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cobalt / cobalt / 71840339e1109efe930df5c60712d91cdcc962a8 / . / src / net / socket / ssl_client_socket_nss.cc
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This file includes code SSLClientSocketNSS::DoVerifyCertComplete() derived
// from AuthCertificateCallback() in
// mozilla/security/manager/ssl/src/nsNSSCallbacks.cpp.
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ian McGreer <mcgreer@netscape.com>
* Javier Delgadillo <javi@netscape.com>
* Kai Engert <kengert@redhat.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "net/socket/ssl_client_socket_nss.h"
#include <certdb.h>
#include <hasht.h>
#include <keyhi.h>
#include <nspr.h>
#include <nss.h>
#include <ocsp.h>
#include <pk11pub.h>
#include <secerr.h>
#include <sechash.h>
#include <ssl.h>
#include <sslerr.h>
#include <sslproto.h>
#include <algorithm>
#include <limits>
#include <map>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback_helpers.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/memory/singleton.h"
#include "base/metrics/histogram.h"
#include "base/single_thread_task_runner.h"
#include "base/stl_util.h"
#include "base/string_number_conversions.h"
#include "base/string_util.h"
#include "base/stringprintf.h"
#include "base/thread_task_runner_handle.h"
#include "base/threading/thread_restrictions.h"
#include "base/values.h"
#include "crypto/ec_private_key.h"
#include "crypto/nss_util.h"
#include "crypto/nss_util_internal.h"
#include "crypto/rsa_private_key.h"
#include "crypto/scoped_nss_types.h"
#include "net/base/address_list.h"
#include "net/base/asn1_util.h"
#include "net/base/cert_status_flags.h"
#include "net/base/cert_verifier.h"
#include "net/base/connection_type_histograms.h"
#include "net/base/dns_util.h"
#include "net/base/transport_security_state.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "net/base/net_log.h"
#include "net/base/single_request_cert_verifier.h"
#include "net/base/ssl_cert_request_info.h"
#include "net/base/ssl_connection_status_flags.h"
#include "net/base/ssl_info.h"
#include "net/base/x509_certificate_net_log_param.h"
#include "net/base/x509_util.h"
#include "net/ocsp/nss_ocsp.h"
#include "net/socket/client_socket_handle.h"
#include "net/socket/nss_ssl_util.h"
#include "net/socket/ssl_error_params.h"
#if defined(OS_WIN)
#include <windows.h>
#include <wincrypt.h>
#elif defined(OS_MACOSX)
#include <Security/SecBase.h>
#include <Security/SecCertificate.h>
#include <Security/SecIdentity.h>
#include "base/mac/mac_logging.h"
#elif defined(USE_NSS)
#include <dlfcn.h>
#endif
// SSL plaintext fragments are shorter than 16KB. Although the record layer
// overhead is allowed to be 2K + 5 bytes, in practice the overhead is much
// smaller than 1KB. So a 17KB buffer should be large enough to hold an
// entire SSL record.
static const int kRecvBufferSize = 17 * 1024;
static const int kSendBufferSize = 17 * 1024;
#if defined(OS_WIN)
// CERT_OCSP_RESPONSE_PROP_ID is only implemented on Vista+, but it can be
// set on Windows XP without error. There is some overhead from the server
// sending the OCSP response if it supports the extension, for the subset of
// XP clients who will request it but be unable to use it, but this is an
// acceptable trade-off for simplicity of implementation.
static bool IsOCSPStaplingSupported() {
return true;
}
#elif defined(USE_NSS)
typedef SECStatus
(*CacheOCSPResponseFromSideChannelFunction)(
CERTCertDBHandle *handle, CERTCertificate *cert, PRTime time,
SECItem *encodedResponse, void *pwArg);
// On Linux, we dynamically link against the system version of libnss3.so. In
// order to continue working on systems without up-to-date versions of NSS we
// lookup CERT_CacheOCSPResponseFromSideChannel with dlsym.
// RuntimeLibNSSFunctionPointers is a singleton which caches the results of any
// runtime symbol resolution that we need.
class RuntimeLibNSSFunctionPointers {
public:
CacheOCSPResponseFromSideChannelFunction
GetCacheOCSPResponseFromSideChannelFunction() {
return cache_ocsp_response_from_side_channel_;
}
static RuntimeLibNSSFunctionPointers* GetInstance() {
return Singleton<RuntimeLibNSSFunctionPointers>::get();
}
private:
friend struct DefaultSingletonTraits<RuntimeLibNSSFunctionPointers>;
RuntimeLibNSSFunctionPointers() {
cache_ocsp_response_from_side_channel_ =
(CacheOCSPResponseFromSideChannelFunction)
dlsym(RTLD_DEFAULT, "CERT_CacheOCSPResponseFromSideChannel");
}
CacheOCSPResponseFromSideChannelFunction
cache_ocsp_response_from_side_channel_;
};
static CacheOCSPResponseFromSideChannelFunction
GetCacheOCSPResponseFromSideChannelFunction() {
return RuntimeLibNSSFunctionPointers::GetInstance()
->GetCacheOCSPResponseFromSideChannelFunction();
}
static bool IsOCSPStaplingSupported() {
return GetCacheOCSPResponseFromSideChannelFunction() != NULL;
}
#else
// TODO(agl): Figure out if we can plumb the OCSP response into Mac's system
// certificate validation functions.
static bool IsOCSPStaplingSupported() {
return false;
}
#endif
namespace net {
// State machines are easier to debug if you log state transitions.
// Enable these if you want to see what's going on.
#if 1
#define EnterFunction(x)
#define LeaveFunction(x)
#define GotoState(s) next_handshake_state_ = s
#else
#define EnterFunction(x)\
VLOG(1) << (void *)this << " " << __FUNCTION__ << " enter " << x\
<< "; next_handshake_state " << next_handshake_state_
#define LeaveFunction(x)\
VLOG(1) << (void *)this << " " << __FUNCTION__ << " leave " << x\
<< "; next_handshake_state " << next_handshake_state_
#define GotoState(s)\
do {\
VLOG(1) << (void *)this << " " << __FUNCTION__ << " jump to state " << s;\
next_handshake_state_ = s;\
} while (0)
#endif
namespace {
class FreeCERTCertificate {
public:
inline void operator()(CERTCertificate* x) const {
CERT_DestroyCertificate(x);
}
};
typedef scoped_ptr_malloc<CERTCertificate, FreeCERTCertificate>
ScopedCERTCertificate;
#if defined(OS_WIN)
// This callback is intended to be used with CertFindChainInStore. In addition
// to filtering by extended/enhanced key usage, we do not show expired
// certificates and require digital signature usage in the key usage
// extension.
//
// This matches our behavior on Mac OS X and that of NSS. It also matches the
// default behavior of IE8. See http://support.microsoft.com/kb/890326 and
// http://blogs.msdn.com/b/askie/archive/2009/06/09/my-expired-client-certificates-no-longer-display-when-connecting-to-my-web-server-using-ie8.aspx
BOOL WINAPI ClientCertFindCallback(PCCERT_CONTEXT cert_context,
void* find_arg) {
VLOG(1) << "Calling ClientCertFindCallback from _nss";
// Verify the certificate's KU is good.
BYTE key_usage;
if (CertGetIntendedKeyUsage(X509_ASN_ENCODING, cert_context->pCertInfo,
&key_usage, 1)) {
if (!(key_usage & CERT_DIGITAL_SIGNATURE_KEY_USAGE))
return FALSE;
} else {
DWORD err = GetLastError();
// If |err| is non-zero, it's an actual error. Otherwise the extension
// just isn't present, and we treat it as if everything was allowed.
if (err) {
DLOG(ERROR) << "CertGetIntendedKeyUsage failed: " << err;
return FALSE;
}
}
// Verify the current time is within the certificate's validity period.
if (CertVerifyTimeValidity(NULL, cert_context->pCertInfo) != 0)
return FALSE;
// Verify private key metadata is associated with this certificate.
DWORD size = 0;
if (!CertGetCertificateContextProperty(
cert_context, CERT_KEY_PROV_INFO_PROP_ID, NULL, &size)) {
return FALSE;
}
return TRUE;
}
#endif
void DestroyCertificates(CERTCertificate** certs, size_t len) {
for (size_t i = 0; i < len; i++)
CERT_DestroyCertificate(certs[i]);
}
// Helper functions to make it possible to log events from within the
// SSLClientSocketNSS::Core.
void AddLogEvent(BoundNetLog* net_log, NetLog::EventType event_type) {
if (!net_log)
return;
net_log->AddEvent(event_type);
}
// Helper function to make it possible to log events from within the
// SSLClientSocketNSS::Core.
void AddLogEventWithCallback(BoundNetLog* net_log,
NetLog::EventType event_type,
const NetLog::ParametersCallback& callback) {
if (!net_log)
return;
net_log->AddEvent(event_type, callback);
}
// Helper function to make it easier to call BoundNetLog::AddByteTransferEvent
// from within the SSLClientSocketNSS::Core.
// AddByteTransferEvent expects to receive a const char*, which within the
// Core is backed by an IOBuffer. If the "const char*" is bound via
// base::Bind and posted to another thread, and the IOBuffer that backs that
// pointer then goes out of scope on the origin thread, this would result in
// an invalid read of a stale pointer.
// Instead, provide a signature that accepts an IOBuffer*, so that a reference
// to the owning IOBuffer can be bound to the Callback. This ensures that the
// IOBuffer will stay alive long enough to cross threads if needed.
void LogByteTransferEvent(BoundNetLog* net_log, NetLog::EventType event_type,
int len, IOBuffer* buffer) {
if (!net_log)
return;
net_log->AddByteTransferEvent(event_type, len, buffer->data());
}
// PeerCertificateChain is a helper object which extracts the certificate
// chain, as given by the server, from an NSS socket and performs the needed
// resource management. The first element of the chain is the leaf certificate
// and the other elements are in the order given by the server.
class PeerCertificateChain {
public:
PeerCertificateChain() {}
PeerCertificateChain(const PeerCertificateChain& other);
~PeerCertificateChain();
PeerCertificateChain& operator=(const PeerCertificateChain& other);
// Resets the current chain, freeing any resources, and updates the current
// chain to be a copy of the chain stored in |nss_fd|.
// If |nss_fd| is NULL, then the current certificate chain will be freed.
void Reset(PRFileDesc* nss_fd);
// Returns the current certificate chain as a vector of DER-encoded
// base::StringPieces. The returned vector remains valid until Reset is
// called.
std::vector<base::StringPiece> AsStringPieceVector() const;
bool empty() const { return certs_.empty(); }
size_t size() const { return certs_.size(); }
CERTCertificate* operator[](size_t index) const {
DCHECK_LT(index, certs_.size());
return certs_[index];
}
private:
std::vector<CERTCertificate*> certs_;
};
PeerCertificateChain::PeerCertificateChain(
const PeerCertificateChain& other) {
*this = other;
}
PeerCertificateChain::~PeerCertificateChain() {
Reset(NULL);
}
PeerCertificateChain& PeerCertificateChain::operator=(
const PeerCertificateChain& other) {
if (this == &other)
return *this;
Reset(NULL);
certs_.reserve(other.certs_.size());
for (size_t i = 0; i < other.certs_.size(); ++i)
certs_.push_back(CERT_DupCertificate(other.certs_[i]));
return *this;
}
void PeerCertificateChain::Reset(PRFileDesc* nss_fd) {
for (size_t i = 0; i < certs_.size(); ++i)
CERT_DestroyCertificate(certs_[i]);
certs_.clear();
if (nss_fd == NULL)
return;
unsigned int num_certs = 0;
SECStatus rv = SSL_PeerCertificateChain(nss_fd, NULL, &num_certs, 0);
DCHECK_EQ(SECSuccess, rv);
// The handshake on |nss_fd| may not have completed.
if (num_certs == 0)
return;
certs_.resize(num_certs);
const unsigned int expected_num_certs = num_certs;
rv = SSL_PeerCertificateChain(nss_fd, vector_as_array(&certs_),
&num_certs, expected_num_certs);
DCHECK_EQ(SECSuccess, rv);
DCHECK_EQ(expected_num_certs, num_certs);
}
std::vector<base::StringPiece>
PeerCertificateChain::AsStringPieceVector() const {
std::vector<base::StringPiece> v(certs_.size());
for (unsigned i = 0; i < certs_.size(); i++) {
v[i] = base::StringPiece(
reinterpret_cast<const char*>(certs_[i]->derCert.data),
certs_[i]->derCert.len);
}
return v;
}
// HandshakeState is a helper struct used to pass handshake state between
// the NSS task runner and the network task runner.
//
// It contains members that may be read or written on the NSS task runner,
// but which also need to be read from the network task runner. The NSS task
// runner will notify the network task runner whenever this state changes, so
// that the network task runner can safely make a copy, which avoids the need
// for locking.
struct HandshakeState {
HandshakeState() { Reset(); }
void Reset() {
next_proto_status = SSLClientSocket::kNextProtoUnsupported;
next_proto.clear();
server_protos.clear();
channel_id_sent = false;
client_certs.clear();
server_cert_chain.Reset(NULL);
server_cert = NULL;
resumed_handshake = false;
ssl_connection_status = 0;
}
// Set to kNextProtoNegotiated if NPN was successfully negotiated, with the
// negotiated protocol stored in |next_proto|.
SSLClientSocket::NextProtoStatus next_proto_status;
std::string next_proto;
// If the server supports NPN, the protocols supported by the server.
std::string server_protos;
// True if a channel ID was sent.
bool channel_id_sent;
// If the peer requests client certificate authentication, the set of
// certificates that matched the peer's criteria.
CertificateList client_certs;
// Set when the handshake fully completes.
//
// The server certificate is first received from NSS as an NSS certificate
// chain (|server_cert_chain|) and then converted into a platform-specific
// X509Certificate object (|server_cert|). It's possible for some
// certificates to be successfully parsed by NSS, and not by the platform
// libraries (i.e.: when running within a sandbox, different parsing
// algorithms, etc), so it's not safe to assume that |server_cert| will
// always be non-NULL.
PeerCertificateChain server_cert_chain;
scoped_refptr<X509Certificate> server_cert;
// True if the current handshake was the result of TLS session resumption.
bool resumed_handshake;
// The negotiated security parameters (TLS version, cipher, extensions) of
// the SSL connection.
int ssl_connection_status;
};
// Client-side error mapping functions.
// Map NSS error code to network error code.
int MapNSSClientError(PRErrorCode err) {
switch (err) {
case SSL_ERROR_BAD_CERT_ALERT:
case SSL_ERROR_UNSUPPORTED_CERT_ALERT:
case SSL_ERROR_REVOKED_CERT_ALERT:
case SSL_ERROR_EXPIRED_CERT_ALERT:
case SSL_ERROR_CERTIFICATE_UNKNOWN_ALERT:
case SSL_ERROR_UNKNOWN_CA_ALERT:
case SSL_ERROR_ACCESS_DENIED_ALERT:
return ERR_BAD_SSL_CLIENT_AUTH_CERT;
default:
return MapNSSError(err);
}
}
// Map NSS error code from the first SSL handshake to network error code.
int MapNSSClientHandshakeError(PRErrorCode err) {
switch (err) {
// If the server closed on us, it is a protocol error.
