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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 08:06:26 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 08:06:26 +0000
commit1660d4b7a65d9ad2ce0deaa19d35579ca4084ac5 (patch)
tree6cf8220b628ebd2ccfc1375dd6516c6996e9abcc /lib/luks2/luks2_json_metadata.c
parentInitial commit. (diff)
downloadcryptsetup-upstream.tar.xz
cryptsetup-upstream.zip
Adding upstream version 2:2.6.1.upstream/2%2.6.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--lib/luks2/luks2_json_metadata.c2874
1 files changed, 2874 insertions, 0 deletions
diff --git a/lib/luks2/luks2_json_metadata.c b/lib/luks2/luks2_json_metadata.c
new file mode 100644
index 0000000..4771f04
--- /dev/null
+++ b/lib/luks2/luks2_json_metadata.c
@@ -0,0 +1,2874 @@
+/*
+ * LUKS - Linux Unified Key Setup v2
+ *
+ * Copyright (C) 2015-2023 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2015-2023 Milan Broz
+ * Copyright (C) 2015-2023 Ondrej Kozina
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "luks2_internal.h"
+#include "../integrity/integrity.h"
+#include <ctype.h>
+#include <uuid/uuid.h>
+
+#define LUKS_STRIPES 4000
+
+struct interval {
+ uint64_t offset;
+ uint64_t length;
+};
+
+void hexprint_base64(struct crypt_device *cd, json_object *jobj,
+ const char *sep, const char *line_sep)
+{
+ char *buf = NULL;
+ size_t buf_len;
+ unsigned int i;
+
+ if (crypt_base64_decode(&buf, &buf_len, json_object_get_string(jobj),
+ json_object_get_string_len(jobj)))
+ return;
+
+ for (i = 0; i < buf_len; i++) {
+ if (i && !(i % 16))
+ log_std(cd, "\n\t%s", line_sep);
+ log_std(cd, "%02hhx%s", buf[i], sep);
+ }
+ log_std(cd, "\n");
+ free(buf);
+}
+
+void JSON_DBG(struct crypt_device *cd, json_object *jobj, const char *desc)
+{
+ if (desc)
+ crypt_log(cd, CRYPT_LOG_DEBUG_JSON, desc);
+ crypt_log(cd, CRYPT_LOG_DEBUG_JSON, json_object_to_json_string_ext(jobj,
+ JSON_C_TO_STRING_PRETTY | JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+/*
+ * JSON array helpers
+ */
+struct json_object *LUKS2_array_jobj(struct json_object *array, const char *num)
+{
+ struct json_object *jobj1;
+ int i;
+
+ for (i = 0; i < (int) json_object_array_length(array); i++) {
+ jobj1 = json_object_array_get_idx(array, i);
+ if (!strcmp(num, json_object_get_string(jobj1)))
+ return jobj1;
+ }
+
+ return NULL;
+}
+
+struct json_object *LUKS2_array_remove(struct json_object *array, const char *num)
+{
+ struct json_object *jobj1, *jobj_removing = NULL, *array_new;
+ int i;
+
+ jobj_removing = LUKS2_array_jobj(array, num);
+ if (!jobj_removing)
+ return NULL;
+
+ /* Create new array without jobj_removing. */
+ array_new = json_object_new_array();
+ for (i = 0; i < (int) json_object_array_length(array); i++) {
+ jobj1 = json_object_array_get_idx(array, i);
+ if (jobj1 != jobj_removing)
+ json_object_array_add(array_new, json_object_get(jobj1));
+ }
+
+ return array_new;
+}
+
+/*
+ * JSON struct access helpers
+ */
+json_object *LUKS2_get_keyslot_jobj(struct luks2_hdr *hdr, int keyslot)
+{
+ json_object *jobj1, *jobj2;
+ char keyslot_name[16];
+
+ if (!hdr || keyslot < 0)
+ return NULL;
+
+ if (snprintf(keyslot_name, sizeof(keyslot_name), "%u", keyslot) < 1)
+ return NULL;
+
+ if (!json_object_object_get_ex(hdr->jobj, "keyslots", &jobj1))
+ return NULL;
+
+ if (!json_object_object_get_ex(jobj1, keyslot_name, &jobj2))
+ return NULL;
+
+ return jobj2;
+}
+
+json_object *LUKS2_get_tokens_jobj(struct luks2_hdr *hdr)
+{
+ json_object *jobj_tokens;
+
+ if (!hdr || !json_object_object_get_ex(hdr->jobj, "tokens", &jobj_tokens))
+ return NULL;
+
+ return jobj_tokens;
+}
+
+json_object *LUKS2_get_token_jobj(struct luks2_hdr *hdr, int token)
+{
+ json_object *jobj1, *jobj2;
+ char token_name[16];
+
+ if (!hdr || token < 0)
+ return NULL;
+
+ jobj1 = LUKS2_get_tokens_jobj(hdr);
+ if (!jobj1)
+ return NULL;
+
+ if (snprintf(token_name, sizeof(token_name), "%u", token) < 1)
+ return NULL;
+
+ json_object_object_get_ex(jobj1, token_name, &jobj2);
+ return jobj2;
+}
+
+json_object *LUKS2_get_digest_jobj(struct luks2_hdr *hdr, int digest)
+{
+ json_object *jobj1, *jobj2;
+ char digest_name[16];
+
+ if (!hdr || digest < 0)
+ return NULL;
+
+ if (snprintf(digest_name, sizeof(digest_name), "%u", digest) < 1)
+ return NULL;
+
+ if (!json_object_object_get_ex(hdr->jobj, "digests", &jobj1))
+ return NULL;
+
+ json_object_object_get_ex(jobj1, digest_name, &jobj2);
+ return jobj2;
+}
+
+static json_object *json_get_segments_jobj(json_object *hdr_jobj)
+{
+ json_object *jobj_segments;
+
+ if (!hdr_jobj || !json_object_object_get_ex(hdr_jobj, "segments", &jobj_segments))
+ return NULL;
+
+ return jobj_segments;
+}
+
+json_object *LUKS2_get_segment_jobj(struct luks2_hdr *hdr, int segment)
+{
+ if (!hdr)
+ return NULL;
+
+ if (segment == CRYPT_DEFAULT_SEGMENT)
+ segment = LUKS2_get_default_segment(hdr);
+
+ return json_segments_get_segment(json_get_segments_jobj(hdr->jobj), segment);
+}
+
+json_object *LUKS2_get_segments_jobj(struct luks2_hdr *hdr)
+{
+ return hdr ? json_get_segments_jobj(hdr->jobj) : NULL;
+}
+
+int LUKS2_segments_count(struct luks2_hdr *hdr)
+{
+ if (!hdr)
+ return -EINVAL;
+
+ return json_segments_count(LUKS2_get_segments_jobj(hdr));
+}
+
+int LUKS2_get_default_segment(struct luks2_hdr *hdr)
+{
+ int s = LUKS2_get_segment_id_by_flag(hdr, "backup-final");
+ if (s >= 0)
+ return s;
+
+ if (LUKS2_segments_count(hdr) >= 1)
+ return 0;
+
+ return -EINVAL;
+}
+
+/*
+ * json_type_int needs to be validated first.
+ * See validate_json_uint32()
+ */
+uint32_t crypt_jobj_get_uint32(json_object *jobj)
+{
+ return json_object_get_int64(jobj);
+}
+
+/* jobj has to be json_type_string and numbered */
+static bool json_str_to_uint64(json_object *jobj, uint64_t *value)
+{
+ char *endptr;
+ unsigned long long tmp;
+
+ errno = 0;
+ tmp = strtoull(json_object_get_string(jobj), &endptr, 10);
+ if (*endptr || errno) {
+ *value = 0;
+ return false;
+ }
+
+ *value = tmp;
+ return true;
+}
+
+uint64_t crypt_jobj_get_uint64(json_object *jobj)
+{
+ uint64_t r;
+ json_str_to_uint64(jobj, &r);
+ return r;
+}
+
+json_object *crypt_jobj_new_uint64(uint64_t value)
+{
+ /* 18446744073709551615 */
+ char num[21];
+ int r;
+ json_object *jobj;
+
+ r = snprintf(num, sizeof(num), "%" PRIu64, value);
+ if (r < 0 || (size_t)r >= sizeof(num))
+ return NULL;
+
+ jobj = json_object_new_string(num);
+ return jobj;
+}
+
+/*
+ * Validate helpers
+ */
+static bool numbered(struct crypt_device *cd, const char *name, const char *key)
+{
+ int i;
+
+ for (i = 0; key[i]; i++)
+ if (!isdigit(key[i])) {
+ log_dbg(cd, "%s \"%s\" is not in numbered form.", name, key);
+ return false;
+ }
+ return true;
+}
+
+json_object *json_contains(struct crypt_device *cd, json_object *jobj, const char *name,
+ const char *section, const char *key, json_type type)
+{
+ json_object *sobj;
+
+ if (!json_object_object_get_ex(jobj, key, &sobj) ||
+ !json_object_is_type(sobj, type)) {
+ log_dbg(cd, "%s \"%s\" is missing \"%s\" (%s) specification.",
+ section, name, key, json_type_to_name(type));
+ return NULL;
+ }
+
+ return sobj;
+}
+
+json_object *json_contains_string(struct crypt_device *cd, json_object *jobj,
+ const char *name, const char *section, const char *key)
+{
+ json_object *sobj = json_contains(cd, jobj, name, section, key, json_type_string);
+
+ if (!sobj)
+ return NULL;
+
+ if (strlen(json_object_get_string(sobj)) < 1)
+ return NULL;
+
+ return sobj;
+}
+
+bool validate_json_uint32(json_object *jobj)
+{
+ int64_t tmp;
+
+ errno = 0;
+ tmp = json_object_get_int64(jobj);
+
+ return (errno || tmp < 0 || tmp > UINT32_MAX) ? false : true;
+}
+
+static bool validate_keyslots_array(struct crypt_device *cd, json_object *jarr, json_object *jobj_keys)
+{
+ json_object *jobj;
+ int i = 0, length = (int) json_object_array_length(jarr);
+
+ while (i < length) {
+ jobj = json_object_array_get_idx(jarr, i);
+ if (!json_object_is_type(jobj, json_type_string)) {
+ log_dbg(cd, "Illegal value type in keyslots array at index %d.", i);
+ return false;
+ }
+
+ if (!json_contains(cd, jobj_keys, "", "Keyslots section",
+ json_object_get_string(jobj), json_type_object))
+ return false;
+
+ i++;
+ }
+
+ return true;
+}
+
+static bool validate_segments_array(struct crypt_device *cd, json_object *jarr, json_object *jobj_segments)
+{
+ json_object *jobj;
+ int i = 0, length = (int) json_object_array_length(jarr);
+
+ while (i < length) {
+ jobj = json_object_array_get_idx(jarr, i);
+ if (!json_object_is_type(jobj, json_type_string)) {
+ log_dbg(cd, "Illegal value type in segments array at index %d.", i);
+ return false;
+ }
+
+ if (!json_contains(cd, jobj_segments, "", "Segments section",
+ json_object_get_string(jobj), json_type_object))
+ return false;
+
+ i++;
+ }
+
+ return true;
+}
+
+static bool segment_has_digest(const char *segment_name, json_object *jobj_digests)
+{
+ json_object *jobj_segments;
+
+ json_object_object_foreach(jobj_digests, key, val) {
+ UNUSED(key);
+ json_object_object_get_ex(val, "segments", &jobj_segments);
+ if (LUKS2_array_jobj(jobj_segments, segment_name))
+ return true;
+ }
+
+ return false;
+}
+
+
+static bool validate_intervals(struct crypt_device *cd,
+ int length, const struct interval *ix,
+ uint64_t metadata_size, uint64_t keyslots_area_end)
+{
+ int j, i = 0;
+
+ while (i < length) {
+ /* Offset cannot be inside primary or secondary JSON area */
+ if (ix[i].offset < 2 * metadata_size) {
+ log_dbg(cd, "Illegal area offset: %" PRIu64 ".", ix[i].offset);
+ return false;
+ }
+
+ if (!ix[i].length) {
+ log_dbg(cd, "Area length must be greater than zero.");
+ return false;
+ }
+
+ if (ix[i].offset > (UINT64_MAX - ix[i].length)) {
+ log_dbg(cd, "Interval offset+length overflow.");
+ return false;
+ }
+
+ if ((ix[i].offset + ix[i].length) > keyslots_area_end) {
+ log_dbg(cd, "Area [%" PRIu64 ", %" PRIu64 "] overflows binary keyslots area (ends at offset: %" PRIu64 ").",
+ ix[i].offset, ix[i].offset + ix[i].length, keyslots_area_end);
+ return false;
+ }
+
+ for (j = 0; j < length; j++) {
