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-rw-r--r--openbsd-compat/port-solaris.c363
1 files changed, 363 insertions, 0 deletions
diff --git a/openbsd-compat/port-solaris.c b/openbsd-compat/port-solaris.c
new file mode 100644
index 0000000..0e89dc3
--- /dev/null
+++ b/openbsd-compat/port-solaris.c
@@ -0,0 +1,363 @@
+/*
+ * Copyright (c) 2006 Chad Mynhier.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "config.h"
+#include "includes.h"
+
+#ifdef USE_SOLARIS_PROCESS_CONTRACTS
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+
+#include <errno.h>
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
+#include <stdarg.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <libcontract.h>
+#include <sys/contract/process.h>
+#include <sys/ctfs.h>
+
+#include "log.h"
+
+#define CT_TEMPLATE CTFS_ROOT "/process/template"
+#define CT_LATEST CTFS_ROOT "/process/latest"
+
+static int tmpl_fd = -1;
+
+/* Lookup the latest process contract */
+static ctid_t
+get_active_process_contract_id(void)
+{
+ int stat_fd;
+ ctid_t ctid = -1;
+ ct_stathdl_t stathdl;
+
+ if ((stat_fd = open64(CT_LATEST, O_RDONLY)) == -1) {
+ error("%s: Error opening 'latest' process "
+ "contract: %s", __func__, strerror(errno));
+ return -1;
+ }
+ if (ct_status_read(stat_fd, CTD_COMMON, &stathdl) != 0) {
+ error("%s: Error reading process contract "
+ "status: %s", __func__, strerror(errno));
+ goto out;
+ }
+ if ((ctid = ct_status_get_id(stathdl)) < 0) {
+ error("%s: Error getting process contract id: %s",
+ __func__, strerror(errno));
+ goto out;
+ }
+
+ ct_status_free(stathdl);
+ out:
+ close(stat_fd);
+ return ctid;
+}
+
+void
+solaris_contract_pre_fork(void)
+{
+ if ((tmpl_fd = open64(CT_TEMPLATE, O_RDWR)) == -1) {
+ error("%s: open %s: %s", __func__,
+ CT_TEMPLATE, strerror(errno));
+ return;
+ }
+
+ debug2("%s: setting up process contract template on fd %d",
+ __func__, tmpl_fd);
+
+ /* First we set the template parameters and event sets. */
+ if (ct_pr_tmpl_set_param(tmpl_fd, CT_PR_PGRPONLY) != 0) {
+ error("%s: Error setting process contract parameter set "
+ "(pgrponly): %s", __func__, strerror(errno));
+ goto fail;
+ }
+ if (ct_pr_tmpl_set_fatal(tmpl_fd, CT_PR_EV_HWERR) != 0) {
+ error("%s: Error setting process contract template "
+ "fatal events: %s", __func__, strerror(errno));
+ goto fail;
+ }
+ if (ct_tmpl_set_critical(tmpl_fd, 0) != 0) {
+ error("%s: Error setting process contract template "
+ "critical events: %s", __func__, strerror(errno));
+ goto fail;
+ }
+ if (ct_tmpl_set_informative(tmpl_fd, CT_PR_EV_HWERR) != 0) {
+ error("%s: Error setting process contract template "
+ "informative events: %s", __func__, strerror(errno));
+ goto fail;
+ }
+
+ /* Now make this the active template for this process. */
+ if (ct_tmpl_activate(tmpl_fd) != 0) {
+ error("%s: Error activating process contract "
+ "template: %s", __func__, strerror(errno));
+ goto fail;
+ }
+ return;
+
+ fail:
+ if (tmpl_fd != -1) {
+ close(tmpl_fd);
+ tmpl_fd = -1;
+ }
+}
+
+void
+solaris_contract_post_fork_child()
+{
+ debug2("%s: clearing process contract template on fd %d",
+ __func__, tmpl_fd);
+
+ /* Clear the active template. */
+ if (ct_tmpl_clear(tmpl_fd) != 0)
+ error("%s: Error clearing active process contract "
+ "template: %s", __func__, strerror(errno));
+
+ close(tmpl_fd);
+ tmpl_fd = -1;
+}
+
+void
+solaris_contract_post_fork_parent(pid_t pid)
+{
+ ctid_t ctid;
+ char ctl_path[256];
+ int r, ctl_fd = -1, stat_fd = -1;
+
+ debug2("%s: clearing template (fd %d)", __func__, tmpl_fd);
+
+ if (tmpl_fd == -1)
+ return;
+
+ /* First clear the active template. */
+ if ((r = ct_tmpl_clear(tmpl_fd)) != 0)
+ error("%s: Error clearing active process contract "
+ "template: %s", __func__, strerror(errno));
+
+ close(tmpl_fd);
+ tmpl_fd = -1;
+
+ /*
+ * If either the fork didn't succeed (pid < 0), or clearing
+ * th active contract failed (r != 0), then we have nothing
+ * more do.
