net/ssl/openssl_ssl_util.cc

   1 // Copyright 2014 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/ssl/openssl_ssl_util.h"
   6
   7 #include <errno.h>
   8
   9 #include <openssl/err.h>
  10 #include <openssl/ssl.h>
  11
  12 #include "base/bind.h"
  13 #include "base/lazy_instance.h"
  14 #include "base/location.h"
  15 #include "base/logging.h"
  16 #include "base/values.h"
  17 #include "crypto/openssl_util.h"
  18 #include "net/base/net_errors.h"
  19
  20 namespace net {
  21
  22 SslSetClearMask::SslSetClearMask()
  23     : set_mask(0),
  24       clear_mask(0) {
  25 }
  26
  27 void SslSetClearMask::ConfigureFlag(long flag, bool state) {
  28   (state ? set_mask : clear_mask) |= flag;
  29   // Make sure we haven't got any intersection in the set & clear options.
  30   DCHECK_EQ(0, set_mask & clear_mask) << flag << ":" << state;
  31 }
  32
  33 namespace {
  34
  35 class OpenSSLNetErrorLibSingleton {
  36  public:
  37   OpenSSLNetErrorLibSingleton() {
  38     crypto::EnsureOpenSSLInit();
  39
  40     // Allocate a new error library value for inserting net errors into
  41     // OpenSSL. This does not register any ERR_STRING_DATA for the errors, so
  42     // stringifying error codes through OpenSSL will return NULL.
  43     net_error_lib_ = ERR_get_next_error_library();
  44   }
  45
  46   int net_error_lib() const { return net_error_lib_; }
  47
  48  private:
  49   int net_error_lib_;
  50 };
  51
  52 base::LazyInstance<OpenSSLNetErrorLibSingleton>::Leaky g_openssl_net_error_lib =
  53     LAZY_INSTANCE_INITIALIZER;
  54
  55 int OpenSSLNetErrorLib() {
  56   return g_openssl_net_error_lib.Get().net_error_lib();
  57 }
  58
  59 int MapOpenSSLErrorSSL(uint32_t error_code) {
  60   DCHECK_EQ(ERR_LIB_SSL, ERR_GET_LIB(error_code));
  61
  62   DVLOG(1) << "OpenSSL SSL error, reason: " << ERR_GET_REASON(error_code)
  63            << ", name: " << ERR_error_string(error_code, NULL);
  64   switch (ERR_GET_REASON(error_code)) {
  65     case SSL_R_READ_TIMEOUT_EXPIRED:
  66       return ERR_TIMED_OUT;
  67     case SSL_R_UNKNOWN_CERTIFICATE_TYPE:
  68     case SSL_R_UNKNOWN_CIPHER_TYPE:
  69     case SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE:
  70     case SSL_R_UNKNOWN_SSL_VERSION:
  71       return ERR_NOT_IMPLEMENTED;
  72     case SSL_R_UNSUPPORTED_SSL_VERSION:
  73     case SSL_R_NO_CIPHER_MATCH:
  74     case SSL_R_NO_SHARED_CIPHER:
  75     case SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY:
  76     case SSL_R_TLSV1_ALERT_PROTOCOL_VERSION:
  77     case SSL_R_UNSUPPORTED_PROTOCOL:
  78       return ERR_SSL_VERSION_OR_CIPHER_MISMATCH;
  79     case SSL_R_SSLV3_ALERT_BAD_CERTIFICATE:
  80     case SSL_R_SSLV3_ALERT_UNSUPPORTED_CERTIFICATE:
  81     case SSL_R_SSLV3_ALERT_CERTIFICATE_REVOKED:
  82     case SSL_R_SSLV3_ALERT_CERTIFICATE_EXPIRED:
  83     case SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN:
  84     case SSL_R_TLSV1_ALERT_ACCESS_DENIED:
  85     case SSL_R_TLSV1_ALERT_UNKNOWN_CA:
  86       return ERR_BAD_SSL_CLIENT_AUTH_CERT;
  87     case SSL_R_SSLV3_ALERT_DECOMPRESSION_FAILURE:
  88       return ERR_SSL_DECOMPRESSION_FAILURE_ALERT;
  89     case SSL_R_SSLV3_ALERT_BAD_RECORD_MAC:
  90       return ERR_SSL_BAD_RECORD_MAC_ALERT;
  91     case SSL_R_TLSV1_ALERT_DECRYPT_ERROR:
  92       return ERR_SSL_DECRYPT_ERROR_ALERT;
  93     case SSL_R_TLSV1_UNRECOGNIZED_NAME:
  94       return ERR_SSL_UNRECOGNIZED_NAME_ALERT;
  95     case SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED:
  96       return ERR_SSL_UNSAFE_NEGOTIATION;
  97     case SSL_R_BAD_DH_P_LENGTH:
  98       return ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY;
  99     // SSL_R_UNKNOWN_PROTOCOL is reported if premature application data is
 100     // received (see http://crbug.com/42538), and also if all the protocol
 101     // versions supported by the server were disabled in this socket instance.
