#include <atalk/logger.h>
#include <atalk/uuid.h>
#include <atalk/acl.h>
+#include <atalk/bstrlib.h>
+#include <atalk/bstradd.h>
#include "directory.h"
#include "desktop.h"
#include "volume.h"
#include "fork.h"
-
+#include "unix.h"
#include "acls.h"
#include "acl_mappings.h"
+#include "auth.h"
/* for map_acl() */
#define SOLARIS_2_DARWIN 1
#define IS_DIR 32
/********************************************************
- * Basic and helper funcs
+ * Solaris funcs
********************************************************/
-/*
- Takes a users name, uid and primary gid and checks if user is member of any group
- Returns -1 if no or error, 0 if yes
-*/
-static int check_group(char *name, uid_t uid _U_, gid_t pgid, gid_t path_gid)
+#ifdef HAVE_SOLARIS_ACLS
+
+/*!
+ * Compile access rights for a user to one file-system object
+ *
+ * This combines combines all access rights for a user to one fs-object and
+ * returns the result as a Darwin allowed rights ACE.
+ * This must honor trivial ACEs which are a mode_t mapping.
+ *
+ * @param path (r) path to filesystem object
+ * @param sb (r) struct stat of path
+ * @param result (w) resulting Darwin allow ACE
+ *
+ * @returns 0 or -1 on error
+ */
+static int solaris_acl_rights(const char *path,
+ const struct stat *sb,
+ uint32_t *result)
{
EC_INIT;
- int i;
- struct group *grp;
+ int i, ace_count, checkgroup;
+ ace_t *aces = NULL;
+ uid_t who;
+ uint16_t flags, type;
+ uint32_t rights, allowed_rights = 0, denied_rights = 0, darwin_rights;
- if (pgid == path_gid)
- return 0;
+ /* Get ACL from file/dir */
+ EC_NEG1_LOG(ace_count = get_nfsv4_acl(path, &aces));
- EC_NULL(grp = getgrgid(path_gid));
+ if (ace_count == 0) {
+ LOG(log_warning, logtype_afpd, "Zero ACEs from get_nfsv4_acl");
+ EC_FAIL;
+ }
+ /* Now check requested rights */
i = 0;
- while (grp->gr_mem[i] != NULL) {
- if ( (strcmp(grp->gr_mem[i], name)) == 0 ) {
- LOG(log_debug, logtype_afpd, "check_group: requested user:%s is member of: %s", name, grp->gr_name);
- return 0;
+ do { /* Loop through ACEs */
+ who = aces[i].a_who;
+ flags = aces[i].a_flags;
+ type = aces[i].a_type;
+ rights = aces[i].a_access_mask;
+
+ if (flags & ACE_INHERIT_ONLY_ACE)
+ continue;
+
+ /* Now the tricky part: decide if ACE effects our user. I'll explain:
+ if its a dedicated (non trivial) ACE for the user
+ OR
+ if its a ACE for a group we're member of
+ OR
+ if its a trivial ACE_OWNER ACE and requested UUID is the owner
+ OR
+ if its a trivial ACE_GROUP ACE and requested UUID is group
+ OR
+ if its a trivial ACE_EVERYONE ACE
+ THEN
+ process ACE */
+ if (((who == uuid) && !(flags & (ACE_TRIVIAL|ACE_IDENTIFIER_GROUP)))
+ ||
+ ((flags & ACE_IDENTIFIER_GROUP) && !(flags & ACE_GROUP) && gmem(who))
+ ||
+ ((flags & ACE_OWNER) && (uuid == sb->st_uid))
+ ||
+ ((flags & ACE_GROUP) && gmem(sb->st_gid))
+ ||
+ (flags & ACE_EVERYONE)
+ ) {
+ /* Found an applicable ACE */
+ if (type == ACE_ACCESS_ALLOWED_ACE_TYPE)
+ allowed_rights |= rights;
+ else if (type == ACE_ACCESS_DENIED_ACE_TYPE)
+ /* Only or to denied rights if not previously allowed !! */
+ denied_rights |= ((!allowed_rights) & rights);
}
- i++;
+ } while (++i < ace_count);
+
+
+ /* Darwin likes to ask for "delete_child" on dir,
+ "write_data" is actually the same, so we add that for dirs */
+ if (S_ISDIR(sb->st_mode) && (allowed_rights & ACE_WRITE_DATA))
+ allowed_rights |= ACE_DELETE_CHILD;
+
+ /* Remove denied from allowed rights */
+ allowed_rights &= ~denied_rights;
+
+ /* map rights */
+ darwin_rights = 0;
+ for (i=0; nfsv4_to_darwin_rights[i].from != 0; i++) {
+ if (allowed_rights & nfsv4_to_darwin_rights[i].from)
+ darwin_rights |= nfsv4_to_darwin_rights[i].to;
}
- return -1;
+ *result |= darwin_rights;
+
EC_CLEANUP:
+ if (aces) free(aces);
+
EC_EXIT;
}
-/********************************************************
- * Solaris funcs
- ********************************************************/
-
-#ifdef HAVE_SOLARIS_ACLS
-
/*
Maps ACE array from Solaris to Darwin. Darwin ACEs are stored in network byte order.
