1 /* 2 * AppArmor security module 3 * 4 * This file contains AppArmor basic permission sets definitions. 5 * 6 * Copyright 2017 Canonical Ltd. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation, version 2 of the 11 * License. 12 */ 13 14 #ifndef __AA_PERM_H 15 #define __AA_PERM_H 16 17 #include <linux/fs.h> 18 #include "label.h" 19 20 #define AA_MAY_EXEC MAY_EXEC 21 #define AA_MAY_WRITE MAY_WRITE 22 #define AA_MAY_READ MAY_READ 23 #define AA_MAY_APPEND MAY_APPEND 24 25 #define AA_MAY_CREATE 0x0010 26 #define AA_MAY_DELETE 0x0020 27 #define AA_MAY_OPEN 0x0040 28 #define AA_MAY_RENAME 0x0080 /* pair */ 29 30 #define AA_MAY_SETATTR 0x0100 /* meta write */ 31 #define AA_MAY_GETATTR 0x0200 /* meta read */ 32 #define AA_MAY_SETCRED 0x0400 /* security cred/attr */ 33 #define AA_MAY_GETCRED 0x0800 34 35 #define AA_MAY_CHMOD 0x1000 /* pair */ 36 #define AA_MAY_CHOWN 0x2000 /* pair */ 37 #define AA_MAY_CHGRP 0x4000 /* pair */ 38 #define AA_MAY_LOCK 0x8000 /* LINK_SUBSET overlaid */ 39 40 #define AA_EXEC_MMAP 0x00010000 41 #define AA_MAY_MPROT 0x00020000 /* extend conditions */ 42 #define AA_MAY_LINK 0x00040000 /* pair */ 43 #define AA_MAY_SNAPSHOT 0x00080000 /* pair */ 44 45 #define AA_MAY_DELEGATE 46 #define AA_CONT_MATCH 0x08000000 47 48 #define AA_MAY_STACK 0x10000000 49 #define AA_MAY_ONEXEC 0x20000000 /* either stack or change_profile */ 50 #define AA_MAY_CHANGE_PROFILE 0x40000000 51 #define AA_MAY_CHANGEHAT 0x80000000 52 53 #define AA_LINK_SUBSET AA_MAY_LOCK /* overlaid */ 54 55 56 #define PERMS_CHRS_MASK (MAY_READ | MAY_WRITE | AA_MAY_CREATE | \ 57 AA_MAY_DELETE | AA_MAY_LINK | AA_MAY_LOCK | \ 58 AA_MAY_EXEC | AA_EXEC_MMAP | AA_MAY_APPEND) 59 60 #define PERMS_NAMES_MASK (PERMS_CHRS_MASK | AA_MAY_OPEN | AA_MAY_RENAME | \ 61 AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_SETCRED | \ 62 AA_MAY_GETCRED | AA_MAY_CHMOD | AA_MAY_CHOWN | \ 63 AA_MAY_CHGRP | AA_MAY_MPROT | AA_MAY_SNAPSHOT | \ 64 AA_MAY_STACK | AA_MAY_ONEXEC | \ 65 AA_MAY_CHANGE_PROFILE | AA_MAY_CHANGEHAT) 66 67 extern const char aa_file_perm_chrs[]; 68 extern const char *aa_file_perm_names[]; 69 70 struct aa_perms { 71 u32 allow; 72 u32 audit; /* set only when allow is set */ 73 74 u32 deny; /* explicit deny, or conflict if allow also set */ 75 u32 quiet; /* set only when ~allow | deny */ 76 u32 kill; /* set only when ~allow | deny */ 77 u32 stop; /* set only when ~allow | deny */ 78 79 u32 complain; /* accumulates only used when ~allow & ~deny */ 80 u32 cond; /* set only when ~allow and ~deny */ 81 82 u32 hide; /* set only when ~allow | deny */ 83 u32 prompt; /* accumulates only used when ~allow & ~deny */ 84 85 /* Reserved: 86 * u32 subtree; / * set only when allow is set * / 87 */ 88 u16 xindex; 89 }; 90 91 #define ALL_PERMS_MASK 0xffffffff 92 extern struct aa_perms nullperms; 93 extern struct aa_perms allperms; 94 95 96 #define xcheck(FN1, FN2) \ 97 ({ \ 98 int e, error = FN1; \ 99 e = FN2; \ 100 if (e) \ 101 error = e; \ 102 error; \ 103 }) 104 105 106 /* 107 * TODO: update for labels pointing to labels instead of profiles 108 * TODO: optimize the walk, currently does subwalk of L2 for each P in L1 109 * gah this doesn't allow for label compound check!!!! 110 */ 111 #define xcheck_ns_profile_profile(P1, P2, FN, args...) \ 112 ({ \ 113 int ____e = 0; \ 114 if (P1->ns == P2->ns) \ 115 ____e = FN((P1), (P2), args); \ 116 (____e); \ 117 }) 118 119 #define xcheck_ns_profile_label(P, L, FN, args...) \ 120 ({ \ 121 struct aa_profile *__p2; \ 122 fn_for_each((L), __p2, \ 123 xcheck_ns_profile_profile((P), __p2, (FN), args)); \ 124 }) 125 126 #define xcheck_ns_labels(L1, L2, FN, args...) \ 127 ({ \ 128 struct aa_profile *__p1; \ 129 fn_for_each((L1), __p1, FN(__p1, (L2), args)); \ 130 }) 131 132 /* Do the cross check but applying FN at the profiles level */ 133 #define xcheck_labels_profiles(L1, L2, FN, args...) \ 134 xcheck_ns_labels((L1), (L2), xcheck_ns_profile_label, (FN), args) 135 136 #define xcheck_labels(L1, L2, P, FN1, FN2) \ 137 xcheck(fn_for_each((L1), (P), (FN1)), fn_for_each((L2), (P), (FN2))) 138 139 140 void aa_perm_mask_to_str(char *str, const char *chrs, u32 mask); 141 void aa_audit_perm_names(struct audit_buffer *ab, const char * const *names, 142 u32 mask); 143 void aa_audit_perm_mask(struct audit_buffer *ab, u32 mask, const char *chrs, 144 u32 chrsmask, const char * const *names, u32 namesmask); 145 void aa_apply_modes_to_perms(struct aa_profile *profile, 146 struct aa_perms *perms); 147 void aa_compute_perms(struct aa_dfa *dfa, unsigned int state, 148 struct aa_perms *perms); 149 void aa_perms_accum(struct aa_perms *accum, struct aa_perms *addend); 150 void aa_perms_accum_raw(struct aa_perms *accum, struct aa_perms *addend); 151 void aa_profile_match_label(struct aa_profile *profile, struct aa_label *label, 152 int type, u32 request, struct aa_perms *perms); 153 int aa_profile_label_perm(struct aa_profile *profile, struct aa_profile *target, 154 u32 request, int type, u32 *deny, 155 struct common_audit_data *sa); 156 int aa_check_perms(struct aa_profile *profile, struct aa_perms *perms, 157 u32 request, struct common_audit_data *sa, 158 void (*cb)(struct audit_buffer *, void *)); 159 #endif /* __AA_PERM_H */ 160