[thirdparty/systemd.git] / src / shared / ask-password-api.c

/* SPDX-License-Identifier: LGPL-2.1+ */

#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <poll.h>
#include <signal.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/inotify.h>
#include <sys/signalfd.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/un.h>
#include <termios.h>
#include <unistd.h>

#include "alloc-util.h"
#include "ask-password-api.h"
#include "fd-util.h"
#include "fileio.h"
#include "format-util.h"
#include "io-util.h"
#include "log.h"
#include "macro.h"
#include "missing.h"
#include "mkdir.h"
#include "process-util.h"
#include "random-util.h"
#include "signal-util.h"
#include "socket-util.h"
#include "string-util.h"
#include "strv.h"
#include "terminal-util.h"
#include "time-util.h"
#include "umask-util.h"
#include "utf8.h"
#include "util.h"

#define KEYRING_TIMEOUT_USEC ((5 * USEC_PER_MINUTE) / 2)

static int lookup_key(const char *keyname, key_serial_t *ret) {
        key_serial_t serial;

        assert(keyname);
        assert(ret);

        serial = request_key("user", keyname, NULL, 0);
        if (serial == -1)
                return negative_errno();

        *ret = serial;
        return 0;
}

static int retrieve_key(key_serial_t serial, char ***ret) {
        _cleanup_free_ char *p = NULL;
        long m = 100, n;
        char **l;

        assert(ret);

        for (;;) {
                p = new(char, m);
                if (!p)
                        return -ENOMEM;

                n = keyctl(KEYCTL_READ, (unsigned long) serial, (unsigned long) p, (unsigned long) m, 0);
                if (n < 0)
                        return -errno;

                if (n < m)
                        break;

                explicit_bzero(p, n);
                free(p);
                m *= 2;
        }

        l = strv_parse_nulstr(p, n);
        if (!l)
                return -ENOMEM;

        explicit_bzero(p, n);

        *ret = l;
        return 0;
}

static int add_to_keyring(const char *keyname, AskPasswordFlags flags, char **passwords) {
        _cleanup_strv_free_erase_ char **l = NULL;
        _cleanup_free_ char *p = NULL;
        key_serial_t serial;
        size_t n;
        int r;

        assert(keyname);
        assert(passwords);

        if (!(flags & ASK_PASSWORD_PUSH_CACHE))
                return 0;

        r = lookup_key(keyname, &serial);
        if (r >= 0) {
                r = retrieve_key(serial, &l);
                if (r < 0)
                        return r;
        } else if (r != -ENOKEY)
                return r;

        r = strv_extend_strv(&l, passwords, true);
        if (r <= 0)
                return r;

        r = strv_make_nulstr(l, &p, &n);
        if (r < 0)
                return r;

        serial = add_key("user", keyname, p, n, KEY_SPEC_USER_KEYRING);
        explicit_bzero(p, n);
        if (serial == -1)
                return -errno;

        if (keyctl(KEYCTL_SET_TIMEOUT,
                   (unsigned long) serial,
                   (unsigned long) DIV_ROUND_UP(KEYRING_TIMEOUT_USEC, USEC_PER_SEC), 0, 0) < 0)
                log_debug_errno(errno, "Failed to adjust timeout: %m");

        log_debug("Added key to keyring as %" PRIi32 ".", serial);

        return 1;
}

static int add_to_keyring_and_log(const char *keyname, AskPasswordFlags flags, char **passwords) {
        int r;

        assert(keyname);
        assert(passwords);

        r = add_to_keyring(keyname, flags, passwords);
        if (r < 0)
                return log_debug_errno(r, "Failed to add password to keyring: %m");

        return 0;
}

int ask_password_keyring(const char *keyname, AskPasswordFlags flags, char ***ret) {

        key_serial_t serial;
        int r;

        assert(keyname);
        assert(ret);

        if (!(flags & ASK_PASSWORD_ACCEPT_CACHED))
                return -EUNATCH;

        r = lookup_key(keyname, &serial);
        if (r == -ENOSYS) /* when retrieving the distinction doesn't matter */
                return -ENOKEY;
        if (r < 0)
                return r;

        return retrieve_key(serial, ret);
}

static void backspace_chars(int ttyfd, size_t p) {

        if (ttyfd < 0)
                return;

        while (p > 0) {
                p--;

                loop_write(ttyfd, "\b \b", 3, false);
        }
}

static void backspace_string(int ttyfd, const char *str) {
        size_t m;

        assert(str);

        if (ttyfd < 0)
                return;

        /* Backspaces through enough characters to entirely undo printing of the specified string. */

        m = utf8_n_codepoints(str);
        if (m == (size_t) -1)
                m = strlen(str); /* Not a valid UTF-8 string? If so, let's backspace the number of bytes output. Most
                                  * likely this happened because we are not in an UTF-8 locale, and in that case that
                                  * is the correct thing to do. And even if it's not, terminals tend to stop
                                  * backspacing at the leftmost column, hence backspacing too much should be mostly
                                  * OK. */

        backspace_chars(ttyfd, m);
}

int ask_password_tty(
                int ttyfd,
                const char *message,
                const char *keyname,
                usec_t until,
                AskPasswordFlags flags,
                const char *flag_file,
                char **ret) {

        enum {
                POLL_TTY,
                POLL_INOTIFY,
                _POLL_MAX,
        };

        bool reset_tty = false, dirty = false, use_color = false;
        _cleanup_close_ int cttyfd = -1, notify = -1;
        struct termios old_termios, new_termios;
        char passphrase[LINE_MAX + 1] = {}, *x;
        struct pollfd pollfd[_POLL_MAX];
        size_t p = 0, codepoint = 0;
        int r;

        assert(ret);

        if (flags & ASK_PASSWORD_NO_TTY)
                return -EUNATCH;

        if (!message)
                message = "Password:";

        if (flag_file) {
                notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK);
                if (notify < 0)
                        return -errno;

                if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0)
                        return -errno;
        }

        /* If the caller didn't specify a TTY, then use the controlling tty, if we can. */
        if (ttyfd < 0)
                ttyfd = cttyfd = open("/dev/tty", O_RDWR|O_NOCTTY|O_CLOEXEC);

        if (ttyfd >= 0) {
                if (tcgetattr(ttyfd, &old_termios) < 0)
                        return -errno;

                if (flags & ASK_PASSWORD_CONSOLE_COLOR)
                        use_color = dev_console_colors_enabled();
                else
                        use_color = colors_enabled();

                if (use_color)
                        (void) loop_write(ttyfd, ANSI_HIGHLIGHT, STRLEN(ANSI_HIGHLIGHT), false);

