAlgo SignatureAlgorithm
1161         }{
1162                 {"RSA", testPrivateKey, SHA1WithRSA},
1163                 {"ECDSA-256", ecdsa256Priv, ECDSAWithSHA1},
1164                 {"ECDSA-384", ecdsa384Priv, ECDSAWithSHA1},
1165                 {"ECDSA-521", ecdsa521Priv, ECDSAWithSHA1},
1166         }
1167
1168         for _, test := range tests {
1169                 template := CertificateRequest{
1170                         Subject: pkix.Name{
1171                                 CommonName:   "test.example.com",
1172                                 Organization: []string{"Σ Acme Co"},
1173                         },
1174                         SignatureAlgorithm: test.sigAlgo,
1175                         DNSNames:           []string{"test.example.com"},
1176                         EmailAddresses:     []string{"gopher@golang.org"},
1177                         IPAddresses:        []net.IP{net.IPv4(127, 0, 0, 1).To4(), net.ParseIP("2001:4860:0:2001::68")},
1178                 }
1179
1180                 derBytes, err := CreateCertificateRequest(random, &template, test.priv)
1181                 if err != nil {
1182                         t.Errorf("%s: failed to create certificate request: %s", test.name, err)
1183                         continue
1184                 }
1185
1186                 out, err := ParseCertificateRequest(derBytes)
1187                 if err != nil {
1188                         t.Errorf("%s: failed to create certificate request: %s", test.name, err)
1189                         continue
1190                 }
1191
1192                 err = out.CheckSignature()
1193                 if err != nil {
1194                         t.Errorf("%s: failed to check certificate request signature: %s", test.name, err)
1195                         continue
1196                 }
1197
1198                 if out.Subject.CommonName != template.Subject.CommonName {
1199                         t.Errorf("%s: output subject common name and template subject common name don't match", test.name)
1200                 } else if len(out.Subject.Organization) != len(template.Subject.Organization) {
1201                         t.Errorf("%s: output subject organisation and template subject organisation don't match", test.name)
1202                 } else if len(out.DNSNames) != len(template.DNSNames) {
1203                         t.Errorf("%s: output DNS names and template DNS names don't match", test.name)
1204                 } else if len(out.EmailAddresses) != len(template.EmailAddresses) {
1205                         t.Errorf("%s: output email addresses and template email addresses don't match", test.name)
1206                 } else if len(out.IPAddresses) != len(template.IPAddresses) {
1207                         t.Errorf("%s: output IP addresses and template IP addresses names don't match", test.name)
1208                 }
1209         }
1210 }
1211
1212 func marshalAndParseCSR(t *testing.T, template *CertificateRequest) *CertificateRequest {
1213         derBytes, err := CreateCertificateRequest(rand.Reader, template, testPrivateKey)
1214         if err != nil {
1215                 t.Fatal(err)
1216         }
1217
1218         csr, err := ParseCertificateRequest(derBytes)
1219         if err != nil {
1220                 t.Fatal(err)
1221         }
1222
1223         return csr
1224 }
1225
1226 func TestCertificateRequestOverrides(t *testing.T) {
1227         sanContents, err := marshalSANs([]string{"foo.example.com"}, nil, nil, nil)
1228         if err != nil {
1229                 t.Fatal(err)
1230         }
1231
1232         template := CertificateRequest{
1233                 Subject: pkix.Name{
1234                         CommonName:   "test.example.com",
1235                         Organization: []string{"Σ Acme Co"},
1236                 },
1237                 DNSNames: []string{"test.example.com"},
1238
1239                 // An explicit extension should override the DNSNames from the
1240                 // template.
1241                 ExtraExtensions: []pkix.Extension{
1242                         {
1243                                 Id:       oidExtensionSubjectAltName,
1244                                 Value:    sanContents,
1245                                 Critical: true,
1246                         },
1247                 },
1248         }
1249
1250         csr := marshalAndParseCSR(t, &template)
1251
1252         if len(csr.DNSNames) != 1 || csr.DNSNames[0] != "foo.example.com" {
1253                 t.Errorf("Extension did not override template. Got %v\n", csr.DNSNames)
1254         }
1255
1256         if len(csr.Extensions) != 1 || !csr.Extensions[0].Id.Equal(oidExtensionSubjectAltName) || !csr.Extensions[0].Critical {
1257                 t.Errorf("SAN extension was not faithfully copied, got %#v", csr.Extensions)
1258         }
1259
1260         // If there is already an attribute with X.509 extensions then the
1261         // extra extensions should be added to it rather than creating a CSR
1262         // with two extension attributes.
1263
1264         template.Attributes = []pkix.AttributeTypeAndValueSET{
1265                 {
1266                         Type: oidExtensionRequest,
1267                         Value: [][]pkix.AttributeTypeAndValue{
1268                                 {
1269                                         {
1270                                                 Type:  oidExtensionAuthorityInfoAccess,
1271                                                 Value: []byte("foo"),
1272                                         },
1273                                 },
1274                         },
1275                 },
1276         }
1277
1278         csr = marshalAndParseCSR(t, &template)
1279         if l := len(csr.Attributes); l != 1 {
1280                 t.Errorf("incorrect number of attributes: %d\n", l)
1281         }
1282
1283         if !csr.Attributes[0].Type.Equal(oidExtensionRequest) ||
1284                 len(csr.Attributes[0].Value) != 1 ||
1285                 len(csr.Attributes[0].Value[0]) != 2 {
1286                 t.Errorf("bad attributes: %#v\n", csr.Attributes)
1287         }
1288
1289         sanContents2, err := marshalSANs([]string{"foo2.example.com"}, nil, nil, nil)
1290         if err != nil {
1291                 t.Fatal(err)
1292         }
1293
1294         // Extensions in Attributes should override those in ExtraExtensions.
1295         template.Attributes[0].Value[0] = append(template.Attributes[0].Value[0], pkix.AttributeTypeAndValue{
1296                 Type:  oidExtensionSubjectAltName,
1297                 Value: sanContents2,
1298         })
1299
1300         csr = marshalAndParseCSR(t, &template)
1301
1302         if len(csr.DNSNames) != 1 || csr.DNSNames[0] != "foo2.example.com" {
1303                 t.Errorf("Attributes did not override ExtraExtensions. Got %v\n", csr.DNSNames)
1304         }
1305 }
1306
1307 func TestParseCertificateRequest(t *testing.T) {
1308         for _, csrBase64 := range csrBase64Array {
1309                 csrBytes := fromBase64(csrBase64)
1310                 csr, err := ParseCertificateRequest(csrBytes)
1311                 if err != nil {
1312                         t.Fatalf("failed to parse CSR: %s", err)
1313                 }
1314
1315                 if len(csr.EmailAddresses) != 1 || csr.EmailAddresses[0] != "gopher@golang.org" {
1316                         t.Errorf("incorrect email addresses found: %v", csr.EmailAddresses)
1317                 }
1318
1319                 if len(csr.DNSNames) != 1 || csr.DNSNames[0] != "test.example.com" {
1320                         t.Errorf("incorrect DNS names found: %v", csr.DNSNames)
1321                 }
1322
1323                 if len(csr.Subject.Country) != 1 || csr.Subject.Country[0] != "AU" {
1324                         t.Errorf("incorrect Subject name: %v", csr.Subject)
1325                 }
1326
1327                 found := false
1328                 for _, e := range csr.Extensions {
1329                         if e.Id.Equal(oidExtensionBasicConstraints) {
1330                                 found = true
1331                                 break
1332                         }
1333                 }
1334                 if !found {
1335                         t.Errorf("basic constraints extension not found in CSR")
1336                 }
1337         }
1338 }
1339
1340 func TestCriticalFlagInCSRRequestedExtensions(t *testing.T) {
1341         // This CSR contains an extension request where the extensions have a
1342         // critical flag in them. In the past we failed to handle this.
