[PATCH V4] selinux-testsuite: Add keys tests

* [PATCH V4] selinux-testsuite: Add keys tests
@ 2019-10-01 11:04 Richard Haines
  2019-10-01 17:23 ` Stephen Smalley
  0 siblings, 1 reply; 2+ messages in thread
From: Richard Haines @ 2019-10-01 11:04 UTC (permalink / raw)
  To: selinux; +Cc: sds, Richard Haines

Test all permissions associated with the key class.

Note that kernel 5.3 commit keys: Fix request_key() lack of Link perm
check on found key ("504b69eb3c95180bc59f1ae9096ad4b10bbbf254")
added an additional check for link perm on request_key(). The tests
will support earlier kernels.

Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
---
V2 Changes:
Added test permission checks between a keyring created by another process
Split out key_socket tests
V3 Changes:
Fixed KEYCTL_SESSION_TO_PARENT: Operation not permitted
Remove kernel 5.X checks as not yet relevant
Tested on latest Fedora 30 + Rawhide from user->su->make test
V4 Change:
.gitignore request_key to request_keys

 README.md                    |   4 +-
 defconfig                    |   7 ++
 policy/Makefile              |   4 +
 policy/test_global.te        |   2 +-
 policy/test_keys.te          | 226 +++++++++++++++++++++++++++++++++++
 tests/Makefile               |   4 +
 tests/keys/.gitignore        |   4 +
 tests/keys/Makefile          |   7 ++
 tests/keys/keyctl.c          | 188 +++++++++++++++++++++++++++++
 tests/keys/keyctl_relabel.c  |  93 ++++++++++++++
 tests/keys/keyring_service.c | 166 +++++++++++++++++++++++++
 tests/keys/keys_common.h     |  16 +++
 tests/keys/request_keys.c    | 138 +++++++++++++++++++++
 tests/keys/test              | 109 +++++++++++++++++
 14 files changed, 966 insertions(+), 2 deletions(-)
 create mode 100644 policy/test_keys.te
 create mode 100644 tests/keys/.gitignore
 create mode 100644 tests/keys/Makefile
 create mode 100644 tests/keys/keyctl.c
 create mode 100644 tests/keys/keyctl_relabel.c
 create mode 100644 tests/keys/keyring_service.c
 create mode 100644 tests/keys/keys_common.h
 create mode 100644 tests/keys/request_keys.c
 create mode 100755 tests/keys/test

diff --git a/README.md b/README.md
index 1396c8e..e845df8 100644
--- a/README.md
+++ b/README.md
@@ -52,6 +52,7 @@ similar dependencies):
 * lksctp-tools-devel _(to build the SCTP test programs)_
 * attr _(tools used by the overlayfs tests)_
 * libbpf-devel _(tools used by the bpf tests)_
+* keyutils-libs-devel _(tools used by the keys tests)_
 
 On a modern Fedora system you can install these dependencies with the
 following command:
@@ -67,7 +68,8 @@ following command:
 		iptables \
 		lksctp-tools-devel \
 		attr \
-		libbpf-devel
+		libbpf-devel \
+		keyutils-libs-devel
 
 The testsuite requires a pre-existing base policy configuration of SELinux,
 using either the old example policy or the reference policy as the baseline.
diff --git a/defconfig b/defconfig
index cb57f22..b13075d 100644
--- a/defconfig
+++ b/defconfig
@@ -67,3 +67,10 @@ CONFIG_ANDROID_BINDERFS=y
 # They are not required for SELinux operation itself.
 CONFIG_BPF=y
 CONFIG_BPF_SYSCALL=y
+
+# Keys implementation.
+# These are enabled to test the key controls in tests/keys; they are
+# not required for SELinux operation itself.
+CONFIG_KEYS=y
+CONFIG_KEYS_COMPAT=y
+CONFIG_KEY_DH_OPERATIONS=y
diff --git a/policy/Makefile b/policy/Makefile
index a5942b3..5c2c438 100644
--- a/policy/Makefile
+++ b/policy/Makefile
@@ -82,6 +82,10 @@ ifeq ($(shell grep -q bpf $(POLDEV)/include/support/all_perms.spt && echo true),
 TARGETS += test_bpf.te test_fdreceive_bpf.te test_binder_bpf.te
 endif
 
+ifeq ($(shell grep -q all_key_perms $(POLDEV)/include/support/all_perms.spt && echo true),true)
+TARGETS += test_keys.te
+endif
+
 ifeq (x$(DISTRO),$(filter x$(DISTRO),xRHEL4 xRHEL5 xRHEL6))
 TARGETS:=$(filter-out test_overlayfs.te test_mqueue.te test_ibpkey.te, $(TARGETS))
 endif
diff --git a/policy/test_global.te b/policy/test_global.te
index b77e025..90f9b65 100644
--- a/policy/test_global.te
+++ b/policy/test_global.te
@@ -42,7 +42,7 @@ allow testdomain self:process setfscreate;
 
 # General permissions commonly required for test operation.
 # general_domain_access
-allow testdomain self:process ~{ptrace setcurrent setexec setfscreate setrlimit execmem execstack execheap};
+allow testdomain self:process ~{ptrace setcurrent setexec setfscreate setrlimit execmem execstack execheap setkeycreate};
 allow testdomain self:fd use;
 allow testdomain self:fifo_file rw_file_perms;
 allow testdomain self:unix_dgram_socket create_socket_perms;
diff --git a/policy/test_keys.te b/policy/test_keys.te
new file mode 100644
index 0000000..78c0663
--- /dev/null
+++ b/policy/test_keys.te
@@ -0,0 +1,226 @@
+#
+################# KEY selinux-testsuite policy module ######################
+#
+attribute keydomain;
+
+#
+############################## Define Macro ################################
+#
+# Do not use domain_type() macro as it has allow 'key { link search }'
+# in base module so 'allow domain self:key ~{ link search };' will not work
+# here. Add these instead to allow key perms to be controlled by this module.
