diff options
Diffstat (limited to 'usr/src/lib/libsec/common/aclutils.c')
| -rw-r--r-- | usr/src/lib/libsec/common/aclutils.c | 1388 |
1 files changed, 1 insertions, 1387 deletions
diff --git a/usr/src/lib/libsec/common/aclutils.c b/usr/src/lib/libsec/common/aclutils.c index d90ad4b171..0200db6c66 100644 --- a/usr/src/lib/libsec/common/aclutils.c +++ b/usr/src/lib/libsec/common/aclutils.c @@ -33,171 +33,23 @@ #include <pwd.h> #include <strings.h> #include <sys/types.h> -#include <sys/acl.h> #include <errno.h> #include <sys/stat.h> #include <sys/varargs.h> #include <locale.h> #include <aclutils.h> -#include <acl_common.h> #include <sys/avl.h> - -#define offsetof(s, m) ((size_t)(&(((s *)0)->m))) +#include <acl_common.h> #define ACL_PATH 0 #define ACL_FD 1 -#define ACE_POSIX_SUPPORTED_BITS (ACE_READ_DATA | \ - ACE_WRITE_DATA | ACE_APPEND_DATA | ACE_EXECUTE | \ - ACE_READ_ATTRIBUTES | ACE_READ_ACL | ACE_WRITE_ACL) - - -#define ACL_SYNCHRONIZE_SET_DENY 0x0000001 -#define ACL_SYNCHRONIZE_SET_ALLOW 0x0000002 -#define ACL_SYNCHRONIZE_ERR_DENY 0x0000004 -#define ACL_SYNCHRONIZE_ERR_ALLOW 0x0000008 - -#define ACL_WRITE_OWNER_SET_DENY 0x0000010 -#define ACL_WRITE_OWNER_SET_ALLOW 0x0000020 -#define ACL_WRITE_OWNER_ERR_DENY 0x0000040 -#define ACL_WRITE_OWNER_ERR_ALLOW 0x0000080 - -#define ACL_DELETE_SET_DENY 0x0000100 -#define ACL_DELETE_SET_ALLOW 0x0000200 -#define ACL_DELETE_ERR_DENY 0x0000400 -#define ACL_DELETE_ERR_ALLOW 0x0000800 - -#define ACL_WRITE_ATTRS_OWNER_SET_DENY 0x0001000 -#define ACL_WRITE_ATTRS_OWNER_SET_ALLOW 0x0002000 -#define ACL_WRITE_ATTRS_OWNER_ERR_DENY 0x0004000 -#define ACL_WRITE_ATTRS_OWNER_ERR_ALLOW 0x0008000 - -#define ACL_WRITE_ATTRS_WRITER_SET_DENY 0x0010000 -#define ACL_WRITE_ATTRS_WRITER_SET_ALLOW 0x0020000 -#define ACL_WRITE_ATTRS_WRITER_ERR_DENY 0x0040000 -#define ACL_WRITE_ATTRS_WRITER_ERR_ALLOW 0x0080000 - -#define ACL_WRITE_NAMED_WRITER_SET_DENY 0x0100000 -#define ACL_WRITE_NAMED_WRITER_SET_ALLOW 0x0200000 -#define ACL_WRITE_NAMED_WRITER_ERR_DENY 0x0400000 -#define ACL_WRITE_NAMED_WRITER_ERR_ALLOW 0x0800000 - -#define ACL_READ_NAMED_READER_SET_DENY 0x1000000 -#define ACL_READ_NAMED_READER_SET_ALLOW 0x2000000 -#define ACL_READ_NAMED_READER_ERR_DENY 0x4000000 -#define ACL_READ_NAMED_READER_ERR_ALLOW 0x8000000 - - -#define ACE_VALID_MASK_BITS (\ - ACE_READ_DATA | \ - ACE_LIST_DIRECTORY | \ - ACE_WRITE_DATA | \ - ACE_ADD_FILE | \ - ACE_APPEND_DATA | \ - ACE_ADD_SUBDIRECTORY | \ - ACE_READ_NAMED_ATTRS | \ - ACE_WRITE_NAMED_ATTRS | \ - ACE_EXECUTE | \ - ACE_DELETE_CHILD | \ - ACE_READ_ATTRIBUTES | \ - ACE_WRITE_ATTRIBUTES | \ - ACE_DELETE | \ - ACE_READ_ACL | \ - ACE_WRITE_ACL | \ - ACE_WRITE_OWNER | \ - ACE_SYNCHRONIZE) - -#define ACE_MASK_UNDEFINED 0x80000000 - -#define ACE_VALID_FLAG_BITS (ACE_FILE_INHERIT_ACE | \ - ACE_DIRECTORY_INHERIT_ACE | \ - ACE_NO_PROPAGATE_INHERIT_ACE | ACE_INHERIT_ONLY_ACE | \ - ACE_SUCCESSFUL_ACCESS_ACE_FLAG | ACE_FAILED_ACCESS_ACE_FLAG | \ - ACE_IDENTIFIER_GROUP | ACE_OWNER | ACE_GROUP | ACE_EVERYONE) - -/* - * ACL conversion helpers - */ - -typedef enum { - ace_unused, - ace_user_obj, - ace_user, - ace_group, /* includes GROUP and GROUP_OBJ */ - ace_other_obj -} ace_to_aent_state_t; - -typedef struct acevals { - uid_t key; - avl_node_t avl; - uint32_t mask; - uint32_t allowed; - uint32_t denied; - int aent_type; -} acevals_t; - -typedef struct ace_list { - acevals_t user_obj; - avl_tree_t user; - int numusers; - acevals_t group_obj; - avl_tree_t group; - int numgroups; - acevals_t other_obj; - uint32_t acl_mask; - int hasmask; - int dfacl_flag; - ace_to_aent_state_t state; - int seen; /* bitmask of all aclent_t a_type values seen */ -} ace_list_t; typedef union { const char *file; int fd; } acl_inp; -acl_t * -acl_alloc(enum acl_type type) -{ - acl_t *aclp; - - aclp = malloc(sizeof (acl_t)); - - if (aclp == NULL) - return (NULL); - - aclp->acl_aclp = NULL; - aclp->acl_cnt = 0; - - switch (type) { - case ACE_T: - aclp->acl_type = ACE_T; - aclp->acl_entry_size = sizeof (ace_t); - break; - case ACLENT_T: - aclp->acl_type = ACLENT_T; - aclp->acl_entry_size = sizeof (aclent_t); - break; - default: - acl_free(aclp); - aclp = NULL; - } - return (aclp); -} - -/* - * Free acl_t structure - */ -void -acl_free(acl_t *aclp) -{ - if (aclp == NULL) - return; - - if (aclp->acl_aclp) - free(aclp->acl_aclp); - free(aclp); -} /* * Determine whether a file has a trivial ACL @@ -242,1194 +94,6 @@ acl_trivial(const char *filename) return (val); } -static uint32_t -access_mask_set(int haswriteperm, int hasreadperm, int isowner, int isallow) -{ - uint32_t access_mask = 0; - int acl_produce; - int synchronize_set = 0, write_owner_set = 0; - int delete_set = 0, write_attrs_set = 0; - int read_named_set = 0, write_named_set = 0; - - acl_produce = (ACL_SYNCHRONIZE_SET_ALLOW | - ACL_WRITE_ATTRS_OWNER_SET_ALLOW | - ACL_WRITE_ATTRS_WRITER_SET_DENY); - - if (isallow) { - synchronize_set = ACL_SYNCHRONIZE_SET_ALLOW; - write_owner_set = ACL_WRITE_OWNER_SET_ALLOW; - delete_set = ACL_DELETE_SET_ALLOW; - if (hasreadperm) - read_named_set = ACL_READ_NAMED_READER_SET_ALLOW; - if (haswriteperm) - write_named_set = ACL_WRITE_NAMED_WRITER_SET_ALLOW; - if (isowner) - write_attrs_set = ACL_WRITE_ATTRS_OWNER_SET_ALLOW; - else if (haswriteperm) - write_attrs_set = ACL_WRITE_ATTRS_WRITER_SET_ALLOW; - } else { - - synchronize_set = ACL_SYNCHRONIZE_SET_DENY; - write_owner_set = ACL_WRITE_OWNER_SET_DENY; - delete_set = ACL_DELETE_SET_DENY; - if (hasreadperm) - read_named_set = ACL_READ_NAMED_READER_SET_DENY; - if (haswriteperm) - write_named_set = ACL_WRITE_NAMED_WRITER_SET_DENY; - if (isowner) - write_attrs_set = ACL_WRITE_ATTRS_OWNER_SET_DENY; - else if (haswriteperm) - write_attrs_set = ACL_WRITE_ATTRS_WRITER_SET_DENY; - else - /* - * If the entity is not the owner and does not - * have write permissions ACE_WRITE_ATTRIBUTES will - * always go in the DENY ACE. - */ - access_mask |= ACE_WRITE_ATTRIBUTES; - } - - if (acl_produce & synchronize_set) - access_mask |= ACE_SYNCHRONIZE; - if (acl_produce & write_owner_set) - access_mask |= ACE_WRITE_OWNER; - if (acl_produce & delete_set) - access_mask |= ACE_DELETE; - if (acl_produce & write_attrs_set) - access_mask |= ACE_WRITE_ATTRIBUTES; - if (acl_produce & read_named_set) - access_mask |= ACE_READ_NAMED_ATTRS; - if (acl_produce & write_named_set) - access_mask |= ACE_WRITE_NAMED_ATTRS; - - return (access_mask); -} - -/* - * Given an mode_t, convert it into an access_mask as used - * by nfsace, assuming aclent_t -> nfsace semantics. - */ -static uint32_t -mode_to_ace_access(mode_t mode, int isdir, int isowner, int isallow) -{ - uint32_t access = 0; - int haswriteperm = 0; - int hasreadperm = 0; - - if (isallow) { - haswriteperm = (mode & 02); - hasreadperm = (mode & 04); - } else { - haswriteperm = !(mode & 02); - hasreadperm = !(mode & 04); - } - - /* - * The following call takes care of correctly setting the following - * mask bits in the access_mask: - * ACE_SYNCHRONIZE, ACE_WRITE_OWNER, ACE_DELETE, - * ACE_WRITE_ATTRIBUTES, ACE_WRITE_NAMED_ATTRS, ACE_READ_NAMED_ATTRS - */ - access = access_mask_set(haswriteperm, hasreadperm, isowner, isallow); - - if (isallow) { - access |= ACE_READ_ACL | ACE_READ_ATTRIBUTES; - if (isowner) - access |= ACE_WRITE_ACL; - } else { - if (! isowner) - access |= ACE_WRITE_ACL; - } - - /* read */ - if (mode & 04) { - access |= ACE_READ_DATA; - } - /* write */ - if (mode & 02) { - access |= ACE_WRITE_DATA | - ACE_APPEND_DATA; - if (isdir) - access |= ACE_DELETE_CHILD; - } - /* exec */ - if (mode & 01) { - access |= ACE_EXECUTE; - } - - return (access); -} - -/* - * Given an nfsace (presumably an ALLOW entry), make a - * corresponding DENY entry at the address given. - */ -static void -ace_make_deny(ace_t *allow, ace_t *deny, int isdir, int isowner) -{ - (void) memcpy(deny, allow, sizeof (ace_t)); - - deny->a_who = allow->a_who; - - deny->a_type = ACE_ACCESS_DENIED_ACE_TYPE; - deny->a_access_mask ^= ACE_POSIX_SUPPORTED_BITS; - if (isdir) - deny->a_access_mask ^= ACE_DELETE_CHILD; - - deny->a_access_mask &= ~(ACE_SYNCHRONIZE | ACE_WRITE_OWNER | - ACE_DELETE | ACE_WRITE_ATTRIBUTES | ACE_READ_NAMED_ATTRS | - ACE_WRITE_NAMED_ATTRS); - deny->a_access_mask |= access_mask_set((allow->a_access_mask & - ACE_WRITE_DATA), (allow->a_access_mask & ACE_READ_DATA), isowner, - B_FALSE); -} -/* - * Make an initial pass over an array of aclent_t's. Gather - * information such as an ACL_MASK (if any), number of