1 /*
2  * Copyright 2020, The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #if !defined(EIC_INSIDE_LIBEIC_H) && !defined(EIC_COMPILATION)
18 #error "Never include this file directly, include libeic.h instead."
19 #endif
20 
21 #ifndef ANDROID_HARDWARE_IDENTITY_EIC_COMMON_H
22 #define ANDROID_HARDWARE_IDENTITY_EIC_COMMON_H
23 
24 // KeyMint auth-challenges are 64-bit numbers and 0 typically means unset.
25 #define EIC_KM_AUTH_CHALLENGE_UNSET 0
26 
27 // Feature version 202009:
28 //
29 //         CredentialKeys = [
30 //              bstr,   ; storageKey, a 128-bit AES key
31 //              bstr,   ; credentialPrivKey, the private key for credentialKey
32 //         ]
33 //
34 // Feature version 202101:
35 //
36 //         CredentialKeys = [
37 //              bstr,   ; storageKey, a 128-bit AES key
38 //              bstr,   ; credentialPrivKey, the private key for credentialKey
39 //              bstr    ; proofOfProvisioning SHA-256
40 //         ]
41 //
42 // where storageKey is 16 bytes, credentialPrivateKey is 32 bytes, and proofOfProvisioning
43 // SHA-256 is 32 bytes.
44 #define EIC_CREDENTIAL_KEYS_CBOR_SIZE_FEATURE_VERSION_202009 52
45 #define EIC_CREDENTIAL_KEYS_CBOR_SIZE_FEATURE_VERSION_202101 86
46 
47 #endif  // ANDROID_HARDWARE_IDENTITY_EIC_COMMON_H
48