src/chrome/browser/ssl/ssl_error_info.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 "chrome/browser/ssl/ssl_error_info.h"
   6
   7 #include "base/i18n/time_formatting.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "chrome/grit/chromium_strings.h"
  11 #include "chrome/grit/generated_resources.h"
  12 #include "content/public/browser/cert_store.h"
  13 #include "net/base/escape.h"
  14 #include "net/base/net_errors.h"
  15 #include "net/cert/cert_status_flags.h"
  16 #include "net/ssl/ssl_info.h"
  17 #include "ui/base/l10n/l10n_util.h"
  18 #include "url/gurl.h"
  19
  20 using base::UTF8ToUTF16;
  21
  22 SSLErrorInfo::SSLErrorInfo(const base::string16& details,
  23                            const base::string16& short_description)
  24     : details_(details),
  25       short_description_(short_description) {
  26 }
  27
  28 // static
  29 SSLErrorInfo SSLErrorInfo::CreateError(ErrorType error_type,
  30                                        net::X509Certificate* cert,
  31                                        const GURL& request_url) {
  32   base::string16 details, short_description;
  33   switch (error_type) {
  34     case CERT_COMMON_NAME_INVALID: {
  35       // If the certificate contains multiple DNS names, we choose the most
  36       // representative one -- either the DNS name that's also in the subject
  37       // field, or the first one.  If this heuristic turns out to be
  38       // inadequate, we can consider choosing the DNS name that is the
  39       // "closest match" to the host name in the request URL, or listing all
  40       // the DNS names with an HTML <ul>.
  41       std::vector<std::string> dns_names;
  42       cert->GetDNSNames(&dns_names);
  43       DCHECK(!dns_names.empty());
  44       size_t i = 0;
  45       for (; i < dns_names.size(); ++i) {
  46         if (dns_names[i] == cert->subject().common_name)
  47           break;
  48       }
  49       if (i == dns_names.size())
  50         i = 0;
  51       details =
  52           l10n_util::GetStringFUTF16(IDS_CERT_ERROR_COMMON_NAME_INVALID_DETAILS,
  53                                      UTF8ToUTF16(request_url.host()),
  54                                      net::EscapeForHTML(
  55                                          UTF8ToUTF16(dns_names[i])));
  56       short_description = l10n_util::GetStringUTF16(
  57           IDS_CERT_ERROR_COMMON_NAME_INVALID_DESCRIPTION);
  58       break;
  59     }
  60     case CERT_DATE_INVALID:
  61       if (cert->HasExpired()) {
  62         details = l10n_util::GetStringFUTF16(
  63             IDS_CERT_ERROR_EXPIRED_DETAILS,
  64             UTF8ToUTF16(request_url.host()),
  65             base::IntToString16(
  66                 (base::Time::Now() - cert->valid_expiry()).InDays()),
  67             base::TimeFormatFriendlyDate(base::Time::Now()));
  68         short_description =
  69             l10n_util::GetStringUTF16(IDS_CERT_ERROR_EXPIRED_DESCRIPTION);
  70       } else if (base::Time::Now() < cert->valid_start()) {
  71         details = l10n_util::GetStringFUTF16(
  72             IDS_CERT_ERROR_NOT_YET_VALID_DETAILS,
  73             UTF8ToUTF16(request_url.host()),
  74             base::IntToString16(
  75                 (cert->valid_start() - base::Time::Now()).InDays()));
  76         short_description =
  77             l10n_util::GetStringUTF16(IDS_CERT_ERROR_NOT_YET_VALID_DESCRIPTION);
  78       } else {
  79         // Two possibilities: (1) an intermediate or root certificate has
  80         // expired, or (2) the certificate has become valid since the error
  81         // occurred. Since (1) is more likely, assume that's the case.
