shithub: tlsclient

ref: dce45f38c8308048d849ede9128a8656e6b2889d
dir: /bsd.c/

#include <sys/types.h>
#include <sys/resource.h>

#include <errno.h>
#include <pwd.h>
#include <readpassphrase.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <util.h>
#include <login_cap.h>

#undef login

#include <u.h>
#include <args.h>
#include <libc.h>
#include <auth.h>
#include <authsrv.h>
#include <libsec.h>

#include "fncs.h"

char *authserver;

int
main(int argc, char *argv[])
{
	FILE *back = NULL;
	char *class = NULL, *username = NULL, *wheel = NULL;
	char response[1024], pbuf[1024], *pass = "";
	int ch, mode = 0, lastchance = 0, fd = -1;
	AuthInfo *ai;

	(void)signal(SIGQUIT, SIG_IGN);
	(void)signal(SIGINT, SIG_IGN);
	(void)setpriority(PRIO_PROCESS, 0, 0);

	openlog(NULL, LOG_ODELAY, LOG_AUTH);

	while ((ch = getopt(argc, argv, "ds:v:")) != -1) {
		switch (ch) {
		case 'd':
			back = stdout;
			break;
		case 's':	/* service */
			if (strcmp(optarg, "login") == 0)
				mode = 0;
			else if (strcmp(optarg, "challenge") == 0)
				mode = 1;
			else if (strcmp(optarg, "response") == 0)
				mode = 2;
			else {
				syslog(LOG_ERR, "%s: invalid service", optarg);
				exit(1);
			}
			break;
		case 'v':
			if (strncmp(optarg, "wheel=", 6) == 0)
				wheel = optarg + 6;
			else if (strncmp(optarg, "lastchance=", 11) == 0)
				lastchance = (strcmp(optarg + 11, "yes") == 0);
			else if (strncmp(optarg, "authserver=", 11) == 0)
				authserver = optarg + 11;
			break;
		default:
			syslog(LOG_ERR, "usage error");
			exit(1);
		}
	}

	switch (argc - optind) {
	case 2:
		class = argv[optind + 1];
		/* FALLTHROUGH */
	case 1:
		username = argv[optind];
		break;
	default:
		syslog(LOG_ERR, "usage error");
		exit(1);
	}

	if (back == NULL && (back = fdopen(3, "r+")) == NULL) {
		syslog(LOG_ERR, "reopening back channel: %m");
		exit(1);
	}
	if (wheel != NULL && strcmp(wheel, "yes") != 0) {
		fprintf(back, BI_VALUE " errormsg %s\n",
		    "you are not in group wheel");
		fprintf(back, BI_REJECT "\n");
		exit(1);
	}

	if (mode == 1) {
		fprintf(back, BI_SILENT "\n");
		exit(0);
	}

	(void)setpriority(PRIO_PROCESS, 0, -4);

	if (mode == 2) {
		mode = 0;
		ch = -1;
		while (++ch < sizeof(response) &&
		    read(3, &response[ch], 1) == 1) {
			if (response[ch] == '\0' && ++mode == 2)
				break;
			if (response[ch] == '\0' && mode == 1)
				pass = response + ch + 1;
		}
		if (mode < 2) {
			syslog(LOG_ERR, "protocol error on back channel");
			exit(1);
		}
	} else {
		pass = readpassphrase("Password:", pbuf, sizeof(pbuf),
		    RPP_ECHO_OFF);
	}

	if (pass == NULL){
		fprintf(back, BI_REJECT "\n");
		exit(1);
	}

	fd = unix_dial(authserver, "17019");
	if(fd < 0){
		fprintf(back, BI_REJECT "\n");
		exit(1);
	}

	ai = p9any(username, pass, fd);
	if(ai == nil){
		fprintf(back, BI_REJECT "\n");
		exit(1);
	}

	fprintf(back, BI_AUTH "\n");
	exit(0);
}