Return numer of mapped ACEs or -1 on error.
All errors while mapping (e.g. getting UUIDs from LDAP) are fatal.
*/
-static int map_aces_solaris_to_darwin(ace_t *aces, darwin_ace_t *darwin_aces, int ace_count)
+static int map_aces_solaris_to_darwin(const ace_t *aces,
+ darwin_ace_t *darwin_aces,
+ int ace_count)
{
EC_INIT;
int i, count = 0;
struct passwd *pwd = NULL;
struct group *grp = NULL;
- LOG(log_debug7, logtype_afpd, "map_aces_solaris_to_darwin: parsing %d ACES", ace_count);
+ LOG(log_maxdebug, logtype_afpd, "map_aces_solaris_to_darwin: parsing %d ACES", ace_count);
while(ace_count--) {
- LOG(log_debug7, logtype_afpd, "map_aces_solaris_to_darwin: parsing ACE No. %d", ace_count + 1);
+ LOG(log_maxdebug, logtype_afpd, "ACE No. %d", ace_count + 1);
/* if its a ACE resulting from nfsv4 mode mapping, discard it */
if (aces->a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE)) {
- LOG(log_debug, logtype_afpd, "map_aces_solaris_to_darwin: trivial ACE");
+ LOG(log_debug, logtype_afpd, "trivial ACE");
aces++;
continue;
}
- if ( ! (aces->a_flags & ACE_IDENTIFIER_GROUP) ) {
- /* its a user ace */
- LOG(log_debug, logtype_afpd, "map_aces_solaris_to_darwin: found user ACE with uid: %d", aces->a_who);
-
+ if ( ! (aces->a_flags & ACE_IDENTIFIER_GROUP) ) { /* user ace */
+ LOG(log_debug, logtype_afpd, "uid: %d", aces->a_who);
EC_NULL_LOG(pwd = getpwuid(aces->a_who));
- LOG(log_debug, logtype_afpd, "map_aces_solaris_to_darwin: uid: %d -> name: %s", aces->a_who, pwd->pw_name);
-
- EC_ZERO_LOG(getuuidfromname(pwd->pw_name, UUID_USER, darwin_aces->darwin_ace_uuid));
- } else {
- /* its a group ace */
- LOG(log_debug, logtype_afpd, "map_aces_solaris_to_darwin: found group ACE with gid: %d", aces->a_who);
-
+ LOG(log_debug, logtype_afpd, "uid: %d -> name: %s", aces->a_who, pwd->pw_name);
+ EC_ZERO_LOG(getuuidfromname(pwd->pw_name,
+ UUID_USER,
+ darwin_aces->darwin_ace_uuid));
+ } else { /* group ace */
+ LOG(log_debug, logtype_afpd, "gid: %d", aces->a_who);
EC_NULL_LOG(grp = getgrgid(aces->a_who));
- LOG(log_debug, logtype_afpd, "map_aces_solaris_to_darwin: gid: %d -> name: %s", aces->a_who, grp->gr_name);
- EC_ZERO_LOG(getuuidfromname(grp->gr_name, UUID_GROUP, darwin_aces->darwin_ace_uuid));
+ LOG(log_debug, logtype_afpd, "gid: %d -> name: %s", aces->a_who, grp->gr_name);
+ EC_ZERO_LOG(getuuidfromname(grp->gr_name,
+ UUID_GROUP,
+ darwin_aces->darwin_ace_uuid));
}
/* map flags */
Return numer of mapped ACEs or -1 on error.
All errors while mapping (e.g. getting UUIDs from LDAP) are fatal.
*/
-int map_aces_darwin_to_solaris(darwin_ace_t *darwin_aces, ace_t *nfsv4_aces, int ace_count)
+static int map_aces_darwin_to_solaris(darwin_ace_t *darwin_aces,
+ ace_t *nfsv4_aces,
+ int ace_count)
{
EC_INIT;
int i, mapped_aces = 0;
#ifdef HAVE_POSIX_ACLS
+static uint32_t posix_permset_to_darwin_rights(acl_entry_t e, int is_dir)
+{
+ EC_INIT;
+ uint32_t rights = 0;
+ acl_permset_t permset;
+
+ EC_ZERO_LOG(acl_get_permset(e, &permset));
+
+ if (acl_get_perm(permset, ACL_READ))
+ rights = DARWIN_ACE_READ_DATA
+ | DARWIN_ACE_READ_EXTATTRIBUTES
+ | DARWIN_ACE_READ_ATTRIBUTES
+ | DARWIN_ACE_READ_SECURITY;
+ if (acl_get_perm(permset, ACL_WRITE)) {
+ rights |= DARWIN_ACE_WRITE_DATA
+ | DARWIN_ACE_APPEND_DATA
+ | DARWIN_ACE_WRITE_EXTATTRIBUTES
+ | DARWIN_ACE_WRITE_ATTRIBUTES;
+ if (is_dir)
+ rights |= DARWIN_ACE_DELETE_CHILD;
+ }
+ if (acl_get_perm(permset, ACL_EXECUTE))
+ rights |= DARWIN_ACE_EXECUTE;
+
+EC_CLEANUP:
+ LOG(log_maxdebug, logtype_afpd, "mapped rights: 0x%08x", rights);
+ return rights;
+}
+
+/*!