users, - * number of groups, and whether the array needs to be sorted. - */ -static int -ln_aent_preprocess(aclent_t *aclent, int n, - int *hasmask, mode_t *mask, - int *numuser, int *numgroup, int *needsort) -{ - int error = 0; - int i; - int curtype = 0; - - *hasmask = 0; - *mask = 07; - *needsort = 0; - *numuser = 0; - *numgroup = 0; - - for (i = 0; i < n; i++) { - if (aclent[i].a_type < curtype) - *needsort = 1; - else if (aclent[i].a_type > curtype) - curtype = aclent[i].a_type; - if (aclent[i].a_type & USER) - (*numuser)++; - if (aclent[i].a_type & (GROUP | GROUP_OBJ)) - (*numgroup)++; - if (aclent[i].a_type & CLASS_OBJ) { - if (*hasmask) { - error = EINVAL; - goto out; - } else { - *hasmask = 1; - *mask = aclent[i].a_perm; - } - } - } - - if ((! *hasmask) && (*numuser + *numgroup > 1)) { - error = EINVAL; - goto out; - } - -out: - return (error); -} - -/* - * Convert an array of aclent_t into an array of nfsace entries, - * following POSIX draft -> nfsv4 conversion semantics as outlined in - * the IETF draft. - */ -static int -ln_aent_to_ace(aclent_t *aclent, int n, ace_t **acepp, int *rescount, int isdir) -{ - int error = 0; - mode_t mask; - int numuser, numgroup, needsort; - int resultsize = 0; - int i, groupi = 0, skip; - ace_t *acep, *result = NULL; - int hasmask; - - error = ln_aent_preprocess(aclent, n, &hasmask, &mask, - &numuser, &numgroup, &needsort); - if (error != 0) - goto out; - - /* allow + deny for each aclent */ - resultsize = n * 2; - if (hasmask) { - /* - * stick extra deny on the group_obj and on each - * user|group for the mask (the group_obj was added - * into the count for numgroup) - */ - resultsize += numuser + numgroup; - /* ... and don't count the mask itself */ - resultsize -= 2; - } - - /* sort the source if necessary */ - if (needsort) - ksort((caddr_t)aclent, n, sizeof (aclent_t), cmp2acls); - - result = acep = calloc(1, resultsize * sizeof (ace_t)); - if (result == NULL) - goto out; - - for (i = 0; i < n; i++) { - /* - * don't process CLASS_OBJ (mask); mask was grabbed in - * ln_aent_preprocess() - */ - if (aclent[i].a_type & CLASS_OBJ) - continue; - - /* If we need an ACL_MASK emulator, prepend it now */ - if ((hasmask) && - (aclent[i].a_type & (USER | GROUP | GROUP_OBJ))) { - acep->a_type = ACE_ACCESS_DENIED_ACE_TYPE; - acep->a_flags = 0; - if (aclent[i].a_type & GROUP_OBJ) { - acep->a_who = (uid_t)-1; - acep->a_flags |= - (ACE_IDENTIFIER_GROUP|ACE_GROUP); - } else if (aclent[i].a_type & USER) { - acep->a_who = aclent[i].a_id; - } else { - acep->a_who = aclent[i].a_id; - acep->a_flags |= ACE_IDENTIFIER_GROUP; - } - if (aclent[i].a_type & ACL_DEFAULT) { - acep->a_flags |= ACE_INHERIT_ONLY_ACE | - ACE_FILE_INHERIT_ACE | - ACE_DIRECTORY_INHERIT_ACE; - } - /* - * Set the access mask for the prepended deny - * ace. To do this, we invert the mask (found - * in ln_aent_preprocess()) then convert it to an - * DENY ace access_mask. - */ - acep->a_access_mask = mode_to_ace_access((mask ^ 07), - isdir, 0, 0); - acep += 1; - } - - /* handle a_perm -> access_mask */ - acep->a_access_mask = mode_to_ace_access(aclent[i].a_perm, - isdir, aclent[i].a_type & USER_OBJ, 1); - - /* emulate a default aclent */ - if (aclent[i].a_type & ACL_DEFAULT) { - acep->a_flags |= ACE_INHERIT_ONLY_ACE | - ACE_FILE_INHERIT_ACE | - ACE_DIRECTORY_INHERIT_ACE; - } - - /* - * handle a_perm and a_id - * - * this must be done last, since it involves the - * corresponding deny aces, which are handled - * differently for each different a_type. - */ - if (aclent[i].a_type & USER_OBJ) { - acep->a_who = (uid_t)-1; - acep->a_flags |= ACE_OWNER; - ace_make_deny(acep, acep + 1, isdir, B_TRUE); - acep += 2; - } else if (aclent[i].a_type & USER) { - acep->a_who = aclent[i].a_id; - ace_make_deny(acep, acep + 1, isdir, B_FALSE); - acep += 2; - } else if (aclent[i].a_type & (GROUP_OBJ | GROUP)) { - if (aclent[i].a_type & GROUP_OBJ) { - acep->a_who = (uid_t)-1; - acep->a_flags |= ACE_GROUP; - } else { - acep->a_who = aclent[i].a_id; - } - acep->a_flags |= ACE_IDENTIFIER_GROUP; - /* - * Set the corresponding deny for the group ace. - * - * The deny aces go after all of the groups, unlike - * everything else, where they immediately follow - * the allow