net/cert/cert_verify_proc.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/cert/cert_verify_proc.h"
   6
   7 #include <stdint.h>
   8
   9 #include "base/metrics/histogram.h"
  10 #include "base/metrics/histogram_macros.h"
  11 #include "base/sha1.h"
  12 #include "base/strings/stringprintf.h"
  13 #include "base/time/time.h"
  14 #include "build/build_config.h"
  15 #include "net/base/net_errors.h"
  16 #include "net/base/net_util.h"
  17 #include "net/base/registry_controlled_domains/registry_controlled_domain.h"
  18 #include "net/cert/cert_status_flags.h"
  19 #include "net/cert/cert_verifier.h"
  20 #include "net/cert/cert_verify_proc_whitelist.h"
  21 #include "net/cert/cert_verify_result.h"
  22 #include "net/cert/crl_set.h"
  23 #include "net/cert/x509_certificate.h"
  24 #include "url/url_canon.h"
  25
  26 #if defined(USE_NSS_CERTS) || defined(OS_IOS)
  27 #include "net/cert/cert_verify_proc_nss.h"
  28 #elif defined(USE_OPENSSL_CERTS) && !defined(OS_ANDROID)
  29 #include "net/cert/cert_verify_proc_openssl.h"
  30 #elif defined(OS_ANDROID)
  31 #include "net/cert/cert_verify_proc_android.h"
  32 #elif defined(OS_MACOSX)
  33 #include "net/cert/cert_verify_proc_mac.h"
  34 #elif defined(OS_WIN)
  35 #include "net/cert/cert_verify_proc_win.h"
  36 #else
  37 #error Implement certificate verification.
  38 #endif
  39
  40 namespace net {
  41
  42 namespace {
  43
  44 // Constants used to build histogram names
  45 const char kLeafCert[] = "Leaf";
  46 const char kIntermediateCert[] = "Intermediate";
  47 const char kRootCert[] = "Root";
  48 // Matches the order of X509Certificate::PublicKeyType
  49 const char* const kCertTypeStrings[] = {
  50     "Unknown",
  51     "RSA",
  52     "DSA",
  53     "ECDSA",
  54     "DH",
  55     "ECDH"
  56 };
  57 // Histogram buckets for RSA/DSA/DH key sizes.
  58 const int kRsaDsaKeySizes[] = {512, 768, 1024, 1536, 2048, 3072, 4096, 8192,
  59                                16384};
  60 // Histogram buckets for ECDSA/ECDH key sizes. The list is based upon the FIPS
  61 // 186-4 approved curves.
  62 const int kEccKeySizes[] = {163, 192, 224, 233, 256, 283, 384, 409, 521, 571};
  63
  64 const char* CertTypeToString(int cert_type) {
  65   if (cert_type < 0 ||
  66       static_cast<size_t>(cert_type) >= arraysize(kCertTypeStrings)) {
  67     return "Unsupported";
  68   }
  69   return kCertTypeStrings[cert_type];
  70 }
  71
  72 void RecordPublicKeyHistogram(const char* chain_position,
  73                               bool baseline_keysize_applies,
  74                               size_t size_bits,
  75                               X509Certificate::PublicKeyType cert_type) {
  76   std::string histogram_name =
  77       base::StringPrintf("CertificateType2.%s.%s.%s",
  78                          baseline_keysize_applies ? "BR" : "NonBR",
  79                          chain_position,
  80                          CertTypeToString(cert_type));
  81   // Do not use UMA_HISTOGRAM_... macros here, as it caches the Histogram
  82   // instance and thus only works if |histogram_name| is constant.
  83   base::HistogramBase* counter = NULL;
  84
  85   // Histogram buckets are contingent upon the underlying algorithm being used.
  86   if (cert_type == X509Certificate::kPublicKeyTypeECDH ||
  87       cert_type == X509Certificate::kPublicKeyTypeECDSA) {
  88     // Typical key sizes match SECP/FIPS 186-3 recommendations for prime and
  89     // binary curves - which range from 163 bits to 571 bits.
  90     counter = base::CustomHistogram::FactoryGet(
  91         histogram_name,
  92         base::CustomHistogram::ArrayToCustomRanges(kEccKeySizes,
  93                                                    arraysize(kEccKeySizes)),
  94         base::HistogramBase::kUmaTargetedHistogramFlag);
  95   } else {
  96     // Key sizes < 1024 bits should cause errors, while key sizes > 16K are not
  97     // uniformly supported by the underlying cryptographic libraries.
