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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-03-11 22:16:02 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-03-11 22:16:02 +0000
commit1203c9bf2f63938f7766a3022a9659b25712824f (patch)
tree162a5019d61ce2403466754ab0ee727e04f1563b /selinux
parentbaca1759129945fcd03d96ccc840892401b5a1af (diff)
downloadbusybox-1203c9bf2f63938f7766a3022a9659b25712824f.tar.gz
busybox-1203c9bf2f63938f7766a3022a9659b25712824f.tar.bz2
next portion of selinux updates: chcon, runcon. From
Yuichi Nakamura <himainu-ynakam@miomio.jp> KaiGai Kohei <busybox@kaigai.gr.jp>
Diffstat (limited to 'selinux')
-rw-r--r--selinux/chcon.c175
-rw-r--r--selinux/runcon.c137
2 files changed, 312 insertions, 0 deletions
diff --git a/selinux/chcon.c b/selinux/chcon.c
new file mode 100644
index 000000000..d7ff40816
--- /dev/null
+++ b/selinux/chcon.c
@@ -0,0 +1,175 @@
+/*
+ * chcon -- change security context, based on coreutils-5.97-13
+ *
+ * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
+ *
+ * Copyright (C) 2006 - 2007 KaiGai Kohei <kaigai@kaigai.gr.jp>
+ */
+#include "busybox.h"
+#include <getopt.h>
+#include <selinux/context.h>
+
+#define OPT_RECURSIVE (1<<0) /* 'R' */
+#define OPT_CHANHES (1<<1) /* 'c' */
+#define OPT_NODEREFERENCE (1<<2) /* 'h' */
+#define OPT_QUIET (1<<3) /* 'f' */
+#define OPT_USER (1<<4) /* 'u' */
+#define OPT_ROLE (1<<5) /* 'r' */
+#define OPT_TYPE (1<<6) /* 't' */
+#define OPT_RANGE (1<<7) /* 'l' */
+#define OPT_VERBOSE (1<<8) /* 'v' */
+#define OPT_REFERENCE ((1<<9) * ENABLE_FEATURE_CHCON_LONG_OPTIONS)
+#define OPT_COMPONENT_SPECIFIED (OPT_USER | OPT_ROLE | OPT_TYPE | OPT_RANGE)
+
+static char *user = NULL;
+static char *role = NULL;
+static char *type = NULL;
+static char *range = NULL;
+static char *specified_context = NULL;
+
+static int change_filedir_context(const char *fname, struct stat *stbuf, void *userData, int depth)
+{
+ context_t context = NULL;
+ security_context_t file_context = NULL;
+ security_context_t context_string;
+ int rc = FALSE;
+ int status = 0;
+
+ if (option_mask32 & OPT_NODEREFERENCE) {
+ status = lgetfilecon(fname, &file_context);
+ } else {
+ status = getfilecon(fname, &file_context);
+ }
+ if (status < 0 && errno != ENODATA) {
+ if ((option_mask32 & OPT_QUIET) == 0)
+ bb_error_msg("cannot obtain security context: %s", fname);
+ goto skip;
+ }
+
+ if (file_context == NULL && specified_context == NULL) {
+ bb_error_msg("cannot apply partial context to unlabeled file %s", fname);
+ goto skip;
+ }
+
+ if (specified_context == NULL) {
+ context = set_security_context_component(file_context,
+ user, role, type, range);
+ if (!context) {
+ bb_error_msg("cannot compute security context from %s", file_context);
+ goto skip;
+ }
+ } else {
+ context = context_new(specified_context);
+ if (!context) {
+ bb_error_msg("invalid context: %s", specified_context);
+ goto skip;
+ }
+ }
+
+ context_string = context_str(context);
+ if (!context_string) {
+ bb_error_msg("cannot obtain security context in text expression");
+ goto skip;
+ }
+
+ if (file_context == NULL || strcmp(context_string, file_context) != 0) {
+ int fail;
+
+ if (option_mask32 & OPT_NODEREFERENCE) {
+ fail = lsetfilecon(fname, context_string);
+ } else {
+ fail = setfilecon(fname, context_string);
+ }
+ if ((option_mask32 & OPT_VERBOSE) || ((option_mask32 & OPT_CHANHES) && !fail)) {