+#
+gen_require(`
+	type setrans_var_run_t, syslogd_t;
+')
+
+define(`key_domain_type',`
+	allow $1 proc_t:dir { search };
+	allow $1 proc_t:lnk_file { read };
+	allow $1 self:dir { search };
+	allow $1 self:file { open read write };
+	dontaudit init_t syslogd_t:fd use;
+	dontaudit $1 security_t:filesystem getattr;
+	dontaudit $1 self:file getattr;
+	dontaudit $1 setrans_var_run_t:dir search;
+	dontaudit unconfined_t $1:process { noatsecure rlimitinh siginh };
+')
+
+#
+####################### Main key class tests #####################
+#
+type test_key_t;
+key_domain_type(test_key_t)
+unconfined_runs_test(test_key_t)
+typeattribute test_key_t testdomain;
+typeattribute test_key_t keydomain;
+
+allow test_key_t self:process { setkeycreate };
+allow test_key_t self:key { create write search read view link setattr };
+
+# Set new context on a keyring:
+type test_newcon_key_t;
+key_domain_type(test_newcon_key_t)
+unconfined_runs_test(test_newcon_key_t)
+typeattribute test_newcon_key_t testdomain;
+typeattribute test_newcon_key_t keydomain;
+
+allow test_key_t test_newcon_key_t:key { create write search view };
+
+################# Deny process { setkeycreate } #######################
+type test_no_setkeycreate_t;
+key_domain_type(test_no_setkeycreate_t)
+unconfined_runs_test(test_no_setkeycreate_t)
+typeattribute test_no_setkeycreate_t testdomain;
+typeattribute test_no_setkeycreate_t keydomain;
+
+###################### Deny key { create } ###########################
+type test_key_no_create_t;
+key_domain_type(test_key_no_create_t)
+unconfined_runs_test(test_key_no_create_t)
+typeattribute test_key_no_create_t testdomain;
+typeattribute test_key_no_create_t keydomain;
+
+allow test_key_no_create_t self:process { setkeycreate };
+allow test_key_no_create_t self:key { write search read view link setattr };
+
+###################### Deny key { write } ###########################
+type test_key_no_write_t;
+key_domain_type(test_key_no_write_t)
+unconfined_runs_test(test_key_no_write_t)
+typeattribute test_key_no_write_t testdomain;
+typeattribute test_key_no_write_t keydomain;
+
+allow test_key_no_write_t self:process { setkeycreate };
+allow test_key_no_write_t self:key { create search read view link setattr };
+
+###################### Deny key { search } ###########################
+type test_key_no_search_t;
+key_domain_type(test_key_no_search_t)
+unconfined_runs_test(test_key_no_search_t)
+typeattribute test_key_no_search_t testdomain;
+typeattribute test_key_no_search_t keydomain;
+
+allow test_key_no_search_t self:process { setkeycreate };
+allow test_key_no_search_t self:key { create write read view link setattr };
+
+###################### Deny key { view } ###########################
+type test_key_no_view_t;
+key_domain_type(test_key_no_view_t)
+unconfined_runs_test(test_key_no_view_t)
+typeattribute test_key_no_view_t testdomain;
+typeattribute test_key_no_view_t keydomain;
+
+allow test_key_no_view_t self:process { setkeycreate };
+allow test_key_no_view_t self:key { create write search read link setattr };
+
+###################### Deny key { read } ###########################
+type test_key_no_read_t;
+key_domain_type(test_key_no_read_t)
+unconfined_runs_test(test_key_no_read_t)
+typeattribute test_key_no_read_t testdomain;
+typeattribute test_key_no_read_t keydomain;
+
+allow test_key_no_read_t self:process { setkeycreate };
+allow test_key_no_read_t self:key { create write search view link setattr };
+
+###################### Deny key { link } ###########################
+type test_key_no_link_t;
+key_domain_type(test_key_no_link_t)
+unconfined_runs_test(test_key_no_link_t)
+typeattribute test_key_no_link_t testdomain;
+typeattribute test_key_no_link_t keydomain;
+
+allow test_key_no_link_t self:process { setkeycreate };
+allow test_key_no_link_t self:key { create write search read view setattr };
+
+###################### Deny key { setattr } ###########################
+type test_key_no_setattr_t;
+key_domain_type(test_key_no_setattr_t)
+unconfined_runs_test(test_key_no_setattr_t)
+typeattribute test_key_no_setattr_t testdomain;
+typeattribute test_key_no_setattr_t keydomain;
+
+allow test_key_no_setattr_t self:process { setkeycreate };
+allow test_key_no_setattr_t self:key { create write search read view link };
+
+#
+############## keyring_service / request_keys process tests ###############
+#
+# Check between a process and a keyring created by another process in a
+# different security context.