+ if (i == j)
+ continue;
+
+ if (ix[j].offset > (UINT64_MAX - ix[j].length)) {
+ log_dbg(cd, "Interval offset+length overflow.");
+ return false;
+ }
+
+ if ((ix[i].offset >= ix[j].offset) && (ix[i].offset < (ix[j].offset + ix[j].length))) {
+ log_dbg(cd, "Overlapping areas [%" PRIu64 ",%" PRIu64 "] and [%" PRIu64 ",%" PRIu64 "].",
+ ix[i].offset, ix[i].offset + ix[i].length,
+ ix[j].offset, ix[j].offset + ix[j].length);
+ return false;
+ }
+ }
+
+ i++;
+ }
+
+ return true;
+}
+
+static int LUKS2_keyslot_validate(struct crypt_device *cd, json_object *hdr_keyslot, const char *key)
+{
+ json_object *jobj_key_size;
+
+ if (!json_contains_string(cd, hdr_keyslot, key, "Keyslot", "type"))
+ return 1;
+ if (!(jobj_key_size = json_contains(cd, hdr_keyslot, key, "Keyslot", "key_size", json_type_int)))
+ return 1;
+
+ /* enforce uint32_t type */
+ if (!validate_json_uint32(jobj_key_size)) {
+ log_dbg(cd, "Illegal field \"key_size\":%s.",
+ json_object_get_string(jobj_key_size));
+ return 1;
+ }
+
+ return 0;
+}
+
+int LUKS2_token_validate(struct crypt_device *cd,
+ json_object *hdr_jobj, json_object *jobj_token, const char *key)
+{
+ json_object *jarr, *jobj_keyslots;
+
+ /* keyslots are not yet validated, but we need to know token doesn't reference missing keyslot */
+ if (!json_object_object_get_ex(hdr_jobj, "keyslots", &jobj_keyslots))
+ return 1;
+
+ if (!json_contains_string(cd, jobj_token, key, "Token", "type"))
+ return 1;
+
+ jarr = json_contains(cd, jobj_token, key, "Token", "keyslots", json_type_array);
+ if (!jarr)
+ return 1;
+
+ if (!validate_keyslots_array(cd, jarr, jobj_keyslots))
+ return 1;
+
+ return 0;
+}
+
+static int hdr_validate_json_size(struct crypt_device *cd, json_object *hdr_jobj, uint64_t hdr_json_size)
+{
+ json_object *jobj, *jobj1;
+ const char *json;
+ uint64_t json_area_size, json_size;
+
+ json_object_object_get_ex(hdr_jobj, "config", &jobj);
+ json_object_object_get_ex(jobj, "json_size", &jobj1);
+
+ json = json_object_to_json_string_ext(hdr_jobj,
+ JSON_C_TO_STRING_PLAIN | JSON_C_TO_STRING_NOSLASHESCAPE);
+ json_area_size = crypt_jobj_get_uint64(jobj1);
+ json_size = (uint64_t)strlen(json);
+
+ if (hdr_json_size != json_area_size) {
+ log_dbg(cd, "JSON area size does not match value in binary header.");
+ return 1;
+ }
+
+ if (json_size > json_area_size) {
+ log_dbg(cd, "JSON does not fit in the designated area.");
+ return 1;
+ }
+
+ return 0;
+}
+
+int LUKS2_check_json_size(struct crypt_device *cd, const struct luks2_hdr *hdr)
+{
+ return hdr_validate_json_size(cd, hdr->jobj, hdr->hdr_size - LUKS2_HDR_BIN_LEN);
+}
+
+static int hdr_validate_keyslots(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ json_object *jobj;
+
+ if (!(jobj = json_contains(cd, hdr_jobj, "", "JSON area", "keyslots", json_type_object)))
+ return 1;
+
+ json_object_object_foreach(jobj, key, val) {
+ if (!numbered(cd, "Keyslot", key))
+ return 1;
+ if (LUKS2_keyslot_validate(cd, val, key))
+ return 1;
+ }
+
+ return 0;
+}
+
+static int hdr_validate_tokens(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ json_object *jobj;
+
+ if (!(jobj = json_contains(cd, hdr_jobj, "", "JSON area", "tokens", json_type_object)))
+ return 1;
+
+ json_object_object_foreach(jobj, key, val) {
+ if (!numbered(cd, "Token", key))
+ return 1;
+ if (LUKS2_token_validate(cd, hdr_jobj, val, key))
+ return 1;
+ }
+
+ return 0;
+}
+
+static int hdr_validate_crypt_segment(struct crypt_device *cd, json_object *jobj,
+ const char *key, json_object *jobj_digests,
+ uint64_t size)
+{
+ int r;
+ json_object *jobj_ivoffset, *jobj_sector_size, *jobj_integrity;
+ uint32_t sector_size;
+ uint64_t ivoffset;
+
+ if (!(jobj_ivoffset = json_contains_string(cd, jobj, key, "Segment", "iv_tweak")) ||
+ !json_contains_string(cd, jobj, key, "Segment", "encryption") ||
+ !(jobj_sector_size = json_contains(cd, jobj, key, "Segment", "sector_size", json_type_int)))
+ return 1;
+
+ /* integrity */
+ if (json_object_object_get_ex(jobj, "integrity", &jobj_integrity)) {
+ if (!json_contains(cd, jobj, key, "Segment", "integrity", json_type_object) ||
+ !json_contains_string(cd, jobj_integrity, key, "Segment integrity", "type") ||
+ !json_contains_string(cd, jobj_integrity, key, "Segment integrity", "journal_encryption") ||
+ !json_contains_string(cd, jobj_integrity, key, "Segment integrity", "journal_integrity"))
+ return 1;
+ }
+
+ /* enforce uint32_t type */
+ if (!validate_json_uint32(jobj_sector_size)) {
+ log_dbg(cd, "Illegal field \"sector_size\":%s.",
+ json_object_get_string(jobj_sector_size));
+ return 1;
+ }
+
+ sector_size = crypt_jobj_get_uint32(jobj_sector_size);
+ if (!sector_size || MISALIGNED_512(sector_size)) {
+ log_dbg(cd, "Illegal sector size: %" PRIu32, sector_size);
+ return 1;
+ }
+
+ if (!numbered(cd, "iv_tweak", json_object_get_string(jobj_ivoffset)) ||
+ !json_str_to_uint64(jobj_ivoffset, &ivoffset)) {
+ log_dbg(cd, "Illegal iv_tweak value.");
+ return 1;
+ }
+
+ if (size % sector_size) {
+ log_dbg(cd, "Size field has to be aligned to sector size: %" PRIu32, sector_size);
+ return 1;
+ }
+
+ r = segment_has_digest(key, jobj_digests);
+
+ if (!r)
+ log_dbg(cd, "Crypt segment %s not assigned to key digest.", key);
+
+ return !r;
+}
+
+static bool validate_segment_intervals(struct crypt_device *cd,
+ int length, const struct interval *ix)
+{
+ int j, i = 0;
+
+ while (i < length) {
+ if (ix[i].length == UINT64_MAX && (i != (length - 1))) {
+ log_dbg(cd, "Only last regular segment is allowed to have 'dynamic' size.");
+ return false;
+ }
+
+ for (j = 0; j < length; j++) {
+ if (i == j)
+ continue;
+
+ if (ix[j].length != UINT64_MAX && ix[j].offset > (UINT64_MAX - ix[j].length)) {
+ log_dbg(cd, "Interval offset+length overflow.");
+ return false;
+ }
+
+ if ((ix[i].offset >= ix[j].offset) && (ix[j].length == UINT64_MAX || (ix[i].offset < (ix[j].offset + ix[j].length)))) {
+ log_dbg(cd, "Overlapping segments [%" PRIu64 ",%" PRIu64 "]%s and [%" PRIu64 ",%" PRIu64 "]%s.",
+ ix[i].offset, ix[i].offset + ix[i].length, ix[i].length == UINT64_MAX ? "(dynamic)" : "",
+ ix[j].offset, ix[j].offset + ix[j].length, ix[j].length == UINT64_MAX ? "(dynamic)" : "");
+ return false;
+ }
+ }
+
+ i++;
+ }
+
+ return true;
+}
+
+static int reqs_unknown(uint32_t reqs)
+{
+ return reqs & CRYPT_REQUIREMENT_UNKNOWN;
+}
+
+static int reqs_reencrypt(uint32_t reqs)
+{
+ return reqs & CRYPT_REQUIREMENT_OFFLINE_REENCRYPT;
+}
+
+static int reqs_reencrypt_online(uint32_t reqs)
+{
+ return reqs & CRYPT_REQUIREMENT_ONLINE_REENCRYPT;
+}
+
+/*
+ * Config section requirements object must be valid.
+ * Also general segments section must be validated first.
+ */
+static int validate_reencrypt_segments(struct crypt_device *cd, json_object *hdr_jobj, json_object *jobj_segments, int first_backup, int segments_count)
+{
+ json_object *jobj, *jobj_backup_previous = NULL, *jobj_backup_final = NULL;
+ uint32_t reqs;
+ int i, r;
+ struct luks2_hdr dummy = {
+ .jobj = hdr_jobj
+ };
+
+ r = LUKS2_config_get_requirements(cd, &dummy, &reqs);
+ if (r)
+ return 1;
+
+ if (reqs_reencrypt_online(reqs)) {
+ for (i = first_backup; i < segments_count; i++) {
+ jobj = json_segments_get_segment(jobj_segments, i);
+ if (!jobj)
+ return 1;
+ if (json_segment_contains_flag(jobj, "backup-final", 0))
+ jobj_backup_final = jobj;
+ else if (json_segment_contains_flag(jobj, "backup-previous", 0))
+ jobj_backup_previous = jobj;
+ }
+
+ if (!jobj_backup_final || !jobj_backup_previous) {
+ log_dbg(cd, "Backup segment is missing.");
+ return 1;
+ }
+
+ for (i = 0; i < first_backup; i++) {
+ jobj = json_segments_get_segment(jobj_segments, i);
+ if (!jobj)
+ return 1;
+
+ if (json_segment_contains_flag(jobj, "in-reencryption", 0)) {
+ if (!json_segment_cmp(jobj, jobj_backup_final)) {
+ log_dbg(cd, "Segment in reencryption does not match backup final segment.");
+ return 1;
+ }
+ continue;
+ }
+
+ if (!json_segment_cmp(jobj, jobj_backup_final) &&
+ !json_segment_cmp(jobj, jobj_backup_previous)) {
+ log_dbg(cd, "Segment does not match neither backup final or backup previous segment.");
+ return 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int hdr_validate_segments(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ json_object *jobj_segments, *jobj_digests, *jobj_offset, *jobj_size, *jobj_type, *jobj_flags, *jobj;
+ uint64_t offset, size;
+ int i, r, count, first_backup = -1;
+ struct interval *intervals = NULL;
+
+ if (!(jobj_segments = json_contains(cd, hdr_jobj, "", "JSON area", "segments", json_type_object)))
+ return 1;
+
+ count = json_object_object_length(jobj_segments);
+ if (count < 1) {
+ log_dbg(cd, "Empty segments section.");
+ return 1;
+ }
+
+ /* digests should already be validated */
+ if (!json_object_object_get_ex(hdr_jobj, "digests", &jobj_digests))
+ return 1;
+
+ json_object_object_foreach(jobj_segments, key, val) {
+ if (!numbered(cd, "Segment", key))
+ return 1;
+
+ /* those fields are mandatory for all segment types */
+ if (!(jobj_type = json_contains_string(cd, val, key, "Segment", "type")) ||
+ !(jobj_offset = json_contains_string(cd, val, key, "Segment", "offset")) ||
+ !(jobj_size = json_contains_string(cd, val, key, "Segment", "size")))
+ return 1;
+
+ if (!numbered(cd, "offset", json_object_get_string(jobj_offset)))
+ return 1;
+
+ if (!json_str_to_uint64(jobj_offset, &offset)) {
+ log_dbg(cd, "Illegal segment offset value.");
+ return 1;
+ }
+
+ /* size "dynamic" means whole device starting at 'offset' */
+ if (strcmp(json_object_get_string(jobj_size), "dynamic")) {
+ if (!numbered(cd, "size", json_object_get_string(jobj_size)))
+ return 1;
+ if (!json_str_to_uint64(jobj_size, &size) || !size) {
+ log_dbg(cd, "Illegal segment size value.");
+ return 1;
+ }
+ } else
+ size = 0;
+
+ /* all device-mapper devices are aligned to 512 sector size */
+ if (MISALIGNED_512(offset)) {
+ log_dbg(cd, "Offset field has to be aligned to sector size: %" PRIu32, SECTOR_SIZE);
+ return 1;
+ }
+ if (MISALIGNED_512(size)) {
+ log_dbg(cd, "Size field has to be aligned to sector size: %" PRIu32, SECTOR_SIZE);
