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
|
/*
* Copyright 2012 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/ssl_fingerprint.h"
#include <ctype.h>
#include <cstdint>
#include <memory>
#include <string>
#include "absl/algorithm/container.h"
#include "absl/strings/string_view.h"
#include "api/array_view.h"
#include "rtc_base/logging.h"
#include "rtc_base/message_digest.h"
#include "rtc_base/rtc_certificate.h"
#include "rtc_base/ssl_certificate.h"
#include "rtc_base/ssl_identity.h"
#include "rtc_base/string_encode.h"
namespace rtc {
SSLFingerprint* SSLFingerprint::Create(absl::string_view algorithm,
const rtc::SSLIdentity* identity) {
return CreateUnique(algorithm, *identity).release();
}
std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateUnique(
absl::string_view algorithm,
const rtc::SSLIdentity& identity) {
return Create(algorithm, identity.certificate());
}
std::unique_ptr<SSLFingerprint> SSLFingerprint::Create(
absl::string_view algorithm,
const rtc::SSLCertificate& cert) {
uint8_t digest_val[64];
size_t digest_len;
bool ret = cert.ComputeDigest(algorithm, digest_val, sizeof(digest_val),
&digest_len);
if (!ret) {
return nullptr;
}
return std::make_unique<SSLFingerprint>(
algorithm, ArrayView<const uint8_t>(digest_val, digest_len));
}
SSLFingerprint* SSLFingerprint::CreateFromRfc4572(
absl::string_view algorithm,
absl::string_view fingerprint) {
return CreateUniqueFromRfc4572(algorithm, fingerprint).release();
}
std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateUniqueFromRfc4572(
absl::string_view algorithm,
absl::string_view fingerprint) {
if (algorithm.empty() || !rtc::IsFips180DigestAlgorithm(algorithm))
return nullptr;
if (fingerprint.empty())
return nullptr;
char value[rtc::MessageDigest::kMaxSize];
size_t value_len =
rtc::hex_decode_with_delimiter(ArrayView<char>(value), fingerprint, ':');
if (!value_len)
return nullptr;
return std::make_unique<SSLFingerprint>(
algorithm,
ArrayView<const uint8_t>(reinterpret_cast<uint8_t*>(value), value_len));
}
std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateFromCertificate(
const RTCCertificate& cert) {
std::string digest_alg;
if (!cert.GetSSLCertificate().GetSignatureDigestAlgorithm(&digest_alg)) {
RTC_LOG(LS_ERROR)
<< "Failed to retrieve the certificate's digest algorithm";
return nullptr;
}
std::unique_ptr<SSLFingerprint> fingerprint =
CreateUnique(digest_alg, *cert.identity());
if (!fingerprint) {
RTC_LOG(LS_ERROR) << "Failed to create identity fingerprint, alg="
<< digest_alg;
}
return fingerprint;
}
SSLFingerprint::SSLFingerprint(absl::string_view algorithm,
ArrayView<const uint8_t> digest_view)
: algorithm(algorithm), digest(digest_view.data(), digest_view.size()) {}
SSLFingerprint::SSLFingerprint(absl::string_view algorithm,
const uint8_t* digest_in,
size_t digest_len)
: SSLFingerprint(algorithm, MakeArrayView(digest_in, digest_len)) {}
bool SSLFingerprint::operator==(const SSLFingerprint& other) const {
return algorithm == other.algorithm && digest == other.digest;
}
std::string SSLFingerprint::GetRfc4572Fingerprint() const {
std::string fingerprint = rtc::hex_encode_with_delimiter(
absl::string_view(digest.data<char>(), digest.size()), ':');
absl::c_transform(fingerprint, fingerprint.begin(), ::toupper);
return fingerprint;
}
std::string SSLFingerprint::ToString() const {
std::string fp_str = algorithm;
fp_str.append(" ");
fp_str.append(GetRfc4572Fingerprint());
return fp_str;
}
} // namespace rtc
|
