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/*-
* Copyright (c) 2012 Alistair Crooks <agc@NetBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <sys/types.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "verify.h"
#include "array.h"
/* print the time nicely */
static void
ptime(int64_t secs)
{
time_t t;
t = (time_t)secs;
printf("%s", ctime(&t));
}
/* print entry n */
static void
pentry(pgpv_t *pgp, int n)
{
char *s;
pgpv_get_entry(pgp, (unsigned)n, &s);
printf("%s", s);
free(s);
}
#define MB(x) ((x) * 1024 * 1024)
/* get stdin into memory so we can verify it */
static char *
getstdin(ssize_t *cc, size_t *size)
{
size_t newsize;
char *newin;
char *in;
int rc;
*cc = 0;
*size = 0;
in = NULL;
do {
newsize = *size + MB(1);
if ((newin = realloc(in, newsize)) == NULL) {
break;
}
in = newin;
*size = newsize;
if ((rc = read(STDIN_FILENO, &in[*cc], newsize - *cc)) > 0) {
*cc += rc;
}
} while (rc > 0);
return in;
}
/* verify memory or file */
static int
verify_data(pgpv_t *pgp, const char *cmd, const char *inname, char *in, ssize_t cc)
{
pgpv_cursor_t cursor;
size_t size;
size_t cookie;
char *data;
memset(&cursor, 0x0, sizeof(cursor));
if (strcasecmp(cmd, "cat") == 0) {
if ((cookie = pgpv_verify(&cursor, pgp, in, cc)) != 0) {
if ((size = pgpv_get_verified(&cursor, cookie, &data)) > 0) {
write(STDOUT_FILENO, data, size);
}
return 1;
}
} else if (strcasecmp(cmd, "verify") == 0) {
if (pgpv_verify(&cursor, pgp, in, cc)) {
printf("Good signature for %s made ", inname);
ptime(cursor.sigtime);
pentry(pgp, ARRAY_ELEMENT(cursor.found, 0));
return 1;
}
fprintf(stderr, "Signature did not match contents -- %s", cursor.why);
} else {
fprintf(stderr, "unrecognised command \"%s\"", cmd);
}
return 0;
}
int
main(int argc, char **argv)
{
const char *keyring;
const char *cmd;
ssize_t cc;
size_t size;
pgpv_t pgp;
char *in;
int ok;
int i;
memset(&pgp, 0x0, sizeof(pgp));
keyring = NULL;
ok = 1;
cmd = "verify";
while ((i = getopt(argc, argv, "c:k:v")) != -1) {
switch(i) {
case 'c':
cmd = optarg;
break;
case 'k':
keyring = optarg;
break;
case 'v':
printf("%s\n", NETPGPVERIFY_VERSION);
exit(EXIT_SUCCESS);
default:
break;
}
}
if (!pgpv_read_pubring(&pgp, keyring, -1)) {
errx(EXIT_FAILURE, "can't read keyring");
}
if (optind == argc) {
in = getstdin(&cc, &size);
ok = verify_data(&pgp, cmd, "[stdin]", in, cc);
} else {
for (ok = 1, i = optind ; i < argc ; i++) {
if (!verify_data(&pgp, cmd, argv[i], argv[i], -1)) {
ok = 0;
}
}
}
pgpv_close(&pgp);
exit((ok) ? EXIT_SUCCESS : EXIT_FAILURE);
}
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