+#
+type test_keyring_service_t;
+key_domain_type(test_keyring_service_t)
+unconfined_runs_test(test_keyring_service_t)
+typeattribute test_keyring_service_t testdomain;
+typeattribute test_keyring_service_t keydomain;
+
+allow test_keyring_service_t self:process { setkeycreate };
+allow test_keyring_service_t self:key { create write search read view link setattr };
+
+allow test_keyring_service_t test_file_t:file execute_no_trans;
+allow test_keyring_service_t self : process { dyntransition };
+allow test_keyring_service_t test_request_keys_t:process dyntransition;
+allow test_keyring_service_t test_request_keys_no_search_t:process dyntransition;
+allow test_keyring_service_t test_request_keys_no_read_t:process dyntransition;
+allow test_keyring_service_t test_request_keys_no_write_t:process dyntransition;
+allow test_keyring_service_t test_request_keys_no_view_t:process dyntransition;
+allow test_keyring_service_t test_request_keys_no_setattr_t:process dyntransition;
+allow test_keyring_service_t test_request_keys_no_link_t:process dyntransition;
+
+################################# request_keys ############################
+type test_request_keys_t;
+key_domain_type(test_request_keys_t)
+unconfined_runs_test(test_request_keys_t)
+typeattribute test_request_keys_t testdomain;
+typeattribute test_request_keys_t keydomain;
+
+allow test_request_keys_t self:key { create write search read view link setattr };
+allow test_request_keys_t test_keyring_service_t:key { search read write view link setattr };
+
+################### request_keys deny { search } ############################
+type test_request_keys_no_search_t;
+key_domain_type(test_request_keys_no_search_t)
+unconfined_runs_test(test_request_keys_no_search_t)
+typeattribute test_request_keys_no_search_t testdomain;
+typeattribute test_request_keys_no_search_t keydomain;
+
+allow test_request_keys_no_search_t self:key { create write search read view link setattr };
+allow test_request_keys_no_search_t test_keyring_service_t:key { write link view setattr };
+
+################### request_keys deny { read } ############################
+type test_request_keys_no_read_t;
+key_domain_type(test_request_keys_no_read_t)
+unconfined_runs_test(test_request_keys_no_read_t)
+typeattribute test_request_keys_no_read_t testdomain;
+typeattribute test_request_keys_no_read_t keydomain;
+
+allow test_request_keys_no_read_t self:key { create write search read view link setattr };
+allow test_request_keys_no_read_t test_keyring_service_t:key { write search view setattr link };
+
+################### request_keys deny { write } ############################
+type test_request_keys_no_write_t;
+key_domain_type(test_request_keys_no_write_t)
+unconfined_runs_test(test_request_keys_no_write_t)
+typeattribute test_request_keys_no_write_t testdomain;
+typeattribute test_request_keys_no_write_t keydomain;
+
+allow test_request_keys_no_write_t self:key { create write search read view link setattr };
+allow test_request_keys_no_write_t test_keyring_service_t:key { read search view setattr link };
+
+################### request_keys deny { view } ############################
+type test_request_keys_no_view_t;
+key_domain_type(test_request_keys_no_view_t)
+unconfined_runs_test(test_request_keys_no_view_t)
+typeattribute test_request_keys_no_view_t testdomain;
+typeattribute test_request_keys_no_view_t keydomain;
+
+allow test_request_keys_no_view_t self:key { create write search read view link setattr };
+allow test_request_keys_no_view_t test_keyring_service_t:key { search write setattr link };
+
+################### request_keys deny { setattr } ############################
+type test_request_keys_no_setattr_t;
+key_domain_type(test_request_keys_no_setattr_t)
+unconfined_runs_test(test_request_keys_no_setattr_t)
+typeattribute test_request_keys_no_setattr_t testdomain;
+typeattribute test_request_keys_no_setattr_t keydomain;
+
+allow test_request_keys_no_setattr_t self:key { create write search read view link setattr };
+allow test_request_keys_no_setattr_t test_keyring_service_t:key { search read write link view };
+
+################### request_keys deny { link } ############################
+type test_request_keys_no_link_t;
