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/****************************************************************************
**
** Copyright (C) 2021 Intel Corporation
**
** Permission is hereby granted, free of charge, to any person obtaining a copy
** of this software and associated documentation files (the "Software"), to deal
** in the Software without restriction, including without limitation the rights
** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
** copies of the Software, and to permit persons to whom the Software is
** furnished to do so, subject to the following conditions:
**
** The above copyright notice and this permission notice shall be included in
** all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
** THE SOFTWARE.
**
****************************************************************************/
#define _POSIX_C_SOURCE 200809L
#include "cbor.h"
#include "cborjson.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
void *xrealloc(void *old, size_t size, const char *fname)
{
old = realloc(old, size);
if (old == NULL) {
fprintf(stderr, "%s: %s\n", fname, strerror(errno));
exit(EXIT_FAILURE);
}
return old;
}
void printerror(CborError err, const char *fname)
{
fprintf(stderr, "%s: %s\n", fname, cbor_error_string(err));
exit(EXIT_FAILURE);
}
void dumpFile(FILE *in, const char *fname, bool printJson, int flags)
{
static const size_t chunklen = 16 * 1024;
static size_t bufsize = 0;
static uint8_t *buffer = NULL;
size_t buflen = 0;
do {
if (bufsize == buflen)
buffer = xrealloc(buffer, bufsize += chunklen, fname);
size_t n = fread(buffer + buflen, 1, bufsize - buflen, in);
buflen += n;
if (n == 0) {
if (!ferror(in))
continue;
fprintf(stderr, "%s: %s\n", fname, strerror(errno));
exit(EXIT_FAILURE);
}
} while (!feof(in));
CborParser parser;
CborValue value;
CborError err = cbor_parser_init(buffer, buflen, 0, &parser, &value);
if (!err) {
if (printJson)
err = cbor_value_to_json_advance(stdout, &value, flags);
else
err = cbor_value_to_pretty_advance_flags(stdout, &value, flags);
if (!err)
puts("");
}
if (!err && cbor_value_get_next_byte(&value) != buffer + buflen)
err = CborErrorGarbageAtEnd;
if (err)
printerror(err, fname);
}
int main(int argc, char **argv)
{
bool printJson = false;
int json_flags = CborConvertDefaultFlags;
int cbor_flags = CborPrettyDefaultFlags;
int c;
while ((c = getopt(argc, argv, "MOSUcjhfn")) != -1) {
switch (c) {
case 'c':
printJson = false;
break;
case 'j':
printJson = true;
break;
case 'f':
cbor_flags |= CborPrettyShowStringFragments;
break;
case 'n':
cbor_flags |= CborPrettyIndicateIndeterminateLength | CborPrettyNumericEncodingIndicators;
break;
case 'M':
json_flags |= CborConvertAddMetadata;
break;
case 'O':
json_flags |= CborConvertTagsToObjects;
break;
case 'S':
json_flags |= CborConvertStringifyMapKeys;
break;
case 'U':
json_flags |= CborConvertByteStringsToBase64Url;
break;
case '?':
fprintf(stderr, "Unknown option -%c.\n", optopt);
/* fall through */
case 'h':
puts("Usage: cbordump [OPTION]... [FILE]...\n"
"Interprets FILEs as CBOR binary data and dumps the content to stdout.\n"
"\n"
"Options:\n"
" -c Print a CBOR dump (see RFC 7049) (default)\n"
" -j Print a JSON equivalent version\n"
" -h Print this help output and exit\n"
"When JSON output is active, the following options are recognized:\n"
" -M Add metadata so converting back to CBOR is possible\n"
" -O Convert CBOR tags to JSON objects\n"
" -S Stringify non-text string map keys\n"
" -U Convert all CBOR byte strings to Base64url regardless of tags\n"
"When CBOR dump is active, the following options are recognized:\n"
" -f Show text and byte string fragments\n"
" -n Show overlong encoding of CBOR numbers and length"
"");
return c == '?' ? EXIT_FAILURE : EXIT_SUCCESS;
}
}
char **fname = argv + optind;
if (!*fname) {
dumpFile(stdin, "-", printJson, printJson ? json_flags : cbor_flags);
} else {
for ( ; *fname; ++fname) {
FILE *in = fopen(*fname, "rb");
if (!in) {
perror("open");
return EXIT_FAILURE;
}
dumpFile(in, *fname, printJson, printJson ? json_flags : cbor_flags);
fclose(in);
}
}
return EXIT_SUCCESS;
}
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