  82         details = l10n_util::GetStringFUTF16(
  83             IDS_CERT_ERROR_CHAIN_EXPIRED_DETAILS,
  84             UTF8ToUTF16(request_url.host()),
  85             base::TimeFormatFriendlyDate(base::Time::Now()));
  86         short_description =
  87             l10n_util::GetStringUTF16(IDS_CERT_ERROR_CHAIN_EXPIRED_DESCRIPTION);
  88       }
  89       break;
  90     case CERT_AUTHORITY_INVALID:
  91       details = l10n_util::GetStringFUTF16(
  92           IDS_CERT_ERROR_AUTHORITY_INVALID_DETAILS,
  93           UTF8ToUTF16(request_url.host()));
  94       short_description = l10n_util::GetStringUTF16(
  95           IDS_CERT_ERROR_AUTHORITY_INVALID_DESCRIPTION);
  96       break;
  97     case CERT_CONTAINS_ERRORS:
  98       details = l10n_util::GetStringFUTF16(
  99           IDS_CERT_ERROR_CONTAINS_ERRORS_DETAILS,
 100           UTF8ToUTF16(request_url.host()));
 101       short_description =
 102           l10n_util::GetStringUTF16(IDS_CERT_ERROR_CONTAINS_ERRORS_DESCRIPTION);
 103       break;
 104     case CERT_NO_REVOCATION_MECHANISM:
 105       details = l10n_util::GetStringUTF16(
 106           IDS_CERT_ERROR_NO_REVOCATION_MECHANISM_DETAILS);
 107       short_description = l10n_util::GetStringUTF16(
 108           IDS_CERT_ERROR_NO_REVOCATION_MECHANISM_DESCRIPTION);
 109       break;
 110     case CERT_REVOKED:
 111       details = l10n_util::GetStringFUTF16(IDS_CERT_ERROR_REVOKED_CERT_DETAILS,
 112                                            UTF8ToUTF16(request_url.host()));
 113       short_description =
 114           l10n_util::GetStringUTF16(IDS_CERT_ERROR_REVOKED_CERT_DESCRIPTION);
 115       break;
 116     case CERT_INVALID:
 117       details = l10n_util::GetStringFUTF16(
 118           IDS_CERT_ERROR_INVALID_CERT_DETAILS,
 119           UTF8ToUTF16(request_url.host()));
 120       short_description =
 121           l10n_util::GetStringUTF16(IDS_CERT_ERROR_INVALID_CERT_DESCRIPTION);
 122       break;
 123     case CERT_WEAK_SIGNATURE_ALGORITHM:
 124       details = l10n_util::GetStringFUTF16(
 125           IDS_CERT_ERROR_WEAK_SIGNATURE_ALGORITHM_DETAILS,
 126           UTF8ToUTF16(request_url.host()));
 127       short_description = l10n_util::GetStringUTF16(
 128           IDS_CERT_ERROR_WEAK_SIGNATURE_ALGORITHM_DESCRIPTION);
 129       break;
 130     case CERT_WEAK_KEY:
 131       details = l10n_util::GetStringFUTF16(
 132           IDS_CERT_ERROR_WEAK_KEY_DETAILS, UTF8ToUTF16(request_url.host()));
 133       short_description = l10n_util::GetStringUTF16(
 134           IDS_CERT_ERROR_WEAK_KEY_DESCRIPTION);
 135       break;
 136     case CERT_WEAK_KEY_DH:
 137       details = l10n_util::GetStringFUTF16(
 138           IDS_CERT_ERROR_WEAK_KEY_DETAILS, UTF8ToUTF16(request_url.host()));
 139       short_description = l10n_util::GetStringUTF16(
 140           IDS_CERT_ERROR_WEAK_KEY_DESCRIPTION);
 141     case CERT_NAME_CONSTRAINT_VIOLATION:
 142       details = l10n_util::GetStringFUTF16(
 143           IDS_CERT_ERROR_NAME_CONSTRAINT_VIOLATION_DETAILS,
 144           UTF8ToUTF16(request_url.host()));
 145       short_description = l10n_util::GetStringUTF16(
 146           IDS_CERT_ERROR_NAME_CONSTRAINT_VIOLATION_DESCRIPTION);
 147       break;
 148     case CERT_PINNED_KEY_MISSING:
 149       details = l10n_util::GetStringUTF16(
 150           IDS_ERRORPAGES_SUMMARY_PINNING_FAILURE);
 151       short_description = l10n_util::GetStringUTF16(
 152           IDS_ERRORPAGES_DETAILS_PINNING_FAILURE);
 153       break;
 154     case UNKNOWN:
 155       details = l10n_util::GetStringUTF16(IDS_CERT_ERROR_UNKNOWN_ERROR_DETAILS);
 156       short_description =
 157           l10n_util::GetStringUTF16(IDS_CERT_ERROR_UNKNOWN_ERROR_DESCRIPTION);
 158       break;
 159     case CERT_UNABLE_TO_CHECK_REVOCATION:  // Deprecated.