1343         const csrBase64 = "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"
1344
1345         csrBytes := fromBase64(csrBase64)
1346         csr, err := ParseCertificateRequest(csrBytes)
1347         if err != nil {
1348                 t.Fatalf("failed to parse CSR: %s", err)
1349         }
1350
1351         expected := []struct {
1352                 Id    asn1.ObjectIdentifier
1353                 Value []byte
1354         }{
1355                 {oidExtensionBasicConstraints, fromBase64("MAYBAf8CAQA=")},
1356                 {oidExtensionKeyUsage, fromBase64("AwIChA==")},
1357         }
1358
1359         if n := len(csr.Extensions); n != len(expected) {
1360                 t.Fatalf("expected to find %d extensions but found %d", len(expected), n)
1361         }
1362
1363         for i, extension := range csr.Extensions {
1364                 if !extension.Id.Equal(expected[i].Id) {
1365                         t.Fatalf("extension #%d has unexpected type %v (expected %v)", i, extension.Id, expected[i].Id)
1366                 }
1367
1368                 if !bytes.Equal(extension.Value, expected[i].Value) {
1369                         t.Fatalf("extension #%d has unexpected contents %x (expected %x)", i, extension.Value, expected[i].Value)
1370                 }
1371         }
1372 }
1373
1374 // serialiseAndParse generates a self-signed certificate from template and
1375 // returns a parsed version of it.
1376 func serialiseAndParse(t *testing.T, template *Certificate) *Certificate {
1377         derBytes, err := CreateCertificate(rand.Reader, template, template, &testPrivateKey.PublicKey, testPrivateKey)
1378         if err != nil {
1379                 t.Fatalf("failed to create certificate: %s", err)
1380                 return nil
1381         }
1382
1383         cert, err := ParseCertificate(derBytes)
1384         if err != nil {
1385                 t.Fatalf("failed to parse certificate: %s", err)
1386                 return nil
1387         }
1388
1389         return cert
1390 }
1391
1392 func TestMaxPathLen(t *testing.T) {
1393         template := &Certificate{
1394                 SerialNumber: big.NewInt(1),
1395                 Subject: pkix.Name{
1396                         CommonName: "Σ Acme Co",
1397                 },
1398                 NotBefore: time.Unix(1000, 0),
1399                 NotAfter:  time.Unix(100000, 0),
1400
1401                 BasicConstraintsValid: true,
1402                 IsCA:                  true,
1403         }
1404
1405         cert1 := serialiseAndParse(t, template)
1406         if m := cert1.MaxPathLen; m != -1 {
1407                 t.Errorf("Omitting MaxPathLen didn't turn into -1, got %d", m)
1408         }
1409         if cert1.MaxPathLenZero {
1410                 t.Errorf("Omitting MaxPathLen resulted in MaxPathLenZero")
1411         }
1412
1413         template.MaxPathLen = 1
1414         cert2 := serialiseAndParse(t, template)
1415         if m := cert2.MaxPathLen; m != 1 {
1416                 t.Errorf("Setting MaxPathLen didn't work. Got %d but set 1", m)
1417         }
1418         if cert2.MaxPathLenZero {
1419                 t.Errorf("Setting MaxPathLen resulted in MaxPathLenZero")
1420         }
1421
1422         template.MaxPathLen = 0
1423         template.MaxPathLenZero = true
1424         cert3 := serialiseAndParse(t, template)
1425         if m := cert3.MaxPathLen; m != 0 {
1426                 t.Errorf("Setting MaxPathLenZero didn't work, got %d", m)
1427         }
1428         if !cert3.MaxPathLenZero {
1429                 t.Errorf("Setting MaxPathLen to zero didn't result in MaxPathLenZero")
1430         }
1431 }
1432
1433 func TestNoAuthorityKeyIdInSelfSignedCert(t *testing.T) {
1434         template := &Certificate{
1435                 SerialNumber: big.NewInt(1),
1436                 Subject: pkix.Name{
1437                         CommonName: "Σ Acme Co",
1438                 },
1439                 NotBefore: time.Unix(1000, 0),
1440                 NotAfter:  time.Unix(100000, 0),
1441
1442                 BasicConstraintsValid: true,
1443                 IsCA:                  true,
1444                 SubjectKeyId:          []byte{1, 2, 3, 4},
1445         }
1446
1447         if cert := serialiseAndParse(t, template); len(cert.AuthorityKeyId) != 0 {
1448                 t.Fatalf("self-signed certificate contained default authority key id")
1449         }
1450
1451         template.AuthorityKeyId = []byte{1, 2, 3, 4}
1452         if cert := serialiseAndParse(t, template); len(cert.AuthorityKeyId) == 0 {
1453                 t.Fatalf("self-signed certificate erased explicit authority key id")
1454         }
1455 }
1456
1457 func TestASN1BitLength(t *testing.T) {
1458         tests := []struct {
1459                 bytes  []byte
1460                 bitLen int
1461         }{
1462                 {nil, 0},
1463                 {[]byte{0x00}, 0},
1464                 {[]byte{0x00, 0x00}, 0},
1465                 {[]byte{0xf0}, 4},
1466                 {[]byte{0x88}, 5},
1467                 {[]byte{0xff}, 8},
1468                 {[]byte{0xff, 0x80}, 9},
1469                 {[]byte{0xff, 0x81}, 16},
1470         }
1471
1472         for i, test := range tests {
1473                 if got := asn1BitLength(test.bytes); got != test.bitLen {
1474                         t.Errorf("#%d: calculated bit-length of %d for %x, wanted %d", i, got, test.bytes, test.bitLen)
1475                 }
1476         }
1477 }
1478
1479 func TestVerifyEmptyCertificate(t *testing.T) {
1480         if _, err := new(Certificate).Verify(VerifyOptions{}); err != errNotParsed {
1481                 t.Errorf("Verifying empty certificate resulted in unexpected error: %q (wanted %q)", err, errNotParsed)
1482         }
1483 }
1484
1485 func TestInsecureAlgorithmErrorString(t *testing.T) {
1486         tests := []struct {
1487                 sa   SignatureAlgorithm
1488                 want string
1489         }{