+ * Compile access rights for a user to one file-system object
+ *
+ * This combines combines all access rights for a user to one fs-object and
+ * returns the result as a Darwin allowed rights ACE.
+ * This must honor trivial ACEs which are a mode_t mapping.
+ *
+ * @param path (r) path to filesystem object
+ * @param sb (r) struct stat of path
+ * @param result (rw) resulting Darwin allow ACE
+ *
+ * @returns 0 or -1 on error
+ */
+static int posix_acl_rights(const char *path,
+ const struct stat *sb,
+ uint32_t *result)
+{
+ EC_INIT;
+ int havemask = 0;
+ int entry_id = ACL_FIRST_ENTRY;
+ uint32_t rights = 0, maskrights = 0;
+ uid_t *uid = NULL;
+ gid_t *gid = NULL;
+ acl_t acl = NULL;
+ acl_entry_t e;
+ acl_tag_t tag;
+
+ EC_NULL_LOG(acl = acl_get_file(path, ACL_TYPE_ACCESS));
+
+ /* itereate through all ACEs to get the mask */
+ while (!havemask && acl_get_entry(acl, entry_id, &e) == 1) {
+ entry_id = ACL_NEXT_ENTRY;
+ EC_ZERO_LOG(acl_get_tag_type(e, &tag));
+ switch (tag) {
+ case ACL_MASK:
+ maskrights = posix_permset_to_darwin_rights(e, S_ISDIR(sb->st_mode));
+ LOG(log_maxdebug, logtype_afpd, "maskrights: 0x%08x", maskrights);
+ havemask = 1;
+ break;
+ default:
+ continue;
+ }
+ }
+
+ /* itereate through all ACEs */
+ entry_id = ACL_FIRST_ENTRY;
+ while (acl_get_entry(acl, entry_id, &e) == 1) {
+ entry_id = ACL_NEXT_ENTRY;
+ EC_ZERO_LOG(acl_get_tag_type(e, &tag));
+ switch (tag) {
+ case ACL_USER:
+ EC_NULL_LOG(uid = (uid_t *)acl_get_qualifier(e));
+ if (*uid == uuid) {
+ LOG(log_maxdebug, logtype_afpd, "ACL_USER: %u", *uid);
+ rights |= posix_permset_to_darwin_rights(e, S_ISDIR(sb->st_mode));
+ }
+ acl_free(uid);
+ uid = NULL;
+ break;
+ case ACL_USER_OBJ:
+ if (sb->st_uid == uuid) {
+ LOG(log_maxdebug, logtype_afpd, "ACL_USER_OBJ: %u", sb->st_uid);
+ rights |= posix_permset_to_darwin_rights(e, S_ISDIR(sb->st_mode));
+ }
+ break;
+ case ACL_GROUP:
+ EC_NULL_LOG(gid = (gid_t *)acl_get_qualifier(e));
+ if (gmem(*gid)) {
+ LOG(log_maxdebug, logtype_afpd, "ACL_GROUP: %u", *gid);
+ rights |= (posix_permset_to_darwin_rights(e, S_ISDIR(sb->st_mode)) & maskrights);
+ }
+ acl_free(gid);
+ gid = NULL;
+ break;
+ case ACL_GROUP_OBJ:
+ if (gmem(sb->st_gid)) {
+ LOG(log_maxdebug, logtype_afpd, "ACL_GROUP_OBJ: %u", sb->st_gid);
+ rights |= posix_permset_to_darwin_rights(e, S_ISDIR(sb->st_mode));
+ }
+ break;
+ case ACL_OTHER:
+ LOG(log_maxdebug, logtype_afpd, "ACL_OTHER");
+ rights |= posix_permset_to_darwin_rights(e, S_ISDIR(sb->st_mode));
+ break;
+ default:
+ continue;
+ }
+ } /* while */
+
+ *result |= rights;
+
+EC_CLEANUP:
+ if (acl) acl_free(acl);
+ if (uid) acl_free(uid);
+ if (gid) acl_free(gid);
+ EC_EXIT;
+}
+
/*!
