| /* |
| * 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. |
| */ |
| |
| #include "JavacardKeyMintUtils.h" |
| #include <android-base/logging.h> |
| #include <cppbor.h> |
| |
| namespace aidl::android::hardware::security::keymint::km_utils { |
| |
| keymaster_key_param_t kInvalidTag{.tag = KM_TAG_INVALID, .integer = 0}; |
| |
| KeyParameter kmEnumParam2Aidl(const keymaster_key_param_t& param) { |
| switch (param.tag) { |
| case KM_TAG_PURPOSE: |
| return KeyParameter{Tag::PURPOSE, KeyParameterValue::make<KeyParameterValue::keyPurpose>( |
| static_cast<KeyPurpose>(param.enumerated))}; |
| case KM_TAG_ALGORITHM: |
| return KeyParameter{Tag::ALGORITHM, KeyParameterValue::make<KeyParameterValue::algorithm>( |
| static_cast<Algorithm>(param.enumerated))}; |
| case KM_TAG_BLOCK_MODE: |
| return KeyParameter{Tag::BLOCK_MODE, KeyParameterValue::make<KeyParameterValue::blockMode>( |
| static_cast<BlockMode>(param.enumerated))}; |
| case KM_TAG_DIGEST: |
| return KeyParameter{Tag::DIGEST, KeyParameterValue::make<KeyParameterValue::digest>( |
| static_cast<Digest>(param.enumerated))}; |
| case KM_TAG_PADDING: |
| return KeyParameter{Tag::PADDING, KeyParameterValue::make<KeyParameterValue::paddingMode>( |
| static_cast<PaddingMode>(param.enumerated))}; |
| case KM_TAG_EC_CURVE: |
| return KeyParameter{Tag::EC_CURVE, KeyParameterValue::make<KeyParameterValue::ecCurve>( |
| static_cast<EcCurve>(param.enumerated))}; |
| case KM_TAG_USER_AUTH_TYPE: |
| return KeyParameter{Tag::USER_AUTH_TYPE, |
| KeyParameterValue::make<KeyParameterValue::hardwareAuthenticatorType>( |
| static_cast<HardwareAuthenticatorType>(param.enumerated))}; |
| case KM_TAG_ORIGIN: |
| return KeyParameter{Tag::ORIGIN, KeyParameterValue::make<KeyParameterValue::origin>( |
| static_cast<KeyOrigin>(param.enumerated))}; |
| case KM_TAG_BLOB_USAGE_REQUIREMENTS: |
| case KM_TAG_KDF: |
| default: |
| return KeyParameter{Tag::INVALID, false}; |
| } |
| } |
| |
| |
| KeyParameter kmParam2Aidl(const keymaster_key_param_t& param) { |
| auto tag = legacy_enum_conversion(param.tag); |
| switch (typeFromTag(param.tag)) { |
| case KM_ENUM: |
| case KM_ENUM_REP: |
| return kmEnumParam2Aidl(param); |
| break; |
| |
| case KM_UINT: |
| case KM_UINT_REP: |
| return KeyParameter{tag, |
| KeyParameterValue::make<KeyParameterValue::integer>(param.integer)}; |
| |
| case KM_ULONG: |
| case KM_ULONG_REP: |
| return KeyParameter{ |
| tag, KeyParameterValue::make<KeyParameterValue::longInteger>(param.long_integer)}; |
| break; |
| |
| case KM_DATE: |
| return KeyParameter{tag, |
| KeyParameterValue::make<KeyParameterValue::dateTime>(param.date_time)}; |
| break; |
| |
| case KM_BOOL: |
| return KeyParameter{tag, param.boolean}; |
| break; |
| |
| case KM_BIGNUM: |
| case KM_BYTES: |
| return {tag, KeyParameterValue::make<KeyParameterValue::blob>( |
| std::vector(param.blob.data, param.blob.data + param.blob.data_length))}; |
| break; |
| |
| case KM_INVALID: |
| default: |
| CHECK(false) << "Unknown or unused tag type: Something is broken"; |
| return KeyParameter{Tag::INVALID, false}; |
| break; |
| } |
| } |
| |
| vector<KeyParameter> kmParamSet2Aidl(const keymaster_key_param_set_t& set) { |
| vector<KeyParameter> result; |
| if (set.length == 0 || set.params == nullptr) return result; |
| |
| result.reserve(set.length); |
| for (size_t i = 0; i < set.length; ++i) { |
| result.push_back(kmParam2Aidl(set.params[i])); |
| } |
| return result; |
| } |
| |
| template <KeyParameterValue::Tag aidl_tag> |
| keymaster_key_param_t aidlEnumVal2Km(keymaster_tag_t km_tag, const KeyParameterValue& value) { |
| return value.getTag() == aidl_tag |
| ? keymaster_param_enum(km_tag, static_cast<uint32_t>(value.get<aidl_tag>())) |
| : kInvalidTag; |
| } |
| |
| keymaster_key_param_t aidlEnumParam2Km(const KeyParameter& param) { |
| auto tag = legacy_enum_conversion(param.tag); |
| switch (tag) { |
| case KM_TAG_PURPOSE: |
| return aidlEnumVal2Km<KeyParameterValue::keyPurpose>(tag, param.value); |
