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/*
* Copyright 2017 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.
*/
#ifndef TRUSTY_APP_KEYMASTER_TRUSTY_KEYMASTER_MESSAGES_H_
#define TRUSTY_APP_KEYMASTER_TRUSTY_KEYMASTER_MESSAGES_H_
#include <keymaster/android_keymaster_messages.h>
namespace keymaster {
static inline bool copy_keymaster_algorithm_from_buf(
const uint8_t** buf_ptr,
const uint8_t* end,
keymaster_algorithm_t* state) {
uint32_t val;
if (copy_uint32_from_buf(buf_ptr, end, &val)) {
switch (val) {
case KM_ALGORITHM_RSA:
case KM_ALGORITHM_EC:
case KM_ALGORITHM_AES:
case KM_ALGORITHM_TRIPLE_DES:
case KM_ALGORITHM_HMAC:
*state = static_cast<keymaster_algorithm_t>(val);
return true;
default:
return false;
}
}
return false;
}
static inline bool copy_keymaster_verified_boot_from_buf(
const uint8_t** buf_ptr,
const uint8_t* end,
keymaster_verified_boot_t* state) {
uint32_t val;
if (copy_uint32_from_buf(buf_ptr, end, &val)) {
switch (val) {
case KM_VERIFIED_BOOT_VERIFIED:
case KM_VERIFIED_BOOT_SELF_SIGNED:
case KM_VERIFIED_BOOT_UNVERIFIED:
case KM_VERIFIED_BOOT_FAILED:
*state = static_cast<keymaster_verified_boot_t>(val);
return true;
default:
return false;
}
}
return false;
}
/**
* Generic struct for Keymaster requests which hold a single raw buffer.
*/
struct RawBufferRequest : public KeymasterMessage {
explicit RawBufferRequest(int32_t ver) : KeymasterMessage(ver) {}
size_t SerializedSize() const override { return data.SerializedSize(); }
uint8_t* Serialize(uint8_t* buf, const uint8_t* end) const override {
return data.Serialize(buf, end);
}
bool Deserialize(const uint8_t** buf_ptr, const uint8_t* end) override {
return data.Deserialize(buf_ptr, end);
}
Buffer data;
};
/**
* Generic struct for Keymaster responses which hold a single raw buffer.
*/
struct RawBufferResponse : public KeymasterResponse {
explicit RawBufferResponse(int32_t ver) : KeymasterResponse(ver) {}
size_t NonErrorSerializedSize() const override {
return data.SerializedSize();
}
uint8_t* NonErrorSerialize(uint8_t* buf,
const uint8_t* end) const override {
return data.Serialize(buf, end);
}
bool NonErrorDeserialize(const uint8_t** buf_ptr,
const uint8_t* end) override {
return data.Deserialize(buf_ptr, end);
}
Buffer data;
};
struct SetBootParamsRequest : public KeymasterMessage {
explicit SetBootParamsRequest(int32_t ver) : KeymasterMessage(ver) {}
size_t SerializedSize() const override {
return (sizeof(os_version) + sizeof(os_patchlevel) +
sizeof(device_locked) + sizeof(verified_boot_state) +
verified_boot_key.SerializedSize() +
verified_boot_hash.SerializedSize());
}
uint8_t* Serialize(uint8_t* buf, const uint8_t* end) const override {
buf = append_uint32_to_buf(buf, end, os_version);
buf = append_uint32_to_buf(buf, end, os_patchlevel);
buf = append_uint32_to_buf(buf, end, device_locked);
buf = append_uint32_to_buf(buf, end, verified_boot_state);
buf = verified_boot_key.Serialize(buf, end);
return verified_boot_hash.Serialize(buf, end);
}
bool Deserialize(const uint8_t** buf_ptr, const uint8_t* end) override {
return copy_uint32_from_buf(buf_ptr, end, &os_version) &&
copy_uint32_from_buf(buf_ptr, end, &os_patchlevel) &&
copy_uint32_from_buf(buf_ptr, end, &device_locked) &&
copy_keymaster_verified_boot_from_buf(buf_ptr, end,
&verified_boot_state) &&
verified_boot_key.Deserialize(buf_ptr, end) &&
verified_boot_hash.Deserialize(buf_ptr, end);
}
uint32_t os_version;
uint32_t os_patchlevel;
uint32_t device_locked;
keymaster_verified_boot_t verified_boot_state;
Buffer verified_boot_key;
Buffer verified_boot_hash;
};