  98     counter = base::CustomHistogram::FactoryGet(
  99         histogram_name,
 100         base::CustomHistogram::ArrayToCustomRanges(kRsaDsaKeySizes,
 101                                                    arraysize(kRsaDsaKeySizes)),
 102         base::HistogramBase::kUmaTargetedHistogramFlag);
 103   }
 104   counter->Add(size_bits);
 105 }
 106
 107 // Returns true if |type| is |kPublicKeyTypeRSA| or |kPublicKeyTypeDSA|, and
 108 // if |size_bits| is < 1024. Note that this means there may be false
 109 // negatives: keys for other algorithms and which are weak will pass this
 110 // test.
 111 bool IsWeakKey(X509Certificate::PublicKeyType type, size_t size_bits) {
 112   switch (type) {
 113     case X509Certificate::kPublicKeyTypeRSA:
 114     case X509Certificate::kPublicKeyTypeDSA:
 115       return size_bits < 1024;
 116     default:
 117       return false;
 118   }
 119 }
 120
 121 // Returns true if |cert| contains a known-weak key. Additionally, histograms
 122 // the observed keys for future tightening of the definition of what
 123 // constitutes a weak key.
 124 bool ExaminePublicKeys(const scoped_refptr<X509Certificate>& cert,
 125                        bool should_histogram) {
 126   // The effective date of the CA/Browser Forum's Baseline Requirements -
 127   // 2012-07-01 00:00:00 UTC.
 128   const base::Time kBaselineEffectiveDate =
 129       base::Time::FromInternalValue(INT64_C(12985574400000000));
 130   // The effective date of the key size requirements from Appendix A, v1.1.5
 131   // 2014-01-01 00:00:00 UTC.
 132   const base::Time kBaselineKeysizeEffectiveDate =
 133       base::Time::FromInternalValue(INT64_C(13033008000000000));
 134
 135   size_t size_bits = 0;
 136   X509Certificate::PublicKeyType type = X509Certificate::kPublicKeyTypeUnknown;
 137   bool weak_key = false;
 138   bool baseline_keysize_applies =
 139       cert->valid_start() >= kBaselineEffectiveDate &&
 140       cert->valid_expiry() >= kBaselineKeysizeEffectiveDate;
 141
 142   X509Certificate::GetPublicKeyInfo(cert->os_cert_handle(), &size_bits, &type);
 143   if (should_histogram) {
 144     RecordPublicKeyHistogram(kLeafCert, baseline_keysize_applies, size_bits,
 145                              type);
 146   }
 147   if (IsWeakKey(type, size_bits))
 148     weak_key = true;
 149
 150   const X509Certificate::OSCertHandles& intermediates =
 151       cert->GetIntermediateCertificates();
 152   for (size_t i = 0; i < intermediates.size(); ++i) {
 153     X509Certificate::GetPublicKeyInfo(intermediates[i], &size_bits, &type);
 154     if (should_histogram) {
 155       RecordPublicKeyHistogram(
 156           (i < intermediates.size() - 1) ? kIntermediateCert : kRootCert,
 157           baseline_keysize_applies,
 158           size_bits,
 159           type);
 160     }
 161     if (!weak_key && IsWeakKey(type, size_bits))
 162       weak_key = true;
 163   }
 164
 165   return weak_key;
 166 }
 167
 168 }  // namespace
 169
 170 // static
 171 CertVerifyProc* CertVerifyProc::CreateDefault() {
 172 #if defined(USE_NSS_CERTS) || defined(OS_IOS)
 173   return new CertVerifyProcNSS();
 174 #elif defined(USE_OPENSSL_CERTS) && !defined(OS_ANDROID)
 175   return new CertVerifyProcOpenSSL();
 176 #elif defined(OS_ANDROID)
 177   return new CertVerifyProcAndroid();
 178 #elif defined(OS_MACOSX)
 179   return new CertVerifyProcMac();
 180 #elif defined(OS_WIN)
 181   return new CertVerifyProcWin();
 182 #else
 183   return NULL;
 184 #endif
 185 }
 186
 187 CertVerifyProc::CertVerifyProc() {}
 188
 189 CertVerifyProc::~CertVerifyProc() {}
 190
 191 int CertVerifyProc::Verify(X509Certificate* cert,
 192                            const std::string& hostname,
 193                            const std::string& ocsp_response,
 194                            int flags,
 195                            CRLSet* crl_set,
 196                            const CertificateList& additional_trust_anchors,
 197                            CertVerifyResult* verify_result) {
 198   verify_result->Reset();
 199   verify_result->verified_cert = cert;
 200
 201   if (IsBlacklisted(cert)) {
 202     verify_result->cert_status |= CERT_STATUS_REVOKED;
 203     return ERR_CERT_REVOKED;
 204   }
 205
 206   // We do online revocation checking for EV certificates that aren't covered
 207   // by a fresh CRLSet.
 208   // TODO(rsleevi): http://crbug.com/142974 - Allow preferences to fully
 209   // disable revocation checking.
