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57 lines
1.9 KiB
57 lines
1.9 KiB
--- a/svr-auth.c
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+++ b/svr-auth.c
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@@ -125,10 +125,11 @@ void recv_msg_userauth_request() {
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AUTH_METHOD_NONE_LEN) == 0) {
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TRACE(("recv_msg_userauth_request: 'none' request"))
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if (valid_user
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- && (svr_opts.allowblankpass || !strcmp(ses.authstate.pw_name, "root"))
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- && !svr_opts.noauthpass
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- && !(svr_opts.norootpass && ses.authstate.pw_uid == 0)
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- && ses.authstate.pw_passwd[0] == '\0')
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+ && ((svr_opts.failsafe_mode && !strcmp(ses.authstate.pw_name, "root"))
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+ || ((svr_opts.allowblankpass || !strcmp(ses.authstate.pw_name, "root"))
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+ && !svr_opts.noauthpass
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+ && !(svr_opts.norootpass && ses.authstate.pw_uid == 0)
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+ && ses.authstate.pw_passwd[0] == '\0')))
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{
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dropbear_log(LOG_NOTICE,
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"Auth succeeded with blank password for '%s' from %s",
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--- a/svr-runopts.c
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+++ b/svr-runopts.c
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@@ -77,6 +77,7 @@ static void printhelp(const char * progn
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"-s Disable password logins\n"
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"-g Disable password logins for root\n"
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"-B Allow blank password logins\n"
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+ "-f Failsafe mode: always allow password-less root login\n"
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#endif
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"-T Maximum authentication tries (default %d)\n"
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#if DROPBEAR_SVR_LOCALTCPFWD
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@@ -144,6 +145,7 @@ void svr_getopts(int argc, char ** argv)
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svr_opts.noauthpass = 0;
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svr_opts.norootpass = 0;
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svr_opts.allowblankpass = 0;
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+ svr_opts.failsafe_mode = 0;
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svr_opts.maxauthtries = MAX_AUTH_TRIES;
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svr_opts.inetdmode = 0;
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svr_opts.portcount = 0;
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@@ -266,6 +268,9 @@ void svr_getopts(int argc, char ** argv)
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case 'B':
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svr_opts.allowblankpass = 1;
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break;
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+ case 'f':
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+ svr_opts.failsafe_mode = 1;
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+ break;
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#endif
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case 'h':
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printhelp(argv[0]);
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--- a/runopts.h
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+++ b/runopts.h
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@@ -106,6 +106,8 @@ typedef struct svr_runopts {
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int allowblankpass;
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unsigned int maxauthtries;
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+ int failsafe_mode;
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+
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#if DROPBEAR_SVR_REMOTETCPFWD
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int noremotetcp;
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#endif
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