using SetBootParamsResponse = EmptyKeymasterResponse;
struct SetAttestationKeyRequest : public KeymasterMessage {
explicit SetAttestationKeyRequest(int32_t ver) : KeymasterMessage(ver) {}
size_t SerializedSize() const override {
return sizeof(uint32_t) + key_data.SerializedSize();
}
uint8_t* Serialize(uint8_t* buf, const uint8_t* end) const override {
buf = append_uint32_to_buf(buf, end, algorithm);
return key_data.Serialize(buf, end);
}
bool Deserialize(const uint8_t** buf_ptr, const uint8_t* end) override {
return copy_keymaster_algorithm_from_buf(buf_ptr, end, &algorithm) &&
key_data.Deserialize(buf_ptr, end);
}
keymaster_algorithm_t algorithm;
Buffer key_data;
};
using SetAttestationKeyResponse = EmptyKeymasterResponse;
struct ClearAttestationCertChainRequest : public KeymasterMessage {
explicit ClearAttestationCertChainRequest(int32_t ver)
: KeymasterMessage(ver) {}
size_t SerializedSize() const override { return sizeof(uint32_t); }
uint8_t* Serialize(uint8_t* buf, const uint8_t* end) const override {
return append_uint32_to_buf(buf, end, algorithm);
}
bool Deserialize(const uint8_t** buf_ptr, const uint8_t* end) override {
return copy_keymaster_algorithm_from_buf(buf_ptr, end, &algorithm);
}
keymaster_algorithm_t algorithm;
};
using ClearAttestationCertChainResponse = EmptyKeymasterResponse;
struct AppendAttestationCertChainRequest : public KeymasterMessage {
explicit AppendAttestationCertChainRequest(int32_t ver)
: KeymasterMessage(ver) {}
size_t SerializedSize() const override {
return sizeof(uint32_t) + cert_data.SerializedSize();
}
uint8_t* Serialize(uint8_t* buf, const uint8_t* end) const override {
buf = append_uint32_to_buf(buf, end, algorithm);
return cert_data.Serialize(buf, end);
}
bool Deserialize(const uint8_t** buf_ptr, const uint8_t* end) override {
return copy_keymaster_algorithm_from_buf(buf_ptr, end, &algorithm) &&
cert_data.Deserialize(buf_ptr, end);
}
keymaster_algorithm_t algorithm;
Buffer cert_data;
};
using AppendAttestationCertChainResponse = EmptyKeymasterResponse;
/**
* For Android Things Attestation Provisioning (ATAP), the GetCaRequest message
* in the protocol are raw opaque messages for the purposes of this IPC call.
* Since the SetCaResponse message will be very large (> 10k), SetCaResponse is
* split into *Begin, *Update, and *Finish operations.
*/
using AtapGetCaRequestRequest = RawBufferRequest;
using AtapGetCaRequestResponse = RawBufferResponse;
struct AtapSetCaResponseBeginRequest : public KeymasterMessage {
explicit AtapSetCaResponseBeginRequest(int32_t ver)
: KeymasterMessage(ver) {}
size_t SerializedSize() const override { return sizeof(uint32_t); }
uint8_t* Serialize(uint8_t* buf, const uint8_t* end) const override {
return append_uint32_to_buf(buf, end, ca_response_size);
}
bool Deserialize(const uint8_t** buf_ptr, const uint8_t* end) override {
return copy_uint32_from_buf(buf_ptr, end, &ca_response_size);
}
uint32_t ca_response_size;
};
using AtapSetCaResponseBeginResponse = EmptyKeymasterResponse;
using AtapSetCaResponseUpdateRequest = RawBufferRequest;
using AtapSetCaResponseUpdateResponse = EmptyKeymasterResponse;
using AtapSetCaResponseFinishRequest = EmptyKeymasterRequest;
using AtapSetCaResponseFinishResponse = EmptyKeymasterResponse;
using AtapSetProductIdRequest = RawBufferRequest;
using AtapSetProductIdResponse = EmptyKeymasterResponse;
using AtapReadUuidRequest = EmptyKeymasterRequest;
using AtapReadUuidResponse = RawBufferResponse;
} // namespace keymaster
#endif // TRUSTY_APP_KEYMASTER_TRUSTY_KEYMASTER_MESSAGES_H_
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