                (void) loop_write(ttyfd, message, strlen(message), false);
                (void) loop_write(ttyfd, " ", 1, false);

                if (use_color)
                        (void) loop_write(ttyfd, ANSI_NORMAL, STRLEN(ANSI_NORMAL), false);

                new_termios = old_termios;
                new_termios.c_lflag &= ~(ICANON|ECHO);
                new_termios.c_cc[VMIN] = 1;
                new_termios.c_cc[VTIME] = 0;

                if (tcsetattr(ttyfd, TCSADRAIN, &new_termios) < 0) {
                        r = -errno;
                        goto finish;
                }

                reset_tty = true;
        }

        pollfd[POLL_TTY] = (struct pollfd) {
                .fd = ttyfd >= 0 ? ttyfd : STDIN_FILENO,
                .events = POLLIN,
        };
        pollfd[POLL_INOTIFY] = (struct pollfd) {
                .fd = notify,
                .events = POLLIN,
        };

        for (;;) {
                int sleep_for = -1, k;
                ssize_t n;
                char c;

                if (until > 0) {
                        usec_t y;

                        y = now(CLOCK_MONOTONIC);

                        if (y > until) {
                                r = -ETIME;
                                goto finish;
                        }

                        sleep_for = (int) DIV_ROUND_UP(until - y, USEC_PER_MSEC);
                }

                if (flag_file)
                        if (access(flag_file, F_OK) < 0) {
                                r = -errno;
                                goto finish;
                        }

                k = poll(pollfd, notify >= 0 ? 2 : 1, sleep_for);
                if (k < 0) {
                        if (errno == EINTR)
                                continue;

                        r = -errno;
                        goto finish;
                } else if (k == 0) {
                        r = -ETIME;
                        goto finish;
                }

                if (notify >= 0 && pollfd[POLL_INOTIFY].revents != 0)
                        (void) flush_fd(notify);

                if (pollfd[POLL_TTY].revents == 0)
                        continue;

                n = read(ttyfd >= 0 ? ttyfd : STDIN_FILENO, &c, 1);
                if (n < 0) {
                        if (IN_SET(errno, EINTR, EAGAIN))
                                continue;

                        r = -errno;
                        goto finish;

                }

                /* We treat EOF, newline and NUL byte all as valid end markers */
                if (n == 0 || c == '\n' || c == 0)
                        break;

                if (c == 21) { /* C-u */

                        if (!(flags & ASK_PASSWORD_SILENT))
                                backspace_string(ttyfd, passphrase);

                        explicit_bzero(passphrase, sizeof(passphrase));
                        p = codepoint = 0;

                } else if (IN_SET(c, '\b', 127)) {

                        if (p > 0) {
                                size_t q;

                                if (!(flags & ASK_PASSWORD_SILENT))
                                        backspace_chars(ttyfd, 1);

                                /* Remove a full UTF-8 codepoint from the end. For that, figure out where the last one
                                 * begins */
                                q = 0;
                                for (;;) {
                                        size_t z;

                                        z = utf8_encoded_valid_unichar(passphrase + q);
                                        if (z == 0) {
                                                q = (size_t) -1; /* Invalid UTF8! */
                                                break;
                                        }

                                        if (q + z >= p) /* This one brings us over the edge */
                                                break;

                                        q += z;
                                }

                                p = codepoint = q == (size_t) -1 ? p - 1 : q;
                                explicit_bzero(passphrase + p, sizeof(passphrase) - p);

                        } else if (!dirty && !(flags & ASK_PASSWORD_SILENT)) {

                                flags |= ASK_PASSWORD_SILENT;

                                /* There are two ways to enter silent mode. Either by pressing backspace as first key
                                 * (and only as first key), or ... */

                                if (ttyfd >= 0)
                                        (void) loop_write(ttyfd, "(no echo) ", 10, false);

                        } else if (ttyfd >= 0)
                                (void) loop_write(ttyfd, "\a", 1, false);

                } else if (c == '\t' && !(flags & ASK_PASSWORD_SILENT)) {

                        backspace_string(ttyfd, passphrase);
                        flags |= ASK_PASSWORD_SILENT;

                        /* ... or by pressing TAB at any time. */

                        if (ttyfd >= 0)
                                (void) loop_write(ttyfd, "(no echo) ", 10, false);

                } else if (p >= sizeof(passphrase)-1) {

                        /* Reached the size limit */
                        if (ttyfd >= 0)
                                (void) loop_write(ttyfd, "\a", 1, false);

                } else {
                        passphrase[p++] = c;

                        if (!(flags & ASK_PASSWORD_SILENT) && ttyfd >= 0) {
                                /* Check if we got a complete UTF-8 character now. If so, let's output one '*'. */
                                n = utf8_encoded_valid_unichar(passphrase + codepoint);
                                if (n >= 0) {
                                        codepoint = p;
                                        (void) loop_write(ttyfd, (flags & ASK_PASSWORD_ECHO) ? &c : "*", 1, false);
                                }
                        }

                        dirty = true;
                }

                /* Let's forget this char, just to not keep needlessly copies of key material around */
                c = 'x';
        }

        x = strndup(passphrase, p);
        explicit_bzero(passphrase, sizeof(passphrase));
        if (!x) {
                r = -ENOMEM;
                goto finish;
        }

        if (keyname)
                (void) add_to_keyring_and_log(keyname, flags, STRV_MAKE(x));

        *ret = x;
        r = 0;

finish:
        if (ttyfd >= 0 && reset_tty) {
                (void) loop_write(ttyfd, "\n", 1, false);
                (void) tcsetattr(ttyfd, TCSADRAIN, &old_termios);
        }

        return r;
}

static int create_socket(char **ret) {
        _cleanup_free_ char *path = NULL;
        union sockaddr_union sa = {};
        _cleanup_close_ int fd = -1;
        int salen, r;

        assert(ret);

        fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
        if (fd < 0)
                return -errno;

        if (asprintf(&path, "/run/systemd/ask-password/sck.%" PRIx64, random_u64()) < 0)
                return -ENOMEM;

        salen = sockaddr_un_set_path(&sa.un, path);
        if (salen < 0)
                return salen;

