chiark / gitweb /
cryptsetup: hook up tool with ask-password
authorLennart Poettering <lennart@poettering.net>
Thu, 11 Nov 2010 23:39:17 +0000 (00:39 +0100)
committerLennart Poettering <lennart@poettering.net>
Thu, 11 Nov 2010 23:40:27 +0000 (00:40 +0100)
Makefile.am
configure.ac
src/ask-password-api.c [new file with mode: 0644]
src/ask-password-api.h [new file with mode: 0644]
src/ask-password.c
src/cryptsetup-generator.c
src/cryptsetup.c
src/manager.c
src/tty-ask-password-agent.c
src/util.c
src/util.h

index ab8146d..8c92256 100644 (file)
@@ -118,12 +118,16 @@ rootlibexec_PROGRAMS = \
        systemd-user-sessions \
        systemd-fsck \
        systemd-quotacheck \
-       systemd-cryptsetup \
        systemd-timestamp \
        systemd-ac-power
 
+if HAVE_LIBCRYPTSETUP
+rootlibexec_PROGRAMS += \
+       systemd-cryptsetup
+
 systemgenerator_PROGRAMS = \
        systemd-cryptsetup-generator
+endif
 
 noinst_PROGRAMS = \
        test-engine \
@@ -467,7 +471,8 @@ EXTRA_DIST += \
        src/build.h \
        src/shutdownd.h \
        src/umount.h \
-       src/readahead-common.h
+       src/readahead-common.h \
+       src/ask-password-api.h
 
 MANPAGES = \
        man/systemd.1 \
@@ -746,12 +751,15 @@ systemd_ac_power_LDADD = \
        $(UDEV_LIBS)
 
 systemd_cryptsetup_SOURCES = \
-       src/cryptsetup.c
+       src/cryptsetup.c \
+       src/ask-password-api.c
 
 systemd_cryptsetup_CFLAGS = \
+       $(LIBCRYPTSETUP_CFLAGS) \
        $(AM_CFLAGS)
 
 systemd_cryptsetup_LDADD = \
+       $(LIBCRYPTSETUP_LIBS) \
        libsystemd-basic.la
 
 systemd_cryptsetup_generator_SOURCES = \
@@ -844,7 +852,8 @@ systemd_notify_LDADD = \
        libsystemd-basic.la
 
 systemd_ask_password_SOURCES = \
-       src/ask-password.c
+       src/ask-password.c \
+       src/ask-password-api.c
 
 systemd_ask_password_LDADD = \
        libsystemd-basic.la
@@ -940,6 +949,7 @@ systemd_gnome_ask_password_agent_LDADD = \
 
 systemd_tty_ask_password_agent_SOURCES = \
        src/tty-ask-password-agent.c \
+       src/ask-password-api.c \
        src/utmp-wtmp.c
 
 systemd_tty_ask_password_agent_LDADD = \
index a9f9e1a..12cdb0c 100644 (file)
@@ -229,6 +229,19 @@ else
 fi
 AC_SUBST(AUDIT_LIBS)
 