+key_domain_type(test_request_keys_no_link_t)
+unconfined_runs_test(test_request_keys_no_link_t)
+typeattribute test_request_keys_no_link_t testdomain;
+typeattribute test_request_keys_no_link_t keydomain;
+
+allow test_request_keys_no_link_t self:key { create write search read view link setattr };
+allow test_request_keys_no_link_t test_keyring_service_t:key { read write search view setattr };
+
+#
+########### Allow these domains to be entered from sysadm domain ############
+#
+miscfiles_domain_entry_test_files(keydomain)
+userdom_sysadm_entry_spec_domtrans_to(keydomain)
diff --git a/tests/Makefile b/tests/Makefile
index e5bdfff..42f7f40 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -48,6 +48,10 @@ export CFLAGS += -DHAVE_BPF
 endif
 endif
 
+ifeq ($(shell grep -q all_key_perms $(POLDEV)/include/support/all_perms.spt && echo true),true)
+SUBDIRS += keys
+endif
+
 ifeq ($(shell grep "^SELINUX_INFINIBAND_ENDPORT_TEST=" infiniband_endport/ibendport_test.conf | cut -d'=' -f 2),1)
 SUBDIRS += infiniband_endport
 endif
diff --git a/tests/keys/.gitignore b/tests/keys/.gitignore
new file mode 100644
index 0000000..3ce6465
--- /dev/null
+++ b/tests/keys/.gitignore
@@ -0,0 +1,4 @@
+keyctl
+keyctl_relabel
+keyring_service
+request_keys
diff --git a/tests/keys/Makefile b/tests/keys/Makefile
new file mode 100644
index 0000000..d3793db
--- /dev/null
+++ b/tests/keys/Makefile
@@ -0,0 +1,7 @@
+TARGETS = keyctl keyctl_relabel keyring_service request_keys
+LDLIBS += -lselinux -lkeyutils
+
+all: $(TARGETS)
+
+clean:
+	rm -f $(TARGETS)
diff --git a/tests/keys/keyctl.c b/tests/keys/keyctl.c
new file mode 100644
index 0000000..5aff8d8
--- /dev/null
+++ b/tests/keys/keyctl.c
@@ -0,0 +1,188 @@
+#include "keys_common.h"
+
+static void usage(char *progname)
+{
+	fprintf(stderr,
+		"usage:  %s [-v]\n"
+		"Where:\n\t"
+		"-v  Print information.\n", progname);
+	exit(-1);
+}
+
+int main(int argc, char *argv[])
+{
+	int opt, nr, result;
+	unsigned int timeout = 5;
+	char *context, *keycreate_con, type[20], desc[30];
+	char r_con[256];
+	bool verbose = false;
+	key_serial_t retrieved, search, link, compute,
+		     private, prime, base, test_key;
+	struct keyctl_dh_params params;
+
+	while ((opt = getopt(argc, argv, "v")) != -1) {
+		switch (opt) {
+		case 'v':
+			verbose = true;
+			break;
+		default:
+			usage(argv[0]);
+		}
+	}
+
+	result = getcon(&context);
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain process context\n");
+		exit(1);
+	}
+	if (verbose)
+		printf("Process context:\n\t%s\n", context);
+
+	result = getkeycreatecon(&keycreate_con);
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain keycreate context\n");
+		exit(2);
+	}
+	if (verbose)
+		printf("Current keycreate context:\n\t%s\n", keycreate_con);
+	free(keycreate_con);
+
+	/* Set context requires key { create } and process { setkeycreate } */
+	result = setkeycreatecon(context);
+	if (result < 0) {
+		fprintf(stderr, "Failed setkeycreatecon(): %s\n",
+			strerror(errno));
+		exit(3);
+	}
+	if (verbose)
+		printf("Set keycreate context:\n\t%s\n", context);
+	free(context);
+
+	result = getkeycreatecon(&keycreate_con);
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain keycreate context\n");
+		exit(4);
+	}
+	if (verbose)
+		printf("New keycreate context:\n\t%s\n", keycreate_con);
+	free(keycreate_con);
+
+	/*
+	 * Add three keys to the KEY_SPEC_PROCESS_KEYRING as these will be
+	 * required by the keyctl(KEYCTL_DH_COMPUTE, ..) function.
+	 * These require key { create write } permissions.
+	 */
+	private = add_key("user", "private", payload, strlen(payload),
+			  KEY_SPEC_PROCESS_KEYRING);
+	if (private < 0) {
+		fprintf(stderr, "Failed add_key(private): %s\n",
+			strerror(errno));
+		exit(5);
+	}
+
+	prime = add_key("user", "prime", payload, strlen(payload),
+			KEY_SPEC_PROCESS_KEYRING);
+	if (prime < 0) {
+		fprintf(stderr, "Failed add_key(prime): %s\n",
+			strerror(errno));
+		exit(5);
+	}
+
+	base = add_key("user", "base", payload, strlen(payload),
+		       KEY_SPEC_PROCESS_KEYRING);
+	if (base < 0) {
+		fprintf(stderr, "Failed add_key(base): %s\n",
+			strerror(errno));
+		exit(5);
+	}
+
+	if (verbose) {
+		printf("Private key ID: 0x%x\n", private);
