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- Committer: Björn Påhlsson
- Date: 2008-08-03 20:35:01 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 41.
- Revision ID: belorn@braxen-20080803203501-av7janz21ve7iq0b
mandosclient
Droping privileges
split gnutls function into global and session
* server.py (if_nametoindex): Redefine itself instead of using a
default keyword argument.
Droping privileges
split gnutls function into global and session
* server.py (if_nametoindex): Redefine itself instead of using a
default keyword argument.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/passprompt.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Password-prompt - Read a password from the terminal and print it
4
*
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* Copyright © 2008-2010 Teddy Hogeborn
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* Copyright © 2008-2010 Björn Påhlsson
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* Passprompt - Read a password from the terminal and print it
4
*
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* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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*
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7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
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* along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Contact the authors at <mandos@fukt.bsnet.se>.
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* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
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* <https://www.fukt.bsnet.se/~teddy/>.
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23
*/
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#define _GNU_SOURCE /* getline() */
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#include <signal.h> /* sig_atomic_t, raise(), struct
33
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sigaction, sigemptyset(),
34
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sigaction(), sigaddset(), SIGINT,
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SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
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#include <stddef.h> /* NULL, size_t, ssize_t */
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SIGQUIT, SIGHUP, SIGTERM */
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#include <stddef.h> /* NULL, size_t */
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#include <sys/types.h> /* ssize_t */
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#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
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getenv() */
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getopt_long */
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#include <stdio.h> /* fprintf(), stderr, getline(),
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stdin, feof(), fputc()
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*/
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#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
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EFAULT, EFBIG, EIO, ENOSPC, EINTR
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*/
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#include <error.h> /* error() */
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stdin, feof(), perror(), fputc(),
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stdout, getopt_long */
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#include <errno.h> /* errno, EINVAL */
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#include <iso646.h> /* or, not */
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#include <stdbool.h> /* bool, false, true */
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#include <string.h> /* strlen, rindex */
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#include <argp.h> /* struct argp_option, struct
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argp_state, struct argp,
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argp_parse(), error_t,
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ARGP_KEY_ARG, ARGP_KEY_END,
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ARGP_ERR_UNKNOWN */
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#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
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EX_UNAVAILABLE, EX_IOERR, EX_OK */
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#include <string.h> /* strlen, rindex, strncmp, strcmp */
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#include <getopt.h> /* getopt_long */
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volatile sig_atomic_t quit_now = 0;
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int signal_received;
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volatile bool quit_now = false;
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bool debug = false;
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const char *argp_program_version = "password-prompt " VERSION;
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const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
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static void termination_handler(int signum){
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if(quit_now){
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return;
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}
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quit_now = 1;
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signal_received = signum;
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static void termination_handler(__attribute__((unused))int signum){
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quit_now = true;
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}
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int main(int argc, char **argv){
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ssize_t sret;
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int ret;
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ssize_t ret;
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size_t n;
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struct termios t_new, t_old;
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char *buffer = NULL;
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struct sigaction old_action,
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new_action = { .sa_handler = termination_handler,
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65
.sa_flags = 0 };
84
{
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struct argp_option options[] = {
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{ .name = "prefix", .key = 'p',
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.arg = "PREFIX", .flags = 0,
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.doc = "Prefix shown before the prompt", .group = 2 },
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{ .name = "debug", .key = 128,
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.doc = "Debug mode", .group = 3 },
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/*
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* These reproduce what we would get without ARGP_NO_HELP
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*/
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{ .name = "help", .key = '?',
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.doc = "Give this help list", .group = -1 },
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{ .name = "usage", .key = -3,
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.doc = "Give a short usage message", .group = -1 },
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{ .name = "version", .key = 'V',
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.doc = "Print program version", .group = -1 },
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{ .name = NULL }
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};
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error_t parse_opt (int key, char *arg, struct argp_state *state){
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errno = 0;
