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/* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "trunnel/ed25519_cert.h"
#include "lib/cc/torint.h" /* TOR_PRIdSZ */
#include "lib/crypt_ops/crypto_format.h"
#include "lib/malloc/malloc.h"
#include "lib/encoding/time_fmt.h"
int
main(int argc, char **argv)
{
ed25519_cert_t *cert = NULL;
char rfc1123_buf[RFC1123_TIME_LEN+1] = "";
if (argc != 2) {
fprintf(stderr, "Usage:\n");
fprintf(stderr, "%s <path to ed25519_signing_cert file>\n", argv[0]);
return -1;
}
const char *filepath = argv[1];
char *got_tag = NULL;
uint8_t certbuf[256];
ssize_t cert_body_len = crypto_read_tagged_contents_from_file(
filepath, "ed25519v1-cert",
&got_tag, certbuf, sizeof(certbuf));
if (cert_body_len <= 0) {
fprintf(stderr, "crypto_read_tagged_contents_from_file failed with "
"error: %s\n", strerror(errno));
return -2;
}
if (!got_tag) {
fprintf(stderr, "Found no tag\n");
return -3;
}
if (strcmp(got_tag, "type4") != 0) {
fprintf(stderr, "Wrong tag: %s\n", got_tag);
return -4;
}
tor_free(got_tag);
ssize_t parsed = ed25519_cert_parse(&cert, certbuf, cert_body_len);
if (parsed <= 0) {
fprintf(stderr, "ed25519_cert_parse failed with return value %" TOR_PRIdSZ
"\n", parsed);
return -5;
}
time_t expires_at = (time_t)cert->exp_field * 60 * 60;
printf("Expires at: %s", ctime(&expires_at));
format_rfc1123_time(rfc1123_buf, expires_at);
printf("RFC 1123 timestamp: %s\n", rfc1123_buf);
printf("UNIX timestamp: %ld\n", (long int)expires_at);
ed25519_cert_free(cert);
return 0;
}
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