        RUN_WITH_UMASK(0177) {
                if (bind(fd, &sa.sa, salen) < 0)
                        return -errno;
        }

        r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true);
        if (r < 0)
                return r;

        *ret = TAKE_PTR(path);
        return TAKE_FD(fd);
}

int ask_password_agent(
                const char *message,
                const char *icon,
                const char *id,
                const char *keyname,
                usec_t until,
                AskPasswordFlags flags,
                char ***ret) {

        enum {
                FD_SOCKET,
                FD_SIGNAL,
                _FD_MAX
        };

        _cleanup_close_ int socket_fd = -1, signal_fd = -1, fd = -1;
        char temp[] = "/run/systemd/ask-password/tmp.XXXXXX";
        char final[sizeof(temp)] = "";
        _cleanup_free_ char *socket_name = NULL;
        _cleanup_strv_free_ char **l = NULL;
        _cleanup_fclose_ FILE *f = NULL;
        struct pollfd pollfd[_FD_MAX];
        sigset_t mask, oldmask;
        int r;

        assert(ret);

        if (flags & ASK_PASSWORD_NO_AGENT)
                return -EUNATCH;

        assert_se(sigemptyset(&mask) >= 0);
        assert_se(sigset_add_many(&mask, SIGINT, SIGTERM, -1) >= 0);
        assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) >= 0);

        (void) mkdir_p_label("/run/systemd/ask-password", 0755);

        fd = mkostemp_safe(temp);
        if (fd < 0) {
                r = fd;
                goto finish;
        }

        (void) fchmod(fd, 0644);

        f = fdopen(fd, "w");
        if (!f) {
                r = -errno;
                goto finish;
        }

        fd = -1;

        signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
        if (signal_fd < 0) {
                r = -errno;
                goto finish;
        }

        socket_fd = create_socket(&socket_name);
        if (socket_fd < 0) {
                r = socket_fd;
                goto finish;
        }

        fprintf(f,
                "[Ask]\n"
                "PID="PID_FMT"\n"
                "Socket=%s\n"
                "AcceptCached=%i\n"
                "Echo=%i\n"
                "NotAfter="USEC_FMT"\n",
                getpid_cached(),
                socket_name,
                (flags & ASK_PASSWORD_ACCEPT_CACHED) ? 1 : 0,
                (flags & ASK_PASSWORD_ECHO) ? 1 : 0,
                until);

        if (message)
                fprintf(f, "Message=%s\n", message);

        if (icon)
                fprintf(f, "Icon=%s\n", icon);

        if (id)
                fprintf(f, "Id=%s\n", id);

        r = fflush_and_check(f);
        if (r < 0)
                goto finish;

        memcpy(final, temp, sizeof(temp));

        final[sizeof(final)-11] = 'a';
        final[sizeof(final)-10] = 's';
        final[sizeof(final)-9] = 'k';

        if (rename(temp, final) < 0) {
                r = -errno;
                goto finish;
        }

        zero(pollfd);
        pollfd[FD_SOCKET].fd = socket_fd;
        pollfd[FD_SOCKET].events = POLLIN;
        pollfd[FD_SIGNAL].fd = signal_fd;
        pollfd[FD_SIGNAL].events = POLLIN;

        for (;;) {
                char passphrase[LINE_MAX+1];
                struct msghdr msghdr;
                struct iovec iovec;
                struct ucred *ucred;
                union {
                        struct cmsghdr cmsghdr;
                        uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
                } control;
                ssize_t n;
                int k;
                usec_t t;

                t = now(CLOCK_MONOTONIC);

                if (until > 0 && until <= t) {
                        r = -ETIME;
                        goto finish;
                }

                k = poll(pollfd, _FD_MAX, until > 0 ? (int) ((until-t)/USEC_PER_MSEC) : -1);
                if (k < 0) {
                        if (errno == EINTR)
                                continue;

                        r = -errno;
                        goto finish;
                }

                if (k <= 0) {
                        r = -ETIME;
                        goto finish;
                }

                if (pollfd[FD_SIGNAL].revents & POLLIN) {
                        r = -EINTR;
                        goto finish;
                }

                if (pollfd[FD_SOCKET].revents != POLLIN) {
                        r = -EIO;
                        goto finish;
                }

                zero(iovec);
                iovec.iov_base = passphrase;
                iovec.iov_len = sizeof(passphrase);

                zero(control);
                zero(msghdr);
                msghdr.msg_iov = &iovec;
                msghdr.msg_iovlen = 1;
                msghdr.msg_control = &control;
                msghdr.msg_controllen = sizeof(control);

                n = recvmsg(socket_fd, &msghdr, 0);
                if (n < 0) {
                        if (IN_SET(errno, EAGAIN, EINTR))
                                continue;

                        r = -errno;
                        goto finish;
                }

                cmsg_close_all(&msghdr);

                if (n <= 0) {
                        log_debug("Message too short");
                        continue;
                }

                if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
                    control.cmsghdr.cmsg_level != SOL_SOCKET ||
                    control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
                    control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
                        log_debug("Received message without credentials. Ignoring.");
                        continue;
                }

                ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
                if (ucred->uid != 0) {
                        log_debug("Got request from unprivileged user. Ignoring.");
                        continue;
                }

                if (passphrase[0] == '+') {
                        /* An empty message refers to the empty password */
                        if (n == 1)
                                l = strv_new("", NULL);
                        else
                                l = strv_parse_nulstr(passphrase+1, n-1);
                        explicit_bzero(passphrase, n);
                        if (!l) {
                                r = -ENOMEM;
                                goto finish;
                        }

                        if (strv_isempty(l)) {
                                l = strv_free(l);
                                log_debug("Invalid packet");
                                continue;
                        }

                        break;
                }

                if (passphrase[0] == '-') {
                        r = -ECANCELED;
                        goto finish;
                }

                log_debug("Invalid packet");
        }

        if (keyname)
                (void) add_to_keyring_and_log(keyname, flags, l);

        *ret = TAKE_PTR(l);
        r = 0;

finish:
        if (socket_name)
                (void) unlink(socket_name);