1490                 {MD2WithRSA, "x509: cannot verify signature: insecure algorithm MD2-RSA"},
1491                 {-1, "x509: cannot verify signature: insecure algorithm -1"},
1492                 {0, "x509: cannot verify signature: insecure algorithm 0"},
1493                 {9999, "x509: cannot verify signature: insecure algorithm 9999"},
1494         }
1495         for i, tt := range tests {
1496                 if got := fmt.Sprint(InsecureAlgorithmError(tt.sa)); got != tt.want {
1497                         t.Errorf("%d. mismatch.\n got: %s\nwant: %s\n", i, got, tt.want)
1498                 }
1499         }
1500 }
1501
1502 // These CSR was generated with OpenSSL:
1503 //  openssl req -out CSR.csr -new -sha256 -nodes -keyout privateKey.key -config openssl.cnf
1504 //
1505 // With openssl.cnf containing the following sections:
1506 //   [ v3_req ]
1507 //   basicConstraints = CA:FALSE
1508 //   keyUsage = nonRepudiation, digitalSignature, keyEncipherment
1509 //   subjectAltName = email:gopher@golang.org,DNS:test.example.com
1510 //   [ req_attributes ]
1511 //   challengePassword = ignored challenge
1512 //   unstructuredName  = ignored unstructured name
1513 var csrBase64Array = [...]string{
1514         // Just [ v3_req ]
1515         "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",
1516         // Both [ v3_req ] and [ req_attributes ]
1517         "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",
1518 }
1519
1520 var md5cert = `
1521 -----BEGIN CERTIFICATE-----
1522 MIIB4TCCAUoCCQCfmw3vMgPS5TANBgkqhkiG9w0BAQQFADA1MQswCQYDVQQGEwJB
1523 VTETMBEGA1UECBMKU29tZS1TdGF0ZTERMA8GA1UEChMITUQ1IEluYy4wHhcNMTUx
1524 MjAzMTkyOTMyWhcNMjkwODEyMTkyOTMyWjA1MQswCQYDVQQGEwJBVTETMBEGA1UE
1525 CBMKU29tZS1TdGF0ZTERMA8GA1UEChMITUQ1IEluYy4wgZ8wDQYJKoZIhvcNAQEB
1526 BQADgY0AMIGJAoGBANrq2nhLQj5mlXbpVX3QUPhfEm/vdEqPkoWtR/jRZIWm4WGf
1527 Wpq/LKHJx2Pqwn+t117syN8l4U5unyAi1BJSXjBwPZNd7dXjcuJ+bRLV7FZ/iuvs
1528 cfYyQQFTxan4TaJMd0x1HoNDbNbjHa02IyjjYE/r3mb/PIg+J2t5AZEh80lPAgMB
1529 AAEwDQYJKoZIhvcNAQEEBQADgYEAjGzp3K3ey/YfKHohf33yHHWd695HQxDAP+wY
1530 cs9/TAyLR+gJzJP7d18EcDDLJWVi7bhfa4EAD86di05azOh9kWSn4b3o9QYRGCSw
1531 GNnI3Zk0cwNKA49hZntKKiy22DhRk7JAHF01d6Bu3KkHkmENrtJ+zj/+159WAnUa
1532 qViorq4=
1533 -----END CERTIFICATE-----
1534 `
1535
1536 func TestMD5(t *testing.T) {
1537         pemBlock, _ := pem.Decode([]byte(md5cert))
1538         cert, err := ParseCertificate(pemBlock.Bytes)
1539         if err != nil {
1540                 t.Fatalf("failed to parse certificate: %s", err)
1541         }
1542         if sa := cert.SignatureAlgorithm; sa != MD5WithRSA {
1543                 t.Errorf("signature algorithm is %v, want %v", sa, MD5WithRSA)
1544         }
1545         if err = cert.CheckSignatureFrom(cert); err == nil {
1546                 t.Fatalf("certificate verification succeeded incorrectly")
1547         }
1548         if _, ok := err.(InsecureAlgorithmError); !ok {
1549                 t.Fatalf("certificate verification returned %v (%T), wanted InsecureAlgorithmError", err, err)
1550         }
1551 }
1552
1553 // certMissingRSANULL contains an RSA public key where the AlgorithmIdentifer
1554 // parameters are omitted rather than being an ASN.1 NULL.
1555 const certMissingRSANULL = `
1556 -----BEGIN CERTIFICATE-----
1557 MIIB7TCCAVigAwIBAgIBADALBgkqhkiG9w0BAQUwJjEQMA4GA1UEChMHQWNtZSBD
1558 bzESMBAGA1UEAxMJMTI3LjAuMC4xMB4XDTExMTIwODA3NTUxMloXDTEyMTIwNzA4
1559 MDAxMlowJjEQMA4GA1UEChMHQWNtZSBDbzESMBAGA1UEAxMJMTI3LjAuMC4xMIGc
1560 MAsGCSqGSIb3DQEBAQOBjAAwgYgCgYBO0Hsx44Jk2VnAwoekXh6LczPHY1PfZpIG
1561 hPZk1Y/kNqcdK+izIDZFI7Xjla7t4PUgnI2V339aEu+H5Fto5OkOdOwEin/ekyfE
1562 ARl6vfLcPRSr0FTKIQzQTW6HLlzF0rtNS0/Otiz3fojsfNcCkXSmHgwa2uNKWi7e
1563 E5xMQIhZkwIDAQABozIwMDAOBgNVHQ8BAf8EBAMCAKAwDQYDVR0OBAYEBAECAwQw
1564 DwYDVR0jBAgwBoAEAQIDBDALBgkqhkiG9w0BAQUDgYEANh+zegx1yW43RmEr1b3A
1565 p0vMRpqBWHyFeSnIyMZn3TJWRSt1tukkqVCavh9a+hoV2cxVlXIWg7nCto/9iIw4
1566 hB2rXZIxE0/9gzvGnfERYraL7KtnvshksBFQRlgXa5kc0x38BvEO5ZaoDPl4ILdE
1567 GFGNEH5PlGffo05wc46QkYU=
1568 -----END CERTIFICATE-----`
1569
1570 func TestRSAMissingNULLParameters(t *testing.T) {
1571         block, _ := pem.Decode([]byte(certMissingRSANULL))
1572         if _, err := ParseCertificate(block.Bytes); err == nil {
1573                 t.Error("unexpected success when parsing certificate with missing RSA NULL parameter")
1574         } else if !strings.Contains(err.Error(), "missing NULL") {
1575                 t.Errorf("unrecognised error when parsing certificate with missing RSA NULL parameter: %s", err)
1576         }
1577 }
1578
1579 const certISOOID = `
1580 -----BEGIN CERTIFICATE-----
1581 MIIB5TCCAVKgAwIBAgIQtwyL3RPWV7dJQp34HwZG9DAJBgUrDgMCHQUAMBExDzAN
1582 BgNVBAMTBm15dGVzdDAeFw0xNjA4MDkyMjExMDVaFw0zOTEyMzEyMzU5NTlaMBEx
1583 DzANBgNVBAMTBm15dGVzdDCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEArzIH
1584 GsyDB3ohIGkkvijF2PTRUX1bvOtY1eUUpjwHyu0twpAKSuaQv2Ha+/63+aHe8O86
1585 BT+98wjXFX6RFSagtAujo80rIF2dSm33BGt18pDN8v6zp93dnAm0jRaSQrHJ75xw
1586 5O+S1oEYR1LtUoFJy6qB104j6aINBAgOiLIKiMkCAwEAAaNGMEQwQgYDVR0BBDsw
1587 OYAQVuYVQ/WDjdGSkZRlTtJDNKETMBExDzANBgNVBAMTBm15dGVzdIIQtwyL3RPW
1588 V7dJQp34HwZG9DAJBgUrDgMCHQUAA4GBABngrSkH7vG5lY4sa4AZF59lAAXqBVJE
1589 J4TBiKC62hCdZv18rBleP6ETfhbPg7pTs8p4ebQbpmtNxRS9Lw3MzQ8Ya5Ybwzj2
1590 NwBSyCtCQl7mrEg4nJqJl4A2EUhnET/oVxU0oTV/SZ3ziGXcY1oG1s6vidV7TZTu
1591 MCRtdSdaM7g3
1592 -----END CERTIFICATE-----`
1593
1594 func TestISOOIDInCertificate(t *testing.T) {
1595         block, _ := pem.Decode([]byte(certISOOID))
1596         if cert, err := ParseCertificate(block.Bytes); err != nil {
1597                 t.Errorf("certificate with ISO OID failed to parse: %s", err)
1598         } else if cert.SignatureAlgorithm == UnknownSignatureAlgorithm {
1599                 t.Errorf("ISO OID not recognised in certificate")
1600         }
1601 }
1602
1603 // certMultipleRDN contains a RelativeDistinguishedName with two elements (the
1604 // common name and serial number). This particular certificate was the first
1605 // such certificate in the “Pilot” Certificate Transparency log.
