/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include #include "ask-password-api.h" #include "build.h" #include "constants.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$sQuery the user for a passphrase, via the TTY or a UI agent.%4$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 ImportCredential=, LoadCredential= or\n" " SetCredential= 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" " --user Ask only our own user's agents\n" " --system Ask agents of the system and of all users\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, ARG_USER, ARG_SYSTEM, }; 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 }, { "user", no_argument, NULL, ARG_USER }, { "system", no_argument, NULL, ARG_SYSTEM }, {} }; 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 { r = parse_boolean_argument("--echo=", optarg, NULL); if (r < 0) return r; SET_FLAG(arg_flags, ASK_PASSWORD_ECHO, r); SET_FLAG(arg_flags, ASK_PASSWORD_SILENT, !r); } 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 ARG_USER: arg_flags |= ASK_PASSWORD_USER; break; case ARG_SYSTEM: arg_flags &= ~ASK_PASSWORD_USER; 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 { r = parse_boolean_argument("--emoji=", emoji, NULL); if (r < 0) return r; SET_FLAG(arg_flags, ASK_PASSWORD_HIDE_EMOJI, !r); } 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_setup(); /* Unprivileged? Then imply ASK_PASSWORD_USER by default */ SET_FLAG(arg_flags, ASK_PASSWORD_USER, geteuid() != 0); r = parse_argv(argc, argv); if (r <= 0) return r; timeout = arg_timeout > 0 ? usec_add(now(CLOCK_MONOTONIC), arg_timeout) : 0; AskPasswordRequest req = { .message = arg_message, .icon = arg_icon, .id = arg_id, .keyring = arg_key_name, .credential = arg_credential_name ?: "password", }; r = ask_password_auto(&req, 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);