append.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2022 Cameron Katri.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY CAMERON KATRI AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL CAMERON KATRI OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include <errno.h>
  29 #include <getopt.h>
  30 #include <stdbool.h>
  31 #include <stdint.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #include "trustcache.h"
  37 #include "uuid/uuid.h"
  38
  39 int
  40 tcappend(int argc, char **argv)
  41 {
  42         int keepuuid = 0;
  43         uuid_t uuid;
  44         const char *errstr = NULL;
  45         uint8_t flags = 0;
  46
  47         int ch;
  48         while ((ch = getopt(argc, argv, "u:f:")) != -1) {
  49                 switch (ch) {
  50                         case 'u':
  51                                 if (strlen(optarg) == 1 && *optarg == '0') {
  52                                         keepuuid = 1;
  53                                 } else {
  54                                         if (uuid_parse(optarg, uuid) != 0) {
  55                                                 fprintf(stderr, "Failed to parse %s as a UUID\n", optarg);
  56                                         } else
  57                                                 keepuuid = 2;
  58                                 }
  59                                 break;
  60                         case 'f':
  61                                 flags = strtonum(optarg, 0, UINT8_MAX, &errstr);
  62                                 if (errstr != NULL) {
  63                                         fprintf(stderr, "flag number is %s: %s\n", errstr, optarg);
  64                                         exit(1);
  65                                 }
  66                                 break;
  67                 }
  68         }
  69
  70         argc -= optind;
  71         argv += optind;
  72
  73         if (argc < 2)
  74                 return -1;
  75
  76         FILE *f = NULL;
  77         struct trust_cache cache = opentrustcache(argv[0]);
  78         struct trust_cache append = {
  79                 .version = cache.version,
  80                 .num_entries = 0
  81         };
  82
  83         for (int i = 1; i < argc; i++) {
  84                 append = cache_from_tree(argv[i], cache.version);
  85                 if (append.version == 0) {
  86                         if ((cache.hashes = realloc(cache.hashes, sizeof(trust_cache_hash0) *
  87                                                         (cache.num_entries + append.num_entries))) == NULL)
  88                                 exit(1);
  89                         for (uint32_t j = 0; j < append.num_entries; j++) {
  90                                 memcpy(cache.hashes[cache.num_entries + j], append.hashes[j], CS_CDHASH_LEN);
  91                         }
  92                 } else if (append.version == 1) {
  93                         if ((cache.entries = realloc(cache.entries, sizeof(struct trust_cache_entry1) *
  94                                                         (cache.num_entries + append.num_entries))) == NULL)
  95                                 exit(1);
  96                         for (uint32_t j = 0; j < append.num_entries; j++) {
  97                                 cache.entries[cache.num_entries + j].hash_type = append.entries[j].hash_type;
  98                                 cache.entries[cache.num_entries + j].flags = flags != 0 ? flags : append.entries[j].flags;
  99                                 memcpy(cache.entries[cache.num_entries + j].cdhash, append.entries[j].cdhash, CS_CDHASH_LEN);
 100                         }
 101                 }
 102                 free(append.hashes);
 103                 cache.num_entries += append.num_entries;
 104         }
 105
 106         if (cache.version == 1)
 107                 mergesort(cache.entries, cache.num_entries, sizeof(*cache.entries), ent_cmp);
 108         else if (cache.version == 0)
 109                 mergesort(cache.hashes, cache.num_entries, sizeof(*cache.hashes), hash_cmp);
 110
 111         switch (keepuuid) {
 112                 case 0:
 113                         uuid_generate(cache.uuid);
 114                         break;
 115                 case 1:
 116                         break;
 117                 case 2:
 118                         uuid_copy(cache.uuid, uuid);
 119                         break;
 120         }
 121
 122         if ((f = fopen(argv[0], "wb")) == NULL) {
 123                 fprintf(stderr, "%s: %s\n", argv[0], strerror(errno));
 124                 return 1;
 125         }
 126
 127         cache.version = htole32(cache.version);
 128         cache.num_entries = htole32(cache.num_entries);
 129         fwrite(&cache, sizeof(struct trust_cache) - sizeof(struct trust_cache_entry1*), 1, f);
 130         cache.version = le32toh(cache.version);
 131         cache.num_entries = le32toh(cache.num_entries);
 132
 133         for (uint32_t i = 0; i < cache.num_entries; i++) {
 134                 if (cache.version == 0)
 135                         fwrite(&cache.hashes[i], sizeof(trust_cache_hash0), 1, f);
 136                 else if (cache.version == 1)
 137                         fwrite(&cache.entries[i], sizeof(struct trust_cache_entry1), 1, f);
 138         }
 139
 140         return 0;
 141 }