1606 const certMultipleRDN = `
1607 -----BEGIN CERTIFICATE-----
1608 MIIFRzCCBC+gAwIBAgIEOl59NTANBgkqhkiG9w0BAQUFADA9MQswCQYDVQQGEwJz
1609 aTEbMBkGA1UEChMSc3RhdGUtaW5zdGl0dXRpb25zMREwDwYDVQQLEwhzaWdvdi1j
1610 YTAeFw0xMjExMTYxMDUyNTdaFw0xNzExMTYxMjQ5MDVaMIGLMQswCQYDVQQGEwJz
1611 aTEbMBkGA1UEChMSc3RhdGUtaW5zdGl0dXRpb25zMRkwFwYDVQQLExB3ZWItY2Vy
1612 dGlmaWNhdGVzMRAwDgYDVQQLEwdTZXJ2ZXJzMTIwFAYDVQQFEw0xMjM2NDg0MDEw
1613 MDEwMBoGA1UEAxMTZXBvcnRhbC5tc3MuZWR1cy5zaTCCASIwDQYJKoZIhvcNAQEB
1614 BQADggEPADCCAQoCggEBAMrNkZH9MPuBTjMGNk3sJX8V+CkFx/4ru7RTlLS6dlYM
1615 098dtSfJ3s2w0p/1NB9UmR8j0yS0Kg6yoZ3ShsSO4DWBtcQD8820a6BYwqxxQTNf
1616 HSRZOc+N/4TQrvmK6t4k9Aw+YEYTMrWOU4UTeyhDeCcUsBdh7HjfWsVaqNky+2sv
1617 oic3zP5gF+2QfPkvOoHT3FLR8olNhViIE6Kk3eFIEs4dkq/ZzlYdLb8pHQoj/sGI
1618 zFmA5AFvm1HURqOmJriFjBwaCtn8AVEYOtQrnUCzJYu1ex8azyS2ZgYMX0u8A5Z/
1619 y2aMS/B2W+H79WcgLpK28vPwe7vam0oFrVytAd+u65ECAwEAAaOCAf4wggH6MA4G
1620 A1UdDwEB/wQEAwIFoDBABgNVHSAEOTA3MDUGCisGAQQBr1kBAwMwJzAlBggrBgEF
1621 BQcCARYZaHR0cDovL3d3dy5jYS5nb3Yuc2kvY3BzLzAfBgNVHREEGDAWgRRwb2Rw
1622 b3JhLm1pemtzQGdvdi5zaTCB8QYDVR0fBIHpMIHmMFWgU6BRpE8wTTELMAkGA1UE
1623 BhMCc2kxGzAZBgNVBAoTEnN0YXRlLWluc3RpdHV0aW9uczERMA8GA1UECxMIc2ln
1624 b3YtY2ExDjAMBgNVBAMTBUNSTDM5MIGMoIGJoIGGhldsZGFwOi8veDUwMC5nb3Yu
1625 c2kvb3U9c2lnb3YtY2Esbz1zdGF0ZS1pbnN0aXR1dGlvbnMsYz1zaT9jZXJ0aWZp
1626 Y2F0ZVJldm9jYXRpb25MaXN0P2Jhc2WGK2h0dHA6Ly93d3cuc2lnb3YtY2EuZ292
1627 LnNpL2NybC9zaWdvdi1jYS5jcmwwKwYDVR0QBCQwIoAPMjAxMjExMTYxMDUyNTda
1628 gQ8yMDE3MTExNjEyNDkwNVowHwYDVR0jBBgwFoAUHvjUU2uzgwbpBAZXAvmlv8ZY
1629 PHIwHQYDVR0OBBYEFGI1Duuu+wTGDZka/xHNbwcbM69ZMAkGA1UdEwQCMAAwGQYJ
1630 KoZIhvZ9B0EABAwwChsEVjcuMQMCA6gwDQYJKoZIhvcNAQEFBQADggEBAHny0K1y
1631 BQznrzDu3DDpBcGYguKU0dvU9rqsV1ua4nxkriSMWjgsX6XJFDdDW60I3P4VWab5
1632 ag5fZzbGqi8kva/CzGgZh+CES0aWCPy+4Gb8lwOTt+854/laaJvd6kgKTER7z7U9
1633 9C86Ch2y4sXNwwwPJ1A9dmrZJZOcJjS/WYZgwaafY2Hdxub5jqPE5nehwYUPVu9R
1634 uH6/skk4OEKcfOtN0hCnISOVuKYyS4ANARWRG5VGHIH06z3lGUVARFRJ61gtAprd
1635 La+fgSS+LVZ+kU2TkeoWAKvGq8MAgDq4D4Xqwekg7WKFeuyusi/NI5rm40XgjBMF
1636 DF72IUofoVt7wo0=
1637 -----END CERTIFICATE-----`
1638
1639 func TestMultipleRDN(t *testing.T) {
1640         block, _ := pem.Decode([]byte(certMultipleRDN))
1641         cert, err := ParseCertificate(block.Bytes)
1642         if err != nil {
1643                 t.Fatalf("certificate with two elements in an RDN failed to parse: %v", err)
1644         }
1645
1646         if want := "eportal.mss.edus.si"; cert.Subject.CommonName != want {
1647                 t.Errorf("got common name of %q, but want %q", cert.Subject.CommonName, want)
1648         }
1649
1650         if want := "1236484010010"; cert.Subject.SerialNumber != want {
1651                 t.Errorf("got serial number of %q, but want %q", cert.Subject.SerialNumber, want)
1652         }
1653 }
1654
1655 func TestSystemCertPool(t *testing.T) {
1656         if runtime.GOOS == "windows" {
1657                 t.Skip("not implemented on Windows; Issue 16736, 18609")
1658         }
1659         a, err := SystemCertPool()
1660         if err != nil {
1661                 t.Fatal(err)
1662         }
1663         b, err := SystemCertPool()
1664         if err != nil {
1665                 t.Fatal(err)
1666         }
1667         if !reflect.DeepEqual(a, b) {
1668                 t.Fatal("two calls to SystemCertPool had different results")
1669         }
1670         if ok := b.AppendCertsFromPEM([]byte(`
1671 -----BEGIN CERTIFICATE-----
1672 MIIDBjCCAe6gAwIBAgIRANXM5I3gjuqDfTp/PYrs+u8wDQYJKoZIhvcNAQELBQAw
1673 EjEQMA4GA1UEChMHQWNtZSBDbzAeFw0xODAzMjcxOTU2MjFaFw0xOTAzMjcxOTU2
1674 MjFaMBIxEDAOBgNVBAoTB0FjbWUgQ28wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw
1675 ggEKAoIBAQDK+9m3rjsO2Djes6bIYQZ3eV29JF09ZrjOrEHLtaKrD6/acsoSoTsf
1676 cQr+rzzztdB5ijWXCS64zo/0OiqBeZUNZ67jVdToa9qW5UYe2H0Y+ZNdfA5GYMFD
1677 yk/l3/uBu3suTZPfXiW2TjEi27Q8ruNUIZ54DpTcs6y2rBRFzadPWwn/VQMlvRXM
1678 jrzl8Y08dgnYmaAHprxVzwMXcQ/Brol+v9GvjaH1DooHqkn8O178wsPQNhdtvN01
1679 IXL46cYdcUwWrE/GX5u+9DaSi+0KWxAPQ+NVD5qUI0CKl4714yGGh7feXMjJdHgl
1680 VG4QJZlJvC4FsURgCHJT6uHGIelnSwhbAgMBAAGjVzBVMA4GA1UdDwEB/wQEAwIF
1681 oDATBgNVHSUEDDAKBggrBgEFBQcDATAMBgNVHRMBAf8EAjAAMCAGA1UdEQQZMBeC
1682 FVRlc3RTeXN0ZW1DZXJ0UG9vbC5nbzANBgkqhkiG9w0BAQsFAAOCAQEAwuSRx/VR
1683 BKh2ICxZjL6jBwk/7UlU1XKbhQD96RqkidDNGEc6eLZ90Z5XXTurEsXqdm5jQYPs
1684 1cdcSW+fOSMl7MfW9e5tM66FaIPZl9rKZ1r7GkOfgn93xdLAWe8XHd19xRfDreub
1685 YC8DVqgLASOEYFupVSl76ktPfxkU5KCvmUf3P2PrRybk1qLGFytGxfyice2gHSNI
1686 gify3K/+H/7wCkyFW4xYvzl7WW4mXxoqPRPjQt1J423DhnnQ4G1P8V/vhUpXNXOq
1687 N9IEPnWuihC09cyx/WMQIUlWnaQLHdfpPS04Iez3yy2PdfXJzwfPrja7rNE+skK6
1688 pa/O1nF0AfWOpw==
1689 -----END CERTIFICATE-----
1690         `)); !ok {
1691                 t.Fatal("AppendCertsFromPEM failed")
