Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 1 | /* |
| 2 | * User-supplied callbacks and default implementations. |
| 3 | * Class and permission mappings. |
| 4 | */ |
| 5 | |
| 6 | #include <stdio.h> |
| 7 | #include <stdlib.h> |
| 8 | #include <stdarg.h> |
| 9 | #include <errno.h> |
| 10 | #include <selinux/selinux.h> |
| 11 | #include "callbacks.h" |
| 12 | |
| 13 | /* default implementations */ |
| 14 | static int __attribute__ ((format(printf, 2, 3))) |
| 15 | default_selinux_log(int type __attribute__((unused)), const char *fmt, ...) |
| 16 | { |
| 17 | int rc; |
| 18 | va_list ap; |
Eric Paris | ac5f564 | 2012-06-12 11:01:11 -0400 | [diff] [blame] | 19 | if (is_selinux_enabled() == 0) return 0; |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 20 | va_start(ap, fmt); |
| 21 | rc = vfprintf(stderr, fmt, ap); |
| 22 | va_end(ap); |
| 23 | return rc; |
| 24 | } |
| 25 | |
| 26 | static int |
| 27 | default_selinux_audit(void *ptr __attribute__((unused)), |
| 28 | security_class_t cls __attribute__((unused)), |
| 29 | char *buf __attribute__((unused)), |
| 30 | size_t len __attribute__((unused))) |
| 31 | { |
| 32 | return 0; |
| 33 | } |
| 34 | |
| 35 | static int |
Stephen Smalley | 9eb9c93 | 2014-02-19 09:16:17 -0500 | [diff] [blame] | 36 | default_selinux_validate(char **ctx) |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 37 | { |
| 38 | return security_check_context(*ctx); |
| 39 | } |
| 40 | |
KaiGai Kohei | 318748d | 2009-04-07 21:47:52 -0400 | [diff] [blame] | 41 | static int |
| 42 | default_selinux_setenforce(int enforcing __attribute__((unused))) |
| 43 | { |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | static int |
| 48 | default_selinux_policyload(int seqno __attribute__((unused))) |
| 49 | { |
| 50 | return 0; |
| 51 | } |
| 52 | |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 53 | /* callback pointers */ |
| 54 | int __attribute__ ((format(printf, 2, 3))) |
| 55 | (*selinux_log)(int, const char *, ...) = |
| 56 | default_selinux_log; |
| 57 | |
| 58 | int |
| 59 | (*selinux_audit) (void *, security_class_t, char *, size_t) = |
| 60 | default_selinux_audit; |
| 61 | |
| 62 | int |
Stephen Smalley | 9eb9c93 | 2014-02-19 09:16:17 -0500 | [diff] [blame] | 63 | (*selinux_validate)(char **ctx) = |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 64 | default_selinux_validate; |
| 65 | |
KaiGai Kohei | 318748d | 2009-04-07 21:47:52 -0400 | [diff] [blame] | 66 | int |
| 67 | (*selinux_netlink_setenforce) (int enforcing) = |
| 68 | default_selinux_setenforce; |
| 69 | |
| 70 | int |
| 71 | (*selinux_netlink_policyload) (int seqno) = |
| 72 | default_selinux_policyload; |
| 73 | |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 74 | /* callback setting function */ |
| 75 | void |
| 76 | selinux_set_callback(int type, union selinux_callback cb) |
| 77 | { |
| 78 | switch (type) { |
| 79 | case SELINUX_CB_LOG: |
| 80 | selinux_log = cb.func_log; |
| 81 | break; |
| 82 | case SELINUX_CB_AUDIT: |
| 83 | selinux_audit = cb.func_audit; |
| 84 | break; |
| 85 | case SELINUX_CB_VALIDATE: |
| 86 | selinux_validate = cb.func_validate; |
| 87 | break; |
KaiGai Kohei | 318748d | 2009-04-07 21:47:52 -0400 | [diff] [blame] | 88 | case SELINUX_CB_SETENFORCE: |
| 89 | selinux_netlink_setenforce = cb.func_setenforce; |
| 90 | break; |
| 91 | case SELINUX_CB_POLICYLOAD: |
| 92 | selinux_netlink_policyload = cb.func_policyload; |
| 93 | break; |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 94 | } |
| 95 | } |
| 96 | |
| 97 | /* callback getting function */ |
| 98 | union selinux_callback |
| 99 | selinux_get_callback(int type) |
| 100 | { |
| 101 | union selinux_callback cb; |
| 102 | |
| 103 | switch (type) { |
| 104 | case SELINUX_CB_LOG: |
| 105 | cb.func_log = selinux_log; |
| 106 | break; |
| 107 | case SELINUX_CB_AUDIT: |
| 108 | cb.func_audit = selinux_audit; |
| 109 | break; |
| 110 | case SELINUX_CB_VALIDATE: |
| 111 | cb.func_validate = selinux_validate; |
| 112 | break; |
KaiGai Kohei | 318748d | 2009-04-07 21:47:52 -0400 | [diff] [blame] | 113 | case SELINUX_CB_SETENFORCE: |
| 114 | cb.func_setenforce = selinux_netlink_setenforce; |
| 115 | break; |
| 116 | case SELINUX_CB_POLICYLOAD: |
| 117 | cb.func_policyload = selinux_netlink_policyload; |
| 118 | break; |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 119 | default: |
| 120 | memset(&cb, 0, sizeof(cb)); |
| 121 | errno = EINVAL; |
| 122 | break; |
| 123 | } |
| 124 | return cb; |
| 125 | } |