* Add entries of one acl to another acl
*
{
EC_INIT;
int mapped_aces = 0;
- int havemask = 0;
int entry_id = ACL_FIRST_ENTRY;
acl_entry_t e;
acl_tag_t tag;
- acl_permset_t permset, mask;
uid_t *uid = NULL;
gid_t *gid = NULL;
struct passwd *pwd = NULL;
struct group *grp = NULL;
uint32_t flags;
- uint32_t rights;
+ uint32_t rights, maskrights = 0;
darwin_ace_t *saved_darwin_aces = darwin_aces;
LOG(log_maxdebug, logtype_afpd, "map_aces_posix_to_darwin(%s)",
gid = NULL;
break;
- /* store mask so we can apply it later in a second loop */
case ACL_MASK:
- EC_ZERO_LOG(acl_get_permset(e, &mask));
- havemask = 1;
+ maskrights = posix_permset_to_darwin_rights(e, type & IS_DIR);
continue;
default:
darwin_aces->darwin_ace_flags = htonl(flags);
/* rights */
- EC_ZERO_LOG(acl_get_permset(e, &permset));
-
- rights = 0;
- if (acl_get_perm(permset, ACL_READ))
- rights = DARWIN_ACE_READ_DATA
- | DARWIN_ACE_READ_EXTATTRIBUTES
- | DARWIN_ACE_READ_ATTRIBUTES
- | DARWIN_ACE_READ_SECURITY;
- if (acl_get_perm(permset, ACL_WRITE)) {
- rights |= DARWIN_ACE_WRITE_DATA
- | DARWIN_ACE_APPEND_DATA
- | DARWIN_ACE_WRITE_EXTATTRIBUTES
- | DARWIN_ACE_WRITE_ATTRIBUTES;
- if ((type & ~MAP_MASK) == IS_DIR)
- rights |= DARWIN_ACE_DELETE;
- }
- if (acl_get_perm(permset, ACL_EXECUTE))
- rights |= DARWIN_ACE_EXECUTE;
-
+ rights = posix_permset_to_darwin_rights(e, type & IS_DIR);
darwin_aces->darwin_ace_rights = htonl(rights);
darwin_aces++;
mapped_aces++;
} /* while */
- if (havemask) {
- /* Loop through the mapped ACE buffer once again, applying the mask */
- /* Map the mask to Darwin ACE rights first */
- rights = 0;
- if (acl_get_perm(mask, ACL_READ))
- rights = DARWIN_ACE_READ_DATA
- | DARWIN_ACE_READ_EXTATTRIBUTES
- | DARWIN_ACE_READ_ATTRIBUTES
- | DARWIN_ACE_READ_SECURITY;
- if (acl_get_perm(mask, ACL_WRITE)) {
- rights |= DARWIN_ACE_WRITE_DATA
- | DARWIN_ACE_APPEND_DATA
- | DARWIN_ACE_WRITE_EXTATTRIBUTES
- | DARWIN_ACE_WRITE_ATTRIBUTES;
- if ((type & ~MAP_MASK) == IS_DIR)
- rights |= DARWIN_ACE_DELETE;
- }
- if (acl_get_perm(mask, ACL_EXECUTE))
- rights |= DARWIN_ACE_EXECUTE;
- for (int i = mapped_aces; i > 0; i--) {
- saved_darwin_aces->darwin_ace_rights &= htonl(rights);
- saved_darwin_aces++;
- }
+ /* Loop through the mapped ACE buffer once again, applying the mask */
+ for (int i = mapped_aces; i > 0; i--) {
+ saved_darwin_aces->darwin_ace_rights &= htonl(maskrights);
+ saved_darwin_aces++;
}
+
EC_STATUS(mapped_aces);
EC_CLEANUP:
acl_t defacl = NULL , accacl = NULL;
/* stat to check if its a dir */
- EC_ZERO_LOG(stat(name, &st));
+ EC_ZERO_LOG(lstat(name, &st));
/* if its a dir, check for default acl too */
dirflag = 0;
EC_STATUS(AFPERR_PARAM);
goto EC_CLEANUP;
}
- new_aces_count += ace_count;
- LOG(log_debug7, logtype_afpd, "set_acl: mapped %d ACEs from client", ace_count);
+ new_aces_count += ret;
+ LOG(log_debug7, logtype_afpd, "set_acl: mapped %d ACEs from client", ret);
/* Now copy the trivial ACEs */
for (i=0; i < nfsv4_ace_count; i++) {
LOG(log_maxdebug, logtype_afpd, "set_acl: BEGIN");
struct stat st;
- EC_ZERO_LOG_ERR(stat(name, &st), AFPERR_NOOBJ);
+ EC_ZERO_LOG_ERR(lstat(name, &st), AFPERR_NOOBJ);
/* seed default ACL with access ACL */
if (S_ISDIR(st.st_mode))
}
#endif /* HAVE_POSIX_ACLS */
-/*
- Checks if a given UUID has requested_rights(type darwin_ace_rights) for path.
- Note: this gets called frequently and is a good place for optimizations !
+/*!
+ * Checks if a given UUID has requested_rights(type darwin_ace_rights) for path.
+ *
+ * Note: this gets called frequently and is a good place for optimizations !
