/*
- Copyright (c) 2008,2009 Frank Lahm <franklahm@gmail.com>
+ Copyright (c) 2008, 2009, 2010 Frank Lahm <franklahm@gmail.com>
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
#include <grp.h>
#include <pwd.h>
#include <errno.h>
+#ifdef HAVE_SOLARIS_ACLS
#include <sys/acl.h>
+#endif
+#ifdef HAVE_POSIX_ACLS
+#include <sys/acl.h>
+#include <acl/libacl.h>
+#endif
+#include <atalk/errchk.h>
#include <atalk/adouble.h>
#include <atalk/vfs.h>
#include <atalk/afp.h>
#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 DARWIN_2_SOLARIS 2
+#define SOLARIS_2_DARWIN 1
+#define DARWIN_2_SOLARIS 2
+#define POSIX_DEFAULT_2_DARWIN 3
+#define POSIX_ACCESS_2_DARWIN 4
+#define DARWIN_2_POSIX_DEFAULT 5
+#define DARWIN_2_POSIX_ACCESS 6
+
+#define MAP_MASK 31
+#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, 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)
{
- int i;
- struct group *grp;
+ EC_INIT;
+ 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));
- grp = getgrgid(path_gid);
- if (!grp)
- return -1;
+ if (ace_count == 0)
+ goto EC_CLEANUP;
+ /* 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;
}
/*
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;
uint32_t flags;
uint32_t rights;
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);
- pwd = getpwuid(aces->a_who);
- if (!pwd) {
- LOG(log_error, logtype_afpd, "map_aces_solaris_to_darwin: getpwuid error: %s", strerror(errno));
- return -1;
- }
- LOG(log_debug, logtype_afpd, "map_aces_solaris_to_darwin: uid: %d -> name: %s", aces->a_who, pwd->pw_name);
- if ( (getuuidfromname(pwd->pw_name, UUID_USER, darwin_aces->darwin_ace_uuid)) != 0) {
- LOG(log_error, logtype_afpd, "map_aces_solaris_to_darwin: getuuidfromname error");
- return -1;
- }
- } else {
- /* its a group ace */
- LOG(log_debug, logtype_afpd, "map_aces_solaris_to_darwin: found group ACE with gid: %d", aces->a_who);
- grp = getgrgid(aces->a_who);
- if (!grp) {
- LOG(log_error, logtype_afpd, "map_aces_solaris_to_darwin: getgrgid error: %s", strerror(errno));
- return -1;
- }
- LOG(log_debug, logtype_afpd, "map_aces_solaris_to_darwin: gid: %d -> name: %s", aces->a_who, grp->gr_name);
- if ( (getuuidfromname(grp->gr_name, UUID_GROUP, darwin_aces->darwin_ace_uuid)) != 0) {
- LOG(log_error, logtype_afpd, "map_aces_solaris_to_darwin: getuuidfromname error");
- return -1;
- }
+ 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, "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, "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 count;
+EC_CLEANUP:
+ EC_EXIT;
}
/*
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;
uint32_t darwin_ace_flags;
uint32_t darwin_ace_rights;
uint16_t nfsv4_ace_flags;
uint32_t nfsv4_ace_rights;
- char *name;
+ char *name = NULL;
uuidtype_t uuidtype;
struct passwd *pwd;
struct group *grp;
nfsv4_ace_rights = 0;
/* uid/gid first */
- if ( (getnamefromuuid(darwin_aces->darwin_ace_uuid, &name, &uuidtype)) != 0)
- return -1;
- if (uuidtype == UUID_USER) {
- pwd = getpwnam(name);
- if (!pwd) {
- LOG(log_error, logtype_afpd, "map_aces_darwin_to_solaris: getpwnam: %s", strerror(errno));
- free(name);
- return -1;
- }
+ EC_ZERO(getnamefromuuid(darwin_aces->darwin_ace_uuid, &name, &uuidtype));
+ switch (uuidtype) {
+ case UUID_LOCAL:
+ free(name);
+ name = NULL;
+ darwin_aces++;
+ continue;
+ case UUID_USER:
+ EC_NULL_LOG(pwd = getpwnam(name));
nfsv4_aces->a_who = pwd->pw_uid;
- } else { /* hopefully UUID_GROUP*/
- grp = getgrnam(name);
- if (!grp) {
- LOG(log_error, logtype_afpd, "map_aces_darwin_to_solaris: getgrnam: %s", strerror(errno));
- free(name);
- return -1;
- }
+ break;
+ case UUID_GROUP:
+ EC_NULL_LOG(grp = getgrnam(name));
nfsv4_aces->a_who = (uid_t)(grp->gr_gid);
nfsv4_ace_flags |= ACE_IDENTIFIER_GROUP;
+ break;
}
free(name);
name = NULL;
}
return mapped_aces;
+EC_CLEANUP:
+ if (name)
+ free(name);
+ EC_EXIT;
}
+#endif /* HAVE_SOLARIS_ACLS */
/********************************************************
- * 2nd level funcs
+ * POSIX 1e funcs
********************************************************/
-/* Map between ACL styles (SOLARIS_2_DARWIN, DARWIN_2_SOLARIS).