+		printf("Prime key ID:   0x%x\n", prime);
+		printf("Base key ID:    0x%x\n", base);
+	}
+
+	/* Requires key { search }. From kernel 5.3 requires { link } */
+	retrieved = request_key("user", "private", NULL,
+				KEY_SPEC_PROCESS_KEYRING);
+	if (retrieved < 0) {
+		fprintf(stderr, "Failed to request 'private' key: %s\n",
+			strerror(errno));
+		exit(6);
+	}
+
+	/* Requires key { search } */
+	search = keyctl(KEYCTL_SEARCH, KEY_SPEC_PROCESS_KEYRING,
+			"user", "base", 0);
+	if (search < 0) {
+		fprintf(stderr, "Failed to find 'base' key: %s\n",
+			strerror(errno));
+		exit(7);
+	}
+
+	/* Requires key { view } */
+	result = keyctl(KEYCTL_GET_SECURITY, private, r_con, sizeof(r_con));
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain 'private' key context: %s\n",
+			strerror(errno));
+		exit(8);
+	}
+
+	if (verbose) {
+		printf("Requested 'private' key ID: 0x%x\n", retrieved);
+		printf("Searched 'base' key ID:     0x%x\n", search);
+		printf("Searched 'base' key context:\n\t%s\n", r_con);
+	}
+
+	/* Compute DH key, only obtain the length for test, not the key. */
+	params.priv = private;
+	params.prime = prime;
+	params.base = base;
+
+	/* Requires key { create read write } */
+	compute = keyctl(KEYCTL_DH_COMPUTE, &params, NULL, 0, 0);
+	if (compute < 0) {
+		fprintf(stderr, "Failed KEYCTL_DH_COMPUTE: %s\n",
+			strerror(errno));
+		exit(9);
+	}
+	if (verbose)
+		printf("KEYCTL_DH_COMPUTE key ID size: %d\n", compute);
+
+	/* Requires key { write link } */
+	link = keyctl(KEYCTL_LINK, base, KEY_SPEC_PROCESS_KEYRING);
+	if (link < 0) {
+		fprintf(stderr, "Failed KEYCTL_LINK: %s\n",
+			strerror(errno));
+		exit(10);
+	}
+	if (verbose)
+		printf("Link key ID:    0x%x\n", KEY_SPEC_PROCESS_KEYRING);
+
+	/* Requires key { setattr } */
+	link = keyctl(KEYCTL_SET_TIMEOUT, base, timeout);
+	if (link < 0) {
+		fprintf(stderr, "Failed KEYCTL_SET_TIMEOUT: %s\n",
+			strerror(errno));
+		exit(11);
+	}
+	if (verbose) {
+		test_key = keyctl(KEYCTL_DESCRIBE, base, r_con, sizeof(r_con));
+		if (test_key < 0) {
+			fprintf(stderr, "Failed KEYCTL_DESCRIBE: %s\n",
+				strerror(errno));
+			exit(11);
+		}
+		result = sscanf(r_con, "%[^;];%d;%d;%x;%s",
+				type, &nr, &nr, &nr, desc);
+		if (result < 0) {
+			fprintf(stderr, "Failed sscanf(): %s\n",
+				strerror(errno));
+			exit(11);
+		}
+		printf("Set %d second timeout on key Type: '%s' Description: '%s'\n",
+		       timeout, type, desc);
+	}
+
+	return 0;
+}
diff --git a/tests/keys/keyctl_relabel.c b/tests/keys/keyctl_relabel.c
new file mode 100644
index 0000000..7bab510
--- /dev/null
+++ b/tests/keys/keyctl_relabel.c
@@ -0,0 +1,93 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <keyutils.h>
+#include <selinux/selinux.h>
+
+static void usage(char *progname)
+{
+	fprintf(stderr,
+		"usage:  %s [-v] newcon\n"
+		"Where:\n\t"
+		"-v      Print information.\n\t"
+		"newcon  New keyring context.\n", progname);
+	exit(-1);
+}
+
+int main(int argc, char *argv[])
+{
+	int opt, result;
+	char *context, *keycreate_con;
+	char r_con[256];
+	bool verbose = false;
+	key_serial_t newring;
+
+	while ((opt = getopt(argc, argv, "v")) != -1) {
+		switch (opt) {
+		case 'v':
+			verbose = true;
+			break;
+		default:
+			usage(argv[0]);
+		}
+	}
+
+	if (optind >= argc)
+		usage(argv[0]);
+
+	result = getcon(&context);
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain process context\n");
+		exit(1);
+	}
+	if (verbose)
+		printf("Process context: %s\n", context);
+	free(context);
+
+	result = setkeycreatecon(argv[optind]);
+	if (result < 0) {
+		fprintf(stderr, "Failed setkeycreatecon(): %s\n",
+			strerror(errno));
+		exit(2);
+	}
+
+	result = getkeycreatecon(&keycreate_con);
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain keycreate context\n");
+		exit(3);
+	}
+	if (verbose)
+		printf("New keycreate context: %s\n", keycreate_con);
+	free(keycreate_con);
+
+	newring = add_key("keyring", "my-keyring", NULL, 0,
+			  KEY_SPEC_PROCESS_KEYRING);
+	if (newring < 0) {
+		fprintf(stderr, "Failed to add new keyring: %s\n",
+			strerror(errno));
+		exit(4);
+	}
+
+	result = keyctl(KEYCTL_GET_SECURITY, newring, r_con, sizeof(r_con));
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain key context: %s\n",
+			strerror(errno));
