summaryrefslogtreecommitdiff
path: root/src/import/import-common.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/import/import-common.c')
-rw-r--r--src/import/import-common.c545
1 files changed, 0 insertions, 545 deletions
diff --git a/src/import/import-common.c b/src/import/import-common.c
deleted file mode 100644
index f10a453eed..0000000000
--- a/src/import/import-common.c
+++ /dev/null
@@ -1,545 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2015 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/prctl.h>
-
-#include "util.h"
-#include "strv.h"
-#include "copy.h"
-#include "btrfs-util.h"
-#include "capability.h"
-#include "import-job.h"
-#include "import-common.h"
-
-#define FILENAME_ESCAPE "/.#\"\'"
-
-int import_find_old_etags(const char *url, const char *image_root, int dt, const char *prefix, const char *suffix, char ***etags) {
- _cleanup_free_ char *escaped_url = NULL;
- _cleanup_closedir_ DIR *d = NULL;
- _cleanup_strv_free_ char **l = NULL;
- struct dirent *de;
- int r;
-
- assert(url);
- assert(etags);
-
- if (!image_root)
- image_root = "/var/lib/machines";
-
- escaped_url = xescape(url, FILENAME_ESCAPE);
- if (!escaped_url)
- return -ENOMEM;
-
- d = opendir(image_root);
- if (!d) {
- if (errno == ENOENT) {
- *etags = NULL;
- return 0;
- }
-
- return -errno;
- }
-
- FOREACH_DIRENT_ALL(de, d, return -errno) {
- const char *a, *b;
- char *u;
-
- if (de->d_type != DT_UNKNOWN &&
- de->d_type != dt)
- continue;
-
- if (prefix) {
- a = startswith(de->d_name, prefix);
- if (!a)
- continue;
- } else
- a = de->d_name;
-
- a = startswith(a, escaped_url);
- if (!a)
- continue;
-
- a = startswith(a, ".");
- if (!a)
- continue;
-
- if (suffix) {
- b = endswith(de->d_name, suffix);
- if (!b)
- continue;
- } else
- b = strchr(de->d_name, 0);
-
- if (a >= b)
- continue;
-
- u = cunescape_length(a, b - a);
- if (!u)
- return -ENOMEM;
-
- if (!http_etag_is_valid(u)) {
- free(u);
- continue;
- }
-
- r = strv_consume(&l, u);
- if (r < 0)
- return r;
- }
-
- *etags = l;
- l = NULL;
-
- return 0;
-}
-
-int import_make_local_copy(const char *final, const char *image_root, const char *local, bool force_local) {
- const char *p;
- int r;
-
- assert(final);
- assert(local);
-
- if (!image_root)
- image_root = "/var/lib/machines";
-
- p = strjoina(image_root, "/", local);
-
- if (force_local) {
- (void) btrfs_subvol_remove(p);
- (void) rm_rf_dangerous(p, false, true, false);
- }
-
- r = btrfs_subvol_snapshot(final, p, false, false);
- 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)
- return log_error_errno(r, "Failed to create local image: %m");
-
- log_info("Created new local image '%s'.", local);
-
- return 0;
-}
-
-int import_make_read_only_fd(int fd) {
- int r;
-
- assert(fd >= 0);
-
- /* First, let's make this a read-only subvolume if it refers
- * to a subvolume */
- r = btrfs_subvol_set_read_only_fd(fd, true);
- if (r == -ENOTTY || r == -ENOTDIR || r == -EINVAL) {
- struct stat st;
-
- /* This doesn't refer to a subvolume, or the file
- * system isn't even btrfs. In that, case fall back to
- * chmod()ing */
-
- r = fstat(fd, &st);
- if (r < 0)
- return log_error_errno(errno, "Failed to stat temporary image: %m");
-
- /* Drop "w" flag */
- if (fchmod(fd, st.st_mode & 07555) < 0)
- return log_error_errno(errno, "Failed to chmod() final image: %m");
-
- return 0;
-
- } else if (r < 0)
- return log_error_errno(r, "Failed to make subvolume read-only: %m");
-
- return 0;
-}
-
-int import_make_read_only(const char *path) {
- _cleanup_close_ int fd = 1;
-
- fd = open(path, O_RDONLY|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return log_error_errno(errno, "Failed to open %s: %m", path);
-
- return import_make_read_only_fd(fd);
-}
-
-int import_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;
- char *path;
-
- assert(url);
- assert(ret);
-
- if (!image_root)
- image_root = "/var/lib/machines";
-
- escaped_url = xescape(url, FILENAME_ESCAPE);
- if (!escaped_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);