- Reads from 'aces' buffer, writes to 'rbuf' buffer.
- Caller must provide buffer.
- Darwin ACEs are read and written in network byte order.
- Needs to know how many ACEs are in the ACL (ace_count). Ignores trivial ACEs.
- Return no of mapped ACEs or -1 on error. */
-static int map_acl(int type, ace_t *nfsv4_aces, darwin_ace_t *buf, int ace_count)
+#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
+ *
+ * @param aclp (rw) destination acl where new aces will be added
+ * @param acl (r) source acl where aces will be copied from
+ *
+ * @returns 0 on success, -1 on error
+ */
+static int acl_add_acl(acl_t *aclp, const acl_t acl)
+{
+ EC_INIT;
+ int id;
+ acl_entry_t se, de;
+
+ for (id = ACL_FIRST_ENTRY; acl_get_entry(acl, id, &se) == 1; id = ACL_NEXT_ENTRY) {
+ EC_ZERO_LOG_ERR(acl_create_entry(aclp, &de), AFPERR_MISC);
+ EC_ZERO_LOG_ERR(acl_copy_entry(de, se), AFPERR_MISC);
+ }
+
+EC_CLEANUP:
+ EC_EXIT;
+}
+
+/*!
+ * Map Darwin ACE rights to POSIX 1e perm
+ *
+ * We can only map few rights:
+ * DARWIN_ACE_READ_DATA -> ACL_READ
+ * DARWIN_ACE_WRITE_DATA -> ACL_WRITE
+ * DARWIN_ACE_DELETE_CHILD & (is_dir == 1) -> ACL_WRITE
+ * DARWIN_ACE_EXECUTE -> ACL_EXECUTE
+ *
+ * @param entry (rw) result of the mapping
+ * @param is_dir (r) 1 for dirs, 0 for files
+ *
+ * @returns mapping result as acl_perm_t, -1 on error
+ */
+static acl_perm_t map_darwin_right_to_posix_permset(uint32_t darwin_ace_rights, int is_dir)
+{
+ acl_perm_t perm = 0;
+
+ if (darwin_ace_rights & DARWIN_ACE_READ_DATA)
+ perm |= ACL_READ;
+
+ if (darwin_ace_rights & (DARWIN_ACE_WRITE_DATA | (DARWIN_ACE_DELETE_CHILD & is_dir)))
+ perm |= ACL_WRITE;
+
+ if (darwin_ace_rights & DARWIN_ACE_EXECUTE)
+ perm |= ACL_EXECUTE;
+
+ return perm;
+}
+
+/*!
+ * Add a ACL_USER or ACL_GROUP permission to an ACL, extending existing ACEs
+ *
+ * Add a permission of "type" for user or group "id" to an ACL. Scan the ACL
+ * for existing permissions for this type/id, if there is one add the perm,
+ * otherwise create a new ACL entry.
+ * perm can be or'ed ACL_READ, ACL_WRITE and ACL_EXECUTE.