+		exit(5);
+	}
+
+	if (strcmp(argv[optind], r_con)) {
+		fprintf(stderr, "Relabel error - expected: %s got: %s\n",
+			argv[optind], r_con);
+		exit(6);
+	}
+
+	if (verbose) {
+		printf("'my-keyring' key ID: 0x%x\n", newring);
+		printf("'my-keyring' context:\n\t%s\n", r_con);
+	}
+
+	return 0;
+}
diff --git a/tests/keys/keyring_service.c b/tests/keys/keyring_service.c
new file mode 100644
index 0000000..e5dcab0
--- /dev/null
+++ b/tests/keys/keyring_service.c
@@ -0,0 +1,166 @@
+#include "keys_common.h"
+
+static void usage(char *progname)
+{
+	fprintf(stderr,
+		"usage:  %s [-v] newdomain program\n"
+		"Where:\n\t"
+		"newdomain  Type for new domain.\n\t"
+		"program    Program to be exec'd.\n\t"
+		"-v         Print information.\n", progname);
+	exit(-1);
+}
+
+int main(int argc, char **argv)
+{
+	int opt, pid, result, status;
+	bool verbose;
+	char *context_s, *request_keys_argv[4] = { NULL };
+	context_t context;
+	key_serial_t private, prime, base, newring;
+
+	verbose = false;
+
+	while ((opt = getopt(argc, argv, "v")) != -1) {
+		switch (opt) {
+		case 'v':
+			verbose = true;
+			request_keys_argv[2] = strdup("-v");
+			break;
+		default:
+			usage(argv[0]);
+		}
+	}
+
+	if (argc - optind != 2)
+		usage(argv[0]);
+
+	if (verbose)
+		printf("%s process information:\n", argv[0]);
+
+	result = getcon(&context_s);
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain process context\n");
+		exit(1);
+	}
+	if (verbose)
+		printf("\tProcess context:\n\t\t%s\n", context_s);
+
+	/* Set context requires process { setkeycreate } and key { create } */
+	result = setkeycreatecon(context_s);
+	if (result < 0) {
+		fprintf(stderr, "Failed setkeycreatecon(): %s\n",
+			strerror(errno));
+		exit(3);
+	}
+	if (verbose)
+		printf("\tSet keycreate context:\n\t\t%s\n", context_s);
+
+	context = context_new(context_s);
+	if (!context) {
+		fprintf(stderr, "Unable to create context structure\n");
+		exit(2);
+	}
+	free(context_s);
+
+	if (context_type_set(context, argv[optind])) {
+		fprintf(stderr, "Unable to set new type\n");
+		exit(3);
+	}
+
+	context_s = context_str(context);
+	if (!context_s) {
+		fprintf(stderr, "Unable to obtain new context string\n");
+		exit(4);
+	}
+	if (verbose)
+		printf("\t%s process context will transition to:\n\t\t%s\n",
+		       argv[optind], context_s);
+
+	/*
+	 * This sets up the environment the for 'request_keys' service when it
+	 * calls: keyctl(KEYCTL_SESSION_TO_PARENT)
+	 */
+	newring = keyctl(KEYCTL_JOIN_SESSION_KEYRING, "test-session");
+	if (newring < 0) {
+		fprintf(stderr, "Failed KEYCTL_JOIN_SESSION_KEYRING,: %s\n",
+			strerror(errno));
+		exit(5);
+	}
+	if (verbose)
+		printf("\tKEYCTL_JOIN_SESSION_KEYRING newkey ID: 0x%x\n",
+		       newring);
+
+	private = add_key("user", "private", payload, strlen(payload),
+			  KEY_SPEC_SESSION_KEYRING);
+	if (private < 0) {
+		fprintf(stderr, "Failed add_key(private): %s\n",
+			strerror(errno));
+		exit(6);
+	}
+
+	prime = add_key("user", "prime", payload, strlen(payload),
+			KEY_SPEC_SESSION_KEYRING);
+	if (prime < 0) {
+		fprintf(stderr, "Failed add_key(prime): %s\n",
+			strerror(errno));
+		exit(6);
+	}
+
+	base = add_key("user", "base", payload, strlen(payload),
+		       KEY_SPEC_SESSION_KEYRING);
+	if (base < 0) {
+		fprintf(stderr, "Failed add_key(base): %s\n",
+			strerror(errno));
+		exit(6);
+	}
+	if (verbose) {
+		printf("\tAdded 'private' key ID: 0x%x\n", private);
+		printf("\tAdded 'prime'   key ID: 0x%x\n", prime);
+		printf("\tAdded 'base'    key ID: 0x%x\n", base);
+	}
+
+	pid = fork();
+	if (pid < 0) {
+		fprintf(stderr, "fork failed: %s\n", strerror(errno));
+		exit(9);
+	} else if (pid == 0) {
+		signal(SIGTRAP, SIG_IGN);
+		request_keys_argv[0] = strdup(argv[optind + 1]);
+		request_keys_argv[1] = strdup(context_s);
+		if (verbose)
+			printf("\tExec parameters:\n\t\t%s\n\t\t%s\n\t\t%s\n",
+			       request_keys_argv[0],
+			       request_keys_argv[1],
+			       request_keys_argv[2]);
+
+		execv(request_keys_argv[0], request_keys_argv);
+		fprintf(stderr, "execv of: %s failed: %s\n",
+			request_keys_argv[0], strerror(errno));
+		exit(10);
+	}
+
+	pid = wait(&status);
+	if (pid < 0) {
+		fprintf(stderr, "wait() failed: %s\n", strerror(errno));
