X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=etc%2Fafpd%2Facls.c;h=43e91042f10e0ee3850a2d3cc312b7b51ee7a038;hb=4054f4b3c85ecab060dafd46c0d3632cadbb5803;hp=4c2dcfafadc6d1aa988f642bb7052084ac362d1a;hpb=796536aafea5c330d04623242615e661f0b95ccc;p=netatalk.git diff --git a/etc/afpd/acls.c b/etc/afpd/acls.c index 4c2dcfaf..43e91042 100644 --- a/etc/afpd/acls.c +++ b/etc/afpd/acls.c @@ -1,5 +1,5 @@ /* - Copyright (c) 2008,2009 Frank Lahm + Copyright (c) 2008, 2009, 2010 Frank Lahm 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 @@ -23,8 +23,15 @@ #include #include #include +#ifdef HAVE_SOLARIS_ACLS #include +#endif +#ifdef HAVE_POSIX_ACLS +#include +#include +#endif +#include #include #include #include @@ -33,211 +40,172 @@ #include #include #include +#include +#include #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; - } - i++; - } - - return -1; -} - -/* - Remove any trivial ACE "in-place". Returns no of non-trivial ACEs -*/ -static int strip_trivial_aces(ace_t **saces, int sacecount) -{ - int i,j; - int nontrivaces = 0; - ace_t *aces = *saces; - ace_t *new_aces; - - /* Count non-trivial ACEs */ - for (i=0; i < sacecount; ) { - if ( ! (aces[i].a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE))) - nontrivaces++; - i++; - } - /* malloc buffer for new ACL */ - if ((new_aces = malloc(nontrivaces * sizeof(ace_t))) == NULL) { - LOG(log_error, logtype_afpd, "strip_trivial_aces: malloc %s", strerror(errno)); - return -1; - } - - /* Copy non-trivial ACEs */ - for (i=0, j=0; i < sacecount; ) { - if ( ! (aces[i].a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE))) { - memcpy(&new_aces[j], &aces[i], sizeof(ace_t)); - j++; - } - i++; - } - - free(aces); - *saces = new_aces; - - LOG(log_debug7, logtype_afpd, "strip_trivial_aces: non-trivial ACEs: %d", nontrivaces); - - return nontrivaces; -} + 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; -/* - Remove non-trivial ACEs "in-place". Returns no of trivial ACEs. -*/ -static int strip_nontrivial_aces(ace_t **saces, int sacecount) -{ - int i,j; - int trivaces = 0; - ace_t *aces = *saces; - ace_t *new_aces; - - /* Count trivial ACEs */ - for (i=0; i < sacecount; ) { - if ((aces[i].a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE))) - trivaces++; - i++; - } - /* malloc buffer for new ACL */ - if ((new_aces = malloc(trivaces * sizeof(ace_t))) == NULL) { - LOG(log_error, logtype_afpd, "strip_nontrivial_aces: malloc %s", strerror(errno)); - return -1; - } + if (flags & ACE_INHERIT_ONLY_ACE) + continue; - /* Copy trivial ACEs */ - for (i=0, j=0; i < sacecount; ) { - if ((aces[i].a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE))) { - memcpy(&new_aces[j], &aces[i], sizeof(ace_t)); - j++; + /* 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) && !(uuid == sb->st_uid) && gmem(sb->st_gid)) + || + (flags & ACE_EVERYONE && !(uuid == sb->st_uid) && !gmem(sb->st_gid)) + ) { + /* 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++; - } - /* Free old ACEs */ - free(aces); - *saces = new_aces; + } while (++i < ace_count); - LOG(log_debug7, logtype_afpd, "strip_nontrivial_aces: trivial ACEs: %d", trivaces); - return trivaces; -} + /* 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; -/* - Concatenate ACEs -*/ -static ace_t *concat_aces(ace_t *aces1, int ace1count, ace_t *aces2, int ace2count) -{ - ace_t *new_aces; - int i, j; + /* Remove denied from allowed rights */ + allowed_rights &= ~denied_rights; - /* malloc buffer for new ACL */ - if ((new_aces = malloc((ace1count + ace2count) * sizeof(ace_t))) == NULL) { - LOG(log_error, logtype_afpd, "combine_aces: malloc %s", strerror(errno)); - return NULL; + /* 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; } - /* Copy ACEs from buf1 */ - for (i=0; i < ace1count; ) { - memcpy(&new_aces[i], &aces1[i], sizeof(ace_t)); - i++; - } + *result |= darwin_rights; - j = i; +EC_CLEANUP: + if (aces) free(aces); - /* Copy ACEs from buf2 */ - for (i=0; i < ace2count; ) { - memcpy(&new_aces[j], &aces2[i], sizeof(ace_t)); - i++; - j++; - } - return new_aces; + EC_EXIT; } - /* 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; 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 */ @@ -269,6 +237,8 @@ static int map_aces_solaris_to_darwin(ace_t *aces, darwin_ace_t *darwin_aces, in } return count; +EC_CLEANUP: + EC_EXIT; } /* @@ -276,14 +246,17 @@ static int map_aces_solaris_to_darwin(ace_t *aces, darwin_ace_t *darwin_aces, in 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; @@ -293,25 +266,22 @@ int map_aces_darwin_to_solaris(darwin_ace_t *darwin_aces, ace_t *nfsv4_aces, int 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; @@ -351,33 +321,490 @@ int map_aces_darwin_to_solaris(darwin_ace_t *darwin_aces, ace_t *nfsv4_aces, int } 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 (!