        (void) unlink(temp);

        if (final[0])
                (void) unlink(final);

        assert_se(sigprocmask(SIG_SETMASK, &oldmask, NULL) == 0);
        return r;
}

int ask_password_auto(
                const char *message,
                const char *icon,
                const char *id,
                const char *keyname,
                usec_t until,
                AskPasswordFlags flags,
                char ***ret) {

        int r;

        assert(ret);

        if ((flags & ASK_PASSWORD_ACCEPT_CACHED) && keyname) {
                r = ask_password_keyring(keyname, flags, ret);
                if (r != -ENOKEY)
                        return r;
        }

        if (!(flags & ASK_PASSWORD_NO_TTY) && isatty(STDIN_FILENO)) {
                char *s = NULL, **l = NULL;

                r = ask_password_tty(-1, message, keyname, until, flags, NULL, &s);
                if (r < 0)
                        return r;

                r = strv_push(&l, s);
                if (r < 0) {
                        string_erase(s);
                        free(s);
                        return -ENOMEM;
                }

                *ret = l;
                return 0;
        }

        if (!(flags & ASK_PASSWORD_NO_AGENT))
                return ask_password_agent(message, icon, id, keyname, until, flags, ret);

        return -EUNATCH;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
00843602	2
7f4e0805 LP	3	#include <errno.h>
7f4e0805 LP	4	#include <fcntl.h>
a8fbdf54 TA	5	#include <inttypes.h>
a8fbdf54 TA	6	#include <limits.h>
00843602	7	#include <poll.h>
a8fbdf54	8	#include <signal.h>
00843602	9	#include <stdbool.h>
7f4e0805	10	#include <stddef.h>
a8fbdf54 TA	11	#include <stdint.h>
	12	#include <stdio.h>
	13	#include <stdlib.h>
00843602 LP	14	#include <string.h>
00843602 LP	15	#include <sys/inotify.h>
7f4e0805	16	#include <sys/signalfd.h>
00843602	17	#include <sys/socket.h>
a8fbdf54 TA	18	#include <sys/stat.h>
	19	#include <sys/time.h>
	20	#include <sys/uio.h>
00843602 LP	21	#include <sys/un.h>
	22	#include <termios.h>
	23	#include <unistd.h>
7f4e0805	24
b5efdb8a	25	#include "alloc-util.h"
3ffd4af2 LP	26	#include "ask-password-api.h"
3ffd4af2 LP	27	#include "fd-util.h"
0d39fa9c	28	#include "fileio.h"
f97b34a6	29	#include "format-util.h"
c004493c	30	#include "io-util.h"
a8fbdf54 TA	31	#include "log.h"
a8fbdf54 TA	32	#include "macro.h"
e287086b	33	#include "missing.h"
49e942b2	34	#include "mkdir.h"
df0ff127	35	#include "process-util.h"
3df3e884	36	#include "random-util.h"
24882e06	37	#include "signal-util.h"
00843602	38	#include "socket-util.h"
07630cea	39	#include "string-util.h"
00843602 LP	40	#include "strv.h"
00843602 LP	41	#include "terminal-util.h"
a8fbdf54	42	#include "time-util.h"
affb60b1	43	#include "umask-util.h"
f3149d57	44	#include "utf8.h"
00843602	45	#include "util.h"
7f4e0805	46
e287086b LP	47	#define KEYRING_TIMEOUT_USEC ((5 * USEC_PER_MINUTE) / 2)
	48
	49	static int lookup_key(const char keyname, key_serial_t ret) {
	50	key_serial_t serial;
	51
	52	assert(keyname);
	53	assert(ret);
	54
	55	serial = request_key("user", keyname, NULL, 0);
	56	if (serial == -1)
9c4615fb	57	return negative_errno();
e287086b LP	58
	59	*ret = serial;
	60	return 0;
	61	}
	62
	63	static int retrieve_key(key_serial_t serial, char ***ret) {
	64	_cleanup_free_ char *p = NULL;
	65	long m = 100, n;
	66	char **l;
	67
	68	assert(ret);
	69
	70	for (;;) {
	71	p = new(char, m);
	72	if (!p)
	73	return -ENOMEM;
	74
	75	n = keyctl(KEYCTL_READ, (unsigned long) serial, (unsigned long) p, (unsigned long) m, 0);
	76	if (n < 0)
	77	return -errno;
	78
	79	if (n < m)
	80	break;
	81
2d26d8e0	82	explicit_bzero(p, n);
e287086b LP	83	free(p);
	84	m *= 2;
	85	}
	86
	87	l = strv_parse_nulstr(p, n);
	88	if (!l)
	89	return -ENOMEM;
	90
2d26d8e0	91	explicit_bzero(p, n);
1602b008	92
e287086b LP	93	*ret = l;
	94	return 0;
	95	}
	96
	97	static int add_to_keyring(const char keyname, AskPasswordFlags flags, char *passwords) {
ab84f5b9	98	_cleanup_strv_free_erase_ char **l = NULL;
e287086b LP	99	_cleanup_free_ char *p = NULL;
	100	key_serial_t serial;
	101	size_t n;
	102	int r;
	103
	104	assert(keyname);
	105	assert(passwords);
	106
	107	if (!(flags & ASK_PASSWORD_PUSH_CACHE))
	108	return 0;
	109
	110	r = lookup_key(keyname, &serial);
	111	if (r >= 0) {
	112	r = retrieve_key(serial, &l);
	113	if (r < 0)
	114	return r;
	115	} else if (r != -ENOKEY)
	116	return r;
	117
	118	r = strv_extend_strv(&l, passwords, true);
	119	if (r <= 0)
	120	return r;
	121
	122	r = strv_make_nulstr(l, &p, &n);