+ *
+ * @param aclp (rw) pointer to ACL
+ * @param type (r) acl_tag_t of ACL_USER or ACL_GROUP
+ * @param id (r) uid_t uid for ACL_USER, or gid casted to uid_t for ACL_GROUP
+ * @param perm (r) acl_perm_t permissions to add
+ *
+ * @returns 0 on success, -1 on failure
+ */
+static int posix_acl_add_perm(acl_t *aclp, acl_tag_t type, uid_t id, acl_perm_t perm)
+{
+ EC_INIT;
+ uid_t *eid = NULL;
+ acl_entry_t e;
+ acl_tag_t tag;
+ int entry_id = ACL_FIRST_ENTRY;
+ acl_permset_t permset;
+
+ int found = 0;
+ for ( ; (! found) && acl_get_entry(*aclp, entry_id, &e) == 1; entry_id = ACL_NEXT_ENTRY) {
+ EC_ZERO_LOG(acl_get_tag_type(e, &tag));
+ if (tag != ACL_USER && tag != ACL_GROUP)
+ continue;
+ EC_NULL_LOG(eid = (uid_t *)acl_get_qualifier(e));
+ if ((*eid == id) && (type == tag)) {
+ /* found an ACE for this type/id */
+ found = 1;
+ EC_ZERO_LOG(acl_get_permset(e, &permset));
+ EC_ZERO_LOG(acl_add_perm(permset, perm));
+ }
+
+ acl_free(eid);
+ eid = NULL;
+ }
+
+ if ( ! found) {
+ /* there was no existing ACE for this type/id */
+ EC_ZERO_LOG(acl_create_entry(aclp, &e));
+ EC_ZERO_LOG(acl_set_tag_type(e, type));
+ EC_ZERO_LOG(acl_set_qualifier(e, &id));
+ EC_ZERO_LOG(acl_get_permset(e, &permset));
+ EC_ZERO_LOG(acl_clear_perms(permset));
+ EC_ZERO_LOG(acl_add_perm(permset, perm));
+ EC_ZERO_LOG(acl_set_permset(e, permset));
+ }
+
+EC_CLEANUP:
+ if (eid) acl_free(eid);
+
+ EC_EXIT;
+}
+
+/*!
+ * Map Darwin ACL to POSIX ACL.
+ *
+ * aclp must point to a acl_init'ed acl_t or an acl_t that can eg contain default ACEs.
+ * Mapping pecularities:
+ * - we create a default ace (which inherits to files and dirs) if either
+ DARWIN_ACE_FLAGS_FILE_INHERIT or DARWIN_ACE_FLAGS_DIRECTORY_INHERIT is requested
+ * - we throw away DARWIN_ACE_FLAGS_LIMIT_INHERIT (can't be mapped), thus the ACL will
+ * not be limited
+ *
+ * @param darwin_aces (r) pointer to darwin_aces buffer
+ * @param def_aclp (rw) directories: pointer to an initialized acl_t with the default acl
+ * files: *def_aclp will be NULL
+ * @param acc_aclp (rw) pointer to an initialized acl_t with the access acl
+ * @param ace_count (r) number of ACEs in darwin_aces buffer
+ *
+ * @returns 0 on success storing the result in aclp, -1 on error.
+ */
+static int map_aces_darwin_to_posix(const darwin_ace_t *darwin_aces,
+ acl_t *def_aclp,
+ acl_t *acc_aclp,
+ int ace_count)
+{
+ EC_INIT;
+ char *name = NULL;
+ uuidtype_t uuidtype;
+ struct passwd *pwd;
+ struct group *grp;
+ uid_t id;
+ uint32_t darwin_ace_flags, darwin_ace_rights;
+ acl_tag_t tag;
+ acl_perm_t perm;
+
+ for ( ; ace_count != 0; ace_count--, darwin_aces++) {
+ /* type: allow/deny, posix only has allow */
+ darwin_ace_flags = ntohl(darwin_aces->darwin_ace_flags);
+ if ( ! (darwin_ace_flags & DARWIN_ACE_FLAGS_PERMIT))
+ continue;
+
+ darwin_ace_rights = ntohl(darwin_aces->darwin_ace_rights);
+ perm = map_darwin_right_to_posix_permset(darwin_ace_rights, (*def_aclp != NULL));
+ if (perm == 0)
+ continue; /* dont add empty perm */
+
+ LOG(log_debug, logtype_afpd, "map_ace: no: %u, flags: %08x, darwin: %08x, posix: %02x",
+ ace_count, darwin_ace_flags, darwin_ace_rights, perm);
+
+ /* uid/gid */
+ EC_ZERO_LOG(getnamefromuuid(darwin_aces->darwin_ace_uuid, &name, &uuidtype));
+ switch (uuidtype) {
+ case UUID_LOCAL:
+ free(name);
+ name = NULL;
+ continue;
+ case UUID_USER:
+ EC_NULL_LOG(pwd = getpwnam(name));
+ tag = ACL_USER;
+ id = pwd->pw_uid;
+ LOG(log_debug, logtype_afpd, "map_ace: name: %s, uid: %u", name, id);
+ break;
+ case UUID_GROUP:
+ EC_NULL_LOG(grp = getgrnam(name));
+ tag = ACL_GROUP;
+ id = (uid_t)(grp->gr_gid);
+ LOG(log_debug, logtype_afpd, "map_ace: name: %s, gid: %u", name, id);
+ break;
+ }
+ free(name);
+ name = NULL;
+
+ if (darwin_ace_flags & DARWIN_ACE_INHERIT_CONTROL_FLAGS) {
+ if (*def_aclp == NULL) {
+ /* ace request inheritane but we haven't got a default acl pointer */
+ LOG(log_warning, logtype_afpd, "map_acl: unexpected ACE, flags: 0x%04x",
+ darwin_ace_flags);
+ EC_FAIL;
+ }
+ /* add it as default ace */
+ EC_ZERO_LOG(posix_acl_add_perm(def_aclp, tag, id, perm));
+
+
+ if (! (darwin_ace_flags & DARWIN_ACE_FLAGS_ONLY_INHERIT))
+ /* if it not a "inherit only" ace, it must be added as access aces too */
+ EC_ZERO_LOG(posix_acl_add_perm(acc_aclp, tag, id, perm));
+ } else {
+ EC_ZERO_LOG(posix_acl_add_perm(acc_aclp, tag, id, perm));
+ }
+ }
+
+EC_CLEANUP:
+ if (name)
+ free(name);
+
+ EC_EXIT;
+}
+
+/*
+ * Map ACEs from POSIX to Darwin.