(sb->st_uid == uuid) && 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: + if (!(sb->st_uid == uuid) && !gmem(sb->st_gid)) { + 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; break; @@ -387,20 +814,22 @@ static int map_acl(int type, ace_t *nfsv4_aces, darwin_ace_t *buf, int ace_count 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 */ @@ -408,38 +837,72 @@ static int get_and_map_acl(char *name, char *rbuf, size_t *rbuflen) *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; } /* @@ -450,19 +913,21 @@ static int remove_acl_vfs(const struct vol *vol,const char *path, int dir) 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; @@ -479,11 +944,10 @@ static int set_acl_vfs(const struct vol *vol, char *name, int inherit, char *ibu } /* 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 */ @@ -501,13 +965,15 @@ static int set_acl_vfs(const struct vol *vol, char *name, int inherit, char *ibu 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++) { @@ -522,203 +988,197 @@ static int set_acl_vfs(const struct vol *vol, char *name, int inherit, char *ibu /* 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; } /******************************************************** @@ -735,8 +1195,6 @@ int afp_access(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size struct path *s_path; uuidp_t uuid; - LOG(log_debug9, logtype_afpd, "afp_access: BEGIN"); - *rbuflen = 0; ibuf += 2; @@ -778,9 +1236,8 @@ int afp_access(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size 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; } @@ -838,11 +1295,14 @@ int afp_getacl(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size /* Shall we return owner UUID ? */ if (bitmap & kFileSec_UUID) { LOG(log_debug, logtype_afpd, "afp_getacl: client requested files owner user UUID"); - if (NULL == (pw = getpwuid(s_path->st.st_uid))) - return AFPERR_MISC; - LOG(log_debug, logtype_afpd, "afp_getacl: got uid: %d, name: %s", s_path->st.st_uid, pw->pw_name); - if ((ret = getuuidfromname(pw->pw_name, UUID_USER, rbuf)) != 0) - return AFPERR_MISC; + if (NULL == (pw = getpwuid(s_path->st.st_uid))) { + LOG(log_debug, logtype_afpd, "afp_getacl: local uid: %u", s_path->st.st_uid); + localuuid_from_id(rbuf, UUID_USER, s_path->st.st_uid); + } else { + LOG(log_debug, logtype_afpd, "afp_getacl: got uid: %d, name: %s", s_path->st.st_uid, pw->pw_name); + if ((ret = getuuidfromname(pw->pw_name, UUID_USER, rbuf)) != 0) + return AFPERR_MISC; + } rbuf += UUID_BINSIZE; *rbuflen += UUID_BINSIZE; } @@ -850,11 +1310,14 @@ int afp_getacl(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size /* Shall we return group UUID ? */ if (bitmap & kFileSec_GRPUUID) { LOG(log_debug, logtype_afpd, "afp_getacl: client requested files owner group UUID"); - if (NULL == (gr = getgrgid(s_path->st.st_gid))) - return AFPERR_MISC; - LOG(log_debug, logtype_afpd, "afp_getacl: got gid: %d, name: %s", s_path->st.st_gid, gr->gr_name); - if ((ret = getuuidfromname(gr->gr_name, UUID_GROUP, rbuf)) != 0) - return AFPERR_MISC; + if (NULL == (gr = getgrgid(s_path->st.st_gid))) { + LOG(log_debug, logtype_afpd, "afp_getacl: local gid: %u", s_path->st.st_gid); + localuuid_from_id(rbuf, UUID_GROUP, s_path->st.st_gid); + } else { + LOG(log_debug, logtype_afpd, "afp_getacl: got gid: %d, name: %s", s_path->st.st_gid, gr->gr_name); + if ((ret = getuuidfromname(gr->gr_name, UUID_GROUP, rbuf)) != 0) + return AFPERR_MISC; + } rbuf += UUID_BINSIZE; *rbuflen += UUID_BINSIZE; } @@ -862,7 +1325,11 @@ int afp_getacl(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size /* 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"); @@ -921,14 +1388,14 @@ int afp_setacl(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size /* 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; } @@ -936,19 +1403,24 @@ int afp_setacl(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size /* 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 { @@ -962,115 +1434,81 @@ int afp_setacl(AFPObj *obj, char *ibuf, size_t ibuflen _U_, char *rbuf _U_, size 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"); - - /* 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" - */ + int ret = 1; - 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; }