net/ssl/ssl_connection_status_flags.h

   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 #ifndef NET_SSL_SSL_CONNECTION_STATUS_FLAGS_H_
   6 #define NET_SSL_SSL_CONNECTION_STATUS_FLAGS_H_
   7
   8 namespace net {
   9
  10 // Status flags for SSLInfo::connection_status.
  11 enum {
  12   // The lower 16 bits are reserved for the TLS ciphersuite id.
  13   SSL_CONNECTION_CIPHERSUITE_SHIFT = 0,
  14   SSL_CONNECTION_CIPHERSUITE_MASK = 0xffff,
  15
  16   // The next two bits are reserved for the compression used.
  17   SSL_CONNECTION_COMPRESSION_SHIFT = 16,
  18   SSL_CONNECTION_COMPRESSION_MASK = 3,
  19
  20   // We fell back to an older protocol version for this connection.
  21   SSL_CONNECTION_VERSION_FALLBACK = 1 << 18,
  22
  23   // The server doesn't support the renegotiation_info extension. If this bit
  24   // is not set then either the extension isn't supported, or we don't have any
  25   // knowledge either way. (The latter case will occur when we use an SSL
  26   // library that doesn't report it, like SChannel.)
  27   SSL_CONNECTION_NO_RENEGOTIATION_EXTENSION = 1 << 19,
  28
  29   // The next three bits are reserved for the SSL version.
  30   SSL_CONNECTION_VERSION_SHIFT = 20,
  31   SSL_CONNECTION_VERSION_MASK = 7,
  32
  33   // 1 << 31 (the sign bit) is reserved so that the SSL connection status will
  34   // never be negative.
  35 };
  36
  37 // NOTE: the SSL version enum constants must be between 0 and
  38 // SSL_CONNECTION_VERSION_MASK, inclusive.
  39 enum {
  40   SSL_CONNECTION_VERSION_UNKNOWN = 0,  // Unknown SSL version.
  41   SSL_CONNECTION_VERSION_SSL2 = 1,
  42   SSL_CONNECTION_VERSION_SSL3 = 2,
  43   SSL_CONNECTION_VERSION_TLS1 = 3,
  44   SSL_CONNECTION_VERSION_TLS1_1 = 4,
  45   SSL_CONNECTION_VERSION_TLS1_2 = 5,
  46   SSL_CONNECTION_VERSION_MAX,
  47 };
  48 COMPILE_ASSERT(SSL_CONNECTION_VERSION_MAX - 1 <= SSL_CONNECTION_VERSION_MASK,
  49                SSL_CONNECTION_VERSION_MASK_too_small);
  50
  51 inline int SSLConnectionStatusToCipherSuite(int connection_status) {
  52   return (connection_status >> SSL_CONNECTION_CIPHERSUITE_SHIFT) &
  53          SSL_CONNECTION_CIPHERSUITE_MASK;
  54 }
  55
  56 inline int SSLConnectionStatusToVersion(int connection_status) {
  57   return (connection_status >> SSL_CONNECTION_VERSION_SHIFT) &
  58          SSL_CONNECTION_VERSION_MASK;
  59 }
  60
  61 }  // namespace net
  62
  63 #endif  // NET_SSL_SSL_CONNECTION_STATUS_FLAGS_H_