// Some TLS-intolerant servers do this when we request TLS.
case PR_END_OF_FILE_ERROR:
return ERR_SSL_PROTOCOL_ERROR;
default:
return MapNSSClientError(err);
}
}
} // namespace
// SSLClientSocketNSS::Core provides a thread-safe, ref-counted core that is
// able to marshal data between NSS functions and an underlying transport
// socket.
//
// All public functions are meant to be called from the network task runner,
// and any callbacks supplied will be invoked there as well, provided that
// Detach() has not been called yet.
//
/////////////////////////////////////////////////////////////////////////////
//
// Threading within SSLClientSocketNSS and SSLClientSocketNSS::Core:
//
// Because NSS may block on either hardware or user input during operations
// such as signing, creating certificates, or locating private keys, the Core
// handles all of the interactions with the underlying NSS SSL socket, so
// that these blocking calls can be executed on a dedicated task runner.
//
// Note that the network task runner and the NSS task runner may be executing
// on the same thread. If that happens, then it's more performant to try to
// complete as much work as possible synchronously, even if it might block,
// rather than continually PostTask-ing to the same thread.
//
// Because NSS functions should only be called on the NSS task runner, while
// I/O resources should only be accessed on the network task runner, most
// public functions are implemented via three methods, each with different
// task runner affinities.
//
// In the single-threaded mode (where the network and NSS task runners run on
// the same thread), these are all attempted synchronously, while in the
// multi-threaded mode, message passing is used.
//
// 1) NSS Task Runner: Execute NSS function (DoPayloadRead, DoPayloadWrite,
// DoHandshake)
// 2) NSS Task Runner: Prepare data to go from NSS to an IO function:
// (BufferRecv, BufferSend)
// 3) Network Task Runner: Perform IO on that data (DoBufferRecv,
// DoBufferSend, DoGetDomainBoundCert, OnGetDomainBoundCertComplete)
// 4) Both Task Runners: Callback for asynchronous completion or to marshal
// data from the network task runner back to NSS (BufferRecvComplete,
// BufferSendComplete, OnHandshakeIOComplete)
//
/////////////////////////////////////////////////////////////////////////////
// Single-threaded example
//
// |--------------------------Network Task Runner--------------------------|
// SSLClientSocketNSS Core (Transport Socket)
// Read()
// |-------------------------V
// Read()
// |
// DoPayloadRead()
// |
// BufferRecv()
// |
// DoBufferRecv()
// |-------------------------V
// Read()
// V-------------------------|
// BufferRecvComplete()
// |
// PostOrRunCallback()
// V-------------------------|
// (Read Callback)
//
/////////////////////////////////////////////////////////////////////////////
// Multi-threaded example:
//
// |--------------------Network Task Runner-------------|--NSS Task Runner--|
// SSLClientSocketNSS Core Socket Core
// Read()
// |---------------------V
// Read()
// |-------------------------------V
// Read()
// |
// DoPayloadRead()
// |
// BufferRecv
// V-------------------------------|
// DoBufferRecv
// |----------------V
// Read()
// V----------------|
// BufferRecvComplete()
// |-------------------------------V
// BufferRecvComplete()
// |
// PostOrRunCallback()
// V-------------------------------|
// PostOrRunCallback()
// V---------------------|
// (Read Callback)
//
/////////////////////////////////////////////////////////////////////////////
class SSLClientSocketNSS::Core : public base::RefCountedThreadSafe<Core> {
public:
// Creates a new Core.
//
// Any calls to NSS are executed on the |nss_task_runner|, while any calls
// that need to operate on the underlying transport, net log, or server
// bound certificate fetching will happen on the |network_task_runner|, so
// that their lifetimes match that of the owning SSLClientSocketNSS.
//
// The caller retains ownership of |transport|, |net_log|, and
// |server_bound_cert_service|, and they will not be accessed once Detach()
// has been called.
Core(base::SequencedTaskRunner* network_task_runner,
base::SequencedTaskRunner* nss_task_runner,
ClientSocketHandle* transport,
const HostPortPair& host_and_port,
const SSLConfig& ssl_config,
BoundNetLog* net_log,
ServerBoundCertService* server_bound_cert_service);
// Called on the network task runner.
// Transfers ownership of |socket|, an NSS SSL socket, and |buffers|, the
// underlying memio implementation, to the Core. Returns true if the Core
// was successfully registered with the socket.
bool Init(PRFileDesc* socket, memio_Private* buffers);
// Called on the network task runner.
// Sets the predicted certificate chain that the peer will send, for use
// with the TLS CachedInfo extension. If called, it must not be called
// before Init() or after Connect().
void SetPredictedCertificates(
const std::vector<std::string>& predicted_certificates);
// Called on the network task runner.
//
// Attempts to perform an SSL handshake. If the handshake cannot be
// completed synchronously, returns ERR_IO_PENDING, invoking |callback| on
// the network task runner once the handshake has completed. Otherwise,
// returns OK on success or a network error code on failure.
int Connect(const CompletionCallback& callback);
// Called on the network task runner.
// Signals that the resources owned by the network task runner are going
// away. No further callbacks will be invoked on the network task runner.
// May be called at any time.
void Detach();
// Called on the network task runner.
// Returns the current state of the underlying SSL socket. May be called at
// any time.
const HandshakeState& state() const { return network_handshake_state_; }
// Called on the network task runner.
// Read() and Write() mirror the net::Socket functions of the same name.
// If ERR_IO_PENDING is returned, |callback| will be invoked on the network
// task runner at a later point, unless the caller calls Detach().
int Read(IOBuffer* buf, int buf_len, const CompletionCallback& callback);
int Write(IOBuffer* buf, int buf_len, const CompletionCallback& callback);
private:
friend class base::RefCountedThreadSafe<Core>;
~Core();
enum State {
STATE_NONE,
STATE_HANDSHAKE,
STATE_GET_DOMAIN_BOUND_CERT_COMPLETE,
};
bool OnNSSTaskRunner() const;
bool OnNetworkTaskRunner() const;
////////////////////////////////////////////////////////////////////////////
// Methods that are ONLY called on the NSS task runner:
////////////////////////////////////////////////////////////////////////////
// Called by NSS during full handshakes to allow the application to
// verify the certificate. Instead of verifying the certificate in the midst
// of the handshake, SECSuccess is always returned and the peer's certificate
// is verified afterwards.
// This behaviour is an artifact of the original SSLClientSocketWin
// implementation, which could not verify the peer's certificate until after
// the handshake had completed, as well as bugs in NSS that prevent
// SSL_RestartHandshakeAfterCertReq from working.
static SECStatus OwnAuthCertHandler(void* arg,
PRFileDesc* socket,
PRBool checksig,
PRBool is_server);
// Callbacks called by NSS when the peer requests client certificate
// authentication.
// See the documentation in third_party/nss/ssl/ssl.h for the meanings of
// the arguments.
#if defined(NSS_PLATFORM_CLIENT_AUTH)
// When NSS has been integrated with awareness of the underlying system
// cryptographic libraries, this callback allows the caller to supply a
// native platform certificate and key for use by NSS. At most, one of
// either (result_certs, result_private_key) or (result_nss_certificate,
// result_nss_private_key) should be set.
// |arg| contains a pointer to the current SSLClientSocketNSS::Core.
static SECStatus PlatformClientAuthHandler(
void* arg,
PRFileDesc* socket,
CERTDistNames* ca_names,
CERTCertList** result_certs,
void** result_private_key,
CERTCertificate** result_nss_certificate,
SECKEYPrivateKey** result_nss_private_key);
#else
static SECStatus ClientAuthHandler(void* arg,
PRFileDesc* socket,
CERTDistNames* ca_names,
CERTCertificate** result_certificate,
SECKEYPrivateKey** result_private_key);
#endif
// Called by NSS once the handshake has completed.
// |arg| contains a pointer to the current SSLClientSocketNSS::Core.
static void HandshakeCallback(PRFileDesc* socket, void* arg);
// Called by NSS if the peer supports the NPN handshake extension, to allow
// the application to select the protocol to use.
// See the documentation for SSLNextProtocolCallback in
// third_party/nss/ssl/ssl.h for the meanings of the arguments.
// |arg| contains a pointer to the current SSLClientSocketNSS::Core.
static SECStatus NextProtoCallback(void* arg,
PRFileDesc* fd,
const unsigned char* protos,
unsigned int protos_len,
unsigned char* proto_out,
unsigned int* proto_out_len,
unsigned int proto_max_len);
// Handles an NSS error generated while handshaking or performing IO.
// Returns a network error code mapped from the original NSS error.
int HandleNSSError(PRErrorCode error, bool handshake_error);
int DoHandshakeLoop(int last_io_result);
int DoReadLoop(int result);
int DoWriteLoop(int result);
int DoHandshake();
int DoGetDBCertComplete(int result);
int DoPayloadRead();
int DoPayloadWrite();
bool DoTransportIO();
int BufferRecv();
int BufferSend();
void OnRecvComplete(int result);
void OnSendComplete(int result);
void DoConnectCallback(int result);
void DoReadCallback(int result);
void DoWriteCallback(int result);
// Client channel ID handler.
static SECStatus ClientChannelIDHandler(
void* arg,
PRFileDesc* socket,
SECKEYPublicKey **out_public_key,
SECKEYPrivateKey **out_private_key);
// ImportChannelIDKeys is a helper function for turning a DER-encoded cert and
// key into a SECKEYPublicKey and SECKEYPrivateKey. Returns OK upon success
// and an error code otherwise.
// Requires |domain_bound_private_key_| and |domain_bound_cert_| to have been
// set by a call to ServerBoundCertService->GetDomainBoundCert. The caller
// takes ownership of the |*cert| and |*key|.
int ImportChannelIDKeys(SECKEYPublicKey** public_key, SECKEYPrivateKey** key);
// Updates the NSS and platform specific certificates.
void UpdateServerCert();
// Updates the nss_handshake_state_ with the negotiated security parameters.
void UpdateConnectionStatus();
// Record histograms for channel id support during full handshakes - resumed
// handshakes are ignored.
void RecordChannelIDSupport() const;
////////////////////////////////////////////////////////////////////////////
// Methods that are ONLY called on the network task runner:
////////////////////////////////////////////////////////////////////////////
int DoBufferRecv(IOBuffer* buffer, int len);
int DoBufferSend(IOBuffer* buffer, int len);
int DoGetDomainBoundCert(const std::string& origin,
const std::vector<uint8>& requested_cert_types);
void OnGetDomainBoundCertComplete(int result);
void OnHandshakeStateUpdated(const HandshakeState& state);
////////////////////////////////////////////////////////////////////////////
// Methods that are called on both the network task runner and the NSS
// task runner.
////////////////////////////////////////////////////////////////////////////
void OnHandshakeIOComplete(int result);
void BufferRecvComplete(IOBuffer* buffer, int result);
void BufferSendComplete(int result);
// PostOrRunCallback is a helper function to ensure that |callback| is
// invoked on the network task runner, but only if Detach() has not yet
// been called.
void PostOrRunCallback(const tracked_objects::Location& location,
const base::Closure& callback);
// Uses PostOrRunCallback and |weak_net_log_| to try and log a
// SSL_CLIENT_CERT_PROVIDED event, with the indicated count.
void AddCertProvidedEvent(int cert_count);
// Sets the handshake state |channel_id_sent| flag and logs the
// SSL_CHANNEL_ID_PROVIDED event.
void SetChannelIDProvided();
////////////////////////////////////////////////////////////////////////////
// Members that are ONLY accessed on the network task runner:
////////////////////////////////////////////////////////////////////////////
// True if the owning SSLClientSocketNSS has called Detach(). No further
// callbacks will be invoked nor access to members owned by the network
// task runner.
bool detached_;
// The underlying transport to use for network IO.
ClientSocketHandle* transport_;
base::WeakPtrFactory<BoundNetLog> weak_net_log_factory_;
// The current handshake state. Mirrors |nss_handshake_state_|.
HandshakeState network_handshake_state_;
// The service for retrieving Channel ID keys. May be NULL.
ServerBoundCertService* server_bound_cert_service_;
ServerBoundCertService::RequestHandle domain_bound_cert_request_handle_;
////////////////////////////////////////////////////////////////////////////
// Members that are ONLY accessed on the NSS task runner:
////////////////////////////////////////////////////////////////////////////
HostPortPair host_and_port_;
SSLConfig ssl_config_;
// NSS SSL socket.
PRFileDesc* nss_fd_;
// Buffers for the network end of the SSL state machine
memio_Private* nss_bufs_;
// The certificate chain, in DER form, that is expected to be received from
// the server.
std::vector<std::string> predicted_certs_;
State next_handshake_state_;
// True if channel ID extension was negotiated.
bool channel_id_xtn_negotiated_;
// True if the handshake state machine was interrupted for channel ID.
bool channel_id_needed_;
// True if the handshake state machine was interrupted for client auth.
bool client_auth_cert_needed_;
// True if NSS has called HandshakeCallback.
bool handshake_callback_called_;
HandshakeState nss_handshake_state_;
bool transport_recv_busy_;
bool transport_recv_eof_;
bool transport_send_busy_;
// Used by Read function.
scoped_refptr<IOBuffer> user_read_buf_;
int user_read_buf_len_;
// Used by Write function.
scoped_refptr<IOBuffer> user_write_buf_;
int user_write_buf_len_;
CompletionCallback user_connect_callback_;
CompletionCallback user_read_callback_;
CompletionCallback user_write_callback_;
////////////////////////////////////////////////////////////////////////////
// Members that are accessed on both the network task runner and the NSS
// task runner.
////////////////////////////////////////////////////////////////////////////
scoped_refptr<base::SequencedTaskRunner> network_task_runner_;
scoped_refptr<base::SequencedTaskRunner> nss_task_runner_;
// Dereferenced only on the network task runner, but bound to tasks destined
// for the network task runner from the NSS task runner.
base::WeakPtr<BoundNetLog> weak_net_log_;
// Written on the network task runner by the |server_bound_cert_service_|,
// prior to invoking OnHandshakeIOComplete.
// Read on the NSS task runner when once OnHandshakeIOComplete is invoked
// on the NSS task runner.
