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Use MAX_AUTH_TRIES rather than DEFAULT_AUTH_TRIES, don't limit argument range

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This commit is contained in:
Matt Johnston 2017-06-27 22:20:38 +08:00
parent 96382d52ab
commit 74ace058a6
4 changed files with 10 additions and 18 deletions
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9
default_options.h
View File

@ -380,17 +380,12 @@ Homedir is prepended unless path begins with / */
#define MAX_UNAUTH_CLIENTS 30
#endif
/* Maximum number of failed authentication tries (server option) */
/* Default maximum number of failed authentication tries (server option) */
/* -T runtime option overrides */
#ifndef MAX_AUTH_TRIES
#define MAX_AUTH_TRIES 10
#endif
/* Default maximum number of failed authentication tries.
* defaults to MAX_AUTH_TRIES */
#ifndef DEFAULT_AUTH_TRIES
#define DEFAULT_AUTH_TRIES MAX_AUTH_TRIES
#endif
/* The default file to store the daemon's process ID, for shutdown
scripts etc. This can be overridden with the -P flag */
#ifndef DROPBEAR_PIDFILE

7
default_options.h.in
View File

@ -258,13 +258,10 @@ Homedir is prepended unless path begins with / */
* come from many IPs */
#define MAX_UNAUTH_CLIENTS 30
/* Maximum number of failed authentication tries (server option) */
/* Default maximum number of failed authentication tries (server option) */
/* -T server option overrides */
#define MAX_AUTH_TRIES 10
/* Default maximum number of failed authentication tries.
* defaults to MAX_AUTH_TRIES */
#define DEFAULT_AUTH_TRIES MAX_AUTH_TRIES
/* The default file to store the daemon's process ID, for shutdown
scripts etc. This can be overridden with the -P flag */
#define DROPBEAR_PIDFILE "/var/run/dropbear.pid"

2
dropbear.8
View File

@ -92,7 +92,7 @@ if 0 disables keepalives. If no response is received for 3 consecutive keepalive
Disconnect the session if no traffic is transmitted or received for \fIidle_timeout\fR seconds.
.TP
.B \-T \fImax_authentication_attempts
Disconnect the session if number of authentication attempts is exceeded. default is set at compile time to DEFAULT_AUTH_TRIES which itself defaults to MAX_AUTH_TRIES (10)
Set the number of authentication attempts allowed per connection. If unspecified the default is 10 (MAX_AUTH_TRIES)
.TP
.B \-c \fIforced_command
Disregard the command provided by the user and always run \fIforced_command\fR. This also

10
svr-runopts.c
View File

@ -73,7 +73,7 @@ static void printhelp(const char * progname) {
"-g Disable password logins for root\n"
"-B Allow blank password logins\n"
#endif
"-T <1 to %d> Maximum authentication tries (default %d)\n"
"-T Maximum authentication tries (default %d)\n"
#if DROPBEAR_SVR_LOCALTCPFWD
"-j Disable local port forwarding\n"
#endif
@ -108,7 +108,7 @@ static void printhelp(const char * progname) {
#if DROPBEAR_ECDSA
ECDSA_PRIV_FILENAME,
#endif
MAX_AUTH_TRIES, DEFAULT_AUTH_TRIES,
MAX_AUTH_TRIES,
DROPBEAR_MAX_PORTS, DROPBEAR_DEFPORT, DROPBEAR_PIDFILE,
DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT);
}
@ -135,7 +135,7 @@ void svr_getopts(int argc, char ** argv) {
svr_opts.noauthpass = 0;
svr_opts.norootpass = 0;
svr_opts.allowblankpass = 0;
svr_opts.maxauthtries = DEFAULT_AUTH_TRIES;
svr_opts.maxauthtries = MAX_AUTH_TRIES;
svr_opts.inetdmode = 0;
svr_opts.portcount = 0;
svr_opts.hostkey = NULL;
@ -341,8 +341,8 @@ void svr_getopts(int argc, char ** argv) {
if (maxauthtries_arg) {
unsigned int val = 0;
if (m_str_to_uint(maxauthtries_arg, &val) == DROPBEAR_FAILURE ||
val == 0 || val > MAX_AUTH_TRIES) {
if (m_str_to_uint(maxauthtries_arg, &val) == DROPBEAR_FAILURE
|| val == 0) {
dropbear_exit("Bad maxauthtries '%s'", maxauthtries_arg);
}
svr_opts.maxauthtries = val;