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

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  This file is part of systemd.

  Copyright 2010 Lennart Poettering
***/

#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 **name) {
        union sockaddr_union sa = {
                .un.sun_family = AF_UNIX,
        };
        _cleanup_close_ int fd = -1;
        static const int one = 1;
        char *c;
        int r;

        assert(name);

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

        snprintf(sa.un.sun_path, sizeof(sa.un.sun_path)-1, "/run/systemd/ask-password/sck.%" PRIx64, random_u64());

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

        if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
                return -errno;

        c = strdup(sa.un.sun_path);
        if (!c)
                return -ENOMEM;

        *name = c;

        r = fd;
        fd = -1;

        return r;
}

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+ */
7f4e0805 LP	2	/***
	3	This file is part of systemd.
	4
	5	Copyright 2010 Lennart Poettering
7f4e0805	6	***/
00843602	7
7f4e0805 LP	8	#include <errno.h>
7f4e0805 LP	9	#include <fcntl.h>
a8fbdf54 TA	10	#include <inttypes.h>
a8fbdf54 TA	11	#include <limits.h>
00843602	12	#include <poll.h>
a8fbdf54	13	#include <signal.h>
00843602	14	#include <stdbool.h>
7f4e0805	15	#include <stddef.h>
a8fbdf54 TA	16	#include <stdint.h>
	17	#include <stdio.h>
	18	#include <stdlib.h>
00843602 LP	19	#include <string.h>
00843602 LP	20	#include <sys/inotify.h>
7f4e0805	21	#include <sys/signalfd.h>
00843602	22	#include <sys/socket.h>
a8fbdf54 TA	23	#include <sys/stat.h>
	24	#include <sys/time.h>
	25	#include <sys/uio.h>
00843602 LP	26	#include <sys/un.h>
	27	#include <termios.h>
	28	#include <unistd.h>
7f4e0805	29
b5efdb8a	30	#include "alloc-util.h"
3ffd4af2 LP	31	#include "ask-password-api.h"
3ffd4af2 LP	32	#include "fd-util.h"
0d39fa9c	33	#include "fileio.h"
f97b34a6	34	#include "format-util.h"
c004493c	35	#include "io-util.h"
a8fbdf54 TA	36	#include "log.h"
a8fbdf54 TA	37	#include "macro.h"
e287086b	38	#include "missing.h"
49e942b2	39	#include "mkdir.h"
df0ff127	40	#include "process-util.h"
3df3e884	41	#include "random-util.h"
24882e06	42	#include "signal-util.h"
00843602	43	#include "socket-util.h"
07630cea	44	#include "string-util.h"
00843602 LP	45	#include "strv.h"
00843602 LP	46	#include "terminal-util.h"
a8fbdf54	47	#include "time-util.h"
affb60b1	48	#include "umask-util.h"
f3149d57	49	#include "utf8.h"
00843602	50	#include "util.h"
7f4e0805	51
e287086b LP	52	#define KEYRING_TIMEOUT_USEC ((5 * USEC_PER_MINUTE) / 2)
	53
	54	static int lookup_key(const char keyname, key_serial_t ret) {
	55	key_serial_t serial;
	56
	57	assert(keyname);
	58	assert(ret);
	59
	60	serial = request_key("user", keyname, NULL, 0);
