Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 203 insertions, 0 deletions

diff --git a/src/integritysetup/integritysetup.c b/src/integritysetup/integritysetup.c
new file mode 100644
index 0000000..a602886
--- /dev/null
+++ b/src/integritysetup/integritysetup.c
@@ -0,0 +1,203 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <stdio.h>
+#include <sys/stat.h>
+
+#include "alloc-util.h"
+#include "cryptsetup-util.h"
+#include "fileio.h"
+#include "hexdecoct.h"
+#include "integrity-util.h"
+#include "log.h"
+#include "main-func.h"
+#include "memory-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "pretty-print.h"
+#include "process-util.h"
+#include "string-util.h"
+#include "terminal-util.h"
+
+static uint32_t arg_activate_flags;
+static int arg_percent;
+static usec_t arg_commit_time;
+static char *arg_existing_data_device;
+static char *arg_integrity_algorithm;
+
+STATIC_DESTRUCTOR_REGISTER(arg_existing_data_device, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_integrity_algorithm, freep);
+
+static int help(void) {
+        _cleanup_free_ char *link = NULL;
+        int r;
+
+        r = terminal_urlify_man("systemd-integritysetup@.service", "8", &link);
+        if (r < 0)
+                return log_oom();
+
+        printf("%s attach VOLUME DEVICE [HMAC_KEY_FILE|-] [OPTIONS]\n"
+               "%s detach VOLUME\n\n"
+               "Attach or detach an integrity protected block device.\n"
+               "\nSee the %s for details.\n",
+               program_invocation_short_name,
+               program_invocation_short_name,
+               link);
+
+        return 0;
+}
+
+static int load_key_file(
+                const char *key_file,
+                void **ret_key_file_contents,
+                size_t *ret_key_file_size) {
+        int r;
+        _cleanup_(erase_and_freep) char *tmp_key_file_contents = NULL;
+        size_t tmp_key_file_size;
+
+        if (!path_is_absolute(key_file))
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "key file not absolute path: %s", key_file);
+
+        r = read_full_file_full(
+                        AT_FDCWD, key_file, UINT64_MAX, DM_MAX_KEY_SIZE,
+                        READ_FULL_FILE_SECURE|READ_FULL_FILE_WARN_WORLD_READABLE|READ_FULL_FILE_CONNECT_SOCKET|READ_FULL_FILE_FAIL_WHEN_LARGER,
+                        NULL,
+                        &tmp_key_file_contents, &tmp_key_file_size);
+        if (r < 0)
+                return log_error_errno(r, "Failed to process key file: %m");
+
+        if (ret_key_file_contents && ret_key_file_size) {
+                *ret_key_file_contents = TAKE_PTR(tmp_key_file_contents);
+                *ret_key_file_size = tmp_key_file_size;
+        }
+
+        return 0;
+}
+
+static const char *integrity_algorithm_select(const void *key_file_buf) {
+        /*  To keep a bit of sanity for end users, the subset of integrity
+            algorithms we support will match what is used in integritysetup */
+        if (arg_integrity_algorithm) {
+                if (streq("hmac-sha256", arg_integrity_algorithm))
+                        return DM_HMAC_256;
+                return arg_integrity_algorithm;
+        } else if (key_file_buf)
+                return DM_HMAC_256;
+        return "crc32c";
+}
+
+static int run(int argc, char *argv[]) {
+        _cleanup_(crypt_freep) struct crypt_device *cd = NULL;
+        char *verb, *volume;
+        int r;
+
+        if (argv_looks_like_help(argc, argv))
+                return help();
+
+        if (argc < 3)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program requires at least two arguments.");
+
+        verb = argv[1];
+        volume = argv[2];
+
+        log_setup();
+
+        cryptsetup_enable_logging(NULL);
+
+        umask(0022);
+
+        if (streq(verb, "attach")) {
+                /* attach name device optional_key_file optional_options */
+
+                crypt_status_info status;
+                _cleanup_(erase_and_freep) void *key_buf = NULL;
+                const char *device, *key_file, *options;
+                size_t key_buf_size = 0;
+
+                if (argc < 4)
+                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach requires at least three arguments.");
+
+                if (argc > 6)
+                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach has a maximum of five arguments.");
+
+                device = argv[3];
+                key_file = mangle_none(argc > 4 ? argv[4] : NULL);
+                options = mangle_none(argc > 5 ? argv[5] : NULL);
+
+                if (!filename_is_valid(volume))
+                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Volume name '%s' is not valid.", volume);
+
+                if (key_file) {
+                        r = load_key_file(key_file, &key_buf, &key_buf_size);
+                        if (r < 0)
+                                return r;
+                }
+
+                if (options) {
+                        r = parse_integrity_options(options, &arg_activate_flags, &arg_percent,
+                                                    &arg_commit_time, &arg_existing_data_device, &arg_integrity_algorithm);
+                        if (r < 0)
+                                return r;
+                }
+
+                r = crypt_init(&cd, device);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to open integrity device %s: %m", device);
+
+                cryptsetup_enable_logging(cd);
+
+                status = crypt_status(cd, volume);
+                if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
+                        log_info("Volume %s already active.", volume);
+                        return 0;
+                }
+
+                r = crypt_load(cd,
+                        CRYPT_INTEGRITY,
+                        &(struct crypt_params_integrity) {
+                                .journal_watermark = arg_percent,
+                                .journal_commit_time = DIV_ROUND_UP(arg_commit_time, USEC_PER_SEC),
+                                .integrity = integrity_algorithm_select(key_buf),
+                        });
+                if (r < 0)
+                        return log_error_errno(r, "Failed to load integrity superblock: %m");
+
+                if (!isempty(arg_existing_data_device)) {
+                        r = crypt_set_data_device(cd, arg_existing_data_device);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to add separate data device: %m");
+                }
+
+                r = crypt_activate_by_volume_key(cd, volume, key_buf, key_buf_size, arg_activate_flags);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to set up integrity device: %m");
+
+        } else if (streq(verb, "detach")) {
+
+                if (argc > 3)
+                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "detach has a maximum of two arguments.");
+
+                if (!filename_is_valid(volume))
+                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Volume name '%s' is not valid.", volume);
+
+                r = crypt_init_by_name(&cd, volume);
+                if (r == -ENODEV) {
+                        log_info("Volume %s already inactive.", volume);
+                        return 0;
+                }
+                if (r < 0)
+                        return log_error_errno(r, "crypt_init_by_name() failed: %m");
+
+                cryptsetup_enable_logging(cd);
+
+                r = crypt_deactivate(cd, volume);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to deactivate: %m");
+
+        } else
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb %s.", verb);
+
+        return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);