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switch (key){
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case 'p':
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prefix = arg;
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break;
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case 128:
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debug = true;
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break;
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/*
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* These reproduce what we would get without ARGP_NO_HELP
114
*/
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case '?': /* --help */
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argp_state_help(state, state->out_stream,
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(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
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& ~(unsigned int)ARGP_HELP_EXIT_OK);
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case -3: /* --usage */
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argp_state_help(state, state->out_stream,
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ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
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case 'V': /* --version */
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fprintf(state->out_stream, "%s\n", argp_program_version);
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exit(argp_err_exit_status);
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break;
126
default:
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return ARGP_ERR_UNKNOWN;
128
}
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return errno;
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while (true){
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static struct option long_options[] = {
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{"debug", no_argument, (int *)&debug, 1},
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{"prefix", required_argument, 0, 'p'},
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{0, 0, 0, 0} };
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int option_index = 0;
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ret = getopt_long (argc, argv, "p:", long_options, &option_index);
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if (ret == -1){
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break;
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}
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struct argp argp = { .options = options, .parser = parse_opt,
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.args_doc = "",
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.doc = "Mandos password-prompt -- Read and"
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" output a password" };
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ret = argp_parse(&argp, argc, argv,
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ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
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switch(ret){
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case 0:
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break;
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case ENOMEM:
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case 'p':
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prefix = optarg;
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break;
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default:
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errno = ret;
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error(0, errno, "argp_parse");
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return EX_OSERR;
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case EINVAL:
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return EX_USAGE;
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fprintf(stderr, "bad arguments\n");
88
exit(EXIT_FAILURE);
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89
}
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90
}
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if(debug){
91
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if (debug){
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fprintf(stderr, "Starting %s\n", argv[0]);
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94
}
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if(debug){
95
if (debug){
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fprintf(stderr, "Storing current terminal attributes\n");
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97
}
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if(tcgetattr(STDIN_FILENO, &t_old) != 0){
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int e = errno;
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error(0, errno, "tcgetattr");
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switch(e){
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case EBADF:
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case ENOTTY:
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return EX_UNAVAILABLE;
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default:
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return EX_OSERR;
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}
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if (tcgetattr(STDIN_FILENO, &t_old) != 0){
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return EXIT_FAILURE;
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}
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sigemptyset(&new_action.sa_mask);
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ret = sigaddset(&new_action.sa_mask, SIGINT);
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if(ret == -1){
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error(0, errno, "sigaddset");
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return EX_OSERR;
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}
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ret = sigaddset(&new_action.sa_mask, SIGHUP);
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if(ret == -1){
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error(0, errno, "sigaddset");
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return EX_OSERR;
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}
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ret = sigaddset(&new_action.sa_mask, SIGTERM);
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if(ret == -1){
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error(0, errno, "sigaddset");
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return EX_OSERR;
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}
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/* Need to check if the handler is SIG_IGN before handling:
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| [[info:libc:Initial Signal Actions]] |
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| [[info:libc:Basic Signal Handling]] |
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*/
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ret = sigaction(SIGINT, NULL, &old_action);
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if(ret == -1){
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error(0, errno, "sigaction");
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return EX_OSERR;
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}
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if(old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGINT, &new_action, NULL);
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if(ret == -1){
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error(0, errno, "sigaction");
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return EX_OSERR;
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}
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}
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ret = sigaction(SIGHUP, NULL, &old_action);
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if(ret == -1){
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error(0, errno, "sigaction");
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return EX_OSERR;