 210   if (flags & CertVerifier::VERIFY_EV_CERT)
 211     flags |= CertVerifier::VERIFY_REV_CHECKING_ENABLED_EV_ONLY;
 212
 213   int rv = VerifyInternal(cert, hostname, ocsp_response, flags, crl_set,
 214                           additional_trust_anchors, verify_result);
 215
 216   UMA_HISTOGRAM_BOOLEAN("Net.CertCommonNameFallback",
 217                         verify_result->common_name_fallback_used);
 218   if (!verify_result->is_issued_by_known_root) {
 219     UMA_HISTOGRAM_BOOLEAN("Net.CertCommonNameFallbackPrivateCA",
 220                           verify_result->common_name_fallback_used);
 221   }
 222
 223   // This check is done after VerifyInternal so that VerifyInternal can fill
 224   // in the list of public key hashes.
 225   if (IsPublicKeyBlacklisted(verify_result->public_key_hashes)) {
 226     verify_result->cert_status |= CERT_STATUS_REVOKED;
 227     rv = MapCertStatusToNetError(verify_result->cert_status);
 228   }
 229
 230   std::vector<std::string> dns_names, ip_addrs;
 231   cert->GetSubjectAltName(&dns_names, &ip_addrs);
 232   if (HasNameConstraintsViolation(verify_result->public_key_hashes,
 233                                   cert->subject().common_name,
 234                                   dns_names,
 235                                   ip_addrs)) {
 236     verify_result->cert_status |= CERT_STATUS_NAME_CONSTRAINT_VIOLATION;
 237     rv = MapCertStatusToNetError(verify_result->cert_status);
 238   }
 239
 240   if (IsNonWhitelistedCertificate(*verify_result->verified_cert,
 241                                   verify_result->public_key_hashes)) {
 242     verify_result->cert_status |= CERT_STATUS_AUTHORITY_INVALID;
 243     rv = MapCertStatusToNetError(verify_result->cert_status);
 244   }
 245
 246   // Check for weak keys in the entire verified chain.
 247   bool weak_key = ExaminePublicKeys(verify_result->verified_cert,
 248                                     verify_result->is_issued_by_known_root);
 249
 250   if (weak_key) {
 251     verify_result->cert_status |= CERT_STATUS_WEAK_KEY;
 252     // Avoid replacing a more serious error, such as an OS/library failure,
 253     // by ensuring that if verification failed, it failed with a certificate
 254     // error.
 255     if (rv == OK || IsCertificateError(rv))
 256       rv = MapCertStatusToNetError(verify_result->cert_status);
 257   }
 258
 259   // Treat certificates signed using broken signature algorithms as invalid.
 260   if (verify_result->has_md2 || verify_result->has_md4) {
 261     verify_result->cert_status |= CERT_STATUS_INVALID;
 262     rv = MapCertStatusToNetError(verify_result->cert_status);
 263   }
 264
 265   // Flag certificates using weak signature algorithms.
 266   if (verify_result->has_md5) {
 267     verify_result->cert_status |= CERT_STATUS_WEAK_SIGNATURE_ALGORITHM;
 268     // Avoid replacing a more serious error, such as an OS/library failure,
 269     // by ensuring that if verification failed, it failed with a certificate
 270     // error.
 271     if (rv == OK || IsCertificateError(rv))
 272       rv = MapCertStatusToNetError(verify_result->cert_status);
 273   }
 274
 275   if (verify_result->has_sha1)
 276     verify_result->cert_status |= CERT_STATUS_SHA1_SIGNATURE_PRESENT;
 277
 278   // Flag certificates from publicly-trusted CAs that are issued to intranet
 279   // hosts. While the CA/Browser Forum Baseline Requirements (v1.1) permit
 280   // these to be issued until 1 November 2015, they represent a real risk for
 281   // the deployment of gTLDs and are being phased out ahead of the hard
 282   // deadline.
 283   if (verify_result->is_issued_by_known_root && IsHostnameNonUnique(hostname)) {
 284     verify_result->cert_status |= CERT_STATUS_NON_UNIQUE_NAME;
 285     // CERT_STATUS_NON_UNIQUE_NAME will eventually become a hard error. For
 286     // now treat it as a warning and do not map it to an error return value.
 287   }
 288
 289   // Flag certificates using too long validity periods.
 290   if (verify_result->is_issued_by_known_root && HasTooLongValidity(*cert)) {
 291     verify_result->cert_status |= CERT_STATUS_VALIDITY_TOO_LONG;
 292     if (rv == OK)
 293       rv = MapCertStatusToNetError(verify_result->cert_status);
 294   }
 295
 296   return rv;
 297 }
 298
 299 // static
 300 bool CertVerifyProc::IsBlacklisted(X509Certificate* cert) {
 301   static const unsigned kComodoSerialBytes = 16;
 302   static const uint8_t kComodoSerials[][kComodoSerialBytes] = {
 303     // Not a real certificate. For testing only.