+ return 1;
+ }
+
+ /* flags array is optional and must contain strings */
+ if (json_object_object_get_ex(val, "flags", NULL)) {
+ if (!(jobj_flags = json_contains(cd, val, key, "Segment", "flags", json_type_array)))
+ return 1;
+ for (i = 0; i < (int) json_object_array_length(jobj_flags); i++)
+ if (!json_object_is_type(json_object_array_get_idx(jobj_flags, i), json_type_string))
+ return 1;
+ }
+
+ i = atoi(key);
+ if (json_segment_is_backup(val)) {
+ if (first_backup < 0 || i < first_backup)
+ first_backup = i;
+ } else {
+ if ((first_backup >= 0) && i >= first_backup) {
+ log_dbg(cd, "Regular segment at %d is behind backup segment at %d", i, first_backup);
+ return 1;
+ }
+ }
+
+ /* crypt */
+ if (!strcmp(json_object_get_string(jobj_type), "crypt") &&
+ hdr_validate_crypt_segment(cd, val, key, jobj_digests, size))
+ return 1;
+ }
+
+ if (first_backup == 0) {
+ log_dbg(cd, "No regular segment.");
+ return 1;
+ }
+
+ /* avoid needlessly large allocation when first backup segment is invalid */
+ if (first_backup >= count) {
+ log_dbg(cd, "Gap between last regular segment and backup segment at key %d.", first_backup);
+ return 1;
+ }
+
+ if (first_backup < 0)
+ first_backup = count;
+
+ if ((size_t)first_backup < SIZE_MAX / sizeof(*intervals))
+ intervals = malloc(first_backup * sizeof(*intervals));
+
+ if (!intervals) {
+ log_dbg(cd, "Not enough memory.");
+ return 1;
+ }
+
+ for (i = 0; i < first_backup; i++) {
+ jobj = json_segments_get_segment(jobj_segments, i);
+ if (!jobj) {
+ log_dbg(cd, "Gap at key %d in segments object.", i);
+ free(intervals);
+ return 1;
+ }
+ intervals[i].offset = json_segment_get_offset(jobj, 0);
+ intervals[i].length = json_segment_get_size(jobj, 0) ?: UINT64_MAX;
+ }
+
+ r = !validate_segment_intervals(cd, first_backup, intervals);
+ free(intervals);
+
+ if (r)
+ return 1;
+
+ for (; i < count; i++) {
+ if (!json_segments_get_segment(jobj_segments, i)) {
+ log_dbg(cd, "Gap at key %d in segments object.", i);
+ return 1;
+ }
+ }
+
+ return validate_reencrypt_segments(cd, hdr_jobj, jobj_segments, first_backup, count);
+}
+
+static uint64_t LUKS2_metadata_size_jobj(json_object *jobj)
+{
+ json_object *jobj1, *jobj2;
+ uint64_t json_size;
+
+ json_object_object_get_ex(jobj, "config", &jobj1);
+ json_object_object_get_ex(jobj1, "json_size", &jobj2);
+ json_str_to_uint64(jobj2, &json_size);
+
+ return json_size + LUKS2_HDR_BIN_LEN;
+}
+
+uint64_t LUKS2_metadata_size(struct luks2_hdr *hdr)
+{
+ return LUKS2_metadata_size_jobj(hdr->jobj);
+}
+
+static int hdr_validate_areas(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ struct interval *intervals;
+ json_object *jobj_keyslots, *jobj_offset, *jobj_length, *jobj_segments, *jobj_area;
+ int length, ret, i = 0;
+ uint64_t metadata_size;
+
+ if (!json_object_object_get_ex(hdr_jobj, "keyslots", &jobj_keyslots))
+ return 1;
+
+ /* segments are already validated */
+ if (!json_object_object_get_ex(hdr_jobj, "segments", &jobj_segments))
+ return 1;
+
+ /* config is already validated */
+ metadata_size = LUKS2_metadata_size_jobj(hdr_jobj);
+
+ length = json_object_object_length(jobj_keyslots);
+
+ /* Empty section */
+ if (length == 0)
+ return 0;
+
+ if (length < 0) {
+ log_dbg(cd, "Invalid keyslot areas specification.");
+ return 1;
+ }
+
+ intervals = malloc(length * sizeof(*intervals));
+ if (!intervals) {
+ log_dbg(cd, "Not enough memory.");
+ return -ENOMEM;
+ }
+
+ json_object_object_foreach(jobj_keyslots, key, val) {
+
+ if (!(jobj_area = json_contains(cd, val, key, "Keyslot", "area", json_type_object)) ||
+ !json_contains_string(cd, jobj_area, key, "Keyslot area", "type") ||
+ !(jobj_offset = json_contains_string(cd, jobj_area, key, "Keyslot", "offset")) ||
+ !(jobj_length = json_contains_string(cd, jobj_area, key, "Keyslot", "size")) ||
+ !numbered(cd, "offset", json_object_get_string(jobj_offset)) ||
+ !numbered(cd, "size", json_object_get_string(jobj_length))) {
+ free(intervals);
+ return 1;
+ }
+
+ /* rule out values > UINT64_MAX */
+ if (!json_str_to_uint64(jobj_offset, &intervals[i].offset) ||
+ !json_str_to_uint64(jobj_length, &intervals[i].length)) {
+ log_dbg(cd, "Illegal keyslot area values.");
+ free(intervals);
+ return 1;
+ }
+
+ i++;
+ }
+
+ if (length != i) {
+ free(intervals);
+ return 1;
+ }
+
+ ret = validate_intervals(cd, length, intervals, metadata_size, LUKS2_hdr_and_areas_size_jobj(hdr_jobj)) ? 0 : 1;
+
+ free(intervals);
+
+ return ret;
+}
+
+static int hdr_validate_digests(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ json_object *jarr_keys, *jarr_segs, *jobj, *jobj_keyslots, *jobj_segments;
+
+ if (!(jobj = json_contains(cd, hdr_jobj, "", "JSON area", "digests", json_type_object)))
+ return 1;
+
+ /* keyslots are not yet validated, but we need to know digest doesn't reference missing keyslot */
+ if (!(jobj_keyslots = json_contains(cd, hdr_jobj, "", "JSON area", "keyslots", json_type_object)))
+ return 1;
+
+ /* segments are not yet validated, but we need to know digest doesn't reference missing segment */
+ if (!(jobj_segments = json_contains(cd, hdr_jobj, "", "JSON area", "segments", json_type_object)))
+ return 1;
+
+ json_object_object_foreach(jobj, key, val) {
+ if (!numbered(cd, "Digest", key))
+ return 1;
+
+ if (!json_contains_string(cd, val, key, "Digest", "type") ||
+ !(jarr_keys = json_contains(cd, val, key, "Digest", "keyslots", json_type_array)) ||
+ !(jarr_segs = json_contains(cd, val, key, "Digest", "segments", json_type_array)))
+ return 1;
+
+ if (!validate_keyslots_array(cd, jarr_keys, jobj_keyslots))
+ return 1;
+ if (!validate_segments_array(cd, jarr_segs, jobj_segments))
+ return 1;
+ }
+
+ return 0;
+}
+
+/* requirements being validated in stand-alone routine */
+static int hdr_validate_config(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ json_object *jobj_config, *jobj;
+ int i;
+ uint64_t keyslots_size, metadata_size, segment_offset;
+
+ if (!(jobj_config = json_contains(cd, hdr_jobj, "", "JSON area", "config", json_type_object)))
+ return 1;
+
+ if (!(jobj = json_contains_string(cd, jobj_config, "section", "Config", "json_size")))
+ return 1;
+ if (!json_str_to_uint64(jobj, &metadata_size)) {
+ log_dbg(cd, "Illegal config json_size value.");
+ return 1;
+ }
+
+ /* single metadata instance is assembled from json area size plus
+ * binary header size */
+ metadata_size += LUKS2_HDR_BIN_LEN;
+
+ if (!(jobj = json_contains_string(cd, jobj_config, "section", "Config", "keyslots_size")))
+ return 1;
+ if(!json_str_to_uint64(jobj, &keyslots_size)) {
+ log_dbg(cd, "Illegal config keyslot_size value.");
+ return 1;
+ }
+
+ if (LUKS2_check_metadata_area_size(metadata_size)) {
+ log_dbg(cd, "Unsupported LUKS2 header size (%" PRIu64 ").", metadata_size);
+ return 1;
+ }
+
+ if (LUKS2_check_keyslots_area_size(keyslots_size)) {
+ log_dbg(cd, "Unsupported LUKS2 keyslots size (%" PRIu64 ").", keyslots_size);
+ return 1;
+ }
+
+ /*
+ * validate keyslots_size fits in between (2 * metadata_size) and first
+ * segment_offset (except detached header)
+ */
+ segment_offset = json_segments_get_minimal_offset(json_get_segments_jobj(hdr_jobj), 0);
+ if (segment_offset &&
+ (segment_offset < keyslots_size ||
+ (segment_offset - keyslots_size) < (2 * metadata_size))) {
+ log_dbg(cd, "keyslots_size is too large %" PRIu64 " (bytes). Data offset: %" PRIu64
+ ", keyslots offset: %" PRIu64, keyslots_size, segment_offset, 2 * metadata_size);
+ return 1;
+ }
+
+ /* Flags array is optional */
+ if (json_object_object_get_ex(jobj_config, "flags", &jobj)) {
+ if (!json_contains(cd, jobj_config, "section", "Config", "flags", json_type_array))
+ return 1;
+
+ /* All array members must be strings */
+ for (i = 0; i < (int) json_object_array_length(jobj); i++)
+ if (!json_object_is_type(json_object_array_get_idx(jobj, i), json_type_string))
+ return 1;
+ }
+
+ return 0;
+}
+
+static bool reencrypt_candidate_flag(const char *flag)
+{
+ const char *ptr;
+
+ assert(flag);
+
+ if (!strcmp(flag, "online-reencrypt"))
+ return true;
+
+ if (strncmp(flag, "online-reencrypt-v", 18))
+ return false;
+
+ ptr = flag + 18;
+ if (!*ptr)
+ return false;
+
+ while (*ptr) {
+ if (!isdigit(*ptr))
+ return false;
+ ptr++;
+ }
+
+ return true;
+}
+
+static int hdr_validate_requirements(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ int i;
+ json_object *jobj_config, *jobj, *jobj1;
+ unsigned online_reencrypt_flag = 0;
+
+ if (!(jobj_config = json_contains(cd, hdr_jobj, "", "JSON area", "config", json_type_object)))
+ return 1;
+
+ /* Requirements object is optional */
+ if (json_object_object_get_ex(jobj_config, "requirements", &jobj)) {
+ if (!json_contains(cd, jobj_config, "section", "Config", "requirements", json_type_object))
+ return 1;
+
+ /* Mandatory array is optional */
+ if (json_object_object_get_ex(jobj, "mandatory", &jobj1)) {
+ if (!json_contains(cd, jobj, "section", "Requirements", "mandatory", json_type_array))
+ return 1;
+
+ /* All array members must be strings */
+ for (i = 0; i < (int) json_object_array_length(jobj1); i++) {
+ if (!json_object_is_type(json_object_array_get_idx(jobj1, i), json_type_string))
+ return 1;
+
+ if (reencrypt_candidate_flag(json_object_get_string(json_object_array_get_idx(jobj1, i))))
+ online_reencrypt_flag++;
+
+ }
+ }
+ }
+
+ if (online_reencrypt_flag > 1) {
+ log_dbg(cd, "Multiple online reencryption requirement flags detected.");
+ return 1;
+ }
+
+ return 0;
+}
+
+int LUKS2_hdr_validate(struct crypt_device *cd, json_object *hdr_jobj, uint64_t json_size)
+{
+ struct {
+ int (*validate)(struct crypt_device *, json_object *);
+ } checks[] = {
+ { hdr_validate_requirements },
+ { hdr_validate_tokens },
+ { hdr_validate_digests },
+ { hdr_validate_segments },
+ { hdr_validate_keyslots },
+ { hdr_validate_config },
+ { hdr_validate_areas },
+ { NULL }
+ };
+ int i;
+
+ if (!hdr_jobj)
+ return 1;
+
+ for (i = 0; checks[i].validate; i++)
+ if (checks[i].validate && checks[i].validate(cd, hdr_jobj))
+ return 1;
+
+ if (hdr_validate_json_size(cd, hdr_jobj, json_size))