	61	if (serial == -1)
9c4615fb	62	return negative_errno();
e287086b LP	63
	64	*ret = serial;
	65	return 0;
	66	}
	67
	68	static int retrieve_key(key_serial_t serial, char ***ret) {
	69	_cleanup_free_ char *p = NULL;
	70	long m = 100, n;
	71	char **l;
	72
	73	assert(ret);
	74
	75	for (;;) {
	76	p = new(char, m);
	77	if (!p)
	78	return -ENOMEM;
	79
	80	n = keyctl(KEYCTL_READ, (unsigned long) serial, (unsigned long) p, (unsigned long) m, 0);
	81	if (n < 0)
	82	return -errno;
	83
	84	if (n < m)
	85	break;
	86
2d26d8e0	87	explicit_bzero(p, n);
e287086b LP	88	free(p);
	89	m *= 2;
	90	}
	91
	92	l = strv_parse_nulstr(p, n);
	93	if (!l)
	94	return -ENOMEM;
	95
2d26d8e0	96	explicit_bzero(p, n);
1602b008	97
e287086b LP	98	*ret = l;
	99	return 0;
	100	}
	101
	102	static int add_to_keyring(const char keyname, AskPasswordFlags flags, char *passwords) {
ab84f5b9	103	_cleanup_strv_free_erase_ char **l = NULL;
e287086b LP	104	_cleanup_free_ char *p = NULL;
	105	key_serial_t serial;
	106	size_t n;
	107	int r;
	108
	109	assert(keyname);
	110	assert(passwords);
	111
	112	if (!(flags & ASK_PASSWORD_PUSH_CACHE))
	113	return 0;
	114
	115	r = lookup_key(keyname, &serial);
	116	if (r >= 0) {
	117	r = retrieve_key(serial, &l);
	118	if (r < 0)
	119	return r;
	120	} else if (r != -ENOKEY)
	121	return r;
	122
	123	r = strv_extend_strv(&l, passwords, true);
	124	if (r <= 0)
	125	return r;
	126
	127	r = strv_make_nulstr(l, &p, &n);
	128	if (r < 0)
	129	return r;
	130
b60df13b	131	serial = add_key("user", keyname, p, n, KEY_SPEC_USER_KEYRING);
2d26d8e0	132	explicit_bzero(p, n);
e287086b LP	133	if (serial == -1)
	134	return -errno;
	135
	136	if (keyctl(KEYCTL_SET_TIMEOUT,
	137	(unsigned long) serial,
	138	(unsigned long) DIV_ROUND_UP(KEYRING_TIMEOUT_USEC, USEC_PER_SEC), 0, 0) < 0)
	139	log_debug_errno(errno, "Failed to adjust timeout: %m");
	140
	141	log_debug("Added key to keyring as %" PRIi32 ".", serial);
	142
	143	return 1;
	144	}
	145
	146	static int add_to_keyring_and_log(const char keyname, AskPasswordFlags flags, char *passwords) {
	147	int r;
	148
	149	assert(keyname);
	150	assert(passwords);
	151
	152	r = add_to_keyring(keyname, flags, passwords);
	153	if (r < 0)
	154	return log_debug_errno(r, "Failed to add password to keyring: %m");
	155
	156	return 0;
	157	}
	158
	159	int ask_password_keyring(const char keyname, AskPasswordFlags flags, char **ret) {
	160
	161	key_serial_t serial;
	162	int r;
	163
	164	assert(keyname);
	165	assert(ret);
	166
	167	if (!(flags & ASK_PASSWORD_ACCEPT_CACHED))
	168	return -EUNATCH;
	169
	170	r = lookup_key(keyname, &serial);
	171	if (r == -ENOSYS) /* when retrieving the distinction doesn't matter */
	172	return -ENOKEY;
	173	if (r < 0)
	174	return r;
	175
	176	return retrieve_key(serial, ret);
	177	}
	178
58fc840b LP	179	static void backspace_chars(int ttyfd, size_t p) {