 304     {0x07,0x7a,0x59,0xbc,0xd5,0x34,0x59,0x60,0x1c,0xa6,0x90,0x72,0x67,0xa6,0xdd,0x1c},
 305
 306     // The next nine certificates all expire on Fri Mar 14 23:59:59 2014.
 307     // Some serial numbers actually have a leading 0x00 byte required to
 308     // encode a positive integer in DER if the most significant bit is 0.
 309     // We omit the leading 0x00 bytes to make all serial numbers 16 bytes.
 310
 311     // Subject: CN=mail.google.com
 312     // subjectAltName dNSName: mail.google.com, www.mail.google.com
 313     {0x04,0x7e,0xcb,0xe9,0xfc,0xa5,0x5f,0x7b,0xd0,0x9e,0xae,0x36,0xe1,0x0c,0xae,0x1e},
 314     // Subject: CN=global trustee
 315     // subjectAltName dNSName: global trustee
 316     // Note: not a CA certificate.
 317     {0xd8,0xf3,0x5f,0x4e,0xb7,0x87,0x2b,0x2d,0xab,0x06,0x92,0xe3,0x15,0x38,0x2f,0xb0},
 318     // Subject: CN=login.live.com
 319     // subjectAltName dNSName: login.live.com, www.login.live.com
 320     {0xb0,0xb7,0x13,0x3e,0xd0,0x96,0xf9,0xb5,0x6f,0xae,0x91,0xc8,0x74,0xbd,0x3a,0xc0},
 321     // Subject: CN=addons.mozilla.org
 322     // subjectAltName dNSName: addons.mozilla.org, www.addons.mozilla.org
 323     {0x92,0x39,0xd5,0x34,0x8f,0x40,0xd1,0x69,0x5a,0x74,0x54,0x70,0xe1,0xf2,0x3f,0x43},
 324     // Subject: CN=login.skype.com
 325     // subjectAltName dNSName: login.skype.com, www.login.skype.com
 326     {0xe9,0x02,0x8b,0x95,0x78,0xe4,0x15,0xdc,0x1a,0x71,0x0a,0x2b,0x88,0x15,0x44,0x47},
 327     // Subject: CN=login.yahoo.com
 328     // subjectAltName dNSName: login.yahoo.com, www.login.yahoo.com
 329     {0xd7,0x55,0x8f,0xda,0xf5,0xf1,0x10,0x5b,0xb2,0x13,0x28,0x2b,0x70,0x77,0x29,0xa3},
 330     // Subject: CN=www.google.com
 331     // subjectAltName dNSName: www.google.com, google.com
 332     {0xf5,0xc8,0x6a,0xf3,0x61,0x62,0xf1,0x3a,0x64,0xf5,0x4f,0x6d,0xc9,0x58,0x7c,0x06},
 333     // Subject: CN=login.yahoo.com
 334     // subjectAltName dNSName: login.yahoo.com
 335     {0x39,0x2a,0x43,0x4f,0x0e,0x07,0xdf,0x1f,0x8a,0xa3,0x05,0xde,0x34,0xe0,0xc2,0x29},
 336     // Subject: CN=login.yahoo.com
 337     // subjectAltName dNSName: login.yahoo.com
 338     {0x3e,0x75,0xce,0xd4,0x6b,0x69,0x30,0x21,0x21,0x88,0x30,0xae,0x86,0xa8,0x2a,0x71},
 339   };
 340
 341   const std::string& serial_number = cert->serial_number();
 342   if (!serial_number.empty() && (serial_number[0] & 0x80) != 0) {
 343     // This is a negative serial number, which isn't technically allowed but
 344     // which probably happens. In order to avoid confusing a negative serial
 345     // number with a positive one once the leading zeros have been removed, we
 346     // disregard it.
 347     return false;
 348   }
 349
 350   base::StringPiece serial(serial_number);
 351   // Remove leading zeros.
 352   while (serial.size() > 1 && serial[0] == 0)
 353     serial.remove_prefix(1);
 354
 355   if (serial.size() == kComodoSerialBytes) {
 356     for (unsigned i = 0; i < arraysize(kComodoSerials); i++) {
 357       if (memcmp(kComodoSerials[i], serial.data(), kComodoSerialBytes) == 0) {
 358         UMA_HISTOGRAM_ENUMERATION("Net.SSLCertBlacklisted", i,
 359                                   arraysize(kComodoSerials) + 1);
 360         return true;
 361       }
 362     }
 363   }
 364
 365   // CloudFlare revoked all certificates issued prior to April 2nd, 2014. Thus
 366   // all certificates where the CN ends with ".cloudflare.com" with a prior
 367   // issuance date are rejected.