SSLClientCertType domain_bound_cert_type_;
std::string domain_bound_private_key_;
std::string domain_bound_cert_;
DISALLOW_COPY_AND_ASSIGN(Core);
};
SSLClientSocketNSS::Core::Core(
base::SequencedTaskRunner* network_task_runner,
base::SequencedTaskRunner* nss_task_runner,
ClientSocketHandle* transport,
const HostPortPair& host_and_port,
const SSLConfig& ssl_config,
BoundNetLog* net_log,
ServerBoundCertService* server_bound_cert_service)
: detached_(false),
transport_(transport),
weak_net_log_factory_(net_log),
server_bound_cert_service_(server_bound_cert_service),
domain_bound_cert_request_handle_(NULL),
host_and_port_(host_and_port),
ssl_config_(ssl_config),
nss_fd_(NULL),
nss_bufs_(NULL),
next_handshake_state_(STATE_NONE),
channel_id_xtn_negotiated_(false),
channel_id_needed_(false),
client_auth_cert_needed_(false),
handshake_callback_called_(false),
transport_recv_busy_(false),
transport_recv_eof_(false),
transport_send_busy_(false),
user_read_buf_len_(0),
user_write_buf_len_(0),
network_task_runner_(network_task_runner),
nss_task_runner_(nss_task_runner),
weak_net_log_(weak_net_log_factory_.GetWeakPtr()),
domain_bound_cert_type_(CLIENT_CERT_INVALID_TYPE) {
}
SSLClientSocketNSS::Core::~Core() {
// TODO(wtc): Send SSL close_notify alert.
if (nss_fd_ != NULL) {
PR_Close(nss_fd_);
nss_fd_ = NULL;
}
}
bool SSLClientSocketNSS::Core::Init(PRFileDesc* socket,
memio_Private* buffers) {
DCHECK(OnNetworkTaskRunner());
DCHECK(!nss_fd_);
DCHECK(!nss_bufs_);
nss_fd_ = socket;
nss_bufs_ = buffers;
SECStatus rv = SECSuccess;
if (!ssl_config_.next_protos.empty()) {
rv = SSL_SetNextProtoCallback(
nss_fd_, SSLClientSocketNSS::Core::NextProtoCallback, this);
if (rv != SECSuccess)
LogFailedNSSFunction(*weak_net_log_, "SSL_SetNextProtoCallback", "");
}
rv = SSL_AuthCertificateHook(
nss_fd_, SSLClientSocketNSS::Core::OwnAuthCertHandler, this);
if (rv != SECSuccess) {
LogFailedNSSFunction(*weak_net_log_, "SSL_AuthCertificateHook", "");
return false;
}
#if defined(NSS_PLATFORM_CLIENT_AUTH)
rv = SSL_GetPlatformClientAuthDataHook(
nss_fd_, SSLClientSocketNSS::Core::PlatformClientAuthHandler,
this);
#else
rv = SSL_GetClientAuthDataHook(
nss_fd_, SSLClientSocketNSS::Core::ClientAuthHandler, this);
#endif
if (rv != SECSuccess) {
LogFailedNSSFunction(*weak_net_log_, "SSL_GetClientAuthDataHook", "");
return false;
}
if (ssl_config_.channel_id_enabled) {
if (!server_bound_cert_service_) {
DVLOG(1) << "NULL server_bound_cert_service_, not enabling channel ID.";
} else if (!crypto::ECPrivateKey::IsSupported()) {
DVLOG(1) << "Elliptic Curve not supported, not enabling channel ID.";
} else if (!server_bound_cert_service_->IsSystemTimeValid()) {
DVLOG(1) << "System time is weird, not enabling channel ID.";
} else {
rv = SSL_SetClientChannelIDCallback(
nss_fd_, SSLClientSocketNSS::Core::ClientChannelIDHandler, this);
if (rv != SECSuccess)
LogFailedNSSFunction(*weak_net_log_, "SSL_SetClientChannelIDCallback",
"");
}
}
rv = SSL_HandshakeCallback(
nss_fd_, SSLClientSocketNSS::Core::HandshakeCallback, this);
if (rv != SECSuccess) {
LogFailedNSSFunction(*weak_net_log_, "SSL_HandshakeCallback", "");
return false;
}
return true;
}
void SSLClientSocketNSS::Core::SetPredictedCertificates(
const std::vector<std::string>& predicted_certs) {
if (predicted_certs.empty())
return;
if (!OnNSSTaskRunner()) {
DCHECK(!detached_);
nss_task_runner_->PostTask(
FROM_HERE,
base::Bind(&Core::SetPredictedCertificates, this, predicted_certs));
return;
}
DCHECK(nss_fd_);
predicted_certs_ = predicted_certs;
scoped_array<CERTCertificate*> certs(
new CERTCertificate*[predicted_certs.size()]);
for (size_t i = 0; i < predicted_certs.size(); i++) {
SECItem derCert;
derCert.data = const_cast<uint8*>(reinterpret_cast<const uint8*>(
predicted_certs[i].data()));
derCert.len = predicted_certs[i].size();
certs[i] = CERT_NewTempCertificate(
CERT_GetDefaultCertDB(), &derCert, NULL /* no nickname given */,
PR_FALSE /* not permanent */, PR_TRUE /* copy DER data */);
if (!certs[i]) {
DestroyCertificates(&certs[0], i);
NOTREACHED();
return;
}
}
SECStatus rv;
#ifdef SSL_ENABLE_CACHED_INFO
rv = SSL_SetPredictedPeerCertificates(nss_fd_, certs.get(),
predicted_certs.size());
DCHECK_EQ(SECSuccess, rv);
#else
rv = SECFailure; // Not implemented.
#endif
DestroyCertificates(&certs[0], predicted_certs.size());
if (rv != SECSuccess) {
LOG(WARNING) << "SetPredictedCertificates failed: "
<< host_and_port_.ToString();
}
}
int SSLClientSocketNSS::Core::Connect(const CompletionCallback& callback) {
if (!OnNSSTaskRunner()) {
DCHECK(!detached_);
bool posted = nss_task_runner_->PostTask(
FROM_HERE,
base::Bind(IgnoreResult(&Core::Connect), this, callback));
return posted ? ERR_IO_PENDING : ERR_ABORTED;
}
DCHECK(OnNSSTaskRunner());
DCHECK_EQ(STATE_NONE, next_handshake_state_);
DCHECK(user_read_callback_.is_null());
DCHECK(user_write_callback_.is_null());
DCHECK(user_connect_callback_.is_null());
DCHECK(!user_read_buf_);
DCHECK(!user_write_buf_);
next_handshake_state_ = STATE_HANDSHAKE;
int rv = DoHandshakeLoop(OK);
if (rv == ERR_IO_PENDING) {
user_connect_callback_ = callback;
} else if (rv > OK) {
rv = OK;
}
if (rv != ERR_IO_PENDING && !OnNetworkTaskRunner()) {
PostOrRunCallback(FROM_HERE, base::Bind(callback, rv));
return ERR_IO_PENDING;
}
return rv;
}
void SSLClientSocketNSS::Core::Detach() {
DCHECK(OnNetworkTaskRunner());
detached_ = true;
transport_ = NULL;
weak_net_log_factory_.InvalidateWeakPtrs();
network_handshake_state_.Reset();
if (domain_bound_cert_request_handle_ != NULL) {
server_bound_cert_service_->CancelRequest(
domain_bound_cert_request_handle_);
domain_bound_cert_request_handle_ = NULL;
}
}
int SSLClientSocketNSS::Core::Read(IOBuffer* buf, int buf_len,
const CompletionCallback& callback) {
if (!OnNSSTaskRunner()) {
DCHECK(OnNetworkTaskRunner());
DCHECK(!detached_);
DCHECK(transport_);
bool posted = nss_task_runner_->PostTask(
FROM_HERE,
base::Bind(IgnoreResult(&Core::Read), this, make_scoped_refptr(buf),
buf_len, callback));
return posted ? ERR_IO_PENDING : ERR_ABORTED;
}
DCHECK(OnNSSTaskRunner());
DCHECK(handshake_callback_called_);
DCHECK_EQ(STATE_NONE, next_handshake_state_);
DCHECK(user_read_callback_.is_null());
DCHECK(user_connect_callback_.is_null());
DCHECK(!user_read_buf_);
DCHECK(nss_bufs_);
user_read_buf_ = buf;
user_read_buf_len_ = buf_len;
int rv = DoReadLoop(OK);
if (rv == ERR_IO_PENDING) {
user_read_callback_ = callback;
} else {
user_read_buf_ = NULL;
user_read_buf_len_ = 0;
if (!OnNetworkTaskRunner()) {
PostOrRunCallback(FROM_HERE, base::Bind(callback, rv));
return ERR_IO_PENDING;
}
}
return rv;
}
int SSLClientSocketNSS::Core::Write(IOBuffer* buf, int buf_len,
const CompletionCallback& callback) {
if (!OnNSSTaskRunner()) {
DCHECK(OnNetworkTaskRunner());
DCHECK(!detached_);
DCHECK(transport_);
bool posted = nss_task_runner_->PostTask(
FROM_HERE,
base::Bind(IgnoreResult(&Core::Write), this, make_scoped_refptr(buf),
buf_len, callback));
int rv = posted ? ERR_IO_PENDING : ERR_ABORTED;
return rv;
}
DCHECK(OnNSSTaskRunner());
DCHECK(handshake_callback_called_);
DCHECK_EQ(STATE_NONE, next_handshake_state_);
DCHECK(user_write_callback_.is_null());
DCHECK(user_connect_callback_.is_null());
DCHECK(!user_write_buf_);
DCHECK(nss_bufs_);
user_write_buf_ = buf;
user_write_buf_len_ = buf_len;
int rv = DoWriteLoop(OK);
if (rv == ERR_IO_PENDING) {
user_write_callback_ = callback;
} else {
user_write_buf_ = NULL;
user_write_buf_len_ = 0;
if (!OnNetworkTaskRunner()) {
PostOrRunCallback(FROM_HERE, base::Bind(callback, rv));
return ERR_IO_PENDING;
}
}
return rv;
}
bool SSLClientSocketNSS::Core::OnNSSTaskRunner() const {
return nss_task_runner_->RunsTasksOnCurrentThread();
}
bool SSLClientSocketNSS::Core::OnNetworkTaskRunner() const {
return network_task_runner_->RunsTasksOnCurrentThread();
}
// static
SECStatus SSLClientSocketNSS::Core::OwnAuthCertHandler(
void* arg,
PRFileDesc* socket,
PRBool checksig,
PRBool is_server) {
#ifdef SSL_ENABLE_FALSE_START
Core* core = reinterpret_cast<Core*>(arg);
if (!core->handshake_callback_called_) {
// Only need to turn off False Start in the initial handshake. Also, it is
// unsafe to call SSL_OptionSet in a renegotiation because the "first
// handshake" lock isn't already held, which will result in an assertion
// failure in the ssl_Get1stHandshakeLock call in SSL_OptionSet.
PRBool npn;
SECStatus rv = SSL_HandshakeNegotiatedExtension(socket,
ssl_next_proto_nego_xtn,
&npn);
if (rv != SECSuccess || !npn) {
// If the server doesn't support NPN, then we don't do False Start with
// it.
SSL_OptionSet(socket, SSL_ENABLE_FALSE_START, PR_FALSE);
}
}
#endif
// Tell NSS to not verify the certificate.
return SECSuccess;
}
#if defined(NSS_PLATFORM_CLIENT_AUTH)
// static
SECStatus SSLClientSocketNSS::Core::PlatformClientAuthHandler(
void* arg,
PRFileDesc* socket,
CERTDistNames* ca_names,
CERTCertList** result_certs,
void** result_private_key,
CERTCertificate** result_nss_certificate,
SECKEYPrivateKey** result_nss_private_key) {
Core* core = reinterpret_cast<Core*>(arg);
DCHECK(core->OnNSSTaskRunner());
core->PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEvent, core->weak_net_log_,
NetLog::TYPE_SSL_CLIENT_CERT_REQUESTED));
core->client_auth_cert_needed_ = !core->ssl_config_.send_client_cert;
#if defined(OS_WIN)
if (core->ssl_config_.send_client_cert) {
if (core->ssl_config_.client_cert) {
PCCERT_CONTEXT cert_context =
core->ssl_config_.client_cert->os_cert_handle();
HCRYPTPROV_OR_NCRYPT_KEY_HANDLE crypt_prov = 0;
DWORD key_spec = 0;
BOOL must_free = FALSE;
BOOL acquired_key = CryptAcquireCertificatePrivateKey(
cert_context, CRYPT_ACQUIRE_CACHE_FLAG, NULL,
&crypt_prov, &key_spec, &must_free);
if (acquired_key) {
// Since we passed CRYPT_ACQUIRE_CACHE_FLAG, |must_free| must be false
// according to the MSDN documentation.
CHECK_EQ(must_free, FALSE);
DCHECK_NE(key_spec, CERT_NCRYPT_KEY_SPEC);
SECItem der_cert;
der_cert.type = siDERCertBuffer;
der_cert.data = cert_context->pbCertEncoded;
der_cert.len = cert_context->cbCertEncoded;
// TODO(rsleevi): Error checking for NSS allocation errors.
CERTCertDBHandle* db_handle = CERT_GetDefaultCertDB();
CERTCertificate* user_cert = CERT_NewTempCertificate(
db_handle, &der_cert, NULL, PR_FALSE, PR_TRUE);
if (!user_cert) {
// Importing the certificate can fail for reasons including a serial
// number collision. See crbug.com/97355.
core->AddCertProvidedEvent(0);
return SECFailure;
}
CERTCertList* cert_chain = CERT_NewCertList();
CERT_AddCertToListTail(cert_chain, user_cert);
// Add the intermediates.
X509Certificate::OSCertHandles intermediates =
core->ssl_config_.client_cert->GetIntermediateCertificates();
for (X509Certificate::OSCertHandles::const_iterator it =
intermediates.begin(); it != intermediates.end(); ++it) {
der_cert.data = (*it)->pbCertEncoded;
der_cert.len = (*it)->cbCertEncoded;
CERTCertificate* intermediate = CERT_NewTempCertificate(
db_handle, &der_cert, NULL, PR_FALSE, PR_TRUE);
if (!intermediate) {
CERT_DestroyCertList(cert_chain);
core->AddCertProvidedEvent(0);
return SECFailure;
}
CERT_AddCertToListTail(cert_chain, intermediate);
}
PCERT_KEY_CONTEXT key_context = reinterpret_cast<PCERT_KEY_CONTEXT>(
PORT_ZAlloc(sizeof(CERT_KEY_CONTEXT)));
key_context->cbSize = sizeof(*key_context);
// NSS will free this context when no longer in use, but the
// |must_free| result from CryptAcquireCertificatePrivateKey was false
// so we increment the refcount to negate NSS's future decrement.
CryptContextAddRef(crypt_prov, NULL, 0);
key_context->hCryptProv = crypt_prov;
key_context->dwKeySpec = key_spec;
*result_private_key = key_context;
*result_certs = cert_chain;
int cert_count = 1 + intermediates.size();
core->AddCertProvidedEvent(cert_count);
return SECSuccess;
}
LOG(WARNING) << "Client cert found without private key";
}
// Send no client certificate.
core->AddCertProvidedEvent(0);
return SECFailure;
}
core->nss_handshake_state_.client_certs.clear();
std::vector<CERT_NAME_BLOB> issuer_list(ca_names->nnames);
for (int i = 0; i < ca_names->nnames; ++i) {
issuer_list[i].cbData = ca_names->names[i].len;
issuer_list[i].pbData = ca_names->names[i].data;
}
// Client certificates of the user are in the "MY" system certificate store.
HCERTSTORE my_cert_store = CertOpenSystemStore(NULL, L"MY");
if (!my_cert_store) {
PLOG(ERROR) << "Could not open the \"MY\" system certificate store";
core->AddCertProvidedEvent(0);
return SECFailure;
}
// Enumerate the client certificates.