	180
	181	if (ttyfd < 0)
	182	return;
	183
	184	while (p > 0) {
	185	p--;
	186
	187	loop_write(ttyfd, "\b \b", 3, false);
	188	}
	189	}
	190
fd6ac62c LP	191	static void backspace_string(int ttyfd, const char *str) {
	192	size_t m;
	193
	194	assert(str);
	195
	196	if (ttyfd < 0)
	197	return;
	198
f95dbcc2	199	/* Backspaces through enough characters to entirely undo printing of the specified string. */
fd6ac62c LP	200
	201	m = utf8_n_codepoints(str);
	202	if (m == (size_t) -1)
	203	m = strlen(str); /* Not a valid UTF-8 string? If so, let's backspace the number of bytes output. Most
	204	* likely this happened because we are not in an UTF-8 locale, and in that case that
	205	* is the correct thing to do. And even if it's not, terminals tend to stop
	206	* backspacing at the leftmost column, hence backspacing too much should be mostly
	207	* OK. */
	208
	209	backspace_chars(ttyfd, m);
	210	}
	211
7f4e0805	212	int ask_password_tty(
daa55720	213	int ttyfd,
7f4e0805	214	const char *message,
e287086b	215	const char *keyname,
7f4e0805	216	usec_t until,
e287086b	217	AskPasswordFlags flags,
7f4e0805	218	const char *flag_file,
e287086b	219	char **ret) {
7f4e0805	220
088dcd8e LP	221	enum {
	222	POLL_TTY,
	223	POLL_INOTIFY,
	224	_POLL_MAX,
	225	};
	226
c2b32159	227	bool reset_tty = false, dirty = false, use_color = false;
daa55720	228	_cleanup_close_ int cttyfd = -1, notify = -1;
7f4e0805	229	struct termios old_termios, new_termios;
f3149d57	230	char passphrase[LINE_MAX + 1] = {}, *x;
088dcd8e	231	struct pollfd pollfd[_POLL_MAX];
f3149d57	232	size_t p = 0, codepoint = 0;
088dcd8e	233	int r;
7f4e0805	234
e287086b LP	235	assert(ret);
	236
	237	if (flags & ASK_PASSWORD_NO_TTY)
	238	return -EUNATCH;
	239
	240	if (!message)
	241	message = "Password:";
7f4e0805 LP	242
7f4e0805 LP	243	if (flag_file) {
981e4cd3	244	notify = inotify_init1(IN_CLOEXEC\|IN_NONBLOCK);
a497a296 LP	245	if (notify < 0)
	246	return -errno;
	247
	248	if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0)
	249	return -errno;
7f4e0805 LP	250	}
7f4e0805 LP	251
daa55720 LP	252	/* If the caller didn't specify a TTY, then use the controlling tty, if we can. */
	253	if (ttyfd < 0)
	254	ttyfd = cttyfd = open("/dev/tty", O_RDWR\|O_NOCTTY\|O_CLOEXEC);
7f4e0805	255
daa55720	256	if (ttyfd >= 0) {
a497a296 LP	257	if (tcgetattr(ttyfd, &old_termios) < 0)
a497a296 LP	258	return -errno;
7f4e0805	259
c2b32159 LP	260	if (flags & ASK_PASSWORD_CONSOLE_COLOR)
	261	use_color = dev_console_colors_enabled();
	262	else
	263	use_color = colors_enabled();
	264
	265	if (use_color)
ac7a9674 LP	266	(void) loop_write(ttyfd, ANSI_HIGHLIGHT, STRLEN(ANSI_HIGHLIGHT), false);
	267
	268	(void) loop_write(ttyfd, message, strlen(message), false);
	269	(void) loop_write(ttyfd, " ", 1, false);
	270
c2b32159	271	if (use_color)