	123	if (r < 0)
	124	return r;
	125
b60df13b	126	serial = add_key("user", keyname, p, n, KEY_SPEC_USER_KEYRING);
2d26d8e0	127	explicit_bzero(p, n);
e287086b LP	128	if (serial == -1)
	129	return -errno;
	130
	131	if (keyctl(KEYCTL_SET_TIMEOUT,
	132	(unsigned long) serial,
	133	(unsigned long) DIV_ROUND_UP(KEYRING_TIMEOUT_USEC, USEC_PER_SEC), 0, 0) < 0)
	134	log_debug_errno(errno, "Failed to adjust timeout: %m");
	135
	136	log_debug("Added key to keyring as %" PRIi32 ".", serial);
	137
	138	return 1;
	139	}
	140
	141	static int add_to_keyring_and_log(const char keyname, AskPasswordFlags flags, char *passwords) {
	142	int r;
	143
	144	assert(keyname);
	145	assert(passwords);
	146
	147	r = add_to_keyring(keyname, flags, passwords);
	148	if (r < 0)
	149	return log_debug_errno(r, "Failed to add password to keyring: %m");
	150
	151	return 0;
	152	}
	153
	154	int ask_password_keyring(const char keyname, AskPasswordFlags flags, char **ret) {
	155
	156	key_serial_t serial;
	157	int r;
	158
	159	assert(keyname);
	160	assert(ret);
	161
	162	if (!(flags & ASK_PASSWORD_ACCEPT_CACHED))
	163	return -EUNATCH;
	164
	165	r = lookup_key(keyname, &serial);
	166	if (r == -ENOSYS) /* when retrieving the distinction doesn't matter */
	167	return -ENOKEY;
	168	if (r < 0)
	169	return r;
	170
	171	return retrieve_key(serial, ret);
	172	}
	173
58fc840b LP	174	static void backspace_chars(int ttyfd, size_t p) {
	175
	176	if (ttyfd < 0)
	177	return;
	178
	179	while (p > 0) {
	180	p--;
	181
	182	loop_write(ttyfd, "\b \b", 3, false);
	183	}
	184	}
	185
fd6ac62c LP	186	static void backspace_string(int ttyfd, const char *str) {
	187	size_t m;
	188
	189	assert(str);
	190
	191	if (ttyfd < 0)
	192	return;
	193
f95dbcc2	194	/* Backspaces through enough characters to entirely undo printing of the specified string. */
fd6ac62c LP	195
	196	m = utf8_n_codepoints(str);
	197	if (m == (size_t) -1)
	198	m = strlen(str); /* Not a valid UTF-8 string? If so, let's backspace the number of bytes output. Most
	199	* likely this happened because we are not in an UTF-8 locale, and in that case that
	200	* is the correct thing to do. And even if it's not, terminals tend to stop
	201	* backspacing at the leftmost column, hence backspacing too much should be mostly
	202	* OK. */
	203
	204	backspace_chars(ttyfd, m);
	205	}
	206
7f4e0805	207	int ask_password_tty(
daa55720	208	int ttyfd,
7f4e0805	209	const char *message,
e287086b	210	const char *keyname,
7f4e0805	211	usec_t until,
e287086b	212	AskPasswordFlags flags,
7f4e0805	213	const char *flag_file,
e287086b	214	char **ret) {
7f4e0805	215
088dcd8e LP	216	enum {
	217	POLL_TTY,
	218	POLL_INOTIFY,
	219	_POLL_MAX,
	220	};
	221
c2b32159	222	bool reset_tty = false, dirty = false, use_color = false;
daa55720	223	_cleanup_close_ int cttyfd = -1, notify = -1;
7f4e0805	224	struct termios old_termios, new_termios;
f3149d57	225	char passphrase[LINE_MAX + 1] = {}, *x;
088dcd8e	226	struct pollfd pollfd[_POLL_MAX];
f3149d57	227	size_t p = 0, codepoint = 0;
088dcd8e	228	int r;
7f4e0805	229
e287086b LP	230	assert(ret);
	231
	232	if (flags & ASK_PASSWORD_NO_TTY)
	233	return -EUNATCH;
	234
	235	if (!message)
	236	message = "Password:";
7f4e0805 LP	237
7f4e0805 LP	238	if (flag_file) {
981e4cd3	239	notify = inotify_init1(IN_CLOEXEC\|IN_NONBLOCK);
a497a296 LP	240	if (notify < 0)
	241	return -errno;
	242
	243	if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0)
	244	return -errno;
7f4e0805 LP	245	}
7f4e0805 LP	246
daa55720 LP	247	/* If the caller didn't specify a TTY, then use the controlling tty, if we can. */
	248	if (ttyfd < 0)
	249	ttyfd = cttyfd = open("/dev/tty", O_RDWR\|O_NOCTTY\|O_CLOEXEC);
7f4e0805	250
daa55720	251	if (ttyfd >= 0) {
a497a296 LP	252	if (tcgetattr(ttyfd, &old_termios) < 0)
a497a296 LP	253	return -errno;
7f4e0805	254
c2b32159 LP	255	if (flags & ASK_PASSWORD_CONSOLE_COLOR)
	256	use_color = dev_console_colors_enabled();
	257	else
	258	use_color = colors_enabled();
	259
	260	if (use_color)
ac7a9674 LP	261	(void) loop_write(ttyfd, ANSI_HIGHLIGHT, STRLEN(ANSI_HIGHLIGHT), false);
	262
	263	(void) loop_write(ttyfd, message, strlen(message), false);
	264	(void) loop_write(ttyfd, " ", 1, false);
	265
c2b32159	266	if (use_color)
ac7a9674	267	(void) loop_write(ttyfd, ANSI_NORMAL, STRLEN(ANSI_NORMAL), false);
7f4e0805 LP	268
	269	new_termios = old_termios;
	270	new_termios.c_lflag &= ~(ICANON\|ECHO);
	271	new_termios.c_cc[VMIN] = 1;
	272	new_termios.c_cc[VTIME] = 0;
	273
	274	if (tcsetattr(ttyfd, TCSADRAIN, &new_termios) < 0) {
	275	r = -errno;
