package PVE::AccessControl; use strict; use Encode; use Crypt::OpenSSL::Random; use Crypt::OpenSSL::RSA; use MIME::Base64; use Digest::SHA; use Authen::PAM qw(:constants); use Net::LDAP; use PVE::Tools qw(run_command lock_file file_get_contents split_list safe_print); use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_write_file cfs_lock_file); use PVE::JSONSchema; use Encode; use Data::Dumper; # fixme: remove # $authdir must be writable by root only! my $confdir = "/etc/pve"; my $authdir = "$confdir/priv"; my $authprivkeyfn = "$authdir/authkey.key"; my $authpubkeyfn = "$confdir/authkey.pub"; my $shadowconfigfile = "priv/shadow.cfg"; my $domainconfigfile = "domains.cfg"; my $pve_www_key_fn = "$confdir/pve-www.key"; my $ticket_lifetime = 3600*2; # 2 hours Crypt::OpenSSL::RSA->import_random_seed(); cfs_register_file('user.cfg', \&parse_user_config, \&write_user_config); cfs_register_file($shadowconfigfile, \&parse_shadow_passwd, \&write_shadow_config); cfs_register_file($domainconfigfile, \&parse_domains, \&write_domains); sub lock_user_config { my ($code, $errmsg) = @_; cfs_lock_file("user.cfg", undef, $code); my $err = $@; if ($err) { $errmsg ? die "$errmsg: $err" : die $err; } } sub lock_domain_config { my ($code, $errmsg) = @_; cfs_lock_file($domainconfigfile, undef, $code); my $err = $@; if ($err) { $errmsg ? die "$errmsg: $err" : die $err; } } sub lock_shadow_config { my ($code, $errmsg) = @_; cfs_lock_file($shadowconfigfile, undef, $code); my $err = $@; if ($err) { $errmsg ? die "$errmsg: $err" : die $err; } } my $pve_auth_pub_key; sub get_pubkey { return $pve_auth_pub_key if $pve_auth_pub_key; my $input = PVE::Tools::file_get_contents($authpubkeyfn); $pve_auth_pub_key = Crypt::OpenSSL::RSA->new_public_key($input); return $pve_auth_pub_key; } my $csrf_prevention_secret; my $get_csrfr_secret = sub { if (!$csrf_prevention_secret) { my $input = PVE::Tools::file_get_contents($pve_www_key_fn); $csrf_prevention_secret = Digest::SHA::sha1_base64($input); } return $csrf_prevention_secret; }; sub assemble_csrf_prevention_token { my ($username) = @_; my $timestamp = sprintf("%08X", time()); my $digest = Digest::SHA::sha1_base64("$timestamp:$username", &$get_csrfr_secret()); return "$timestamp:$digest"; } sub verify_csrf_prevention_token { my ($username, $token, $noerr) = @_; if ($token =~ m/^([A-Z0-9]{8}):(\S+)$/) { my $sig = $2; my $timestamp = $1; my $ttime = hex($timestamp); my $digest = Digest::SHA::sha1_base64("$timestamp:$username", &$get_csrfr_secret()); my $age = time() - $ttime; return if ($digest eq $sig) && ($age > -300) && ($age < $ticket_lifetime); } die "Permission denied - invalid csrf token\n" if !$noerr; return undef; } my $pve_auth_priv_key; sub get_privkey { return $pve_auth_priv_key if $pve_auth_priv_key; my $input = PVE::Tools::file_get_contents($authprivkeyfn); $pve_auth_priv_key = Crypt::OpenSSL::RSA->new_private_key($input); return $pve_auth_priv_key; } sub assemble_ticket { my ($username) = @_; my $rsa_priv = get_privkey(); my $timestamp = sprintf("%08X", time()); my $plain = "PVE:$username:$timestamp"; my $ticket = $plain . "::" . encode_base64($rsa_priv->sign($plain), ''); return $ticket; } sub verify_ticket { my ($ticket, $noerr) = @_; if ($ticket && $ticket =~ m/^(\S+)::([^:\s]+)$/) { my $plain = $1; my $sig = $2; my $rsa_pub = get_pubkey(); if ($rsa_pub->verify($plain, decode_base64($sig))) { if ($plain =~ m/^PVE:(([A-Za-z0-9\.