CERT_CHAIN_FIND_BY_ISSUER_PARA find_by_issuer_para;
memset(&find_by_issuer_para, 0, sizeof(find_by_issuer_para));
find_by_issuer_para.cbSize = sizeof(find_by_issuer_para);
find_by_issuer_para.pszUsageIdentifier = szOID_PKIX_KP_CLIENT_AUTH;
find_by_issuer_para.cIssuer = ca_names->nnames;
find_by_issuer_para.rgIssuer = ca_names->nnames ? &issuer_list[0] : NULL;
find_by_issuer_para.pfnFindCallback = ClientCertFindCallback;
PCCERT_CHAIN_CONTEXT chain_context = NULL;
DWORD find_flags = CERT_CHAIN_FIND_BY_ISSUER_CACHE_ONLY_FLAG |
CERT_CHAIN_FIND_BY_ISSUER_CACHE_ONLY_URL_FLAG;
for (;;) {
// Find a certificate chain.
chain_context = CertFindChainInStore(my_cert_store,
X509_ASN_ENCODING,
find_flags,
CERT_CHAIN_FIND_BY_ISSUER,
&find_by_issuer_para,
chain_context);
if (!chain_context) {
DWORD err = GetLastError();
if (err != CRYPT_E_NOT_FOUND)
DLOG(ERROR) << "CertFindChainInStore failed: " << err;
break;
}
// Get the leaf certificate.
PCCERT_CONTEXT cert_context =
chain_context->rgpChain[0]->rgpElement[0]->pCertContext;
// Create a copy the handle, so that we can close the "MY" certificate store
// before returning from this function.
PCCERT_CONTEXT cert_context2;
BOOL ok = CertAddCertificateContextToStore(NULL, cert_context,
CERT_STORE_ADD_USE_EXISTING,
&cert_context2);
if (!ok) {
NOTREACHED();
continue;
}
// Copy the rest of the chain. Copying the chain stops gracefully if an
// error is encountered, with the partial chain being used as the
// intermediates, as opposed to failing to consider the client certificate
// at all.
net::X509Certificate::OSCertHandles intermediates;
for (DWORD i = 1; i < chain_context->rgpChain[0]->cElement; i++) {
PCCERT_CONTEXT intermediate_copy;
ok = CertAddCertificateContextToStore(
NULL, chain_context->rgpChain[0]->rgpElement[i]->pCertContext,
CERT_STORE_ADD_USE_EXISTING, &intermediate_copy);
if (!ok) {
NOTREACHED();
break;
}
intermediates.push_back(intermediate_copy);
}
scoped_refptr<X509Certificate> cert = X509Certificate::CreateFromHandle(
cert_context2, intermediates);
core->nss_handshake_state_.client_certs.push_back(cert);
X509Certificate::FreeOSCertHandle(cert_context2);
for (net::X509Certificate::OSCertHandles::iterator it =
intermediates.begin(); it != intermediates.end(); ++it) {
net::X509Certificate::FreeOSCertHandle(*it);
}
}
std::sort(core->nss_handshake_state_.client_certs.begin(),
core->nss_handshake_state_.client_certs.end(),
x509_util::ClientCertSorter());
BOOL ok = CertCloseStore(my_cert_store, CERT_CLOSE_STORE_CHECK_FLAG);
DCHECK(ok);
// Update the network task runner's view of the handshake state now that
// client certs have been detected.
core->PostOrRunCallback(
FROM_HERE, base::Bind(&Core::OnHandshakeStateUpdated, core,
core->nss_handshake_state_));
// Tell NSS to suspend the client authentication. We will then abort the
// handshake by returning ERR_SSL_CLIENT_AUTH_CERT_NEEDED.
return SECWouldBlock;
#elif defined(OS_MACOSX)
if (core->ssl_config_.send_client_cert) {
if (core->ssl_config_.client_cert) {
OSStatus os_error = noErr;
SecIdentityRef identity = NULL;
SecKeyRef private_key = NULL;
CFArrayRef chain =
core->ssl_config_.client_cert->CreateClientCertificateChain();
if (chain) {
identity = reinterpret_cast<SecIdentityRef>(
const_cast<void*>(CFArrayGetValueAtIndex(chain, 0)));
}
if (identity)
os_error = SecIdentityCopyPrivateKey(identity, &private_key);
if (chain && identity && os_error == noErr) {
// TODO(rsleevi): Error checking for NSS allocation errors.
*result_certs = CERT_NewCertList();
*result_private_key = private_key;
for (CFIndex i = 0; i < CFArrayGetCount(chain); ++i) {
CSSM_DATA cert_data;
SecCertificateRef cert_ref;
if (i == 0) {
cert_ref = core->ssl_config_.client_cert->os_cert_handle();
} else {
cert_ref = reinterpret_cast<SecCertificateRef>(
const_cast<void*>(CFArrayGetValueAtIndex(chain, i)));
}
os_error = SecCertificateGetData(cert_ref, &cert_data);
if (os_error != noErr)
break;
SECItem der_cert;
der_cert.type = siDERCertBuffer;
der_cert.data = cert_data.Data;
der_cert.len = cert_data.Length;
CERTCertificate* nss_cert = CERT_NewTempCertificate(
CERT_GetDefaultCertDB(), &der_cert, NULL, PR_FALSE, PR_TRUE);
if (!nss_cert) {
// In the event of an NSS error we make up an OS error and reuse
// the error handling, below.
os_error = errSecCreateChainFailed;
break;
}
CERT_AddCertToListTail(*result_certs, nss_cert);
}
}
if (os_error == noErr) {
int cert_count = 0;
if (chain) {
cert_count = CFArrayGetCount(chain);
CFRelease(chain);
}
core->AddCertProvidedEvent(cert_count);
return SECSuccess;
}
OSSTATUS_LOG(WARNING, os_error)
<< "Client cert found, but could not be used";
if (*result_certs) {
CERT_DestroyCertList(*result_certs);
*result_certs = NULL;
}
if (*result_private_key)
*result_private_key = NULL;
if (private_key)
CFRelease(private_key);
if (chain)
CFRelease(chain);
}
// Send no client certificate.
core->AddCertProvidedEvent(0);
return SECFailure;
}
core->nss_handshake_state_.client_certs.clear();
// First, get the cert issuer names allowed by the server.
std::vector<CertPrincipal> valid_issuers;
int n = ca_names->nnames;
for (int i = 0; i < n; i++) {
// Parse each name into a CertPrincipal object.
CertPrincipal p;
if (p.ParseDistinguishedName(ca_names->names[i].data,
ca_names->names[i].len)) {
valid_issuers.push_back(p);
}
}
// Now get the available client certs whose issuers are allowed by the server.
X509Certificate::GetSSLClientCertificates(
core->host_and_port_.host(), valid_issuers,
&core->nss_handshake_state_.client_certs);
std::sort(core->nss_handshake_state_.client_certs.begin(),
core->nss_handshake_state_.client_certs.end(),
x509_util::ClientCertSorter());
// Update the network task runner's view of the handshake state now that
// client certs have been detected.
core->PostOrRunCallback(
FROM_HERE, base::Bind(&Core::OnHandshakeStateUpdated, core,
core->nss_handshake_state_));
// Tell NSS to suspend the client authentication. We will then abort the
// handshake by returning ERR_SSL_CLIENT_AUTH_CERT_NEEDED.
return SECWouldBlock;
#else
return SECFailure;
#endif
}
#elif defined(OS_IOS)
SECStatus SSLClientSocketNSS::Core::ClientAuthHandler(
void* arg,
PRFileDesc* socket,
CERTDistNames* ca_names,
CERTCertificate** result_certificate,
SECKEYPrivateKey** result_private_key) {
Core* core = reinterpret_cast<Core*>(arg);
DCHECK(core->OnNSSTaskRunner());
core->PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEvent, core->weak_net_log_,
NetLog::TYPE_SSL_CLIENT_CERT_REQUESTED));
// TODO(droger): Support client auth on iOS. See http://crbug.com/145954).
LOG(WARNING) << "Client auth is not supported";
// Never send a certificate.
core->AddCertProvidedEvent(0);
return SECFailure;
}
#else // NSS_PLATFORM_CLIENT_AUTH
// static
// Based on Mozilla's NSS_GetClientAuthData.
SECStatus SSLClientSocketNSS::Core::ClientAuthHandler(
void* arg,
PRFileDesc* socket,
CERTDistNames* ca_names,
CERTCertificate** result_certificate,
SECKEYPrivateKey** result_private_key) {
Core* core = reinterpret_cast<Core*>(arg);
DCHECK(core->OnNSSTaskRunner());
core->PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEvent, core->weak_net_log_,
NetLog::TYPE_SSL_CLIENT_CERT_REQUESTED));
// Regular client certificate requested.
core->client_auth_cert_needed_ = !core->ssl_config_.send_client_cert;
void* wincx = SSL_RevealPinArg(socket);
// Second pass: a client certificate should have been selected.
if (core->ssl_config_.send_client_cert) {
if (core->ssl_config_.client_cert) {
CERTCertificate* cert = CERT_DupCertificate(
core->ssl_config_.client_cert->os_cert_handle());
SECKEYPrivateKey* privkey = PK11_FindKeyByAnyCert(cert, wincx);
if (privkey) {
// TODO(jsorianopastor): We should wait for server certificate
// verification before sending our credentials. See
// http://crbug.com/13934.
*result_certificate = cert;
*result_private_key = privkey;
// A cert_count of -1 means the number of certificates is unknown.
// NSS will construct the certificate chain.
core->AddCertProvidedEvent(-1);
return SECSuccess;
}
LOG(WARNING) << "Client cert found without private key";
}
// Send no client certificate.
core->AddCertProvidedEvent(0);
return SECFailure;
}
core->nss_handshake_state_.client_certs.clear();
// Iterate over all client certificates.
CERTCertList* client_certs = CERT_FindUserCertsByUsage(
CERT_GetDefaultCertDB(), certUsageSSLClient,
PR_FALSE, PR_FALSE, wincx);
if (client_certs) {
for (CERTCertListNode* node = CERT_LIST_HEAD(client_certs);
!CERT_LIST_END(node, client_certs);
node = CERT_LIST_NEXT(node)) {
// Only offer unexpired certificates.
if (CERT_CheckCertValidTimes(node->cert, PR_Now(), PR_TRUE) !=
secCertTimeValid) {
continue;
}
// Filter by issuer.
//
// TODO(davidben): This does a binary comparison of the DER-encoded
// issuers. We should match according to RFC 5280 sec. 7.1. We should find
// an appropriate NSS function or add one if needbe.
if (ca_names->nnames &&
NSS_CmpCertChainWCANames(node->cert, ca_names) != SECSuccess) {
continue;
}
X509Certificate* x509_cert = X509Certificate::CreateFromHandle(
node->cert, net::X509Certificate::OSCertHandles());
core->nss_handshake_state_.client_certs.push_back(x509_cert);
}
CERT_DestroyCertList(client_certs);
}
std::sort(core->nss_handshake_state_.client_certs.begin(),
core->nss_handshake_state_.client_certs.end(),
x509_util::ClientCertSorter());
// Update the network task runner's view of the handshake state now that
// client certs have been detected.
core->PostOrRunCallback(
FROM_HERE, base::Bind(&Core::OnHandshakeStateUpdated, core,
core->nss_handshake_state_));
// Tell NSS to suspend the client authentication. We will then abort the
// handshake by returning ERR_SSL_CLIENT_AUTH_CERT_NEEDED.
return SECWouldBlock;
}
#endif // NSS_PLATFORM_CLIENT_AUTH
// static
void SSLClientSocketNSS::Core::HandshakeCallback(
PRFileDesc* socket,
void* arg) {
Core* core = reinterpret_cast<Core*>(arg);
DCHECK(core->OnNSSTaskRunner());
core->handshake_callback_called_ = true;
HandshakeState* nss_state = &core->nss_handshake_state_;
PRBool last_handshake_resumed;
SECStatus rv = SSL_HandshakeResumedSession(socket, &last_handshake_resumed);
if (rv == SECSuccess && last_handshake_resumed) {
nss_state->resumed_handshake = true;
} else {
nss_state->resumed_handshake = false;
}
core->RecordChannelIDSupport();
core->UpdateServerCert();
core->UpdateConnectionStatus();
// Update the network task runners view of the handshake state whenever
// a handshake has completed.
core->PostOrRunCallback(
FROM_HERE, base::Bind(&Core::OnHandshakeStateUpdated, core,
*nss_state));
}
// static
SECStatus SSLClientSocketNSS::Core::NextProtoCallback(
void* arg,
PRFileDesc* nss_fd,
const unsigned char* protos,
unsigned int protos_len,
unsigned char* proto_out,
unsigned int* proto_out_len,
unsigned int proto_max_len) {
Core* core = reinterpret_cast<Core*>(arg);
DCHECK(core->OnNSSTaskRunner());
HandshakeState* nss_state = &core->nss_handshake_state_;
// For each protocol in server preference, see if we support it.
for (unsigned int i = 0; i < protos_len; ) {
const size_t len = protos[i];
for (std::vector<std::string>::const_iterator
j = core->ssl_config_.next_protos.begin();
j != core->ssl_config_.next_protos.end(); j++) {
// Having very long elements in the |next_protos| vector isn't a disaster
// because they'll never be selected, but it does indicate an error
// somewhere.
DCHECK_LT(j->size(), 256u);
if (j->size() == len &&
memcmp(&protos[i + 1], j->data(), len) == 0) {
nss_state->next_proto_status = kNextProtoNegotiated;
nss_state->next_proto = *j;
break;
}
}
if (nss_state->next_proto_status == kNextProtoNegotiated)
break;
// NSS ensures that the data in |protos| is well formed, so this will not
// cause a jump past the end of the buffer.
i += len + 1;
}
nss_state->server_protos.assign(
reinterpret_cast<const char*>(protos), protos_len);
// If we didn't find a protocol, we select the first one from our list.
if (nss_state->next_proto_status != kNextProtoNegotiated) {
nss_state->next_proto_status = kNextProtoNoOverlap;
nss_state->next_proto = core->ssl_config_.next_protos[0];
}
if (nss_state->next_proto.size() > proto_max_len) {
PORT_SetError(SEC_ERROR_OUTPUT_LEN);
return SECFailure;
}
memcpy(proto_out, nss_state->next_proto.data(),
nss_state->next_proto.size());
*proto_out_len = nss_state->next_proto.size();
// Update the network task runner's view of the handshake state now that
// NPN negotiation has occurred.
core->PostOrRunCallback(
FROM_HERE, base::Bind(&Core::OnHandshakeStateUpdated, core,
*nss_state));
return SECSuccess;
}
int SSLClientSocketNSS::Core::HandleNSSError(PRErrorCode nss_error,
bool handshake_error) {
DCHECK(OnNSSTaskRunner());
int net_error = handshake_error ? MapNSSClientHandshakeError(nss_error) :
MapNSSClientError(nss_error);
#if defined(OS_WIN)
// On Windows, a handle to the HCRYPTPROV is cached in the X509Certificate
// os_cert_handle() as an optimization. However, if the certificate
// private key is stored on a smart card, and the smart card is removed,
// the cached HCRYPTPROV will not be able to obtain the HCRYPTKEY again,
// preventing client certificate authentication. Because the
// X509Certificate may outlive the individual SSLClientSocketNSS, due to
// caching in X509Certificate, this failure ends up preventing client
// certificate authentication with the same certificate for all future
// attempts, even after the smart card has been re-inserted. By setting
// the CERT_KEY_PROV_HANDLE_PROP_ID to NULL, the cached HCRYPTPROV will
// typically be freed. This allows a new HCRYPTPROV to be obtained from
// the certificate on the next attempt, which should succeed if the smart
// card has been re-inserted, or will typically prompt the user to
// re-insert the smart card if not.
if ((net_error == ERR_SSL_CLIENT_AUTH_CERT_NO_PRIVATE_KEY ||
net_error == ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED) &&
ssl_config_.send_client_cert && ssl_config_.client_cert) {
CertSetCertificateContextProperty(
ssl_config_.client_cert->os_cert_handle(),
CERT_KEY_PROV_HANDLE_PROP_ID, 0, NULL);
}
#endif
return net_error;
}
int SSLClientSocketNSS::Core::DoHandshakeLoop(int last_io_result) {
DCHECK(OnNSSTaskRunner());
int rv = last_io_result;
do {
// Default to STATE_NONE for next state.