+ * type is either POSIX_DEFAULT_2_DARWIN or POSIX_ACCESS_2_DARWIN, cf. acl_get_file.
+ * Return number of mapped ACES, -1 on error.
+ */
+static int map_acl_posix_to_darwin(int type, const acl_t acl, darwin_ace_t *darwin_aces)
+{
+ EC_INIT;
+ int mapped_aces = 0;
+ int entry_id = ACL_FIRST_ENTRY;
+ acl_entry_t e;
+ acl_tag_t tag;
+ uid_t *uid = NULL;
+ gid_t *gid = NULL;
+ struct passwd *pwd = NULL;
+ struct group *grp = NULL;
+ uint32_t flags;
+ uint32_t rights, maskrights = 0;
+ darwin_ace_t *saved_darwin_aces = darwin_aces;
+
+ LOG(log_maxdebug, logtype_afpd, "map_aces_posix_to_darwin(%s)",
+ (type & MAP_MASK) == POSIX_DEFAULT_2_DARWIN ?
+ "POSIX_DEFAULT_2_DARWIN" : "POSIX_ACCESS_2_DARWIN");
+
+ /* itereate through all ACEs */
+ while (acl_get_entry(acl, entry_id, &e) == 1) {
+ entry_id = ACL_NEXT_ENTRY;
+
+ /* get ACE type */
+ EC_ZERO_LOG(acl_get_tag_type(e, &tag));
+
+ /* we return user and group ACE */
+ switch (tag) {
+ case ACL_USER:
+ EC_NULL_LOG(uid = (uid_t *)acl_get_qualifier(e));
+ EC_NULL_LOG(pwd = getpwuid(*uid));
+ LOG(log_debug, logtype_afpd, "map_aces_posix_to_darwin: uid: %d -> name: %s",
+ *uid, pwd->pw_name);
+ EC_ZERO_LOG(getuuidfromname(pwd->pw_name, UUID_USER, darwin_aces->darwin_ace_uuid));
+ acl_free(uid);
+ uid = NULL;
+ break;
+
+ case ACL_GROUP:
+ EC_NULL_LOG(gid = (gid_t *)acl_get_qualifier(e));
+ EC_NULL_LOG(grp = getgrgid(*gid));
+ LOG(log_debug, logtype_afpd, "map_aces_posix_to_darwin: gid: %d -> name: %s",
+ *gid, grp->gr_name);
+ EC_ZERO_LOG(getuuidfromname(grp->gr_name, UUID_GROUP, darwin_aces->darwin_ace_uuid));
+ acl_free(gid);
+ gid = NULL;
+ break;
+
+ case ACL_MASK:
+ maskrights = posix_permset_to_darwin_rights(e, type & IS_DIR);
+ continue;
+
+ default:
+ continue;
+ }
+
+ /* flags */
+ flags = DARWIN_ACE_FLAGS_PERMIT;
+ if ((type & MAP_MASK) == POSIX_DEFAULT_2_DARWIN)
+ flags |= DARWIN_ACE_FLAGS_FILE_INHERIT
+ | DARWIN_ACE_FLAGS_DIRECTORY_INHERIT
+ | DARWIN_ACE_FLAGS_ONLY_INHERIT;
+ darwin_aces->darwin_ace_flags = htonl(flags);
+
+ /* rights */
+ rights = posix_permset_to_darwin_rights(e, type & IS_DIR);
+ darwin_aces->darwin_ace_rights = htonl(rights);
+
+ darwin_aces++;
+ mapped_aces++;
+ } /* while */
+
+ /* 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:
+ if (uid) acl_free(uid);
+ if (gid) acl_free(gid);
+ EC_EXIT;
+}
+#endif
+
+/*
+ * Multiplex ACL mapping (SOLARIS_2_DARWIN, DARWIN_2_SOLARIS, POSIX_2_DARWIN, DARWIN_2_POSIX).
