X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ff6e181ae92fc6f1e89841290f461d1f2f9badd9..935ed37a5c468c8a1c07408573c08b8b7ef80e8b:/bsd/sys/kauth.h diff --git a/bsd/sys/kauth.h b/bsd/sys/kauth.h index 33e5e339d..8b41ac018 100644 --- a/bsd/sys/kauth.h +++ b/bsd/sys/kauth.h @@ -1,14 +1,19 @@ /* - * Copyright (c) 2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2004-2007 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in - * compliance with the License. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER @@ -18,7 +23,13 @@ * Please see the License for the specific language governing rights and * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ + */ +/* + * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce + * support for mandatory and extensible security protections. This notice + * is included in support of clause 2.2 (b) of the Apple Public License, + * Version 2.0. */ #ifndef _SYS_KAUTH_H @@ -26,6 +37,7 @@ #include #include +#include #ifdef __APPLE_API_EVOLVING @@ -63,7 +75,11 @@ typedef struct { #define KAUTH_NTSID_SIZE(_s) (KAUTH_NTSID_HDRSIZE + ((_s)->sid_authcount * sizeof(u_int32_t))) /* - * External lookup message payload + * External lookup message payload; this structure is shared between the + * kernel group membership resolver, and the user space group membership + * resolver daemon, and is use to communicate resolution requests from the + * kernel to user space, and the result of that request from user space to + * the kernel. */ struct kauth_identity_extlookup { u_int32_t el_seqno; /* request sequence number */ @@ -177,17 +193,32 @@ extern kauth_cred_t kauth_cred_proc_ref(proc_t procp); extern kauth_cred_t kauth_cred_alloc(void); extern kauth_cred_t kauth_cred_create(kauth_cred_t cred); extern void kauth_cred_ref(kauth_cred_t _cred); -extern void kauth_cred_rele(kauth_cred_t _cred); +/* Use kauth_cred_unref(), not kauth_cred_rele() */ +extern void kauth_cred_rele(kauth_cred_t _cred) __deprecated; extern kauth_cred_t kauth_cred_dup(kauth_cred_t cred); extern kauth_cred_t kauth_cred_copy_real(kauth_cred_t cred); -extern void kauth_cred_unref(kauth_cred_t _cred); -extern kauth_cred_t kauth_cred_setuid(kauth_cred_t cred, uid_t uid); -extern kauth_cred_t kauth_cred_seteuid(kauth_cred_t cred, uid_t euid); -extern kauth_cred_t kauth_cred_setgid(kauth_cred_t cred, gid_t gid); -extern kauth_cred_t kauth_cred_setegid(kauth_cred_t cred, gid_t egid); +extern void kauth_cred_unref(kauth_cred_t *_cred); +extern kauth_cred_t kauth_cred_setresuid(kauth_cred_t cred, uid_t ruid, uid_t euid, uid_t svuid, uid_t gmuid); +extern kauth_cred_t kauth_cred_setresgid(kauth_cred_t cred, gid_t rgid, gid_t egid, gid_t svgid); extern kauth_cred_t kauth_cred_setuidgid(kauth_cred_t cred, uid_t uid, gid_t gid); extern kauth_cred_t kauth_cred_setsvuidgid(kauth_cred_t cred, uid_t uid, gid_t gid); extern kauth_cred_t kauth_cred_setgroups(kauth_cred_t cred, gid_t *groups, int groupcount, uid_t gmuid); +struct uthread; +extern void kauth_cred_uthread_update(struct uthread *, proc_t); +#if CONFIG_MACF +struct label; +extern kauth_cred_t kauth_cred_label_update(kauth_cred_t cred, struct label *label); +extern int kauth_proc_label_update(struct proc *p, struct label *label); +extern int kauth_proc_label_update_execve(struct proc *p, struct vfs_context *ctx, struct vnode *vp, struct label *scriptlabel, struct label *execlabel); +#else +/* this is a temp hack to cover us when MAC is not built in a kernel configuration. + * Since we cannot build our export list based on the kernel configuration we need + * to define a stub. + */ +extern kauth_cred_t kauth_cred_label_update(kauth_cred_t cred, void *label); +extern int