| case KM_TAG_ALGORITHM: |
| return aidlEnumVal2Km<KeyParameterValue::algorithm>(tag, param.value); |
| case KM_TAG_BLOCK_MODE: |
| return aidlEnumVal2Km<KeyParameterValue::blockMode>(tag, param.value); |
| case KM_TAG_DIGEST: |
| case KM_TAG_RSA_OAEP_MGF_DIGEST: |
| return aidlEnumVal2Km<KeyParameterValue::digest>(tag, param.value); |
| case KM_TAG_PADDING: |
| return aidlEnumVal2Km<KeyParameterValue::paddingMode>(tag, param.value); |
| case KM_TAG_EC_CURVE: |
| return aidlEnumVal2Km<KeyParameterValue::ecCurve>(tag, param.value); |
| case KM_TAG_USER_AUTH_TYPE: |
| return aidlEnumVal2Km<KeyParameterValue::hardwareAuthenticatorType>(tag, param.value); |
| case KM_TAG_ORIGIN: |
| return aidlEnumVal2Km<KeyParameterValue::origin>(tag, param.value); |
| case KM_TAG_BLOB_USAGE_REQUIREMENTS: |
| case KM_TAG_KDF: |
| default: |
| CHECK(false) << "Unknown or unused enum tag: Something is broken"; |
| return keymaster_param_enum(tag, false); |
| } |
| } |
| |
| |
| |
| keymaster_error_t legacyHardwareAuthToken(const HardwareAuthToken& aidlToken, |
| LegacyHardwareAuthToken* legacyToken) { |
| legacyToken->challenge = aidlToken.challenge; |
| legacyToken->user_id = aidlToken.userId; |
| legacyToken->authenticator_id = aidlToken.authenticatorId; |
| legacyToken->authenticator_type = |
| static_cast<hw_authenticator_type_t>(aidlToken.authenticatorType); |
| legacyToken->timestamp = aidlToken.timestamp.milliSeconds; |
| Vec2KmBlob(aidlToken.mac, &legacyToken->mac); |
| return KM_ERROR_OK; |
| } |
| |
| keymaster_error_t encodeTimestampToken(const TimeStampToken& timestampToken, |
| vector<uint8_t>* encodedToken) { |
| cppbor::Array array; |
| ::keymaster::TimestampToken token; |
| array.add(static_cast<uint64_t>(timestampToken.challenge)); |
| array.add(static_cast<uint64_t>(timestampToken.timestamp.milliSeconds)); |
| array.add(timestampToken.mac); |
| *encodedToken = array.encode(); |
| return KM_ERROR_OK; |
| } |
| |
| keymaster_key_param_set_t aidlKeyParams2Km(const vector<KeyParameter>& keyParams) { |
| keymaster_key_param_set_t set; |
| |
| set.params = static_cast<keymaster_key_param_t*>( |
| malloc(keyParams.size() * sizeof(keymaster_key_param_t))); |
| set.length = keyParams.size(); |
| |
| for (size_t i = 0; i < keyParams.size(); ++i) { |
| const auto& param = keyParams[i]; |
| auto tag = legacy_enum_conversion(param.tag); |
| switch (typeFromTag(tag)) { |
| |
| case KM_ENUM: |
| case KM_ENUM_REP: |
| set.params[i] = aidlEnumParam2Km(param); |
| break; |
| |
| case KM_UINT: |
| case KM_UINT_REP: |
| set.params[i] = |
| param.value.getTag() == KeyParameterValue::integer |
| ? keymaster_param_int(tag, param.value.get<KeyParameterValue::integer>()) |
| : kInvalidTag; |
| break; |
| |
| case KM_ULONG: |
| case KM_ULONG_REP: |
| set.params[i] = |
| param.value.getTag() == KeyParameterValue::longInteger |
| ? keymaster_param_long(tag, param.value.get<KeyParameterValue::longInteger>()) |
| : kInvalidTag; |
| break; |
| |
| case KM_DATE: |
| set.params[i] = |
| param.value.getTag() == KeyParameterValue::dateTime |
| ? keymaster_param_date(tag, param.value.get<KeyParameterValue::dateTime>()) |
| : kInvalidTag; |
| break; |
| |
| case KM_BOOL: |
| set.params[i] = keymaster_param_bool(tag); |
| break; |
| |
| case KM_BIGNUM: |
| case KM_BYTES: |
| if (param.value.getTag() == KeyParameterValue::blob) { |
| const auto& value = param.value.get<KeyParameterValue::blob>(); |
| uint8_t* copy = static_cast<uint8_t*>(malloc(value.size())); |
| std::copy(value.begin(), value.end(), copy); |
| set.params[i] = keymaster_param_blob(tag, copy, value.size()); |
| } else { |
| set.params[i] = kInvalidTag; |
| } |
| break; |
| |
| case KM_INVALID: |
| default: |
| CHECK(false) << "Invalid tag: Something is broken"; |
| set.params[i].tag = KM_TAG_INVALID; |
| /* just skip */ |
| break; |
| } |
| } |
| |
| return set; |
| } |
| |
| } // namespace aidl::android::hardware::security::keymint |