 102     // Mapped to ERR_SSL_PROTOCOL_ERROR for compatibility with other SSL sockets
 103     // in the former scenario.
 104     case SSL_R_UNKNOWN_PROTOCOL:
 105     case SSL_R_SSL_HANDSHAKE_FAILURE:
 106     case SSL_R_DECRYPTION_FAILED:
 107     case SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC:
 108     case SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG:
 109     case SSL_R_DIGEST_CHECK_FAILED:
 110     case SSL_R_ENCRYPTED_LENGTH_TOO_LONG:
 111     case SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST:
 112     case SSL_R_EXCESSIVE_MESSAGE_SIZE:
 113     case SSL_R_EXTRA_DATA_IN_MESSAGE:
 114     case SSL_R_GOT_A_FIN_BEFORE_A_CCS:
 115     case SSL_R_INVALID_COMMAND:
 116     case SSL_R_INVALID_TICKET_KEYS_LENGTH:
 117     // SSL_do_handshake reports this error when the server responds to a
 118     // ClientHello with a fatal close_notify alert.
 119     case SSL_R_SSLV3_ALERT_CLOSE_NOTIFY:
 120     case SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE:
 121     case SSL_R_SSLV3_ALERT_NO_CERTIFICATE:
 122     case SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER:
 123     case SSL_R_TLSV1_ALERT_DECODE_ERROR:
 124     case SSL_R_TLSV1_ALERT_DECRYPTION_FAILED:
 125     case SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION:
 126     case SSL_R_TLSV1_ALERT_INTERNAL_ERROR:
 127     case SSL_R_TLSV1_ALERT_NO_RENEGOTIATION:
 128     case SSL_R_TLSV1_ALERT_RECORD_OVERFLOW:
 129     case SSL_R_TLSV1_ALERT_USER_CANCELLED:
 130       return ERR_SSL_PROTOCOL_ERROR;
 131     case SSL_R_CERTIFICATE_VERIFY_FAILED:
 132       // The only way that the certificate verify callback can fail is if
 133       // the leaf certificate changed during a renegotiation.
 134       return ERR_SSL_SERVER_CERT_CHANGED;
 135     case SSL_R_TLSV1_ALERT_INAPPROPRIATE_FALLBACK:
 136       return ERR_SSL_INAPPROPRIATE_FALLBACK;
 137     // SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE may be returned from the server after
 138     // receiving ClientHello if there's no common supported cipher. Map that
 139     // specific case to ERR_SSL_VERSION_OR_CIPHER_MISMATCH to match the NSS
 140     // implementation. See https://goo.gl/oMtZW and https://crbug.com/446505.