State state = next_handshake_state_;
GotoState(STATE_NONE);
switch (state) {
case STATE_HANDSHAKE:
rv = DoHandshake();
break;
case STATE_GET_DOMAIN_BOUND_CERT_COMPLETE:
rv = DoGetDBCertComplete(rv);
break;
case STATE_NONE:
default:
rv = ERR_UNEXPECTED;
LOG(DFATAL) << "unexpected state " << state;
break;
}
// Do the actual network I/O
bool network_moved = DoTransportIO();
if (network_moved && next_handshake_state_ == STATE_HANDSHAKE) {
// In general we exit the loop if rv is ERR_IO_PENDING. In this
// special case we keep looping even if rv is ERR_IO_PENDING because
// the transport IO may allow DoHandshake to make progress.
DCHECK(rv == OK || rv == ERR_IO_PENDING);
rv = OK; // This causes us to stay in the loop.
}
} while (rv != ERR_IO_PENDING && next_handshake_state_ != STATE_NONE);
return rv;
}
int SSLClientSocketNSS::Core::DoReadLoop(int result) {
DCHECK(OnNSSTaskRunner());
DCHECK(handshake_callback_called_);
DCHECK_EQ(STATE_NONE, next_handshake_state_);
if (result < 0)
return result;
if (!nss_bufs_) {
LOG(DFATAL) << "!nss_bufs_";
int rv = ERR_UNEXPECTED;
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_READ_ERROR,
CreateNetLogSSLErrorCallback(rv, 0)));
return rv;
}
bool network_moved;
int rv;
do {
rv = DoPayloadRead();
network_moved = DoTransportIO();
} while (rv == ERR_IO_PENDING && network_moved);
return rv;
}
int SSLClientSocketNSS::Core::DoWriteLoop(int result) {
DCHECK(OnNSSTaskRunner());
DCHECK(handshake_callback_called_);
DCHECK_EQ(STATE_NONE, next_handshake_state_);
if (result < 0)
return result;
if (!nss_bufs_) {
LOG(DFATAL) << "!nss_bufs_";
int rv = ERR_UNEXPECTED;
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_READ_ERROR,
CreateNetLogSSLErrorCallback(rv, 0)));
return rv;
}
bool network_moved;
int rv;
do {
rv = DoPayloadWrite();
network_moved = DoTransportIO();
} while (rv == ERR_IO_PENDING && network_moved);
LeaveFunction(rv);
return rv;
}
int SSLClientSocketNSS::Core::DoHandshake() {
DCHECK(OnNSSTaskRunner());
int net_error = net::OK;
SECStatus rv = SSL_ForceHandshake(nss_fd_);
// Note: this function may be called multiple times during the handshake, so
// even though channel id and client auth are separate else cases, they can
// both be used during a single SSL handshake.
if (channel_id_needed_) {
GotoState(STATE_GET_DOMAIN_BOUND_CERT_COMPLETE);
net_error = ERR_IO_PENDING;
} else if (client_auth_cert_needed_) {
net_error = ERR_SSL_CLIENT_AUTH_CERT_NEEDED;
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_HANDSHAKE_ERROR,
CreateNetLogSSLErrorCallback(net_error, 0)));
// If the handshake already succeeded (because the server requests but
// doesn't require a client cert), we need to invalidate the SSL session
// so that we won't try to resume the non-client-authenticated session in
// the next handshake. This will cause the server to ask for a client
// cert again.
if (rv == SECSuccess && SSL_InvalidateSession(nss_fd_) != SECSuccess)
LOG(WARNING) << "Couldn't invalidate SSL session: " << PR_GetError();
} else if (rv == SECSuccess) {
if (!handshake_callback_called_) {
// Workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=562434 -
// SSL_ForceHandshake returned SECSuccess prematurely.
rv = SECFailure;
net_error = ERR_SSL_PROTOCOL_ERROR;
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_HANDSHAKE_ERROR,
CreateNetLogSSLErrorCallback(net_error, 0)));
} else {
#if defined(SSL_ENABLE_OCSP_STAPLING)
// TODO(agl): figure out how to plumb an OCSP response into the Mac
// system library and update IsOCSPStaplingSupported for Mac.
if (IsOCSPStaplingSupported()) {
unsigned int len = 0;
SSL_GetStapledOCSPResponse(nss_fd_, NULL, &len);
if (len) {
const unsigned int orig_len = len;
scoped_array<uint8> ocsp_response(new uint8[orig_len]);
SSL_GetStapledOCSPResponse(nss_fd_, ocsp_response.get(), &len);
DCHECK_EQ(orig_len, len);
#if defined(OS_WIN)
if (nss_handshake_state_.server_cert) {
CRYPT_DATA_BLOB ocsp_response_blob;
ocsp_response_blob.cbData = len;
ocsp_response_blob.pbData = ocsp_response.get();
BOOL ok = CertSetCertificateContextProperty(
nss_handshake_state_.server_cert->os_cert_handle(),
CERT_OCSP_RESPONSE_PROP_ID,
CERT_SET_PROPERTY_IGNORE_PERSIST_ERROR_FLAG,
&ocsp_response_blob);
if (!ok) {
VLOG(1) << "Failed to set OCSP response property: "
<< GetLastError();
}
}
#elif defined(USE_NSS)
CacheOCSPResponseFromSideChannelFunction cache_ocsp_response =
GetCacheOCSPResponseFromSideChannelFunction();
SECItem ocsp_response_item;
ocsp_response_item.type = siBuffer;
ocsp_response_item.data = ocsp_response.get();
ocsp_response_item.len = len;
cache_ocsp_response(
CERT_GetDefaultCertDB(),
nss_handshake_state_.server_cert_chain[0], PR_Now(),
&ocsp_response_item, NULL);
#endif
}
}
#endif
}
// Done!
} else {
PRErrorCode prerr = PR_GetError();
net_error = HandleNSSError(prerr, true);
// Some network devices that inspect application-layer packets seem to
// inject TCP reset packets to break the connections when they see
// TLS 1.1 in ClientHello or ServerHello. See http://crbug.com/130293.
//
// Only allow ERR_CONNECTION_RESET to trigger a TLS 1.1 -> TLS 1.0
// fallback. We don't lose much in this fallback because the explicit
// IV for CBC mode in TLS 1.1 is approximated by record splitting in
// TLS 1.0.
//
// ERR_CONNECTION_RESET is a common network error, so we don't want it
// to trigger a version fallback in general, especially the TLS 1.0 ->
// SSL 3.0 fallback, which would drop TLS extensions.
if (prerr == PR_CONNECT_RESET_ERROR &&
ssl_config_.version_max == SSL_PROTOCOL_VERSION_TLS1_1) {
net_error = ERR_SSL_PROTOCOL_ERROR;
}
// If not done, stay in this state
if (net_error == ERR_IO_PENDING) {
GotoState(STATE_HANDSHAKE);
} else {
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_HANDSHAKE_ERROR,
CreateNetLogSSLErrorCallback(net_error, prerr)));
}
}
return net_error;
}
int SSLClientSocketNSS::Core::DoGetDBCertComplete(int result) {
SECStatus rv;
PostOrRunCallback(
FROM_HERE,
base::Bind(&BoundNetLog::EndEventWithNetErrorCode, weak_net_log_,
NetLog::TYPE_SSL_GET_DOMAIN_BOUND_CERT, result));
channel_id_needed_ = false;
if (result != OK)
return result;
SECKEYPublicKey* public_key;
SECKEYPrivateKey* private_key;
int error = ImportChannelIDKeys(&public_key, &private_key);
if (error != OK)
return error;
rv = SSL_RestartHandshakeAfterChannelIDReq(nss_fd_, public_key, private_key);
if (rv != SECSuccess)
return MapNSSError(PORT_GetError());
SetChannelIDProvided();
GotoState(STATE_HANDSHAKE);
return OK;
}
int SSLClientSocketNSS::Core::DoPayloadRead() {
DCHECK(OnNSSTaskRunner());
DCHECK(user_read_buf_);
DCHECK_GT(user_read_buf_len_, 0);
int rv = PR_Read(nss_fd_, user_read_buf_->data(), user_read_buf_len_);
if (client_auth_cert_needed_) {
// We don't need to invalidate the non-client-authenticated SSL session
// because the server will renegotiate anyway.
rv = ERR_SSL_CLIENT_AUTH_CERT_NEEDED;
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_READ_ERROR,
CreateNetLogSSLErrorCallback(rv, 0)));
return rv;
}
if (rv >= 0) {
PostOrRunCallback(
FROM_HERE,
base::Bind(&LogByteTransferEvent, weak_net_log_,
NetLog::TYPE_SSL_SOCKET_BYTES_RECEIVED, rv,
scoped_refptr<IOBuffer>(user_read_buf_)));
return rv;
}
PRErrorCode prerr = PR_GetError();
if (prerr == PR_WOULD_BLOCK_ERROR)
return ERR_IO_PENDING;
rv = HandleNSSError(prerr, false);
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_READ_ERROR,
CreateNetLogSSLErrorCallback(rv, prerr)));
return rv;
}
int SSLClientSocketNSS::Core::DoPayloadWrite() {
DCHECK(OnNSSTaskRunner());
DCHECK(user_write_buf_);
int rv = PR_Write(nss_fd_, user_write_buf_->data(), user_write_buf_len_);
if (rv >= 0) {
PostOrRunCallback(
FROM_HERE,
base::Bind(&LogByteTransferEvent, weak_net_log_,
NetLog::TYPE_SSL_SOCKET_BYTES_SENT, rv,
scoped_refptr<IOBuffer>(user_write_buf_)));
return rv;
}
PRErrorCode prerr = PR_GetError();
if (prerr == PR_WOULD_BLOCK_ERROR)
return ERR_IO_PENDING;
rv = HandleNSSError(prerr, false);
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_WRITE_ERROR,
CreateNetLogSSLErrorCallback(rv, prerr)));
return rv;
}
// Do as much network I/O as possible between the buffer and the
// transport socket. Return true if some I/O performed, false
// otherwise (error or ERR_IO_PENDING).
bool SSLClientSocketNSS::Core::DoTransportIO() {
DCHECK(OnNSSTaskRunner());
bool network_moved = false;
if (nss_bufs_ != NULL) {
int rv;
// Read and write as much data as we can. The loop is neccessary
// because Write() may return synchronously.
do {
rv = BufferSend();
if (rv != ERR_IO_PENDING && rv != 0)
network_moved = true;
} while (rv > 0);
if (!transport_recv_eof_ && BufferRecv() != ERR_IO_PENDING)
network_moved = true;
}
return network_moved;
}
int SSLClientSocketNSS::Core::BufferRecv() {
DCHECK(OnNSSTaskRunner());
if (transport_recv_busy_)
return ERR_IO_PENDING;
char* buf;
int nb = memio_GetReadParams(nss_bufs_, &buf);
int rv;
if (!nb) {
// buffer too full to read into, so no I/O possible at moment
rv = ERR_IO_PENDING;
} else {
scoped_refptr<IOBuffer> read_buffer(new IOBuffer(nb));
if (OnNetworkTaskRunner()) {
rv = DoBufferRecv(read_buffer, nb);
} else {
bool posted = network_task_runner_->PostTask(
FROM_HERE,
base::Bind(IgnoreResult(&Core::DoBufferRecv), this, read_buffer,
nb));
rv = posted ? ERR_IO_PENDING : ERR_ABORTED;
}
if (rv == ERR_IO_PENDING) {
transport_recv_busy_ = true;
} else {
if (rv > 0) {
memcpy(buf, read_buffer->data(), rv);
} else if (rv == 0) {
transport_recv_eof_ = true;
}
memio_PutReadResult(nss_bufs_, MapErrorToNSS(rv));
}
}
return rv;
}
// Return 0 if nss_bufs_ was empty,
// > 0 for bytes transferred immediately,
// < 0 for error (or the non-error ERR_IO_PENDING).
int SSLClientSocketNSS::Core::BufferSend() {
DCHECK(OnNSSTaskRunner());
if (transport_send_busy_)
return ERR_IO_PENDING;
const char* buf1;
const char* buf2;
unsigned int len1, len2;
memio_GetWriteParams(nss_bufs_, &buf1, &len1, &buf2, &len2);
const unsigned int len = len1 + len2;
int rv = 0;
if (len) {
scoped_refptr<IOBuffer> send_buffer(new IOBuffer(len));
memcpy(send_buffer->data(), buf1, len1);
memcpy(send_buffer->data() + len1, buf2, len2);
if (OnNetworkTaskRunner()) {
rv = DoBufferSend(send_buffer, len);
} else {
bool posted = network_task_runner_->PostTask(
FROM_HERE,
base::Bind(IgnoreResult(&Core::DoBufferSend), this, send_buffer,
len));
rv = posted ? ERR_IO_PENDING : ERR_ABORTED;
}
if (rv == ERR_IO_PENDING) {
transport_send_busy_ = true;
} else {
memio_PutWriteResult(nss_bufs_, MapErrorToNSS(rv));
}
}
return rv;
}
void SSLClientSocketNSS::Core::OnRecvComplete(int result) {
DCHECK(OnNSSTaskRunner());
if (next_handshake_state_ == STATE_HANDSHAKE) {
OnHandshakeIOComplete(result);
return;
}
// Network layer received some data, check if client requested to read
// decrypted data.
if (!user_read_buf_)
return;
int rv = DoReadLoop(result);
if (rv != ERR_IO_PENDING)
DoReadCallback(rv);
}
void SSLClientSocketNSS::Core::OnSendComplete(int result) {
DCHECK(OnNSSTaskRunner());
if (next_handshake_state_ == STATE_HANDSHAKE) {
OnHandshakeIOComplete(result);
return;
}
// OnSendComplete may need to call DoPayloadRead while the renegotiation
// handshake is in progress.
int rv_read = ERR_IO_PENDING;
int rv_write = ERR_IO_PENDING;
bool network_moved;
do {
if (user_read_buf_)
rv_read = DoPayloadRead();
if (user_write_buf_)
rv_write = DoPayloadWrite();
network_moved = DoTransportIO();
} while (rv_read == ERR_IO_PENDING &&
rv_write == ERR_IO_PENDING &&
(user_read_buf_ || user_write_buf_) &&
network_moved);
// If the parent SSLClientSocketNSS is deleted during the processing of the
// Read callback and OnNSSTaskRunner() == OnNetworkTaskRunner(), then the Core
// will be detached (and possibly deleted). Guard against deletion by taking
// an extra reference, then check if the Core was detached before invoking the
// next callback.
