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- Committer: Teddy Hogeborn
- Date: 2009-10-26 21:16:16 UTC
- mto: (24.1.146 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20091026211616-38e9wynf4428ip2l
Merge from release branch.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugins.d/password-prompt.c
2
2
/*
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3
* Password-prompt - Read a password from the terminal and print it
4
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*
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* Copyright © 2008-2015 Teddy Hogeborn
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* Copyright © 2008-2015 Björn Påhlsson
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* Copyright © 2008,2009 Teddy Hogeborn
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* Copyright © 2008,2009 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@recompile.se>.
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* Contact the authors at <mandos@fukt.bsnet.se>.
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*/
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#define _GNU_SOURCE /* getline(), asprintf() */
25
#define _GNU_SOURCE /* getline() */
26
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27
#include <termios.h> /* struct termios, tcsetattr(),
27
#include <termios.h> /* struct termios, tcsetattr(),
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TCSAFLUSH, tcgetattr(), ECHO */
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#include <unistd.h> /* struct termios, tcsetattr(),
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STDIN_FILENO, TCSAFLUSH,
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tcgetattr(), ECHO, readlink() */
31
tcgetattr(), ECHO */
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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() */
37
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#include <stddef.h> /* NULL, size_t, ssize_t */
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#include <sys/types.h> /* ssize_t, struct dirent, pid_t,
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ssize_t, open() */
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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(), free() */
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#include <dirent.h> /* scandir(), alphasort() */
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getenv() */
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#include <stdio.h> /* fprintf(), stderr, getline(),
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stdin, feof(), fputc(), vfprintf(),
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vasprintf() */
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stdin, feof(), perror(), 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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46
*/
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#include <error.h> /* error() */
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#include <iso646.h> /* or, not */
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#include <stdbool.h> /* bool, false, true */
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#include <inttypes.h> /* strtoumax() */
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#include <sys/stat.h> /* struct stat, lstat(), open() */
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#include <string.h> /* strlen, rindex, memcmp, strerror()
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*/
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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_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 <fcntl.h> /* open() */
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#include <stdarg.h> /* va_list, va_start(), ... */
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volatile sig_atomic_t quit_now = 0;
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int signal_received;
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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@recompile.se>";
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/* Needed for conflict resolution */
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const char plymouth_name[] = "plymouthd";
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/* Function to use when printing errors */
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__attribute__((format (gnu_printf, 3, 4)))
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void error_plus(int status, int errnum, const char *formatstring,
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...){
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va_list ap;
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char *text;
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int ret;
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va_start(ap, formatstring);
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ret = vasprintf(&text, formatstring, ap);
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if(ret == -1){
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fprintf(stderr, "Mandos plugin %s: ",
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program_invocation_short_name);
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vfprintf(stderr, formatstring, ap);
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fprintf(stderr, ": %s\n", strerror(errnum));
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error(status, errno, "vasprintf while printing error");
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return;
92
}
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fprintf(stderr, "Mandos plugin ");
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error(status, errnum, "%s", text);
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free(text);
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}
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const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
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static void termination_handler(int signum){
99
65
if(quit_now){
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69
signal_received = signum;
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}
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bool conflict_detection(void){
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/* plymouth conflicts with password-prompt since both want to read
109
from the terminal. Password-prompt will exit if it detects
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plymouth since plymouth performs the same functionality.