ace. - * - * We calculate "skip", the number of slots to - * skip ahead for the deny ace, here. - * - * The pattern is: - * MD1 A1 MD2 A2 MD3 A3 D1 D2 D3 - * thus, skip is - * (2 * numgroup) - 1 - groupi - * (2 * numgroup) to account for MD + A - * - 1 to account for the fact that we're on the - * access (A), not the mask (MD) - * - groupi to account for the fact that we have - * passed up groupi number of MD's. - */ - skip = (2 * numgroup) - 1 - groupi; - ace_make_deny(acep, acep + skip, isdir, B_FALSE); - /* - * If we just did the last group, skip acep past - * all of the denies; else, just move ahead one. - */ - if (++groupi >= numgroup) - acep += numgroup + 1; - else - acep += 1; - } else if (aclent[i].a_type & OTHER_OBJ) { - acep->a_who = (uid_t)-1; - acep->a_flags |= ACE_EVERYONE; - ace_make_deny(acep, acep + 1, isdir, B_FALSE); - acep += 2; - } else { - error = EINVAL; - goto out; - } - } - - *acepp = result; - *rescount = resultsize; - -out: - if (error != 0) { - if ((result != NULL) && (resultsize > 0)) { - free(result); - } - } - - return (error); -} - -static int -convert_aent_to_ace(aclent_t *aclentp, int aclcnt, int isdir, - ace_t **retacep, int *retacecnt) -{ - ace_t *acep; - ace_t *dfacep; - int acecnt = 0; - int dfacecnt = 0; - int dfaclstart = 0; - int dfaclcnt = 0; - aclent_t *aclp; - int i; - int error; - - ksort((caddr_t)aclentp, aclcnt, sizeof (aclent_t), cmp2acls); - - for (i = 0, aclp = aclentp; i < aclcnt; aclp++, i++) { - if (aclp->a_type & ACL_DEFAULT) - break; - } - - if (i < aclcnt) { - dfaclstart = i; - dfaclcnt = aclcnt - i; - } - - if (dfaclcnt && isdir == 0) { - return (-1); - } - - error = ln_aent_to_ace(aclentp, i, &acep, &acecnt, isdir); - if (error) - return (-1); - - if (dfaclcnt) { - error = ln_aent_to_ace(&aclentp[dfaclstart], dfaclcnt, - &dfacep, &dfacecnt, isdir); - if (error) { - if (acep) { - free(acep); - } - return (-1); - } - } - - if (dfacecnt != 0) { - acep = realloc(acep, sizeof (ace_t) * (acecnt + dfacecnt)); - if (acep == NULL) - return (-1); - if (dfaclcnt) { - (void) memcpy(acep + acecnt, dfacep, - sizeof (ace_t) * dfacecnt); - } - } - if (dfaclcnt) - free(dfacep); - - *retacecnt = acecnt + dfacecnt; - *retacep = acep; - return (0); -} - -static void -acevals_init(acevals_t *vals, uid_t key) -{ - bzero(vals, sizeof (*vals)); - vals->allowed = ACE_MASK_UNDEFINED; - vals->denied = ACE_MASK_UNDEFINED; - vals->mask = ACE_MASK_UNDEFINED; - vals->key = key; -} - -static void -ace_list_init(ace_list_t *al, int dfacl_flag) -{ - acevals_init(&al->user_obj, NULL); - acevals_init(&al->group_obj, NULL); - acevals_init(&al->other_obj, NULL); - al->numusers = 0; - al->numgroups = 0; - al->acl_mask = 0; - al->hasmask = 0; - al->state = ace_unused; - al->seen = 0; - al->dfacl_flag = dfacl_flag; -} - -/* - * Find or create an acevals holder for a given id and avl tree. - * - * Note that only one thread will ever touch these avl trees, so - * there is no need for locking. - */ -static acevals_t * -acevals_find(ace_t *ace, avl_tree_t *avl, int *num) -{ - acevals_t key, *rc; - avl_index_t where; - - key.key = ace->a_who; - rc = avl_find(avl, &key, &where); - if (rc != NULL) - return (rc); - - /* this memory is freed by ln_ace_to_aent()->ace_list_free() */ - rc = calloc(1, sizeof (acevals_t)); - if (rc == NULL) - return (rc); - acevals_init(rc, ace->a_who); - avl_insert(avl, rc, where); - (*num)++; - - return (rc); -} - -static int -access_mask_check(ace_t *acep, int mask_bit, int isowner) -{ - int set_deny, err_deny; - int set_allow, err_allow; - int acl_consume; - int haswriteperm, hasreadperm; - - if (acep->a_type == ACE_ACCESS_DENIED_ACE_TYPE) { - haswriteperm = (acep->a_access_mask & ACE_WRITE_DATA) ? 0 : 1; - hasreadperm = (acep->a_access_mask & ACE_READ_DATA) ? 0 : 1; - } else { - haswriteperm = (acep->a_access_mask & ACE_WRITE_DATA) ? 1 : 0; - hasreadperm = (acep->a_access_mask & ACE_READ_DATA) ? 