diff options
Diffstat (limited to '')
| -rw-r--r-- | gasroot-setuid.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gasroot-setuid.c b/gasroot-setuid.c index ca0b6c6..b970e19 100644 --- a/gasroot-setuid.c +++ b/gasroot-setuid.c @@ -204,6 +204,17 @@ recvtext(int fd, char **bufp, size_t *sizep) } +static int +consttime_streq(const char *a, const char *b) +{ + size_t i; + int ret = 1; + for (i = 0; a[i] && b[i]; i++) + ret &= a[i] == b[i]; + return ret & !a[i] && !b[i]; +} + + int main(int argc, char *argv[]) { @@ -230,7 +241,7 @@ main(int argc, char *argv[]) sendtext(fd, "HELLO"); for (;;) { recvtext(fd, &passphrase, &passphrase_size); - if (!strcmp(crypt(passphrase, expected), expected)) + if (consttime_streq(crypt(passphrase, expected), expected)) break; wipe(passphrase); #if RETRY_SLEEP > 0 |