111
*/
112
__attribute__((nonnull))
113
int is_plymouth(const struct dirent *proc_entry){
114
int ret;
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int cl_fd;
116
{
117
uintmax_t proc_id;
118
char *tmp;
119
errno = 0;
120
proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
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if(errno != 0 or *tmp != '\0'
123
or proc_id != (uintmax_t)((pid_t)proc_id)){
124
return 0;
125
}
126
}
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char *cmdline_filename;
129
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
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proc_entry->d_name);
131
if(ret == -1){
132
error_plus(0, errno, "asprintf");
133
return 0;
134
}
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/* Open /proc/<pid>/cmdline */
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cl_fd = open(cmdline_filename, O_RDONLY);
138
free(cmdline_filename);
139
if(cl_fd == -1){
140
if(errno != ENOENT){
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error_plus(0, errno, "open");
142
}
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return 0;
144
}
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char *cmdline = NULL;
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{
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size_t cmdline_len = 0;
149
size_t cmdline_allocated = 0;
150
char *tmp;
151
const size_t blocksize = 1024;
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ssize_t sret;
153
do {
154
/* Allocate more space? */
155
if(cmdline_len + blocksize + 1 > cmdline_allocated){
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tmp = realloc(cmdline, cmdline_allocated + blocksize + 1);
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if(tmp == NULL){
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error_plus(0, errno, "realloc");
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free(cmdline);
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close(cl_fd);
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return 0;
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}
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cmdline = tmp;
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cmdline_allocated += blocksize;
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}
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/* Read data */
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sret = read(cl_fd, cmdline + cmdline_len,
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cmdline_allocated - cmdline_len);
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if(sret == -1){
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error_plus(0, errno, "read");
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free(cmdline);
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close(cl_fd);
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return 0;
175
}
176
cmdline_len += (size_t)sret;
177
} while(sret != 0);
178
ret = close(cl_fd);
179
if(ret == -1){
180
error_plus(0, errno, "close");
181
free(cmdline);
182
return 0;
183
}
184
cmdline[cmdline_len] = '\0'; /* Make sure it is terminated */
185
}
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/* we now have cmdline */
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/* get basename */
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char *cmdline_base = strrchr(cmdline, '/');
190
if(cmdline_base != NULL){
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cmdline_base += 1; /* skip the slash */
192
} else {
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cmdline_base = cmdline;
194
}
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if(strcmp(cmdline_base, plymouth_name) != 0){
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if(debug){
198
fprintf(stderr, "\"%s\" is not \"%s\"\n", cmdline_base,
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plymouth_name);
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}
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free(cmdline);
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return 0;
203
}
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if(debug){
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fprintf(stderr, "\"%s\" equals \"%s\"\n", cmdline_base,
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plymouth_name);
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}
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free(cmdline);
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return 1;
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}
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struct dirent **direntries = NULL;
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int ret;
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ret = scandir("/proc", &direntries, is_plymouth, alphasort);
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if(ret == -1){
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error_plus(1, errno, "scandir");
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}
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free(direntries);
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return ret > 0;
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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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{ .name = NULL }
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};
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__attribute__((nonnull(3)))
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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 ENOMEM:
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default:
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errno = ret;
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error_plus(0, errno, "argp_parse");
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perror("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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if(debug){
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fprintf(stderr, "Starting %s\n", argv[0]);
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}
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if(conflict_detection()){
307
if(debug){
308
fprintf(stderr, "Stopping %s because of conflict\n", argv[0]);
309
}
310
return EXIT_FAILURE;
311
}
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313
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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;
319
error_plus(0, errno, "tcgetattr");
158
perror("tcgetattr");
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159
switch(e){