+have_libcryptsetup=no
+AC_ARG_ENABLE(libcryptsetup, AS_HELP_STRING([--disable-libcryptsetup], [disable libcryptsetup tools]))
+if test "x$enable_libcryptsetup" != "xno"; then
+        PKG_CHECK_MODULES(LIBCRYPTSETUP, [ libcryptsetup ],
+                [AC_DEFINE(HAVE_LIBCRYPTSETUP, 1, [Define if libcryptsetup is available]) have_libcryptsetup=yes], have_libcryptsetup=no)
+        AC_SUBST(LIBCRYPTSETUP_CFLAGS)
+        AC_SUBST(LIBCRYPTSETUP_LIBS)
+        if test "x$have_libcryptsetup" = xno -a "x$enable_libcryptsetup" = xyes; then
+             AC_MSG_ERROR([*** libcryptsetup support requested but libraries not found])
+        fi
+fi
+AM_CONDITIONAL(HAVE_LIBCRYPTSETUP, [test "$have_libcryptsetup" = "yes"])
+
 have_gtk=no
 AC_ARG_ENABLE(gtk, AS_HELP_STRING([--disable-gtk], [disable GTK tools]))
 if test "x$enable_gtk" != "xno"; then
@@ -444,6 +457,7 @@ echo "
         SysV rc?.d directories:  ${SYSTEM_SYSVRCND_PATH}
         Syslog service:          ${SPECIAL_SYSLOG_SERVICE}
         Gtk:                     ${have_gtk}
+        libcryptsetup:           ${have_libcryptsetup}
         tcpwrap:                 ${have_tcpwrap}
         PAM:                     ${have_pam}
         AUDIT:                   ${have_audit}
diff --git a/src/ask-password-api.c b/src/ask-password-api.c
new file mode 100644 (file)
index 0000000..2441df3
--- /dev/null
@@ -0,0 +1,482 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <termios.h>
+#include <unistd.h>
+#include <sys/poll.h>
+#include <sys/inotify.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <string.h>
+#include <sys/un.h>
+#include <stddef.h>
+#include <sys/signalfd.h>
+
+#include "util.h"
+
+#include "ask-password-api.h"
+
+int ask_password_tty(
+                const char *message,
+                usec_t until,
+                const char *flag_file,
+                char **_passphrase) {
+
+        struct termios old_termios, new_termios;
+        char passphrase[LINE_MAX];
+        size_t p = 0;
+        int r, ttyfd = -1, notify = -1;
+        struct pollfd pollfd[2];
+        bool reset_tty = false;
+        enum {
+                POLL_TTY,
+                POLL_INOTIFY
+        };
+
+        assert(message);
+        assert(_passphrase);
+
+        if (flag_file) {
+                if ((notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) {
+                        r = -errno;
+                        goto finish;
+                }
+
+                if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0) {
+                        r = -errno;
+                        goto finish;
+                }
+        }
+
+        if ((ttyfd = open("/dev/tty", O_RDWR|O_NOCTTY|O_CLOEXEC)) >= 0) {
+
+                if (tcgetattr(ttyfd, &old_termios) < 0) {
+                        r = -errno;
+                        goto finish;
+                }
+
+                loop_write(ttyfd, "\x1B[1m", 4, false);
+                loop_write(ttyfd, message, strlen(message), false);
+                loop_write(ttyfd, ": ", 2, false);
+                loop_write(ttyfd, "\x1B[0m", 4, 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;
+        }
+
+        zero(pollfd);
+
+        pollfd[POLL_TTY].fd = ttyfd >= 0 ? ttyfd : STDIN_FILENO;
+        pollfd[POLL_TTY].events = POLLIN;
+        pollfd[POLL_INOTIFY].fd = notify;
+        pollfd[POLL_INOTIFY].events = POLLIN;
+
+        for (;;) {
+                char c;
+                int sleep_for = -1, k;
+                ssize_t n;
+
+                if (until > 0) {
+                        usec_t y;
+
+                        y = now(CLOCK_MONOTONIC);
+
+                        if (y > until) {
+                                r = -ETIMEDOUT;
+                                goto finish;
+                        }
+
+                        sleep_for = (int) ((until - y) / USEC_PER_MSEC);
+                }
+
+                if (flag_file)
+                        if (access(flag_file, F_OK) < 0) {
+                                r = -errno;
+                                goto finish;
+                        }
+
+                if ((k = poll(pollfd, notify > 0 ? 2 : 1, sleep_for)) < 0) {
+
+                        if (errno == EINTR)
+                                continue;
+
+                        r = -errno;
+                        goto finish;
+                } else if (k == 0) {
+                        r = -ETIMEDOUT;
+                        goto finish;
+                }
+
+                if (notify > 0 && pollfd[POLL_INOTIFY].revents != 0)
+                        flush_fd(notify);
+
+                if (pollfd[POLL_TTY].revents == 0)
+                        continue;
+
+                if ((n = read(ttyfd >= 0 ? ttyfd : STDIN_FILENO, &c, 1)) < 0) {
+
+                        if (errno == EINTR || errno == EAGAIN)
+                                continue;
+
+                        r = -errno;
+                        goto finish;
+
+                } else if (n == 0)
+                        break;
+
+                if (c == '\n')
+                        break;
+                else if (c == 21) {
+
+                        while (p > 0) {
+                                p--;
+
+                                if (ttyfd >= 0)
+                                        loop_write(ttyfd, "\b \b", 3, false);
+                        }
+
+                } else if (c == '\b' || c == 127) {
+                        if (p > 0) {
+                                p--;
+
+                                if (ttyfd >= 0)
+                                        loop_write(ttyfd, "\b \b", 3, false);
+                        }
+                } else {
+                        passphrase[p++] = c;
+
+                        if (ttyfd >= 0)
+                                loop_write(ttyfd, "*", 1, false);
+                }
+        }
+
+        if (ttyfd >= 0)
+                loop_write(ttyfd, "\n", 1, false);
+
+        passphrase[p] = 0;
+
+        if (!(*_passphrase = strdup(passphrase))) {
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        r = 0;
+
+finish:
+        if (notify >= 0)
+                close_nointr_nofail(notify);
+
+        if (ttyfd >= 0) {
+                if (reset_tty)
+                        tcsetattr(ttyfd, TCSADRAIN, &old_termios);
+
+                close_nointr_nofail(ttyfd);
+        }
+
+        return r;
+}
+
+static int create_socket(char **name) {
+        int fd;
+        union {
+                struct sockaddr sa;
+                struct sockaddr_un un;
+        } sa;
+        int one = 1, r;
+        char *c;
+
+        assert(name);
+
+        if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
+                log_error("socket() failed: %m");
+                return -errno;
+        }
+
+        zero(sa);
+        sa.un.sun_family = AF_UNIX;
+        snprintf(sa.un.sun_path, sizeof(sa.un.sun_path)-1, "/dev/.systemd/ask-password/sck.%llu", random_ull());
