-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
#include <sys/prctl.h>
-#include "util.h"
-#include "strv.h"
-#include "copy.h"
-#include "rm-rf.h"
+#include "alloc-util.h"
#include "btrfs-util.h"
-#include "capability.h"
-#include "pull-job.h"
-#include "pull-common.h"
+#include "capability-util.h"
+#include "copy.h"
+#include "dirent-util.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "io-util.h"
+#include "path-util.h"
#include "process-util.h"
+#include "pull-common.h"
+#include "pull-job.h"
+#include "rm-rf.h"
#include "signal-util.h"
+#include "siphash24.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
+#include "web-util.h"
#define FILENAME_ESCAPE "/.#\"\'"
+#define HASH_URL_THRESHOLD_LENGTH (_POSIX_PATH_MAX - 16)
int pull_find_old_etags(
const char *url,
if (force_local)
(void) rm_rf(p, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME);
- r = btrfs_subvol_snapshot(final, p, 0);
- if (r == -ENOTTY) {
- r = copy_tree(final, p, false);
- if (r < 0)
- return log_error_errno(r, "Failed to copy image: %m");
- } else if (r < 0)
+ r = btrfs_subvol_snapshot(final, p,
+ BTRFS_SNAPSHOT_QUOTA|
+ BTRFS_SNAPSHOT_FALLBACK_COPY|
+ BTRFS_SNAPSHOT_FALLBACK_DIRECTORY|
+ BTRFS_SNAPSHOT_RECURSIVE);
+ if (r < 0)
return log_error_errno(r, "Failed to create local image: %m");
log_info("Created new local image '%s'.", local);
return 0;
}
+static int hash_url(const char *url, char **ret) {
+ uint64_t h;
+ static const sd_id128_t k = SD_ID128_ARRAY(df,89,16,87,01,cc,42,30,98,ab,4a,19,a6,a5,63,4f);
+
+ assert(url);
+
+ h = siphash24(url, strlen(url), k.bytes);
+ if (asprintf(ret, "%"PRIx64, h) < 0)
+ return -ENOMEM;
+
+ return 0;
+}
+
int pull_make_path(const char *url, const char *etag, const char *image_root, const char *prefix, const char *suffix, char **ret) {
- _cleanup_free_ char *escaped_url = NULL;
+ _cleanup_free_ char *escaped_url = NULL, *escaped_etag = NULL;
char *path;
assert(url);
return -ENOMEM;
if (etag) {
- _cleanup_free_ char *escaped_etag = NULL;
-
escaped_etag = xescape(etag, FILENAME_ESCAPE);
if (!escaped_etag)
return -ENOMEM;
+ }
- path = strjoin(image_root, "/", strempty(prefix), escaped_url, ".", escaped_etag, strempty(suffix), NULL);
- } else
- path = strjoin(image_root, "/", strempty(prefix), escaped_url, strempty(suffix), NULL);
+ path = strjoin(image_root, "/", strempty(prefix), escaped_url, escaped_etag ? "." : "",
+ strempty(escaped_etag), strempty(suffix), NULL);
if (!path)
return -ENOMEM;
+ /* URLs might make the path longer than the maximum allowed length for a file name.
