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Commit 3c8a004a authored by Tri Vo's avatar Tri Vo
Browse files

trusty: coverage: Add UUID helpers 

Function to parse string was borrowed from Trusty.

Bug: 171750250
Test: trusty_test_fuzzer
Change-Id: I8430579f142db2c174874aff373bce6bb868de31
parent 1d976420

trusty/coverage/Android.bp

+2 −0
Original line number Diff line number Diff line
@@ -21,12 +21,14 @@ cc_library { 
    vendor_available: true,

    srcs: [

        "coverage.cpp",

        "uuid.cpp",

    ],

    export_include_dirs: [

        "include",

    ],

    shared_libs: [

        "libbase",

        "libext2_uuid",

        "liblog",

        "libdmabufheap",

        "libtrusty",

trusty/coverage/include/trusty/coverage/tipc.h

+1 −7
Original line number Diff line number Diff line
@@ -19,16 +19,10 @@ 
#pragma once



#include <stdint.h>

#include <trusty/coverage/uuid.h>



#define COVERAGE_CLIENT_PORT "com.android.trusty.coverage.client"



struct uuid {

    uint32_t time_low;

    uint16_t time_mid;

    uint16_t time_hi_and_version;

    uint8_t clock_seq_and_node[8];

};



enum coverage_client_cmd {

    COVERAGE_CLIENT_CMD_RESP_BIT = 1U,

    COVERAGE_CLIENT_CMD_SHIFT = 1U,

trusty/coverage/include/trusty/coverage/uuid.h

0 → 100644
+35 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2021 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.

 */



#pragma once



#include <stdint.h>



struct uuid {

    uint32_t time_low;

    uint16_t time_mid;

    uint16_t time_hi_and_version;

    uint8_t clock_seq_and_node[8];

};



/**

 * str_to_uuid() - Converts a C string into a uuid

 * @str: C-string representation of the uuid

 * @uuid: &struct uuid to fill with the converted uuid

 *

 * Return: true on success, false otherwise

 */

bool str_to_uuid(const char* str, struct uuid* uuid);

trusty/coverage/uuid.cpp

0 → 100644
+44 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2021 The Android Open Sourete 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 <string.h>

#include <trusty/coverage/uuid.h>

#include <uuid.h>



#include <stdio.h>



static uint16_t reverse_u16(uint16_t u) {

    return u << 8 | u >> 8;

}



static uint32_t reverse_u32(uint32_t u) {

    return reverse_u16((uint16_t)u) << 16 | reverse_u16(u >> 16);

}



bool str_to_uuid(const char* str, struct uuid* uuid) {

    uuid_t uu;

    static_assert(sizeof(uu) == sizeof(*uuid));



    if (uuid_parse(str, uu)) {

        return false;

    }



    memcpy(uuid, uu, sizeof(*uuid));

    uuid->time_low = reverse_u32(uuid->time_low);

    uuid->time_mid = reverse_u16(uuid->time_mid);

    uuid->time_hi_and_version = reverse_u16(uuid->time_hi_and_version);

    return true;

}