+ return 1;
+
+ /* validate keyslot implementations */
+ if (LUKS2_keyslots_validate(cd, hdr_jobj))
+ return 1;
+
+ return 0;
+}
+
+static bool hdr_json_free(json_object **jobj)
+{
+ assert(jobj);
+
+ if (json_object_put(*jobj))
+ *jobj = NULL;
+
+ return (*jobj == NULL);
+}
+
+static int hdr_update_copy_for_rollback(struct crypt_device *cd, struct luks2_hdr *hdr)
+{
+ json_object **jobj_copy;
+
+ assert(hdr);
+ assert(hdr->jobj);
+
+ jobj_copy = (json_object **)&hdr->jobj_rollback;
+
+ if (!hdr_json_free(jobj_copy)) {
+ log_dbg(cd, "LUKS2 rollback metadata copy still in use");
+ return -EINVAL;
+ }
+
+ return json_object_copy(hdr->jobj, jobj_copy) ? -ENOMEM : 0;
+}
+
+/* FIXME: should we expose do_recovery parameter explicitly? */
+int LUKS2_hdr_read(struct crypt_device *cd, struct luks2_hdr *hdr, int repair)
+{
+ int r;
+
+ r = device_read_lock(cd, crypt_metadata_device(cd));
+ if (r) {
+ log_err(cd, _("Failed to acquire read lock on device %s."),
+ device_path(crypt_metadata_device(cd)));
+ return r;
+ }
+
+ r = LUKS2_disk_hdr_read(cd, hdr, crypt_metadata_device(cd), 1, !repair);
+ if (r == -EAGAIN) {
+ /* unlikely: auto-recovery is required and failed due to read lock being held */
+ device_read_unlock(cd, crypt_metadata_device(cd));
+
+ /* Do not use LUKS2_device_write lock. Recovery. */
+ r = device_write_lock(cd, crypt_metadata_device(cd));
+ if (r < 0) {
+ log_err(cd, _("Failed to acquire write lock on device %s."),
+ device_path(crypt_metadata_device(cd)));
+ return r;
+ }
+
+ r = LUKS2_disk_hdr_read(cd, hdr, crypt_metadata_device(cd), 1, !repair);
+
+ device_write_unlock(cd, crypt_metadata_device(cd));
+ } else
+ device_read_unlock(cd, crypt_metadata_device(cd));
+
+ if (!r && (r = hdr_update_copy_for_rollback(cd, hdr)))
+ log_dbg(cd, "Failed to update rollback LUKS2 metadata.");
+
+ return r;
+}
+
+static int hdr_cleanup_and_validate(struct crypt_device *cd, struct luks2_hdr *hdr)
+{
+ LUKS2_digests_erase_unused(cd, hdr);
+
+ return LUKS2_hdr_validate(cd, hdr->jobj, hdr->hdr_size - LUKS2_HDR_BIN_LEN);
+}
+
+int LUKS2_hdr_write_force(struct crypt_device *cd, struct luks2_hdr *hdr)
+{
+ int r;
+
+ if (hdr_cleanup_and_validate(cd, hdr))
+ return -EINVAL;
+
+ r = LUKS2_disk_hdr_write(cd, hdr, crypt_metadata_device(cd), false);
+
+ if (!r && (r = hdr_update_copy_for_rollback(cd, hdr)))
+ log_dbg(cd, "Failed to update rollback LUKS2 metadata.");
+
+ return r;
+}
+
+int LUKS2_hdr_write(struct crypt_device *cd, struct luks2_hdr *hdr)
+{
+ int r;
+
+ if (hdr_cleanup_and_validate(cd, hdr))
+ return -EINVAL;
+
+ r = LUKS2_disk_hdr_write(cd, hdr, crypt_metadata_device(cd), true);
+
+ if (!r && (r = hdr_update_copy_for_rollback(cd, hdr)))
+ log_dbg(cd, "Failed to update rollback LUKS2 metadata.");
+
+ return r;
+}
+
+int LUKS2_hdr_rollback(struct crypt_device *cd, struct luks2_hdr *hdr)
+{
+ json_object **jobj_copy;
+
+ assert(hdr->jobj_rollback);
+
+ log_dbg(cd, "Rolling back in-memory LUKS2 json metadata.");
+
+ jobj_copy = (json_object **)&hdr->jobj;
+
+ if (!hdr_json_free(jobj_copy)) {
+ log_dbg(cd, "LUKS2 header still in use");
+ return -EINVAL;
+ }
+
+ return json_object_copy(hdr->jobj_rollback, jobj_copy) ? -ENOMEM : 0;
+}
+
+int LUKS2_hdr_uuid(struct crypt_device *cd, struct luks2_hdr *hdr, const char *uuid)
+{
+ uuid_t partitionUuid;
+
+ if (uuid && uuid_parse(uuid, partitionUuid) == -1) {
+ log_err(cd, _("Wrong LUKS UUID format provided."));
+ return -EINVAL;
+ }
+ if (!uuid)
+ uuid_generate(partitionUuid);
+
+ uuid_unparse(partitionUuid, hdr->uuid);
+
+ return LUKS2_hdr_write(cd, hdr);
+}
+
+int LUKS2_hdr_labels(struct crypt_device *cd, struct luks2_hdr *hdr,
+ const char *label, const char *subsystem, int commit)
+{
+ //FIXME: check if the labels are the same and skip this.
+
+ memset(hdr->label, 0, LUKS2_LABEL_L);
+ if (label)
+ strncpy(hdr->label, label, LUKS2_LABEL_L-1);
+
+ memset(hdr->subsystem, 0, LUKS2_LABEL_L);
+ if (subsystem)
+ strncpy(hdr->subsystem, subsystem, LUKS2_LABEL_L-1);
+
+ return commit ? LUKS2_hdr_write(cd, hdr) : 0;
+}
+
+void LUKS2_hdr_free(struct crypt_device *cd, struct luks2_hdr *hdr)
+{
+ json_object **jobj;
+
+ assert(hdr);
+
+ jobj = (json_object **)&hdr->jobj;
+
+ if (!hdr_json_free(jobj))
+ log_dbg(cd, "LUKS2 header still in use");
+
+ jobj = (json_object **)&hdr->jobj_rollback;
+
+ if (!hdr_json_free(jobj))
+ log_dbg(cd, "LUKS2 rollback metadata copy still in use");
+}
+
+static uint64_t LUKS2_keyslots_size_jobj(json_object *jobj)
+{
+ json_object *jobj1, *jobj2;
+ uint64_t keyslots_size;
+
+ json_object_object_get_ex(jobj, "config", &jobj1);
+ json_object_object_get_ex(jobj1, "keyslots_size", &jobj2);
+ json_str_to_uint64(jobj2, &keyslots_size);
+
+ return keyslots_size;
+}
+
+uint64_t LUKS2_keyslots_size(struct luks2_hdr *hdr)
+{
+ return LUKS2_keyslots_size_jobj(hdr->jobj);
+}
+
+uint64_t LUKS2_hdr_and_areas_size_jobj(json_object *jobj)
+{
+ return 2 * LUKS2_metadata_size_jobj(jobj) + LUKS2_keyslots_size_jobj(jobj);
+}
+
+uint64_t LUKS2_hdr_and_areas_size(struct luks2_hdr *hdr)
+{
+ return LUKS2_hdr_and_areas_size_jobj(hdr->jobj);
+}
+
+int LUKS2_hdr_backup(struct crypt_device *cd, struct luks2_hdr *hdr,
+ const char *backup_file)
+{
+ struct device *device = crypt_metadata_device(cd);
+ int fd, devfd, r = 0;
+ ssize_t hdr_size;
+ ssize_t ret, buffer_size;
+ char *buffer = NULL;
+
+ hdr_size = LUKS2_hdr_and_areas_size(hdr);
+ buffer_size = size_round_up(hdr_size, crypt_getpagesize());
+
+ buffer = malloc(buffer_size);
+ if (!buffer)
+ return -ENOMEM;
+
+ log_dbg(cd, "Storing backup of header (%zu bytes).", hdr_size);
+ log_dbg(cd, "Output backup file size: %zu bytes.", buffer_size);
+
+ r = device_read_lock(cd, device);
+ if (r) {
+ log_err(cd, _("Failed to acquire read lock on device %s."),
+ device_path(crypt_metadata_device(cd)));
+ goto out;
+ }
+
+ devfd = device_open_locked(cd, device, O_RDONLY);
+ if (devfd < 0) {
+ device_read_unlock(cd, device);
+ log_err(cd, _("Device %s is not a valid LUKS device."), device_path(device));
+ r = (devfd == -1) ? -EINVAL : devfd;
+ goto out;
+ }
+
+ if (read_lseek_blockwise(devfd, device_block_size(cd, device),
+ device_alignment(device), buffer, hdr_size, 0) < hdr_size) {
+ device_read_unlock(cd, device);
+ r = -EIO;
+ goto out;
+ }
+
+ device_read_unlock(cd, device);
+
+ fd = open(backup_file, O_CREAT|O_EXCL|O_WRONLY, S_IRUSR);
+ if (fd == -1) {
+ if (errno == EEXIST)
+ log_err(cd, _("Requested header backup file %s already exists."), backup_file);
+ else
+ log_err(cd, _("Cannot create header backup file %s."), backup_file);
+ r = -EINVAL;
+ goto out;
+ }
+ ret = write_buffer(fd, buffer, buffer_size);
+ close(fd);
+ if (ret < buffer_size) {
+ log_err(cd, _("Cannot write header backup file %s."), backup_file);
+ r = -EIO;
+ } else
+ r = 0;
+out:
+ crypt_safe_memzero(buffer, buffer_size);
+ free(buffer);
+ return r;
+}
+
+int LUKS2_hdr_restore(struct crypt_device *cd, struct luks2_hdr *hdr,
+ const char *backup_file)
+{
+ struct device *backup_device, *device = crypt_metadata_device(cd);
+ int r, fd, devfd = -1, diff_uuid = 0;
+ ssize_t ret, buffer_size = 0;
+ char *buffer = NULL, msg[1024];
+ struct luks2_hdr hdr_file = {}, tmp_hdr = {};
+ uint32_t reqs = 0;
+
+ r = device_alloc(cd, &backup_device, backup_file);
+ if (r < 0)
+ return r;
+
+ r = device_read_lock(cd, backup_device);
+ if (r) {
+ log_err(cd, _("Failed to acquire read lock on device %s."),
+ device_path(backup_device));
+ device_free(cd, backup_device);
+ return r;
+ }
+
+ r = LUKS2_disk_hdr_read(cd, &hdr_file, backup_device, 0, 0);
+ device_read_unlock(cd, backup_device);
+ device_free(cd, backup_device);
+
+ if (r < 0) {
+ log_err(cd, _("Backup file does not contain valid LUKS header."));
+ goto out;
+ }
+
+ /* do not allow header restore from backup with unmet requirements */
+ if (LUKS2_unmet_requirements(cd, &hdr_file, CRYPT_REQUIREMENT_ONLINE_REENCRYPT, 1)) {
+ log_err(cd, _("Forbidden LUKS2 requirements detected in backup %s."),
+ backup_file);
+ r = -ETXTBSY;
+ goto out;
+ }
+
+ buffer_size = LUKS2_hdr_and_areas_size(&hdr_file);
+ buffer = malloc(buffer_size);
+ if (!buffer) {
+ r = -ENOMEM;
+ goto out;
+ }
+
+ fd = open(backup_file, O_RDONLY);
+ if (fd == -1) {
+ log_err(cd, _("Cannot open header backup file %s."), backup_file);
+ r = -EINVAL;
+ goto out;
+ }
+
+ ret = read_buffer(fd, buffer, buffer_size);
+ close(fd);
+ if (ret < buffer_size) {
+ log_err(cd, _("Cannot read header backup file %s."), backup_file);
+ r = -EIO;
+ goto out;
+ }
+
+ r = LUKS2_hdr_read(cd, &tmp_hdr, 0);
+ if (r == 0) {
+ log_dbg(cd, "Device %s already contains LUKS2 header, checking UUID and requirements.", device_path(device));
+ r = LUKS2_config_get_requirements(cd, &tmp_hdr, &reqs);
+ if (r)
+ goto out;
+
+ if (memcmp(tmp_hdr.uuid, hdr_file.uuid, LUKS2_UUID_L))
+ diff_uuid = 1;
+
+ if (!reqs_reencrypt(reqs)) {
+ log_dbg(cd, "Checking LUKS2 header size and offsets.");
+ if (LUKS2_get_data_offset(&tmp_hdr) != LUKS2_get_data_offset(&hdr_file)) {
+ log_err(cd, _("Data offset differ on device and backup, restore failed."));
+ r = -EINVAL;
+ goto out;
+ }
+ /* FIXME: what could go wrong? Erase if we're fine with consequences */
+ if (buffer_size != (ssize_t) LUKS2_hdr_and_areas_size(&tmp_hdr)) {
+ log_err(cd, _("Binary header with keyslot areas size differ on device and backup, restore failed."));
+ r = -EINVAL;
+ goto out;
+ }
+ }
+ }
+
+ r = snprintf(msg, sizeof(msg), _("Device %s %s%s%s%s"), device_path(device),
+ r ? _("does not contain LUKS2 header. Replacing header can destroy data on that device.") :
+ _("already contains LUKS2 header. Replacing header will destroy existing keyslots."),
+ diff_uuid ? _("\nWARNING: real device header has different UUID than backup!") : "",
+ reqs_unknown(reqs) ? _("\nWARNING: unknown LUKS2 requirements detected in real device header!"
+ "\nReplacing header with backup may corrupt the data on that device!") : "",
+ reqs_reencrypt(reqs) ? _("\nWARNING: Unfinished offline reencryption detected on the device!"