 368   //
 369   // The old certs had a lifetime of five years, so this can be removed April
 370   // 2nd, 2019.
 371   const std::string& cn = cert->subject().common_name;
 372   static const char kCloudFlareCNSuffix[] = ".cloudflare.com";
 373   // kCloudFlareEpoch is the base::Time internal value for midnight at the
 374   // beginning of April 2nd, 2014, UTC.
 375   static const int64_t kCloudFlareEpoch = INT64_C(13040870400000000);
 376   if (cn.size() > arraysize(kCloudFlareCNSuffix) - 1 &&
 377       cn.compare(cn.size() - (arraysize(kCloudFlareCNSuffix) - 1),
 378                  arraysize(kCloudFlareCNSuffix) - 1,
 379                  kCloudFlareCNSuffix) == 0 &&
 380       cert->valid_start() < base::Time::FromInternalValue(kCloudFlareEpoch)) {
 381     return true;
 382   }
 383
 384   return false;
 385 }
 386
 387 // static
 388 // NOTE: This implementation assumes and enforces that the hashes are SHA1.
 389 bool CertVerifyProc::IsPublicKeyBlacklisted(
 390     const HashValueVector& public_key_hashes) {
 391   static const unsigned kNumHashes = 17;
 392   static const uint8_t kHashes[kNumHashes][base::kSHA1Length] = {
 393     // Subject: CN=DigiNotar Root CA
 394     // Issuer: CN=Entrust.net x2 and self-signed
 395     {0x41, 0x0f, 0x36, 0x36, 0x32, 0x58, 0xf3, 0x0b, 0x34, 0x7d,
 396      0x12, 0xce, 0x48, 0x63, 0xe4, 0x33, 0x43, 0x78, 0x06, 0xa8},
 397     // Subject: CN=DigiNotar Cyber CA
 398     // Issuer: CN=GTE CyberTrust Global Root
 399     {0xc4, 0xf9, 0x66, 0x37, 0x16, 0xcd, 0x5e, 0x71, 0xd6, 0x95,
 400      0x0b, 0x5f, 0x33, 0xce, 0x04, 0x1c, 0x95, 0xb4, 0x35, 0xd1},
 401     // Subject: CN=DigiNotar Services 1024 CA
 402     // Issuer: CN=Entrust.net
 403     {0xe2, 0x3b, 0x8d, 0x10, 0x5f, 0x87, 0x71, 0x0a, 0x68, 0xd9,
 404      0x24, 0x80, 0x50, 0xeb, 0xef, 0xc6, 0x27, 0xbe, 0x4c, 0xa6},
 405     // Subject: CN=DigiNotar PKIoverheid CA Organisatie - G2
 406     // Issuer: CN=Staat der Nederlanden Organisatie CA - G2
 407     {0x7b, 0x2e, 0x16, 0xbc, 0x39, 0xbc, 0xd7, 0x2b, 0x45, 0x6e,
 408      0x9f, 0x05, 0x5d, 0x1d, 0xe6, 0x15, 0xb7, 0x49, 0x45, 0xdb},
 409     // Subject: CN=DigiNotar PKIoverheid CA Overheid en Bedrijven
 410     // Issuer: CN=Staat der Nederlanden Overheid CA
 411     {0xe8, 0xf9, 0x12, 0x00, 0xc6, 0x5c, 0xee, 0x16, 0xe0, 0x39,
 412      0xb9, 0xf8, 0x83, 0x84, 0x16, 0x61, 0x63, 0x5f, 0x81, 0xc5},
 413     // Subject: O=Digicert Sdn. Bhd.
 414     // Issuer: CN=GTE CyberTrust Global Root
 415     // Expires: Jul 17 15:16:54 2012 GMT
 416     {0x01, 0x29, 0xbc, 0xd5, 0xb4, 0x48, 0xae, 0x8d, 0x24, 0x96,
 417      0xd1, 0xc3, 0xe1, 0x97, 0x23, 0x91, 0x90, 0x88, 0xe1, 0x52},
 418     // Subject: O=Digicert Sdn. Bhd.
 419     // Issuer: CN=Entrust.net Certification Authority (2048)
 420     // Expires: Jul 16 17:53:37 2015 GMT
 421     {0xd3, 0x3c, 0x5b, 0x41, 0xe4, 0x5c, 0xc4, 0xb3, 0xbe, 0x9a,
 422      0xd6, 0x95, 0x2c, 0x4e, 0xcc, 0x25, 0x28, 0x03, 0x29, 0x81},
 423     // Issuer: CN=Trustwave Organization Issuing CA, Level 2
 424     // Covers two certificates, the latter of which expires Apr 15 21:09:30
 425     // 2021 GMT.