scoped_refptr<Core> guard(this);
if (user_read_buf_ && rv_read != ERR_IO_PENDING)
DoReadCallback(rv_read);
if (OnNetworkTaskRunner() && detached_)
return;
if (user_write_buf_ && rv_write != ERR_IO_PENDING)
DoWriteCallback(rv_write);
}
// As part of Connect(), the SSLClientSocketNSS object performs an SSL
// handshake. This requires network IO, which in turn calls
// BufferRecvComplete() with a non-zero byte count. This byte count eventually
// winds its way through the state machine and ends up being passed to the
// callback. For Read() and Write(), that's what we want. But for Connect(),
// the caller expects OK (i.e. 0) for success.
void SSLClientSocketNSS::Core::DoConnectCallback(int rv) {
DCHECK(OnNSSTaskRunner());
DCHECK_NE(rv, ERR_IO_PENDING);
DCHECK(!user_connect_callback_.is_null());
base::Closure c = base::Bind(
base::ResetAndReturn(&user_connect_callback_),
rv > OK ? OK : rv);
PostOrRunCallback(FROM_HERE, c);
}
void SSLClientSocketNSS::Core::DoReadCallback(int rv) {
DCHECK(OnNSSTaskRunner());
DCHECK_NE(ERR_IO_PENDING, rv);
DCHECK(!user_read_callback_.is_null());
user_read_buf_ = NULL;
user_read_buf_len_ = 0;
base::Closure c = base::Bind(
base::ResetAndReturn(&user_read_callback_),
rv);
PostOrRunCallback(FROM_HERE, c);
}
void SSLClientSocketNSS::Core::DoWriteCallback(int rv) {
DCHECK(OnNSSTaskRunner());
DCHECK_NE(ERR_IO_PENDING, rv);
DCHECK(!user_write_callback_.is_null());
// Since Run may result in Write being called, clear |user_write_callback_|
// up front.
user_write_buf_ = NULL;
user_write_buf_len_ = 0;
base::Closure c = base::Bind(
base::ResetAndReturn(&user_write_callback_),
rv);
PostOrRunCallback(FROM_HERE, c);
}
SECStatus SSLClientSocketNSS::Core::ClientChannelIDHandler(
void* arg,
PRFileDesc* socket,
SECKEYPublicKey **out_public_key,
SECKEYPrivateKey **out_private_key) {
Core* core = reinterpret_cast<Core*>(arg);
DCHECK(core->OnNSSTaskRunner());
core->PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEvent, core->weak_net_log_,
NetLog::TYPE_SSL_CHANNEL_ID_REQUESTED));
// We have negotiated the TLS channel ID extension.
core->channel_id_xtn_negotiated_ = true;
std::string origin = "https://" + core->host_and_port_.ToString();
std::vector<uint8> requested_cert_types;
requested_cert_types.push_back(CLIENT_CERT_ECDSA_SIGN);
int error = ERR_UNEXPECTED;
if (core->OnNetworkTaskRunner()) {
error = core->DoGetDomainBoundCert(origin, requested_cert_types);
} else {
bool posted = core->network_task_runner_->PostTask(
FROM_HERE,
base::Bind(
IgnoreResult(&Core::DoGetDomainBoundCert),
core, origin, requested_cert_types));
error = posted ? ERR_IO_PENDING : ERR_ABORTED;
}
if (error == ERR_IO_PENDING) {
// Asynchronous case.
core->channel_id_needed_ = true;
return SECWouldBlock;
}
core->PostOrRunCallback(
FROM_HERE,
base::Bind(&BoundNetLog::EndEventWithNetErrorCode, core->weak_net_log_,
NetLog::TYPE_SSL_GET_DOMAIN_BOUND_CERT, error));
SECStatus rv = SECSuccess;
if (error == OK) {
// Synchronous success.
int result = core->ImportChannelIDKeys(out_public_key, out_private_key);
if (result == OK)
core->SetChannelIDProvided();
else
rv = SECFailure;
} else {
rv = SECFailure;
}
return rv;
}
int SSLClientSocketNSS::Core::ImportChannelIDKeys(SECKEYPublicKey** public_key,
SECKEYPrivateKey** key) {
// Set the certificate.
SECItem cert_item;
cert_item.data = (unsigned char*) domain_bound_cert_.data();
cert_item.len = domain_bound_cert_.size();
ScopedCERTCertificate cert(CERT_NewTempCertificate(CERT_GetDefaultCertDB(),
&cert_item,
NULL,
PR_FALSE,
PR_TRUE));
if (cert == NULL)
return MapNSSError(PORT_GetError());
// Set the private key.
switch (domain_bound_cert_type_) {
case CLIENT_CERT_ECDSA_SIGN: {
if (!crypto::ECPrivateKey::ImportFromEncryptedPrivateKeyInfo(
ServerBoundCertService::kEPKIPassword,
reinterpret_cast<const unsigned char*>(
domain_bound_private_key_.data()),
domain_bound_private_key_.size(),
&cert->subjectPublicKeyInfo,
false,
false,
key,
public_key)) {
int error = MapNSSError(PORT_GetError());
return error;
}
break;
}
default:
NOTREACHED();
return ERR_INVALID_ARGUMENT;
}
return OK;
}
void SSLClientSocketNSS::Core::UpdateServerCert() {
nss_handshake_state_.server_cert_chain.Reset(nss_fd_);
nss_handshake_state_.server_cert = X509Certificate::CreateFromDERCertChain(
nss_handshake_state_.server_cert_chain.AsStringPieceVector());
if (nss_handshake_state_.server_cert) {
// Since this will be called asynchronously on another thread, it needs to
// own a reference to the certificate.
NetLog::ParametersCallback net_log_callback =
base::Bind(&NetLogX509CertificateCallback,
nss_handshake_state_.server_cert);
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_CERTIFICATES_RECEIVED,
net_log_callback));
}
}
void SSLClientSocketNSS::Core::UpdateConnectionStatus() {
SSLChannelInfo channel_info;
SECStatus ok = SSL_GetChannelInfo(nss_fd_,
&channel_info, sizeof(channel_info));
if (ok == SECSuccess &&
channel_info.length == sizeof(channel_info) &&
channel_info.cipherSuite) {
nss_handshake_state_.ssl_connection_status |=
(static_cast<int>(channel_info.cipherSuite) &
SSL_CONNECTION_CIPHERSUITE_MASK) <<
SSL_CONNECTION_CIPHERSUITE_SHIFT;
nss_handshake_state_.ssl_connection_status |=
(static_cast<int>(channel_info.compressionMethod) &
SSL_CONNECTION_COMPRESSION_MASK) <<
SSL_CONNECTION_COMPRESSION_SHIFT;
// NSS 3.12.x doesn't have version macros for TLS 1.1 and 1.2 (because NSS
// doesn't support them yet), so we use 0x0302 and 0x0303 directly.
int version = SSL_CONNECTION_VERSION_UNKNOWN;
if (channel_info.protocolVersion < SSL_LIBRARY_VERSION_3_0) {
// All versions less than SSL_LIBRARY_VERSION_3_0 are treated as SSL
// version 2.
version = SSL_CONNECTION_VERSION_SSL2;
} else if (channel_info.protocolVersion == SSL_LIBRARY_VERSION_3_0) {
version = SSL_CONNECTION_VERSION_SSL3;
} else if (channel_info.protocolVersion == SSL_LIBRARY_VERSION_3_1_TLS) {
version = SSL_CONNECTION_VERSION_TLS1;
} else if (channel_info.protocolVersion == 0x0302) {
version = SSL_CONNECTION_VERSION_TLS1_1;
} else if (channel_info.protocolVersion == 0x0303) {
version = SSL_CONNECTION_VERSION_TLS1_2;
}
nss_handshake_state_.ssl_connection_status |=
(version & SSL_CONNECTION_VERSION_MASK) <<
SSL_CONNECTION_VERSION_SHIFT;
}
// SSL_HandshakeNegotiatedExtension was added in NSS 3.12.6.
// Since SSL_MAX_EXTENSIONS was added at the same time, we can test
// SSL_MAX_EXTENSIONS for the presence of SSL_HandshakeNegotiatedExtension.
#if defined(SSL_MAX_EXTENSIONS)
PRBool peer_supports_renego_ext;
ok = SSL_HandshakeNegotiatedExtension(nss_fd_, ssl_renegotiation_info_xtn,
&peer_supports_renego_ext);
if (ok == SECSuccess) {
if (!peer_supports_renego_ext) {
nss_handshake_state_.ssl_connection_status |=
SSL_CONNECTION_NO_RENEGOTIATION_EXTENSION;
// Log an informational message if the server does not support secure
// renegotiation (RFC 5746).
VLOG(1) << "The server " << host_and_port_.ToString()
<< " does not support the TLS renegotiation_info extension.";
}
UMA_HISTOGRAM_ENUMERATION("Net.RenegotiationExtensionSupported",
peer_supports_renego_ext, 2);
// We would like to eliminate fallback to SSLv3 for non-buggy servers
// because of security concerns. For example, Google offers forward
// secrecy with ECDHE but that requires TLS 1.0. An attacker can block
// TLSv1 connections and force us to downgrade to SSLv3 and remove forward
// secrecy.
//
// Yngve from Opera has suggested using the renegotiation extension as an
// indicator that SSLv3 fallback was mistaken:
// tools.ietf.org/html/draft-pettersen-tls-version-rollback-removal-00 .
//
// As a first step, measure how often clients perform version fallback
// while the server advertises support secure renegotiation.
if (ssl_config_.version_fallback &&
channel_info.protocolVersion == SSL_LIBRARY_VERSION_3_0) {
UMA_HISTOGRAM_BOOLEAN("Net.SSLv3FallbackToRenegoPatchedServer",
peer_supports_renego_ext == PR_TRUE);
}
}
#endif
if (ssl_config_.version_fallback) {
nss_handshake_state_.ssl_connection_status |=
SSL_CONNECTION_VERSION_FALLBACK;
}
}
void SSLClientSocketNSS::Core::RecordChannelIDSupport() const {
if (nss_handshake_state_.resumed_handshake)
return;
// Since this enum is used for a histogram, do not change or re-use values.
enum {
DISABLED = 0,
CLIENT_ONLY = 1,
CLIENT_AND_SERVER = 2,
CLIENT_NO_ECC = 3,
CLIENT_BAD_SYSTEM_TIME = 4,
CLIENT_NO_SERVER_BOUND_CERT_SERVICE = 5,
DOMAIN_BOUND_CERT_USAGE_MAX
} supported = DISABLED;
if (channel_id_xtn_negotiated_) {
supported = CLIENT_AND_SERVER;
} else if (ssl_config_.channel_id_enabled) {
if (!server_bound_cert_service_)
supported = CLIENT_NO_SERVER_BOUND_CERT_SERVICE;
else if (!crypto::ECPrivateKey::IsSupported())
supported = CLIENT_NO_ECC;
else if (!server_bound_cert_service_->IsSystemTimeValid())
supported = CLIENT_BAD_SYSTEM_TIME;
else
supported = CLIENT_ONLY;
}
UMA_HISTOGRAM_ENUMERATION("DomainBoundCerts.Support", supported,
DOMAIN_BOUND_CERT_USAGE_MAX);
}
int SSLClientSocketNSS::Core::DoBufferRecv(IOBuffer* read_buffer, int len) {
DCHECK(OnNetworkTaskRunner());
DCHECK_GT(len, 0);
if (detached_)
return ERR_ABORTED;
int rv = transport_->socket()->Read(
read_buffer, len,
base::Bind(&Core::BufferRecvComplete, base::Unretained(this),
scoped_refptr<IOBuffer>(read_buffer)));
if (!OnNSSTaskRunner() && rv != ERR_IO_PENDING) {
nss_task_runner_->PostTask(
FROM_HERE, base::Bind(&Core::BufferRecvComplete, this,
scoped_refptr<IOBuffer>(read_buffer), rv));
return rv;
}
return rv;
}
int SSLClientSocketNSS::Core::DoBufferSend(IOBuffer* send_buffer, int len) {
DCHECK(OnNetworkTaskRunner());
DCHECK_GT(len, 0);
if (detached_)
return ERR_ABORTED;
int rv = transport_->socket()->Write(
send_buffer, len,
base::Bind(&Core::BufferSendComplete,
base::Unretained(this)));
if (!OnNSSTaskRunner() && rv != ERR_IO_PENDING) {
nss_task_runner_->PostTask(
FROM_HERE,
base::Bind(&Core::BufferSendComplete, this, rv));
return rv;
}
return rv;
}
int SSLClientSocketNSS::Core::DoGetDomainBoundCert(
const std::string& origin,
const std::vector<uint8>& requested_cert_types) {
DCHECK(OnNetworkTaskRunner());
if (detached_)
return ERR_FAILED;
weak_net_log_->BeginEvent(NetLog::TYPE_SSL_GET_DOMAIN_BOUND_CERT);
int rv = server_bound_cert_service_->GetDomainBoundCert(
origin,
requested_cert_types,
&domain_bound_cert_type_,
&domain_bound_private_key_,
&domain_bound_cert_,
base::Bind(&Core::OnGetDomainBoundCertComplete, base::Unretained(this)),
&domain_bound_cert_request_handle_);
if (rv != ERR_IO_PENDING && !OnNSSTaskRunner()) {
nss_task_runner_->PostTask(
FROM_HERE,
base::Bind(&Core::OnHandshakeIOComplete, this, rv));
return ERR_IO_PENDING;
}
return rv;
}
void SSLClientSocketNSS::Core::OnHandshakeStateUpdated(
const HandshakeState& state) {
network_handshake_state_ = state;
}
void SSLClientSocketNSS::Core::BufferSendComplete(int result) {
if (!OnNSSTaskRunner()) {
if (detached_)
return;
nss_task_runner_->PostTask(
FROM_HERE, base::Bind(&Core::BufferSendComplete, this, result));
return;
}
DCHECK(OnNSSTaskRunner());
memio_PutWriteResult(nss_bufs_, MapErrorToNSS(result));
transport_send_busy_ = false;
OnSendComplete(result);
}
void SSLClientSocketNSS::Core::OnHandshakeIOComplete(int result) {
if (!OnNSSTaskRunner()) {
if (detached_)
return;
nss_task_runner_->PostTask(
FROM_HERE, base::Bind(&Core::OnHandshakeIOComplete, this, result));
return;
}
DCHECK(OnNSSTaskRunner());
int rv = DoHandshakeLoop(result);
if (rv != ERR_IO_PENDING)
DoConnectCallback(rv);
}
void SSLClientSocketNSS::Core::OnGetDomainBoundCertComplete(int result) {
DVLOG(1) << __FUNCTION__ << " " << result;
DCHECK(OnNetworkTaskRunner());
domain_bound_cert_request_handle_ = NULL;
OnHandshakeIOComplete(result);
}
void SSLClientSocketNSS::Core::BufferRecvComplete(
IOBuffer* read_buffer,
int result) {
DCHECK(read_buffer);
if (!OnNSSTaskRunner()) {
if (detached_)
return;
nss_task_runner_->PostTask(
FROM_HERE, base::Bind(&Core::BufferRecvComplete, this,
scoped_refptr<IOBuffer>(read_buffer), result));
return;
}
DCHECK(OnNSSTaskRunner());
if (result > 0) {
char* buf;
int nb = memio_GetReadParams(nss_bufs_, &buf);
CHECK_GE(nb, result);
memcpy(buf, read_buffer->data(), result);
} else if (result == 0) {
transport_recv_eof_ = true;
}
memio_PutReadResult(nss_bufs_, MapErrorToNSS(result));
transport_recv_busy_ = false;
OnRecvComplete(result);
}
void SSLClientSocketNSS::Core::PostOrRunCallback(
const tracked_objects::Location& location,
const base::Closure& task) {
if (!OnNetworkTaskRunner()) {
network_task_runner_->PostTask(
FROM_HERE,
base::Bind(&Core::PostOrRunCallback, this, location, task));
return;
}
if (detached_ || task.is_null())
return;
task.Run();
}
void SSLClientSocketNSS::Core::AddCertProvidedEvent(int cert_count) {
PostOrRunCallback(
FROM_HERE,
base::Bind(&AddLogEventWithCallback, weak_net_log_,
NetLog::TYPE_SSL_CLIENT_CERT_PROVIDED,
NetLog::IntegerCallback("cert_count", cert_count)));
}
void SSLClientSocketNSS::Core::SetChannelIDProvided() {
PostOrRunCallback(
FROM_HERE, base::Bind(&AddLogEvent, weak_net_log_,
NetLog::TYPE_SSL_CHANNEL_ID_PROVIDED));
nss_handshake_state_.channel_id_sent = true;
// Update the network task runner's view of the handshake state now that
// channel id has been sent.