+		exit(11);
+	}
+
+	if (WIFEXITED(status)) {
+		fprintf(stderr, "%s exited with status: %d\n",
+			argv[optind + 1], WEXITSTATUS(status));
+		exit(WEXITSTATUS(status));
+	}
+
+	if (WIFSIGNALED(status)) {
+		fprintf(stderr, "%s terminated by signal: %d\n",
+			argv[optind + 1], WTERMSIG(status));
+		fprintf(stderr,
+			"..This is consistent with a %s permission denial - check the audit log.\n",
+			argv[optind + 1]);
+		exit(12);
+	}
+
+	fprintf(stderr, "Unexpected exit status 0x%x\n", status);
+	exit(-1);
+}
diff --git a/tests/keys/keys_common.h b/tests/keys/keys_common.h
new file mode 100644
index 0000000..df15280
--- /dev/null
+++ b/tests/keys/keys_common.h
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <sys/wait.h>
+#include <keyutils.h>
+#include <selinux/selinux.h>
+#include <selinux/context.h>
+
+/* This is used as the payload for each add_key() */
+static const char payload[] =
+	" -----BEGIN PUBLIC KEY-----\nMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDN4FHsPjlJf03r9KfNt1Ma9/D6\nQDEiR/cfhZrNUPgHRresult+E4dj52VJSonPFJ6HaLlUi5pZq2t1LqPNrMfFKCNn12m+\nWw4aduBJM7u1RUPSNxrlfDAJZkdtNALOO/ds3U93hZrxOYNetzbnjILDu5JT1nbI\n4aC60SkdlCw1TxmvXwIDAQAB\n-----END PUBLIC KEY-----\n";
diff --git a/tests/keys/request_keys.c b/tests/keys/request_keys.c
new file mode 100644
index 0000000..43b20d9
--- /dev/null
+++ b/tests/keys/request_keys.c
@@ -0,0 +1,138 @@
+#include "keys_common.h"
+
+int main(int argc, char **argv)
+{
+	int result, nr;
+	unsigned int timeout = 5;
+	char r_con[512], type[20], desc[30], *context;
+	bool verbose = false;
+	key_serial_t private, prime, base, compute, test_key;
+	struct keyctl_dh_params params;
+
+	/*
+	 * There are two parameters passed:
+	 *    1 - The security context for setcon(3)
+	 *    2 - Verbose mode
+	 */
+	if (argv[2] != NULL)
+		verbose = true;
+
+	if (verbose)
+		printf("%s process information:\n", argv[0]);
+
+	/*
+	 * Use setcon() as policy will not allow multiple type_transition
+	 * statements using the same target with different process types.
+	 */
+	result = setcon(argv[1]);
+	if (result < 0) {
+		fprintf(stderr, "setcon() failed to set process context: %s\n",
+			argv[1]);
+		exit(1);
+	}
+
+	result = getcon(&context);
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain process context\n");
+		exit(2);
+	}
+	if (verbose)
+		printf("\tProcess context:\n\t\t%s\n", context);
+
+	free(context);
+
+	/*
+	 * Join this session to the parent as ./keyring_service executed:
+	 *    keyctl(KEYCTL_JOIN_SESSION_KEYRING, "test-session")
+	 *
+	 * Requires key { link }
+	 */
+	test_key = keyctl(KEYCTL_SESSION_TO_PARENT);
+	if (test_key < 0) {
+		fprintf(stderr, "Failed KEYCTL_SESSION_TO_PARENT: %s\n",
+			strerror(errno));
+		exit(3);
+	}
+
+	/* Requires key { view } */
+	result = keyctl(KEYCTL_GET_SECURITY, KEY_SPEC_SESSION_KEYRING,
+			r_con, sizeof(r_con));
+	if (result < 0) {
+		fprintf(stderr, "Failed to obtain parent session context: %s\n",
+			strerror(errno));
+		exit(4);
+	}
+	if (verbose)
+		printf("\tJoined session to parent. Parent keyring context:\n\t\t%s\n",
+		       r_con);
+
+	/* Requires key { search write }. From kernel 5.3 requires { link } */
+	private = request_key("user", "private", NULL,
+			      KEY_SPEC_SESSION_KEYRING);
+	if (private < 0) {
+		fprintf(stderr, "Failed to request 'private' key: %s\n",
+			strerror(errno));
+		exit(5);
+	}
+
+	prime = request_key("user", "prime", NULL, KEY_SPEC_SESSION_KEYRING);
+	if (prime < 0) {
+		fprintf(stderr, "Failed to request 'prime' key: %s\n",
+			strerror(errno));
+		exit(5);
+	}
+
+	base = request_key("user", "base", NULL, KEY_SPEC_SESSION_KEYRING);
+	if (base < 0) {
+		fprintf(stderr, "Failed to request 'base' key: %s\n",
+			strerror(errno));
+		exit(5);
+	}
+	if (verbose) {
+		printf("\tRequested 'private' key ID: 0x%x\n", private);
+		printf("\tRequested 'prime'   key ID: 0x%x\n", prime);
+		printf("\tRequested 'base'    key ID: 0x%x\n", base);
+	}
+
+	/* Requires key { setattr } */
+	test_key = keyctl(KEYCTL_SET_TIMEOUT, base, timeout);
+	if (test_key < 0) {
+		fprintf(stderr, "Failed KEYCTL_SET_TIMEOUT: %s\n",
+			strerror(errno));
+		exit(6);
+	}
+	if (verbose) {
+		test_key = keyctl(KEYCTL_DESCRIBE, base, r_con, sizeof(r_con));
