ceph/src/boost/libs/asio/include/boost/asio/ssl/impl/rfc2818_verification.ipp

   1 //
   2 // ssl/impl/rfc2818_verification.ipp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_SSL_IMPL_RFC2818_VERIFICATION_IPP
  12 #define BOOST_ASIO_SSL_IMPL_RFC2818_VERIFICATION_IPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if !defined(BOOST_ASIO_ENABLE_OLD_SSL)
  21 # include <cctype>
  22 # include <cstring>
  23 # include <boost/asio/ip/address.hpp>
  24 # include <boost/asio/ssl/rfc2818_verification.hpp>
  25 # include <boost/asio/ssl/detail/openssl_types.hpp>
  26 #endif // !defined(BOOST_ASIO_ENABLE_OLD_SSL)
  27
  28 #include <boost/asio/detail/push_options.hpp>
  29
  30 namespace boost {
  31 namespace asio {
  32 namespace ssl {
  33
  34 #if !defined(BOOST_ASIO_ENABLE_OLD_SSL)
  35
  36 bool rfc2818_verification::operator()(
  37     bool preverified, verify_context& ctx) const
  38 {
  39   using namespace std; // For memcmp.
  40
  41   // Don't bother looking at certificates that have failed pre-verification.
  42   if (!preverified)
  43     return false;
  44
  45   // We're only interested in checking the certificate at the end of the chain.
  46   int depth = X509_STORE_CTX_get_error_depth(ctx.native_handle());
  47   if (depth > 0)
  48     return true;
  49
  50   // Try converting the host name to an address. If it is an address then we
  51   // need to look for an IP address in the certificate rather than a host name.
  52   boost::system::error_code ec;
  53   ip::address address = ip::address::from_string(host_, ec);
  54   bool is_address = !ec;
  55
  56   X509* cert = X509_STORE_CTX_get_current_cert(ctx.native_handle());
  57
  58   // Go through the alternate names in the certificate looking for matching DNS
  59   // or IP address entries.
  60   GENERAL_NAMES* gens = static_cast<GENERAL_NAMES*>(
  61       X509_get_ext_d2i(cert, NID_subject_alt_name, 0, 0));
  62   for (int i = 0; i < sk_GENERAL_NAME_num(gens); ++i)
  63   {
  64     GENERAL_NAME* gen = sk_GENERAL_NAME_value(gens, i);
  65     if (gen->type == GEN_DNS && !is_address)
  66     {
  67       ASN1_IA5STRING* domain = gen->d.dNSName;
  68       if (domain->type == V_ASN1_IA5STRING && domain->data && domain->length)
  69       {
  70         const char* pattern = reinterpret_cast<const char*>(domain->data);
  71         std::size_t pattern_length = domain->length;
  72         if (match_pattern(pattern, pattern_length, host_.c_str()))
  73         {
  74           GENERAL_NAMES_free(gens);
  75           return true;
  76         }
  77       }
  78     }
  79     else if (gen->type == GEN_IPADD && is_address)
  80     {
  81       ASN1_OCTET_STRING* ip_address = gen->d.iPAddress;
  82       if (ip_address->type == V_ASN1_OCTET_STRING && ip_address->data)
  83       {
  84         if (address.is_v4() && ip_address->length == 4)
  85         {
  86           ip::address_v4::bytes_type bytes = address.to_v4().to_bytes();
  87           if (memcmp(bytes.data(), ip_address->data, 4) == 0)
  88           {
  89             GENERAL_NAMES_free(gens);
  90             return true;
  91           }
  92         }
  93         else if (address.is_v6() && ip_address->length == 16)
  94         {
  95           ip::address_v6::bytes_type bytes = address.to_v6().to_bytes();
  96           if (memcmp(bytes.data(), ip_address->data, 16) == 0)
  97           {
  98             GENERAL_NAMES_free(gens);
  99             return true;
 100           }
 101         }
 102       }
 103     }
 104   }
 105   GENERAL_NAMES_free(gens);
 106
 107   // No match in the alternate names, so try the common names. We should only
 108   // use the "most specific" common name, which is the last one in the list.
 109   X509_NAME* name = X509_get_subject_name(cert);
 110   int i = -1;
 111   ASN1_STRING* common_name = 0;
 112   while ((i = X509_NAME_get_index_by_NID(name, NID_commonName, i)) >= 0)
 113   {
 114     X509_NAME_ENTRY* name_entry = X509_NAME_get_entry(name, i);
 115     common_name = X509_NAME_ENTRY_get_data(name_entry);
 116   }
 117   if (common_name && common_name->data && common_name->length)
 118   {
 119     const char* pattern = reinterpret_cast<const char*>(common_name->data);
 120     std::size_t pattern_length = common_name->length;
 121     if (match_pattern(pattern, pattern_length, host_.c_str()))
 122       return true;
 123   }
 124
 125   return false;
 126 }
 127
 128 bool rfc2818_verification::match_pattern(const char* pattern,
 129     std::size_t pattern_length, const char* host)
 130 {
 131   using namespace std; // For tolower.
 132
 133   const char* p = pattern;
 134   const char* p_end = p + pattern_length;
 135   const char* h = host;
 136
 137   while (p != p_end && *h)
 138   {
 139     if (*p == '*')
 140     {
 141       ++p;
 142       while (*h && *h != '.')
 143         if (match_pattern(p, p_end - p, h++))
 144           return true;
 145     }
 146     else if (tolower(*p) == tolower(*h))
 147     {
 148       ++p;
 149       ++h;
 150     }
 151     else
 152     {
 153       return false;
 154     }
 155   }
 156
 157   return p == p_end && !*h;
 158 }
 159
 160 #endif // !defined(BOOST_ASIO_ENABLE_OLD_SSL)
 161
 162 } // namespace ssl
 163 } // namespace asio
 164 } // namespace boost
 165
 166 #include <boost/asio/detail/pop_options.hpp>
 167
 168 #endif // BOOST_ASIO_SSL_IMPL_RFC2818_VERIFICATION_IPP