+ *
+ * @param vol (r) volume
+ * @param dir (r) directory
+ * @param path (r) path to filesystem object
+ * @param uuid (r) UUID of user
+ * @param requested_rights (r) requested Darwin ACE
+ *
+ * @returns AFP result code
*/
-#ifdef HAVE_SOLARIS_ACLS
-static int check_acl_access(const char *path, const uuidp_t uuid, uint32_t requested_darwin_rights)
+static int check_acl_access(const struct vol *vol,
+ const struct dir *dir,
+ const char *path,
+ const uuidp_t uuid,
+ uint32_t requested_rights)
{
- int ret, i, ace_count, dir, checkgroup;
- char *username = NULL; /* might be group too */
- uuidtype_t uuidtype;
- uid_t uid;
- gid_t pgid;
- uint32_t requested_rights = 0, allowed_rights = 0, denied_rights = 0;
- ace_t *aces;
- struct passwd *pwd;
- struct stat st;
- int check_user_trivace = 0, check_group_trivace = 0;
- uid_t who;
- uint16_t flags;
- uint16_t type;
- uint32_t rights;
-
-#ifdef DEBUG
- LOG(log_debug9, logtype_afpd, "check_access: BEGIN. Request: %08x", requested_darwin_rights);
-#endif
- /* Get uid or gid from UUID */
- if ( (getnamefromuuid(uuid, &username, &uuidtype)) != 0) {
- LOG(log_error, logtype_afpd, "check_access: error getting name from UUID");
- return AFPERR_PARAM;
- }
+ int ret;
+ uint32_t allowed_rights = 0;
+ char *username = NULL;
+ uuidtype_t uuidtype;
+ struct stat st;
+ bstring parent = NULL;
- /* File or dir */
- if ((lstat(path, &st)) != 0) {
- LOG(log_error, logtype_afpd, "check_access: stat: %s", strerror(errno));
- ret = AFPERR_PARAM;
- goto exit;
- }
- dir = S_ISDIR(st.st_mode);
+ LOG(log_maxdebug, logtype_afpd, "check_access: Request: 0x%08x", requested_rights);
- if (uuidtype == UUID_USER) {
- pwd = getpwnam(username);
- if (!pwd) {
- LOG(log_error, logtype_afpd, "check_access: getpwnam: %s", strerror(errno));
- ret = AFPERR_MISC;
- goto exit;
- }
- uid = pwd->pw_uid;
- pgid = pwd->pw_gid;
-
- /* If user is file/dir owner we must check the user trivial ACE */
- if (uid == st.st_uid) {
- LOG(log_debug, logtype_afpd, "check_access: user: %s is files owner. Must check trivial user ACE", username);
- check_user_trivace = 1;
- }
-
- /* Now check if requested user is files owning group. If yes we must check the group trivial ACE */
- if ( (check_group(username, uid, pgid, st.st_gid)) == 0) {
- LOG(log_debug, logtype_afpd, "check_access: user: %s is in group: %d. Must check trivial group ACE", username, st.st_gid);
- check_group_trivace = 1;
- }
- } else { /* hopefully UUID_GROUP*/
- LOG(log_error, logtype_afpd, "check_access: afp_access for UUID of groups not supported!");
-#if 0
- grp = getgrnam(username);
- if (!grp) {
- LOG(log_error, logtype_afpd, "check_access: getgrnam: %s", strerror(errno));
- return -1;
- }
- if (st.st_gid == grp->gr_gid )
- check_group_trivace = 1;
-#endif
- }
+ /* Get uid or gid from UUID */
+ EC_ZERO_LOG_ERR(getnamefromuuid(uuid, &username, &uuidtype), AFPERR_PARAM);
+ EC_ZERO_LOG_ERR(lstat(path, &st), AFPERR_PARAM);
- /* Map requested rights to Solaris style. */
- for (i=0; darwin_to_nfsv4_rights[i].from != 0; i++) {
- if (requested_darwin_rights & darwin_to_nfsv4_rights[i].from)
- requested_rights |= darwin_to_nfsv4_rights[i].to;
- }
+ switch (uuidtype) {
+ case UUID_USER:
+ break;
+ case UUID_GROUP:
+ LOG(log_warning, logtype_afpd, "check_access: afp_access not supported for groups");
+ EC_STATUS(AFPERR_MISC);
+ goto EC_CLEANUP;
- /* Get ACL from file/dir */
- if ( (ace_count = get_nfsv4_acl(path, &aces)) == -1) {
- LOG(log_error, logtype_afpd, "check_access: error getting ACEs");
- ret = AFPERR_MISC;
- goto exit;
- }
- if (ace_count == 0) {
- LOG(log_debug, logtype_afpd, "check_access: 0 ACEs from get_nfsv4_acl");
- ret = AFPERR_MISC;
- goto exit;
+ case UUID_LOCAL:
+ LOG(log_warning, logtype_afpd, "check_access: local UUID");
+ EC_STATUS(AFPERR_MISC);
+ goto EC_CLEANUP;
}
- /* Now check requested rights */
- ret = AFPERR_ACCESS;
- i = 0;
- do { /* Loop through ACEs */
- who = aces[i].a_who;
- flags = aces[i].a_flags;
- type = aces[i].a_type;
- rights = aces[i].a_access_mask;
+#ifdef HAVE_SOLARIS_ACLS
+ EC_ZERO_LOG(solaris_acl_rights(path, &st, &allowed_rights));
+#endif
+#ifdef HAVE_POSIX_ACLS
+ EC_ZERO_LOG(posix_acl_rights(path, &st, &allowed_rights));
+#endif
- if (flags & ACE_INHERIT_ONLY_ACE)
- continue;
+ LOG(log_debug, logtype_afpd, "allowed rights: 0x%08x", allowed_rights);
- /* Check if its a group ACE and set checkgroup to 1 if yes */
- checkgroup = 0;
- if ( (flags & ACE_IDENTIFIER_GROUP) && !(flags & ACE_GROUP) ) {
- if ( (check_group(username, uid, pgid, who)) == 0)
- checkgroup = 1;
- else
- continue;
- }
+ /*
+ * The DARWIN_ACE_DELETE right might implicitly result from write acces to the parent
+ * directory. As it seems the 10.6 AFP client is puzzled when this right is not
+ * allowed where a delete would succeed because the parent dir gives write perms.