+ * Reads from 'aces' buffer, writes to 'rbuf' buffer.
+ * Caller must provide buffer.
+ * Darwin ACEs are read and written in network byte order.
+ * Needs to know how many ACEs are in the ACL (ace_count) for Solaris ACLs.
+ * Ignores trivial ACEs.
+ * Return no of mapped ACEs or -1 on error.
+ */
+static int map_acl(int type, void *acl, darwin_ace_t *buf, int ace_count)
{
int mapped_aces;
LOG(log_debug9, logtype_afpd, "map_acl: BEGIN");
- switch (type) {
+ switch (type & MAP_MASK) {
+
+#ifdef HAVE_SOLARIS_ACLS
case SOLARIS_2_DARWIN:
- mapped_aces = map_aces_solaris_to_darwin( nfsv4_aces, buf, ace_count);
+ mapped_aces = map_aces_solaris_to_darwin( acl, buf, ace_count);
break;
case DARWIN_2_SOLARIS:
- mapped_aces = map_aces_darwin_to_solaris( buf, nfsv4_aces, ace_count);
+ mapped_aces = map_aces_darwin_to_solaris( buf, acl, ace_count);
break;
+#endif /* HAVE_SOLARIS_ACLS */
+
+#ifdef HAVE_POSIX_ACLS
+ case POSIX_DEFAULT_2_DARWIN:
+ mapped_aces = map_acl_posix_to_darwin(type, (const acl_t)acl, buf);
+ break;
+
+ case POSIX_ACCESS_2_DARWIN:
+ mapped_aces = map_acl_posix_to_darwin(type, (const acl_t)acl, buf);
+ break;
+
+ case DARWIN_2_POSIX_DEFAULT:
+ break;
+
+ case DARWIN_2_POSIX_ACCESS:
+ break;
+#endif /* HAVE_POSIX_ACLS */
default:
mapped_aces = -1;
return mapped_aces;
}
-/********************************************************
- * 1st level funcs
- ********************************************************/
-
-
/* Get ACL from object omitting trivial ACEs. Map to Darwin ACL style and
store Darwin ACL at rbuf. Add length of ACL written to rbuf to *rbuflen.
Returns 0 on success, -1 on error. */
static int get_and_map_acl(char *name, char *rbuf, size_t *rbuflen)
{
- int ace_count, mapped_aces, err;
- ace_t *aces;
+ EC_INIT;
+ int mapped_aces = 0;
+ int dirflag;
uint32_t *darwin_ace_count = (u_int32_t *)rbuf;
-
+#ifdef HAVE_SOLARIS_ACLS
+ int ace_count = 0;
+ ace_t *aces = NULL;
+#endif
+#ifdef HAVE_POSIX_ACLS
+ struct stat st;
+#endif
LOG(log_debug9, logtype_afpd, "get_and_map_acl: BEGIN");
/* Skip length and flags */
*rbuf = 0;
rbuf += 4;
- if ( (ace_count = get_nfsv4_acl(name, &aces)) == -1) {
- LOG(log_error, logtype_afpd, "get_and_map_acl: couldnt get ACL");
- return -1;
+#ifdef HAVE_SOLARIS_ACLS
+ EC_NEG1(ace_count = get_nfsv4_acl(name, &aces));
+ EC_NEG1(mapped_aces = map_acl(SOLARIS_2_DARWIN, aces, (darwin_ace_t *)rbuf, ace_count));
+#endif /* HAVE_SOLARIS_ACLS */
+
+#ifdef HAVE_POSIX_ACLS
+ acl_t defacl = NULL , accacl = NULL;
+
+ /* stat to check if its a dir */
+ EC_ZERO_LOG(lstat(name, &st));
+
+ /* if its a dir, check for default acl too */
+ dirflag = 0;
+ if (S_ISDIR(st.st_mode)) {
+ dirflag = IS_DIR;
+ EC_NULL_LOG(defacl = acl_get_file(name, ACL_TYPE_DEFAULT));
+ EC_NEG1(mapped_aces = map_acl(POSIX_DEFAULT_2_DARWIN | dirflag,
+ defacl,
+ (darwin_ace_t *)rbuf,
+ 0));
}
- if ( (mapped_aces = map_acl(SOLARIS_2_DARWIN, aces, (darwin_ace_t *)rbuf, ace_count)) == -1) {
- err = -1;
- goto cleanup;
- }
+ EC_NULL_LOG(accacl = acl_get_file(name, ACL_TYPE_ACCESS));
+
+ int tmp;