ac7a9674	272	(void) loop_write(ttyfd, ANSI_NORMAL, STRLEN(ANSI_NORMAL), false);
7f4e0805 LP	273
	274	new_termios = old_termios;
	275	new_termios.c_lflag &= ~(ICANON\|ECHO);
	276	new_termios.c_cc[VMIN] = 1;
	277	new_termios.c_cc[VTIME] = 0;
	278
	279	if (tcsetattr(ttyfd, TCSADRAIN, &new_termios) < 0) {
	280	r = -errno;
	281	goto finish;
	282	}
	283
	284	reset_tty = true;
	285	}
	286
70dee475 LP	287	pollfd[POLL_TTY] = (struct pollfd) {
	288	.fd = ttyfd >= 0 ? ttyfd : STDIN_FILENO,
	289	.events = POLLIN,
	290	};
	291	pollfd[POLL_INOTIFY] = (struct pollfd) {
	292	.fd = notify,
	293	.events = POLLIN,
	294	};
7f4e0805 LP	295
7f4e0805 LP	296	for (;;) {
7f4e0805 LP	297	int sleep_for = -1, k;
7f4e0805 LP	298	ssize_t n;
fd6ac62c	299	char c;
7f4e0805 LP	300
	301	if (until > 0) {
	302	usec_t y;
	303
	304	y = now(CLOCK_MONOTONIC);
	305
	306	if (y > until) {
7ded2e28	307	r = -ETIME;
7f4e0805 LP	308	goto finish;
	309	}
	310
c9eb4a00	311	sleep_for = (int) DIV_ROUND_UP(until - y, USEC_PER_MSEC);
7f4e0805 LP	312	}
	313
	314	if (flag_file)
	315	if (access(flag_file, F_OK) < 0) {
	316	r = -errno;
	317	goto finish;
	318	}
	319
e287086b	320	k = poll(pollfd, notify >= 0 ? 2 : 1, sleep_for);
981e4cd3	321	if (k < 0) {
7f4e0805 LP	322	if (errno == EINTR)
	323	continue;
	324
	325	r = -errno;
	326	goto finish;
	327	} else if (k == 0) {
ccc80078	328	r = -ETIME;
7f4e0805 LP	329	goto finish;
	330	}
	331
e287086b	332	if (notify >= 0 && pollfd[POLL_INOTIFY].revents != 0)
665dfe93	333	(void) flush_fd(notify);
7f4e0805 LP	334
	335	if (pollfd[POLL_TTY].revents == 0)
	336	continue;
	337
981e4cd3 LP	338	n = read(ttyfd >= 0 ? ttyfd : STDIN_FILENO, &c, 1);
981e4cd3 LP	339	if (n < 0) {
3742095b	340	if (IN_SET(errno, EINTR, EAGAIN))
7f4e0805 LP	341	continue;
	342
	343	r = -errno;
	344	goto finish;
	345
fd6ac62c	346	}
7f4e0805	347
fd6ac62c LP	348	/* We treat EOF, newline and NUL byte all as valid end markers */
fd6ac62c LP	349	if (n == 0 \|\| c == '\n' \|\| c == 0)
7f4e0805	350	break;
fd6ac62c LP	351
fd6ac62c LP	352	if (c == 21) { /* C-u */
7f4e0805	353
e287086b	354	if (!(flags & ASK_PASSWORD_SILENT))
fd6ac62c LP	355	backspace_string(ttyfd, passphrase);
	356
	357	explicit_bzero(passphrase, sizeof(passphrase));
	358	p = codepoint = 0;
7f4e0805	359
4c701096	360	} else if (IN_SET(c, '\b', 127)) {
58fc840b LP	361
58fc840b LP	362	if (p > 0) {
fd6ac62c	363	size_t q;
58fc840b	364
e287086b	365	if (!(flags & ASK_PASSWORD_SILENT))
58fc840b LP	366	backspace_chars(ttyfd, 1);
58fc840b LP	367
fd6ac62c LP	368	/* Remove a full UTF-8 codepoint from the end. For that, figure out where the last one
	369	* begins */
	370	q = 0;
	371	for (;;) {
	372	size_t z;
	373
	374	z = utf8_encoded_valid_unichar(passphrase + q);
	375	if (z == 0) {
	376	q = (size_t) -1; /* Invalid UTF8! */
	377	break;
	378	}
	379