1 : 0; - } - - acl_consume = (ACL_SYNCHRONIZE_ERR_DENY | - ACL_DELETE_ERR_DENY | - ACL_WRITE_OWNER_ERR_DENY | - ACL_WRITE_OWNER_ERR_ALLOW | - ACL_WRITE_ATTRS_OWNER_SET_ALLOW | - ACL_WRITE_ATTRS_OWNER_ERR_DENY | - ACL_WRITE_ATTRS_WRITER_SET_DENY | - ACL_WRITE_ATTRS_WRITER_ERR_ALLOW | - ACL_WRITE_NAMED_WRITER_ERR_DENY | - ACL_READ_NAMED_READER_ERR_DENY); - - if (mask_bit == ACE_SYNCHRONIZE) { - set_deny = ACL_SYNCHRONIZE_SET_DENY; - err_deny = ACL_SYNCHRONIZE_ERR_DENY; - set_allow = ACL_SYNCHRONIZE_SET_ALLOW; - err_allow = ACL_SYNCHRONIZE_ERR_ALLOW; - } else if (mask_bit == ACE_WRITE_OWNER) { - set_deny = ACL_WRITE_OWNER_SET_DENY; - err_deny = ACL_WRITE_OWNER_ERR_DENY; - set_allow = ACL_WRITE_OWNER_SET_ALLOW; - err_allow = ACL_WRITE_OWNER_ERR_ALLOW; - } else if (mask_bit == ACE_DELETE) { - set_deny = ACL_DELETE_SET_DENY; - err_deny = ACL_DELETE_ERR_DENY; - set_allow = ACL_DELETE_SET_ALLOW; - err_allow = ACL_DELETE_ERR_ALLOW; - } else if (mask_bit == ACE_WRITE_ATTRIBUTES) { - if (isowner) { - set_deny = ACL_WRITE_ATTRS_OWNER_SET_DENY; - err_deny = ACL_WRITE_ATTRS_OWNER_ERR_DENY; - set_allow = ACL_WRITE_ATTRS_OWNER_SET_ALLOW; - err_allow = ACL_WRITE_ATTRS_OWNER_ERR_ALLOW; - } else if (haswriteperm) { - set_deny = ACL_WRITE_ATTRS_WRITER_SET_DENY; - err_deny = ACL_WRITE_ATTRS_WRITER_ERR_DENY; - set_allow = ACL_WRITE_ATTRS_WRITER_SET_ALLOW; - err_allow = ACL_WRITE_ATTRS_WRITER_ERR_ALLOW; - } else { - if ((acep->a_access_mask & mask_bit) && - (acep->a_type & ACE_ACCESS_ALLOWED_ACE_TYPE)) { - return (ENOTSUP); - } - return (0); - } - } else if (mask_bit == ACE_READ_NAMED_ATTRS) { - if (!hasreadperm) - return (0); - - set_deny = ACL_READ_NAMED_READER_SET_DENY; - err_deny = ACL_READ_NAMED_READER_ERR_DENY; - set_allow = ACL_READ_NAMED_READER_SET_ALLOW; - err_allow = ACL_READ_NAMED_READER_ERR_ALLOW; - } else if (mask_bit == ACE_WRITE_NAMED_ATTRS) { - if (!haswriteperm) - return (0); - - set_deny = ACL_WRITE_NAMED_WRITER_SET_DENY; - err_deny = ACL_WRITE_NAMED_WRITER_ERR_DENY; - set_allow = ACL_WRITE_NAMED_WRITER_SET_ALLOW; - err_allow = ACL_WRITE_NAMED_WRITER_ERR_ALLOW; - } else { - return (EINVAL); - } - - if (acep->a_type == ACE_ACCESS_DENIED_ACE_TYPE) { - if (acl_consume & set_deny) { - if (!(acep->a_access_mask & mask_bit)) { - return (ENOTSUP); - } - } else if (acl_consume & err_deny) { - if (acep->a_access_mask & mask_bit) { - return (ENOTSUP); - } - } - } else { - /* ACE_ACCESS_ALLOWED_ACE_TYPE */ - if (acl_consume & set_allow) { - if (!(acep->a_access_mask & mask_bit)) { - return (ENOTSUP); - } - } else if (acl_consume & err_allow) { - if (acep->a_access_mask & mask_bit) { - return (ENOTSUP); - } - } - } - return (0); -} - -static int -ace_to_aent_legal(ace_t *acep) -{ - int error = 0; - int isowner; - - /* only ALLOW or DENY */ - if ((acep->a_type != ACE_ACCESS_ALLOWED_ACE_TYPE) && - (acep->a_type != ACE_ACCESS_DENIED_ACE_TYPE)) { - error = ENOTSUP; - goto out; - } - - /* check for invalid flags */ - if (acep->a_flags & ~(ACE_VALID_FLAG_BITS)) { - error = EINVAL; - goto out; - } - - /* some flags are illegal */ - if (acep->a_flags & (ACE_SUCCESSFUL_ACCESS_ACE_FLAG | - ACE_FAILED_ACCESS_ACE_FLAG | - ACE_NO_PROPAGATE_INHERIT_ACE)) { - error = ENOTSUP; - goto out; - } - - /* check for invalid masks */ - if (acep->a_access_mask & ~(ACE_VALID_MASK_BITS)) { - error = EINVAL; - goto out; - } - - if ((acep->a_flags & ACE_OWNER)) { - isowner = 1; - } else { - isowner = 0; - } - - error = access_mask_check(acep, ACE_SYNCHRONIZE, isowner); - if (error) - goto out; - - error = access_mask_check(acep, ACE_WRITE_OWNER, isowner); - if (error) - goto out; - - error = access_mask_check(acep, ACE_DELETE, isowner); - if (error) - goto out; - - error = access_mask_check(acep, ACE_WRITE_ATTRIBUTES, isowner); - if (error) - goto out; - - error = access_mask_check(acep, ACE_READ_NAMED_ATTRS, isowner); - if (error) - goto out; - - error = access_mask_check(acep, ACE_WRITE_NAMED_ATTRS, isowner); - if (error) - goto out; - - /* more detailed checking of masks */ - if (acep->a_type == ACE_ACCESS_ALLOWED_ACE_TYPE) { - if (! (acep->a_access_mask & ACE_READ_ATTRIBUTES)) { - error = ENOTSUP; - goto out; - } - if ((acep->a_access_mask & ACE_WRITE_DATA) && - (! (acep->a_access_mask & ACE_APPEND_DATA))) { - error = ENOTSUP; - goto out; - } - if ((! (acep->a_access_mask & ACE_WRITE_DATA)) && - (acep->a_access_mask & ACE_APPEND_DATA)) { - error = ENOTSUP; - goto out; - } - } - - /* ACL enforcement */ - if ((acep->a_access_mask & ACE_READ_ACL) && - (acep->a_type != ACE_ACCESS_ALLOWED_ACE_TYPE)) { - error = ENOTSUP; - goto out; - } - if (acep->a_access_mask & ACE_WRITE_ACL) { - if ((acep->a_type == ACE_ACCESS_DENIED_ACE_TYPE) && - (isowner)) { - error = ENOTSUP; - goto out; - } - if ((acep->a_type == ACE_ACCESS_ALLOWED_ACE_TYPE) && - (! isowner)) { - error = ENOTSUP; - goto out; - } - } - -out: - return (error); -} - -static int -ace_mask_to_mode(uint32_t mask, o_mode_t *modep, int isdir) -{ - int error = 0; - o_mode_t mode = 0; - uint32_t bits, wantbits; - - /* read */ - if (mask & ACE_READ_DATA) - mode |= 04; - - /* write */ - wantbits = (ACE_WRITE_DATA | ACE_APPEND_DATA); - if (isdir) - wantbits |= ACE_DELETE_CHILD; - bits = mask & wantbits; - if (bits != 0) { - if (bits != wantbits) { - error = ENOTSUP; - goto out; - } - mode |= 02; - } - - /* exec */ - if (mask & ACE_EXECUTE) { - mode |= 01; - } - - *modep = mode; - -out: - return (error); -} - -static int -ace_allow_to_mode(uint32_t mask, o_mode_t *modep, int isdir) -{ - /* ACE_READ_ACL and ACE_READ_ATTRIBUTES must both be set */ - if ((mask & (ACE_READ_ACL | ACE_READ_ATTRIBUTES)) != - (ACE_READ_ACL | ACE_READ_ATTRIBUTES)) { - return (ENOTSUP); - } - - return (ace_mask_to_mode(mask, modep, isdir)); -} - -static int -acevals_to_aent(acevals_t *vals, aclent_t *dest, ace_list_t *list, - uid_t owner, gid_t group, int isdir) -{ - int error; - uint32_t flips = ACE_POSIX_SUPPORTED_BITS; - - if (isdir) - flips |= ACE_DELETE_CHILD; - if (vals->allowed != (vals->denied ^ flips)) { - error = ENOTSUP; - goto out; - } - if ((list->hasmask) && (list->acl_mask != vals->mask) && - (vals->aent_type & (USER | GROUP | GROUP_OBJ))) { - error = ENOTSUP; - goto out; - } - error = ace_allow_to_mode(vals->allowed, &dest->a_perm, isdir); - if (error != 0) - goto out; - dest->a_type = vals->aent_type; - if (dest->a_type & (USER | GROUP)) { - dest->a_id = vals->key; - } else if (dest->a_type & USER_OBJ) { - dest->a_id = owner; - } else if (dest->a_type & GROUP_OBJ) { - dest->a_id = group; - } else if (dest->a_type & OTHER_OBJ) { - dest->a_id = 0; - } else { - error = EINVAL; - goto out; - } - -out: - return (error); -} - -static int -ace_list_to_aent(ace_list_t *list, aclent_t **aclentp, int *aclcnt, - uid_t owner, gid_t group, int isdir) -{ - int error = 0; - aclent_t *aent, *result = NULL; - acevals_t *vals; - int resultcount; - - if ((list->seen & (USER_OBJ | GROUP_OBJ | OTHER_OBJ)) != - (USER_OBJ | GROUP_OBJ | OTHER_OBJ)) { - error = ENOTSUP; - goto out; - } - if ((! list->hasmask) && (list->numusers + list->numgroups > 0)) { - error = ENOTSUP; - goto out; - } - - resultcount = 3 + list->numusers + list->numgroups; - /* - * This must be the same condition as below, when we add the CLASS_OBJ - * (aka ACL mask) - */ - if ((list->hasmask) || (! list->dfacl_flag)) - resultcount += 1; - - result = aent = calloc(1, resultcount * sizeof (aclent_t)); - - if (result == NULL) { - error = ENOMEM; - goto out; - } - - /* USER_OBJ */ - if (!(list->user_obj.aent_type & USER_OBJ)) { - error = EINVAL; - goto out; - } - - error = acevals_to_aent(&list->user_obj, aent, list, owner, group, - isdir); - - if (error != 0) - goto out; - ++aent; - /* USER */ - vals = NULL; - for (vals = avl_first(&list->user); vals != NULL; - vals = AVL_NEXT(&list->user, vals)) { - if (!(vals->aent_type & USER)) { - error = EINVAL; - goto out; - } - error = acevals_to_aent(vals, aent, list, owner, group, - isdir); - if (error != 0) - goto out; - ++aent; - } - /* GROUP_OBJ */ - if (!(list->group_obj.aent_type & GROUP_OBJ)) { - error = EINVAL; - goto out; - } - error = acevals_to_aent(&list->group_obj, aent, list, owner, group, - isdir); - if (error != 0) - goto out; - ++aent; - /* GROUP */ - vals = NULL; - for (vals = avl_first(&list->group); vals != NULL; - vals = AVL_NEXT(&list->group, vals)) { - if (!