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(C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.javacard.keymaster;
import javacard.framework.ISO7816;
import javacard.framework.ISOException;
import javacard.framework.Util;
/**
* KMKeyCharacteristics represents KeyCharacteristics structure from android keymaster hal
* specifications. It corresponds to CBOR array type. struct{byte KEY_CHAR_TYPE; short length=3;
* short arrayPtr} where arrayPtr is a pointer to ordered array with 1 or 3 following elements:
* {KMKeyParameters sb; KMKeyParameters tee; KMKeyParameters keystore}
*/
public class KMKeyCharacteristics extends KMType {
public static final byte STRONGBOX_ENFORCED = 0x00;
public static final byte TEE_ENFORCED = 0x01;
public static final byte KEYSTORE_ENFORCED = 0x02;
private static KMKeyCharacteristics prototype;
private KMKeyCharacteristics() {}
public static short exp() {
short keyParamExp = KMKeyParameters.exp();
short arrPtr = KMArray.instance((short) 3);
KMArray arr = KMArray.cast(arrPtr);
arr.add(STRONGBOX_ENFORCED, keyParamExp);
arr.add(TEE_ENFORCED, keyParamExp);
arr.add(KEYSTORE_ENFORCED, keyParamExp);
return instance(arrPtr);
}
private static KMKeyCharacteristics proto(short ptr) {
if (prototype == null) {
prototype = new KMKeyCharacteristics();
}
KMType.instanceTable[KM_KEY_CHARACTERISTICS_OFFSET] = ptr;
return prototype;
}
public static short instance() {
short arrPtr = KMArray.instance((short) 3);
return instance(arrPtr);
}
public static short instance(short vals) {
short ptr = KMType.instance(KEY_CHAR_TYPE, (short) 3);
if (KMArray.cast(vals).length() != 3) {
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
}
Util.setShort(heap, (short) (ptr + TLV_HEADER_SIZE), vals);
return ptr;
}
public static KMKeyCharacteristics cast(short ptr) {
if (heap[ptr] != KEY_CHAR_TYPE) {
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
}
short arrPtr = Util.getShort(heap, (short) (ptr + TLV_HEADER_SIZE));
if (heap[arrPtr] != ARRAY_TYPE) {
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
}
return proto(ptr);
}
public short getVals() {
return Util.getShort(
heap, (short) (KMType.instanceTable[KM_KEY_CHARACTERISTICS_OFFSET] + TLV_HEADER_SIZE));
}
public short length() {
short arrPtr = getVals();
return KMArray.cast(arrPtr).length();
}
public short getKeystoreEnforced() {
short arrPtr = getVals();
return KMArray.cast(arrPtr).get(KEYSTORE_ENFORCED);
}
public void setKeystoreEnforced(short ptr) {
KMKeyParameters.cast(ptr);
short arrPtr = getVals();
KMArray.cast(arrPtr).add(KEYSTORE_ENFORCED, ptr);
}
public short getTeeEnforced() {
short arrPtr = getVals();
return KMArray.cast(arrPtr).get(TEE_ENFORCED);
}
public void setTeeEnforced(short ptr) {
KMKeyParameters.cast(ptr);
short arrPtr = getVals();
KMArray.cast(arrPtr).add(TEE_ENFORCED, ptr);
}
public short getStrongboxEnforced() {
short arrPtr = getVals();
return KMArray.cast(arrPtr).get(STRONGBOX_ENFORCED);
}
public void setStrongboxEnforced(short ptr) {
KMKeyParameters.cast(ptr);
short arrPtr = getVals();
KMArray.cast(arrPtr).add(STRONGBOX_ENFORCED, ptr);
}
}
|