+
+        if (bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
+                r = -errno;
+                log_error("bind() failed: %m");
+                goto fail;
+        }
+
+        if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) {
+                r = -errno;
+                log_error("SO_PASSCRED failed: %m");
+                goto fail;
+        }
+
+        if (!(c = strdup(sa.un.sun_path))) {
+                r = -ENOMEM;
+                log_error("Out of memory");
+                goto fail;
+        }
+
+        *name = c;
+        return fd;
+
+fail:
+        close_nointr_nofail(fd);
+
+        return r;
+}
+
+
+int ask_password_agent(
+                const char *message,
+                const char *icon,
+                usec_t until,
+                char **_passphrase) {
+
+        enum {
+                FD_SOCKET,
+                FD_SIGNAL,
+                _FD_MAX
+        };
+
+        char temp[] = "/dev/.systemd/ask-password/tmp.XXXXXX";
+        char final[sizeof(temp)] = "";
+        int fd = -1, r;
+        FILE *f = NULL;
+        char *socket_name = NULL;
+        int socket_fd = -1, signal_fd = -1;
+        sigset_t mask;
+        struct pollfd pollfd[_FD_MAX];
+
+        mkdir_p("/dev/.systemd/ask-password", 0755);
+
+        if ((fd = mkostemp(temp, O_CLOEXEC|O_CREAT|O_WRONLY)) < 0) {
+                log_error("Failed to create password file: %m");
+                r = -errno;
+                goto finish;
+        }
+
+        fchmod(fd, 0644);
+
+        if (!(f = fdopen(fd, "w"))) {
+                log_error("Failed to allocate FILE: %m");
+                r = -errno;
+                goto finish;
+        }
+
+        fd = -1;
+
+        assert_se(sigemptyset(&mask) == 0);
+        sigset_add_many(&mask, SIGINT, SIGTERM, -1);
+        assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
+
+        if ((signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0) {
+                log_error("signalfd(): %m");
+                r = -errno;
+                goto finish;
+        }
+
+        if ((socket_fd = create_socket(&socket_name)) < 0) {
+                r = socket_fd;
+                goto finish;
+        }
+
+        fprintf(f,
+                "[Ask]\n"
+                "PID=%lu\n"
+                "Socket=%s\n"
+                "NotAfter=%llu\n",
+                (unsigned long) getpid(),
+                socket_name,
+                (unsigned long long) until);
+
+        if (message)
+                fprintf(f, "Message=%s\n", message);
+
+        if (icon)
+                fprintf(f, "Icon=%s\n", icon);
+
+        fflush(f);
+
+        if (ferror(f)) {
+                log_error("Failed to write query file: %m");
+                r = -errno;
+                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) {
+                log_error("Failed to rename query file: %m");
+                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 <= t) {
+                        log_notice("Timed out");
+                        r = -ETIME;
+                        goto finish;
+                }
+
+                if ((k = poll(pollfd, _FD_MAX, until-t/USEC_PER_MSEC)) < 0) {
+
+                        if (errno == EINTR)
+                                continue;
+
+                        log_error("poll() failed: %m");
+                        r = -errno;
+                        goto finish;
+                }
+
+                if (k <= 0) {
+                        log_notice("Timed out");
+                        r = -ETIME;
+                        goto finish;
+                }
+
+                if (pollfd[FD_SIGNAL].revents & POLLIN)
+                        break;
+
+                if (pollfd[FD_SOCKET].revents != POLLIN) {
+                        log_error("Unexpected poll() event.");
+                        r = -EIO;
+                        goto finish;
+                }
+
+                zero(iovec);
+                iovec.iov_base = passphrase;
+                iovec.iov_len = sizeof(passphrase)-1;
+
+                zero(control);
+                zero(msghdr);
+                msghdr.msg_iov = &iovec;
+                msghdr.msg_iovlen = 1;
+                msghdr.msg_control = &control;
+                msghdr.msg_controllen = sizeof(control);
+
+                if ((n = recvmsg(socket_fd, &msghdr, 0)) < 0) {
+
+                        if (errno == EAGAIN ||
+                            errno == EINTR)
+                                continue;
+
+                        log_error("recvmsg() failed: %m");
+                        r = -errno;
+                        goto finish;
+                }
+
+                if (n <= 0) {
+                        log_error("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_warning("Received message without credentials. Ignoring.");
+                        continue;
+                }
+
+                ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
+                if (ucred->uid != 0) {
+                        log_warning("Got request from unprivileged user. Ignoring.");
+                        continue;
+                }
+
+                if (passphrase[0] == '+') {
+                        passphrase[n] = 0;
+
+                        if (!(*_passphrase = strdup(passphrase+1))) {
+                                r = -ENOMEM;
+                                goto finish;
+                        }
+
+                } else if (passphrase[0] == '-') {
+                        r = -ECANCELED;
+                        goto finish;
+                } else {
+                        log_error("Invalid packet");
+                        continue;
+                }
+
+                break;
+        }
+
+        r = 0;
+
+finish:
+        if (fd >= 0)
+                close_nointr_nofail(fd);
+
+        if (socket_name) {
+                unlink(socket_name);
+                free(socket_name);
+        }
+
+        if (socket_fd >= 0)
+                close_nointr_nofail(socket_fd);
+
+        if (signal_fd >= 0)
+                close_nointr_nofail(signal_fd);
+
+        if (f)
+                fclose(f);
+
+        unlink(temp);
+
+        if (final[0])
+                unlink(final);
+
+        return r;
+}
diff --git a/src/ask-password-api.h b/src/ask-password-api.h
new file mode 100644 (file)
index 0000000..8ef1aa6
--- /dev/null
@@ -0,0 +1,31 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef fooaskpasswordapihfoo
+#define fooaskpasswordapihfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "util.h"
+
+int ask_password_tty(const char *message, usec_t until, const char *flag_file, char **_passphrase);
+
+int ask_password_agent(const char *message, const char *icon, usec_t until, char **_passphrase);
+
+#endif
index 1d89eaf..596c8e0 100644 (file)
 #include "log.h"
 #include "macro.h"
 #include "util.h"
+#include "ask-password-api.h"
 