	380	if (q + z >= p) /* This one brings us over the edge */
	381	break;
	382
	383	q += z;
	384	}
	385
	386	p = codepoint = q == (size_t) -1 ? p - 1 : q;
	387	explicit_bzero(passphrase + p, sizeof(passphrase) - p);
	388
e287086b	389	} else if (!dirty && !(flags & ASK_PASSWORD_SILENT)) {
441dfe09	390
e287086b	391	flags \|= ASK_PASSWORD_SILENT;
441dfe09	392
fd6ac62c LP	393	/* There are two ways to enter silent mode. Either by pressing backspace as first key
	394	* (and only as first key), or ... */
	395
441dfe09	396	if (ttyfd >= 0)
ac7a9674	397	(void) loop_write(ttyfd, "(no echo) ", 10, false);
441dfe09	398
58fc840b	399	} else if (ttyfd >= 0)
ac7a9674	400	(void) loop_write(ttyfd, "\a", 1, false);
7f4e0805	401
e287086b	402	} else if (c == '\t' && !(flags & ASK_PASSWORD_SILENT)) {
58fc840b	403
fd6ac62c	404	backspace_string(ttyfd, passphrase);
e287086b	405	flags \|= ASK_PASSWORD_SILENT;
58fc840b	406
441dfe09 LP	407	/* ... or by pressing TAB at any time. */
441dfe09 LP	408
58fc840b	409	if (ttyfd >= 0)
ac7a9674	410	(void) loop_write(ttyfd, "(no echo) ", 10, false);
036eeac5	411
fd6ac62c LP	412	} else if (p >= sizeof(passphrase)-1) {
	413
	414	/* Reached the size limit */
	415	if (ttyfd >= 0)
	416	(void) loop_write(ttyfd, "\a", 1, false);
	417
	418	} else {
7f4e0805 LP	419	passphrase[p++] = c;
7f4e0805 LP	420
f3149d57	421	if (!(flags & ASK_PASSWORD_SILENT) && ttyfd >= 0) {
fd6ac62c	422	/* Check if we got a complete UTF-8 character now. If so, let's output one ''. /
f3149d57 ZJS	423	n = utf8_encoded_valid_unichar(passphrase + codepoint);
	424	if (n >= 0) {
	425	codepoint = p;
ac7a9674	426	(void) loop_write(ttyfd, (flags & ASK_PASSWORD_ECHO) ? &c : "*", 1, false);
f3149d57 ZJS	427	}
f3149d57 ZJS	428	}
441dfe09 LP	429
441dfe09 LP	430	dirty = true;
7f4e0805	431	}
1602b008	432
fd6ac62c	433	/* Let's forget this char, just to not keep needlessly copies of key material around */
1602b008	434	c = 'x';
7f4e0805 LP	435	}
7f4e0805 LP	436
981e4cd3	437	x = strndup(passphrase, p);
fd6ac62c	438	explicit_bzero(passphrase, sizeof(passphrase));
981e4cd3	439	if (!x) {
7f4e0805 LP	440	r = -ENOMEM;
	441	goto finish;
	442	}
	443
e287086b LP	444	if (keyname)
	445	(void) add_to_keyring_and_log(keyname, flags, STRV_MAKE(x));
	446
	447	*ret = x;
7f4e0805 LP	448	r = 0;
	449
	450	finish:
981e4cd3	451	if (ttyfd >= 0 && reset_tty) {
ac7a9674 LP	452	(void) loop_write(ttyfd, "\n", 1, false);
ac7a9674 LP	453	(void) tcsetattr(ttyfd, TCSADRAIN, &old_termios);
7f4e0805 LP	454	}
	455
	456	return r;
	457	}
	458
	459	static int create_socket(char **name) {
00843602	460	union sockaddr_union sa = {
b92bea5d ZJS	461	.un.sun_family = AF_UNIX,
b92bea5d ZJS	462	};
00843602 LP	463	_cleanup_close_ int fd = -1;
00843602 LP	464	static const int one = 1;
7f4e0805	465	char *c;
00843602	466	int r;
7f4e0805 LP	467
	468	assert(name);
	469
