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- Committer: Björn Påhlsson
- Date: 2008-08-08 01:25:27 UTC
- mfrom: (49 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 50.
- Revision ID: belorn@braxen-20080808012527-s03r8xd2b20ncon0
merge
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugins.d/mandos-client.c => plugins.d/password-request.c
- files modified:
- Makefile
added
removed
plugins.d/password-prompt.c
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/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
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/* -*- coding: utf-8 -*- */
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/*
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* Password-prompt - Read a password from the terminal and print it
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*
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* Copyright © 2008,2009 Teddy Hogeborn
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* Copyright © 2008,2009 Björn Påhlsson
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* Passprompt - Read a password from the terminal and print it
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*
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* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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*
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* This program is free software: you can redistribute it and/or
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* 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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*/
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#define _GNU_SOURCE /* getline() */
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#include <signal.h> /* sig_atomic_t, raise(), struct
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sigaction, sigemptyset(),
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sigaction(), sigaddset(), SIGINT,
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SIGQUIT, SIGHUP, SIGTERM,
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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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getopt_long, getenv() */
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getopt_long */
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#include <stdio.h> /* fprintf(), stderr, getline(),
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stdin, feof(), perror(), fputc(),
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getopt_long */
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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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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, strncmp, strcmp */
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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 <argp.h> /* struct argp_option,
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struct argp_state, struct argp,
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argp_parse() */
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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_version = "passprompt 0.9";
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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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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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.doc = "Prefix used before the passprompt", .group = 2 },
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{ .name = "debug", .key = 128,
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.doc = "Debug mode", .group = 3 },
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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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switch (key){
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error_t parse_opt (int key, char *arg, struct argp_state *state) {
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/* Get the INPUT argument from `argp_parse', which we know is a
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pointer to our plugin list pointer. */
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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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debug = true;
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break;
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case ARGP_KEY_ARG:
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argp_usage(state);
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argp_usage (state);
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break;
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case ARGP_KEY_END:
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break;
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}
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return 0;
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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, 0, 0, NULL);
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if(ret == ARGP_ERR_UNKNOWN){
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fprintf(stderr, "Unknown error while parsing arguments\n");
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return EX_SOFTWARE;
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}
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.doc = "Mandos Passprompt -- Provides a passprompt" };
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argp_parse (&argp, argc, argv, 0, 0, NULL);
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}
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if(debug){
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if (debug){
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fprintf(stderr, "Starting %s\n", argv[0]);
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}
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if(debug){
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if (debug){
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fprintf(stderr, "Storing current terminal attributes\n");
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}
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if(tcgetattr(STDIN_FILENO, &t_old) != 0){
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int e = errno;
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perror("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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perror("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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perror("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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perror("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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perror("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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perror("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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perror("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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perror("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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perror("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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perror("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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t_new.c_lflag &= ~ECHO;
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
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perror("tcsetattr-echo");
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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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case EINVAL:
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default:
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return EX_OSERR;
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}
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return EXIT_FAILURE;
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}
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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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}
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while(true){
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if(quit_now){
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if(debug){
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fprintf(stderr, "Interrupted by signal, exiting.\n");
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}
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if (quit_now){
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status = EXIT_FAILURE;
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break;
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}
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if(prefix){
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fprintf(stderr, "%s ", prefix);
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}
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{
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const char *cryptsource = getenv("cryptsource");
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const char *crypttarget = getenv("crypttarget");
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const char *const prompt
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= "Enter passphrase to unlock the disk";
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if(cryptsource == NULL){
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if(crypttarget == NULL){
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fprintf(stderr, "%s: ", prompt);
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} else {
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fprintf(stderr, "%s (%s): ", prompt, crypttarget);
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}
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} else {
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if(crypttarget == NULL){
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fprintf(stderr, "%s %s: ", prompt, cryptsource);
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} else {
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fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
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crypttarget);
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}
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}
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}
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fprintf(stderr, "%s Password: ", prefix);
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} else {
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fprintf(stderr, "Password: ");
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}
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ret = getline(&buffer, &n, stdin);
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if(ret > 0){
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if (ret > 0){
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fprintf(stdout, "%s", buffer);
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status = EXIT_SUCCESS;
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/* Make n = data size instead of allocated buffer size */
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n = (size_t)ret;
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/* Strip final newline */
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if(n > 0 and buffer[n-1] == '\n'){
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buffer[n-1] = '\0'; /* not strictly necessary */
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n--;
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}
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size_t written = 0;
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while(written < n){
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ret = write(STDOUT_FILENO, buffer + written, n - written);
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if(ret < 0){
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int e = errno;
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perror("write");
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switch(e){
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case EBADF:
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case EFAULT:
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case EINVAL:
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case EFBIG:
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case EIO:
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case ENOSPC:
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default:
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status = EX_IOERR;
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break;
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case EINTR:
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status = EXIT_FAILURE;
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break;
282
}
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break;
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}
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written += (size_t)ret;
286
}
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ret = close(STDOUT_FILENO);
288
if(ret == -1){
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int e = errno;
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perror("close");
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switch(e){
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case EBADF:
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status = EX_OSFILE;
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break;
295
case EIO:
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default:
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status = EX_IOERR;
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break;
299
}
300
}
301
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break;
302
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}
303
if(ret < 0){
304
int e = errno;
305
if(errno != EINTR and not feof(stdin)){
164
if (ret < 0){
165
if (errno != EINTR and not feof(stdin)){
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166
perror("getline");
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switch(e){
308
case EBADF:
309
status = EX_UNAVAILABLE;
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case EIO:
311
case EINVAL:
312
default:
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status = EX_IOERR;
314
break;
315
}
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status = EXIT_FAILURE;
316
168
break;
317
169
}
318
170
}
319
171
/* if(ret == 0), then the only sensible thing to do is to retry to
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read from stdin */
321
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fputc('\n', stderr);
322
if(debug and not quit_now){
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/* If quit_now is nonzero, we were interrupted by a signal, and
324
will print that later, so no need to show this too. */
325
fprintf(stderr, "getline() returned 0, retrying.\n");
326
}
327
174
}
328
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free(buffer);
330
331
if(debug){
176
if (debug){
332
177
fprintf(stderr, "Restoring terminal attributes\n");
333
178
}
334
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
179
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
335
180
perror("tcsetattr+echo");
336
181
}
337
182
338
if(quit_now){
339
sigemptyset(&old_action.sa_mask);
340
old_action.sa_handler = SIG_DFL;
341
ret = sigaction(signal_received, &old_action, NULL);
342
if(ret == -1){
343
perror("sigaction");
344
}
345
raise(signal_received);
346
}
347
348
if(debug){
349
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
350
status);
351
}
352
if(status == EXIT_SUCCESS or status == EX_OK){
353
fputc('\n', stderr);
183
if (debug){
184
fprintf(stderr, "%s is exiting\n", argv[0]);
354
185
}
355
186
356
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return status;
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