- if (!path)
- return -ENOMEM;
-
- *ret = path;
- return 0;
-}
-
-int import_make_verification_jobs(
- ImportJob **ret_checksum_job,
- ImportJob **ret_signature_job,
- ImportVerify verify,
- const char *url,
- CurlGlue *glue,
- ImportJobFinished on_finished,
- void *userdata) {
-
- _cleanup_(import_job_unrefp) ImportJob *checksum_job = NULL, *signature_job = NULL;
- int r;
-
- assert(ret_checksum_job);
- assert(ret_signature_job);
- assert(verify >= 0);
- assert(verify < _IMPORT_VERIFY_MAX);
- assert(url);
- assert(glue);
-
- if (verify != IMPORT_VERIFY_NO) {
- _cleanup_free_ char *checksum_url = NULL;
-
- /* Queue job for the SHA256SUMS file for the image */
- r = import_url_change_last_component(url, "SHA256SUMS", &checksum_url);
- if (r < 0)
- return r;
-
- r = import_job_new(&checksum_job, checksum_url, glue, userdata);
- if (r < 0)
- return r;
-
- checksum_job->on_finished = on_finished;
- checksum_job->uncompressed_max = checksum_job->compressed_max = 1ULL * 1024ULL * 1024ULL;
- }
-
- if (verify == IMPORT_VERIFY_SIGNATURE) {
- _cleanup_free_ char *signature_url = NULL;
-
- /* Queue job for the SHA256SUMS.gpg file for the image. */
- r = import_url_change_last_component(url, "SHA256SUMS.gpg", &signature_url);
- if (r < 0)
- return r;
-
- r = import_job_new(&signature_job, signature_url, glue, userdata);
- if (r < 0)
- return r;
-
- signature_job->on_finished = on_finished;
- signature_job->uncompressed_max = signature_job->compressed_max = 1ULL * 1024ULL * 1024ULL;
- }
-
- *ret_checksum_job = checksum_job;
- *ret_signature_job = signature_job;
-
- checksum_job = signature_job = NULL;
-
- return 0;
-}
-
-int import_verify(
- ImportJob *main_job,
- ImportJob *checksum_job,
- ImportJob *signature_job) {
-
- _cleanup_close_pair_ int gpg_pipe[2] = { -1, -1 };
- _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;
- int r;
-
- assert(main_job);
- assert(main_job->state == IMPORT_JOB_DONE);
-
- if (!checksum_job)
- return 0;
-
- assert(main_job->calc_checksum);
- assert(main_job->checksum);
- assert(checksum_job->state == IMPORT_JOB_DONE);
-
- if (!checksum_job->payload || checksum_job->payload_size <= 0) {
- log_error("Checksum is empty, cannot verify.");
- return -EBADMSG;
- }
-
- r = import_url_last_component(main_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.");
- return -EBADMSG;
- }
-
- line = strjoina(main_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("Checksum did not check out, payload has been tempered with.");
- return -EBADMSG;
- }
-
- log_info("SHA256 checksum of %s is valid.", main_job->url);
-
- if (!signature_job)
- return 0;
-
- assert(signature_job->state == IMPORT_JOB_DONE);
-
- if (!signature_job->payload || signature_job->payload_size <= 0) {
- log_error("Signature is empty, cannot verify.");
- return -EBADMSG;
- }
-
- r = pipe2(gpg_pipe, O_CLOEXEC);
- if (r < 0)
- return log_error_errno(errno, "Failed to create pipe for gpg: %m");
-
- sig_file = mkostemp(sig_file_path, O_RDWR);
- if (sig_file < 0)
- return log_error_errno(errno, "Failed to create temporary file: %m");
-
- r = loop_write(sig_file, signature_job->payload, signature_job->payload_size, false);
- if (r < 0) {
- log_error_errno(r, "Failed to write to temporary file: %m");
- goto finish;
- }
-
- if (!mkdtemp(gpg_home)) {
- r = log_error_errno(errno, "Failed to create tempory home for gpg: %m");
- goto finish;
- }
-
- gpg_home_created = true;
-
- pid = fork();
- if (pid < 0)
- return log_error_errno(errno, "Failed to fork off gpg: %m");
- if (pid == 0) {
- const char *cmd[] = {
- "gpg",
- "--no-options",
- "--no-default-keyring",
- "--no-auto-key-locate",
- "--no-auto-check-trustdb",
- "--batch",
- "--trust-model=always",
- NULL, /* --homedir= */
- NULL, /* --keyring= */
- NULL, /* --verify */
- NULL, /* signature file */
- NULL, /* dash */
- NULL /* trailing NULL */
- };
- unsigned k = ELEMENTSOF(cmd) - 6;
- int null_fd;
-
- /* Child */
-
- reset_all_signal_handlers();