+ */
+ if (r != 0 || pid <= 0)
+ return;
+
+ /* Now lookup and abandon the contract we've created. */
+ ctid = get_active_process_contract_id();
+
+ debug2("%s: abandoning contract id %ld", __func__, ctid);
+
+ snprintf(ctl_path, sizeof(ctl_path),
+ CTFS_ROOT "/process/%ld/ctl", ctid);
+ if ((ctl_fd = open64(ctl_path, O_WRONLY)) < 0) {
+ error("%s: Error opening process contract "
+ "ctl file: %s", __func__, strerror(errno));
+ goto fail;
+ }
+ if (ct_ctl_abandon(ctl_fd) < 0) {
+ error("%s: Error abandoning process contract: %s",
+ __func__, strerror(errno));
+ goto fail;
+ }
+ close(ctl_fd);
+ return;
+
+ fail:
+ if (tmpl_fd != -1) {
+ close(tmpl_fd);
+ tmpl_fd = -1;
+ }
+ if (stat_fd != -1)
+ close(stat_fd);
+ if (ctl_fd != -1)
+ close(ctl_fd);
+}
+#endif
+
+#ifdef USE_SOLARIS_PROJECTS
+#include <sys/task.h>
+#include <project.h>
+
+/*
+ * Get/set solaris default project.
+ * If we fail, just run along gracefully.
+ */
+void
+solaris_set_default_project(struct passwd *pw)
+{
+ struct project *defaultproject;
+ struct project tempproject;
+ char buf[1024];
+
+ /* get default project, if we fail just return gracefully */
+ if ((defaultproject = getdefaultproj(pw->pw_name, &tempproject, &buf,
+ sizeof(buf))) != NULL) {
+ /* set default project */
+ if (setproject(defaultproject->pj_name, pw->pw_name,
+ TASK_NORMAL) != 0)
+ debug("setproject(%s): %s", defaultproject->pj_name,
+ strerror(errno));
+ } else {
+ /* debug on getdefaultproj() error */
+ debug("getdefaultproj(%s): %s", pw->pw_name, strerror(errno));
+ }
+}
+#endif /* USE_SOLARIS_PROJECTS */
+
+#ifdef USE_SOLARIS_PRIVS
+# ifdef HAVE_PRIV_H
+# include <priv.h>
+# endif
+
+priv_set_t *
+solaris_basic_privset(void)
+{
+ priv_set_t *pset;
+
+#ifdef HAVE_PRIV_BASICSET
+ if ((pset = priv_allocset()) == NULL) {
+ error("priv_allocset: %s", strerror(errno));
+ return NULL;
+ }
+ priv_basicset(pset);
+#else
+ if ((pset = priv_str_to_set("basic", ",", NULL)) == NULL) {
+ error("priv_str_to_set: %s", strerror(errno));
+ return NULL;
+ }
+#endif
+ return pset;
+}
+
+void
+solaris_drop_privs_pinfo_net_fork_exec(void)
+{
+ priv_set_t *pset = NULL, *npset = NULL;
+
+ /*
+ * Note: this variant avoids dropping DAC filesystem rights, in case
+ * the process calling it is running as root and should have the
+ * ability to read/write/chown any file on the system.
+ *
+ * We start with the basic set, then *add* the DAC rights to it while
+ * taking away other parts of BASIC we don't need. Then we intersect
+ * this with our existing PERMITTED set. In this way we keep any
+ * DAC rights we had before, while otherwise reducing ourselves to
+ * the minimum set of privileges we need to proceed.
+ *
+ * This also means we drop any other parts of "root" that we don't
+ * need (e.g. the ability to kill any process, create new device nodes
+ * etc etc).