 static const char *arg_icon = NULL;
 static const char *arg_message = NULL;
 static bool arg_use_tty = true;
 static usec_t arg_timeout = 60 * USEC_PER_SEC;
 
-static int create_socket(char **name) {
-        int fd;
-        union {
-                struct sockaddr sa;
-                struct sockaddr_un un;
-        } sa;
-        int one = 1, r;
-        char *c;
-
-        assert(name);
-
-        if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
-                log_error("socket() failed: %m");
-                return -errno;
-        }
-
-        zero(sa);
-        sa.un.sun_family = AF_UNIX;
-        snprintf(sa.un.sun_path, sizeof(sa.un.sun_path)-1, "/dev/.systemd/ask-password/sck.%llu", random_ull());
-
-        if (bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
-                r = -errno;
-                log_error("bind() failed: %m");
-                goto fail;
-        }
-
-        if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) {
-                r = -errno;
-                log_error("SO_PASSCRED failed: %m");
-                goto fail;
-        }
-
-        if (!(c = strdup(sa.un.sun_path))) {
-                r = -ENOMEM;
-                log_error("Out of memory");
-                goto fail;
-        }
-
-        *name = c;
-        return fd;
-
-fail:
-        close_nointr_nofail(fd);
-
-        return r;
-}
-
 static int help(void) {
 
         printf("%s [OPTIONS...] MESSAGE\n\n"
@@ -166,222 +120,9 @@ static int parse_argv(int argc, char *argv[]) {
         return 1;
 }
 
