net/cert/x509_cert_types.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/x509_cert_types.h"
   6
   7 #include <cstdlib>
   8 #include <cstring>
   9
  10 #include "base/logging.h"
  11 #include "base/strings/string_number_conversions.h"
  12 #include "base/strings/string_piece.h"
  13 #include "base/time/time.h"
  14 #include "net/cert/x509_certificate.h"
  15
  16 namespace net {
  17
  18 namespace {
  19
  20 // Helper for ParseCertificateDate. |*field| must contain at least
  21 // |field_len| characters. |*field| will be advanced by |field_len| on exit.
  22 // |*ok| is set to false if there is an error in parsing the number, but left
  23 // untouched otherwise. Returns the parsed integer.
  24 int ParseIntAndAdvance(const char** field, size_t field_len, bool* ok) {
  25   int result = 0;
  26   *ok &= base::StringToInt(base::StringPiece(*field, field_len), &result);
  27   *field += field_len;
  28   return result;
  29 }
  30
  31 }
  32
  33 CertPrincipal::CertPrincipal() {
  34 }
  35
  36 CertPrincipal::CertPrincipal(const std::string& name) : common_name(name) {}
  37
  38 CertPrincipal::~CertPrincipal() {
  39 }
  40
  41 std::string CertPrincipal::GetDisplayName() const {
  42   if (!common_name.empty())
  43     return common_name;
  44   if (!organization_names.empty())
  45     return organization_names[0];
  46   if (!organization_unit_names.empty())
  47     return organization_unit_names[0];
  48
  49   return std::string();
  50 }
  51
  52 bool ParseCertificateDate(const base::StringPiece& raw_date,
  53                           CertDateFormat format,
  54                           base::Time* time) {
  55   size_t year_length = format == CERT_DATE_FORMAT_UTC_TIME ? 2 : 4;
  56
  57   if (raw_date.length() < 11 + year_length)
  58     return false;
  59
  60   const char* field = raw_date.data();
  61   bool valid = true;
  62   base::Time::Exploded exploded = {0};
  63
  64   exploded.year =         ParseIntAndAdvance(&field, year_length, &valid);
  65   exploded.month =        ParseIntAndAdvance(&field, 2, &valid);
  66   exploded.day_of_month = ParseIntAndAdvance(&field, 2, &valid);
  67   exploded.hour =         ParseIntAndAdvance(&field, 2, &valid);
  68   exploded.minute =       ParseIntAndAdvance(&field, 2, &valid);
  69   exploded.second =       ParseIntAndAdvance(&field, 2, &valid);
  70   if (valid && year_length == 2)
  71     exploded.year += exploded.year < 50 ? 2000 : 1900;
  72
  73   valid &= exploded.HasValidValues();
  74
  75   if (!valid)
  76     return false;
  77
  78   *time = base::Time::FromUTCExploded(exploded);
  79   return true;
  80 }
  81
  82 }  // namespace net