/mandos/release

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/release
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
1
/*  -*- coding: utf-8 -*- */
2
/*
3
 * Passprompt - Read a password from the terminal and print it
4
 *
28 by Teddy Hogeborn
* server.conf: New file.
5
 * Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
6
 * 
7
 * This program is free software: you can redistribute it and/or
8
 * modify it under the terms of the GNU General Public License as
9
 * published by the Free Software Foundation, either version 3 of the
10
 * License, or (at your option) any later version.
11
 * 
12
 * This program is distributed in the hope that it will be useful, but
13
 * WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * General Public License for more details.
16
 * 
17
 * You should have received a copy of the GNU General Public License
18
 * along with this program.  If not, see
19
 * <http://www.gnu.org/licenses/>.
20
 * 
21
 * Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
22
 * <https://www.fukt.bsnet.se/~teddy/>.
23
 */
24
13 by Björn Påhlsson
Added following support:
25
#define _GNU_SOURCE		/* getline() */
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
26
13 by Björn Påhlsson
Added following support:
27
#include <termios.h> 		/* struct termios, tcsetattr(),
28
				   TCSAFLUSH, tcgetattr(), ECHO */
29
#include <unistd.h>		/* struct termios, tcsetattr(),
30
				   STDIN_FILENO, TCSAFLUSH,
31
				   tcgetattr(), ECHO */
32
#include <signal.h>		/* sig_atomic_t, raise(), struct
33
				   sigaction, sigemptyset(),
34
				   sigaction(), sigaddset(), SIGINT,
35
				   SIGQUIT, SIGHUP, SIGTERM */
24.1.26 by Björn Påhlsson
tally count of used symbols
36
#include <stddef.h>		/* NULL, size_t, ssize_t */
13 by Björn Påhlsson
Added following support:
37
#include <sys/types.h>		/* ssize_t */
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
38
#include <stdlib.h>		/* EXIT_SUCCESS, EXIT_FAILURE,
39
				   getopt_long */
13 by Björn Påhlsson
Added following support:
40
#include <stdio.h>		/* fprintf(), stderr, getline(),
41
				   stdin, feof(), perror(), fputc(),
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
42
				   stdout, getopt_long */
13 by Björn Påhlsson
Added following support:
43
#include <errno.h>		/* errno, EINVAL */
44
#include <iso646.h>		/* or, not */
45
#include <stdbool.h>		/* bool, false, true */
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
46
#include <string.h> 		/* strlen, rindex, strncmp, strcmp */
24.1.26 by Björn Påhlsson
tally count of used symbols
47
#include <argp.h>		/* struct argp_option, struct
48
				   argp_state, struct argp,
49
				   argp_parse(), error_t,
50
				   ARGP_KEY_ARG, ARGP_KEY_END,
51
				   ARGP_ERR_UNKNOWN */
13 by Björn Påhlsson
Added following support:
52
53
volatile bool quit_now = false;
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
54
bool debug = false;
24.1.17 by Björn Påhlsson
passprompt
55
const char *argp_program_version = "passprompt 0.9";
56
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
13 by Björn Påhlsson
Added following support:
57
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
58
static void termination_handler(__attribute__((unused))int signum){
13 by Björn Påhlsson
Added following support:
59
  quit_now = true;
60
}
61
62
int main(int argc, char **argv){
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
63
  ssize_t ret;
13 by Björn Påhlsson
Added following support:
64
  size_t n;
65
  struct termios t_new, t_old;
66
  char *buffer = NULL;
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
67
  char *prefix = NULL;
13 by Björn Påhlsson
Added following support:
68
  int status = EXIT_SUCCESS;
69
  struct sigaction old_action,
70
    new_action = { .sa_handler = termination_handler,
71
		   .sa_flags = 0 };
24.1.17 by Björn Påhlsson
passprompt
72
  {
73
    struct argp_option options[] = {
74
      { .name = "prefix", .key = 'p',
75
	.arg = "PREFIX", .flags = 0,
76
	.doc = "Prefix used before the passprompt", .group = 2 },
77
      { .name = "debug", .key = 128,
78
	.doc = "Debug mode", .group = 3 },
79
      { .name = NULL }
80
    };
81
  
82
    error_t parse_opt (int key, char *arg, struct argp_state *state) {
83
      /* Get the INPUT argument from `argp_parse', which we know is a
84
	 pointer to our plugin list pointer. */
85
      switch (key) {
86
      case 'p':
87
	prefix = arg;
88
	break;
89
      case 128:
90
	debug = true;
91
	break;
92
      case ARGP_KEY_ARG:
93
	argp_usage (state);
94
	break;
95
      case ARGP_KEY_END:
96
	break;
97
      default:
98
	return ARGP_ERR_UNKNOWN;
99
      }
100
      return 0;
101
    }
102
  