	276	goto finish;
	277	}
	278
	279	reset_tty = true;
	280	}
	281
70dee475 LP	282	pollfd[POLL_TTY] = (struct pollfd) {
	283	.fd = ttyfd >= 0 ? ttyfd : STDIN_FILENO,
	284	.events = POLLIN,
	285	};
	286	pollfd[POLL_INOTIFY] = (struct pollfd) {
	287	.fd = notify,
	288	.events = POLLIN,
	289	};
7f4e0805 LP	290
7f4e0805 LP	291	for (;;) {
7f4e0805 LP	292	int sleep_for = -1, k;
7f4e0805 LP	293	ssize_t n;
fd6ac62c	294	char c;
7f4e0805 LP	295
	296	if (until > 0) {
	297	usec_t y;
	298
	299	y = now(CLOCK_MONOTONIC);
	300
	301	if (y > until) {
7ded2e28	302	r = -ETIME;
7f4e0805 LP	303	goto finish;
	304	}
	305
c9eb4a00	306	sleep_for = (int) DIV_ROUND_UP(until - y, USEC_PER_MSEC);
7f4e0805 LP	307	}
	308
	309	if (flag_file)
	310	if (access(flag_file, F_OK) < 0) {
	311	r = -errno;
	312	goto finish;
	313	}
	314
e287086b	315	k = poll(pollfd, notify >= 0 ? 2 : 1, sleep_for);
981e4cd3	316	if (k < 0) {
7f4e0805 LP	317	if (errno == EINTR)
	318	continue;
	319
	320	r = -errno;
	321	goto finish;
	322	} else if (k == 0) {
ccc80078	323	r = -ETIME;
7f4e0805 LP	324	goto finish;
	325	}
	326
e287086b	327	if (notify >= 0 && pollfd[POLL_INOTIFY].revents != 0)
665dfe93	328	(void) flush_fd(notify);
7f4e0805 LP	329
	330	if (pollfd[POLL_TTY].revents == 0)
	331	continue;
	332
981e4cd3 LP	333	n = read(ttyfd >= 0 ? ttyfd : STDIN_FILENO, &c, 1);
981e4cd3 LP	334	if (n < 0) {
3742095b	335	if (IN_SET(errno, EINTR, EAGAIN))
7f4e0805 LP	336	continue;
	337
	338	r = -errno;
	339	goto finish;
	340
fd6ac62c	341	}
7f4e0805	342
fd6ac62c LP	343	/* We treat EOF, newline and NUL byte all as valid end markers */
fd6ac62c LP	344	if (n == 0 \|\| c == '\n' \|\| c == 0)
7f4e0805	345	break;
fd6ac62c LP	346
fd6ac62c LP	347	if (c == 21) { /* C-u */
7f4e0805	348
e287086b	349	if (!(flags & ASK_PASSWORD_SILENT))
fd6ac62c LP	350	backspace_string(ttyfd, passphrase);
	351
	352	explicit_bzero(passphrase, sizeof(passphrase));
	353	p = codepoint = 0;
7f4e0805	354
4c701096	355	} else if (IN_SET(c, '\b', 127)) {
58fc840b LP	356
58fc840b LP	357	if (p > 0) {
fd6ac62c	358	size_t q;
58fc840b	359
e287086b	360	if (!(flags & ASK_PASSWORD_SILENT))
58fc840b LP	361	backspace_chars(ttyfd, 1);
58fc840b LP	362
fd6ac62c LP	363	/* Remove a full UTF-8 codepoint from the end. For that, figure out where the last one
	364	* begins */
	365	q = 0;
	366	for (;;) {
	367	size_t z;
	368
	369	z = utf8_encoded_valid_unichar(passphrase + q);
	370	if (z == 0) {
	371	q = (size_t) -1; /* Invalid UTF8! */
	372	break;
	373	}
	374
	375	if (q + z >= p) /* This one brings us over the edge */
	376	break;
	377
	378	q += z;
	379	}
	380
	381	p = codepoint = q == (size_t) -1 ? p - 1 : q;
	382	explicit_bzero(passphrase + p, sizeof(passphrase) - p);
	383
e287086b	384	} else if (!dirty && !(flags & ASK_PASSWORD_SILENT)) {
441dfe09	385
e287086b	386	flags \|= ASK_PASSWORD_SILENT;
441dfe09	387
fd6ac62c LP	388	/* There are two ways to enter silent mode. Either by pressing backspace as first key
	389	* (and only as first key), or ... */
	390
441dfe09	391	if (ttyfd >= 0)
ac7a9674	392	(void) loop_write(ttyfd, "(no echo) ", 10, false);
441dfe09	393
58fc840b	394	} else if (ttyfd >= 0)
ac7a9674	395	(void) loop_write(ttyfd, "\a", 1, false);
7f4e0805	396
e287086b	397	} else if (c == '\t' && !(flags & ASK_PASSWORD_SILENT)) {
58fc840b	398
fd6ac62c	399	backspace_string(ttyfd, passphrase);
e287086b	400	flags \|= ASK_PASSWORD_SILENT;
58fc840b	401
441dfe09 LP	402	/* ... or by pressing TAB at any time. */
441dfe09 LP	403
58fc840b	404	if (ttyfd >= 0)
ac7a9674	405	(void) loop_write(ttyfd, "(no echo) ", 10, false);
036eeac5	406
fd6ac62c LP	407	} else if (p >= sizeof(passphrase)-1) {
	408
	409	/* Reached the size limit */
	410	if (ttyfd >= 0)
	411	(void) loop_write(ttyfd, "\a", 1, false);
	412
	413	} else {
7f4e0805 LP	414	passphrase[p++] = c;
7f4e0805 LP	415
f3149d57	416	if (!(flags & ASK_PASSWORD_SILENT) && ttyfd >= 0) {
fd6ac62c	417	/* Check if we got a complete UTF-8 character now. If so, let's output one ''. /
f3149d57 ZJS	418	n = utf8_encoded_valid_unichar(passphrase + codepoint);
	419	if (n >= 0) {
	420	codepoint = p;
ac7a9674	421	(void) loop_write(ttyfd, (flags & ASK_PASSWORD_ECHO) ? &c : "*", 1, false);
f3149d57 ZJS	422	}
f3149d57 ZJS	423	}
441dfe09 LP	424
441dfe09 LP	425	dirty = true;
7f4e0805	426	}
1602b008	427
fd6ac62c	428	/* Let's forget this char, just to not keep needlessly copies of key material around */
1602b008	429	c = 'x';
7f4e0805 LP	430	}
7f4e0805 LP	431
981e4cd3	432	x = strndup(passphrase, p);
fd6ac62c	433	explicit_bzero(passphrase, sizeof(passphrase));
981e4cd3	434	if (!x) {