\-_]+)(\@([A-Za-z0-9\.\-_]+))?):([A-Z0-9]{8})$/) { my $username = $1; my $timestamp = $5; my $ttime = hex($timestamp); my $age = time() - $ttime; if (($age > -300) && ($age < $ticket_lifetime)) { return wantarray ? ($username, $age) : $username; } } } } die "permission denied - invalid ticket\n" if !$noerr; return undef; } sub authenticate_user_shadow { my ($userid, $password) = @_; die "no password\n" if !$password; my $shadow_cfg = cfs_read_file($shadowconfigfile); if ($shadow_cfg->{users}->{$userid}) { my $encpw = crypt($password, $shadow_cfg->{users}->{$userid}->{shadow}); die "invalid credentials\n" if ($encpw ne $shadow_cfg->{users}->{$userid}->{shadow}); } else { die "no password set\n"; } } sub authenticate_user_pam { my ($userid, $password) = @_; # user (www-data) need to be able to read /etc/passwd /etc/shadow die "no password\n" if !$password; my $pamh = new Authen::PAM ('common-auth', $userid, sub { my @res; while(@_) { my $msg_type = shift; my $msg = shift; push @res, (0, $password); } push @res, 0; return @res; }); if (!ref ($pamh)) { my $err = $pamh->pam_strerror($pamh); die "error during PAM init: $err"; } my $res; if (($res = $pamh->pam_authenticate(0)) != PAM_SUCCESS) { my $err = $pamh->pam_strerror($res); die "$err\n"; } if (($res = $pamh->pam_acct_mgmt (0)) != PAM_SUCCESS) { my $err = $pamh->pam_strerror($res); die "$err\n"; } $pamh = 0; # call destructor } sub authenticate_user_ad { my ($entry, $server, $userid, $password) = @_; my $default_port = $entry->{secure} ? 636: 389; my $port = $entry->{port} ? $entry->{port} : $default_port; my $scheme = $entry->{secure} ? 'ldaps' : 'ldap'; my $conn_string = "$scheme://${server}:$port"; my $ldap = Net::LDAP->new($server) || die "$@\n"; $userid = "$userid\@$entry->{domain}" if $userid !~ m/@/ && $entry->{domain}; my $res = $ldap->bind($userid, password => $password); my $code = $res->code(); my $err = $res->error; $ldap->unbind(); die "$err\n" if ($code); } sub authenticate_user_ldap { my ($entry, $server, $userid, $password) = @_; my $default_port = $entry->{secure} ? 636: 389; my $port = $entry->{port} ? $entry->{port} : $default_port; my $scheme = $entry->{secure} ? 'ldaps' : 'ldap'; my $conn_string = "$scheme://${server}:$port"; my $ldap = Net::LDAP->new($conn_string, verify => 'none') || die "$@\n"; my $search = $entry->{user_attr} . "=" . $userid; my $result = $ldap->search( base => "$entry->{base_dn}", scope => "sub", filter => "$search", attrs => ['dn'] ); die "no entries returned\n" if !$result->entries; my @entries = $result->entries; my $res = $ldap->bind($entries[0]->dn, password => $password); my $code = $res->code(); my $err = $res->error; $ldap->unbind(); die "$err\n" if ($code); } sub authenticate_user_domain { my ($realm, $userid, $password) = @_; my $domain_cfg = cfs_read_file($domainconfigfile); die "no auth domain specified" if !