 426     {0xe1, 0x2d, 0x89, 0xf5, 0x6d, 0x22, 0x76, 0xf8, 0x30, 0xe6,
 427      0xce, 0xaf, 0xa6, 0x6c, 0x72, 0x5c, 0x0b, 0x41, 0xa9, 0x32},
 428     // Cyberoam CA certificate. Private key leaked, but this certificate would
 429     // only have been installed by Cyberoam customers. The certificate expires
 430     // in 2036, but we can probably remove in a couple of years (2014).
 431     {0xd9, 0xf5, 0xc6, 0xce, 0x57, 0xff, 0xaa, 0x39, 0xcc, 0x7e,
 432      0xd1, 0x72, 0xbd, 0x53, 0xe0, 0xd3, 0x07, 0x83, 0x4b, 0xd1},
 433     // Win32/Sirefef.gen!C generates fake certificates with this public key.
 434     {0xa4, 0xf5, 0x6e, 0x9e, 0x1d, 0x9a, 0x3b, 0x7b, 0x1a, 0xc3,
 435      0x31, 0xcf, 0x64, 0xfc, 0x76, 0x2c, 0xd0, 0x51, 0xfb, 0xa4},
 436     // Three retired intermediate certificates from Symantec. No compromise;
 437     // just for robustness. All expire May 17 23:59:59 2018.
 438     // See https://bugzilla.mozilla.org/show_bug.cgi?id=966060
 439     {0x68, 0x5e, 0xec, 0x0a, 0x39, 0xf6, 0x68, 0xae, 0x8f, 0xd8,
 440      0x96, 0x4f, 0x98, 0x74, 0x76, 0xb4, 0x50, 0x4f, 0xd2, 0xbe},
 441     {0x0e, 0x50, 0x2d, 0x4d, 0xd1, 0xe1, 0x60, 0x36, 0x8a, 0x31,
 442      0xf0, 0x6a, 0x81, 0x04, 0x31, 0xba, 0x6f, 0x72, 0xc0, 0x41},
 443     {0x93, 0xd1, 0x53, 0x22, 0x29, 0xcc, 0x2a, 0xbd, 0x21, 0xdf,
 444      0xf5, 0x97, 0xee, 0x32, 0x0f, 0xe4, 0x24, 0x6f, 0x3d, 0x0c},
 445     // C=IN, O=National Informatics Centre, OU=NICCA, CN=NIC Certifying
 446     // Authority. Issued by C=IN, O=India PKI, CN=CCA India 2007.
 447     // Expires July 4th, 2015.
 448     {0xf5, 0x71, 0x79, 0xfa, 0xea, 0x10, 0xc5, 0x43, 0x8c, 0xb0,
 449      0xc6, 0xe1, 0xcc, 0x27, 0x7b, 0x6e, 0x0d, 0xb2, 0xff, 0x54},
 450     // C=IN, O=National Informatics Centre, CN=NIC CA 2011. Issued by
 451     // C=IN, O=India PKI, CN=CCA India 2011.
 452     // Expires March 11th 2016.
 453     {0x07, 0x7a, 0xc7, 0xde, 0x8d, 0xa5, 0x58, 0x64, 0x3a, 0x06,
 454      0xc5, 0x36, 0x9e, 0x55, 0x4f, 0xae, 0xb3, 0xdf, 0xa1, 0x66},
 455     // C=IN, O=National Informatics Centre, CN=NIC CA 2014. Issued by
 456     // C=IN, O=India PKI, CN=CCA India 2014.
 457     // Expires: March 5th, 2024.
 458     {0xe5, 0x8e, 0x31, 0x5b, 0xaa, 0xee, 0xaa, 0xc6, 0xe7, 0x2e,
 459      0xc9, 0x57, 0x36, 0x70, 0xca, 0x2f, 0x25, 0x4e, 0xc3, 0x47},
 460     // C=DE, O=Fraunhofer, OU=Fraunhofer Corporate PKI,
 461     // CN=Fraunhofer Service CA 2007.
 462     // Expires: Jun 30 2019.
