mirror of
https://github.com/SELinuxProject/selinux
synced 2024-12-13 09:34:54 +00:00
25ce102907
It seems validatetrans support was never added to libselinux, despite being added to selinuxfs in kernel version 4.5 There is a utility to test, however the targeted policy has no validatetrans rules so some must be added: $ cat validatetrans.cil (mlsvalidatetrans db_table (and (or (or (or (eq l1 l2) (and (eq t3 unconfined_t) (domby l1 l2))) (and (eq t3 unconfined_t) (dom l1 l2))) (and (eq t3 unconfined_t) (incomp l1 l2))) (or (or (or (eq l1 h2) (and (eq t3 unconfined_t) (domby h1 h2))) (and (eq t3 unconfined_t) (dom h1 h2))) (and (eq t3 unconfined_t) (incomp h1 h2))))) $ sudo semodule -i validatetrans.cil $ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r: # invalid context here opening /sys/fs/selinux/validatetrans security_validatetrans returned -1 errno: Invalid argument $ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r:init_t:s0 opening /sys/fs/selinux/validatetrans security_validatetrans returned -1 errno: Operation not permitted $ ./validatetrans system_u:system_r:kernel_t:s0 system_u:system_r:init_t:s0:c0 db_table system_u:system_r:unconfined_t:s0 opening /sys/fs/selinux/validatetrans security_validatetrans returned 0 errno: Success Signed-off-by: Joshua Brindle <joshua.brindle@crunchydata.com>
31 lines
643 B
C
31 lines
643 B
C
#include <unistd.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <selinux/selinux.h>
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int main(int argc, char **argv)
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{
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security_class_t tclass;
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int ret;
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if (argc != 5) {
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fprintf(stderr, "usage: %s scontext tcontext tclass newcontext\n",
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argv[0]);
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exit(1);
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}
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tclass = string_to_security_class(argv[3]);
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if (!tclass) {
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fprintf(stderr, "%s: invalid class '%s'\n", argv[0], argv[3]);
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exit(2);
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}
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ret = security_validatetrans(argv[1], argv[2], tclass, argv[4]);
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printf("security_validatetrans returned %d errno: %s\n", ret, strerror(errno));
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return ret;
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}
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