7f4e0805 LP	435	r = -ENOMEM;
	436	goto finish;
	437	}
	438
e287086b LP	439	if (keyname)
	440	(void) add_to_keyring_and_log(keyname, flags, STRV_MAKE(x));
	441
	442	*ret = x;
7f4e0805 LP	443	r = 0;
	444
	445	finish:
981e4cd3	446	if (ttyfd >= 0 && reset_tty) {
ac7a9674 LP	447	(void) loop_write(ttyfd, "\n", 1, false);
ac7a9674 LP	448	(void) tcsetattr(ttyfd, TCSADRAIN, &old_termios);
7f4e0805 LP	449	}
	450
	451	return r;
	452	}
	453
15a3e96f LP	454	static int create_socket(char **ret) {
	455	_cleanup_free_ char *path = NULL;
	456	union sockaddr_union sa = {};
00843602	457	_cleanup_close_ int fd = -1;
2ff48e98	458	int salen, r;
7f4e0805	459
15a3e96f	460	assert(ret);
7f4e0805	461
e62d8c39	462	fd = socket(AF_UNIX, SOCK_DGRAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0);
4a62c710	463	if (fd < 0)
00843602	464	return -errno;
7f4e0805	465
15a3e96f LP	466	if (asprintf(&path, "/run/systemd/ask-password/sck.%" PRIx64, random_u64()) < 0)
	467	return -ENOMEM;
	468
	469	salen = sockaddr_un_set_path(&sa.un, path);
	470	if (salen < 0)
	471	return salen;
7f4e0805	472
5c0d398d	473	RUN_WITH_UMASK(0177) {
15a3e96f	474	if (bind(fd, &sa.sa, salen) < 0)
00843602	475	return -errno;
5c0d398d	476	}
1d6702e8	477
2ff48e98 LP	478	r = setsockopt_int(fd, SOL_SOCKET, SO_PASSCRED, true);
	479	if (r < 0)
	480	return r;
7f4e0805	481
15a3e96f LP	482	*ret = TAKE_PTR(path);
15a3e96f LP	483	return TAKE_FD(fd);
7f4e0805 LP	484	}
7f4e0805 LP	485
7f4e0805 LP	486	int ask_password_agent(
	487	const char *message,
	488	const char *icon,
9fa1de96	489	const char *id,
e287086b	490	const char *keyname,
7f4e0805	491	usec_t until,
e287086b LP	492	AskPasswordFlags flags,
e287086b LP	493	char ***ret) {
7f4e0805 LP	494
	495	enum {
	496	FD_SOCKET,
	497	FD_SIGNAL,
	498	_FD_MAX
	499	};
	500
e287086b	501	_cleanup_close_ int socket_fd = -1, signal_fd = -1, fd = -1;
2b583ce6	502	char temp[] = "/run/systemd/ask-password/tmp.XXXXXX";
7f4e0805	503	char final[sizeof(temp)] = "";
981e4cd3	504	_cleanup_free_ char *socket_name = NULL;
e287086b LP	505	_cleanup_strv_free_ char **l = NULL;
e287086b LP	506	_cleanup_fclose_ FILE *f = NULL;
7f4e0805	507	struct pollfd pollfd[_FD_MAX];
e287086b	508	sigset_t mask, oldmask;
981e4cd3	509	int r;
7f4e0805	510
e287086b	511	assert(ret);
21bc923a	512
e287086b LP	513	if (flags & ASK_PASSWORD_NO_AGENT)
e287086b LP	514	return -EUNATCH;
00843602	515
72c0a2c2 LP	516	assert_se(sigemptyset(&mask) >= 0);
	517	assert_se(sigset_add_many(&mask, SIGINT, SIGTERM, -1) >= 0);
	518	assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) >= 0);
f9b72cd8	519
00843602	520	(void) mkdir_p_label("/run/systemd/ask-password", 0755);
7f4e0805	521
646853bd	522	fd = mkostemp_safe(temp);
1d6702e8	523	if (fd < 0) {
709f6e46	524	r = fd;
7f4e0805 LP	525	goto finish;
	526	}
	527
00843602	528	(void) fchmod(fd, 0644);
7f4e0805	529
981e4cd3 LP	530	f = fdopen(fd, "w");
981e4cd3 LP	531	if (!f) {
00843602	532	r = -errno;
7f4e0805 LP	533	goto finish;
	534	}
	535
	536	fd = -1;
	537
981e4cd3 LP	538	signal_fd = signalfd(-1, &mask, SFD_NONBLOCK\|SFD_CLOEXEC);
981e4cd3 LP	539	if (signal_fd < 0) {
00843602	540	r = -errno;
7f4e0805 LP	541	goto finish;
	542	}
	543
981e4cd3 LP	544	socket_fd = create_socket(&socket_name);
981e4cd3 LP	545	if (socket_fd < 0) {
7f4e0805 LP	546	r = socket_fd;
	547	goto finish;
	548	}
	549
	550	fprintf(f,
	551	"[Ask]\n"
de0671ee	552	"PID="PID_FMT"\n"
7f4e0805	553	"Socket=%s\n"
21bc923a	554	"AcceptCached=%i\n"
64845bdc	555	"Echo=%i\n"
de0671ee	556	"NotAfter="USEC_FMT"\n",
df0ff127	557	getpid_cached(),
7f4e0805	558	socket_name,
e287086b LP	559	(flags & ASK_PASSWORD_ACCEPT_CACHED) ? 1 : 0,
e287086b LP	560	(flags & ASK_PASSWORD_ECHO) ? 1 : 0,
de0671ee	561	until);
7f4e0805 LP	562
	563	if (message)
	564	fprintf(f, "Message=%s\n", message);
	565
	566	if (icon)
	567	fprintf(f, "Icon=%s\n", icon);
	568
9fa1de96 DH	569	if (id)
	570	fprintf(f, "Id=%s\n", id);
	571
dacd6cee	572	r = fflush_and_check(f);
00843602	573	if (r < 0)
7f4e0805	574	goto finish;
7f4e0805 LP	575
	576	memcpy(final, temp, sizeof(temp));
	577
	578	final[sizeof(final)-11] = 'a';
	579	final[sizeof(final)-10] = 's';
	580	final[sizeof(final)-9] = 'k';
	581
	582	if (rename(temp, final) < 0) {
00843602	583	r = -errno;
7f4e0805 LP	584	goto finish;
	585	}
	586
	587	zero(pollfd);
	588	pollfd[FD_SOCKET].fd = socket_fd;
	589	pollfd[FD_SOCKET].events = POLLIN;
	590	pollfd[FD_SIGNAL].fd = signal_fd;
	591	pollfd[FD_SIGNAL].events = POLLIN;
	592
	593	for (;;) {
	594	char passphrase[LINE_MAX+1];
	595	struct msghdr msghdr;
	596	struct iovec iovec;