PostOrRunCallback(
FROM_HERE, base::Bind(&Core::OnHandshakeStateUpdated, this,
nss_handshake_state_));
}
SSLClientSocketNSS::SSLClientSocketNSS(
base::SequencedTaskRunner* nss_task_runner,
ClientSocketHandle* transport_socket,
const HostPortPair& host_and_port,
const SSLConfig& ssl_config,
const SSLClientSocketContext& context)
: nss_task_runner_(nss_task_runner),
transport_(transport_socket),
host_and_port_(host_and_port),
ssl_config_(ssl_config),
cert_verifier_(context.cert_verifier),
server_bound_cert_service_(context.server_bound_cert_service),
ssl_session_cache_shard_(context.ssl_session_cache_shard),
completed_handshake_(false),
next_handshake_state_(STATE_NONE),
nss_fd_(NULL),
net_log_(transport_socket->socket()->NetLog()),
transport_security_state_(context.transport_security_state),
valid_thread_id_(base::kInvalidThreadId) {
EnterFunction("");
InitCore();
LeaveFunction("");
}
SSLClientSocketNSS::~SSLClientSocketNSS() {
EnterFunction("");
Disconnect();
LeaveFunction("");
}
// static
void SSLClientSocket::ClearSessionCache() {
// SSL_ClearSessionCache can't be called before NSS is initialized. Don't
// bother initializing NSS just to clear an empty SSL session cache.
if (!NSS_IsInitialized())
return;
SSL_ClearSessionCache();
}
bool SSLClientSocketNSS::GetSSLInfo(SSLInfo* ssl_info) {
EnterFunction("");
ssl_info->Reset();
if (core_->state().server_cert_chain.empty() ||
!core_->state().server_cert_chain[0]) {
return false;
}
ssl_info->cert_status = server_cert_verify_result_.cert_status;
ssl_info->cert = server_cert_verify_result_.verified_cert;
ssl_info->connection_status =
core_->state().ssl_connection_status;
ssl_info->public_key_hashes = server_cert_verify_result_.public_key_hashes;
for (HashValueVector::const_iterator i = side_pinned_public_keys_.begin();
i != side_pinned_public_keys_.end(); ++i) {
ssl_info->public_key_hashes.push_back(*i);
}
ssl_info->is_issued_by_known_root =
server_cert_verify_result_.is_issued_by_known_root;
ssl_info->client_cert_sent =
ssl_config_.send_client_cert && ssl_config_.client_cert;
ssl_info->channel_id_sent = WasChannelIDSent();
PRUint16 cipher_suite = SSLConnectionStatusToCipherSuite(
core_->state().ssl_connection_status);
SSLCipherSuiteInfo cipher_info;
SECStatus ok = SSL_GetCipherSuiteInfo(cipher_suite,
&cipher_info, sizeof(cipher_info));
if (ok == SECSuccess) {
ssl_info->security_bits = cipher_info.effectiveKeyBits;
} else {
ssl_info->security_bits = -1;
LOG(DFATAL) << "SSL_GetCipherSuiteInfo returned " << PR_GetError()
<< " for cipherSuite " << cipher_suite;
}
ssl_info->handshake_type = core_->state().resumed_handshake ?
SSLInfo::HANDSHAKE_RESUME : SSLInfo::HANDSHAKE_FULL;
LeaveFunction("");
return true;
}
void SSLClientSocketNSS::GetSSLCertRequestInfo(
SSLCertRequestInfo* cert_request_info) {
EnterFunction("");
// TODO(rch): switch SSLCertRequestInfo.host_and_port to a HostPortPair
cert_request_info->host_and_port = host_and_port_.ToString();
cert_request_info->client_certs = core_->state().client_certs;
LeaveFunction(cert_request_info->client_certs.size());
}
int SSLClientSocketNSS::ExportKeyingMaterial(const base::StringPiece& label,
bool has_context,
const base::StringPiece& context,
unsigned char* out,
unsigned int outlen) {
if (!IsConnected())
return ERR_SOCKET_NOT_CONNECTED;
// SSL_ExportKeyingMaterial may block the current thread if |core_| is in
// the midst of a handshake.
SECStatus result = SSL_ExportKeyingMaterial(
nss_fd_, label.data(), label.size(), has_context,
reinterpret_cast<const unsigned char*>(context.data()),
context.length(), out, outlen);
if (result != SECSuccess) {
LogFailedNSSFunction(net_log_, "SSL_ExportKeyingMaterial", "");
return MapNSSError(PORT_GetError());
}
return OK;
}
int SSLClientSocketNSS::GetTLSUniqueChannelBinding(std::string* out) {
if (!IsConnected())
return ERR_SOCKET_NOT_CONNECTED;
unsigned char buf[64];
unsigned int len;
SECStatus result = SSL_GetChannelBinding(nss_fd_,
SSL_CHANNEL_BINDING_TLS_UNIQUE,
buf, &len, arraysize(buf));
if (result != SECSuccess) {
LogFailedNSSFunction(net_log_, "SSL_GetChannelBinding", "");
return MapNSSError(PORT_GetError());
}
out->assign(reinterpret_cast<char*>(buf), len);
return OK;
}
SSLClientSocket::NextProtoStatus
SSLClientSocketNSS::GetNextProto(std::string* proto,
std::string* server_protos) {
*proto = core_->state().next_proto;
*server_protos = core_->state().server_protos;
return core_->state().next_proto_status;
}
int SSLClientSocketNSS::Connect(const CompletionCallback& callback) {
EnterFunction("");
DCHECK(transport_.get());
DCHECK_EQ(STATE_NONE, next_handshake_state_);
DCHECK(user_connect_callback_.is_null());
DCHECK(!callback.is_null());
EnsureThreadIdAssigned();
net_log_.BeginEvent(NetLog::TYPE_SSL_CONNECT);
int rv = Init();
if (rv != OK) {
net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_CONNECT, rv);
return rv;
}
rv = InitializeSSLOptions();
if (rv != OK) {
net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_CONNECT, rv);
return rv;
}
rv = InitializeSSLPeerName();
if (rv != OK) {
net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_CONNECT, rv);
return rv;
}
GotoState(STATE_HANDSHAKE);
rv = DoHandshakeLoop(OK);
if (rv == ERR_IO_PENDING) {
user_connect_callback_ = callback;
} else {
net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_CONNECT, rv);
}
LeaveFunction("");
return rv > OK ? OK : rv;
}
void SSLClientSocketNSS::Disconnect() {
EnterFunction("");
CHECK(CalledOnValidThread());
// Shut down anything that may call us back.
core_->Detach();
verifier_.reset();
transport_->socket()->Disconnect();
// Reset object state.
user_connect_callback_.Reset();
server_cert_verify_result_.Reset();
completed_handshake_ = false;
start_cert_verification_time_ = base::TimeTicks();
InitCore();
LeaveFunction("");
}
bool SSLClientSocketNSS::IsConnected() const {
// Ideally, we should also check if we have received the close_notify alert
// message from the server, and return false in that case. We're not doing
// that, so this function may return a false positive. Since the upper
// layer (HttpNetworkTransaction) needs to handle a persistent connection
// closed by the server when we send a request anyway, a false positive in
// exchange for simpler code is a good trade-off.
EnterFunction("");
bool ret = completed_handshake_ && transport_->socket()->IsConnected();
LeaveFunction("");
return ret;
}
bool SSLClientSocketNSS::IsConnectedAndIdle() const {
// Unlike IsConnected, this method doesn't return a false positive.
//
// Strictly speaking, we should check if we have received the close_notify
// alert message from the server, and return false in that case. Although
// the close_notify alert message means EOF in the SSL layer, it is just
// bytes to the transport layer below, so
// transport_->socket()->IsConnectedAndIdle() returns the desired false
// when we receive close_notify.
EnterFunction("");
bool ret = completed_handshake_ && transport_->socket()->IsConnectedAndIdle();
LeaveFunction("");
return ret;
}
int SSLClientSocketNSS::GetPeerAddress(IPEndPoint* address) const {
return transport_->socket()->GetPeerAddress(address);
}
int SSLClientSocketNSS::GetLocalAddress(IPEndPoint* address) const {
return transport_->socket()->GetLocalAddress(address);
}
const BoundNetLog& SSLClientSocketNSS::NetLog() const {
return net_log_;
}
void SSLClientSocketNSS::SetSubresourceSpeculation() {
if (transport_.get() && transport_->socket()) {
transport_->socket()->SetSubresourceSpeculation();
} else {
NOTREACHED();
}
}
void SSLClientSocketNSS::SetOmniboxSpeculation() {
if (transport_.get() && transport_->socket()) {
transport_->socket()->SetOmniboxSpeculation();
} else {
NOTREACHED();
}
}
bool SSLClientSocketNSS::WasEverUsed() const {
if (transport_.get() && transport_->socket()) {
return transport_->socket()->WasEverUsed();
}
NOTREACHED();
return false;
}
bool SSLClientSocketNSS::UsingTCPFastOpen() const {
if (transport_.get() && transport_->socket()) {
return transport_->socket()->UsingTCPFastOpen();
}
NOTREACHED();
return false;
}
int64 SSLClientSocketNSS::NumBytesRead() const {
if (transport_.get() && transport_->socket()) {
return transport_->socket()->NumBytesRead();
}
NOTREACHED();
return -1;
}
base::TimeDelta SSLClientSocketNSS::GetConnectTimeMicros() const {
if (transport_.get() && transport_->socket()) {
return transport_->socket()->GetConnectTimeMicros();
}
NOTREACHED();
return base::TimeDelta::FromMicroseconds(-1);
}
int SSLClientSocketNSS::Read(IOBuffer* buf, int buf_len,
const CompletionCallback& callback) {
DCHECK(core_);
DCHECK(!callback.is_null());
EnterFunction(buf_len);
int rv = core_->Read(buf, buf_len, callback);
LeaveFunction(rv);
return rv;
}
int SSLClientSocketNSS::Write(IOBuffer* buf, int buf_len,
const CompletionCallback& callback) {
DCHECK(core_);
DCHECK(!callback.is_null());
EnterFunction(buf_len);
int rv = core_->Write(buf, buf_len, callback);
LeaveFunction(rv);
return rv;
}
bool SSLClientSocketNSS::SetReceiveBufferSize(int32 size) {
return transport_->socket()->SetReceiveBufferSize(size);
}
bool SSLClientSocketNSS::SetSendBufferSize(int32 size) {
return transport_->socket()->SetSendBufferSize(size);
}
int SSLClientSocketNSS::Init() {
EnterFunction("");
// Initialize the NSS SSL library in a threadsafe way. This also
// initializes the NSS base library.
EnsureNSSSSLInit();
if (!NSS_IsInitialized())
return ERR_UNEXPECTED;
#if defined(USE_NSS) || defined(OS_IOS)
if (ssl_config_.cert_io_enabled) {
// We must call EnsureNSSHttpIOInit() here, on the IO thread, to get the IO
// loop by MessageLoopForIO::current().
// X509Certificate::Verify() runs on a worker thread of CertVerifier.
EnsureNSSHttpIOInit();
}
#endif
LeaveFunction("");
return OK;
}
void SSLClientSocketNSS::InitCore() {
core_ = new Core(base::ThreadTaskRunnerHandle::Get(), nss_task_runner_,
transport_.get(), host_and_port_, ssl_config_, &net_log_,
server_bound_cert_service_);
}
int SSLClientSocketNSS::InitializeSSLOptions() {
// Transport connected, now hook it up to nss
nss_fd_ = memio_CreateIOLayer(kRecvBufferSize, kSendBufferSize);
if (nss_fd_ == NULL) {
return ERR_OUT_OF_MEMORY; // TODO(port): map NSPR error code.
}
// Grab pointer to buffers
memio_Private* nss_bufs = memio_GetSecret(nss_fd_);
/* Create SSL state machine */
/* Push SSL onto our fake I/O socket */
nss_fd_ = SSL_ImportFD(NULL, nss_fd_);
if (nss_fd_ == NULL) {
LogFailedNSSFunction(net_log_, "SSL_ImportFD", "");
return ERR_OUT_OF_MEMORY; // TODO(port): map NSPR/NSS error code.
}
// TODO(port): set more ssl options! Check errors!
int rv;
rv = SSL_OptionSet(nss_fd_, SSL_SECURITY, PR_TRUE);
if (rv != SECSuccess) {
LogFailedNSSFunction(net_log_, "SSL_OptionSet", "SSL_SECURITY");
return ERR_UNEXPECTED;
}
rv = SSL_OptionSet(nss_fd_, SSL_ENABLE_SSL2, PR_FALSE);
if (rv != SECSuccess) {
LogFailedNSSFunction(net_log_, "SSL_OptionSet", "SSL_ENABLE_SSL2");
return ERR_UNEXPECTED;
}
// Don't do V2 compatible hellos because they don't support TLS extensions.
rv = SSL_OptionSet(nss_fd_, SSL_V2_COMPATIBLE_HELLO, PR_FALSE);
if (rv != SECSuccess) {
LogFailedNSSFunction(net_log_, "SSL_OptionSet", "SSL_V2_COMPATIBLE_HELLO");
return ERR_UNEXPECTED;
}
SSLVersionRange version_range;
version_range.min = ssl_config_.version_min;
version_range.max = ssl_config_.version_max;
rv = SSL_VersionRangeSet(nss_fd_, &version_range);
if (rv != SECSuccess) {
LogFailedNSSFunction(net_log_, "SSL_VersionRangeSet", "");
return ERR_NO_SSL_VERSIONS_ENABLED;
}
for (std::vector<uint16>::const_iterator it =
ssl_config_.disabled_cipher_suites.begin();
it != ssl_config_.disabled_cipher_suites.end(); ++it) {
// This will fail if the specified cipher is not implemented by NSS, but
// the failure is harmless.