1692         }
1693         if reflect.DeepEqual(a, b) {
1694                 t.Fatal("changing one pool modified the other")
1695         }
1696 }
1697
1698 const emptyNameConstraintsPEM = `
1699 -----BEGIN CERTIFICATE-----
1700 MIIC1jCCAb6gAwIBAgICEjQwDQYJKoZIhvcNAQELBQAwKDEmMCQGA1UEAxMdRW1w
1701 dHkgbmFtZSBjb25zdHJhaW50cyBpc3N1ZXIwHhcNMTMwMjAxMDAwMDAwWhcNMjAw
1702 NTMwMTA0ODM4WjAhMR8wHQYDVQQDExZFbXB0eSBuYW1lIGNvbnN0cmFpbnRzMIIB
1703 IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwriElUIt3LCqmJObs+yDoWPD
1704 F5IqgWk6moIobYjPfextZiYU6I3EfvAwoNxPDkN2WowcocUZMJbEeEq5ebBksFnx
1705 f12gBxlIViIYwZAzu7aFvhDMyPKQI3C8CG0ZSC9ABZ1E3umdA3CEueNOmP/TChNq
1706 Cl23+BG1Qb/PJkpAO+GfpWSVhTcV53Mf/cKvFHcjGNrxzdSoq9fyW7a6gfcGEQY0
1707 LVkmwFWUfJ0wT8kaeLr0E0tozkIfo01KNWNzv6NcYP80QOBRDlApWu9ODmEVJHPD
1708 blx4jzTQ3JLa+4DvBNOjVUOp+mgRmjiW0rLdrxwOxIqIOwNjweMCp/hgxX/hTQID
1709 AQABoxEwDzANBgNVHR4EBjAEoAChADANBgkqhkiG9w0BAQsFAAOCAQEAWG+/zUMH
1710 QhP8uNCtgSHyim/vh7wminwAvWgMKxlkLBFns6nZeQqsOV1lABY7U0Zuoqa1Z5nb
1711 6L+iJa4ElREJOi/erLc9uLwBdDCAR0hUTKD7a6i4ooS39DTle87cUnj0MW1CUa6H
1712 v5SsvpYW+1XleYJk/axQOOTcy4Es53dvnZsjXH0EA/QHnn7UV+JmlE3rtVxcYp6M
1713 LYPmRhTioROA/drghicRkiu9hxdPyxkYS16M5g3Zj30jdm+k/6C6PeNtN9YmOOga
1714 nCOSyFYfGhqOANYzpmuV+oIedAsPpIbfIzN8njYUs1zio+1IoI4o8ddM9sCbtPU8
1715 o+WoY6IsCKXV/g==
1716 -----END CERTIFICATE-----`
1717
1718 func TestEmptyNameConstraints(t *testing.T) {
1719         block, _ := pem.Decode([]byte(emptyNameConstraintsPEM))
1720         _, err := ParseCertificate(block.Bytes)
1721         if err == nil {
1722                 t.Fatal("unexpected success")
1723         }
1724
1725         const expected = "empty name constraints"
1726         if str := err.Error(); !strings.Contains(str, expected) {
1727                 t.Errorf("expected %q in error but got %q", expected, str)
1728         }
1729 }
1730
1731 func TestPKIXNameString(t *testing.T) {
1732         pem, err := hex.DecodeString(certBytes)
1733         if err != nil {
1734                 t.Fatal(err)
1735         }
1736         certs, err := ParseCertificates(pem)
1737         if err != nil {
1738                 t.Fatal(err)
1739         }
1740
1741         tests := []struct {
1742                 dn   pkix.Name
1743                 want string
1744         }{
1745                 {pkix.Name{
1746                         CommonName:         "Steve Kille",
1747                         Organization:       []string{"Isode Limited"},
1748                         OrganizationalUnit: []string{"RFCs"},
1749                         Locality:           []string{"Richmond"},
1750                         Province:           []string{"Surrey"},
1751                         StreetAddress:      []string{"The Square"},
1752                         PostalCode:         []string{"TW9 1DT"},
1753                         SerialNumber:       "RFC 2253",
1754                         Country:            []string{"GB"},
1755                 }, "SERIALNUMBER=RFC 2253,CN=Steve Kille,OU=RFCs,O=Isode Limited,POSTALCODE=TW9 1DT,STREET=The Square,L=Richmond,ST=Surrey,C=GB"},
1756                 {certs[0].Subject,
1757                         "CN=mail.google.com,O=Google Inc,L=Mountain View,ST=California,C=US"},
1758                 {pkix.Name{
1759                         Organization: []string{"#Google, Inc. \n-> 'Alphabet\" "},
1760                         Country:      []string{"US"},
1761                 }, "O=\\#Google\\, Inc. \n-\\> 'Alphabet\\\"\\ ,C=US"},
1762                 {pkix.Name{
1763                         CommonName:   "foo.com",
1764                         Organization: []string{"Gopher Industries"},
1765                         ExtraNames: []pkix.AttributeTypeAndValue{
1766                                 {Type: asn1.ObjectIdentifier([]int{2, 5, 4, 3}), Value: "bar.com"}},
1767                 }, "CN=bar.com,O=Gopher Industries"},
1768                 {pkix.Name{
1769                         Locality: []string{"Gophertown"},
1770                         ExtraNames: []pkix.AttributeTypeAndValue{
1771                                 {Type: asn1.ObjectIdentifier([]int{1, 2, 3, 4, 5}), Value: "golang.org"}},
1772                 }, "1.2.3.4.5=#130a676f6c616e672e6f7267,L=Gophertown"},
1773         }
1774
1775         for i, test := range tests {
1776                 if got := test.dn.String(); got != test.want {
1777                         t.Errorf("#%d: String() = \n%s\n, want \n%s", i, got, test.want)
1778                 }
1779         }
1780 }
1781
1782 func TestRDNSequenceString(t *testing.T) {
1783         // Test some extra cases that get lost in pkix.Name conversions such as
1784         // multi-valued attributes.