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case EBADF:
322
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case ENOTTY:
329
168
sigemptyset(&new_action.sa_mask);
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ret = sigaddset(&new_action.sa_mask, SIGINT);
331
170
if(ret == -1){
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error_plus(0, errno, "sigaddset");
171
perror("sigaddset");
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return EX_OSERR;
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}
335
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ret = sigaddset(&new_action.sa_mask, SIGHUP);
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if(ret == -1){
337
error_plus(0, errno, "sigaddset");
176
perror("sigaddset");
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return EX_OSERR;
339
178
}
340
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ret = sigaddset(&new_action.sa_mask, SIGTERM);
341
180
if(ret == -1){
342
error_plus(0, errno, "sigaddset");
181
perror("sigaddset");
343
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return EX_OSERR;
344
183
}
345
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/* Need to check if the handler is SIG_IGN before handling:
348
187
*/
349
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ret = sigaction(SIGINT, NULL, &old_action);
350
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if(ret == -1){
351
error_plus(0, errno, "sigaction");
190
perror("sigaction");
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return EX_OSERR;
353
192
}
354
193
if(old_action.sa_handler != SIG_IGN){
355
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ret = sigaction(SIGINT, &new_action, NULL);
356
195
if(ret == -1){
357
error_plus(0, errno, "sigaction");
196
perror("sigaction");
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return EX_OSERR;
359
198
}
360
199
}
361
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ret = sigaction(SIGHUP, NULL, &old_action);
362
201
if(ret == -1){
363
error_plus(0, errno, "sigaction");
202
perror("sigaction");
364
203
return EX_OSERR;
365
204
}
366
205
if(old_action.sa_handler != SIG_IGN){
367
206
ret = sigaction(SIGHUP, &new_action, NULL);
368
207
if(ret == -1){
369
error_plus(0, errno, "sigaction");
208
perror("sigaction");
370
209
return EX_OSERR;
371
210
}
372
211
}
373
212
ret = sigaction(SIGTERM, NULL, &old_action);
374
213
if(ret == -1){
375
error_plus(0, errno, "sigaction");
214
perror("sigaction");
376
215
return EX_OSERR;
377
216
}
378
217
if(old_action.sa_handler != SIG_IGN){
379
218
ret = sigaction(SIGTERM, &new_action, NULL);
380
219
if(ret == -1){
381
error_plus(0, errno, "sigaction");
220
perror("sigaction");
382
221
return EX_OSERR;
383
222
}
384
223
}
392
231
t_new.c_lflag &= ~(tcflag_t)ECHO;
393
232
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
394
233
int e = errno;
395
error_plus(0, errno, "tcsetattr-echo");
234
perror("tcsetattr-echo");
396
235
switch(e){
397
236
case EBADF:
398
237
case ENOTTY:
419
258
fprintf(stderr, "%s ", prefix);
420
259
}
421
260
{
422
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
423
const char *crypttarget = getenv("CRYPTTAB_NAME");
424
/* Before cryptsetup 1.1.0~rc2 */
425
if(cryptsource == NULL){
426
cryptsource = getenv("cryptsource");
427
}
428
if(crypttarget == NULL){
429
crypttarget = getenv("crypttarget");
430
}
431
const char *const prompt1 = "Unlocking the disk";
432
const char *const prompt2 = "Enter passphrase";
261
const char *cryptsource = getenv("cryptsource");
262
const char *crypttarget = getenv("crypttarget");
263
const char *const prompt
264
= "Enter passphrase to unlock the disk";
433
265
if(cryptsource == NULL){
434
266
if(crypttarget == NULL){
435
fprintf(stderr, "%s to unlock the disk: ", prompt2);
267
fprintf(stderr, "%s: ", prompt);
436
268
} else {
437
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
438
prompt2);
269
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
439
270
}
440
271
} else {
441
272
if(crypttarget == NULL){
442
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
443
prompt2);
273
fprintf(stderr, "%s %s: ", prompt, cryptsource);
444
274
} else {
445
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
446
crypttarget, prompt2);
275
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
276
crypttarget);
447
277
}
448
278
}
449
279
}
450
sret = getline(&buffer, &n, stdin);
451
if(sret > 0){
280
ret = getline(&buffer, &n, stdin);
281
if(ret > 0){
452
282
status = EXIT_SUCCESS;
453
283
/* Make n = data size instead of allocated buffer size */
454
n = (size_t)sret;
284
n = (size_t)ret;
455
285
/* Strip final newline */
456
286
if(n > 0 and buffer[n-1] == '\n'){
457
287
buffer[n-1] = '\0'; /* not strictly necessary */
459
289
}
460
290
size_t written = 0;
461
291
while(written < n){
462
sret = write(STDOUT_FILENO, buffer + written, n - written);
463
if(sret < 0){
292
ret = write(STDOUT_FILENO, buffer + written, n - written);
293
if(ret < 0){
464
294
int e = errno;
465
error_plus(0, errno, "write");
295
perror("write");
466
296
switch(e){
467
297
case EBADF:
468
298
case EFAULT:
479
309
}
480
310
break;
481
311
}
482
written += (size_t)sret;
312
written += (size_t)ret;
483
313
}
484
sret = close(STDOUT_FILENO);
485
if(sret == -1){
314
ret = close(STDOUT_FILENO);
315
if(ret == -1){
486
316
int e = errno;
487
error_plus(0, errno, "close");
317
perror("close");
488
318
switch(e){
489
319
case EBADF:
490
320
status = EX_OSFILE;
497
327
}
498
328
break;
499
329
}
500
if(sret < 0){
330
if(ret < 0){
501
331
int e = errno;
502
332
if(errno != EINTR and not feof(stdin)){
503
error_plus(0, errno, "getline");
333
perror("getline");
504
334
switch(e){
505
335
case EBADF:
506
336
status = EX_UNAVAILABLE;
507
break;
508
337
case EIO:
509
338
case EINVAL:
510
339
default:
514
343
break;
515
344
}
516
345
}
517
/* if(sret == 0), then the only sensible thing to do is to retry
518
to read from stdin */
346
/* if(ret == 0), then the only sensible thing to do is to retry to
347
read from stdin */
519
348
fputc('\n', stderr);
520
349
if(debug and not quit_now){
521
350
/* If quit_now is nonzero, we were interrupted by a signal, and
530
359
fprintf(stderr, "Restoring terminal attributes\n");
531
360
}
532
361
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
533
error_plus(0, errno, "tcsetattr+echo");
362
perror("tcsetattr+echo");
534
363
}
535
364
536
365
if(quit_now){
538
367
old_action.sa_handler = SIG_DFL;
539
368
ret = sigaction(signal_received, &old_action, NULL);
540
369
if(ret == -1){
541
error_plus(0, errno, "sigaction");
370
perror("sigaction");
542
371
}
543
372
raise(signal_received);
544
373
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0