+ EC_NEG1(tmp = map_acl(POSIX_ACCESS_2_DARWIN | dirflag,
+ accacl,
+ (darwin_ace_t *)(rbuf + mapped_aces * sizeof(darwin_ace_t)),
+ 0));
+ mapped_aces += tmp;
+#endif /* HAVE_POSIX_ACLS */
+
LOG(log_debug, logtype_afpd, "get_and_map_acl: mapped %d ACEs", mapped_aces);
- err = 0;
*darwin_ace_count = htonl(mapped_aces);
*rbuflen += sizeof(darwin_acl_header_t) + (mapped_aces * sizeof(darwin_ace_t));
-cleanup:
- free(aces);
+ EC_STATUS(0);
+
+EC_CLEANUP:
+#ifdef HAVE_SOLARIS_ACLS
+ if (aces) free(aces);
+#endif
+#ifdef HAVE_POSIX_ACLS
+ if (defacl) acl_free(defacl);
+ if (accacl) acl_free(accacl);
+#endif /* HAVE_POSIX_ACLS */
LOG(log_debug9, logtype_afpd, "get_and_map_acl: END");
- return err;
+
+ EC_EXIT;
}
/* Removes all non-trivial ACLs from object. Returns full AFPERR code. */
-static int remove_acl_vfs(const struct vol *vol,const char *path, int dir)
+static int remove_acl(const struct vol *vol,const char *path, int dir)
{
- int ret;
+ int ret = AFP_OK;
+#if (defined HAVE_SOLARIS_ACLS || defined HAVE_POSIX_ACLS)
/* Ressource etc. first */
if ((ret = vol->vfs->vfs_remove_acl(vol, path, dir)) != AFP_OK)
return ret;
/* now the data fork or dir */
- return (remove_acl(path));
+ ret = remove_acl_vfs(path);
+#endif
+ return ret;
}
/*
We will store inherited ACEs first, which is Darwins canonical order.
- returns AFPerror code
*/
-static int set_acl_vfs(const struct vol *vol, char *name, int inherit, char *ibuf)
+#ifdef HAVE_SOLARIS_ACLS
+static int set_acl(const struct vol *vol,
+ char *name,
+ int inherit,
+ darwin_ace_t *daces,
+ uint32_t ace_count)
{
- int ret, i, nfsv4_ace_count, tocopy_aces_count = 0, new_aces_count = 0, trivial_ace_count = 0;
+ EC_INIT;
+ int i, nfsv4_ace_count;
+ int tocopy_aces_count = 0, new_aces_count = 0, trivial_ace_count = 0;
ace_t *old_aces, *new_aces = NULL;
uint16_t flags;
- uint32_t ace_count;
LOG(log_debug9, logtype_afpd, "set_acl: BEGIN");
- /* Get no of ACEs the client put on the wire */
- ace_count = htonl(*((uint32_t *)ibuf));
- ibuf += 8; /* skip ACL flags (see acls.h) */
-
if (inherit)
/* inherited + trivial ACEs */
flags = ACE_INHERITED_ACE | ACE_OWNER | ACE_GROUP | ACE_EVERYONE;
}
/* Now malloc buffer exactly sized to fit all new ACEs */
- new_aces = malloc( (ace_count + tocopy_aces_count) * sizeof(ace_t) );
- if (new_aces == NULL) {
+ if ((new_aces = malloc((ace_count + tocopy_aces_count) * sizeof(ace_t))) == NULL) {
LOG(log_error, logtype_afpd, "set_acl: malloc %s", strerror(errno));
- ret = AFPERR_MISC;
- goto cleanup;
+ EC_STATUS(AFPERR_MISC);
+ goto EC_CLEANUP;
}
/* Start building new ACL */
LOG(log_debug7, logtype_afpd, "set_acl: copied %d inherited ACEs", new_aces_count);
/* Now the ACEs from the client */
- ret = map_acl(DARWIN_2_SOLARIS, &new_aces[new_aces_count], (darwin_ace_t *)ibuf, ace_count);
- if (ret == -1) {
- ret = AFPERR_PARAM;
- goto cleanup;
+ if ((ret = (map_acl(DARWIN_2_SOLARIS,
+ &new_aces[new_aces_count],
+ daces,
+ ace_count))) == -1) {
+ 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++) {
/* Ressourcefork first.
