1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
// Copyright 2016 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 "chrome/browser/ssl/chrome_expect_ct_reporter.h"
#include <string>
#include "base/base64.h"
#include "base/command_line.h"
#include "base/json/json_writer.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
#include "chrome/common/chrome_switches.h"
#include "net/url_request/certificate_report_sender.h"
namespace {
std::string TimeToISO8601(const base::Time& t) {
base::Time::Exploded exploded;
t.UTCExplode(&exploded);
return base::StringPrintf(
"%04d-%02d-%02dT%02d:%02d:%02d.%03dZ", exploded.year, exploded.month,
exploded.day_of_month, exploded.hour, exploded.minute, exploded.second,
exploded.millisecond);
}
scoped_ptr<base::ListValue> GetPEMEncodedChainAsList(
const net::X509Certificate* cert_chain) {
if (!cert_chain)
return make_scoped_ptr(new base::ListValue());
scoped_ptr<base::ListValue> result(new base::ListValue());
std::vector<std::string> pem_encoded_chain;
cert_chain->GetPEMEncodedChain(&pem_encoded_chain);
for (const std::string& cert : pem_encoded_chain)
result->Append(make_scoped_ptr(new base::StringValue(cert)));
return result;
}
std::string SCTOriginToString(
net::ct::SignedCertificateTimestamp::Origin origin) {
switch (origin) {
case net::ct::SignedCertificateTimestamp::SCT_EMBEDDED:
return "embedded";
case net::ct::SignedCertificateTimestamp::SCT_FROM_TLS_EXTENSION:
return "from-tls-extension";
case net::ct::SignedCertificateTimestamp::SCT_FROM_OCSP_RESPONSE:
return "from-ocsp-response";
default:
NOTREACHED();
}
return "";
}
void AddUnknownSCT(
const net::SignedCertificateTimestampAndStatus& sct_and_status,
base::ListValue* list) {
scoped_ptr<base::DictionaryValue> list_item(new base::DictionaryValue());
list_item->SetString("origin", SCTOriginToString(sct_and_status.sct->origin));
list->Append(std::move(list_item));
}
void AddInvalidSCT(
const net::SignedCertificateTimestampAndStatus& sct_and_status,
base::ListValue* list) {
scoped_ptr<base::DictionaryValue> list_item(new base::DictionaryValue());
list_item->SetString("origin", SCTOriginToString(sct_and_status.sct->origin));
std::string log_id;
base::Base64Encode(sct_and_status.sct->log_id, &log_id);
list_item->SetString("id", log_id);
list->Append(std::move(list_item));
}
void AddValidSCT(const net::SignedCertificateTimestampAndStatus& sct_and_status,
base::ListValue* list) {
scoped_ptr<base::DictionaryValue> list_item(new base::DictionaryValue());
list_item->SetString("origin", SCTOriginToString(sct_and_status.sct->origin));
// The structure of the SCT object is defined in
// http://tools.ietf.org/html/rfc6962#section-4.1.
scoped_ptr<base::DictionaryValue> sct(new base::DictionaryValue());
sct->SetInteger("sct_version", sct_and_status.sct->version);
std::string log_id;
base::Base64Encode(sct_and_status.sct->log_id, &log_id);
sct->SetString("id", log_id);
base::TimeDelta timestamp =
sct_and_status.sct->timestamp - base::Time::UnixEpoch();
sct->SetString("timestamp", base::Int64ToString(timestamp.InMilliseconds()));
std::string extensions;
base::Base64Encode(sct_and_status.sct->extensions, &extensions);
sct->SetString("extensions", extensions);
std::string signature;
base::Base64Encode(sct_and_status.sct->signature.signature_data, &signature);
sct->SetString("signature", signature);
list_item->Set("sct", std::move(sct));
list->Append(std::move(list_item));
}
} // namespace
ChromeExpectCTReporter::ChromeExpectCTReporter(
net::URLRequestContext* request_context)
: report_sender_(new net::CertificateReportSender(
request_context,
net::CertificateReportSender::DO_NOT_SEND_COOKIES)) {}
ChromeExpectCTReporter::~ChromeExpectCTReporter() {}
void ChromeExpectCTReporter::OnExpectCTFailed(
const net::HostPortPair& host_port_pair,
const GURL& report_uri,
const net::SSLInfo& ssl_info) {
if (report_uri.is_empty())
return;
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableExpectCTReporting)) {
return;
}
// TODO(estark): De-duplicate reports so that the same report isn't
// sent too often in some period of time.
base::DictionaryValue report;
report.SetString("hostname", host_port_pair.host());
report.SetInteger("port", host_port_pair.port());
report.SetString("date-time", TimeToISO8601(base::Time::Now()));
report.Set("served-certificate-chain",
GetPEMEncodedChainAsList(ssl_info.unverified_cert.get()));
report.Set("validated-certificate-chain",
GetPEMEncodedChainAsList(ssl_info.cert.get()));
scoped_ptr<base::ListValue> unknown_scts(new base::ListValue());
scoped_ptr<base::ListValue> invalid_scts(new base::ListValue());
scoped_ptr<base::ListValue> valid_scts(new base::ListValue());
for (const auto& sct_and_status : ssl_info.signed_certificate_timestamps) {
switch (sct_and_status.status) {
case net::ct::SCT_STATUS_LOG_UNKNOWN:
AddUnknownSCT(sct_and_status, unknown_scts.get());
break;
case net::ct::SCT_STATUS_INVALID:
AddInvalidSCT(sct_and_status, invalid_scts.get());
break;
case net::ct::SCT_STATUS_OK:
AddValidSCT(sct_and_status, valid_scts.get());
break;
default:
NOTREACHED();
}
}
report.Set("unknown-scts", std::move(unknown_scts));
report.Set("invalid-scts", std::move(invalid_scts));
report.Set("valid-scts", std::move(valid_scts));
std::string serialized_report;
if (!base::JSONWriter::Write(report, &serialized_report)) {
LOG(ERROR) << "Failed to serialize Expect CT report";
return;
}
report_sender_->Send(report_uri, serialized_report);
}
|