e62d8c39	470	fd = socket(AF_UNIX, SOCK_DGRAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0);
4a62c710	471	if (fd < 0)
00843602	472	return -errno;
7f4e0805	473
9bf3b535	474	snprintf(sa.un.sun_path, sizeof(sa.un.sun_path)-1, "/run/systemd/ask-password/sck.%" PRIx64, random_u64());
7f4e0805	475
5c0d398d	476	RUN_WITH_UMASK(0177) {
fc2fffe7	477	if (bind(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0)
00843602	478	return -errno;
5c0d398d	479	}
1d6702e8	480
00843602 LP	481	if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0)
00843602 LP	482	return -errno;
7f4e0805	483
e62d8c39	484	c = strdup(sa.un.sun_path);
00843602 LP	485	if (!c)
00843602 LP	486	return -ENOMEM;
7f4e0805 LP	487
7f4e0805 LP	488	*name = c;
7f4e0805	489
00843602 LP	490	r = fd;
00843602 LP	491	fd = -1;
7f4e0805 LP	492
	493	return r;
	494	}
	495
7f4e0805 LP	496	int ask_password_agent(
	497	const char *message,
	498	const char *icon,
9fa1de96	499	const char *id,
e287086b	500	const char *keyname,
7f4e0805	501	usec_t until,
e287086b LP	502	AskPasswordFlags flags,
e287086b LP	503	char ***ret) {
7f4e0805 LP	504
	505	enum {
	506	FD_SOCKET,
	507	FD_SIGNAL,
	508	_FD_MAX
	509	};
	510
e287086b	511	_cleanup_close_ int socket_fd = -1, signal_fd = -1, fd = -1;
2b583ce6	512	char temp[] = "/run/systemd/ask-password/tmp.XXXXXX";
7f4e0805	513	char final[sizeof(temp)] = "";
981e4cd3	514	_cleanup_free_ char *socket_name = NULL;
e287086b LP	515	_cleanup_strv_free_ char **l = NULL;
e287086b LP	516	_cleanup_fclose_ FILE *f = NULL;
7f4e0805	517	struct pollfd pollfd[_FD_MAX];
e287086b	518	sigset_t mask, oldmask;
981e4cd3	519	int r;
7f4e0805	520
e287086b	521	assert(ret);
21bc923a	522
e287086b LP	523	if (flags & ASK_PASSWORD_NO_AGENT)
e287086b LP	524	return -EUNATCH;
00843602	525
72c0a2c2 LP	526	assert_se(sigemptyset(&mask) >= 0);
	527	assert_se(sigset_add_many(&mask, SIGINT, SIGTERM, -1) >= 0);
	528	assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) >= 0);
f9b72cd8	529
00843602	530	(void) mkdir_p_label("/run/systemd/ask-password", 0755);
7f4e0805	531
646853bd	532	fd = mkostemp_safe(temp);
1d6702e8	533	if (fd < 0) {
709f6e46	534	r = fd;
7f4e0805 LP	535	goto finish;
	536	}
	537
00843602	538	(void) fchmod(fd, 0644);
7f4e0805	539
981e4cd3 LP	540	f = fdopen(fd, "w");
981e4cd3 LP	541	if (!f) {
00843602	542	r = -errno;
7f4e0805 LP	543	goto finish;
	544	}
	545
	546	fd = -1;
	547
981e4cd3 LP	548	signal_fd = signalfd(-1, &mask, SFD_NONBLOCK\|SFD_CLOEXEC);
981e4cd3 LP	549	if (signal_fd < 0) {
00843602	550	r = -errno;
7f4e0805 LP	551	goto finish;
	552	}
	553
981e4cd3 LP	554	socket_fd = create_socket(&socket_name);
981e4cd3 LP	555	if (socket_fd < 0) {
7f4e0805 LP	556	r = socket_fd;
	557	goto finish;
	558	}
	559
	560	fprintf(f,
	561	"[Ask]\n"
de0671ee	562	"PID="PID_FMT"\n"
7f4e0805	563	"Socket=%s\n"
21bc923a	564	"AcceptCached=%i\n"