Note: for dirs we set the same ACL on the .AppleDouble/.Parent _file_. This
might be strange for ACE_DELETE_CHILD and for inheritance flags. */
- if ( (ret = vol->vfs->vfs_acl(vol, name, ACE_SETACL, new_aces_count, new_aces)) != 0) {
+ if ((ret = (vol->vfs->vfs_acl(vol, name, ACE_SETACL, new_aces_count, new_aces))) != 0) {
LOG(log_error, logtype_afpd, "set_acl: error setting acl: %s", strerror(errno));
if (errno == (EACCES | EPERM))
- ret = AFPERR_ACCESS;
+ EC_STATUS(AFPERR_ACCESS);
else if (errno == ENOENT)
- ret = AFPERR_NOITEM;
+ EC_STATUS(AFPERR_NOITEM);
else
- ret = AFPERR_MISC;
- goto cleanup;
+ EC_STATUS(AFPERR_MISC);
+ goto EC_CLEANUP;
}
- if ( (ret = acl(name, ACE_SETACL, new_aces_count, new_aces)) != 0) {
+ if ((ret = (acl(name, ACE_SETACL, new_aces_count, new_aces))) != 0) {
LOG(log_error, logtype_afpd, "set_acl: error setting acl: %s", strerror(errno));
if (errno == (EACCES | EPERM))
- ret = AFPERR_ACCESS;
+ EC_STATUS(AFPERR_ACCESS);
else if (errno == ENOENT)
- ret = AFPERR_NOITEM;
+ EC_STATUS(AFPERR_NOITEM);
else
- ret = AFPERR_MISC;
- goto cleanup;
+ EC_STATUS(AFPERR_MISC);
+ goto EC_CLEANUP;
}
- ret = AFP_OK;
+ EC_STATUS(AFP_OK);
-cleanup:
- free(old_aces);
- free(new_aces);
+EC_CLEANUP:
+ if (old_aces) free(old_aces);
+ if (new_aces) free(new_aces);
LOG(log_debug9, logtype_afpd, "set_acl: END");
- return ret;
+ EC_EXIT;
}
-
-/*
- 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 !
-*/
-static int check_acl_access(const char *path, const uuidp_t uuid, uint32_t requested_darwin_rights)
+#endif /* HAVE_SOLARIS_ACLS */
+
+#ifdef HAVE_POSIX_ACLS
+static int set_acl(const struct vol *vol,
+ const char *name,
+ int inherit _U_,
+ darwin_ace_t *daces,
+ uint32_t ace_count)
{
- 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;
- }
+ EC_INIT;
+ acl_t def_acl = NULL;
+ acl_t acc_acl = 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, "set_acl: BEGIN");
- 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;
+ struct stat st;
+ EC_ZERO_LOG_ERR(lstat(name, &st), AFPERR_NOOBJ);
- /* 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;
- }
+ /* seed default ACL with access ACL */
+ if (S_ISDIR(st.st_mode))
+ EC_NULL_LOG_ERR(def_acl = acl_get_file(name, ACL_TYPE_ACCESS), AFPERR_MISC);
- /* 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
- }
+ /* for files def_acl will be NULL */
- /* 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;
- }
+ /* create access acl from mode */
+ EC_NULL_LOG_ERR(acc_acl = acl_from_mode(st.st_mode), AFPERR_MISC);
- /* 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;
+ /* adds the clients aces */
+ EC_ZERO_ERR(map_aces_darwin_to_posix(daces, &def_acl, &acc_acl, ace_count), AFPERR_MISC);
+
+ /* calcuate ACL mask */
+ EC_ZERO_LOG_ERR(acl_calc_mask(&acc_acl), AFPERR_MISC);
+
+ /* is it ok? */
+ EC_ZERO_LOG_ERR(acl_valid(acc_acl), AFPERR_MISC);
+
+ /* set it */
+ EC_ZERO_LOG_ERR(acl_set_file(name, ACL_TYPE_ACCESS, acc_acl), AFPERR_MISC);
+ EC_ZERO_LOG_ERR(vol->vfs->vfs_acl(vol, name, ACL_TYPE_ACCESS, 0, acc_acl), AFPERR_MISC);
+
+ if (def_acl) {
+ EC_ZERO_LOG_ERR(acl_set_file(name, ACL_TYPE_DEFAULT, def_acl), AFPERR_MISC);
+ EC_ZERO_LOG_ERR(vol->vfs->vfs_acl(vol, name, ACL_TYPE_DEFAULT, 0, def_acl), AFPERR_MISC);
}
- /* 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;
+EC_CLEANUP:
+ acl_free(acc_acl);
+ acl_free(def_acl);
- if (flags & ACE_INHERIT_ONLY_ACE)
- continue;
+ LOG(log_maxdebug, logtype_afpd, "set_acl: END");
+ EC_EXIT;
+}
+#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 !