+ "\nReplacing header with backup may corrupt data.") : "");
+ if (r < 0 || (size_t) r >= sizeof(msg)) {
+ r = -ENOMEM;
+ goto out;
+ }
+
+ if (!crypt_confirm(cd, msg)) {
+ r = -EINVAL;
+ goto out;
+ }
+
+ log_dbg(cd, "Storing backup of header (%zu bytes) to device %s.", buffer_size, device_path(device));
+
+ /* Do not use LUKS2_device_write lock for checking sequence id on restore */
+ r = device_write_lock(cd, device);
+ if (r < 0) {
+ log_err(cd, _("Failed to acquire write lock on device %s."),
+ device_path(device));
+ goto out;
+ }
+
+ devfd = device_open_locked(cd, device, O_RDWR);
+ if (devfd < 0) {
+ if (errno == EACCES)
+ log_err(cd, _("Cannot write to device %s, permission denied."),
+ device_path(device));
+ else
+ log_err(cd, _("Cannot open device %s."), device_path(device));
+ device_write_unlock(cd, device);
+ r = -EINVAL;
+ goto out;
+ }
+
+ if (write_lseek_blockwise(devfd, device_block_size(cd, device),
+ device_alignment(device), buffer, buffer_size, 0) < buffer_size)
+ r = -EIO;
+ else
+ r = 0;
+
+ device_write_unlock(cd, device);
+out:
+ LUKS2_hdr_free(cd, hdr);
+ LUKS2_hdr_free(cd, &hdr_file);
+ LUKS2_hdr_free(cd, &tmp_hdr);
+ crypt_safe_memzero(&hdr_file, sizeof(hdr_file));
+ crypt_safe_memzero(&tmp_hdr, sizeof(tmp_hdr));
+ crypt_safe_memzero(buffer, buffer_size);
+ free(buffer);
+ device_sync(cd, device);
+ return r;
+}
+
+/*
+ * Persistent config flags
+ */
+static const struct {
+ uint32_t flag;
+ const char *description;
+} persistent_flags[] = {
+ { CRYPT_ACTIVATE_ALLOW_DISCARDS, "allow-discards" },
+ { CRYPT_ACTIVATE_SAME_CPU_CRYPT, "same-cpu-crypt" },
+ { CRYPT_ACTIVATE_SUBMIT_FROM_CRYPT_CPUS, "submit-from-crypt-cpus" },
+ { CRYPT_ACTIVATE_NO_JOURNAL, "no-journal" },
+ { CRYPT_ACTIVATE_NO_READ_WORKQUEUE, "no-read-workqueue" },
+ { CRYPT_ACTIVATE_NO_WRITE_WORKQUEUE, "no-write-workqueue" },
+ { 0, NULL }
+};
+
+int LUKS2_config_get_flags(struct crypt_device *cd, struct luks2_hdr *hdr, uint32_t *flags)
+{
+ json_object *jobj1, *jobj_config, *jobj_flags;
+ int i, j, found;
+
+ if (!hdr || !flags)
+ return -EINVAL;
+
+ *flags = 0;
+
+ if (!json_object_object_get_ex(hdr->jobj, "config", &jobj_config))
+ return 0;
+
+ if (!json_object_object_get_ex(jobj_config, "flags", &jobj_flags))
+ return 0;
+
+ for (i = 0; i < (int) json_object_array_length(jobj_flags); i++) {
+ jobj1 = json_object_array_get_idx(jobj_flags, i);
+ found = 0;
+ for (j = 0; persistent_flags[j].description && !found; j++)
+ if (!strcmp(persistent_flags[j].description,
+ json_object_get_string(jobj1))) {
+ *flags |= persistent_flags[j].flag;
+ log_dbg(cd, "Using persistent flag %s.",
+ json_object_get_string(jobj1));
+ found = 1;
+ }
+ if (!found)
+ log_verbose(cd, _("Ignored unknown flag %s."),
+ json_object_get_string(jobj1));
+ }
+
+ return 0;
+}
+
+int LUKS2_config_set_flags(struct crypt_device *cd, struct luks2_hdr *hdr, uint32_t flags)
+{
+ json_object *jobj_config, *jobj_flags;
+ int i;
+
+ if (!json_object_object_get_ex(hdr->jobj, "config", &jobj_config))
+ return 0;
+
+ jobj_flags = json_object_new_array();
+
+ for (i = 0; persistent_flags[i].description; i++) {
+ if (flags & persistent_flags[i].flag) {
+ log_dbg(cd, "Setting persistent flag: %s.", persistent_flags[i].description);
+ json_object_array_add(jobj_flags,
+ json_object_new_string(persistent_flags[i].description));
+ }
+ }
+
+ /* Replace or add new flags array */
+ json_object_object_add(jobj_config, "flags", jobj_flags);
+
+ return LUKS2_hdr_write(cd, hdr);
+}
+
+/*
+ * json format example (mandatory array must not be ignored,
+ * all other future fields may be added later)
+ *
+ * "requirements": {
+ * mandatory : [],
+ * optional0 : [],
+ * optional1 : "lala"
+ * }
+ */
+
+/* LUKS2 library requirements */
+struct requirement_flag {
+ uint32_t flag;
+ uint8_t version;
+ const char *description;
+};
+
+static const struct requirement_flag unknown_requirement_flag = { CRYPT_REQUIREMENT_UNKNOWN, 0, NULL };
+
+static const struct requirement_flag requirements_flags[] = {
+ { CRYPT_REQUIREMENT_OFFLINE_REENCRYPT,1, "offline-reencrypt" },
+ { CRYPT_REQUIREMENT_ONLINE_REENCRYPT, 2, "online-reencrypt-v2" },
+ { CRYPT_REQUIREMENT_ONLINE_REENCRYPT, 3, "online-reencrypt-v3" },
+ { CRYPT_REQUIREMENT_ONLINE_REENCRYPT, 1, "online-reencrypt" },
+ { 0, 0, NULL }
+};
+
+static const struct requirement_flag *get_requirement_by_name(const char *requirement)
+{
+ int i;
+
+ for (i = 0; requirements_flags[i].description; i++)
+ if (!strcmp(requirement, requirements_flags[i].description))
+ return requirements_flags + i;
+
+ return &unknown_requirement_flag;
+}
+
+static json_object *mandatory_requirements_jobj(struct luks2_hdr *hdr)
+{
+ json_object *jobj_config, *jobj_requirements, *jobj_mandatory;
+
+ assert(hdr);
+
+ if (!json_object_object_get_ex(hdr->jobj, "config", &jobj_config))
+ return NULL;
+
+ if (!json_object_object_get_ex(jobj_config, "requirements", &jobj_requirements))
+ return NULL;
+
+ if (!json_object_object_get_ex(jobj_requirements, "mandatory", &jobj_mandatory))
+ return NULL;
+
+ return jobj_mandatory;
+}
+
+bool LUKS2_reencrypt_requirement_candidate(struct luks2_hdr *hdr)
+{
+ json_object *jobj_mandatory;
+ int i, len;
+
+ assert(hdr);
+
+ jobj_mandatory = mandatory_requirements_jobj(hdr);
+ if (!jobj_mandatory)
+ return false;
+
+ len = (int) json_object_array_length(jobj_mandatory);
+ if (len <= 0)
+ return false;
+
+ for (i = 0; i < len; i++) {
+ if (reencrypt_candidate_flag(json_object_get_string(json_object_array_get_idx(jobj_mandatory, i))))
+ return true;
+ }
+
+ return false;
+}
+
+int LUKS2_config_get_reencrypt_version(struct luks2_hdr *hdr, uint8_t *version)
+{
+ json_object *jobj_mandatory, *jobj;
+ int i, len;
+ const struct requirement_flag *req;
+
+ assert(hdr);
+ assert(version);
+
+ jobj_mandatory = mandatory_requirements_jobj(hdr);
+ if (!jobj_mandatory)
+ return -ENOENT;
+
+ len = (int) json_object_array_length(jobj_mandatory);
+ if (len <= 0)
+ return -ENOENT;
+
+ for (i = 0; i < len; i++) {
+ jobj = json_object_array_get_idx(jobj_mandatory, i);
+
+ /* search for requirements prefixed with "online-reencrypt" */
+ if (strncmp(json_object_get_string(jobj), "online-reencrypt", 16))
+ continue;
+
+ /* check current library is aware of the requirement */
+ req = get_requirement_by_name(json_object_get_string(jobj));
+ if (req->flag == CRYPT_REQUIREMENT_UNKNOWN)
+ continue;
+
+ *version = req->version;
+
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+static const struct requirement_flag *stored_requirement_name_by_id(struct crypt_device *cd, struct luks2_hdr *hdr, uint32_t req_id)
+{
+ json_object *jobj_mandatory, *jobj;
+ int i, len;
+ const struct requirement_flag *req;
+
+ assert(hdr);
+
+ jobj_mandatory = mandatory_requirements_jobj(hdr);
+ if (!jobj_mandatory)
+ return NULL;
+
+ len = (int) json_object_array_length(jobj_mandatory);
+ if (len <= 0)
+ return NULL;
+
+ for (i = 0; i < len; i++) {
+ jobj = json_object_array_get_idx(jobj_mandatory, i);
+ req = get_requirement_by_name(json_object_get_string(jobj));
+ if (req->flag == req_id)
+ return req;
+ }
+
+ return NULL;
+}
+
+/*
+ * returns count of requirements (past cryptsetup 2.0 release)
+ */
+int LUKS2_config_get_requirements(struct crypt_device *cd, struct luks2_hdr *hdr, uint32_t *reqs)
+{
+ json_object *jobj_mandatory, *jobj;
+ int i, len;
+ const struct requirement_flag *req;
+
+ assert(hdr);
+ assert(reqs);
+
+ *reqs = 0;
+
+ jobj_mandatory = mandatory_requirements_jobj(hdr);
+ if (!jobj_mandatory)
+ return 0;
+
+ len = (int) json_object_array_length(jobj_mandatory);
+ if (len <= 0)
+ return 0;
+
+ log_dbg(cd, "LUKS2 requirements detected:");
+
+ for (i = 0; i < len; i++) {
+ jobj = json_object_array_get_idx(jobj_mandatory, i);
+ req = get_requirement_by_name(json_object_get_string(jobj));
+ log_dbg(cd, "%s - %sknown", json_object_get_string(jobj),
+ reqs_unknown(req->flag) ? "un" : "");
+ *reqs |= req->flag;
+ }
+
+ return 0;
+}
+
+int LUKS2_config_set_requirements(struct crypt_device *cd, struct luks2_hdr *hdr, uint32_t reqs, bool commit)
+{
+ json_object *jobj_config, *jobj_requirements, *jobj_mandatory, *jobj;
+ int i, r = -EINVAL;
+ const struct requirement_flag *req;
+ uint32_t req_id;
+
+ if (!hdr)
+ return -EINVAL;
+
+ jobj_mandatory = json_object_new_array();
+ if (!jobj_mandatory)
+ return -ENOMEM;
+
+ for (i = 0; requirements_flags[i].description; i++) {
+ req_id = reqs & requirements_flags[i].flag;
+ if (req_id) {
+ /* retain already stored version of requirement flag */
+ req = stored_requirement_name_by_id(cd, hdr, req_id);
+ if (req)
+ jobj = json_object_new_string(req->description);
+ else
+ jobj = json_object_new_string(requirements_flags[i].description);
+ if (!jobj) {
+ r = -ENOMEM;
+ goto err;
+ }
+ json_object_array_add(jobj_mandatory, jobj);
+ /* erase processed flag from input set */
+ reqs &= ~(requirements_flags[i].flag);
+ }
+ }
+
+ /* any remaining bit in requirements is unknown therefore illegal */
+ if (reqs) {
+ log_dbg(cd, "Illegal requirement flag(s) requested");
+ goto err;
+ }
+
+ if (!json_object_object_get_ex(hdr->jobj, "config", &jobj_config))
+ goto err;
+
+ if (!json_object_object_get_ex(jobj_config, "requirements", &jobj_requirements)) {
+ jobj_requirements = json_object_new_object();
+ if (!jobj_requirements) {
+ r = -ENOMEM;
+ goto err;
+ }
+ json_object_object_add(jobj_config, "requirements", jobj_requirements);
+ }
+
+ if (json_object_array_length(jobj_mandatory) > 0) {
+ /* replace mandatory field with new values */
+ json_object_object_add(jobj_requirements, "mandatory", jobj_mandatory);
+ } else {
+ /* new mandatory field was empty, delete old one */
+ json_object_object_del(jobj_requirements, "mandatory");
+ json_object_put(jobj_mandatory);
+ }
+
+ /* remove empty requirements object */
+ if (!json_object_object_length(jobj_requirements))
+ json_object_object_del(jobj_config, "requirements");
+
+ return commit ? LUKS2_hdr_write(cd, hdr) : 0;
+err:
+ json_object_put(jobj_mandatory);
+ return r;
+}
+
+static json_object *LUKS2_get_mandatory_requirements_filtered_jobj(struct luks2_hdr *hdr,
+ uint32_t filter_req_ids)
+{
+ int i, len;
+ const struct requirement_flag *req;
+ json_object *jobj_mandatory, *jobj_mandatory_filtered, *jobj;
+
+ jobj_mandatory_filtered = json_object_new_array();
+ if (!jobj_mandatory_filtered)
+ return NULL;
+
+ jobj_mandatory = mandatory_requirements_jobj(hdr);
+ if (!jobj_mandatory)
+ return jobj_mandatory_filtered;
+
+ len = (int) json_object_array_length(jobj_mandatory);
+
+ for (i = 0; i < len; i++) {
+ jobj = json_object_array_get_idx(jobj_mandatory, i);
+ req = get_requirement_by_name(json_object_get_string(jobj));
+ if (req->flag == CRYPT_REQUIREMENT_UNKNOWN || req->flag & filter_req_ids)
+ continue;
+ json_object_array_add(jobj_mandatory_filtered,
+ json_object_new_string(req->description));
+ }
+
+ return jobj_mandatory_filtered;
+}
+
+/*
+ * The function looks for specific version of requirement id.