+ * So we check the parent dir for write access and set the right accordingly.
+ * Currentyl acl2ownermode calls us with dir = NULL, because it doesn't make sense
+ * there to do this extra check -- afaict.
+ */
+ if (vol && dir && (requested_rights & DARWIN_ACE_DELETE)) {
+ int i;
+ uint32_t parent_rights = 0;
- /* Now the tricky part: decide if ACE effects our user. I'll explain:
- if its a dedicated (non trivial) ACE for the user
- OR
- if its a ACE for a group we're member of
- OR
- if its a trivial ACE_OWNER ACE and requested UUID is the owner
- OR
- if its a trivial ACE_GROUP ACE and requested UUID is group
- OR
- if its a trivial ACE_EVERYONE ACE
- THEN
- process ACE */
- if (
- ( (who == uid) && !(flags & (ACE_TRIVIAL|ACE_IDENTIFIER_GROUP)) ) ||
- (checkgroup) ||
- ( (flags & ACE_OWNER) && check_user_trivace ) ||
- ( (flags & ACE_GROUP) && check_group_trivace ) ||
- ( flags & ACE_EVERYONE )
- ) {
- /* Found an applicable ACE */
- if (type == ACE_ACCESS_ALLOWED_ACE_TYPE)
- allowed_rights |= rights;
- else if (type == ACE_ACCESS_DENIED_ACE_TYPE)
- /* Only or to denied rights if not previously allowed !! */
- denied_rights |= ((!allowed_rights) & rights);
+ if (dir->d_did == DIRDID_ROOT_PARENT) {
+ /* use volume path */
+ EC_NULL_LOG_ERR(parent = bfromcstr(vol->v_path), AFPERR_MISC);
+ } else {
+ /* build path for parent */
+ EC_NULL_LOG_ERR(parent = bstrcpy(dir->d_fullpath), AFPERR_MISC);
+ EC_ZERO_LOG_ERR(bconchar(parent, '/'), AFPERR_MISC);
+ EC_ZERO_LOG_ERR(bcatcstr(parent, path), AFPERR_MISC);
+ EC_NEG1_LOG_ERR(i = bstrrchr(parent, '/'), AFPERR_MISC);
+ EC_ZERO_LOG_ERR(binsertch(parent, i, 1, 0), AFPERR_MISC);
}
- } while (++i < ace_count);
+ LOG(log_debug, logtype_afpd,"parent: %s", cfrombstr(parent));
+ EC_ZERO_LOG_ERR(lstat(cfrombstr(parent), &st), AFPERR_MISC);
- /* Darwin likes to ask for "delete_child" on dir,
- "write_data" is actually the same, so we add that for dirs */
- if (dir && (allowed_rights & ACE_WRITE_DATA))
- allowed_rights |= ACE_DELETE_CHILD;
+#ifdef HAVE_SOLARIS_ACLS
+ EC_ZERO_LOG(solaris_acl_rights(cfrombstr(parent), &st, &parent_rights));
+#endif
+#ifdef HAVE_POSIX_ACLS
+ EC_ZERO_LOG(posix_acl_rights(path, &st, &allowed_rights));
+#endif
+ if (parent_rights & (DARWIN_ACE_WRITE_DATA | DARWIN_ACE_DELETE_CHILD))
+ allowed_rights |= DARWIN_ACE_DELETE; /* man, that was a lot of work! */
+ }
- if (requested_rights & denied_rights) {
- LOG(log_debug, logtype_afpd, "check_access: some requested right was denied:");
- ret = AFPERR_ACCESS;
- } else if ((requested_rights & allowed_rights) != requested_rights) {
- LOG(log_debug, logtype_afpd, "check_access: some requested right wasn't allowed:");
- ret = AFPERR_ACCESS;
+ if ((requested_rights & allowed_rights) != requested_rights) {
+ LOG(log_debug, logtype_afpd, "some requested right wasn't allowed: 0x%08x / 0x%08x",
+ requested_rights, allowed_rights);
+ EC_STATUS(AFPERR_ACCESS);
} else {
- LOG(log_debug, logtype_afpd, "check_access: all requested rights are allowed:");
- ret = AFP_OK;
+ LOG(log_debug, logtype_afpd, "all requested rights are allowed: 0x%08x",
+ requested_rights);
+ EC_STATUS(AFP_OK);
}
- LOG(log_debug, logtype_afpd, "check_access: Requested rights: %08x, allowed_rights: %08x, denied_rights: %08x, Result: %d",
- requested_rights, allowed_rights, denied_rights, ret);
-
-exit:
- free(aces);
- free(username);
-#ifdef DEBUG
- LOG(log_debug9, logtype_afpd, "check_access: END");
-#endif
- return ret;
-}
-#endif /* HAVE_SOLARIS_ACLS */
+EC_CLEANUP:
+ if (username) free(username);
+ if (parent) bdestroy(parent);
-#ifdef HAVE_POSIX_ACLS
-static int check_acl_access(const char *path, const uuidp_t uuid, uint32_t requested_darwin_rights)
-{
- /*
- * FIXME: for OS X >= 10.6 it seems fp_access isn't called anymore, instead
- * the client just tries to perform any action, relying on the server
- * to enforce permission (which the OS does for us), returning appropiate
- * error codes in case the action failed.
