1 /*- 2 * Copyright (c) 2016 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 #include <stdint.h> 29 #include <string.h> 30 31 #include "endian.h" 32 #include "image.h" 33 #include "mkimg.h" 34 35 static void osdep_uuidgen(mkimg_uuid_t *); 36 37 #ifdef __APPLE__ 38 #include <uuid/uuid.h> 39 40 static void 41 osdep_uuidgen(mkimg_uuid_t *uuid) 42 { 43 44 uuid_generate_time((void *)uuid); 45 } 46 #endif /* __APPLE__ */ 47 48 #if defined(__linux__) || defined(__FreeBSD__) 49 #include <sys/time.h> 50 #include <stdlib.h> 51 52 static void 53 osdep_uuidgen(mkimg_uuid_t *uuid) 54 { 55 struct timeval tv; 56 uint64_t time = 0x01B21DD213814000LL; 57 u_int i; 58 uint16_t seq; 59 60 if (reproducible) 61 memset(&tv, 0, sizeof(tv)); 62 else if (gettimeofday(&tv, NULL) == -1) 63 abort(); 64 65 time += (uint64_t)tv.tv_sec * 10000000LL; 66 time += tv.tv_usec * 10; 67 68 uuid->time_low = (uint32_t)time; 69 uuid->time_mid = (uint16_t)(time >> 32); 70 uuid->time_hi_and_version = (uint16_t)(time >> 48) & 0xfff; 71 uuid->time_hi_and_version |= 1 << 12; 72 73 seq = random(); 74 75 uuid->clock_seq_hi_and_reserved = (uint8_t)(seq >> 8) & 0x3f; 76 uuid->clock_seq_low = (uint8_t)seq; 77 78 for (i = 0; i < 6; i++) 79 uuid->node[i] = (uint8_t)random(); 80 uuid->node[0] |= 0x01; 81 } 82 #endif /* __linux__ */ 83 84 void 85 mkimg_uuid(mkimg_uuid_t *uuid) 86 { 87 static uint8_t gen[sizeof(mkimg_uuid_t)]; 88 u_int i; 89 90 if (!unit_testing) { 91 osdep_uuidgen(uuid); 92 return; 93 } 94 95 for (i = 0; i < sizeof(gen); i++) 96 gen[i]++; 97 memcpy(uuid, gen, sizeof(*uuid)); 98 } 99 100 void 101 mkimg_uuid_enc(void *buf, const mkimg_uuid_t *uuid) 102 { 103 uint8_t *p = buf; 104 u_int i; 105 106 le32enc(p, uuid->time_low); 107 le16enc(p + 4, uuid->time_mid); 108 le16enc(p + 6, uuid->time_hi_and_version); 109 p[8] = uuid->clock_seq_hi_and_reserved; 110 p[9] = uuid->clock_seq_low; 111 for (i = 0; i < 6; i++) 112 p[10 + i] = uuid->node[i]; 113 } 114