+		if (test_key < 0) {
+			fprintf(stderr, "Failed KEYCTL_DESCRIBE: %s\n",
+				strerror(errno));
+			exit(7);
+		}
+		result = sscanf(r_con, "%[^;];%d;%d;%x;%s",
+				type, &nr, &nr, &nr, desc);
+		if (result < 0) {
+			fprintf(stderr, "Failed sscanf(): %s\n",
+				strerror(errno));
+			exit(7);
+		}
+		printf("\tSet %d second timeout on key Type: '%s' Description: '%s'\n",
+		       timeout, type, desc);
+	}
+
+	/* Compute DH key, only obtain the length for test, not the key. */
+	params.priv = private;
+	params.prime = prime;
+	params.base = base;
+
+	/* Requires key { read write } */
+	compute = keyctl(KEYCTL_DH_COMPUTE, &params, NULL, 0, 0);
+	if (compute < 0) {
+		fprintf(stderr, "Failed KEYCTL_DH_COMPUTE: %s\n",
+			strerror(errno));
+		exit(8);
+	}
+	if (verbose)
+		printf("\tKEYCTL_DH_COMPUTE key ID size: %d\n", compute);
+
+	exit(0);
+}
diff --git a/tests/keys/test b/tests/keys/test
new file mode 100755
index 0000000..2dafb17
--- /dev/null
+++ b/tests/keys/test
@@ -0,0 +1,109 @@
+#!/usr/bin/perl
+use Test::More;
+
+BEGIN {
+    $basedir = $0;
+    $basedir =~ s|(.*)/[^/]*|$1|;
+
+    $test_count = 17;
+
+    # allow info to be shown during tests
+    $v = $ARGV[0];
+    if ($v) {
+        if ( $v ne "-v" ) {
+            plan skip_all => "Invalid option (use -v)";
+        }
+    }
+    else {
+        $v = " ";
+    }
+
+    # From kernel 5.3 request_key() requires { link } not { search } perm
+    $kvercur = `uname -r`;
+    chomp($kvercur);
+    $kverminstream = "5.3";
+    $test_link_53  = 0;
+
+    $result = `$basedir/../kvercmp $kvercur $kverminstream`;
+    if ( $result > 0 ) {
+        $test_link_53 = 1;
+    }
+
+    plan tests => $test_count;
+}
+
+print "Test key class permissions\n";
+$result = system "runcon -t test_key_t $basedir/keyctl $v";
+ok( $result eq 0 );
+
+$result = system "runcon -t test_no_setkeycreate_t $basedir/keyctl $v 2>&1";
+ok( $result >> 8 eq 3 );
+
+$result = system "runcon -t test_key_no_create_t $basedir/keyctl $v 2>&1";
+ok( $result >> 8 eq 3 );
+
+$result = system "runcon -t test_key_no_write_t $basedir/keyctl $v 2>&1";
+ok( $result >> 8 eq 5 );
+
+$result = system "runcon -t test_key_no_search_t $basedir/keyctl $v 2>&1";
+ok( $result >> 8 eq 6 );
+
+$result = system "runcon -t test_key_no_view_t $basedir/keyctl $v 2>&1";
+ok( $result >> 8 eq 8 );
+
+$result = system "runcon -t test_key_no_read_t $basedir/keyctl $v 2>&1";
+ok( $result >> 8 eq 9 );
+
+$result = system "runcon -t test_key_no_link_t $basedir/keyctl $v 2>&1";
+if ($test_link_53) {
+    ok( $result >> 8 eq 6 );
+}
+else {
+    ok( $result >> 8 eq 10 );
+}
+
+$result = system "runcon -t test_key_no_setattr_t $basedir/keyctl $v 2>&1";
+ok( $result >> 8 eq 11 );
+
+print "Change keyring context\n";
+$result = system
+"runcon -t test_key_t $basedir/keyctl_relabel $v system_u:system_r:test_newcon_key_t:s0";
+ok( $result eq 0 );
+
+print "Test permission checks between a keyring created by another process\n";
+$result = system(
+"runcon -t test_keyring_service_t $basedir/keyring_service $v test_request_keys_t $basedir/request_keys 2>&1"
+);
+ok( $result eq 0 );
+
+$result = system(
+"runcon -t test_keyring_service_t $basedir/keyring_service $v test_request_keys_no_link_t $basedir/request_keys 2>&1"
+);
+ok( $result >> 8 eq 3 );
+
+$result = system(
+"runcon -t test_keyring_service_t $basedir/keyring_service $v test_request_keys_no_write_t $basedir/request_keys 2>&1"
+);
+ok( $result >> 8 eq 5 );
+
+$result = system(
+"runcon -t test_keyring_service_t $basedir/keyring_service $v test_request_keys_no_view_t $basedir/request_keys 2>&1"
+);
+ok( $result >> 8 eq 4 );
+
+$result = system(
+"runcon -t test_keyring_service_t $basedir/keyring_service $v test_request_keys_no_search_t $basedir/request_keys 2>&1"
+);
+ok( $result >> 8 eq 5 );
+
+$result = system(
+"runcon -t test_keyring_service_t $basedir/keyring_service $v test_request_keys_no_setattr_t $basedir/request_keys 2>&1"
+);
+ok( $result >> 8 eq 6 );
+
+$result = system(
+"runcon -t test_keyring_service_t $basedir/keyring_service $v test_request_keys_no_read_t $basedir/request_keys 2>&1"
+);
+ok( $result >> 8 eq 8 );
+
+exit;
-- 
2.21.0


^ permalink raw reply related	[flat|nested] 2+ messages in thread