$realm; if ($realm eq 'pam') { authenticate_user_pam($userid, $password); return; } eval { if ($realm eq 'pve') { authenticate_user_shadow($userid, $password); } else { my $cfg = $domain_cfg->{$realm}; die "auth domain '$realm' does not exists\n" if !$cfg; if ($cfg->{type} eq 'ad') { eval { authenticate_user_ad($cfg, $cfg->{server1}, $userid, $password); }; my $err = $@; return if !$err; die $err if !$cfg->{server2}; authenticate_user_ad($cfg, $cfg->{server2}, $userid, $password); } elsif ($cfg->{type} eq 'ldap') { eval { authenticate_user_ldap($cfg, $cfg->{server1}, $userid, $password); }; my $err = $@; return if !$err; die $err if !$cfg->{server2}; authenticate_user_ldap($cfg, $cfg->{server2}, $userid, $password); } else { die "unknown auth type '$cfg->{type}'\n"; } } }; if (my $err = $@) { sleep(2); # timeout after failed auth die $err; } } sub user_enabled { my ($usercfg, $username) = @_; $username = verify_username($username, 1); return undef if !$username; return 1 if $usercfg && $usercfg->{users}->{$username} && $usercfg->{users}->{$username}->{enable}; return 1 if $username eq 'root@pam'; # root is always enabled return 0; } # password should be utf8 encoded sub authenticate_user { my ($username, $password) = @_; die "no username specified\n" if !$username; my ($userid, $realm); ($username, $userid, $realm) = verify_username($username); my $usercfg = cfs_read_file('user.cfg'); if (!user_enabled($usercfg, $username)) { sleep(2); die "no such user ('$username')\n"; } my $ctime = time(); my $expire = $usercfg->{users}->{$username}->{expire}; if ($expire && ($expire < $ctime)) { sleep(2); die "account expired\n" } authenticate_user_domain($realm, $userid, $password); return $username; } sub delete_shadow_password { my ($userid) = @_; lock_shadow_config(sub { my $shadow_cfg = cfs_read_file($shadowconfigfile); delete ($shadow_cfg->{users}->{$userid}) if $shadow_cfg->{users}->{$userid}; cfs_write_file($shadowconfigfile, $shadow_cfg); }); } sub store_shadow_password { my ($userid, $password) = @_; lock_shadow_config(sub { my $shadow_cfg = cfs_read_file($shadowconfigfile); $shadow_cfg->{users}->{$userid}->{shadow} = encrypt_pw($password); cfs_write_file($shadowconfigfile, $shadow_cfg); }); } sub encrypt_pw { my ($pw) = @_; my $time = substr (Digest::SHA::sha1_base64 (time), 0, 8); return crypt (encode("utf8", $pw), "\$5\$$time\$"); } sub store_pam_password { my ($userid, $password) = @_; my $cmd = ['/usr/sbin/usermod']; my $epw = encrypt_pw($password); push @$cmd, '-p', $epw; push @$cmd, $userid; run_command($cmd); } sub domain_set_password { my ($realm, $userid, $password) = @_; die "no auth domain specified" if !$realm; if ($realm eq 'pam') { store_pam_password($userid, $password); } elsif ($realm eq 'pve') { store_shadow_password($userid, $password); } else { die "can't set password on auth domain '$realm'\n"; } } sub add_user_group { my ($username, $usercfg, $group) = @_; $usercfg->{users}->{$username}->{groups}->{$group} = 1; $usercfg->{groups}->{$group}->{users}->{$username} = 1; } sub delete_user_group { my ($username, $usercfg) = @_; foreach my $group (keys %{$usercfg->{groups}}) { delete ($usercfg->{groups}->{$group}->{users}->{$username}) if $usercfg->{groups}->{$group}->{users}->{$username}; } } sub