+ *
+ * @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
+*/
+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;
+ uint32_t allowed_rights = 0;
+ char *username = NULL;
+ uuidtype_t uuidtype;
+ struct stat st;
+ bstring parent = NULL;
- /* 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;
- }
+ LOG(log_maxdebug, logtype_afpd, "check_access: Request: 0x%08x", requested_rights);
- /* 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);
+ /* 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);
+
+ 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;
+
+ case UUID_LOCAL:
+ LOG(log_warning, logtype_afpd, "check_access: local UUID");
+ EC_STATUS(AFPERR_MISC);
+ goto EC_CLEANUP;
+ }
+
+#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
+
+ LOG(log_debug, logtype_afpd, "allowed rights: 0x%08x", allowed_rights);
+
+ /*
+ * 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;
+
+ 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);
+EC_CLEANUP:
+ if (username) free(username);
+ if (parent) bdestroy(parent);
-exit:
- free(aces);
- free(username);
-#ifdef DEBUG
- LOG(log_debug9, logtype_afpd, "check_access: END");
-#endif
- return ret;
+ EC_EXIT;
}
/********************************************************
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");
/* Change owner: dont even try */
if (bitmap & kFileSec_UUID) {
- LOG(log_debug, logtype_afpd, "afp_setacl: change owner request. discarded.");
+ LOG(log_note, logtype_afpd, "afp_setacl: change owner request, discarded");
ret = AFPERR_ACCESS;
ibuf += UUID_BINSIZE;
}
/* Change group: certain changes might be allowed, so try it. FIXME: not implemented yet. */
if (bitmap & kFileSec_UUID) {
- LOG(log_debug, logtype_afpd, "afp_setacl: change group request. not supported this time.");
+ LOG(log_note, logtype_afpd, "afp_setacl: change group request, not supported");
ret = AFPERR_PARAM;
ibuf += UUID_BINSIZE;
}
/* Remove ACL ? */
if (bitmap & kFileSec_REMOVEACL) {
LOG(log_debug, logtype_afpd, "afp_setacl: Remove ACL request.");
- if ((ret = remove_acl_vfs(vol, s_path->u_name, S_ISDIR(s_path->st.st_mode))) != AFP_OK)
+ if ((ret = remove_acl(vol, s_path->u_name, S_ISDIR(s_path->st.st_mode))) != AFP_OK)
LOG(log_error, logtype_afpd, "afp_setacl: error from remove_acl");
}
/* Change ACL ? */
if (bitmap & kFileSec_ACL) {
LOG(log_debug, logtype_afpd, "afp_setacl: Change ACL request.");
-
- /* Check if its our job to preserve inherited ACEs */
- if (bitmap & kFileSec_Inherit)
- ret = set_acl_vfs(vol, s_path->u_name, 1, ibuf);
- else
- ret = set_acl_vfs(vol, s_path->u_name, 0, ibuf);
+ /* Get no of ACEs the client put on the wire */
+ uint32_t ace_count;
+ memcpy(&ace_count, ibuf, sizeof(uint32_t));
+ ace_count = htonl(ace_count);
+ ibuf += 8; /* skip ACL flags (see acls.h) */
+
+ ret = set_acl(vol,
+ s_path->u_name,
+ (bitmap & kFileSec_Inherit),
+ (darwin_ace_t *)ibuf,
+ ace_count);
if (ret == 0)
ret = AFP_OK;
else {
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)
+/********************************************************************
+ * ACL funcs interfacing with other parts
+ ********************************************************************/
+
+/*!
+ * 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)
{
- struct passwd *pw;
- uuid_t uuid;
- int dir, r_ok, w_ok, x_ok;
-
- if ( ! (AFPobj->options.flags & OPTION_UUID))
- return;
+ 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 ?
-*/
-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");
+ int ret = 1;
- /* 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));
-
-
- }
+#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
-cleanup:
- LOG(log_debug9, logtype_afpd, "addir_inherit_acl: END");
+#ifdef HAVE_SOLARIS_ACLS
+ if (aces) free(aces);
+#endif
+#ifdef HAVE_POSIX_ACLS
+ if (acl) acl_free(acl);
+#endif /* HAVE_POSIX_ACLS */
- free(diraces);
- free(adaces);
- free(combinedaces);
+ LOG(log_debug, logtype_afpd, "Volume \"%s\" ACL support: %s",
+ vol->v_path, ret ? "yes" : "no");
+ return ret;
}
projects / netatalk.git / blobdiff