103
    struct argp argp = { .options = options, .parser = parse_opt,
104
			 .args_doc = "",
105
			 .doc = "Mandos Passprompt -- Provides a passprompt" };
24.1.26 by Björn Påhlsson
tally count of used symbols
106
    ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
107
    if (ret == ARGP_ERR_UNKNOWN){
108
      perror("argp_parse");
109
      return EXIT_FAILURE;
110
    }
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
111
  }
24.1.17 by Björn Påhlsson
passprompt
112
    
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
113
  if (debug){
114
    fprintf(stderr, "Starting %s\n", argv[0]);
115
  }
116
  if (debug){
117
    fprintf(stderr, "Storing current terminal attributes\n");
118
  }
13 by Björn Påhlsson
Added following support:
119
  
120
  if (tcgetattr(STDIN_FILENO, &t_old) != 0){
121
    return EXIT_FAILURE;
122
  }
123
  
124
  sigemptyset(&new_action.sa_mask);
125
  sigaddset(&new_action.sa_mask, SIGINT);
126
  sigaddset(&new_action.sa_mask, SIGHUP);
127
  sigaddset(&new_action.sa_mask, SIGTERM);
24.1.26 by Björn Påhlsson
tally count of used symbols
128
  ret = sigaction(SIGINT, NULL, &old_action);
129
  if(ret == -1){
130
    perror("sigaction");
131
    return EXIT_FAILURE;
132
  }
133
  if (old_action.sa_handler != SIG_IGN){
134
    ret = sigaction(SIGINT, &new_action, NULL);
135
    if(ret == -1){
136
      perror("sigaction");
137
      return EXIT_FAILURE;
138
    }
139
  }
140
  ret = sigaction(SIGHUP, NULL, &old_action);
141
  if(ret == -1){
142
    perror("sigaction");
143
    return EXIT_FAILURE;
144
  }
145
  if (old_action.sa_handler != SIG_IGN){
146
    ret = sigaction(SIGHUP, &new_action, NULL);
147
    if(ret == -1){
148
      perror("sigaction");
149
      return EXIT_FAILURE;
150
    }
151
  }
152
  ret = sigaction(SIGTERM, NULL, &old_action);
153
  if(ret == -1){
154
    perror("sigaction");
155
    return EXIT_FAILURE;
156
  }
157
  if (old_action.sa_handler != SIG_IGN){
158
    ret = sigaction(SIGTERM, &new_action, NULL);
159
    if(ret == -1){
160
      perror("sigaction");
161
      return EXIT_FAILURE;
162
    }
163
  }
164
  
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
165
  
166
  if (debug){
167
    fprintf(stderr, "Removing echo flag from terminal attributes\n");
168
  }
13 by Björn Påhlsson
Added following support:
169
  
170
  t_new = t_old;
171
  t_new.c_lflag &= ~ECHO;
172
  if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
173
    perror("tcsetattr-echo");
174
    return EXIT_FAILURE;
175
  }
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
176
177
  if (debug){
178
    fprintf(stderr, "Waiting for input from stdin \n");
179
  }
13 by Björn Påhlsson
Added following support:
180
  while(true){
181
    if (quit_now){
182
      status = EXIT_FAILURE;
183
      break;
184
    }
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
185
186
    if(prefix){
187
      fprintf(stderr, "%s Password: ", prefix);
188
    } else {
189
      fprintf(stderr, "Password: ");
190
    }      
13 by Björn Påhlsson
Added following support:
191
    ret = getline(&buffer, &n, stdin);
192
    if (ret > 0){
193
      fprintf(stdout, "%s", buffer);
194
      status = EXIT_SUCCESS;
195
      break;
196
    }
197
    if (ret < 0){
198
      if (errno != EINTR and not feof(stdin)){
199
	perror("getline");
200
	status = EXIT_FAILURE;
201
	break;
202
      }
203
    }
41 by Teddy Hogeborn
Merge.
204
    /* if(ret == 0), then the only sensible thing to do is to retry to
205
       read from stdin */
13 by Björn Påhlsson
Added following support:
206
    fputc('\n', stderr);
207
  }
41 by Teddy Hogeborn
Merge.
208
  
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
209
  if (debug){
210
    fprintf(stderr, "Restoring terminal attributes\n");
211
  }
13 by Björn Påhlsson
Added following support:
212
  if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
213
    perror("tcsetattr+echo");
214
  }
41 by Teddy Hogeborn
Merge.
215
  
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
216
  if (debug){
217
    fprintf(stderr, "%s is exiting\n", argv[0]);
218
  }
13 by Björn Påhlsson
Added following support:
219
  
220
  return status;
221
}