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// Copyright (c) 2010 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.
#include "net/socket/ssl_host_info.h"
#include "base/metrics/histogram.h"
#include "base/pickle.h"
#include "base/string_piece.h"
#include "net/base/dns_util.h"
#include "net/base/dnsrr_resolver.h"
#include "net/base/ssl_config_service.h"
#include "net/base/x509_certificate.h"
#include "net/socket/ssl_client_socket.h"
namespace net {
SSLHostInfo::State::State() {}
SSLHostInfo::State::~State() {}
void SSLHostInfo::State::Clear() {
certs.clear();
}
SSLHostInfo::SSLHostInfo(
const std::string& hostname,
const SSLConfig& ssl_config,
CertVerifier* cert_verifier)
: cert_verification_complete_(false),
cert_verification_error_(ERR_CERT_INVALID),
hostname_(hostname),
cert_parsing_failed_(false),
cert_verification_callback_(NULL),
rev_checking_enabled_(ssl_config.rev_checking_enabled),
verify_ev_cert_(ssl_config.verify_ev_cert),
verifier_(cert_verifier),
callback_(new CancelableCompletionCallback<SSLHostInfo>(
ALLOW_THIS_IN_INITIALIZER_LIST(this),
&SSLHostInfo::VerifyCallback)),
dnsrr_resolver_(NULL),
dns_callback_(NULL),
dns_handle_(DnsRRResolver::kInvalidHandle) {
}
SSLHostInfo::~SSLHostInfo() {
if (dns_handle_ != DnsRRResolver::kInvalidHandle) {
dnsrr_resolver_->CancelResolve(dns_handle_);
delete dns_callback_;
}
}
void SSLHostInfo::StartDnsLookup(DnsRRResolver* dnsrr_resolver) {
dnsrr_resolver_ = dnsrr_resolver;
// Note: currently disabled.
}
const SSLHostInfo::State& SSLHostInfo::state() const {
return state_;
}
SSLHostInfo::State* SSLHostInfo::mutable_state() {
return &state_;
}
bool SSLHostInfo::Parse(const std::string& data) {
State* state = mutable_state();
state->Clear();
cert_verification_complete_ = false;
bool r = ParseInner(data);
if (!r)
state->Clear();
return r;
}
bool SSLHostInfo::ParseInner(const std::string& data) {
State* state = mutable_state();
Pickle p(data.data(), data.size());
void* iter = NULL;
int num_der_certs;
if (!p.ReadInt(&iter, &num_der_certs) ||
num_der_certs < 0) {
return false;
}
for (int i = 0; i < num_der_certs; i++) {
std::string der_cert;
if (!p.ReadString(&iter, &der_cert))
return false;
state->certs.push_back(der_cert);
}
std::string throwaway_string;
bool throwaway_bool;
if (!p.ReadString(&iter, &throwaway_string))
return false;
if (!p.ReadBool(&iter, &throwaway_bool))
return false;
if (throwaway_bool) {
int throwaway_int;
if (!p.ReadInt(&iter, &throwaway_int) ||
!p.ReadString(&iter, &throwaway_string)) {
return false;
}
}
if (!state->certs.empty()) {
std::vector<base::StringPiece> der_certs(state->certs.size());
for (size_t i = 0; i < state->certs.size(); i++)
der_certs[i] = state->certs[i];
cert_ = X509Certificate::CreateFromDERCertChain(der_certs);
if (cert_.get()) {
int flags = 0;
if (verify_ev_cert_)
flags |= X509Certificate::VERIFY_EV_CERT;
if (rev_checking_enabled_)
flags |= X509Certificate::VERIFY_REV_CHECKING_ENABLED;
VLOG(1) << "Kicking off verification for " << hostname_;
verification_start_time_ = base::TimeTicks::Now();
verification_end_time_ = base::TimeTicks();
int rv = verifier_.Verify(cert_.get(), hostname_, flags,
&cert_verify_result_, callback_);
if (rv != ERR_IO_PENDING)
VerifyCallback(rv);
} else {
cert_parsing_failed_ = true;
DCHECK(!cert_verification_callback_);
}
}
return true;
}
std::string SSLHostInfo::Serialize() const {
Pickle p(sizeof(Pickle::Header));
static const unsigned kMaxCertificatesSize = 32 * 1024;
unsigned der_certs_size = 0;
for (std::vector<std::string>::const_iterator
i = state_.certs.begin(); i != state_.certs.end(); i++) {
der_certs_size += i->size();
}
// We don't care to save the certificates over a certain size.
if (der_certs_size > kMaxCertificatesSize)
return "";
if (!p.WriteInt(state_.certs.size()))
return "";
for (std::vector<std::string>::const_iterator
i = state_.certs.begin(); i != state_.certs.end(); i++) {
if (!p.WriteString(*i))
return "";
}
if (!p.WriteString("") ||
!p.WriteBool(false)) {
return "";
}
return std::string(reinterpret_cast<const char *>(p.data()), p.size());
}
const CertVerifyResult& SSLHostInfo::cert_verify_result() const {
return cert_verify_result_;
}
int SSLHostInfo::WaitForCertVerification(CompletionCallback* callback) {
if (cert_verification_complete_)
return cert_verification_error_;
DCHECK(!cert_parsing_failed_);
DCHECK(!cert_verification_callback_);
DCHECK(!state_.certs.empty());
cert_verification_callback_ = callback;
return ERR_IO_PENDING;
}
void SSLHostInfo::VerifyCallback(int rv) {
DCHECK(!verification_start_time_.is_null());
base::TimeTicks now = base::TimeTicks::Now();
const base::TimeDelta duration = now - verification_start_time();
UMA_HISTOGRAM_TIMES("Net.SSLHostInfoVerificationTimeMs", duration);
VLOG(1) << "Verification took " << duration.InMilliseconds() << "ms";
verification_end_time_ = now;
cert_verification_complete_ = true;
cert_verification_error_ = rv;
if (cert_verification_callback_) {
CompletionCallback* callback = cert_verification_callback_;
cert_verification_callback_ = NULL;
callback->Run(rv);
}
}
SSLHostInfoFactory::~SSLHostInfoFactory() {}
} // namespace net
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