	597	struct ucred *ucred;
	598	union {
	599	struct cmsghdr cmsghdr;
	600	uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
	601	} control;
	602	ssize_t n;
	603	int k;
	604	usec_t t;
	605
	606	t = now(CLOCK_MONOTONIC);
	607
7dcda352	608	if (until > 0 && until <= t) {
7f4e0805 LP	609	r = -ETIME;
	610	goto finish;
	611	}
	612
981e4cd3 LP	613	k = poll(pollfd, _FD_MAX, until > 0 ? (int) ((until-t)/USEC_PER_MSEC) : -1);
981e4cd3 LP	614	if (k < 0) {
7f4e0805 LP	615	if (errno == EINTR)
	616	continue;
	617
00843602	618	r = -errno;
7f4e0805 LP	619	goto finish;
	620	}
	621
	622	if (k <= 0) {
7f4e0805 LP	623	r = -ETIME;
	624	goto finish;
	625	}
	626
21bc923a LP	627	if (pollfd[FD_SIGNAL].revents & POLLIN) {
	628	r = -EINTR;
	629	goto finish;
	630	}
7f4e0805 LP	631
7f4e0805 LP	632	if (pollfd[FD_SOCKET].revents != POLLIN) {
7f4e0805 LP	633	r = -EIO;
	634	goto finish;
	635	}
	636
	637	zero(iovec);
	638	iovec.iov_base = passphrase;
21bc923a	639	iovec.iov_len = sizeof(passphrase);
7f4e0805 LP	640
	641	zero(control);
	642	zero(msghdr);
	643	msghdr.msg_iov = &iovec;
	644	msghdr.msg_iovlen = 1;
	645	msghdr.msg_control = &control;
	646	msghdr.msg_controllen = sizeof(control);
	647
981e4cd3 LP	648	n = recvmsg(socket_fd, &msghdr, 0);
981e4cd3 LP	649	if (n < 0) {
3742095b	650	if (IN_SET(errno, EAGAIN, EINTR))
7f4e0805 LP	651	continue;
7f4e0805 LP	652
00843602	653	r = -errno;
7f4e0805 LP	654	goto finish;
	655	}
	656
1c8da044 LP	657	cmsg_close_all(&msghdr);
1c8da044 LP	658
7f4e0805	659	if (n <= 0) {
00843602	660	log_debug("Message too short");
7f4e0805 LP	661	continue;
	662	}
	663
	664	if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) \|\|
	665	control.cmsghdr.cmsg_level != SOL_SOCKET \|\|
	666	control.cmsghdr.cmsg_type != SCM_CREDENTIALS \|\|
	667	control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
00843602	668	log_debug("Received message without credentials. Ignoring.");
7f4e0805 LP	669	continue;
	670	}
	671
	672	ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
	673	if (ucred->uid != 0) {
00843602	674	log_debug("Got request from unprivileged user. Ignoring.");
7f4e0805 LP	675	continue;
	676	}
	677
	678	if (passphrase[0] == '+') {
e287086b	679	/* An empty message refers to the empty password */
8254a475 LP	680	if (n == 1)
	681	l = strv_new("", NULL);
	682	else
	683	l = strv_parse_nulstr(passphrase+1, n-1);
2d26d8e0	684	explicit_bzero(passphrase, n);
8254a475	685	if (!l) {
7f4e0805 LP	686	r = -ENOMEM;
	687	goto finish;
	688	}
	689
58629001	690	if (strv_isempty(l)) {
e287086b	691	l = strv_free(l);
00843602	692	log_debug("Invalid packet");
21bc923a LP	693	continue;
	694	}
	695
e287086b LP	696	break;
e287086b LP	697	}
21bc923a	698
e287086b	699	if (passphrase[0] == '-') {
7f4e0805 LP	700	r = -ECANCELED;
7f4e0805 LP	701	goto finish;
7f4e0805 LP	702	}
7f4e0805 LP	703
e287086b	704	log_debug("Invalid packet");
7f4e0805 LP	705	}
7f4e0805 LP	706
e287086b LP	707	if (keyname)
	708	(void) add_to_keyring_and_log(keyname, flags, l);
	709
ae2a15bc	710	*ret = TAKE_PTR(l);
7f4e0805 LP	711	r = 0;
	712
	713	finish:
981e4cd3	714	if (socket_name)
00843602	715	(void) unlink(socket_name);
7f4e0805	716
00843602	717	(void) unlink(temp);
7f4e0805 LP	718
7f4e0805 LP	719	if (final[0])
00843602	720	(void) unlink(final);
7f4e0805	721
f9b72cd8	722	assert_se(sigprocmask(SIG_SETMASK, &oldmask, NULL) == 0);
7f4e0805 LP	723	return r;
7f4e0805 LP	724	}
260ab287	725
00843602 LP	726	int ask_password_auto(
	727	const char *message,
	728	const char *icon,
	729	const char *id,
e287086b	730	const char *keyname,
00843602	731	usec_t until,
e287086b LP	732	AskPasswordFlags flags,
e287086b LP	733	char ***ret) {
00843602 LP	734
	735	int r;
	736
e287086b	737	assert(ret);
21bc923a	738
e287086b LP	739	if ((flags & ASK_PASSWORD_ACCEPT_CACHED) && keyname) {
	740	r = ask_password_keyring(keyname, flags, ret);
	741	if (r != -ENOKEY)
	742	return r;
	743	}
	744
	745	if (!(flags & ASK_PASSWORD_NO_TTY) && isatty(STDIN_FILENO)) {
21bc923a LP	746	char s = NULL, *l = NULL;
21bc923a LP	747
daa55720	748	r = ask_password_tty(-1, message, keyname, until, flags, NULL, &s);
981e4cd3	749	if (r < 0)
21bc923a LP	750	return r;
21bc923a LP	751
1602b008 LP	752	r = strv_push(&l, s);
	753	if (r < 0) {
	754	string_erase(s);
	755	free(s);
00843602	756	return -ENOMEM;
1602b008	757	}
21bc923a	758
e287086b	759	*ret = l;
00843602 LP	760	return 0;
	761	}
	762
e287086b LP	763	if (!(flags & ASK_PASSWORD_NO_AGENT))
	764	return ask_password_agent(message, icon, id, keyname, until, flags, ret);
	765
	766	return -EUNATCH;
260ab287	767	}