forked from pool/cryptsetup
88 lines
2.3 KiB
Diff
88 lines
2.3 KiB
Diff
add timeout option -t
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Signed-off-by: Ludwig Nussel <ludwig.nussel@suse.de>
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Index: hashalot-0.3/hashalot.c
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===================================================================
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--- hashalot-0.3.orig/hashalot.c
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+++ hashalot-0.3/hashalot.c
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@@ -21,6 +21,7 @@
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#include <string.h>
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#include <unistd.h>
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#include <assert.h>
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+#include <signal.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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@@ -36,6 +37,12 @@
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typedef int (*phash_func_t)(char dest[], size_t dest_len, const char src[], size_t src_len);
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+static int got_timeout;
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+void alrm_handler(int num)
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+{
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+ got_timeout = 1;
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+}
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+
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static int
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phash_rmd160(char dest[], size_t dest_len, const char src[], size_t src_len)
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{
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@@ -101,9 +108,9 @@ show_usage(const char argv0[])
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fprintf (stdout,
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"usage:\n"
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- " hashalot [ -x ] [ -s SALT ] [ -n _#bytes_ ] [ -C itercountk ] HASHTYPE\n"
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+ " hashalot [ -t secs ] [ -x ] [ -s SALT ] [ -n _#bytes_ ] [ -C itercountk ] HASHTYPE\n"
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" or\n"
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- " HASHTYPE [ -x ] [ -s SALT ] [ -n _#bytes_ ] [ -C itercountk ]\n"
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+ " HASHTYPE [ -t secs ] [ -x ] [ -s SALT ] [ -n _#bytes_ ] [ -C itercountk ]\n"
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"\n"
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"supported values for HASHTYPE: ");
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@@ -222,8 +229,9 @@ main(int argc, char *argv[])
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phash_func_t func;
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int hex_output = 0, c;
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unsigned long itercountk = 0;
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+ unsigned timeout = 0;
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- while ((c = getopt(argc, argv, "n:s:xC:")) != -1) {
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+ while ((c = getopt(argc, argv, "n:s:xC:t:")) != -1) {
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switch (c) {
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case 'n':
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hashlen = strtoul(optarg, &p, 0);
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@@ -238,6 +246,9 @@ main(int argc, char *argv[])
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case 's':
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salt = optarg;
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break;
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+ case 't':
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+ timeout = atoi(optarg);
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+ break;
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case 'x':
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hex_output++;
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break;
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@@ -276,8 +287,24 @@ main(int argc, char *argv[])
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fputs("Warning: couldn't lock memory, are you root?\n", stderr);
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}
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+ if(timeout) {
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+ struct sigaction sa;
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+ sa.sa_handler = alrm_handler;
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+ sigemptyset (&sa.sa_mask);
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+ sa.sa_flags = 0;
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+ sigaction(SIGALRM, &sa, NULL);
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+ alarm(timeout);
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+ }
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+
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/* here we acquire the precious passphrase... */
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pass = xgetpass("Enter passphrase: ");
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+ if(got_timeout) {
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+ exit(EXIT_FAILURE);
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+ }
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+ if(timeout) {
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+ alarm(0);
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+ }
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+
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if (salt)
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pass = salt_passphrase(pass, salt);
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hashlen = func(passhash, hashlen, pass, strlen(pass));
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