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}
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if(old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGHUP, &new_action, NULL);
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if(ret == -1){
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error(0, errno, "sigaction");
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return EX_OSERR;
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}
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}
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ret = sigaction(SIGTERM, NULL, &old_action);
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if(ret == -1){
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error(0, errno, "sigaction");
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return EX_OSERR;
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}
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if(old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGTERM, &new_action, NULL);
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if(ret == -1){
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error(0, errno, "sigaction");
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return EX_OSERR;
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}
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}
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if(debug){
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sigaddset(&new_action.sa_mask, SIGINT);
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sigaddset(&new_action.sa_mask, SIGHUP);
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sigaddset(&new_action.sa_mask, SIGTERM);
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sigaction(SIGINT, NULL, &old_action);
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if (old_action.sa_handler != SIG_IGN)
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sigaction(SIGINT, &new_action, NULL);
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sigaction(SIGHUP, NULL, &old_action);
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if (old_action.sa_handler != SIG_IGN)
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sigaction(SIGHUP, &new_action, NULL);
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sigaction(SIGTERM, NULL, &old_action);
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if (old_action.sa_handler != SIG_IGN)
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sigaction(SIGTERM, &new_action, NULL);
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if (debug){
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fprintf(stderr, "Removing echo flag from terminal attributes\n");
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}
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t_new = t_old;
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t_new.c_lflag &= ~(tcflag_t)ECHO;
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if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
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int e = errno;
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error(0, errno, "tcsetattr-echo");
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switch(e){
238
case EBADF:
239
case ENOTTY:
240
return EX_UNAVAILABLE;
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case EINVAL:
242
default:
243
return EX_OSERR;
244
}
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t_new.c_lflag &= ~ECHO;
124
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
125
perror("tcsetattr-echo");
126
return EXIT_FAILURE;
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127
}
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if(debug){
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if (debug){
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fprintf(stderr, "Waiting for input from stdin \n");
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131
}
250
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while(true){
251
if(quit_now){
252
if(debug){
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fprintf(stderr, "Interrupted by signal, exiting.\n");
254
}
133
if (quit_now){
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status = EXIT_FAILURE;
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break;
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136
}
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if(prefix){
260
fprintf(stderr, "%s ", prefix);
261
}
262
{
263
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
264
const char *crypttarget = getenv("CRYPTTAB_NAME");
265
/* Before cryptsetup 1.1.0~rc2 */
266
if(cryptsource == NULL){
267
cryptsource = getenv("cryptsource");
268
}
269
if(crypttarget == NULL){
270
crypttarget = getenv("crypttarget");
271
}
272
const char *const prompt1 = "Unlocking the disk";
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const char *const prompt2 = "Enter passphrase";
274
if(cryptsource == NULL){
275
if(crypttarget == NULL){
276
fprintf(stderr, "%s to unlock the disk: ", prompt2);
277
} else {
278
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
279
prompt2);
280
}
281
} else {
282
if(crypttarget == NULL){
283
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
284
prompt2);
285
} else {
286
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
287
crypttarget, prompt2);
288
}
289
}
290
}
291
sret = getline(&buffer, &n, stdin);
292
if(sret > 0){
139
fprintf(stderr, "%s Password: ", prefix);
140
} else {
141
fprintf(stderr, "Password: ");
142
}
143
ret = getline(&buffer, &n, stdin);
144
if (ret > 0){
145
fprintf(stdout, "%s", buffer);
293
146
status = EXIT_SUCCESS;
294
/* Make n = data size instead of allocated buffer size */
295
n = (size_t)sret;
296
/* Strip final newline */
297
if(n > 0 and buffer[n-1] == '\n'){
298
buffer[n-1] = '\0'; /* not strictly necessary */
299
n--;
300
}
301
size_t written = 0;
302
while(written < n){
303
sret = write(STDOUT_FILENO, buffer + written, n - written);
304
if(sret < 0){
305
int e = errno;
306
error(0, errno, "write");
307
switch(e){
308
case EBADF:
309
case EFAULT:
310
case EINVAL:
311
case EFBIG:
312
case EIO:
313
case ENOSPC:
314
default:
315
status = EX_IOERR;
316
break;
317
case EINTR:
318
status = EXIT_FAILURE;
319
break;
320
}
321
break;
322
}
323
written += (size_t)sret;
324
}
325
sret = close(STDOUT_FILENO);
326
if(sret == -1){
327
int e = errno;
328
error(0, errno, "close");
329
switch(e){
330
case EBADF:
331
status = EX_OSFILE;
332
break;
333
case EIO:
334
default:
335
status = EX_IOERR;
336
break;
337
}
338
}
339
147
break;
340
148
}
341
if(sret < 0){
342
int e = errno;
343
if(errno != EINTR and not feof(stdin)){
344
error(0, errno, "getline");
345
switch(e){
346
case EBADF:
347
status = EX_UNAVAILABLE;
348
case EIO:
349
case EINVAL:
350
default:
351
status = EX_IOERR;
352
break;
353
}
149
// ret == 0 makes no other sence than to retry to read from stdin
150
if (ret < 0){
151
if (errno != EINTR and not feof(stdin)){
152
perror("getline");
153
status = EXIT_FAILURE;
354
154
break;
355
155
}
356
156
}
357
/* if(sret == 0), then the only sensible thing to do is to retry to
358
read from stdin */
359
157
fputc('\n', stderr);
360
if(debug and not quit_now){
361
/* If quit_now is nonzero, we were interrupted by a signal, and
362
will print that later, so no need to show this too. */
363
fprintf(stderr, "getline() returned 0, retrying.\n");
364
}
365
158
}
366
367
free(buffer);
368
369
if(debug){
159
160
if (debug){
370
161
fprintf(stderr, "Restoring terminal attributes\n");
371
162
}
372
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
373
error(0, errno, "tcsetattr+echo");
374
}
375
376
if(quit_now){
377
sigemptyset(&old_action.sa_mask);
378
old_action.sa_handler = SIG_DFL;
379
ret = sigaction(signal_received, &old_action, NULL);
380
if(ret == -1){
381
error(0, errno, "sigaction");
382
}
383
raise(signal_received);
384
}
385
386
if(debug){
387
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
388
status);
389
}
390
if(status == EXIT_SUCCESS or status == EX_OK){
391
fputc('\n', stderr);
163
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
164
perror("tcsetattr+echo");
165
}
166
167
if (debug){
168
fprintf(stderr, "%s is exiting\n", argv[0]);
392
169
}
393
170
394
171
return status;
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