+ */
+
+ if ((pset = priv_allocset()) == NULL)
+ fatal("priv_allocset: %s", strerror(errno));
+ if ((npset = solaris_basic_privset()) == NULL)
+ fatal("solaris_basic_privset: %s", strerror(errno));
+
+ if (priv_addset(npset, PRIV_FILE_CHOWN) != 0 ||
+ priv_addset(npset, PRIV_FILE_DAC_READ) != 0 ||
+ priv_addset(npset, PRIV_FILE_DAC_SEARCH) != 0 ||
+ priv_addset(npset, PRIV_FILE_DAC_WRITE) != 0 ||
+ priv_addset(npset, PRIV_FILE_OWNER) != 0)
+ fatal("priv_addset: %s", strerror(errno));
+
+ if (priv_delset(npset, PRIV_FILE_LINK_ANY) != 0 ||
+#ifdef PRIV_NET_ACCESS
+ priv_delset(npset, PRIV_NET_ACCESS) != 0 ||
+#endif
+ priv_delset(npset, PRIV_PROC_EXEC) != 0 ||
+ priv_delset(npset, PRIV_PROC_FORK) != 0 ||
+ priv_delset(npset, PRIV_PROC_INFO) != 0 ||
+ priv_delset(npset, PRIV_PROC_SESSION) != 0)
+ fatal("priv_delset: %s", strerror(errno));
+
+ if (getppriv(PRIV_PERMITTED, pset) != 0)
+ fatal("getppriv: %s", strerror(errno));
+
+ priv_intersect(pset, npset);
+
+ if (setppriv(PRIV_SET, PRIV_PERMITTED, npset) != 0 ||
+ setppriv(PRIV_SET, PRIV_LIMIT, npset) != 0 ||
+ setppriv(PRIV_SET, PRIV_INHERITABLE, npset) != 0)
+ fatal("setppriv: %s", strerror(errno));
+
+ priv_freeset(pset);
+ priv_freeset(npset);
+}
+
+void
+solaris_drop_privs_root_pinfo_net(void)
+{
+ priv_set_t *pset = NULL;
+
+ /* Start with "basic" and drop everything we don't need. */
+ if ((pset = solaris_basic_privset()) == NULL)
+ fatal("solaris_basic_privset: %s", strerror(errno));
+
+ if (priv_delset(pset, PRIV_FILE_LINK_ANY) != 0 ||
+#ifdef PRIV_NET_ACCESS
+ priv_delset(pset, PRIV_NET_ACCESS) != 0 ||
+#endif
+ priv_delset(pset, PRIV_PROC_INFO) != 0 ||
+ priv_delset(pset, PRIV_PROC_SESSION) != 0)
+ fatal("priv_delset: %s", strerror(errno));
+
+ if (setppriv(PRIV_SET, PRIV_PERMITTED, pset) != 0 ||
+ setppriv(PRIV_SET, PRIV_LIMIT, pset) != 0 ||
+ setppriv(PRIV_SET, PRIV_INHERITABLE, pset) != 0)
+ fatal("setppriv: %s", strerror(errno));
+
+ priv_freeset(pset);
+}
+
+void
+solaris_drop_privs_root_pinfo_net_exec(void)
+{
+ priv_set_t *pset = NULL;
+
+
+ /* Start with "basic" and drop everything we don't need. */
+ if ((pset = solaris_basic_privset()) == NULL)
+ fatal("solaris_basic_privset: %s", strerror(errno));
+
+ if (priv_delset(pset, PRIV_FILE_LINK_ANY) != 0 ||
+#ifdef PRIV_NET_ACCESS
+ priv_delset(pset, PRIV_NET_ACCESS) != 0 ||
+#endif
+ priv_delset(pset, PRIV_PROC_EXEC) != 0 ||
+ priv_delset(pset, PRIV_PROC_INFO) != 0 ||
+ priv_delset(pset, PRIV_PROC_SESSION) != 0)
+ fatal("priv_delset: %s", strerror(errno));
+
+ if (setppriv(PRIV_SET, PRIV_PERMITTED, pset) != 0 ||
+ setppriv(PRIV_SET, PRIV_LIMIT, pset) != 0 ||
+ setppriv(PRIV_SET, PRIV_INHERITABLE, pset) != 0)
+ fatal("setppriv: %s", strerror(errno));
+
+ priv_freeset(pset);
+}
+
+#endif