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
|
// Copyright 2014 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 "content/child/webcrypto/openssl/aes_key_openssl.h"
#include "base/logging.h"
#include "content/child/webcrypto/crypto_data.h"
#include "content/child/webcrypto/jwk.h"
#include "content/child/webcrypto/openssl/key_openssl.h"
#include "content/child/webcrypto/openssl/sym_key_openssl.h"
#include "content/child/webcrypto/status.h"
#include "content/child/webcrypto/webcrypto_util.h"
#include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h"
namespace content {
namespace webcrypto {
AesAlgorithm::AesAlgorithm(blink::WebCryptoKeyUsageMask all_key_usages,
const std::string& jwk_suffix)
: all_key_usages_(all_key_usages), jwk_suffix_(jwk_suffix) {
}
AesAlgorithm::AesAlgorithm(const std::string& jwk_suffix)
: all_key_usages_(blink::WebCryptoKeyUsageEncrypt |
blink::WebCryptoKeyUsageDecrypt |
blink::WebCryptoKeyUsageWrapKey |
blink::WebCryptoKeyUsageUnwrapKey),
jwk_suffix_(jwk_suffix) {
}
Status AesAlgorithm::GenerateKey(const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
GenerateKeyResult* result) const {
Status status = CheckKeyCreationUsages(all_key_usages_, usages);
if (status.IsError())
return status;
unsigned int keylen_bits;
status = GetAesKeyGenLengthInBits(algorithm.aesKeyGenParams(), &keylen_bits);
if (status.IsError())
return status;
return GenerateSecretKeyOpenSsl(
blink::WebCryptoKeyAlgorithm::createAes(algorithm.id(), keylen_bits),
extractable,
usages,
keylen_bits / 8,
result);
}
Status AesAlgorithm::VerifyKeyUsagesBeforeImportKey(
blink::WebCryptoKeyFormat format,
blink::WebCryptoKeyUsageMask usages) const {
switch (format) {
case blink::WebCryptoKeyFormatRaw:
case blink::WebCryptoKeyFormatJwk:
return CheckKeyCreationUsages(all_key_usages_, usages);
default:
return Status::ErrorUnsupportedImportKeyFormat();
}
}
Status AesAlgorithm::ImportKeyRaw(const CryptoData& key_data,
const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
blink::WebCryptoKey* key) const {
const unsigned int keylen_bytes = key_data.byte_length();
Status status = VerifyAesKeyLengthForImport(keylen_bytes);
if (status.IsError())
return status;
// No possibility of overflow.
unsigned int keylen_bits = keylen_bytes * 8;
return ImportKeyRawOpenSsl(
key_data,
blink::WebCryptoKeyAlgorithm::createAes(algorithm.id(), keylen_bits),
extractable,
usages,
key);
}
Status AesAlgorithm::ImportKeyJwk(const CryptoData& key_data,
const blink::WebCryptoAlgorithm& algorithm,
bool extractable,
blink::WebCryptoKeyUsageMask usages,
blink::WebCryptoKey* key) const {
std::vector<uint8_t> raw_data;
Status status = ReadAesSecretKeyJwk(
key_data, jwk_suffix_, extractable, usages, &raw_data);
if (status.IsError())
return status;
return ImportKeyRaw(
CryptoData(raw_data), algorithm, extractable, usages, key);
}
Status AesAlgorithm::ExportKeyRaw(const blink::WebCryptoKey& key,
std::vector<uint8_t>* buffer) const {
*buffer = SymKeyOpenSsl::Cast(key)->raw_key_data();
return Status::Success();
}
Status AesAlgorithm::ExportKeyJwk(const blink::WebCryptoKey& key,
std::vector<uint8_t>* buffer) const {
const std::vector<uint8_t>& raw_data =
SymKeyOpenSsl::Cast(key)->raw_key_data();
WriteSecretKeyJwk(CryptoData(raw_data),
MakeJwkAesAlgorithmName(jwk_suffix_, raw_data.size()),
key.extractable(),
key.usages(),
buffer);
return Status::Success();
}
} // namespace webcrypto
} // namespace content
|
