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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <getopt.h>
#include <stddef.h>
#include <unistd.h>
#include "ask-password-api.h"
#include "def.h"
#include "log.h"
#include "macro.h"
#include "main-func.h"
#include "parse-argument.h"
#include "pretty-print.h"
#include "strv.h"
#include "terminal-util.h"
static const char *arg_icon = NULL;
static const char *arg_id = NULL; /* identifier for 'ask-password' protocol */
static const char *arg_key_name = NULL; /* name in kernel keyring */
static const char *arg_credential_name = NULL; /* name in $CREDENTIALS_DIRECTORY directory */
static char *arg_message = NULL;
static usec_t arg_timeout = DEFAULT_TIMEOUT_USEC;
static bool arg_multiple = false;
static bool arg_no_output = false;
static AskPasswordFlags arg_flags = ASK_PASSWORD_PUSH_CACHE;
static bool arg_newline = true;
STATIC_DESTRUCTOR_REGISTER(arg_message, freep);
static int help(void) {
_cleanup_free_ char *link = NULL;
int r;
r = terminal_urlify_man("systemd-ask-password", "1", &link);
if (r < 0)
return log_oom();
printf("%1$s [OPTIONS...] MESSAGE\n\n"
"%3$sQuery the user for a system passphrase, via the TTY or an UI agent.%4$s\n\n"
" -h --help Show this help\n"
" --icon=NAME Icon name\n"
" --id=ID Query identifier (e.g. \"cryptsetup:/dev/sda5\")\n"
" --keyname=NAME Kernel key name for caching passwords (e.g. \"cryptsetup\")\n"
" --credential=NAME\n"
" Credential name for LoadCredential=/SetCredential=\n"
" credentials\n"
" --timeout=SEC Timeout in seconds\n"
" --echo=yes|no|masked\n"
" Control whether to show password while typing (echo)\n"
" -e --echo Equivalent to --echo=yes\n"
" --emoji=yes|no|auto\n"
" Show a lock and key emoji\n"
" --no-tty Ask question via agent even on TTY\n"
" --accept-cached Accept cached passwords\n"
" --multiple List multiple passwords if available\n"
" --no-output Do not print password to standard output\n"
" -n Do not suffix password written to standard output with\n"
" newline\n"
"\nSee the %2$s for details.\n",
program_invocation_short_name,
link,
ansi_highlight(),
ansi_normal());
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_ICON = 0x100,
ARG_TIMEOUT,
ARG_EMOJI,
ARG_NO_TTY,
ARG_ACCEPT_CACHED,
ARG_MULTIPLE,
ARG_ID,
ARG_KEYNAME,
ARG_NO_OUTPUT,
ARG_VERSION,
ARG_CREDENTIAL,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "icon", required_argument, NULL, ARG_ICON },
{ "timeout", required_argument, NULL, ARG_TIMEOUT },
{ "echo", optional_argument, NULL, 'e' },
{ "emoji", required_argument, NULL, ARG_EMOJI },
{ "no-tty", no_argument, NULL, ARG_NO_TTY },
{ "accept-cached", no_argument, NULL, ARG_ACCEPT_CACHED },
{ "multiple", no_argument, NULL, ARG_MULTIPLE },
{ "id", required_argument, NULL, ARG_ID },
{ "keyname", required_argument, NULL, ARG_KEYNAME },
{ "no-output", no_argument, NULL, ARG_NO_OUTPUT },
{ "credential", required_argument, NULL, ARG_CREDENTIAL },
{}
};
const char *emoji = NULL;
int c, r;
assert(argc >= 0);
assert(argv);
/* Note the asymmetry: the long option --echo= allows an optional argument, the short option does
* not. */
/* Resetting to 0 forces the invocation of an internal initialization routine of getopt_long()
* that checks for GNU extensions in optstring ('-' or '+' at the beginning). */
optind = 0;
while ((c = getopt_long(argc, argv, "+hen", options, NULL)) >= 0)
switch (c) {
case 'h':
return help();
case ARG_VERSION:
return version();
case ARG_ICON:
arg_icon = optarg;
break;
case ARG_TIMEOUT:
r = parse_sec(optarg, &arg_timeout);
if (r < 0)
return log_error_errno(r, "Failed to parse --timeout= parameter: %s", optarg);
break;
case 'e':
if (!optarg) {
/* Short option -e is used, or no argument to long option --echo= */
arg_flags |= ASK_PASSWORD_ECHO;
arg_flags &= ~ASK_PASSWORD_SILENT;
} else if (isempty(optarg) || streq(optarg, "masked"))
/* Empty argument or explicit string "masked" for default behaviour. */
arg_flags &= ~(ASK_PASSWORD_ECHO|ASK_PASSWORD_SILENT);
else {
bool b;
r = parse_boolean_argument("--echo=", optarg, &b);
if (r < 0)
return r;
SET_FLAG(arg_flags, ASK_PASSWORD_ECHO, b);
SET_FLAG(arg_flags, ASK_PASSWORD_SILENT, !b);
}
break;
case ARG_EMOJI:
emoji = optarg;
break;
case ARG_NO_TTY:
arg_flags |= ASK_PASSWORD_NO_TTY;
break;
case ARG_ACCEPT_CACHED:
arg_flags |= ASK_PASSWORD_ACCEPT_CACHED;
break;
case ARG_MULTIPLE:
arg_multiple = true;
break;
case ARG_ID:
arg_id = optarg;
break;
case ARG_KEYNAME:
arg_key_name = optarg;
break;
case ARG_NO_OUTPUT:
arg_no_output = true;
break;
case ARG_CREDENTIAL:
arg_credential_name = optarg;
break;
case 'n':
arg_newline = false;
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
if (isempty(emoji) || streq(emoji, "auto"))
SET_FLAG(arg_flags, ASK_PASSWORD_HIDE_EMOJI, FLAGS_SET(arg_flags, ASK_PASSWORD_ECHO));
else {
bool b;
r = parse_boolean_argument("--emoji=", emoji, &b);
if (r < 0)
return r;
SET_FLAG(arg_flags, ASK_PASSWORD_HIDE_EMOJI, !b);
}
if (argc > optind) {
arg_message = strv_join(argv + optind, " ");
if (!arg_message)
return log_oom();
} else if (FLAGS_SET(arg_flags, ASK_PASSWORD_ECHO)) {
/* By default ask_password_auto() will query with the string "Password: ", which is not right
* when full echo is on, since then it's unlikely a password. Let's hence default to a less
* confusing string in that case. */
arg_message = strdup("Input:");
if (!arg_message)
return log_oom();
}
return 1;
}
static int run(int argc, char *argv[]) {
_cleanup_strv_free_erase_ char **l = NULL;
usec_t timeout;
int r;
log_show_color(true);
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
if (arg_timeout > 0)
timeout = usec_add(now(CLOCK_MONOTONIC), arg_timeout);
else
timeout = 0;
r = ask_password_auto(arg_message, arg_icon, arg_id, arg_key_name, arg_credential_name ?: "password", timeout, arg_flags, &l);
if (r < 0)
return log_error_errno(r, "Failed to query password: %m");
STRV_FOREACH(p, l) {
if (!arg_no_output) {
if (arg_newline)
puts(*p);
else
fputs(*p, stdout);
}
fflush(stdout);
if (!arg_multiple)
break;
}
return 0;
}
DEFINE_MAIN_FUNCTION(run);
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