1785
1786         var (
1787                 oidCountry            = []int{2, 5, 4, 6}
1788                 oidOrganization       = []int{2, 5, 4, 10}
1789                 oidOrganizationalUnit = []int{2, 5, 4, 11}
1790                 oidCommonName         = []int{2, 5, 4, 3}
1791         )
1792
1793         tests := []struct {
1794                 seq  pkix.RDNSequence
1795                 want string
1796         }{
1797                 {
1798                         seq: pkix.RDNSequence{
1799                                 pkix.RelativeDistinguishedNameSET{
1800                                         pkix.AttributeTypeAndValue{Type: oidCountry, Value: "US"},
1801                                 },
1802                                 pkix.RelativeDistinguishedNameSET{
1803                                         pkix.AttributeTypeAndValue{Type: oidOrganization, Value: "Widget Inc."},
1804                                 },
1805                                 pkix.RelativeDistinguishedNameSET{
1806                                         pkix.AttributeTypeAndValue{Type: oidOrganizationalUnit, Value: "Sales"},
1807                                         pkix.AttributeTypeAndValue{Type: oidCommonName, Value: "J. Smith"},
1808                                 },
1809                         },
1810                         want: "OU=Sales+CN=J. Smith,O=Widget Inc.,C=US",
1811                 },
1812         }
1813
1814         for i, test := range tests {
1815                 if got := test.seq.String(); got != test.want {
1816                         t.Errorf("#%d: String() = \n%s\n, want \n%s", i, got, test.want)
1817                 }
1818         }
1819 }
1820
1821 const criticalNameConstraintWithUnknownTypePEM = `
1822 -----BEGIN CERTIFICATE-----
1823 MIIC/TCCAeWgAwIBAgICEjQwDQYJKoZIhvcNAQELBQAwKDEmMCQGA1UEAxMdRW1w
1824 dHkgbmFtZSBjb25zdHJhaW50cyBpc3N1ZXIwHhcNMTMwMjAxMDAwMDAwWhcNMjAw
1825 NTMwMTA0ODM4WjAhMR8wHQYDVQQDExZFbXB0eSBuYW1lIGNvbnN0cmFpbnRzMIIB
1826 IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwriElUIt3LCqmJObs+yDoWPD
1827 F5IqgWk6moIobYjPfextZiYU6I3EfvAwoNxPDkN2WowcocUZMJbEeEq5ebBksFnx
1828 f12gBxlIViIYwZAzu7aFvhDMyPKQI3C8CG0ZSC9ABZ1E3umdA3CEueNOmP/TChNq
1829 Cl23+BG1Qb/PJkpAO+GfpWSVhTcV53Mf/cKvFHcjGNrxzdSoq9fyW7a6gfcGEQY0
1830 LVkmwFWUfJ0wT8kaeLr0E0tozkIfo01KNWNzv6NcYP80QOBRDlApWu9ODmEVJHPD
1831 blx4jzTQ3JLa+4DvBNOjVUOp+mgRmjiW0rLdrxwOxIqIOwNjweMCp/hgxX/hTQID
1832 AQABozgwNjA0BgNVHR4BAf8EKjAooCQwIokgIACrzQAAAAAAAAAAAAAAAP////8A
1833 AAAAAAAAAAAAAAChADANBgkqhkiG9w0BAQsFAAOCAQEAWG+/zUMHQhP8uNCtgSHy
1834 im/vh7wminwAvWgMKxlkLBFns6nZeQqsOV1lABY7U0Zuoqa1Z5nb6L+iJa4ElREJ
1835 Oi/erLc9uLwBdDCAR0hUTKD7a6i4ooS39DTle87cUnj0MW1CUa6Hv5SsvpYW+1Xl
1836 eYJk/axQOOTcy4Es53dvnZsjXH0EA/QHnn7UV+JmlE3rtVxcYp6MLYPmRhTioROA
1837 /drghicRkiu9hxdPyxkYS16M5g3Zj30jdm+k/6C6PeNtN9YmOOganCOSyFYfGhqO
1838 ANYzpmuV+oIedAsPpIbfIzN8njYUs1zio+1IoI4o8ddM9sCbtPU8o+WoY6IsCKXV
1839 /g==
1840 -----END CERTIFICATE-----`
1841
1842 func TestCriticalNameConstraintWithUnknownType(t *testing.T) {
1843         block, _ := pem.Decode([]byte(criticalNameConstraintWithUnknownTypePEM))
1844         cert, err := ParseCertificate(block.Bytes)
1845         if err != nil {
1846                 t.Fatalf("unexpected parsing failure: %s", err)
1847         }
1848
1849         if l := len(cert.UnhandledCriticalExtensions); l != 1 {
1850                 t.Fatalf("expected one unhandled critical extension, but found %d", l)
1851         }
1852 }
1853
1854 const badIPMaskPEM = `
1855 -----BEGIN CERTIFICATE-----
1856 MIICzzCCAbegAwIBAgICEjQwDQYJKoZIhvcNAQELBQAwHTEbMBkGA1UEAxMSQmFk
1857 IElQIG1hc2sgaXNzdWVyMB4XDTEzMDIwMTAwMDAwMFoXDTIwMDUzMDEwNDgzOFow
1858 FjEUMBIGA1UEAxMLQmFkIElQIG1hc2swggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw
1859 ggEKAoIBAQDCuISVQi3csKqYk5uz7IOhY8MXkiqBaTqagihtiM997G1mJhTojcR+
1860 8DCg3E8OQ3ZajByhxRkwlsR4Srl5sGSwWfF/XaAHGUhWIhjBkDO7toW+EMzI8pAj
1861 cLwIbRlIL0AFnUTe6Z0DcIS5406Y/9MKE2oKXbf4EbVBv88mSkA74Z+lZJWFNxXn
1862 cx/9wq8UdyMY2vHN1Kir1/JbtrqB9wYRBjQtWSbAVZR8nTBPyRp4uvQTS2jOQh+j