+ printf(!fail
+ ? "context of %s changed to %s\n"
+ : "failed to change context of %s to %s\n",
+ fname, context_string);
+ }
+ if (!fail) {
+ rc = TRUE;
+ } else if ((option_mask32 & OPT_QUIET) == 0) {
+ bb_error_msg("failed to change context of %s to %s",
+ fname, context_string);
+ }
+ } else if (option_mask32 & OPT_VERBOSE) {
+ printf("context of %s retained as %s\n", fname, context_string);
+ rc = TRUE;
+ }
+skip:
+ /* FIXME: aren't these work ok on NULL ptr? Remove if() then */
+ if (context)
+ context_free(context);
+ if (file_context)
+ freecon(file_context);
+
+ return rc;
+}
+
+#if ENABLE_FEATURE_CHCON_LONG_OPTIONS
+static struct option chcon_options[] = {
+ { "recursive", 0, NULL, 'R' },
+ { "changes", 0, NULL, 'c' },
+ { "no-dereference", 0, NULL, 'h' },
+ { "silent", 0, NULL, 'f' },
+ { "quiet", 0, NULL, 'f' },
+ { "user", 1, NULL, 'u' },
+ { "role", 1, NULL, 'r' },
+ { "type", 1, NULL, 't' },
+ { "range", 1, NULL, 'l' },
+ { "verbose", 0, NULL, 'v' },
+ { "reference", 1, NULL, 0xff }, /* no short option */
+ { NULL, 0, NULL, 0 },
+};
+#endif
+
+int chcon_main(int argc, char *argv[]);
+int chcon_main(int argc, char *argv[])
+{
+ char *reference_file;
+ char *fname;
+ int i, errors = 0;
+
+#if ENABLE_FEATURE_CHCON_LONG_OPTIONS
+ applet_long_options = chcon_options;
+#endif
+ opt_complementary = "-1" /* at least 1 param */
+ ":?:f--v:v--f" /* 'verbose' and 'quiet' are exclusive */
+ ":\xff--urtl:u--\xff:r--\xff:t--\xff:l--\xff";
+ getopt32(argc, argv, "Rchf:u:r:t:l:v",
+ &user, &role, &type, &range, &reference_file);
+ argv += optind;
+
+#if ENABLE_FEATURE_CHCON_LONG_OPTIONS
+ if (option_mask32 & OPT_REFERENCE) {
+ /* FIXME: lgetfilecon() should be used when '-h' is specified.
+ But current implementation follows the original one. */
+ if (getfilecon(reference_file, &specified_context) < 0)
+ bb_perror_msg_and_die("getfilecon('%s') failed", reference_file);
+ } else
+#endif
+ if ((option_mask32 & OPT_COMPONENT_SPECIFIED) == 0) {
+ specified_context = *argv++;
+ /* specified_context is never NULL -
+ * "-1" in opt_complementary prevents this. */
+ if (!argv[0])
+ bb_error_msg_and_die("too few arguments");
+ }
+
+ for (i = 0; (fname = argv[i]) != NULL; i++) {
+ int fname_len = strlen(fname);
+ while (fname_len > 1 && fname[fname_len - 1] == '/')
+ fname_len--;
+ fname[fname_len] = '\0';
+
+ if (recursive_action(fname,
+ option_mask32 & OPT_RECURSIVE,
+ FALSE, /* followLinks */
+ FALSE, /* depthFirst */
+ change_filedir_context,
+ change_filedir_context,
+ NULL, 0) != TRUE)
+ errors = 1;
+ }
+ return errors;
+}
diff --git a/selinux/runcon.c b/selinux/runcon.c
new file mode 100644
index 000000000..24e436feb
--- /dev/null
+++ b/selinux/runcon.c
@@ -0,0 +1,137 @@
+/*
+ * runcon [ context |
+ * ( [ -c ] [ -r role ] [-t type] [ -u user ] [ -l levelrange ] )
+ * command [arg1 [arg2 ...] ]
+ *
+ * attempt to run the specified command with the specified context.
+ *
+ * -r role : use the current context with the specified role
+ * -t type : use the current context with the specified type
+ * -u user : use the current context with the specified user
+ * -l level : use the current context with the specified level range
+ * -c : compute process transition context before modifying
+ *
+ * Contexts are interpreted as follows:
+ *
+ * Number of MLS
+ * components system?