kauth_proc_label_update(struct proc *p, void *label); +#endif + extern kauth_cred_t kauth_cred_find(kauth_cred_t cred); extern int kauth_cred_getgroups(gid_t *_groups, int *_groupcount); extern int kauth_cred_assume(uid_t _uid); @@ -207,12 +238,16 @@ extern int kauth_cred_gid2ntsid(gid_t _gid, ntsid_t *_sidp); extern int kauth_cred_guid2ntsid(guid_t *_guid, ntsid_t *_sidp); extern int kauth_cred_ismember_gid(kauth_cred_t _cred, gid_t _gid, int *_resultp); extern int kauth_cred_ismember_guid(kauth_cred_t _cred, guid_t *_guidp, int *_resultp); +extern int kauth_cred_gid_subset(kauth_cred_t _cred1, kauth_cred_t _cred2, int *_resultp); + +struct auditinfo; +extern kauth_cred_t kauth_cred_setauditinfo(kauth_cred_t, struct auditinfo *); extern int kauth_cred_supplementary_register(const char *name, int *ident); extern int kauth_cred_supplementary_add(kauth_cred_t cred, int ident, const void *data, size_t datasize); extern int kauth_cred_supplementary_remove(kauth_cred_t cred, int ident); -/* NOT KPI - fast path for in-kernel code only */ +/* currently only exported in unsupported for use by seatbelt */ extern int kauth_cred_issuser(kauth_cred_t _cred); @@ -257,6 +292,12 @@ struct kauth_ace { #define KAUTH_ACE_ONLY_INHERIT (1<<8) #define KAUTH_ACE_SUCCESS (1<<9) /* not implemented (AUDIT/ALARM) */ #define KAUTH_ACE_FAILURE (1<<10) /* not implemented (AUDIT/ALARM) */ +/* All flag bits controlling ACE inheritance */ +#define KAUTH_ACE_INHERIT_CONTROL_FLAGS \ + (KAUTH_ACE_FILE_INHERIT | \ + KAUTH_ACE_DIRECTORY_INHERIT | \ + KAUTH_ACE_LIMIT_INHERIT | \ + KAUTH_ACE_ONLY_INHERIT) kauth_ace_rights_t ace_rights; /* scope specific */ /* These rights are never tested, but may be present in an ACL */ #define KAUTH_ACE_GENERIC_ALL (1<<21) @@ -302,7 +343,17 @@ struct kauth_acl { /* this ACL must not be overwritten as part of an inheritance operation */ #define KAUTH_ACL_NO_INHERIT (1<<17) -#define KAUTH_ACL_SIZE(c) (sizeof(struct kauth_acl) + (c) * sizeof(struct kauth_ace)) +/* acl_entrycount that tells us the ACL is not valid */ +#define KAUTH_FILESEC_NOACL ((u_int32_t)(-1)) + +/* + * If the acl_entrycount field is KAUTH_FILESEC_NOACL, then the size is the + * same as a kauth_acl structure; the intent is to put an actual entrycount of + * KAUTH_FILESEC_NOACL on disk to distinguish a kauth_filesec_t with an empty + * entry (Windows treats this as "deny all") from one that merely indicates a + * file group and/or owner guid values. + */ +#define KAUTH_ACL_SIZE(c) (sizeof(struct kauth_acl) + ((u_int32_t)(c) != KAUTH_FILESEC_NOACL ? ((c) * sizeof(struct kauth_ace)) : 0)) #define KAUTH_ACL_COPYSIZE(p) KAUTH_ACL_SIZE((p)->acl_entrycount) @@ -331,8 +382,6 @@ struct kauth_filesec { guid_t fsec_group; struct kauth_acl fsec_acl; - /* acl_entrycount that tells us the ACL is not valid */ -#define KAUTH_FILESEC_NOACL ((u_int32_t)(-1)) }; /* backwards compatibility */ @@ -353,19 +402,27 @@ typedef struct kauth_filesec *kauth_filesec_t; #define KAUTH_FILESEC_SIZE(c) (sizeof(struct kauth_filesec) + (c) * sizeof(struct kauth_ace)) #define KAUTH_FILESEC_COPYSIZE(p) KAUTH_FILESEC_SIZE(((p)->fsec_entrycount == KAUTH_FILESEC_NOACL) ? 