 160     default:
 161       NOTREACHED();
 162   }
 163   return SSLErrorInfo(details, short_description);
 164 }
 165
 166 SSLErrorInfo::~SSLErrorInfo() {
 167 }
 168
 169 // static
 170 SSLErrorInfo::ErrorType SSLErrorInfo::NetErrorToErrorType(int net_error) {
 171   switch (net_error) {
 172     case net::ERR_CERT_COMMON_NAME_INVALID:
 173       return CERT_COMMON_NAME_INVALID;
 174     case net::ERR_CERT_DATE_INVALID:
 175       return CERT_DATE_INVALID;
 176     case net::ERR_CERT_AUTHORITY_INVALID:
 177       return CERT_AUTHORITY_INVALID;
 178     case net::ERR_CERT_CONTAINS_ERRORS:
 179       return CERT_CONTAINS_ERRORS;
 180     case net::ERR_CERT_NO_REVOCATION_MECHANISM:
 181       return CERT_NO_REVOCATION_MECHANISM;
 182     case net::ERR_CERT_UNABLE_TO_CHECK_REVOCATION:
 183       return CERT_UNABLE_TO_CHECK_REVOCATION;
 184     case net::ERR_CERT_REVOKED:
 185       return CERT_REVOKED;
 186     case net::ERR_CERT_INVALID:
 187       return CERT_INVALID;
 188     case net::ERR_CERT_WEAK_SIGNATURE_ALGORITHM:
 189       return CERT_WEAK_SIGNATURE_ALGORITHM;
 190     case net::ERR_CERT_WEAK_KEY:
 191       return CERT_WEAK_KEY;
 192     case net::ERR_CERT_NAME_CONSTRAINT_VIOLATION:
 193       return CERT_NAME_CONSTRAINT_VIOLATION;
 194     case net::ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY:
 195       return CERT_WEAK_KEY_DH;
 196     case net::ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN:
 197       return CERT_PINNED_KEY_MISSING;
 198     default:
 199       NOTREACHED();
 200       return UNKNOWN;
 201     }
 202 }
 203
 204 // static
 205 int SSLErrorInfo::GetErrorsForCertStatus(int cert_id,
 206                                          net::CertStatus cert_status,
 207                                          const GURL& url,
 208                                          std::vector<SSLErrorInfo>* errors) {
 209   const net::CertStatus kErrorFlags[] = {
 210     net::CERT_STATUS_COMMON_NAME_INVALID,
 211     net::CERT_STATUS_DATE_INVALID,
 212     net::CERT_STATUS_AUTHORITY_INVALID,
 213     net::CERT_STATUS_NO_REVOCATION_MECHANISM,
 214     net::CERT_STATUS_UNABLE_TO_CHECK_REVOCATION,
 215     net::CERT_STATUS_REVOKED,
 216     net::CERT_STATUS_INVALID,
 217     net::CERT_STATUS_WEAK_SIGNATURE_ALGORITHM,
 218     net::CERT_STATUS_WEAK_KEY,
 219     net::CERT_STATUS_NAME_CONSTRAINT_VIOLATION,
 220   };
 221
 222   const ErrorType kErrorTypes[] = {
 223     CERT_COMMON_NAME_INVALID,
 224     CERT_DATE_INVALID,
 225     CERT_AUTHORITY_INVALID,
 226     CERT_NO_REVOCATION_MECHANISM,
 227     CERT_UNABLE_TO_CHECK_REVOCATION,
 228     CERT_REVOKED,
 229     CERT_INVALID,
 230     CERT_WEAK_SIGNATURE_ALGORITHM,
 231     CERT_WEAK_KEY,
 232     CERT_NAME_CONSTRAINT_VIOLATION,
 233   };
 234   DCHECK(arraysize(kErrorFlags) == arraysize(kErrorTypes));
 235
 236   scoped_refptr<net::X509Certificate> cert = NULL;
 237   int count = 0;
 238   for (size_t i = 0; i < arraysize(kErrorFlags); ++i) {
 239     if (cert_status & kErrorFlags[i]) {
 240       count++;
 241       if (!cert.get()) {
 242         bool r = content::CertStore::GetInstance()->RetrieveCert(
 243             cert_id, &cert);
 244         DCHECK(r);
 245       }
 246       if (errors)
 247         errors->push_back(
 248             SSLErrorInfo::CreateError(kErrorTypes[i], cert.get(), url));
 249     }
 250   }
 251   return count;
 252 }