 141     case SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE: {
 142       uint32_t previous = ERR_peek_error();
 143       if (previous != 0 && ERR_GET_LIB(previous) == ERR_LIB_SSL &&
 144           ERR_GET_REASON(previous) == SSL_R_HANDSHAKE_FAILURE_ON_CLIENT_HELLO) {
 145         return ERR_SSL_VERSION_OR_CIPHER_MISMATCH;
 146       }
 147       return ERR_SSL_PROTOCOL_ERROR;
 148     }
 149     default:
 150       LOG(WARNING) << "Unmapped error reason: " << ERR_GET_REASON(error_code);
 151       return ERR_SSL_PROTOCOL_ERROR;
 152   }
 153 }
 154
 155 scoped_ptr<base::Value> NetLogOpenSSLErrorCallback(
 156     int net_error,
 157     int ssl_error,
 158     const OpenSSLErrorInfo& error_info,
 159     NetLogCaptureMode /* capture_mode */) {
 160   scoped_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
 161   dict->SetInteger("net_error", net_error);
 162   dict->SetInteger("ssl_error", ssl_error);
 163   if (error_info.error_code != 0) {
 164     dict->SetInteger("error_lib", ERR_GET_LIB(error_info.error_code));
 165     dict->SetInteger("error_reason", ERR_GET_REASON(error_info.error_code));
 166   }
 167   if (error_info.file != NULL)
 168     dict->SetString("file", error_info.file);
 169   if (error_info.line != 0)
 170     dict->SetInteger("line", error_info.line);
 171   return dict.Pass();
 172 }
 173
 174 }  // namespace
 175
 176 void OpenSSLPutNetError(const tracked_objects::Location& location, int err) {
 177   // Net error codes are negative. Encode them as positive numbers.
 178   err = -err;
 179   if (err < 0 || err > 0xfff) {
 180     // OpenSSL reserves 12 bits for the reason code.
 181     NOTREACHED();
 182     err = ERR_INVALID_ARGUMENT;
 183   }
 184   ERR_put_error(OpenSSLNetErrorLib(), 0, err,
 185                 location.file_name(), location.line_number());
 186 }
 187
 188 int MapOpenSSLError(int err, const crypto::OpenSSLErrStackTracer& tracer) {
 189   OpenSSLErrorInfo error_info;
 190   return MapOpenSSLErrorWithDetails(err, tracer, &error_info);
 191 }
 192
 193 int MapOpenSSLErrorWithDetails(int err,
 194                                const crypto::OpenSSLErrStackTracer& tracer,
 195                                OpenSSLErrorInfo* out_error_info) {
 196   *out_error_info = OpenSSLErrorInfo();
 197
 198   switch (err) {
 199     case SSL_ERROR_WANT_READ:
 200     case SSL_ERROR_WANT_WRITE:
 201       return ERR_IO_PENDING;
 202     case SSL_ERROR_SYSCALL:
 203       LOG(ERROR) << "OpenSSL SYSCALL error, earliest error code in "
 204                     "error queue: " << ERR_peek_error() << ", errno: "
 205                  << errno;
 206       return ERR_FAILED;
 207     case SSL_ERROR_SSL:
 208       // Walk down the error stack to find an SSL or net error.
 209       uint32_t error_code;
 210       const char* file;
 211       int line;
 212       do {
 213         error_code = ERR_get_error_line(&file, &line);
 214         if (ERR_GET_LIB(error_code) == ERR_LIB_SSL) {
 215           out_error_info->error_code = error_code;
 216           out_error_info->file = file;
 217           out_error_info->line = line;
 218           return MapOpenSSLErrorSSL(error_code);
 219         } else if (ERR_GET_LIB(error_code) == OpenSSLNetErrorLib()) {
 220           out_error_info->error_code = error_code;
 221           out_error_info->file = file;
 222           out_error_info->line = line;
 223           // Net error codes are negative but encoded in OpenSSL as positive
 224           // numbers.
 225           return -ERR_GET_REASON(error_code);
 226         }
 227       } while (error_code != 0);
 228       return ERR_FAILED;
 229     default:
 230       // TODO(joth): Implement full mapping.
 231       LOG(WARNING) << "Unknown OpenSSL error " << err;
 232       return ERR_SSL_PROTOCOL_ERROR;
 233   }
 234 }
 235
 236 NetLog::ParametersCallback CreateNetLogOpenSSLErrorCallback(
 237     int net_error,
 238     int ssl_error,
 239     const OpenSSLErrorInfo& error_info) {
 240   return base::Bind(&NetLogOpenSSLErrorCallback,
 241                     net_error, ssl_error, error_info);
 242 }
 243
 244 }  // namespace net