+ *
+ * 1 - type
+ * 2 - role:type
+ * 3 Y role:type:range
+ * 3 N user:role:type
+ * 4 Y user:role:type:range
+ * 4 N error
+ *
+ * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
+ * - based on coreutils-5.97 (in Fedora Core 6)
+ */
+#include "busybox.h"
+#include <getopt.h>
+#include <selinux/context.h>
+#include <selinux/flask.h>
+
+static context_t runcon_compute_new_context(char *user, char *role, char *type, char *range,
+ char *command, int compute_trans)
+{
+ context_t con;
+ security_context_t cur_context;
+
+ if (getcon(&cur_context))
+ bb_error_msg_and_die("cannot get current context");
+
+ if (compute_trans) {
+ security_context_t file_context, new_context;
+
+ if (getfilecon(command, &file_context) < 0)
+ bb_error_msg_and_die("cannot retrieve attributes of '%s'",
+ command);
+ if (security_compute_create(cur_context, file_context,
+ SECCLASS_PROCESS, &new_context))
+ bb_error_msg_and_die("unable to compute a new context");
+ cur_context = new_context;
+ }
+
+ con = context_new(cur_context);
+ if (!con)
+ bb_error_msg_and_die("'%s' is not a valid context", cur_context);
+ if (user && context_user_set(con, user))
+ bb_error_msg_and_die("failed to set new user '%s'", user);
+ if (type && context_type_set(con, type))
+ bb_error_msg_and_die("failed to set new type '%s'", type);
+ if (range && context_range_set(con, range))
+ bb_error_msg_and_die("failed to set new range '%s'", range);
+ if (role && context_role_set(con, role))
+ bb_error_msg_and_die("failed to set new role '%s'", role);
+
+ return con;
+}
+
+#if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
+static const struct option runcon_options[] = {
+ { "user", 1, NULL, 'u' },
+ { "role", 1, NULL, 'r' },
+ { "type", 1, NULL, 't' },
+ { "range", 1, NULL, 'l' },
+ { "compute", 0, NULL, 'c' },
+ { "help", 0, NULL, 'h' },
+ { NULL, 0, NULL, 0 },
+};
+#endif
+
+#define OPTS_ROLE (1<<0) /* r */
+#define OPTS_TYPE (1<<1) /* t */
+#define OPTS_USER (1<<2) /* u */
+#define OPTS_RANGE (1<<3) /* l */
+#define OPTS_COMPUTE (1<<4) /* c */
+#define OPTS_HELP (1<<5) /* h */
+#define OPTS_CONTEXT_COMPONENT (OPTS_ROLE | OPTS_TYPE | OPTS_USER | OPTS_RANGE)
+
+int runcon_main(int argc, char *argv[]);
+int runcon_main(int argc, char *argv[])
+{
+ char *role = NULL;
+ char *range = NULL;
+ char *user = NULL;
+ char *type = NULL;
+ char *context = NULL;
+ unsigned opts;
+ context_t con;
+
+ selinux_or_die();
+
+#if ENABLE_FEATURE_RUNCON_LONG_OPTIONS
+ applet_long_options = runcon_options;
+#endif
+ opt_complementary = "-1";
+ opts = getopt32(argc, argv, "r:t:u:l:ch", &role, &type, &user, &range);
+ argv += optind;
+
+ if (!(opts & OPTS_CONTEXT_COMPONENT)) {
+ context = *argv++;
+ if (!argv[0])
+ bb_error_msg_and_die("no command found");
+ }
+
+ if (context) {
+ con = context_new(context);
+ if (!con)
+ bb_error_msg_and_die("'%s' is not a valid context", context);
+ } else {
+ con = runcon_compute_new_context(user, role, type, range,
+ argv[0], opts & OPTS_COMPUTE);
+ }
+
+ if (security_check_context(context_str(con)))
+ bb_error_msg_and_die("'%s' is not a valid context",
+ context_str(con));
+
+ if (setexeccon(context_str(con)))
+ bb_error_msg_and_die("cannot set up security context '%s'",
+ context_str(con));
+
+ execvp(argv[0], argv);
+
+ bb_perror_msg_and_die("cannot execute '%s'", command);
+ return 1;
+}