(vals->aent_type & GROUP)) { - error = EINVAL; - goto out; - } - error = acevals_to_aent(vals, aent, list, owner, group, - isdir); - if (error != 0) - goto out; - ++aent; - } - /* - * CLASS_OBJ (aka ACL_MASK) - * - * An ACL_MASK is not fabricated if the ACL is a default ACL. - * This is to follow UFS's behavior. - */ - if ((list->hasmask) || (! list->dfacl_flag)) { - if (list->hasmask) { - uint32_t flips = ACE_POSIX_SUPPORTED_BITS; - if (isdir) - flips |= ACE_DELETE_CHILD; - error = ace_mask_to_mode(list->acl_mask ^ flips, - &aent->a_perm, isdir); - if (error != 0) - goto out; - } else { - /* fabricate the ACL_MASK from the group permissions */ - error = ace_mask_to_mode(list->group_obj.allowed, - &aent->a_perm, isdir); - if (error != 0) - goto out; - } - aent->a_id = 0; - aent->a_type = CLASS_OBJ | list->dfacl_flag; - ++aent; - } - /* OTHER_OBJ */ - if (!(list->other_obj.aent_type & OTHER_OBJ)) { - error = EINVAL; - goto out; - } - error = acevals_to_aent(&list->other_obj, aent, list, owner, group, - isdir); - if (error != 0) - goto out; - ++aent; - - *aclentp = result; - *aclcnt = resultcount; - -out: - if (error != 0) { - if (result != NULL) - free(result); - } - - return (error); -} - -/* - * free all data associated with an ace_list - */ -static void -ace_list_free(ace_list_t *al) -{ - acevals_t *node; - void *cookie; - - if (al == NULL) - return; - - cookie = NULL; - while ((node = avl_destroy_nodes(&al->user, &cookie)) != NULL) - free(node); - cookie = NULL; - while ((node = avl_destroy_nodes(&al->group, &cookie)) != NULL) - free(node); - - avl_destroy(&al->user); - avl_destroy(&al->group); - - /* free the container itself */ - free(al); -} - -static int -acevals_compare(const void *va, const void *vb) -{ - const acevals_t *a = va, *b = vb; - - if (a->key == b->key) - return (0); - - if (a->key > b->key) - return (1); - - else - return (-1); -} - -/* - * Convert a list of ace_t entries to equivalent regular and default - * aclent_t lists. Return error (ENOTSUP) when conversion is not possible. - */ -static int -ln_ace_to_aent(ace_t *ace, int n, uid_t owner, gid_t group, - aclent_t **aclentp, int *aclcnt, aclent_t **dfaclentp, int *dfaclcnt, - int isdir) -{ - int error = 0; - ace_t *acep; - uint32_t bits; - int i; - ace_list_t *normacl = NULL, *dfacl = NULL, *acl; - acevals_t *vals; - - *aclentp = NULL; - *aclcnt = 0; - *dfaclentp = NULL; - *dfaclcnt = 0; - - /* we need at least user_obj, group_obj, and other_obj */ - if (n < 6) { - error = ENOTSUP; - goto out; - } - if (ace == NULL) { - error = EINVAL; - goto out; - } - - normacl = calloc(1, sizeof (ace_list_t)); - - if (normacl == NULL) { - error = errno; - goto out; - } - - avl_create(&normacl->user, acevals_compare, sizeof (acevals_t), - offsetof(acevals_t, avl)); - avl_create(&normacl->group, acevals_compare, sizeof (acevals_t), - offsetof(acevals_t, avl)); - - ace_list_init(normacl, 0); - - dfacl = calloc(1, sizeof (ace_list_t)); - if (dfacl == NULL) { - error = errno; - goto out; - } - avl_create(&dfacl->user, acevals_compare, sizeof (acevals_t), - offsetof(acevals_t, avl)); - avl_create(&dfacl->group, acevals_compare, sizeof (acevals_t), - offsetof(acevals_t, avl)); - ace_list_init(dfacl, ACL_DEFAULT); - - /* process every ace_t... */ - for (i = 0; i < n; i++) { - acep = &ace[i]; - - /* rule out certain cases quickly */ - error = ace_to_aent_legal(acep); - if (error != 0) - goto out; - - /* - * Turn off these bits in order to not have to worry about - * them when doing the checks for compliments. - */ - acep->a_access_mask &= ~(ACE_WRITE_OWNER | ACE_DELETE | - ACE_SYNCHRONIZE | ACE_WRITE_ATTRIBUTES | - ACE_READ_NAMED_ATTRS | ACE_WRITE_NAMED_ATTRS); - - /* see if this should be a regular or default acl */ - bits = acep->a_flags & - (ACE_INHERIT_ONLY_ACE | - ACE_FILE_INHERIT_ACE | - ACE_DIRECTORY_INHERIT_ACE); - if (bits != 0) { - /* all or nothing on these inherit bits */ - if (bits != (ACE_INHERIT_ONLY_ACE | - ACE_FILE_INHERIT_ACE | - ACE_DIRECTORY_INHERIT_ACE)) { - error = ENOTSUP; - goto out; - } - acl = dfacl; - } else { - acl = normacl; - } - - if ((acep->a_flags & ACE_OWNER)) { - if (acl->state > ace_user_obj) { - error = ENOTSUP; - goto out; - } - acl->state = ace_user_obj; - acl->seen |= USER_OBJ; - vals = &acl->user_obj; - vals->aent_type = USER_OBJ | acl->dfacl_flag; - } else if ((acep->a_flags & ACE_EVERYONE)) { - acl->state = ace_other_obj; - acl->seen |= OTHER_OBJ; - vals = &acl->other_obj; - vals->aent_type = OTHER_OBJ | acl->dfacl_flag; - } else if (acep->a_flags & ACE_IDENTIFIER_GROUP) { - if (acl->state > ace_group) { - error = ENOTSUP; - goto out; - } - if ((acep->a_flags & ACE_GROUP)) { - acl->seen |= GROUP_OBJ; - vals = &acl->group_obj; - vals->aent_type = GROUP_OBJ | acl->dfacl_flag; - } else { - acl->seen |= GROUP; - vals = acevals_find(acep, &acl->group, - &acl->numgroups); - if (vals == NULL) { - error = ENOMEM; - goto out; - } - vals->aent_type = GROUP | acl->dfacl_flag; - } - acl->state = ace_group; - } else { - if (acl->state > ace_user) { - error = ENOTSUP; - goto out; - } - acl->state = ace_user; - acl->seen |= USER; - vals = acevals_find(acep, &acl->user, - &acl->numusers); - if (vals == NULL) { - error = ENOMEM; - goto out; - } - vals->aent_type = USER | acl->dfacl_flag; - } - - if (!(acl->state > ace_unused)) { - error = EINVAL; - goto out; - } - - if (acep->a_type == ACE_ACCESS_ALLOWED_ACE_TYPE) { - /* no more than one allowed per aclent_t */ - if (vals->allowed != ACE_MASK_UNDEFINED) { - error = ENOTSUP; - goto out; - } - vals->allowed = acep->a_access_mask; - } else { - /* - * it's a DENY; if there was a previous DENY, it - * must have been an ACL_MASK. - */ - if (vals->denied != ACE_MASK_UNDEFINED) { - /* ACL_MASK is for USER and GROUP only */ - if ((acl->state != ace_user) && - (acl->state != ace_group)) { - error = ENOTSUP; - goto out; - } - - if (! acl->hasmask) { - acl->hasmask = 1; - acl->acl_mask = vals->denied; - /* check for mismatched ACL_MASK emulations */ - } else if (acl->acl_mask != vals->denied) { - error = ENOTSUP; - goto out; - } - vals->mask = vals->denied; - } - vals->denied = acep->a_access_mask; - } - } - - /* done collating; produce the aclent_t lists */ - if (normacl->state != ace_unused) { - error = ace_list_to_aent(normacl, aclentp, aclcnt, - owner, group, isdir); - if (error != 0) { - goto out; - } - } - if (dfacl->state != ace_unused) { - error = ace_list_to_aent(dfacl, dfaclentp, dfaclcnt, - owner, group, isdir); - if (error != 0) { - goto out; - } - } - -out: - if (normacl != NULL) - ace_list_free(normacl); - if (dfacl != NULL) - ace_list_free(dfacl); - - return (error); -} - -static int -convert_ace_to_aent(ace_t *acebufp, int acecnt, int isdir, - uid_t owner, gid_t group, aclent_t **retaclentp, int *retaclcnt) -{ - int error; - aclent_t *aclentp, *dfaclentp; - int aclcnt, dfaclcnt; - - error = ln_ace_to_aent(acebufp, acecnt, owner, group, - &aclentp, &aclcnt, &dfaclentp, &dfaclcnt, isdir); - - if (error) - return (error); - - - if (dfaclcnt != 0) { - /* - * Slap aclentp and dfaclentp into a single array. - */ - aclentp = realloc(aclentp, (sizeof (aclent_t) * aclcnt) + - (sizeof (aclent_t) * dfaclcnt)); - if (aclentp != NULL) { - (void) memcpy(aclentp + aclcnt, - dfaclentp, sizeof (aclent_t) * dfaclcnt); - } else { - error = -1; - } - } - - if (aclentp) { - *retaclentp = aclentp; - *retaclcnt = aclcnt + dfaclcnt; - } - - if (dfaclentp) - free(dfaclentp); - - return (error); -} static int cacl_get(acl_inp inp, int get_flag, int type, acl_t **aclp) @@ -1576,56 +240,6 @@ facl_get(int fd, int get_flag, acl_t **aclp) return (cacl_get(acl_inp, get_flag, ACL_FD, aclp)); } -static int -acl_translate(acl_t *aclp, int target_flavor, int isdir, uid_t owner, - gid_t group) -{ - int aclcnt; - void *acldata; - int error; - - /* - * See if we need to translate - */ - if ((target_flavor == _ACL_ACE_ENABLED && aclp->acl_type == ACE_T) || - (target_flavor == _ACL_ACLENT_ENABLED && - aclp->acl_type == ACLENT_T)) - return (0); - - if (target_flavor == -1) - return (-1); - - if (target_flavor == _ACL_ACE_ENABLED && - aclp->acl_type == ACLENT_T) { - error = convert_aent_to_ace(aclp->acl_aclp, - aclp->acl_cnt, isdir, (ace_t **)&acldata, &aclcnt); - if (error) { - errno = error; - return (-1); - } - } else if (target_flavor == _ACL_ACLENT_ENABLED && - aclp->acl_type == ACE_T) { - error = convert_ace_to_aent(aclp->acl_aclp, aclp->acl_cnt, - isdir, owner, group, (aclent_t **)&acldata, &aclcnt); - if (error) { - errno = error; - return (-1); - } - } else { - errno = ENOTSUP; - return (-1); - } - - /* - * replace old acl with newly translated acl - */ - free(aclp->acl_aclp); - aclp->acl_aclp = acldata; - aclp->acl_cnt = aclcnt; - aclp->acl_type = (target_flavor == _ACL_ACE_ENABLED) ? ACE_T : ACLENT_T; - return (0); -} - /* * Set an ACL, translates acl to ace_t when appropriate. */ |