SSL_CipherPrefSet(nss_fd_, *it, PR_FALSE);
}
#ifdef SSL_ENABLE_SESSION_TICKETS
// Support RFC 5077
rv = SSL_OptionSet(nss_fd_, SSL_ENABLE_SESSION_TICKETS, PR_TRUE);
if (rv != SECSuccess) {
LogFailedNSSFunction(
net_log_, "SSL_OptionSet", "SSL_ENABLE_SESSION_TICKETS");
}
#else
#error "You need to install NSS-3.12 or later to build chromium"
#endif
#ifdef SSL_ENABLE_FALSE_START
rv = SSL_OptionSet(nss_fd_, SSL_ENABLE_FALSE_START,
ssl_config_.false_start_enabled);
if (rv != SECSuccess)
LogFailedNSSFunction(net_log_, "SSL_OptionSet", "SSL_ENABLE_FALSE_START");
#endif
#ifdef SSL_ENABLE_RENEGOTIATION
// We allow servers to request renegotiation. Since we're a client,
// prohibiting this is rather a waste of time. Only servers are in a
// position to prevent renegotiation attacks.
// http://extendedsubset.com/?p=8
rv = SSL_OptionSet(nss_fd_, SSL_ENABLE_RENEGOTIATION,
SSL_RENEGOTIATE_TRANSITIONAL);
if (rv != SECSuccess) {
LogFailedNSSFunction(
net_log_, "SSL_OptionSet", "SSL_ENABLE_RENEGOTIATION");
}
#endif // SSL_ENABLE_RENEGOTIATION
#ifdef SSL_CBC_RANDOM_IV
rv = SSL_OptionSet(nss_fd_, SSL_CBC_RANDOM_IV,
ssl_config_.false_start_enabled);
if (rv != SECSuccess)
LogFailedNSSFunction(net_log_, "SSL_OptionSet", "SSL_CBC_RANDOM_IV");
#endif
#ifdef SSL_ENABLE_OCSP_STAPLING
if (IsOCSPStaplingSupported()) {
rv = SSL_OptionSet(nss_fd_, SSL_ENABLE_OCSP_STAPLING, PR_TRUE);
if (rv != SECSuccess) {
LogFailedNSSFunction(net_log_, "SSL_OptionSet",
"SSL_ENABLE_OCSP_STAPLING");
}
}
#endif
#ifdef SSL_ENABLE_CACHED_INFO
rv = SSL_OptionSet(nss_fd_, SSL_ENABLE_CACHED_INFO,
ssl_config_.cached_info_enabled);
if (rv != SECSuccess)
LogFailedNSSFunction(net_log_, "SSL_OptionSet", "SSL_ENABLE_CACHED_INFO");
#endif
rv = SSL_OptionSet(nss_fd_, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE);
if (rv != SECSuccess) {
LogFailedNSSFunction(net_log_, "SSL_OptionSet", "SSL_HANDSHAKE_AS_CLIENT");
return ERR_UNEXPECTED;
}
if (!core_->Init(nss_fd_, nss_bufs))
return ERR_UNEXPECTED;
// Tell SSL the hostname we're trying to connect to.
SSL_SetURL(nss_fd_, host_and_port_.host().c_str());
// Tell SSL we're a client; needed if not letting NSPR do socket I/O
SSL_ResetHandshake(nss_fd_, PR_FALSE);
return OK;
}
int SSLClientSocketNSS::InitializeSSLPeerName() {
// Tell NSS who we're connected to
IPEndPoint peer_address;
int err = transport_->socket()->GetPeerAddress(&peer_address);
if (err != OK)
return err;
SockaddrStorage storage;
if (!peer_address.ToSockAddr(storage.addr, &storage.addr_len))
return ERR_UNEXPECTED;
PRNetAddr peername;
memset(&peername, 0, sizeof(peername));
DCHECK_LE(static_cast<size_t>(storage.addr_len), sizeof(peername));
size_t len = std::min(static_cast<size_t>(storage.addr_len),
sizeof(peername));
memcpy(&peername, storage.addr, len);
// Adjust the address family field for BSD, whose sockaddr
// structure has a one-byte length and one-byte address family
// field at the beginning. PRNetAddr has a two-byte address
// family field at the beginning.
peername.raw.family = storage.addr->sa_family;
memio_SetPeerName(nss_fd_, &peername);
// Set the peer ID for session reuse. This is necessary when we create an
// SSL tunnel through a proxy -- GetPeerName returns the proxy's address
// rather than the destination server's address in that case.
std::string peer_id = host_and_port_.ToString();
// If the ssl_session_cache_shard_ is non-empty, we append it to the peer id.
// This will cause session cache misses between sockets with different values
// of ssl_session_cache_shard_ and this is used to partition the session cache
// for incognito mode.
if (!ssl_session_cache_shard_.empty()) {
peer_id += "/" + ssl_session_cache_shard_;
}
SECStatus rv = SSL_SetSockPeerID(nss_fd_, const_cast<char*>(peer_id.c_str()));
if (rv != SECSuccess)
LogFailedNSSFunction(net_log_, "SSL_SetSockPeerID", peer_id.c_str());
return OK;
}
void SSLClientSocketNSS::DoConnectCallback(int rv) {
EnterFunction(rv);
DCHECK_NE(ERR_IO_PENDING, rv);
DCHECK(!user_connect_callback_.is_null());
base::ResetAndReturn(&user_connect_callback_).Run(rv > OK ? OK : rv);
LeaveFunction("");
}
void SSLClientSocketNSS::OnHandshakeIOComplete(int result) {
EnterFunction(result);
int rv = DoHandshakeLoop(result);
if (rv != ERR_IO_PENDING) {
net_log_.EndEventWithNetErrorCode(NetLog::TYPE_SSL_CONNECT, rv);
DoConnectCallback(rv);
}
LeaveFunction("");
}
int SSLClientSocketNSS::DoHandshakeLoop(int last_io_result) {
EnterFunction(last_io_result);
int rv = last_io_result;
do {
// Default to STATE_NONE for next state.
// (This is a quirk carried over from the windows
// implementation. It makes reading the logs a bit harder.)
// State handlers can and often do call GotoState just
// to stay in the current state.
State state = next_handshake_state_;
GotoState(STATE_NONE);
switch (state) {
case STATE_HANDSHAKE:
rv = DoHandshake();
break;
case STATE_HANDSHAKE_COMPLETE:
rv = DoHandshakeComplete(rv);
break;
case STATE_VERIFY_CERT:
DCHECK(rv == OK);
rv = DoVerifyCert(rv);
break;
case STATE_VERIFY_CERT_COMPLETE:
rv = DoVerifyCertComplete(rv);
break;
case STATE_NONE:
default:
rv = ERR_UNEXPECTED;
LOG(DFATAL) << "unexpected state " << state;
break;
}
} while (rv != ERR_IO_PENDING && next_handshake_state_ != STATE_NONE);
LeaveFunction("");
return rv;
}
int SSLClientSocketNSS::DoHandshake() {
EnterFunction("");
int rv = core_->Connect(
base::Bind(&SSLClientSocketNSS::OnHandshakeIOComplete,
base::Unretained(this)));
GotoState(STATE_HANDSHAKE_COMPLETE);
LeaveFunction(rv);
return rv;
}
int SSLClientSocketNSS::DoHandshakeComplete(int result) {
EnterFunction(result);
if (result == OK) {
// SSL handshake is completed. Let's verify the certificate.
GotoState(STATE_VERIFY_CERT);
// Done!
}
set_channel_id_sent(core_->state().channel_id_sent);
LeaveFunction(result);
return result;
}
int SSLClientSocketNSS::DoVerifyCert(int result) {
DCHECK(!core_->state().server_cert_chain.empty());
DCHECK(core_->state().server_cert_chain[0]);
GotoState(STATE_VERIFY_CERT_COMPLETE);
// If the certificate is expected to be bad we can use the expectation as
// the cert status.
base::StringPiece der_cert(
reinterpret_cast<char*>(
core_->state().server_cert_chain[0]->derCert.data),
core_->state().server_cert_chain[0]->derCert.len);
CertStatus cert_status;
if (ssl_config_.IsAllowedBadCert(der_cert, &cert_status)) {
DCHECK(start_cert_verification_time_.is_null());
VLOG(1) << "Received an expected bad cert with status: " << cert_status;
server_cert_verify_result_.Reset();
server_cert_verify_result_.cert_status = cert_status;
server_cert_verify_result_.verified_cert = core_->state().server_cert;
return OK;
}
// We may have failed to create X509Certificate object if we are
// running inside sandbox.
if (!core_->state().server_cert) {
server_cert_verify_result_.Reset();
server_cert_verify_result_.cert_status = CERT_STATUS_INVALID;
return ERR_CERT_INVALID;
}
start_cert_verification_time_ = base::TimeTicks::Now();
int flags = 0;
if (ssl_config_.rev_checking_enabled)
flags |= CertVerifier::VERIFY_REV_CHECKING_ENABLED;
if (ssl_config_.verify_ev_cert)
flags |= CertVerifier::VERIFY_EV_CERT;
if (ssl_config_.cert_io_enabled)
flags |= CertVerifier::VERIFY_CERT_IO_ENABLED;
verifier_.reset(new SingleRequestCertVerifier(cert_verifier_));
return verifier_->Verify(
core_->state().server_cert, host_and_port_.host(), flags,
SSLConfigService::GetCRLSet(), &server_cert_verify_result_,
base::Bind(&SSLClientSocketNSS::OnHandshakeIOComplete,
base::Unretained(this)),
net_log_);
}
// Derived from AuthCertificateCallback() in
// mozilla/source/security/manager/ssl/src/nsNSSCallbacks.cpp.
int SSLClientSocketNSS::DoVerifyCertComplete(int result) {
verifier_.reset();
if (!start_cert_verification_time_.is_null()) {
base::TimeDelta verify_time =
base::TimeTicks::Now() - start_cert_verification_time_;
if (result == OK)
UMA_HISTOGRAM_TIMES("Net.SSLCertVerificationTime", verify_time);
else
UMA_HISTOGRAM_TIMES("Net.SSLCertVerificationTimeError", verify_time);
}
// We used to remember the intermediate CA certs in the NSS database
// persistently. However, NSS opens a connection to the SQLite database
// during NSS initialization and doesn't close the connection until NSS
// shuts down. If the file system where the database resides is gone,
// the database connection goes bad. What's worse, the connection won't
// recover when the file system comes back. Until this NSS or SQLite bug
// is fixed, we need to avoid using the NSS database for non-essential
// purposes. See https://bugzilla.mozilla.org/show_bug.cgi?id=508081 and
// http://crbug.com/15630 for more info.
// TODO(hclam): Skip logging if server cert was expected to be bad because
// |server_cert_verify_result_| doesn't contain all the information about
// the cert.
if (result == OK)
LogConnectionTypeMetrics();
completed_handshake_ = true;
#if defined(OFFICIAL_BUILD) && !defined(OS_ANDROID)
// Take care of any mandates for public key pinning.
//
// Pinning is only enabled for official builds to make sure that others don't
// end up with pins that cannot be easily updated.
//
// TODO(agl): we might have an issue here where a request for foo.example.com
// merges into a SPDY connection to www.example.com, and gets a different
// certificate.
const CertStatus cert_status = server_cert_verify_result_.cert_status;
if ((result == OK || (IsCertificateError(result) &&
IsCertStatusMinorError(cert_status))) &&
server_cert_verify_result_.is_issued_by_known_root &&
transport_security_state_) {
bool sni_available =
ssl_config_.version_max >= SSL_PROTOCOL_VERSION_TLS1 ||
ssl_config_.version_fallback;
const std::string& host = host_and_port_.host();
TransportSecurityState::DomainState domain_state;
if (transport_security_state_->GetDomainState(host, sni_available,
&domain_state) &&
domain_state.HasPins()) {
if (!domain_state.IsChainOfPublicKeysPermitted(
server_cert_verify_result_.public_key_hashes)) {
// Pins are not enforced if the build is too old.
if (TransportSecurityState::IsBuildTimely()) {
result = ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN;
UMA_HISTOGRAM_BOOLEAN("Net.PublicKeyPinSuccess", false);
TransportSecurityState::ReportUMAOnPinFailure(host);
}
} else {
UMA_HISTOGRAM_BOOLEAN("Net.PublicKeyPinSuccess", true);
}
}
}
#endif
// Exit DoHandshakeLoop and return the result to the caller to Connect.
DCHECK_EQ(STATE_NONE, next_handshake_state_);
return result;
}
void SSLClientSocketNSS::LogConnectionTypeMetrics() const {
UpdateConnectionTypeHistograms(CONNECTION_SSL);
if (server_cert_verify_result_.has_md5)
UpdateConnectionTypeHistograms(CONNECTION_SSL_MD5);
if (server_cert_verify_result_.has_md2)
UpdateConnectionTypeHistograms(CONNECTION_SSL_MD2);
if (server_cert_verify_result_.has_md4)
UpdateConnectionTypeHistograms(CONNECTION_SSL_MD4);
if (server_cert_verify_result_.has_md5_ca)
UpdateConnectionTypeHistograms(CONNECTION_SSL_MD5_CA);
if (server_cert_verify_result_.has_md2_ca)
UpdateConnectionTypeHistograms(CONNECTION_SSL_MD2_CA);
int ssl_version = SSLConnectionStatusToVersion(
core_->state().ssl_connection_status);
switch (ssl_version) {
case SSL_CONNECTION_VERSION_SSL2:
UpdateConnectionTypeHistograms(CONNECTION_SSL_SSL2);
break;
case SSL_CONNECTION_VERSION_SSL3:
UpdateConnectionTypeHistograms(CONNECTION_SSL_SSL3);
break;
case SSL_CONNECTION_VERSION_TLS1:
UpdateConnectionTypeHistograms(CONNECTION_SSL_TLS1);
break;
case SSL_CONNECTION_VERSION_TLS1_1:
UpdateConnectionTypeHistograms(CONNECTION_SSL_TLS1_1);
break;
case SSL_CONNECTION_VERSION_TLS1_2:
UpdateConnectionTypeHistograms(CONNECTION_SSL_TLS1_2);
break;
};
}
void SSLClientSocketNSS::EnsureThreadIdAssigned() const {
base::AutoLock auto_lock(lock_);
if (valid_thread_id_ != base::kInvalidThreadId)
return;
valid_thread_id_ = base::PlatformThread::CurrentId();
}
bool SSLClientSocketNSS::CalledOnValidThread() const {
EnsureThreadIdAssigned();
base::AutoLock auto_lock(lock_);
return valid_thread_id_ == base::PlatformThread::CurrentId();
}
ServerBoundCertService* SSLClientSocketNSS::GetServerBoundCertService() const {
return server_bound_cert_service_;
}
} // namespace net