-static int ask_agent(void) {
-        enum {
-                FD_SOCKET,
-                FD_SIGNAL,
-                _FD_MAX
-        };
-
-        char temp[] = "/dev/.systemd/ask-password/tmp.XXXXXX";
-        char final[sizeof(temp)] = "";
-        int fd = -1, r;
-        FILE *f = NULL;
-        char *socket_name = NULL;
-        int socket_fd = -1, signal_fd = -1;
-        sigset_t mask;
-        usec_t not_after;
-        struct pollfd pollfd[_FD_MAX];
-
-        mkdir_p("/dev/.systemd/ask-password", 0755);
-
-        if ((fd = mkostemp(temp, O_CLOEXEC|O_CREAT|O_WRONLY)) < 0) {
-                log_error("Failed to create password file: %m");
-                r = -errno;
-                goto finish;
-        }
-
-        fchmod(fd, 0644);
-
-        if (!(f = fdopen(fd, "w"))) {
-                log_error("Failed to allocate FILE: %m");
-                r = -errno;
-                goto finish;
-        }
-
-        fd = -1;
-
-        assert_se(sigemptyset(&mask) == 0);
-        sigset_add_many(&mask, SIGINT, SIGTERM, -1);
-        assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
-
-        if ((signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0) {
-                log_error("signalfd(): %m");
-                r = -errno;
-                goto finish;
-        }
-
-        if ((socket_fd = create_socket(&socket_name)) < 0) {
-                r = socket_fd;
-                goto finish;
-        }
-
-        not_after = now(CLOCK_MONOTONIC) + arg_timeout;
-
-        fprintf(f,
-                "[Ask]\n"
-                "PID=%lu\n"
-                "Socket=%s\n"
-                "NotAfter=%llu\n",
-                (unsigned long) getpid(),
-                socket_name,
-                (unsigned long long) not_after);
-
-        if (arg_message)
-                fprintf(f, "Message=%s\n", arg_message);
-
-        if (arg_icon)
-                fprintf(f, "Icon=%s\n", arg_icon);
-
-        fflush(f);
-
-        if (ferror(f)) {
-                log_error("Failed to write query file: %m");
-                r = -errno;
-                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) {
-                log_error("Failed to rename query file: %m");
-                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;
-
-                if ((k = poll(pollfd, _FD_MAX, arg_timeout/USEC_PER_MSEC)) < 0) {
-
-                        if (errno == EINTR)
-                                continue;
-
-                        log_error("poll() failed: %m");
-                        r = -errno;
-                        goto finish;
-                }
-
-                if (k <= 0) {
-                        log_notice("Timed out");
-                        r = -ETIME;
-                        goto finish;
-                }
-
-                if (pollfd[FD_SIGNAL].revents & POLLIN)
-                        break;
-
-                if (pollfd[FD_SOCKET].revents != POLLIN) {
-                        log_error("Unexpected poll() event.");
-                        r = -EIO;
-                        goto finish;
-                }
-
-                zero(iovec);
-                iovec.iov_base = passphrase;
-                iovec.iov_len = sizeof(passphrase)-1;
-
-                zero(control);
-                zero(msghdr);
-                msghdr.msg_iov = &iovec;
-                msghdr.msg_iovlen = 1;
-                msghdr.msg_control = &control;
-                msghdr.msg_controllen = sizeof(control);
-
-                if ((n = recvmsg(socket_fd, &msghdr, 0)) < 0) {
-
-                        if (errno == EAGAIN ||
-                            errno == EINTR)
-                                continue;
-
-                        log_error("recvmsg() failed: %m");
-                        r = -errno;
-                        goto finish;
-                }
-
-                if (n <= 0) {
-                        log_error("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_warning("Received message without credentials. Ignoring.");
-                        continue;
-                }
-
-                ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
-                if (ucred->uid != 0) {
-                        log_warning("Got request from unprivileged user. Ignoring.");
-                        continue;
-                }
-
-                if (passphrase[0] == '+') {
-                        passphrase[n] = 0;
-                        fputs(passphrase+1, stdout);
-                        fflush(stdout);
-                } else if (passphrase[0] == '-') {
-                        r = -ECANCELED;
-                        goto finish;
-                } else {
-                        log_error("Invalid packet");
-                        continue;
-                }
-
-                break;
-        }
-
-        r = 0;
-
-finish:
-        if (fd >= 0)
-                close_nointr_nofail(fd);
-
-        if (socket_name) {
-                unlink(socket_name);
-                free(socket_name);
-        }
-
-        if (socket_fd >= 0)
-                close_nointr_nofail(socket_fd);
-
-        if (signal_fd >= 0)
-                close_nointr_nofail(signal_fd);
-
-        if (f)
-                fclose(f);
-
-        unlink(temp);
-
-        if (final[0])
-                unlink(final);
-
-        return r;
-}
-
 int main(int argc, char *argv[]) {
         int r;
+        char *password = NULL;
 
         log_parse_environment();
         log_open();
@@ -389,18 +130,18 @@ int main(int argc, char *argv[]) {
         if ((r = parse_argv(argc, argv)) <= 0)
                 goto finish;
 
-        if (arg_use_tty && isatty(STDIN_FILENO)) {
-                char *password = NULL;
-
-                if ((r = ask_password_tty(arg_message, now(CLOCK_MONOTONIC) + arg_timeout, NULL, &password)) >= 0) {
-                        fputs(password, stdout);
-                        fflush(stdout);
-                        free(password);
-                }
+        if (arg_use_tty && isatty(STDIN_FILENO))
+                r = ask_password_tty(arg_message, now(CLOCK_MONOTONIC) + arg_timeout, NULL, &password);
+        else
+                r = ask_password_agent(arg_message, arg_icon, now(CLOCK_MONOTONIC) + arg_timeout, &password);
 
