1 /* Copyright 2017 The Android Open Source Project
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions
5 * are met:
6 * 1. Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 * 2. Redistributions in binary form must reproduce the above copyright
9 * notice, this list of conditions and the following disclaimer in the
10 * documentation and/or other materials provided with the distribution.
11 *
12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
13 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
14 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
15 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
16 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
17 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
18 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
19 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
20 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
21 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
22
23 #include "keystore_backend_hidl.h"
24
25 #include <android/system/wifi/keystore/1.0/IKeystore.h>
26 #include <log/log.h>
27
28 using android::hardware::hidl_vec;
29 using android::hardware::Return;
30 using android::sp;
31 using android::system::wifi::keystore::V1_0::IKeystore;
32
sign(const char * key_id,const uint8_t * in,size_t len,uint8_t ** reply,size_t * reply_len)33 int32_t KeystoreBackendHidl::sign(
34 const char *key_id, const uint8_t* in, size_t len, uint8_t** reply,
35 size_t* reply_len) {
36 if (key_id == nullptr || in == nullptr || reply == nullptr || reply_len == nullptr) {
37 ALOGE("Null pointer argument passed");
38 return -1;
39 }
40
41 sp<IKeystore> service = IKeystore::tryGetService();
42 if (service == nullptr) {
43 ALOGE("could not contact keystore HAL");
44 return -1;
45 }
46
47 bool success = false;
48 auto cb = [&](IKeystore::KeystoreStatusCode status,
49 hidl_vec<uint8_t> signedData) {
50 if (status == IKeystore::KeystoreStatusCode::SUCCESS) {
51 *reply_len = signedData.size();
52 *reply = signedData.releaseData();
53 success = true;
54 }
55 };
56 Return<void> ret = service->sign(
57 key_id, std::vector<uint8_t>(in, in + len), cb);
58 if (!ret.isOk() || !success) {
59 return 1;
60 }
61 return 0;
62 }
63
get_pubkey(const char * key_id,uint8_t ** pubkey,size_t * pubkey_len)64 int32_t KeystoreBackendHidl::get_pubkey(
65 const char *key_id, uint8_t** pubkey, size_t* pubkey_len) {
66 if (key_id == nullptr || pubkey == nullptr || pubkey_len == nullptr) {
67 ALOGE("Null pointer argument passed");
68 return -1;
69 }
70
71 sp<IKeystore> service = IKeystore::tryGetService();
72 if (service == nullptr) {
73 ALOGE("could not contact keystore HAL");
74 return -1;
75 }
76
77 bool success = false;
78 auto cb = [&](IKeystore::KeystoreStatusCode status,
79 hidl_vec<uint8_t> publicKey) {
80 if (status == IKeystore::KeystoreStatusCode::SUCCESS) {
81 *pubkey_len = publicKey.size();
82 *pubkey = publicKey.releaseData();
83 success = true;
84 }
85 };
86 Return<void> ret = service->getPublicKey(key_id, cb);
87 if (!ret.isOk() || !success) {
88 return 1;
89 }
90 return 0;
91 }
92