+ * If it can't be fulfilled function fails.
+ */
+int LUKS2_config_set_requirement_version(struct crypt_device *cd,
+ struct luks2_hdr *hdr,
+ uint32_t req_id,
+ uint8_t req_version,
+ bool commit)
+{
+ json_object *jobj_config, *jobj_requirements, *jobj_mandatory;
+ const struct requirement_flag *req;
+ int r = -EINVAL;
+
+ if (!hdr || req_id == CRYPT_REQUIREMENT_UNKNOWN)
+ return -EINVAL;
+
+ req = requirements_flags;
+
+ while (req->description) {
+ /* we have a match */
+ if (req->flag == req_id && req->version == req_version)
+ break;
+ req++;
+ }
+
+ if (!req->description)
+ return -EINVAL;
+
+ /*
+ * Creates copy of mandatory requirements set without specific requirement
+ * (no matter the version) we want to set.
+ */
+ jobj_mandatory = LUKS2_get_mandatory_requirements_filtered_jobj(hdr, req_id);
+ if (!jobj_mandatory)
+ return -ENOMEM;
+
+ json_object_array_add(jobj_mandatory, json_object_new_string(req->description));
+
+ if (!json_object_object_get_ex(hdr->jobj, "config", &jobj_config))
+ goto err;
+
+ if (!json_object_object_get_ex(jobj_config, "requirements", &jobj_requirements)) {
+ jobj_requirements = json_object_new_object();
+ if (!jobj_requirements) {
+ r = -ENOMEM;
+ goto err;
+ }
+ json_object_object_add(jobj_config, "requirements", jobj_requirements);
+ }
+
+ json_object_object_add(jobj_requirements, "mandatory", jobj_mandatory);
+
+ return commit ? LUKS2_hdr_write(cd, hdr) : 0;
+err:
+ json_object_put(jobj_mandatory);
+ return r;
+}
+
+/*
+ * Header dump
+ */
+static void hdr_dump_config(struct crypt_device *cd, json_object *hdr_jobj)
+{
+
+ json_object *jobj1, *jobj_config, *jobj_flags, *jobj_requirements, *jobj_mandatory;
+ int i = 0, flags = 0, reqs = 0;
+
+ log_std(cd, "Flags: \t");
+
+ if (json_object_object_get_ex(hdr_jobj, "config", &jobj_config)) {
+ if (json_object_object_get_ex(jobj_config, "flags", &jobj_flags))
+ flags = (int) json_object_array_length(jobj_flags);
+ if (json_object_object_get_ex(jobj_config, "requirements", &jobj_requirements) &&
+ json_object_object_get_ex(jobj_requirements, "mandatory", &jobj_mandatory))
+ reqs = (int) json_object_array_length(jobj_mandatory);
+ }
+
+ for (i = 0; i < flags; i++) {
+ jobj1 = json_object_array_get_idx(jobj_flags, i);
+ log_std(cd, "%s ", json_object_get_string(jobj1));
+ }
+
+ log_std(cd, "%s\n%s", flags > 0 ? "" : "(no flags)", reqs > 0 ? "" : "\n");
+
+ if (reqs > 0) {
+ log_std(cd, "Requirements:\t");
+ for (i = 0; i < reqs; i++) {
+ jobj1 = json_object_array_get_idx(jobj_mandatory, i);
+ log_std(cd, "%s ", json_object_get_string(jobj1));
+ }
+ log_std(cd, "\n\n");
+ }
+}
+
+static const char *get_priority_desc(json_object *jobj)
+{
+ crypt_keyslot_priority priority;
+ json_object *jobj_priority;
+ const char *text;
+
+ if (json_object_object_get_ex(jobj, "priority", &jobj_priority))
+ priority = (crypt_keyslot_priority)(int)json_object_get_int(jobj_priority);
+ else
+ priority = CRYPT_SLOT_PRIORITY_NORMAL;
+
+ switch (priority) {
+ case CRYPT_SLOT_PRIORITY_IGNORE: text = "ignored"; break;
+ case CRYPT_SLOT_PRIORITY_PREFER: text = "preferred"; break;
+ case CRYPT_SLOT_PRIORITY_NORMAL: text = "normal"; break;
+ default: text = "invalid";
+ }
+
+ return text;
+}
+
+static void hdr_dump_keyslots(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ char slot[16];
+ json_object *keyslots_jobj, *digests_jobj, *jobj2, *jobj3, *val;
+ const char *tmps;
+ int i, j, r;
+
+ log_std(cd, "Keyslots:\n");
+ json_object_object_get_ex(hdr_jobj, "keyslots", &keyslots_jobj);
+
+ for (j = 0; j < LUKS2_KEYSLOTS_MAX; j++) {
+ if (snprintf(slot, sizeof(slot), "%i", j) < 0)
+ slot[0] = '\0';
+ json_object_object_get_ex(keyslots_jobj, slot, &val);
+ if (!val)
+ continue;
+
+ json_object_object_get_ex(val, "type", &jobj2);
+ tmps = json_object_get_string(jobj2);
+
+ r = LUKS2_keyslot_for_segment(crypt_get_hdr(cd, CRYPT_LUKS2), j, CRYPT_ONE_SEGMENT);
+ log_std(cd, " %s: %s%s\n", slot, tmps, r == -ENOENT ? " (unbound)" : "");
+
+ if (json_object_object_get_ex(val, "key_size", &jobj2))
+ log_std(cd, "\tKey: %u bits\n", crypt_jobj_get_uint32(jobj2) * 8);
+
+ log_std(cd, "\tPriority: %s\n", get_priority_desc(val));
+
+ LUKS2_keyslot_dump(cd, j);
+
+ json_object_object_get_ex(hdr_jobj, "digests", &digests_jobj);
+ json_object_object_foreach(digests_jobj, key2, val2) {
+ json_object_object_get_ex(val2, "keyslots", &jobj2);
+ for (i = 0; i < (int) json_object_array_length(jobj2); i++) {
+ jobj3 = json_object_array_get_idx(jobj2, i);
+ if (!strcmp(slot, json_object_get_string(jobj3))) {
+ log_std(cd, "\tDigest ID: %s\n", key2);
+ }
+ }
+ }
+ }
+}
+
+static void hdr_dump_tokens(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ char token[16];
+ json_object *tokens_jobj, *jobj2, *jobj3, *val;
+ const char *tmps;
+ int i, j;
+
+ log_std(cd, "Tokens:\n");
+ json_object_object_get_ex(hdr_jobj, "tokens", &tokens_jobj);
+
+ for (j = 0; j < LUKS2_TOKENS_MAX; j++) {
+ if (snprintf(token, sizeof(token), "%i", j) < 0)
+ token[0] = '\0';
+ json_object_object_get_ex(tokens_jobj, token, &val);
+ if (!val)
+ continue;
+
+ json_object_object_get_ex(val, "type", &jobj2);
+ tmps = json_object_get_string(jobj2);
+ log_std(cd, " %s: %s\n", token, tmps);
+
+ LUKS2_token_dump(cd, j);
+
+ json_object_object_get_ex(val, "keyslots", &jobj2);
+ for (i = 0; i < (int) json_object_array_length(jobj2); i++) {
+ jobj3 = json_object_array_get_idx(jobj2, i);
+ log_std(cd, "\tKeyslot: %s\n", json_object_get_string(jobj3));
+ }
+ }
+}
+
+static void hdr_dump_segments(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ char segment[16];
+ json_object *jobj_segments, *jobj_segment, *jobj1, *jobj2;
+ int i, j, flags;
+ uint64_t value;
+
+ log_std(cd, "Data segments:\n");
+ json_object_object_get_ex(hdr_jobj, "segments", &jobj_segments);
+
+ for (i = 0; i < LUKS2_SEGMENT_MAX; i++) {
+ if (snprintf(segment, sizeof(segment), "%i", i) < 0)
+ segment[0] = '\0';
+ if (!json_object_object_get_ex(jobj_segments, segment, &jobj_segment))
+ continue;
+
+ json_object_object_get_ex(jobj_segment, "type", &jobj1);
+ log_std(cd, " %s: %s\n", segment, json_object_get_string(jobj1));
+
+ json_object_object_get_ex(jobj_segment, "offset", &jobj1);
+ json_str_to_uint64(jobj1, &value);
+ log_std(cd, "\toffset: %" PRIu64 " [bytes]\n", value);
+
+ json_object_object_get_ex(jobj_segment, "size", &jobj1);
+ if (!(strcmp(json_object_get_string(jobj1), "dynamic")))
+ log_std(cd, "\tlength: (whole device)\n");
+ else {
+ json_str_to_uint64(jobj1, &value);
+ log_std(cd, "\tlength: %" PRIu64 " [bytes]\n", value);
+ }
+
+ if (json_object_object_get_ex(jobj_segment, "encryption", &jobj1))
+ log_std(cd, "\tcipher: %s\n", json_object_get_string(jobj1));
+
+ if (json_object_object_get_ex(jobj_segment, "sector_size", &jobj1))
+ log_std(cd, "\tsector: %" PRIu32 " [bytes]\n", crypt_jobj_get_uint32(jobj1));
+
+ if (json_object_object_get_ex(jobj_segment, "integrity", &jobj1) &&
+ json_object_object_get_ex(jobj1, "type", &jobj2))
+ log_std(cd, "\tintegrity: %s\n", json_object_get_string(jobj2));
+
+ if (json_object_object_get_ex(jobj_segment, "flags", &jobj1) &&
+ (flags = (int)json_object_array_length(jobj1)) > 0) {
+ jobj2 = json_object_array_get_idx(jobj1, 0);
+ log_std(cd, "\tflags : %s", json_object_get_string(jobj2));
+ for (j = 1; j < flags; j++) {
+ jobj2 = json_object_array_get_idx(jobj1, j);
+ log_std(cd, ", %s", json_object_get_string(jobj2));
+ }
+ log_std(cd, "\n");
+ }
+
+ log_std(cd, "\n");
+ }
+}
+
+static void hdr_dump_digests(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ char key[16];
+ json_object *jobj1, *jobj2, *val;
+ const char *tmps;
+ int i;
+
+ log_std(cd, "Digests:\n");
+ json_object_object_get_ex(hdr_jobj, "digests", &jobj1);
+
+ for (i = 0; i < LUKS2_DIGEST_MAX; i++) {
+ if (snprintf(key, sizeof(key), "%i", i) < 0)
+ key[0] = '\0';
+ json_object_object_get_ex(jobj1, key, &val);
+ if (!val)
+ continue;
+
+ json_object_object_get_ex(val, "type", &jobj2);
+ tmps = json_object_get_string(jobj2);
+ log_std(cd, " %s: %s\n", key, tmps);
+
+ LUKS2_digest_dump(cd, i);
+ }
+}
+
+int LUKS2_hdr_dump(struct crypt_device *cd, struct luks2_hdr *hdr)
+{
+ if (!hdr->jobj)
+ return -EINVAL;
+
+ JSON_DBG(cd, hdr->jobj, NULL);
+
+ log_std(cd, "LUKS header information\n");
+ log_std(cd, "Version: \t%u\n", hdr->version);
+ log_std(cd, "Epoch: \t%" PRIu64 "\n", hdr->seqid);
+ log_std(cd, "Metadata area: \t%" PRIu64 " [bytes]\n", LUKS2_metadata_size(hdr));
+ log_std(cd, "Keyslots area: \t%" PRIu64 " [bytes]\n", LUKS2_keyslots_size(hdr));
+ log_std(cd, "UUID: \t%s\n", *hdr->uuid ? hdr->uuid : "(no UUID)");
+ log_std(cd, "Label: \t%s\n", *hdr->label ? hdr->label : "(no label)");
+ log_std(cd, "Subsystem: \t%s\n", *hdr->subsystem ? hdr->subsystem : "(no subsystem)");
+
+ hdr_dump_config(cd, hdr->jobj);
+ hdr_dump_segments(cd, hdr->jobj);
+ hdr_dump_keyslots(cd, hdr->jobj);
+ hdr_dump_tokens(cd, hdr->jobj);
+ hdr_dump_digests(cd, hdr->jobj);
+
+ return 0;
+}
+
+int LUKS2_hdr_dump_json(struct crypt_device *cd, struct luks2_hdr *hdr, const char **json)
+{
+ const char *json_buf;
+
+ json_buf = json_object_to_json_string_ext(hdr->jobj,
+ JSON_C_TO_STRING_PRETTY | JSON_C_TO_STRING_NOSLASHESCAPE);
+
+ if (!json_buf)
+ return -EINVAL;
+
+ if (json)
+ *json = json_buf;
+ else
+ crypt_log(cd, CRYPT_LOG_NORMAL, json_buf);
+
+ return 0;
+}
+