 463     // No compromise, just for robustness. See
 464     // https://bugzilla.mozilla.org/show_bug.cgi?id=1076940
 465     {0x38, 0x4d, 0x0c, 0x1d, 0xc4, 0x77, 0xa7, 0xb3, 0xf8, 0x67,
 466      0x86, 0xd0, 0x18, 0x51, 0x9f, 0x58, 0x9f, 0x1e, 0x9e, 0x25},
 467   };
 468
 469   for (unsigned i = 0; i < kNumHashes; i++) {
 470     for (HashValueVector::const_iterator j = public_key_hashes.begin();
 471          j != public_key_hashes.end(); ++j) {
 472       if (j->tag == HASH_VALUE_SHA1 &&
 473           memcmp(j->data(), kHashes[i], base::kSHA1Length) == 0) {
 474         return true;
 475       }
 476     }
 477   }
 478
 479   return false;
 480 }
 481
 482 static const size_t kMaxDomainLength = 18;
 483
 484 // CheckNameConstraints verifies that every name in |dns_names| is in one of
 485 // the domains specified by |domains|. The |domains| array is terminated by an
 486 // empty string.
 487 static bool CheckNameConstraints(const std::vector<std::string>& dns_names,
 488                                  const char domains[][kMaxDomainLength]) {
 489   for (std::vector<std::string>::const_iterator i = dns_names.begin();
 490        i != dns_names.end(); ++i) {
 491     bool ok = false;
 492     url::CanonHostInfo host_info;
 493     const std::string dns_name = CanonicalizeHost(*i, &host_info);
 494     if (host_info.IsIPAddress())
 495       continue;
 496
 497     const size_t registry_len = registry_controlled_domains::GetRegistryLength(
 498         dns_name,
 499         registry_controlled_domains::EXCLUDE_UNKNOWN_REGISTRIES,
 500         registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
 501     // If the name is not in a known TLD, ignore it. This permits internal
 502     // names.
 503     if (registry_len == 0)
 504       continue;
 505
 506     for (size_t j = 0; domains[j][0]; ++j) {
 507       const size_t domain_length = strlen(domains[j]);
 508       // The DNS name must have "." + domains[j] as a suffix.
 509       if (i->size() <= (1 /* period before domain */ + domain_length))
 510         continue;
 511
 512       const char* suffix = &dns_name[i->size() - domain_length - 1];
 513       if (suffix[0] != '.')
 514         continue;
 515       if (memcmp(&suffix[1], domains[j], domain_length) != 0)
 516         continue;
 517       ok = true;
 518       break;
 519     }
 520
 521     if (!ok)
 522       return false;
 523   }
 524
 525   return true;
 526 }
 527
 528 // PublicKeyDomainLimitation contains a SHA1, SPKI hash and a pointer to an
 529 // array of fixed-length strings that contain the domains that the SPKI is
 530 // allowed to issue for.
 531 struct PublicKeyDomainLimitation {
 532   uint8_t public_key[base::kSHA1Length];
 533   const char (*domains)[kMaxDomainLength];
 534 };
 535
 536 // static
 537 bool CertVerifyProc::HasNameConstraintsViolation(
 538     const HashValueVector& public_key_hashes,
 539     const std::string& common_name,
 540     const std::vector<std::string>& dns_names,
 541     const std::vector<std::string>& ip_addrs) {
 542   static const char kDomainsANSSI[][kMaxDomainLength] = {
 543     "fr",  // France
 544     "gp",  // Guadeloupe
 545     "gf",  // Guyane
 546     "mq",  // Martinique
 547     "re",  // Réunion
 548     "yt",  // Mayotte
 549     "pm",  // Saint-Pierre et Miquelon
 550     "bl",  // Saint Barthélemy
 551     "mf",  // Saint Martin
 552     "wf",  // Wallis et Futuna
 553     "pf",  // Polynésie française
 554     "nc",  // Nouvelle Calédonie
 555     "tf",  // Terres australes et antarctiques françaises
 556     "",
 557   };
 558
 559   static const char kDomainsIndiaCCA[][kMaxDomainLength] = {
 560     "gov.in",
 561     "nic.in",
 562     "ac.in",
 563     "rbi.org.in",
 564     "bankofindia.co.in",
 565     "ncode.in",
 566     "tcs.co.in",
 567     "",
 568   };
 569
 570   static const char kDomainsTest[][kMaxDomainLength] = {
 571     "example.com",
 572     "",
 573   };
 574
 575   static const PublicKeyDomainLimitation kLimits[] = {
 576     // C=FR, ST=France, L=Paris, O=PM/SGDN, OU=DCSSI,
 577     // CN=IGC/A/emailAddress=igca@sgdn.pm.gouv.fr
 578     {
 579       {0x79, 0x23, 0xd5, 0x8d, 0x0f, 0xe0, 0x3c, 0xe6, 0xab, 0xad,
 580        0xae, 0x27, 0x1a, 0x6d, 0x94, 0xf4, 0x14, 0xd1, 0xa8, 0x73},
 581       kDomainsANSSI,
 582     },
 583     // C=IN, O=India PKI, CN=CCA India 2007
 584     // Expires: July 4th 2015.
