/* * AppArmor security module * * This file contains AppArmor basic permission sets definitions. * * Copyright 2013 Canonical Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation, version 2 of the * License. */ #ifndef __AA_PERM_H #define __AA_PERM_H #include <linux/fs.h> #include "label.h" #define AA_MAY_EXEC MAY_EXEC #define AA_MAY_WRITE MAY_WRITE #define AA_MAY_READ MAY_READ #define AA_MAY_APPEND MAY_APPEND #define AA_MAY_CREATE 0x0010 #define AA_MAY_DELETE 0x0020 #define AA_MAY_OPEN 0x0040 #define AA_MAY_RENAME 0x0080 /* pair */ #define AA_MAY_SETATTR 0x0100 /* meta write */ #define AA_MAY_GETATTR 0x0200 /* meta read */ #define AA_MAY_SETCRED 0x0400 /* security cred/attr */ #define AA_MAY_GETCRED 0x0800 #define AA_MAY_CHMOD 0x1000 /* pair */ #define AA_MAY_CHOWN 0x2000 /* pair */ #define AA_MAY_CHGRP 0x4000 /* pair */ #define AA_MAY_LOCK 0x8000 /* LINK_SUBSET overlaid */ #define AA_EXEC_MMAP 0x00010000 #define AA_MAY_MPROT 0x00020000 /* extend conditions */ #define AA_MAY_LINK 0x00040000 /* pair */ #define AA_MAY_SNAPSHOT 0x00080000 /* pair */ #define AA_MAY_DELEGATE #define AA_CONT_MATCH 0x08000000 #define AA_MAY_STACK 0x10000000 #define AA_MAY_ONEXEC 0x20000000 /* either stack or change_profile */ #define AA_MAY_CHANGE_PROFILE 0x40000000 #define AA_MAY_CHANGEHAT 0x80000000 #define AA_LINK_SUBSET AA_MAY_LOCK /* overlaid */ #define PERMS_CHRS_MASK (MAY_READ | MAY_WRITE | AA_MAY_CREATE | \ AA_MAY_DELETE | AA_MAY_LINK | AA_MAY_LOCK | \ AA_MAY_EXEC | AA_EXEC_MMAP | AA_MAY_APPEND) #define PERMS_NAMES_MASK (PERMS_CHRS_MASK | AA_MAY_OPEN | AA_MAY_RENAME | \ AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_SETCRED | \ AA_MAY_GETCRED | AA_MAY_CHMOD | AA_MAY_CHOWN | \ AA_MAY_CHGRP | AA_MAY_MPROT | AA_MAY_SNAPSHOT | \ AA_MAY_STACK | AA_MAY_ONEXEC | \ AA_MAY_CHANGE_PROFILE | AA_MAY_CHANGEHAT) extern const char aa_file_perm_chrs[]; extern const char *aa_file_perm_names[]; struct aa_perms { u32 allow; u32 audit; /* set only when allow is set */ u32 deny; /* explicit deny, or conflict if allow also set */ u32 quiet; /* set only when ~allow | deny */ u32 kill; /* set only when ~allow | deny */ u32 stop; /* set only when ~allow | deny */ u32 complain; /* accumulates only used when ~allow & ~deny */ u32 cond; /* set only when ~allow and ~deny */ u32 hide; /* set only when ~allow | deny */ u32 prompt; /* accumulates only used when ~allow & ~deny */ /* Reserved: * u32 subtree; / * set only when allow is set * / */ }; #define ALL_PERMS_MASK 0xffffffff #define aa_perms_clear(X) memset((X), 0, sizeof(*(X))); #define aa_perms_all(X) \ do { \ aa_perms_clear(X); \ (X)->allow = ALL_PERMS_MASK; \ /* the following are only used for denials */ \ (X)->quiet = ALL_PERMS_MASK; \ (X)->hide = ALL_PERMS_MASK; \ } while (0) #define xcheck(FN1, FN2) \ ({ \ int e, error = FN1; \ e = FN2; \ if (e) \ error = e; \ error; \ }) /* TODO: update for labels pointing to labels instead of profiles * Note: this only works for profiles from a single namespace */ #define xcheck_profile_label(P, L, FN, args...) \ ({ \ struct aa_profile *__p2; \ fn_for_each((L), __p2, FN((P), __p2, args)); \ }) #define xcheck_ns_labels(L1, L2, FN, args...) \ ({ \ struct aa_profile *__p1; \ fn_for_each((L1), __p1, FN(__p1, (L2), args)); \ }) /* todo: fix to handle multiple namespaces */ #define xcheck_labels(L1, L2, FN, args...) \ xcheck_ns_labels((L1), (L2), FN, args) /* Do the cross check but applying FN at the profiles level */ #define xcheck_labels_profiles(L1, L2, FN, args...) \ xcheck_ns_labels((L1), (L2), xcheck_profile_label, (FN), args) #define FINAL_CHECK true void aa_perm_mask_to_str(char *str, const char *chrs, u32 mask); void aa_audit_perm_names(struct audit_buffer *ab, const char **names, u32 mask); void aa_audit_perm_mask(struct audit_buffer *ab, u32 mask, const char *chrs, u32 chrsmask, const char **names, u32 namesmask); void aa_apply_modes_to_perms(struct aa_profile *profile, struct aa_perms *perms); void aa_compute_perms(struct aa_dfa *dfa, unsigned int state, struct aa_perms *perms); void aa_perms_accum(struct aa_perms *accum, struct aa_perms *addend); void aa_perms_accum_raw(struct aa_perms *accum, struct aa_perms *addend); void aa_profile_match_label(struct aa_profile *profile, const char *label, int type, struct aa_perms *perms); int aa_profile_label_perm(struct aa_profile *profile, struct aa_profile *target, u32 request, int type, u32 *deny, struct common_audit_data *sa); int aa_check_perms(struct aa_profile *profile, struct aa_perms *perms, u32 request, struct common_audit_data *sa, void (*cb) (struct audit_buffer *, void *)); const char *aa_peer_name(struct aa_profile *peer); static inline int aa_xlabel_perm(struct aa_profile *profile, struct aa_profile *target, int type, u32 request, u32 reverse, u32 * deny, struct common_audit_data *sa) { /* TODO: ??? 2nd aa_profile_label_perm needs to reverse perms */ return xcheck(aa_profile_label_perm(profile, target, request, type, deny, sa), aa_profile_label_perm(target, profile, request /*??*/, type, deny, sa)); } #endif /* __AA_PERM_H */