- reset_signal_mask();
- assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
- gpg_pipe[1] = safe_close(gpg_pipe[1]);
-
- if (dup2(gpg_pipe[0], STDIN_FILENO) != STDIN_FILENO) {
- log_error_errno(errno, "Failed to dup2() fd: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (gpg_pipe[0] != STDIN_FILENO)
- gpg_pipe[0] = safe_close(gpg_pipe[0]);
-
- null_fd = open("/dev/null", O_WRONLY|O_NOCTTY);
- if (null_fd < 0) {
- log_error_errno(errno, "Failed to open /dev/null: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (dup2(null_fd, STDOUT_FILENO) != STDOUT_FILENO) {
- log_error_errno(errno, "Failed to dup2() fd: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (null_fd != STDOUT_FILENO)
- null_fd = safe_close(null_fd);
-
- cmd[k++] = strjoina("--homedir=", gpg_home);
-
- /* We add the user keyring only to the command line
- * arguments, if it's around since gpg fails
- * otherwise. */
- if (access(USER_KEYRING_PATH, F_OK) >= 0)
- cmd[k++] = "--keyring=" USER_KEYRING_PATH;
- else
- cmd[k++] = "--keyring=" VENDOR_KEYRING_PATH;
-
- cmd[k++] = "--verify";
- 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);
-
- execvp("gpg2", (char * const *) cmd);
- execvp("gpg", (char * const *) cmd);
- log_error_errno(errno, "Failed to execute gpg: %m");
- _exit(EXIT_FAILURE);
- }
-
- gpg_pipe[0] = safe_close(gpg_pipe[0]);
-
- r = loop_write(gpg_pipe[1], checksum_job->payload, checksum_job->payload_size, false);
- if (r < 0) {
- log_error_errno(r, "Failed to write to pipe: %m");
- goto finish;
- }
-
- gpg_pipe[1] = safe_close(gpg_pipe[1]);
-
- r = wait_for_terminate_and_warn("gpg", pid, true);
- pid = 0;
- if (r < 0)
- goto finish;
- if (r > 0) {
- log_error("Signature verification failed.");
- r = -EBADMSG;
- } else {
- log_info("Signature verification succeeded.");
- r = 0;
- }
-
-finish:
- if (sig_file >= 0)
- unlink(sig_file_path);
-
- if (gpg_home_created)
- rm_rf_dangerous(gpg_home, false, true, false);
-
- return r;
-}
-
-int import_fork_tar(const char *path, pid_t *ret) {
- _cleanup_close_pair_ int pipefd[2] = { -1, -1 };
- pid_t pid;
- int r;
-
- assert(path);
- assert(ret);
-
- if (pipe2(pipefd, O_CLOEXEC) < 0)
- return log_error_errno(errno, "Failed to create pipe for tar: %m");
-
- pid = fork();
- if (pid < 0)
- return log_error_errno(errno, "Failed to fork off tar: %m");
-
- if (pid == 0) {
- int null_fd;
- uint64_t retain =
- (1ULL << CAP_CHOWN) |
- (1ULL << CAP_FOWNER) |
- (1ULL << CAP_FSETID) |
- (1ULL << CAP_MKNOD) |
- (1ULL << CAP_SETFCAP) |
- (1ULL << CAP_DAC_OVERRIDE);
-
- /* Child */
-
- reset_all_signal_handlers();
- reset_signal_mask();
- assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
- pipefd[1] = safe_close(pipefd[1]);
-
- if (dup2(pipefd[0], STDIN_FILENO) != STDIN_FILENO) {
- log_error_errno(errno, "Failed to dup2() fd: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (pipefd[0] != STDIN_FILENO)
- pipefd[0] = safe_close(pipefd[0]);
-
- null_fd = open("/dev/null", O_WRONLY|O_NOCTTY);
- if (null_fd < 0) {
- log_error_errno(errno, "Failed to open /dev/null: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (dup2(null_fd, STDOUT_FILENO) != STDOUT_FILENO) {
- log_error_errno(errno, "Failed to dup2() fd: %m");
- _exit(EXIT_FAILURE);
- }
-
- if (null_fd != STDOUT_FILENO)
- null_fd = safe_close(null_fd);
-
- fd_cloexec(STDIN_FILENO, false);
- fd_cloexec(STDOUT_FILENO, false);
- fd_cloexec(STDERR_FILENO, false);
-
- if (unshare(CLONE_NEWNET) < 0)
- log_error_errno(errno, "Failed to lock tar into network namespace, ignoring: %m");
-
- r = capability_bounding_set_drop(~retain, true);
- if (r < 0)
- log_error_errno(r, "Failed to drop capabilities, ignoring: %m");
-
- execlp("tar", "tar", "--numeric-owner", "-C", path, "-px", NULL);
- log_error_errno(errno, "Failed to execute tar: %m");
- _exit(EXIT_FAILURE);
- }
-
- pipefd[0] = safe_close(pipefd[0]);
- r = pipefd[1];
- pipefd[1] = -1;
-
- *ret = pid;
-
- return r;
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 05:53:33 +0000