 585     {
 586       {0xfe, 0xe3, 0x95, 0x21, 0x2d, 0x5f, 0xea, 0xfc, 0x7e, 0xdc,
 587        0xcf, 0x88, 0x3f, 0x1e, 0xc0, 0x58, 0x27, 0xd8, 0xb8, 0xe4},
 588       kDomainsIndiaCCA,
 589     },
 590     // C=IN, O=India PKI, CN=CCA India 2011
 591     // Expires: March 11 2016.
 592     {
 593       {0xf1, 0x42, 0xf6, 0xa2, 0x7d, 0x29, 0x3e, 0xa8, 0xf9, 0x64,
 594        0x52, 0x56, 0xed, 0x07, 0xa8, 0x63, 0xf2, 0xdb, 0x1c, 0xdf},
 595       kDomainsIndiaCCA,
 596     },
 597     // C=IN, O=India PKI, CN=CCA India 2014
 598     // Expires: March 5 2024.
 599     {
 600       {0x36, 0x8c, 0x4a, 0x1e, 0x2d, 0xb7, 0x81, 0xe8, 0x6b, 0xed,
 601        0x5a, 0x0a, 0x42, 0xb8, 0xc5, 0xcf, 0x6d, 0xb3, 0x57, 0xe1},
 602       kDomainsIndiaCCA,
 603     },
 604     // Not a real certificate - just for testing. This is the SPKI hash of
 605     // the keys used in net/data/ssl/certificates/name_constraint_*.crt.
 606     {
 607       {0x61, 0xec, 0x82, 0x8b, 0xdb, 0x5c, 0x78, 0x2a, 0x8f, 0xcc,
 608        0x4f, 0x0f, 0x14, 0xbb, 0x85, 0x31, 0x93, 0x9f, 0xf7, 0x3d},
 609       kDomainsTest,
 610     },
 611   };
 612
 613   for (unsigned i = 0; i < arraysize(kLimits); ++i) {
 614     for (HashValueVector::const_iterator j = public_key_hashes.begin();
 615          j != public_key_hashes.end(); ++j) {
 616       if (j->tag == HASH_VALUE_SHA1 &&
 617           memcmp(j->data(), kLimits[i].public_key, base::kSHA1Length) == 0) {
 618         if (dns_names.empty() && ip_addrs.empty()) {
 619           std::vector<std::string> dns_names;
 620           dns_names.push_back(common_name);
 621           if (!CheckNameConstraints(dns_names, kLimits[i].domains))
 622             return true;
 623         } else {
 624           if (!CheckNameConstraints(dns_names, kLimits[i].domains))
 625             return true;
 626         }
 627       }
 628     }
 629   }
 630
 631   return false;
 632 }
 633
 634 // static
 635 bool CertVerifyProc::HasTooLongValidity(const X509Certificate& cert) {
 636   const base::Time& start = cert.valid_start();
 637   const base::Time& expiry = cert.valid_expiry();
 638   if (start.is_max() || start.is_null() || expiry.is_max() ||
 639       expiry.is_null() || start > expiry) {
 640     return true;
 641   }
 642
 643   base::Time::Exploded exploded_start;
 644   base::Time::Exploded exploded_expiry;
 645   cert.valid_start().UTCExplode(&exploded_start);
 646   cert.valid_expiry().UTCExplode(&exploded_expiry);
 647
 648   if (exploded_expiry.year - exploded_start.year > 10)
 649     return true;
 650
 651   int month_diff = (exploded_expiry.year - exploded_start.year) * 12 +
 652                    (exploded_expiry.month - exploded_start.month);
 653
 654   // Add any remainder as a full month.
 655   if (exploded_expiry.day_of_month > exploded_start.day_of_month)
 656     ++month_diff;
 657
 658   static const base::Time time_2012_07_01 =
 659       base::Time::FromUTCExploded({2012, 7, 0, 1, 0, 0, 0, 0});
 660   static const base::Time time_2015_04_01 =
 661       base::Time::FromUTCExploded({2015, 4, 0, 1, 0, 0, 0, 0});
 662   static const base::Time time_2019_07_01 =
 663       base::Time::FromUTCExploded({2019, 7, 0, 1, 0, 0, 0, 0});
 664
 665   // For certificates issued before the BRs took effect.
 666   if (start < time_2012_07_01 && (month_diff > 120 || expiry > time_2019_07_01))
 667     return true;
 668
 669   // For certificates issued after 1 July 2012: 60 months.
 670   if (start >= time_2012_07_01 && month_diff > 60)
 671     return true;
 672
 673   // For certificates issued after 1 April 2015: 39 months.
 674   if (start >= time_2015_04_01 && month_diff > 39)
 675     return true;
 676
 677   return false;
 678 }
 679
 680 }  // namespace net