-        } else
-                r = ask_agent();
+        if (r >= 0) {
+                fputs(password, stdout);
+                fflush(stdout);
+        }
 
 finish:
+        free(password);
+
         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 }
index 792c1f5..73c3679 100644 (file)
@@ -102,7 +102,7 @@ static int create_disk(
                 "DefaultDependencies=no\n"
                 "BindTo=%s\n"
                 "After=systemd-readahead-collect.service systemd-readahead-replay.service %s\n"
-                "Before=dev-mapper-%%f.device shutdown.target\n",
+                "Before=dev-mapper-%%i.device shutdown.target\n",
                 d, d);
 
         if (password && (streq(password, "/dev/urandom") ||
@@ -116,8 +116,8 @@ static int create_disk(
                 "Type=oneshot\n"
                 "RemainAfterExit=yes\n"
                 "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " %s '%s' '%s' '%s' '%s'\n"
-                "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " remove '%s'\n",
-                options && has_option(options, "swap") ? "format" : "create",
+                "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
+                options && has_option(options, "swap") ? "format-and-attach" : "attach",
                 name, u, strempty(password), strempty(options),
                 name);
 
index 2231247..7d5d3db 100644 (file)
 ***/
 
 #include <string.h>
+#include <errno.h>
+
+#include <libcryptsetup.h>
 
 #include "log.h"
 #include "util.h"
+#include "ask-password-api.h"
+
+static unsigned opt_tries = 0;
+static char *opt_cipher = NULL;
+static unsigned opt_size = 0;
+static char *opt_hash = NULL;
+static bool opt_readonly = false;
+static bool opt_verify = false;
+static usec_t arg_timeout = 0;
+
+static int parse_one_option(const char *option) {
+        assert(option);
+
+        /* Handled outside of this tool */
+        if (streq(option, "swap") ||
+            streq(option, "tmp") ||
+            streq(option, "noauto"))
+                return 0;
+
+        if (startswith(option, "cipher=")) {
+                char *t;
+
+                if (!(t = strdup(option+7)))
+                        return -ENOMEM;
+
+                free(opt_cipher);
+                opt_cipher = t;
+
+        } else if (startswith(option, "size=")) {
+
+                if (safe_atou(option+5, &opt_size) < 0) {
+                        log_error("size= parse failure, ignoring.");
+                        return 0;
+                }
+
+        } else if (startswith(option, "hash=")) {
+                char *t;
+
+                if (!(t = strdup(option+5)))
+                        return -ENOMEM;
+
+                free(opt_hash);
+                opt_hash = t;
+
+        } else if (startswith(option, "tries=")) {
+
+                if (safe_atou(option+6, &opt_tries) < 0) {
+                        log_error("tries= parse failure, ignoring.");
+                        return 0;
+                }
+
+        } else if (streq(option, "readonly"))
+                opt_readonly = true;
+        else if (streq(option, "verify"))
+                opt_verify = true;
+        else if (startswith(option, "timeout=")) {
+
+                if (parse_usec(option+8, &arg_timeout) < 0) {
+                        log_error("timeout= parse failure, ignoring.");
+                        return 0;
+                }
+
+        } else
+                log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
+
+        return 0;
+}
+
+static int parse_options(const char *options) {
+        char *state;
+        char *w;
+        size_t l;
+
+        assert(options);
+
+        FOREACH_WORD_SEPARATOR(w, l, options, ",", state) {
+                char *o;
+                int r;
+
+                if (!(o = strndup(w, l)))
+                        return -ENOMEM;
+
+                r = parse_one_option(o);
+                free(o);
+
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static void log_glue(int level, const char *msg, void *usrptr) {
+
+        log_full(level == CRYPT_LOG_ERROR   ? LOG_ERR :
+                 level == CRYPT_LOG_VERBOSE ? LOG_INFO :
+                 level == CRYPT_LOG_DEBUG   ? LOG_DEBUG :
+                                              LOG_NOTICE,
+                 "%s", msg);
+}
+
+static int password_glue(const char *msg, char *buf, size_t length, void *usrptr) {
+        usec_t until;
+        char *password = NULL;
+        int k;
+
+        until = now(CLOCK_MONOTONIC) + (arg_timeout > 0 ? arg_timeout : 60 * USEC_PER_SEC);
+
+        if ((k = ask_password_agent(msg, "drive-harddisk", until, &password)) < 0)
+                return k;
+
+        strncpy(buf, password, length-1);
+        buf[length-1] = 0;
+
+        free(password);
+
+        return strlen(buf);
+}
 
 int main(int argc, char *argv[]) {
-        int r = EXIT_SUCCESS;
+        int r = EXIT_FAILURE;
+        struct crypt_device *cd = NULL;
 
         if (argc < 3) {
                 log_error("This program requires at least two arguments.");
@@ -36,18 +158,90 @@ int main(int argc, char *argv[]) {
         log_parse_environment();
         log_open();
 