- * So to summarize: I think it's safe to not implement this function and
- * just always return AFP_OK.
- */
- return AFP_OK;
+ EC_EXIT;
}
-#endif /* HAVE_POSIX_ACLS */
/********************************************************
* Interface
struct path *s_path;
uuidp_t uuid;
- LOG(log_debug9, logtype_afpd, "afp_access: BEGIN");
-
*rbuflen = 0;
ibuf += 2;
return AFPERR_NOOBJ;
}
- ret = check_acl_access(s_path->u_name, uuid, darwin_ace_rights);
+ ret = check_acl_access(vol, dir, s_path->u_name, uuid, darwin_ace_rights);
- LOG(log_debug9, logtype_afpd, "afp_access: END");
return ret;
}
/* Shall we return ACL ? */
if (bitmap & kFileSec_ACL) {
LOG(log_debug, logtype_afpd, "afp_getacl: client requested files ACL");
- get_and_map_acl(s_path->u_name, rbuf, rbuflen);
+ if (get_and_map_acl(s_path->u_name, rbuf, rbuflen) != 0) {
+ LOG(log_error, logtype_afpd, "afp_getacl(\"%s/%s\"): mapping error",
+ getcwdpath(), s_path->u_name);
+ return AFPERR_MISC;
+ }
}
LOG(log_debug9, logtype_afpd, "afp_getacl: END");
return ret;
}
-/*
- unix.c/accessmode calls this: map ACL to OS 9 mode
-*/
-void acltoownermode(char *path, struct stat *st, uid_t uid, struct maccess *ma)
-{
- struct passwd *pw;
- atalk_uuid_t uuid;
- int r_ok, w_ok, x_ok;
+/********************************************************************
+ * ACL funcs interfacing with other parts
+ ********************************************************************/
- if ( ! (AFPobj->options.flags & OPTION_UUID) || ! (AFPobj->options.flags & OPTION_ACL2UARIGHTS))
- return;
+/*!
+ * map ACL to user maccess
+ *
+ * This is the magic function that makes ACLs usable by calculating
+ * the access granted by ACEs to the logged in user.
+ */
+int acltoownermode(char *path, struct stat *st, struct maccess *ma)
+{
+ EC_INIT;
+ uint32_t rights = 0;
- LOG(log_maxdebug, logtype_afpd, "acltoownermode('%s')", path);
+ if ( ! (AFPobj->options.flags & OPTION_ACL2MACCESS)
+ || (current_vol == NULL)
+ || ! (current_vol->v_flags & AFPVOL_ACLS))
+ return 0;
- if ((pw = getpwuid(uid)) == NULL) {
- LOG(log_error, logtype_afpd, "acltoownermode: %s", strerror(errno));
- return;
- }
+ LOG(log_maxdebug, logtype_afpd, "acltoownermode(\"%s/%s\", 0x%02x)",
+ getcwdpath(), path, ma->ma_user);
- /* We need the UUID for check_acl_access */
- if ((getuuidfromname(pw->pw_name, UUID_USER, uuid)) != 0)
- return;
+#ifdef HAVE_SOLARIS_ACLS
+ EC_ZERO_LOG(solaris_acl_rights(path, st, &rights));
+#endif
+#ifdef HAVE_POSIX_ACLS
+ EC_ZERO_LOG(posix_acl_rights(path, st, &rights));
+#endif
- /* These work for files and dirs */
- r_ok = check_acl_access(path, uuid, DARWIN_ACE_READ_DATA);
- w_ok = check_acl_access(path, uuid, (DARWIN_ACE_WRITE_DATA|DARWIN_ACE_APPEND_DATA));
- x_ok = check_acl_access(path, uuid, DARWIN_ACE_EXECUTE);
+ LOG(log_maxdebug, logtype_afpd, "rights: 0x%08x", rights);
- LOG(log_debug7, logtype_afpd, "acltoownermode: ma_user before: %04o",ma->ma_user);
- if (r_ok == 0)
+ if (rights & DARWIN_ACE_READ_DATA)
ma->ma_user |= AR_UREAD;
- if (w_ok == 0)
+ if (rights & DARWIN_ACE_WRITE_DATA)
ma->ma_user |= AR_UWRITE;
- if (x_ok == 0)
+ if (rights & (DARWIN_ACE_EXECUTE | DARWIN_ACE_SEARCH))
ma->ma_user |= AR_USEARCH;
- LOG(log_debug7, logtype_afpd, "acltoownermode: ma_user after: %04o", ma->ma_user);
- return;
+ LOG(log_maxdebug, logtype_afpd, "resulting user maccess: 0x%02x", ma->ma_user);
+
+EC_CLEANUP:
+ EC_EXIT;
}
-/*
- We're being called at the end of afp_createdir. We're (hopefully) inside dir
- and ".AppleDouble" and ".AppleDouble/.Parent" should have already been created.