64845bdc	565	"Echo=%i\n"
de0671ee	566	"NotAfter="USEC_FMT"\n",
df0ff127	567	getpid_cached(),
7f4e0805	568	socket_name,
e287086b LP	569	(flags & ASK_PASSWORD_ACCEPT_CACHED) ? 1 : 0,
e287086b LP	570	(flags & ASK_PASSWORD_ECHO) ? 1 : 0,
de0671ee	571	until);
7f4e0805 LP	572
	573	if (message)
	574	fprintf(f, "Message=%s\n", message);
	575
	576	if (icon)
	577	fprintf(f, "Icon=%s\n", icon);
	578
9fa1de96 DH	579	if (id)
	580	fprintf(f, "Id=%s\n", id);
	581
dacd6cee	582	r = fflush_and_check(f);
00843602	583	if (r < 0)
7f4e0805	584	goto finish;
7f4e0805 LP	585
	586	memcpy(final, temp, sizeof(temp));
	587
	588	final[sizeof(final)-11] = 'a';
	589	final[sizeof(final)-10] = 's';
	590	final[sizeof(final)-9] = 'k';
	591
	592	if (rename(temp, final) < 0) {
00843602	593	r = -errno;
7f4e0805 LP	594	goto finish;
	595	}
	596
	597	zero(pollfd);
	598	pollfd[FD_SOCKET].fd = socket_fd;
	599	pollfd[FD_SOCKET].events = POLLIN;
	600	pollfd[FD_SIGNAL].fd = signal_fd;
	601	pollfd[FD_SIGNAL].events = POLLIN;
	602
	603	for (;;) {
	604	char passphrase[LINE_MAX+1];
	605	struct msghdr msghdr;
	606	struct iovec iovec;
	607	struct ucred *ucred;
	608	union {
	609	struct cmsghdr cmsghdr;
	610	uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
	611	} control;
	612	ssize_t n;
	613	int k;
	614	usec_t t;
	615
	616	t = now(CLOCK_MONOTONIC);
	617
7dcda352	618	if (until > 0 && until <= t) {
7f4e0805 LP	619	r = -ETIME;
	620	goto finish;
	621	}
	622
981e4cd3 LP	623	k = poll(pollfd, _FD_MAX, until > 0 ? (int) ((until-t)/USEC_PER_MSEC) : -1);
981e4cd3 LP	624	if (k < 0) {
7f4e0805 LP	625	if (errno == EINTR)
	626	continue;
	627
00843602	628	r = -errno;
7f4e0805 LP	629	goto finish;
	630	}
	631
	632	if (k <= 0) {
7f4e0805 LP	633	r = -ETIME;
	634	goto finish;
	635	}
	636
21bc923a LP	637	if (pollfd[FD_SIGNAL].revents & POLLIN) {
	638	r = -EINTR;
	639	goto finish;
	640	}
7f4e0805 LP	641
7f4e0805 LP	642	if (pollfd[FD_SOCKET].revents != POLLIN) {
7f4e0805 LP	643	r = -EIO;
	644	goto finish;
	645	}
	646
	647	zero(iovec);
	648	iovec.iov_base = passphrase;
21bc923a	649	iovec.iov_len = sizeof(passphrase);
7f4e0805 LP	650
	651	zero(control);
	652	zero(msghdr);
	653	msghdr.msg_iov = &iovec;
	654	msghdr.msg_iovlen = 1;
	655	msghdr.msg_control = &control;
	656	msghdr.msg_controllen = sizeof(control);
	657
981e4cd3 LP	658	n = recvmsg(socket_fd, &msghdr, 0);
981e4cd3 LP	659	if (n < 0) {
3742095b	660	if (IN_SET(errno, EAGAIN, EINTR))
7f4e0805 LP	661	continue;
7f4e0805 LP	662
00843602	663	r = -errno;
7f4e0805 LP	664	goto finish;
	665	}
	666
1c8da044 LP	667	cmsg_close_all(&msghdr);
1c8da044 LP	668
7f4e0805	669	if (n <= 0) {
00843602	670	log_debug("Message too short");
7f4e0805 LP	671	continue;
	672	}
	673
	674	if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) \|\|
	675	control.cmsghdr.cmsg_level != SOL_SOCKET \|\|