1863 TUo1Y3O/o1xg/zRA4FEOUCla704OYRUkc8NuXHiPNNDcktr7gO8E06NVQ6n6aBGa
1864 OJbSst2vHA7Eiog7A2PB4wKn+GDFf+FNAgMBAAGjIDAeMBwGA1UdHgEB/wQSMBCg
1865 DDAKhwgBAgME//8BAKEAMA0GCSqGSIb3DQEBCwUAA4IBAQBYb7/NQwdCE/y40K2B
1866 IfKKb++HvCaKfAC9aAwrGWQsEWezqdl5Cqw5XWUAFjtTRm6iprVnmdvov6IlrgSV
1867 EQk6L96stz24vAF0MIBHSFRMoPtrqLiihLf0NOV7ztxSePQxbUJRroe/lKy+lhb7
1868 VeV5gmT9rFA45NzLgSznd2+dmyNcfQQD9AeeftRX4maUTeu1XFxinowtg+ZGFOKh
1869 E4D92uCGJxGSK72HF0/LGRhLXozmDdmPfSN2b6T/oLo942031iY46BqcI5LIVh8a
1870 Go4A1jOma5X6gh50Cw+kht8jM3yeNhSzXOKj7Uigjijx10z2wJu09Tyj5ahjoiwI
1871 pdX+
1872 -----END CERTIFICATE-----`
1873
1874 func TestBadIPMask(t *testing.T) {
1875         block, _ := pem.Decode([]byte(badIPMaskPEM))
1876         _, err := ParseCertificate(block.Bytes)
1877         if err == nil {
1878                 t.Fatalf("unexpected success")
1879         }
1880
1881         const expected = "contained invalid mask"
1882         if !strings.Contains(err.Error(), expected) {
1883                 t.Fatalf("expected %q in error but got: %s", expected, err)
1884         }
1885 }
1886
1887 const additionalGeneralSubtreePEM = `
1888 -----BEGIN CERTIFICATE-----
1889 MIIG4TCCBMmgAwIBAgIRALss+4rLw2Ia7tFFhxE8g5cwDQYJKoZIhvcNAQELBQAw
1890 bjELMAkGA1UEBhMCTkwxIDAeBgNVBAoMF01pbmlzdGVyaWUgdmFuIERlZmVuc2ll
1891 MT0wOwYDVQQDDDRNaW5pc3RlcmllIHZhbiBEZWZlbnNpZSBDZXJ0aWZpY2F0aWUg
1892 QXV0b3JpdGVpdCAtIEcyMB4XDTEzMDMwNjEyMDM0OVoXDTEzMTEzMDEyMDM1MFow
1893 bDELMAkGA1UEBhMCVVMxFjAUBgNVBAoTDUNlcnRpUGF0aCBMTEMxIjAgBgNVBAsT
1894 GUNlcnRpZmljYXRpb24gQXV0aG9yaXRpZXMxITAfBgNVBAMTGENlcnRpUGF0aCBC
1895 cmlkZ2UgQ0EgLSBHMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANLW
1896 4kXiRqvwBhJfN9uz12FA+P2D34MPxOt7TGXljm2plJ2CLzvaH8/ymsMdSWdJBS1M
1897 8FmwvNL1w3A6ZuzksJjPikAu8kY3dcp3mrkk9eCPORDAwGtfsXwZysLiuEaDWpbD
1898 dHOaHnI6qWU0N6OI+hNX58EjDpIGC1WQdho1tHOTPc5Hf5/hOpM/29v/wr7kySjs
1899 Z+7nsvkm5rNhuJNzPsLsgzVaJ5/BVyOplZy24FKM8Y43MjR4osZm+a2e0zniqw6/
1900 rvcjcGYabYaznZfQG1GXoyf2Vea+CCgpgUhlVafgkwEs8izl8rIpvBzXiFAgFQuG
1901 Ituoy92PJbDs430fA/cCAwEAAaOCAnowggJ2MEUGCCsGAQUFBwEBBDkwNzA1Bggr
1902 BgEFBQcwAoYpaHR0cDovL2NlcnRzLmNhLm1pbmRlZi5ubC9taW5kZWYtY2EtMi5w
1903 N2MwHwYDVR0jBBgwFoAUzln9WSPz2M64Rl2HYf2/KD8StmQwDwYDVR0TAQH/BAUw
1904 AwEB/zCB6QYDVR0gBIHhMIHeMEgGCmCEEAGHawECBQEwOjA4BggrBgEFBQcCARYs
1905 aHR0cDovL2Nwcy5kcC5jYS5taW5kZWYubmwvbWluZGVmLWNhLWRwLWNwcy8wSAYK
1906 YIQQAYdrAQIFAjA6MDgGCCsGAQUFBwIBFixodHRwOi8vY3BzLmRwLmNhLm1pbmRl
1907 Zi5ubC9taW5kZWYtY2EtZHAtY3BzLzBIBgpghBABh2sBAgUDMDowOAYIKwYBBQUH
1908 AgEWLGh0dHA6Ly9jcHMuZHAuY2EubWluZGVmLm5sL21pbmRlZi1jYS1kcC1jcHMv
1909 MDkGA1UdHwQyMDAwLqAsoCqGKGh0dHA6Ly9jcmxzLmNhLm1pbmRlZi5ubC9taW5k
1910 ZWYtY2EtMi5jcmwwDgYDVR0PAQH/BAQDAgEGMEYGA1UdHgEB/wQ8MDqhODA2pDEw
1911 LzELMAkGA1UEBhMCTkwxIDAeBgNVBAoTF01pbmlzdGVyaWUgdmFuIERlZmVuc2ll
1912 gQFjMF0GA1UdIQRWMFQwGgYKYIQQAYdrAQIFAQYMKwYBBAGBu1MBAQECMBoGCmCE
1913 EAGHawECBQIGDCsGAQQBgbtTAQEBAjAaBgpghBABh2sBAgUDBgwrBgEEAYG7UwEB
1914 AQIwHQYDVR0OBBYEFNDCjBM3M3ZKkag84ei3/aKc0d0UMA0GCSqGSIb3DQEBCwUA
1915 A4ICAQAQXFn9jF90/DNFf15JhoGtta/0dNInb14PMu3PAjcdrXYCDPpQZOArTUng
1916 5YT1WuzfmjnXiTsziT3my0r9Mxvz/btKK/lnVOMW4c2q/8sIsIPnnW5ZaRGrsANB
1917 dNDZkzMYmeG2Pfgvd0AQSOrpE/TVgWfu/+MMRWwX9y6VbooBR7BLv7zMuVH0WqLn
1918 6OMFth7fqsThlfMSzkE/RDSaU6n3wXAWT1SIqBITtccRjSUQUFm/q3xrb2cwcZA6
1919 8vdS4hzNd+ttS905ay31Ks4/1Wrm1bH5RhEfRSH0VSXnc0b+z+RyBbmiwtVZqzxE
1920 u3UQg/rAmtLDclLFEzjp8YDTIRYSLwstDbEXO/0ArdGrQm79HQ8i/3ZbP2357myW
1921 i15qd6gMJIgGHS4b8Hc7R1K8LQ9Gm1aLKBEWVNGZlPK/cpXThpVmoEyslN2DHCrc
1922 fbMbjNZpXlTMa+/b9z7Fa4X8dY8u/ELzZuJXJv5Rmqtg29eopFFYDCl0Nkh1XAjo
1923 QejEoHHUvYV8TThHZr6Z6Ib8CECgTehU4QvepkgDXNoNrKRZBG0JhLjkwxh2whZq
1924 nvWBfALC2VuNOM6C0rDY+HmhMlVt0XeqnybD9MuQALMit7Z00Cw2CIjNsBI9xBqD
1925 xKK9CjUb7gzRUWSpB9jGHsvpEMHOzIFhufvH2Bz1XJw+Cl7khw==
1926 -----END CERTIFICATE-----`
1927
1928 func TestAdditionFieldsInGeneralSubtree(t *testing.T) {
1929         // Very rarely, certificates can include additional fields in the
1930         // GeneralSubtree structure. This tests that such certificates can be
1931         // parsed.