+ * When that happens, a URL hash is used instead. Paths returned by this function
+ * can be later used with tempfn_random() which adds 16 bytes to the resulting name. */
+ if (strlen(path) >= HASH_URL_THRESHOLD_LENGTH) {
+ _cleanup_free_ char *hash = NULL;
+ int r;
+
+ free(path);
+
+ r = hash_url(url, &hash);
+ if (r < 0)
+ return r;
+
+ path = strjoin(image_root, "/", strempty(prefix), hash, escaped_etag ? "." : "",
+ strempty(escaped_etag), strempty(suffix), NULL);
+ if (!path)
+ return -ENOMEM;
+ }
+
*ret = path;
return 0;
}
-int pull_make_settings_job(
+int pull_make_auxiliary_job(
PullJob **ret,
const char *url,
+ int (*strip_suffixes)(const char *name, char **ret),
+ const char *suffix,
CurlGlue *glue,
PullJobFinished on_finished,
void *userdata) {
- _cleanup_free_ char *last_component = NULL, *ll = NULL, *settings_url = NULL;
+ _cleanup_free_ char *last_component = NULL, *ll = NULL, *auxiliary_url = NULL;
_cleanup_(pull_job_unrefp) PullJob *job = NULL;
const char *q;
int r;
assert(ret);
assert(url);
+ assert(strip_suffixes);
assert(glue);
r = import_url_last_component(url, &last_component);
if (r < 0)
return r;
- r = tar_strip_suffixes(last_component, &ll);
+ r = strip_suffixes(last_component, &ll);
if (r < 0)
return r;
- q = strjoina(ll, ".nspawn");
+ q = strjoina(ll, suffix);
- r = import_url_change_last_component(url, q, &settings_url);
+ r = import_url_change_last_component(url, q, &auxiliary_url);
if (r < 0)
return r;
- r = pull_job_new(&job, settings_url, glue, userdata);
+ r = pull_job_new(&job, auxiliary_url, glue, userdata);
if (r < 0)
return r;
_cleanup_(pull_job_unrefp) PullJob *checksum_job = NULL, *signature_job = NULL;
int r;
+ const char *chksums = NULL;
assert(ret_checksum_job);
assert(ret_signature_job);
assert(glue);
if (verify != IMPORT_VERIFY_NO) {
- _cleanup_free_ char *checksum_url = NULL;
+ _cleanup_free_ char *checksum_url = NULL, *fn = NULL;
- /* Queue job for the SHA256SUMS file for the image */
- r = import_url_change_last_component(url, "SHA256SUMS", &checksum_url);
+ /* Queue jobs for the checksum file for the image. */
+ r = import_url_last_component(url, &fn);
+ if (r < 0)
+ return r;
+
+ chksums = strjoina(fn, ".sha256");
+
+ r = import_url_change_last_component(url, chksums, &checksum_url);
if (r < 0)
return r;
return 0;
}
-int pull_verify(PullJob *main_job,
- PullJob *settings_job,
- PullJob *checksum_job,
- PullJob *signature_job) {
-
- _cleanup_close_pair_ int gpg_pipe[2] = { -1, -1 };
+static int verify_one(PullJob *checksum_job, PullJob *job) {
_cleanup_free_ char *fn = NULL;
- _cleanup_close_ int sig_file = -1;
- const char *p, *line;
- char sig_file_path[] = "/tmp/sigXXXXXX", gpg_home[] = "/tmp/gpghomeXXXXXX";
- _cleanup_sigkill_wait_ pid_t pid = 0;
- bool gpg_home_created = false;
+ const char *line, *p;
int r;
- assert(main_job);
- assert(main_job->state == PULL_JOB_DONE);
+ assert(checksum_job);
- if (!checksum_job)
+ if (!job)
return 0;
- assert(main_job->calc_checksum);
- assert(main_job->checksum);
- assert(checksum_job->state == PULL_JOB_DONE);
+ assert(IN_SET(job->state, PULL_JOB_DONE, PULL_JOB_FAILED));
- if (!checksum_job->payload || checksum_job->payload_size <= 0) {
- log_error("Checksum is empty, cannot verify.");
- return -EBADMSG;
- }
+ /* Don't verify the checksum if we didn't actually successfully download something new */
+ if (job->state != PULL_JOB_DONE)
+ return 0;
+ if (job->error != 0)
+ return 0;
+ if (job->etag_exists)
+ return 0;
+
+ assert(job->calc_checksum);
+ assert(job->checksum);
- r = import_url_last_component(main_job->url, &fn);
+ r = import_url_last_component(job->url, &fn);
if (r < 0)
return log_oom();
