Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 1 | /* |
| 2 | ** |
| 3 | ** Copyright 2016, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #ifndef KEYSTORE_KEYSTORE_AIDL_HIDL_MARSHALLING_UTILS_H_ |
| 19 | #define KEYSTORE_KEYSTORE_AIDL_HIDL_MARSHALLING_UTILS_H_ |
| 20 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 21 | #include <utility> |
| 22 | |
Shawn Willden | bb22a6c | 2017-12-06 19:35:28 -0700 | [diff] [blame] | 23 | #include <binder/Parcel.h> |
| 24 | |
| 25 | #include <keystore/keymaster_types.h> |
| 26 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 27 | namespace keystore { |
| 28 | |
| 29 | template <typename Fn, typename... Args> |
| 30 | inline auto nullable(Fn fn, const android::Parcel& in, Args&&... args) |
| 31 | -> NullOr<decltype(fn(in, std::forward<Args>(args)...))> { |
| 32 | if (in.readInt32() != 1) { |
| 33 | return {}; |
| 34 | } |
| 35 | |
| 36 | return fn(in, std::forward<Args>(args)...); |
| 37 | } |
| 38 | template <typename Fn, typename Arg> |
| 39 | inline android::status_t nullable(Fn fn, const NullOr<Arg>& arg, android::Parcel* out) { |
| 40 | if (!arg.isOk()) { |
| 41 | return out->writeInt32(0); |
| 42 | } |
| 43 | auto rc = out->writeInt32(1); |
| 44 | if (rc != ::android::OK) return rc; |
| 45 | |
| 46 | return fn(arg.value(), out); |
| 47 | } |
| 48 | template <typename Fn, typename Arg> |
| 49 | inline android::status_t nullable(Fn fn, Arg&& arg, android::Parcel* out) { |
| 50 | auto rc = out->writeInt32(1); |
| 51 | if (rc != ::android::OK) return rc; |
| 52 | |
| 53 | return fn(std::forward<Arg>(arg), out); |
| 54 | } |
| 55 | |
| 56 | inline android::status_t nullable(android::Parcel* out) { |
| 57 | return out->writeInt32(0); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * makes a copy only if inPlace is false |
| 62 | */ |
Rob Barnes | bb6cabd | 2018-10-04 17:10:37 -0600 | [diff] [blame] | 63 | hidl_vec<uint8_t> readKeymasterBlob(const android::Parcel& in); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 64 | android::status_t writeKeymasterBlob(const hidl_vec<uint8_t>& blob, android::Parcel* out); |
| 65 | |
| 66 | NullOr<hidl_vec<uint8_t>> readBlobAsByteArray(const android::Parcel& in, bool inPlace = true); |
| 67 | android::status_t writeBlobAsByteArray(const NullOr<const hidl_vec<uint8_t>&>& blob, |
| 68 | android::Parcel* out); |
| 69 | |
| 70 | NullOr<KeyParameter> readKeyParameterFromParcel(const android::Parcel& in); |
| 71 | android::status_t writeKeyParameterToParcel(const KeyParameter& param, android::Parcel* out); |
| 72 | |
| 73 | hidl_vec<KeyParameter> readParamSetFromParcel(const android::Parcel& in); |
| 74 | android::status_t writeParamSetToParcel(const hidl_vec<KeyParameter>& params, android::Parcel* out); |
| 75 | |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 76 | hidl_vec<hidl_vec<uint8_t>> readCertificateChainFromParcel(const android::Parcel& in); |
Janis Danisevskis | c7a9fa2 | 2016-10-13 18:43:45 +0100 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | #endif // KEYSTORE_KEYSTORE_AIDL_HIDL_MARSHALLING_UTILS_H_ |