1932         block, _ := pem.Decode([]byte(additionalGeneralSubtreePEM))
1933         if _, err := ParseCertificate(block.Bytes); err != nil {
1934                 t.Fatalf("failed to parse certificate: %s", err)
1935         }
1936 }
1937
1938 func TestEmptySubject(t *testing.T) {
1939         template := Certificate{
1940                 SerialNumber: big.NewInt(1),
1941                 DNSNames:     []string{"example.com"},
1942         }
1943
1944         derBytes, err := CreateCertificate(rand.Reader, &template, &template, &testPrivateKey.PublicKey, testPrivateKey)
1945         if err != nil {
1946                 t.Fatalf("failed to create certificate: %s", err)
1947         }
1948
1949         cert, err := ParseCertificate(derBytes)
1950         if err != nil {
1951                 t.Fatalf("failed to parse certificate: %s", err)
1952         }
1953
1954         for _, ext := range cert.Extensions {
1955                 if ext.Id.Equal(oidExtensionSubjectAltName) {
1956                         if !ext.Critical {
1957                                 t.Fatal("SAN extension is not critical")
1958                         }
1959                         return
1960                 }
1961         }
1962
1963         t.Fatal("SAN extension is missing")
1964 }
1965
1966 // multipleURLsInCRLDPPEM contains two URLs in a single CRL DistributionPoint
1967 // structure. It is taken from https://crt.sh/?id=12721534.
1968 const multipleURLsInCRLDPPEM = `
1969 -----BEGIN CERTIFICATE-----
1970 MIIF4TCCBMmgAwIBAgIQc+6uFePfrahUGpXs8lhiTzANBgkqhkiG9w0BAQsFADCB
1971 8zELMAkGA1UEBhMCRVMxOzA5BgNVBAoTMkFnZW5jaWEgQ2F0YWxhbmEgZGUgQ2Vy
1972 dGlmaWNhY2lvIChOSUYgUS0wODAxMTc2LUkpMSgwJgYDVQQLEx9TZXJ2ZWlzIFB1
1973 YmxpY3MgZGUgQ2VydGlmaWNhY2lvMTUwMwYDVQQLEyxWZWdldSBodHRwczovL3d3
1974 dy5jYXRjZXJ0Lm5ldC92ZXJhcnJlbCAoYykwMzE1MDMGA1UECxMsSmVyYXJxdWlh
1975 IEVudGl0YXRzIGRlIENlcnRpZmljYWNpbyBDYXRhbGFuZXMxDzANBgNVBAMTBkVD
1976 LUFDQzAeFw0xNDA5MTgwODIxMDBaFw0zMDA5MTgwODIxMDBaMIGGMQswCQYDVQQG
1977 EwJFUzEzMDEGA1UECgwqQ09OU09SQ0kgQURNSU5JU1RSQUNJTyBPQkVSVEEgREUg
1978 Q0FUQUxVTllBMSowKAYDVQQLDCFTZXJ2ZWlzIFDDumJsaWNzIGRlIENlcnRpZmlj
1979 YWNpw7MxFjAUBgNVBAMMDUVDLUNpdXRhZGFuaWEwggEiMA0GCSqGSIb3DQEBAQUA
1980 A4IBDwAwggEKAoIBAQDFkHPRZPZlXTWZ5psJhbS/Gx+bxcTpGrlVQHHtIkgGz77y
1981 TA7UZUFb2EQMncfbOhR0OkvQQn1aMvhObFJSR6nI+caf2D+h/m/InMl1MyH3S0Ak
1982 YGZZsthnyC6KxqK2A/NApncrOreh70ULkQs45aOKsi1kR1W0zE+iFN+/P19P7AkL
1983 Rl3bXBCVd8w+DLhcwRrkf1FCDw6cEqaFm3cGgf5cbBDMaVYAweWTxwBZAq2RbQAW
1984 jE7mledcYghcZa4U6bUmCBPuLOnO8KMFAvH+aRzaf3ws5/ZoOVmryyLLJVZ54peZ
1985 OwnP9EL4OuWzmXCjBifXR2IAblxs5JYj57tls45nAgMBAAGjggHaMIIB1jASBgNV
1986 HRMBAf8ECDAGAQH/AgEAMA4GA1UdDwEB/wQEAwIBBjAdBgNVHQ4EFgQUC2hZPofI
1987 oxUa4ECCIl+fHbLFNxUwHwYDVR0jBBgwFoAUoMOLRKo3pUW/l4Ba0fF4opvpXY0w
1988 gdYGA1UdIASBzjCByzCByAYEVR0gADCBvzAxBggrBgEFBQcCARYlaHR0cHM6Ly93
1989 d3cuYW9jLmNhdC9DQVRDZXJ0L1JlZ3VsYWNpbzCBiQYIKwYBBQUHAgIwfQx7QXF1
1990 ZXN0IGNlcnRpZmljYXQgw6lzIGVtw6hzIMO6bmljYSBpIGV4Y2x1c2l2YW1lbnQg
1991 YSBFbnRpdGF0cyBkZSBDZXJ0aWZpY2FjacOzLiBWZWdldSBodHRwczovL3d3dy5h
1992 b2MuY2F0L0NBVENlcnQvUmVndWxhY2lvMDMGCCsGAQUFBwEBBCcwJTAjBggrBgEF
1993 BQcwAYYXaHR0cDovL29jc3AuY2F0Y2VydC5jYXQwYgYDVR0fBFswWTBXoFWgU4Yn
1994 aHR0cDovL2Vwc2NkLmNhdGNlcnQubmV0L2NybC9lYy1hY2MuY3JshihodHRwOi8v
1995 ZXBzY2QyLmNhdGNlcnQubmV0L2NybC9lYy1hY2MuY3JsMA0GCSqGSIb3DQEBCwUA
1996 A4IBAQChqFTjlAH5PyIhLjLgEs68CyNNC1+vDuZXRhy22TI83JcvGmQrZosPvVIL
1997 PsUXx+C06Pfqmh48Q9S89X9K8w1SdJxP/rZeGEoRiKpwvQzM4ArD9QxyC8jirxex
1998 3Umg9Ai/sXQ+1lBf6xw4HfUUr1WIp7pNHj0ZWLo106urqktcdeAFWme+/klis5fu
1999 labCSVPuT/QpwakPrtqOhRms8vgpKiXa/eLtL9ZiA28X/Mker0zlAeTA7Z7uAnp6
2000 oPJTlZu1Gg1ZDJueTWWsLlO+P+Wzm3MRRIbcgdRzm4mdO7ubu26SzX/aQXDhuih+
2001 eVxXDTCfs7GUlxnjOp5j559X/N0A
2002 -----END CERTIFICATE-----
2003 `
2004
2005 func TestMultipleURLsInCRLDP(t *testing.T) {
2006         block, _ := pem.Decode([]byte(multipleURLsInCRLDPPEM))
2007         cert, err := ParseCertificate(block.Bytes)
2008         if err != nil {
2009                 t.Fatalf("failed to parse certificate: %s", err)
2010         }
2011
2012         want := []string{
2013                 "http://epscd.catcert.net/crl/ec-acc.crl",
2014                 "http://epscd2.catcert.net/crl/ec-acc.crl",
2015         }
2016         if got := cert.CRLDistributionPoints; !reflect.DeepEqual(got, want) {
2017                 t.Errorf("CRL distribution points = %#v, want #%v", got, want)
2018         }
2019 }