if (!filename_is_valid(fn)) {
- log_error("Cannot verify checksum, could not determine valid server-side file name.");
+ log_error("Cannot verify checksum, could not determine server-side file name.");
return -EBADMSG;
}
- line = strjoina(main_job->checksum, " *", fn, "\n");
+ line = strjoina(job->checksum, " *", fn, "\n");
p = memmem(checksum_job->payload,
checksum_job->payload_size,
line,
strlen(line));
+ if (!p) {
+ line = strjoina(job->checksum, " ", fn, "\n");
+
+ p = memmem(checksum_job->payload,
+ checksum_job->payload_size,
+ line,
+ strlen(line));
+ }
+
if (!p || (p != (char*) checksum_job->payload && p[-1] != '\n')) {
- log_error("DOWNLOAD INVALID: Checksum did not check out, payload has been tempered with.");
+ log_error("DOWNLOAD INVALID: Checksum of %s file did not checkout, file has been tampered with.", fn);
return -EBADMSG;
}
- log_info("SHA256 checksum of %s is valid.", main_job->url);
+ log_info("SHA256 checksum of %s is valid.", job->url);
+ return 1;
+}
- assert(!settings_job || settings_job->state == PULL_JOB_DONE);
+int pull_verify(PullJob *main_job,
+ PullJob *roothash_job,
+ PullJob *settings_job,
+ PullJob *checksum_job,
+ PullJob *signature_job) {
- if (settings_job &&
- settings_job->error == 0 &&
- !settings_job->etag_exists) {
+ _cleanup_close_pair_ int gpg_pipe[2] = { -1, -1 };
+ _cleanup_close_ int sig_file = -1;
+ char sig_file_path[] = "/tmp/sigXXXXXX", gpg_home[] = "/tmp/gpghomeXXXXXX";
+ _cleanup_(sigkill_waitp) pid_t pid = 0;
+ bool gpg_home_created = false;
+ int r;
- _cleanup_free_ char *settings_fn = NULL;
+ assert(main_job);
+ assert(main_job->state == PULL_JOB_DONE);
- assert(settings_job->calc_checksum);
- assert(settings_job->checksum);
+ if (!checksum_job)
+ return 0;
- r = import_url_last_component(settings_job->url, &settings_fn);
- if (r < 0)
- return log_oom();
+ assert(main_job->calc_checksum);
+ assert(main_job->checksum);
- if (!filename_is_valid(settings_fn)) {
- log_error("Cannot verify checksum, could not determine server-side settings file name.");
- return -EBADMSG;
- }
+ assert(checksum_job->state == PULL_JOB_DONE);
- line = strjoina(settings_job->checksum, " *", settings_fn, "\n");
+ if (!checksum_job->payload || checksum_job->payload_size <= 0) {
+ log_error("Checksum is empty, cannot verify.");
+ return -EBADMSG;
+ }
- p = memmem(checksum_job->payload,
- checksum_job->payload_size,
- line,
- strlen(line));
+ r = verify_one(checksum_job, main_job);
+ if (r < 0)
+ return r;
- if (!p || (p != (char*) checksum_job->payload && p[-1] != '\n')) {
- log_error("DOWNLOAD INVALID: Checksum of settings file did not checkout, settings file has been tempered with.");
- return -EBADMSG;
- }
+ r = verify_one(checksum_job, roothash_job);
+ if (r < 0)
+ return r;
- log_info("SHA256 checksum of %s is valid.", settings_job->url);
- }
+ r = verify_one(checksum_job, settings_job);
+ if (r < 0)
+ return r;
if (!signature_job)
return 0;
+ if (checksum_job->style == VERIFICATION_PER_FILE)
+ signature_job = checksum_job;
+
assert(signature_job->state == PULL_JOB_DONE);
if (!signature_job->payload || signature_job->payload_size <= 0) {
cmd[k++] = "--keyring=" VENDOR_KEYRING_PATH;
cmd[k++] = "--verify";
- cmd[k++] = sig_file_path;
- cmd[k++] = "-";
- cmd[k++] = NULL;
+ if (checksum_job->style == VERIFICATION_PER_DIRECTORY) {
+ cmd[k++] = sig_file_path;
+ cmd[k++] = "-";
+ cmd[k++] = NULL;
+ }
- fd_cloexec(STDIN_FILENO, false);
- fd_cloexec(STDOUT_FILENO, false);
- fd_cloexec(STDERR_FILENO, false);
+ stdio_unset_cloexec();
execvp("gpg2", (char * const *) cmd);
execvp("gpg", (char * const *) cmd);
projects / thirdparty / systemd.git / blobdiff