0 : (p)->fsec_entrycount) #define KAUTH_FILESEC_COUNT(s) ((s - sizeof(struct kauth_filesec)) / sizeof(struct kauth_ace)) +#define KAUTH_FILESEC_VALID(s) ((s) >= sizeof(struct kauth_filesec) && (((s) - sizeof(struct kauth_filesec)) % sizeof(struct kauth_ace)) == 0) #define KAUTH_FILESEC_XATTR "com.apple.system.Security" +/* Allowable first arguments to kauth_filesec_acl_setendian() */ +#define KAUTH_ENDIAN_HOST 0x00000001 /* set host endianness */ +#define KAUTH_ENDIAN_DISK 0x00000002 /* set disk endianness */ + +#endif /* KERNEL || */ + + +#ifdef KERNEL + +/* KPI */ __BEGIN_DECLS kauth_filesec_t kauth_filesec_alloc(int size); void kauth_filesec_free(kauth_filesec_t fsp); int kauth_copyinfilesec(user_addr_t xsecurity, kauth_filesec_t *xsecdestpp); + void kauth_filesec_acl_setendian(int, kauth_filesec_t, kauth_acl_t); __END_DECLS -#endif /* KERNEL || */ - - -#ifdef KERNEL /* * Scope management. */ @@ -396,6 +453,7 @@ struct kauth_acl_eval { kauth_ace_rights_t ae_requested; kauth_ace_rights_t ae_residual; int ae_result; + boolean_t ae_found_deny; int ae_options; #define KAUTH_AEVAL_IS_OWNER (1<<0) /* authorizing operation for owner */ #define KAUTH_AEVAL_IN_GROUP (1<<1) /* authorizing operation for groupmember */ @@ -466,9 +524,10 @@ __END_DECLS #define KAUTH_FILEOP_OPEN 1 #define KAUTH_FILEOP_CLOSE 2 #define KAUTH_FILEOP_RENAME 3 -#define KAUTH_FILEOP_EXCHANGE 4 +#define KAUTH_FILEOP_EXCHANGE 4 #define KAUTH_FILEOP_LINK 5 #define KAUTH_FILEOP_EXEC 6 +#define KAUTH_FILEOP_DELETE 7 /* * arguments passed to KAUTH_FILEOP_OPEN listeners @@ -490,6 +549,9 @@ __END_DECLS * arguments passed to KAUTH_FILEOP_EXEC listeners * arg0 is pointer to vnode (vnode *) for executable. * arg1 is pointer to path (char *) to executable. + * arguments passed to KAUTH_FILEOP_DELETE listeners + * arg0 is pointer to vnode (vnode *) of file/dir that was deleted. + * arg1 is pointer to path (char *) of file/dir that was deleted. */ /* Flag values returned to close listeners. */ @@ -565,6 +627,27 @@ __END_DECLS */ #define KAUTH_VNODE_NOIMMUTABLE (1<<30) + +/* + * fake right that is composed by the following... + * vnode must have search for owner, group and world allowed + * plus there must be no deny modes present for SEARCH... this fake + * right is used by the fast lookup path to avoid checking + * for an exact match on the last credential to lookup + * the component being acted on + */ +#define KAUTH_VNODE_SEARCHBYANYONE (1<<29) + + +/* + * when passed as an 'action' to "vnode_uncache_authorized_actions" + * it indicates that all of the cached authorizations for that + * vnode should be invalidated + */ +#define KAUTH_INVALIDATE_CACHED_RIGHTS ((kauth_action_t)~0) + + + /* The expansions of the GENERIC bits at evaluation time */ #define KAUTH_VNODE_GENERIC_READ_BITS (KAUTH_VNODE_READ_DATA | \ KAUTH_VNODE_READ_ATTRIBUTES | \ @@ -616,7 +699,7 @@ __END_DECLS # ifndef _FN_KPRINTF # define _FN_KPRINTF void kprintf(const char *fmt, ...); -# endif +# endif /* !_FN_KPRINTF */ # define KAUTH_DEBUG_ENABLE # define K_UUID_FMT "%08x:%08x:%08x:%08x" # define K_UUID_ARG(_u) *(int *)&_u.g_guid[0],*(int *)&_u.g_guid[4],*(int *)&_u.g_guid[8],*(int *)&_u.g_guid[12] @@ -630,24 +713,23 @@ void kprintf(const char *fmt, ...); __PRETTY_FUNCTION__, __LINE__ , \ ##args); \ } while(0) -#else +#else /* !0 */ # define KAUTH_DEBUG(fmt, args...) do { } while (0) # define VFS_DEBUG(ctx, vp, fmt, args...) do { } while(0) -#endif +#endif /* !0 */ /* * Initialisation. */ extern lck_grp_t *kauth_lck_grp; __BEGIN_DECLS -extern void kauth_init(void); -extern void kauth_identity_init(void); -extern void kauth_groups_init(void); -extern void kauth_cred_init(void); -extern void kauth_resolver_init(void); +extern void kauth_init(void) __attribute__((section("__TEXT, initcode"))); +extern void kauth_identity_init(void) __attribute__((section("__TEXT, initcode"))); +extern void kauth_groups_init(void) __attribute__((section("__TEXT, initcode"))); +extern void kauth_cred_init(void) __attribute__((section("__TEXT, initcode"))); +extern void kauth_resolver_init(void) __attribute__((section("__TEXT, initcode"))); __END_DECLS -#endif +#endif /* KERNEL */ #endif /* __APPLE_API_EVOLVING */ #endif /* _SYS_KAUTH_H */ -