-        if (streq(argv[1], "create")) {
+        if (streq(argv[1], "attach") ||
+            streq(argv[1], "format-and-attach")) {
+                uint32_t flags = 0;
+                int k;
+                const char *key_file = NULL;
+
+                if (argc < 4) {
+                        log_error("attach requires at least two arguments.");
+                        goto finish;
+                }
+
+                if (argc >= 5 && argv[4][0] && !streq(argv[4], "-")) {
+
+                        if (!path_is_absolute(argv[4]))
+                                log_error("Password file path %s is not absolute. Ignoring.", argv[4]);
+                        else
+                                key_file = argv[4];
+                }
+
+                if (argc >= 6 && argv[5][0] && !streq(argv[5], "-"))
+                        parse_options(argv[5]);
 
-        } else if (streq(argv[1], "format")) {
+                if ((k = crypt_init(&cd, argv[3]))) {
+                        log_error("crypt_init() failed: %s", strerror(-k));
+                        goto finish;
+                }
 
+                crypt_set_log_callback(cd, log_glue, NULL);
+                crypt_set_password_callback(cd, password_glue, NULL);
 
-        } else if (streq(argv[1], "remove")) {
+                if (streq(argv[1], "format-and-attach")) {
+
+                        /* Format with random key and attach */
+
+                        log_error("Formatting not yet supported.");
+                        goto finish;
+
+                } else if ((k = crypt_load(cd, CRYPT_LUKS1, NULL))) {
+                        log_error("crypt_load() failed: %s", strerror(-k));
+                        goto finish;
+                }
+
+                if (opt_readonly)
+                        flags |= CRYPT_ACTIVATE_READONLY;
+
+                if (key_file) {
+                        crypt_set_password_retry(cd, 1);
+                        k = crypt_activate_by_keyfile(cd, argv[2], CRYPT_ANY_SLOT, key_file, 0, flags);
+                } else  {
+                        crypt_set_password_retry(cd, opt_tries > 0 ? opt_tries : 3);
+                        k = crypt_activate_by_passphrase(cd, argv[2], CRYPT_ANY_SLOT, NULL, 0, flags);
+                }
+
+                if (k < 0) {
+                        log_error("Failed to activate: %s", strerror(-k));
+                        goto finish;
+                }
+
+        } else if (streq(argv[1], "detach")) {
+                int k;
+
+                if ((k = crypt_init_by_name(&cd, argv[2]))) {
+                        log_error("crypt_init() failed: %s", strerror(-k));
+                        goto finish;
+                }
+
+                crypt_set_log_callback(cd, log_glue, NULL);
+
+                if ((k = crypt_deactivate(cd, argv[2])) < 0) {
+                        log_error("Failed to deactivate: %s", strerror(-k));
+                        goto finish;
+                }
 
         } else {
                 log_error("Unknown verb %s.", argv[1]);
                 goto finish;
         }
 
+        r = EXIT_SUCCESS;
+
 finish:
+
+        if (cd)
+                crypt_free(cd);
+
         return r;
 }
index d2dc8b9..9640fca 100644 (file)
@@ -2842,6 +2842,8 @@ void manager_run_generators(Manager *m) {
                         _exit(EXIT_FAILURE);
                 }
 
+                log_debug("Spawned generator %s as %lu", path, (unsigned long) pid);
+
                 if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
                         log_error("Failed to add PID to set: %s", strerror(-k));
                         free(path);
@@ -2868,7 +2870,8 @@ void manager_run_generators(Manager *m) {
                                         log_error("%s exited with exit status %i.", path, si.si_status);
                                 else
                                         log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status));
-                        }
+                        } else
+                                log_debug("Generator %s exited successfully.", path);
 
                         free(path);
                 }
@@ -2894,6 +2897,8 @@ void manager_run_generators(Manager *m) {
 
                 strv_free(m->lookup_paths.unit_path);
                 m->lookup_paths.unit_path = l;
+
+                log_debug("Added generator unit path %s to search path.", m->generator_unit_path);
         }
 
 finish:
index d610cbd..e995622 100644 (file)
@@ -35,6 +35,7 @@
 #include "conf-parser.h"
 #include "utmp-wtmp.h"
 #include "socket-util.h"
+#include "ask-password-api.h"
 
 static enum {
         ACTION_LIST,
index f41861b..f762f97 100644 (file)
@@ -3373,170 +3373,6 @@ int signal_from_string_try_harder(const char *s) {
         return signo;
 }
 