+int LUKS2_get_data_size(struct luks2_hdr *hdr, uint64_t *size, bool *dynamic)
+{
+ int i, len, sector_size;
+ json_object *jobj_segments, *jobj_segment, *jobj_size;
+ uint64_t tmp = 0;
+
+ if (!size || !json_object_object_get_ex(hdr->jobj, "segments", &jobj_segments))
+ return -EINVAL;
+
+ len = json_object_object_length(jobj_segments);
+
+ for (i = 0; i < len; i++) {
+ if (!(jobj_segment = json_segments_get_segment(jobj_segments, i)))
+ return -EINVAL;
+
+ if (json_segment_is_backup(jobj_segment))
+ break;
+
+ json_object_object_get_ex(jobj_segment, "size", &jobj_size);
+ if (!strcmp(json_object_get_string(jobj_size), "dynamic")) {
+ sector_size = json_segment_get_sector_size(jobj_segment);
+ /* last dynamic segment must have at least one sector in size */
+ if (tmp)
+ *size = tmp + (sector_size > 0 ? sector_size : SECTOR_SIZE);
+ else
+ *size = 0;
+ if (dynamic)
+ *dynamic = true;
+ return 0;
+ }
+
+ tmp += crypt_jobj_get_uint64(jobj_size);
+ }
+
+ /* impossible, real device size must not be zero */
+ if (!tmp)
+ return -EINVAL;
+
+ *size = tmp;
+ if (dynamic)
+ *dynamic = false;
+ return 0;
+}
+
+uint64_t LUKS2_get_data_offset(struct luks2_hdr *hdr)
+{
+ crypt_reencrypt_info ri;
+ json_object *jobj;
+
+ ri = LUKS2_reencrypt_status(hdr);
+ if (ri == CRYPT_REENCRYPT_CLEAN || ri == CRYPT_REENCRYPT_CRASH) {
+ jobj = LUKS2_get_segment_by_flag(hdr, "backup-final");
+ if (jobj)
+ return json_segment_get_offset(jobj, 1);
+ }
+
+ return json_segments_get_minimal_offset(LUKS2_get_segments_jobj(hdr), 1);
+}
+
+const char *LUKS2_get_cipher(struct luks2_hdr *hdr, int segment)
+{
+ json_object *jobj_segment;
+
+ if (!hdr)
+ return NULL;
+
+ if (segment == CRYPT_DEFAULT_SEGMENT)
+ segment = LUKS2_get_default_segment(hdr);
+
+ jobj_segment = json_segments_get_segment(json_get_segments_jobj(hdr->jobj), segment);
+ if (!jobj_segment)
+ return NULL;
+
+ /* FIXME: default encryption (for other segment types) must be string here. */
+ return json_segment_get_cipher(jobj_segment) ?: "null";
+}
+
+crypt_reencrypt_info LUKS2_reencrypt_status(struct luks2_hdr *hdr)
+{
+ uint32_t reqs;
+
+ /*
+ * Any unknown requirement or offline reencryption should abort
+ * anything related to online-reencryption handling
+ */
+ if (LUKS2_config_get_requirements(NULL, hdr, &reqs))
+ return CRYPT_REENCRYPT_INVALID;
+
+ if (!reqs_reencrypt_online(reqs))
+ return CRYPT_REENCRYPT_NONE;
+
+ if (json_segments_segment_in_reencrypt(LUKS2_get_segments_jobj(hdr)) < 0)
+ return CRYPT_REENCRYPT_CLEAN;
+
+ return CRYPT_REENCRYPT_CRASH;
+}
+
+const char *LUKS2_get_keyslot_cipher(struct luks2_hdr *hdr, int keyslot, size_t *key_size)
+{
+ json_object *jobj_keyslot, *jobj_area, *jobj1;
+
+ jobj_keyslot = LUKS2_get_keyslot_jobj(hdr, keyslot);
+ if (!jobj_keyslot)
+ return NULL;
+
+ if (!json_object_object_get_ex(jobj_keyslot, "area", &jobj_area))
+ return NULL;
+
+ /* currently we only support raw length preserving area encryption */
+ json_object_object_get_ex(jobj_area, "type", &jobj1);
+ if (strcmp(json_object_get_string(jobj1), "raw"))
+ return NULL;
+
+ if (!json_object_object_get_ex(jobj_area, "key_size", &jobj1))
+ return NULL;
+ *key_size = json_object_get_int(jobj1);
+
+ if (!json_object_object_get_ex(jobj_area, "encryption", &jobj1))
+ return NULL;
+
+ return json_object_get_string(jobj1);
+}
+
+const char *LUKS2_get_integrity(struct luks2_hdr *hdr, int segment)
+{
+ json_object *jobj1, *jobj2, *jobj3;
+
+ jobj1 = LUKS2_get_segment_jobj(hdr, segment);
+ if (!jobj1)
+ return NULL;
+
+ if (!json_object_object_get_ex(jobj1, "integrity", &jobj2))
+ return NULL;
+
+ if (!json_object_object_get_ex(jobj2, "type", &jobj3))
+ return NULL;
+
+ return json_object_get_string(jobj3);
+}
+
+/* FIXME: this only ensures that once we have journal encryption, it is not ignored. */
+/* implement segment count and type restrictions (crypt and only single crypt) */
+static int LUKS2_integrity_compatible(struct luks2_hdr *hdr)
+{
+ json_object *jobj1, *jobj2, *jobj3, *jobj4;
+ const char *str;
+
+ if (!json_object_object_get_ex(hdr->jobj, "segments", &jobj1))
+ return 0;
+
+ if (!(jobj2 = LUKS2_get_segment_jobj(hdr, CRYPT_DEFAULT_SEGMENT)))
+ return 0;
+
+ if (!json_object_object_get_ex(jobj2, "integrity", &jobj3))
+ return 0;
+
+ if (!json_object_object_get_ex(jobj3, "journal_encryption", &jobj4) ||
+ !(str = json_object_get_string(jobj4)) ||
+ strcmp(str, "none"))
+ return 0;
+
+ if (!json_object_object_get_ex(jobj3, "journal_integrity", &jobj4) ||
+ !(str = json_object_get_string(jobj4)) ||
+ strcmp(str, "none"))
+ return 0;
+
+ return 1;
+}
+
+static int LUKS2_keyslot_get_volume_key_size(struct luks2_hdr *hdr, const char *keyslot)
+{
+ json_object *jobj1, *jobj2, *jobj3;
+
+ if (!json_object_object_get_ex(hdr->jobj, "keyslots", &jobj1))
+ return -1;
+
+ if (!json_object_object_get_ex(jobj1, keyslot, &jobj2))
+ return -1;
+
+ if (!json_object_object_get_ex(jobj2, "key_size", &jobj3))
+ return -1;
+
+ return json_object_get_int(jobj3);
+}
+
+/* Key size used for encryption of keyslot */
+int LUKS2_get_keyslot_stored_key_size(struct luks2_hdr *hdr, int keyslot)
+{
+ char keyslot_name[16];
+
+ if (snprintf(keyslot_name, sizeof(keyslot_name), "%u", keyslot) < 1)
+ return -1;
+
+ return LUKS2_keyslot_get_volume_key_size(hdr, keyslot_name);
+}
+
+int LUKS2_get_volume_key_size(struct luks2_hdr *hdr, int segment)
+{
+ json_object *jobj_digests, *jobj_digest_segments, *jobj_digest_keyslots, *jobj1;
+ char buf[16];
+
+ if (segment == CRYPT_DEFAULT_SEGMENT)
+ segment = LUKS2_get_default_segment(hdr);
+
+ if (snprintf(buf, sizeof(buf), "%u", segment) < 1)
+ return -1;
+
+ json_object_object_get_ex(hdr->jobj, "digests", &jobj_digests);
+
+ json_object_object_foreach(jobj_digests, key, val) {
+ UNUSED(key);
+ json_object_object_get_ex(val, "segments", &jobj_digest_segments);
+ json_object_object_get_ex(val, "keyslots", &jobj_digest_keyslots);
+
+ if (!LUKS2_array_jobj(jobj_digest_segments, buf))
+ continue;
+ if (json_object_array_length(jobj_digest_keyslots) <= 0)
+ continue;
+
+ jobj1 = json_object_array_get_idx(jobj_digest_keyslots, 0);
+
+ return LUKS2_keyslot_get_volume_key_size(hdr, json_object_get_string(jobj1));
+ }
+
+ return -1;
+}
+
+uint32_t LUKS2_get_sector_size(struct luks2_hdr *hdr)
+{
+ return json_segment_get_sector_size(LUKS2_get_segment_jobj(hdr, CRYPT_DEFAULT_SEGMENT));
+}
+
+int LUKS2_assembly_multisegment_dmd(struct crypt_device *cd,
+ struct luks2_hdr *hdr,
+ struct volume_key *vks,
+ json_object *jobj_segments,
+ struct crypt_dm_active_device *dmd)
+{
+ struct volume_key *vk;
+ json_object *jobj;
+ enum devcheck device_check;
+ int r;
+ unsigned s = 0;
+ uint64_t data_offset, segment_size, segment_offset, segment_start = 0;
+ struct dm_target *t = &dmd->segment;
+
+ if (dmd->flags & CRYPT_ACTIVATE_SHARED)
+ device_check = DEV_OK;
+ else
+ device_check = DEV_EXCL;
+
+ data_offset = LUKS2_reencrypt_data_offset(hdr, true);
+
+ r = device_block_adjust(cd, crypt_data_device(cd), device_check,
+ data_offset, &dmd->size, &dmd->flags);
+ if (r)
+ return r;
+
+ r = dm_targets_allocate(&dmd->segment, json_segments_count(jobj_segments));
+ if (r)
+ goto err;
+
+ r = -EINVAL;
+
+ while (t) {
+ jobj = json_segments_get_segment(jobj_segments, s);
+ if (!jobj) {
+ log_dbg(cd, "Internal error. Segment %u is null.", s);
+ r = -EINVAL;
+ goto err;
+ }
+
+ segment_offset = json_segment_get_offset(jobj, 1);
+ segment_size = json_segment_get_size(jobj, 1);
+ /* 'dynamic' length allowed in last segment only */
+ if (!segment_size && !t->next)
+ segment_size = dmd->size - segment_start;
+ if (!segment_size) {
+ log_dbg(cd, "Internal error. Wrong segment size %u", s);
+ r = -EINVAL;
+ goto err;
+ }
+
+ if (!strcmp(json_segment_type(jobj), "crypt")) {
+ vk = crypt_volume_key_by_id(vks, LUKS2_digest_by_segment(hdr, s));
+ if (!vk) {
+ log_err(cd, _("Missing key for dm-crypt segment %u"), s);
+ r = -EINVAL;
+ goto err;
+ }
+
+ r = dm_crypt_target_set(t, segment_start, segment_size,
+ crypt_data_device(cd), vk,
+ json_segment_get_cipher(jobj),
+ json_segment_get_iv_offset(jobj),
+ segment_offset, "none", 0,
+ json_segment_get_sector_size(jobj));
+ if (r) {
+ log_err(cd, _("Failed to set dm-crypt segment."));
+ goto err;
+ }
+ } else if (!strcmp(json_segment_type(jobj), "linear")) {
+ r = dm_linear_target_set(t, segment_start, segment_size, crypt_data_device(cd), segment_offset);
+ if (r) {
+ log_err(cd, _("Failed to set dm-linear segment."));
+ goto err;
+ }
+ } else {
+ r = -EINVAL;
+ goto err;
+ }
+
+ segment_start += segment_size;
+ t = t->next;
+ s++;
+ }
+
+ return r;
+err:
+ dm_targets_free(cd, dmd);
+ return r;
+}
+
+/* FIXME: This shares almost all code with activate_multi_custom */
+static int _reload_custom_multi(struct crypt_device *cd,
+ const char *name,
+ struct volume_key *vks,
+ json_object *jobj_segments,
+ uint64_t device_size,
+ uint32_t flags)
+{
+ int r;
+ struct luks2_hdr *hdr = crypt_get_hdr(cd, CRYPT_LUKS2);
+ struct crypt_dm_active_device dmd = {
+ .uuid = crypt_get_uuid(cd),
+ .size = device_size >> SECTOR_SHIFT
+ };
+
+ /* do not allow activation when particular requirements detected */
+ if ((r = LUKS2_unmet_requirements(cd, hdr, CRYPT_REQUIREMENT_ONLINE_REENCRYPT, 0)))
+ return r;
+
+ /* Add persistent activation flags */
+ if (!(flags & CRYPT_ACTIVATE_IGNORE_PERSISTENT))
+ LUKS2_config_get_flags(cd, hdr, &dmd.flags);