- We then inherit any explicit ACE from "." to ".AppleDouble" and ".AppleDouble/.Parent".
- FIXME: add to VFS layer ?
-*/
-#ifdef HAVE_SOLARIS_ACLS
-void addir_inherit_acl(const struct vol *vol)
+/*!
+ * Check whether a volume supports ACLs
+ *
+ * @param vol (r) volume
+ *
+ * @returns 0 if not, 1 if yes
+ */
+int check_vol_acl_support(const struct vol *vol)
{
- ace_t *diraces = NULL, *adaces = NULL, *combinedaces = NULL;
- int diracecount, adacecount;
-
- LOG(log_debug9, logtype_afpd, "addir_inherit_acl: BEGIN");
-
- /* Check if ACLs are enabled for the volume */
- if (vol->v_flags & AFPVOL_ACLS) {
-
- if ((diracecount = get_nfsv4_acl(".", &diraces)) <= 0)
- goto cleanup;
- /* Remove any trivial ACE from "." */
- if ((diracecount = strip_trivial_aces(&diraces, diracecount)) <= 0)
- goto cleanup;
-
- /*
- Inherit to ".AppleDouble"
- */
-
- if ((adacecount = get_nfsv4_acl(".AppleDouble", &adaces)) <= 0)
- goto cleanup;
- /* Remove any non-trivial ACE from ".AppleDouble" */
- if ((adacecount = strip_nontrivial_aces(&adaces, adacecount)) <= 0)
- goto cleanup;
-
- /* Combine ACEs */
- if ((combinedaces = concat_aces(diraces, diracecount, adaces, adacecount)) == NULL)
- goto cleanup;
-
- /* Now set new acl */
- if ((acl(".AppleDouble", ACE_SETACL, diracecount + adacecount, combinedaces)) != 0)
- LOG(log_error, logtype_afpd, "addir_inherit_acl: acl: %s", strerror(errno));
-
- free(adaces);
- adaces = NULL;
- free(combinedaces);
- combinedaces = NULL;
-
- /*
- Inherit to ".AppleDouble/.Parent"
- */
-
- if ((adacecount = get_nfsv4_acl(".AppleDouble/.Parent", &adaces)) <= 0)
- goto cleanup;
- if ((adacecount = strip_nontrivial_aces(&adaces, adacecount)) <= 0)
- goto cleanup;
-
- /* Combine ACEs */
- if ((combinedaces = concat_aces(diraces, diracecount, adaces, adacecount)) == NULL)
- goto cleanup;
-
- /* Now set new acl */
- if ((acl(".AppleDouble/.Parent", ACE_SETACL, diracecount + adacecount, combinedaces)) != 0)
- LOG(log_error, logtype_afpd, "addir_inherit_acl: acl: %s", strerror(errno));
-
+ int ret = 1;
- }
-
-cleanup:
- LOG(log_debug9, logtype_afpd, "addir_inherit_acl: END");
-
- free(diraces);
- free(adaces);
- free(combinedaces);
-}
-#endif /* HAVE_SOLARIS_ACLS */
+#ifdef HAVE_SOLARIS_ACLS
+ ace_t *aces = NULL;
+ if (get_nfsv4_acl(vol->v_path, &aces) == -1)
+ ret = 0;
+#endif
+#ifdef HAVE_POSIX_ACLS
+ acl_t acl = NULL;
+ if ((acl = acl_get_file(vol->v_path, ACL_TYPE_ACCESS)) == NULL)
+ ret = 0;
+#endif
+#ifdef HAVE_SOLARIS_ACLS
+ if (aces) free(aces);
+#endif
#ifdef HAVE_POSIX_ACLS
-void addir_inherit_acl(const struct vol *vol)
-{
- return;
-}
+ if (acl) acl_free(acl);
#endif /* HAVE_POSIX_ACLS */
+
+ LOG(log_debug, logtype_afpd, "Volume \"%s\" ACL support: %s",
+ vol->v_path, ret ? "yes" : "no");
+ return ret;
+}
projects / netatalk.git / blobdiff