-int ask_password_tty(const char *message, usec_t until, const char *flag_file, char **_passphrase) {
-        struct termios old_termios, new_termios;
-        char passphrase[LINE_MAX];
-        size_t p = 0;
-        int r, ttyfd = -1, notify = -1;
-        struct pollfd pollfd[2];
-        bool reset_tty = false;
-        enum {
-                POLL_TTY,
-                POLL_INOTIFY
-        };
-
-        assert(message);
-        assert(_passphrase);
-
-        if (flag_file) {
-                if ((notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) {
-                        r = -errno;
-                        goto finish;
-                }
-
-                if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0) {
-                        r = -errno;
-                        goto finish;
-                }
-        }
-
-        if ((ttyfd = open("/dev/tty", O_RDWR|O_NOCTTY|O_CLOEXEC)) >= 0) {
-
-                if (tcgetattr(ttyfd, &old_termios) < 0) {
-                        r = -errno;
-                        goto finish;
-                }
-
-                loop_write(ttyfd, "\x1B[1m", 4, false);
-                loop_write(ttyfd, message, strlen(message), false);
-                loop_write(ttyfd, ": ", 2, false);
-                loop_write(ttyfd, "\x1B[0m", 4, 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;
-        }
-
-        zero(pollfd);
-
-        pollfd[POLL_TTY].fd = ttyfd >= 0 ? ttyfd : STDIN_FILENO;
-        pollfd[POLL_TTY].events = POLLIN;
-        pollfd[POLL_INOTIFY].fd = notify;
-        pollfd[POLL_INOTIFY].events = POLLIN;
-
-        for (;;) {
-                char c;
-                int sleep_for = -1, k;
-                ssize_t n;
-
-                if (until > 0) {
-                        usec_t y;
-
-                        y = now(CLOCK_MONOTONIC);
-
-                        if (y > until) {
-                                r = -ETIMEDOUT;
-                                goto finish;
-                        }
-
-                        sleep_for = (int) ((until - y) / USEC_PER_MSEC);
-                }
-
-                if (flag_file)
-                        if (access(flag_file, F_OK) < 0) {
-                                r = -errno;
-                                goto finish;
-                        }
-
-                if ((k = poll(pollfd, notify > 0 ? 2 : 1, sleep_for)) < 0) {
-
-                        if (errno == EINTR)
-                                continue;
-
-                        r = -errno;
-                        goto finish;
-                } else if (k == 0) {
-                        r = -ETIMEDOUT;
-                        goto finish;
-                }
-
-                if (notify > 0 && pollfd[POLL_INOTIFY].revents != 0)
-                        flush_fd(notify);
-
-                if (pollfd[POLL_TTY].revents == 0)
-                        continue;
-
-                if ((n = read(ttyfd >= 0 ? ttyfd : STDIN_FILENO, &c, 1)) < 0) {
-
-                        if (errno == EINTR || errno == EAGAIN)
-                                continue;
-
-                        r = -errno;
-                        goto finish;
-
-                } else if (n == 0)
-                        break;
-
-                if (c == '\n')
-                        break;
-                else if (c == 21) {
-
-                        while (p > 0) {
-                                p--;
-
-                                if (ttyfd >= 0)
-                                        loop_write(ttyfd, "\b \b", 3, false);
-                        }
-
-                } else if (c == '\b' || c == 127) {
-                        if (p > 0) {
-                                p--;
-
-                                if (ttyfd >= 0)
-                                        loop_write(ttyfd, "\b \b", 3, false);
-                        }
-                } else {
-                        passphrase[p++] = c;
-
-                        if (ttyfd >= 0)
-                                loop_write(ttyfd, "*", 1, false);
-                }
-        }
-
-        if (ttyfd >= 0)
-                loop_write(ttyfd, "\n", 1, false);
-
-        passphrase[p] = 0;
-
-        if (!(*_passphrase = strdup(passphrase))) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        r = 0;
-
-finish:
-        if (notify >= 0)
-                close_nointr_nofail(notify);
-
-        if (ttyfd >= 0) {
-                if (reset_tty)
-                        tcsetattr(ttyfd, TCSADRAIN, &old_termios);
-
-                close_nointr_nofail(ttyfd);
-        }
-
-        return r;
-}
-
 void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) {
 
         assert(f);
index 5567da8..63538fe 100644 (file)
@@ -365,8 +365,6 @@ bool null_or_empty(struct stat *st);
 
 DIR *xopendirat(int dirfd, const char *name);
 
-int ask_password_tty(const char *message, usec_t until, const char *flag_file, char **_passphrase);
-
 void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
 void dual_timestamp_deserialize(const char *value, dual_timestamp *t);