+
+ dmd.flags |= (flags | CRYPT_ACTIVATE_SHARED);
+
+ r = LUKS2_assembly_multisegment_dmd(cd, hdr, vks, jobj_segments, &dmd);
+ if (!r)
+ r = dm_reload_device(cd, name, &dmd, 0, 0);
+
+ dm_targets_free(cd, &dmd);
+ return r;
+}
+
+int LUKS2_reload(struct crypt_device *cd,
+ const char *name,
+ struct volume_key *vks,
+ uint64_t device_size,
+ uint32_t flags)
+{
+ if (crypt_get_integrity_tag_size(cd))
+ return -ENOTSUP;
+
+ return _reload_custom_multi(cd, name, vks,
+ LUKS2_get_segments_jobj(crypt_get_hdr(cd, CRYPT_LUKS2)), device_size, flags);
+}
+
+int LUKS2_activate_multi(struct crypt_device *cd,
+ const char *name,
+ struct volume_key *vks,
+ uint64_t device_size,
+ uint32_t flags)
+{
+ struct luks2_hdr *hdr = crypt_get_hdr(cd, CRYPT_LUKS2);
+ json_object *jobj_segments = LUKS2_get_segments_jobj(hdr);
+ int r;
+ struct crypt_dm_active_device dmd = {
+ .size = device_size,
+ .uuid = crypt_get_uuid(cd)
+ };
+
+ /* do not allow activation when particular requirements detected */
+ if ((r = LUKS2_unmet_requirements(cd, hdr, CRYPT_REQUIREMENT_ONLINE_REENCRYPT, 0)))
+ return r;
+
+ /* Add persistent activation flags */
+ if (!(flags & CRYPT_ACTIVATE_IGNORE_PERSISTENT))
+ LUKS2_config_get_flags(cd, hdr, &dmd.flags);
+
+ dmd.flags |= flags;
+
+ r = LUKS2_assembly_multisegment_dmd(cd, hdr, vks, jobj_segments, &dmd);
+ if (!r)
+ r = dm_create_device(cd, name, CRYPT_LUKS2, &dmd);
+
+ dm_targets_free(cd, &dmd);
+ return r;
+}
+
+int LUKS2_activate(struct crypt_device *cd,
+ const char *name,
+ struct volume_key *vk,
+ uint32_t flags)
+{
+ int r;
+ struct luks2_hdr *hdr = crypt_get_hdr(cd, CRYPT_LUKS2);
+ struct crypt_dm_active_device dmdi = {}, dmd = {
+ .uuid = crypt_get_uuid(cd)
+ };
+
+ /* do not allow activation when particular requirements detected */
+ if ((r = LUKS2_unmet_requirements(cd, hdr, 0, 0)))
+ return r;
+
+ r = dm_crypt_target_set(&dmd.segment, 0, dmd.size, crypt_data_device(cd),
+ vk, crypt_get_cipher_spec(cd), crypt_get_iv_offset(cd),
+ crypt_get_data_offset(cd), crypt_get_integrity(cd) ?: "none",
+ crypt_get_integrity_tag_size(cd), crypt_get_sector_size(cd));
+ if (r < 0)
+ return r;
+
+ /* Add persistent activation flags */
+ if (!(flags & CRYPT_ACTIVATE_IGNORE_PERSISTENT))
+ LUKS2_config_get_flags(cd, hdr, &dmd.flags);
+
+ dmd.flags |= flags;
+
+ if (crypt_get_integrity_tag_size(cd)) {
+ if (!LUKS2_integrity_compatible(hdr)) {
+ log_err(cd, _("Unsupported device integrity configuration."));
+ return -EINVAL;
+ }
+
+ if (dmd.flags & CRYPT_ACTIVATE_ALLOW_DISCARDS) {
+ log_err(cd, _("Discard/TRIM is not supported."));
+ return -EINVAL;
+ }
+
+ r = INTEGRITY_create_dmd_device(cd, NULL, NULL, NULL, NULL, &dmdi, dmd.flags, 0);
+ if (r)
+ return r;
+
+ dmdi.flags |= CRYPT_ACTIVATE_PRIVATE;
+ dmdi.uuid = dmd.uuid;
+ dmd.segment.u.crypt.offset = 0;
+ dmd.segment.size = dmdi.segment.size;
+
+ r = create_or_reload_device_with_integrity(cd, name, CRYPT_LUKS2, &dmd, &dmdi);
+ } else
+ r = create_or_reload_device(cd, name, CRYPT_LUKS2, &dmd);
+
+ dm_targets_free(cd, &dmd);
+ dm_targets_free(cd, &dmdi);
+
+ return r;
+}
+
+static bool is_reencryption_helper(const char *name)
+{
+ size_t len;
+
+ if (!name)
+ return false;
+
+ len = strlen(name);
+ return (len >= 9 && (!strncmp(name + len - 8, "-hotzone-", 9) ||
+ !strcmp(name + len - 8, "-overlay")));
+
+}
+
+static bool contains_reencryption_helper(char **names)
+{
+ while (*names) {
+ if (is_reencryption_helper(*names++))
+ return true;
+ }
+
+ return false;
+}
+
+int LUKS2_deactivate(struct crypt_device *cd, const char *name, struct luks2_hdr *hdr, struct crypt_dm_active_device *dmd, uint32_t flags)
+{
+ int r, ret;
+ struct dm_target *tgt;
+ crypt_status_info ci;
+ struct crypt_dm_active_device dmdc;
+ char **dep, deps_uuid_prefix[40], *deps[MAX_DM_DEPS+1] = { 0 };
+ const char *namei = NULL;
+ struct crypt_lock_handle *reencrypt_lock = NULL;
+
+ if (!dmd || !dmd->uuid || strncmp(CRYPT_LUKS2, dmd->uuid, sizeof(CRYPT_LUKS2)-1))
+ return -EINVAL;
+
+ /* uuid mismatch with metadata (if available) */
+ if (hdr && crypt_uuid_cmp(dmd->uuid, hdr->uuid))
+ return -EINVAL;
+
+ r = snprintf(deps_uuid_prefix, sizeof(deps_uuid_prefix), CRYPT_SUBDEV "-%.32s", dmd->uuid + 6);
+ if (r < 0 || (size_t)r != (sizeof(deps_uuid_prefix) - 1))
+ return -EINVAL;
+
+ tgt = &dmd->segment;
+
+ /* TODO: We have LUKS2 dependencies now */
+ if (single_segment(dmd) && tgt->type == DM_CRYPT && tgt->u.crypt.tag_size)
+ namei = device_dm_name(tgt->data_device);
+
+ r = dm_device_deps(cd, name, deps_uuid_prefix, deps, ARRAY_SIZE(deps));
+ if (r < 0)
+ goto out;
+
+ if (contains_reencryption_helper(deps)) {
+ r = LUKS2_reencrypt_lock_by_dm_uuid(cd, dmd->uuid, &reencrypt_lock);
+ if (r) {
+ if (r == -EBUSY)
+ log_err(cd, _("Reencryption in-progress. Cannot deactivate device."));
+ else
+ log_err(cd, _("Failed to get reencryption lock."));
+ goto out;
+ }
+ }
+
+ dep = deps;
+ while (*dep) {
+ if (is_reencryption_helper(*dep) && (dm_status_suspended(cd, *dep) > 0)) {
+ if (dm_error_device(cd, *dep))
+ log_err(cd, _("Failed to replace suspended device %s with dm-error target."), *dep);
+ }
+ dep++;
+ }
+
+ r = dm_query_device(cd, name, DM_ACTIVE_CRYPT_KEY | DM_ACTIVE_CRYPT_KEYSIZE, &dmdc);
+ if (r < 0) {
+ memset(&dmdc, 0, sizeof(dmdc));
+ dmdc.segment.type = DM_UNKNOWN;
+ }
+
+ /* Remove top level device first */
+ r = dm_remove_device(cd, name, flags);
+ if (!r) {
+ tgt = &dmdc.segment;
+ while (tgt) {
+ if (tgt->type == DM_CRYPT)
+ crypt_drop_keyring_key_by_description(cd, tgt->u.crypt.vk->key_description, LOGON_KEY);
+ tgt = tgt->next;
+ }
+ }
+ dm_targets_free(cd, &dmdc);
+
+ /* TODO: We have LUKS2 dependencies now */
+ if (r >= 0 && namei) {
+ log_dbg(cd, "Deactivating integrity device %s.", namei);
+ r = dm_remove_device(cd, namei, 0);
+ }
+
+ if (!r) {
+ ret = 0;
+ dep = deps;
+ while (*dep) {
+ log_dbg(cd, "Deactivating LUKS2 dependent device %s.", *dep);
+ r = dm_query_device(cd, *dep, DM_ACTIVE_CRYPT_KEY | DM_ACTIVE_CRYPT_KEYSIZE, &dmdc);
+ if (r < 0) {
+ memset(&dmdc, 0, sizeof(dmdc));
+ dmdc.segment.type = DM_UNKNOWN;
+ }
+
+ r = dm_remove_device(cd, *dep, flags);
+ if (r < 0) {
+ ci = crypt_status(cd, *dep);
+ if (ci == CRYPT_BUSY)
+ log_err(cd, _("Device %s is still in use."), *dep);
+ if (ci == CRYPT_INACTIVE)
+ r = 0;
+ }
+ if (!r) {
+ tgt = &dmdc.segment;
+ while (tgt) {
+ if (tgt->type == DM_CRYPT)
+ crypt_drop_keyring_key_by_description(cd, tgt->u.crypt.vk->key_description, LOGON_KEY);
+ tgt = tgt->next;
+ }
+ }
+ dm_targets_free(cd, &dmdc);
+ if (r && !ret)
+ ret = r;
+ dep++;
+ }
+ r = ret;
+ }
+
+out:
+ LUKS2_reencrypt_unlock(cd, reencrypt_lock);
+ dep = deps;
+ while (*dep)
+ free(*dep++);
+
+ return r;
+}
+
+int LUKS2_unmet_requirements(struct crypt_device *cd, struct luks2_hdr *hdr, uint32_t reqs_mask, int quiet)
+{
+ uint32_t reqs;
+ int r = LUKS2_config_get_requirements(cd, hdr, &reqs);
+
+ if (r) {
+ if (!quiet)
+ log_err(cd, _("Failed to read LUKS2 requirements."));
+ return r;
+ }
+
+ /* do not mask unknown requirements check */
+ if (reqs_unknown(reqs)) {
+ if (!quiet)
+ log_err(cd, _("Unmet LUKS2 requirements detected."));
+ return -ETXTBSY;
+ }
+
+ /* mask out permitted requirements */
+ reqs &= ~reqs_mask;
+
+ if (reqs_reencrypt(reqs) && !quiet)
+ log_err(cd, _("Operation incompatible with device marked for legacy reencryption. Aborting."));
+ if (reqs_reencrypt_online(reqs) && !quiet)
+ log_err(cd, _("Operation incompatible with device marked for LUKS2 reencryption. Aborting."));
+
+ /* any remaining unmasked requirement fails the check */
+ return reqs ? -EINVAL : 0;
+}
+
+/*
+ * NOTE: this routine is called on json object that failed validation.
+ * Proceed with caution :)
+ *
+ * known glitches so far:
+ *
+ * any version < 2.0.3:
+ * - luks2 keyslot pbkdf params change via crypt_keyslot_change_by_passphrase()
+ * could leave previous type parameters behind. Correct this by purging
+ * all params not needed by current type.
+ */
+void LUKS2_hdr_repair(struct crypt_device *cd, json_object *hdr_jobj)
+{
+ json_object *jobj_keyslots;
+
+ if (!json_object_object_get_ex(hdr_jobj, "keyslots", &jobj_keyslots))
+ return;
+ if (!json_object_is_type(jobj_keyslots, json_type_object))
+ return;
+
+ LUKS2_keyslots_repair(cd, jobj_keyslots);
+}
+
+void json_object_object_del_by_uint(json_object *jobj, unsigned key)
+{
+ char key_name[16];
+
+ if (snprintf(key_name, sizeof(key_name), "%u", key) < 1)
+ return;
+ json_object_object_del(jobj, key_name);
+}
+
+int json_object_object_add_by_uint(json_object *jobj, unsigned key, json_object *jobj_val)
+{
+ char key_name[16];
+
+ if (snprintf(key_name, sizeof(key_name), "%u", key) < 1)
+ return -EINVAL;
+
+#if HAVE_DECL_JSON_OBJECT_OBJECT_ADD_EX
+ return json_object_object_add_ex(jobj, key_name, jobj_val, 0) ? -ENOMEM : 0;
+#else
+ json_object_object_add(jobj, key_name, jobj_val);
+ return 0;
+#endif
+}
+
+/* jobj_dst must contain pointer initialized to NULL (see json-c json_object_deep_copy API) */
+int json_object_copy(json_object *jobj_src, json_object **jobj_dst)
+{
+ if (!jobj_src || !jobj_dst || *jobj_dst)
+ return -1;
+
+#if HAVE_DECL_JSON_OBJECT_DEEP_COPY
+ return json_object_deep_copy(jobj_src, jobj_dst, NULL);
+#else
+ *jobj_dst = json_tokener_parse(json_object_get_string(jobj_src));
+ return *jobj_dst ? 0 : -1;
+#endif
+}