	676	control.cmsghdr.cmsg_type != SCM_CREDENTIALS \|\|
	677	control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
00843602	678	log_debug("Received message without credentials. Ignoring.");
7f4e0805 LP	679	continue;
	680	}
	681
	682	ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
	683	if (ucred->uid != 0) {
00843602	684	log_debug("Got request from unprivileged user. Ignoring.");
7f4e0805 LP	685	continue;
	686	}
	687
	688	if (passphrase[0] == '+') {
e287086b	689	/* An empty message refers to the empty password */
8254a475 LP	690	if (n == 1)
	691	l = strv_new("", NULL);
	692	else
	693	l = strv_parse_nulstr(passphrase+1, n-1);
2d26d8e0	694	explicit_bzero(passphrase, n);
8254a475	695	if (!l) {
7f4e0805 LP	696	r = -ENOMEM;
	697	goto finish;
	698	}
	699
58629001	700	if (strv_isempty(l)) {
e287086b	701	l = strv_free(l);
00843602	702	log_debug("Invalid packet");
21bc923a LP	703	continue;
	704	}
	705
e287086b LP	706	break;
e287086b LP	707	}
21bc923a	708
e287086b	709	if (passphrase[0] == '-') {
7f4e0805 LP	710	r = -ECANCELED;
7f4e0805 LP	711	goto finish;
7f4e0805 LP	712	}
7f4e0805 LP	713
e287086b	714	log_debug("Invalid packet");
7f4e0805 LP	715	}
7f4e0805 LP	716
e287086b LP	717	if (keyname)
	718	(void) add_to_keyring_and_log(keyname, flags, l);
	719
ae2a15bc	720	*ret = TAKE_PTR(l);
7f4e0805 LP	721	r = 0;
	722
	723	finish:
981e4cd3	724	if (socket_name)
00843602	725	(void) unlink(socket_name);
7f4e0805	726
00843602	727	(void) unlink(temp);
7f4e0805 LP	728
7f4e0805 LP	729	if (final[0])
00843602	730	(void) unlink(final);
7f4e0805	731
f9b72cd8	732	assert_se(sigprocmask(SIG_SETMASK, &oldmask, NULL) == 0);
7f4e0805 LP	733	return r;
7f4e0805 LP	734	}
260ab287	735
00843602 LP	736	int ask_password_auto(
	737	const char *message,
	738	const char *icon,
	739	const char *id,
e287086b	740	const char *keyname,
00843602	741	usec_t until,
e287086b LP	742	AskPasswordFlags flags,
e287086b LP	743	char ***ret) {
00843602 LP	744
	745	int r;
	746
e287086b	747	assert(ret);
21bc923a	748
e287086b LP	749	if ((flags & ASK_PASSWORD_ACCEPT_CACHED) && keyname) {
	750	r = ask_password_keyring(keyname, flags, ret);
	751	if (r != -ENOKEY)
	752	return r;
	753	}
	754
	755	if (!(flags & ASK_PASSWORD_NO_TTY) && isatty(STDIN_FILENO)) {
21bc923a LP	756	char s = NULL, *l = NULL;
21bc923a LP	757
daa55720	758	r = ask_password_tty(-1, message, keyname, until, flags, NULL, &s);
981e4cd3	759	if (r < 0)
21bc923a LP	760	return r;
21bc923a LP	761
1602b008 LP	762	r = strv_push(&l, s);
	763	if (r < 0) {
	764	string_erase(s);
	765	free(s);
00843602	766	return -ENOMEM;
1602b008	767	}
21bc923a	768
e287086b	769	*ret = l;
00843602 LP	770	return 0;
	771	}
	772
e287086b LP	773	if (!(flags & ASK_PASSWORD_NO_AGENT))
	774	return ask_password_agent(message, icon, id, keyname, until, flags, ret);
	775
	776	return -EUNATCH;
260ab287	777	}