delete_user_acl { my ($username, $usercfg) = @_; foreach my $acl (keys %{$usercfg->{acl}}) { delete ($usercfg->{acl}->{$acl}->{users}->{$username}) if $usercfg->{acl}->{$acl}->{users}->{$username}; } } sub delete_group_acl { my ($group, $usercfg) = @_; foreach my $acl (keys %{$usercfg->{acl}}) { delete ($usercfg->{acl}->{$acl}->{groups}->{$group}) if $usercfg->{acl}->{$acl}->{groups}->{$group}; } } # we automatically create some predefined roles by splitting privs # into 3 groups (per category) # root: only root is allowed to do that # admin: an administrator can to that # user: a normak user/customer can to that my $privgroups = { VM => { root => [], admin => [ 'VM.Modify', 'VM.Allocate', 'VM.Migrate', 'Permissions.Modify', ], user => [ 'VM.Console', 'VM.PowerMgmt', ], audit => [ 'VM.Audit' ], }, Sys => { root => [ 'Sys.PowerMgmt', 'Sys.Modify', # edit/change node settings ], admin => [ 'Sys.Console', 'Sys.Syslog', ], user => [], audit => [ 'Sys.Audit', ], }, Datastore => { root => [ 'Datastore.Allocate', 'Permissions.Modify', ], admin => [], user => [ 'Datastore.AllocateSpace', ], audit => [ 'Datastore.Audit', ], }, }; my $valid_privs = {}; my $special_roles = { 'NoAccess' => {}, # no priviledges 'Administrator' => $valid_privs, # all priviledges }; sub create_roles { foreach my $cat (keys %$privgroups) { my $cd = $privgroups->{$cat}; foreach my $p (@{$cd->{root}}, @{$cd->{admin}}, @{$cd->{user}}, @{$cd->{audit}}) { $valid_privs->{$p} = 1; } foreach my $p (@{$cd->{admin}}, @{$cd->{user}}, @{$cd->{audit}}) { $special_roles->{"PVE${cat}Admin"}->{$p} = 1; $special_roles->{"PVEAdmin"}->{$p} = 1; } if (scalar(@{$cd->{user}})) { foreach my $p (@{$cd->{user}}, @{$cd->{audit}}) { $special_roles->{"PVE${cat}User"}->{$p} = 1; } } foreach my $p (@{$cd->{audit}}) { $special_roles->{"PVEAuditor"}->{$p} = 1; } } }; create_roles(); my $valid_attributes = { ad => { server1 => '[\w\d]+(.[\w\d]+)*', server2 => '[\w\d]+(.[\w\d]+)*', domain => '\S+', port => '\d+', secure => '', comment => '.*', }, ldap => { server1 => '[\w\d]+(.[\w\d]+)*', server2 => '[\w\d]+(.[\w\d]+)*', base_dn => '\w+=[\w\s]+(,\s*\w+=[\w\s]+)*', user_attr => '\S{2,}', secure => '', port => '\d+', comment => '.*', } }; sub add_role_privs { my ($role, $usercfg, $privs) = @_; return if !$privs; die "role '$role' does not exist\n" if !$usercfg->{roles}->{$role}; foreach my $priv (split_list($privs)) { if (defined ($valid_privs->{$priv})) { $usercfg->{roles}->{$role}->{$priv} = 1; } else { die "invalid priviledge '$priv'\n"; } } } sub normalize_path { my $path = shift; $path =~ s|/+|/|; $path =~ s|/$||; $path = '/' if !$path; return undef if $path !~ m|^[[:alnum:]\-\_\/]+$|; return $path; } my $realm_regex = qr/[A-Za-z][A-Za-z0-9\.\-_]+/; sub pve_verify_realm { my ($realm, $noerr) = @_; if ($realm !~ m/^${realm_regex}$/) { return undef if $noerr; die "value does not look like a valid realm\n"; } return $realm; } PVE::JSONSchema::register_format('pve-userid', \&verify_username); sub verify_username { my ($username, $noerr) = @_; $username = '' if !$username; my $len = length($username); if ($len < 3) { die "user name '$username' is too short\n" if !$noerr; return undef; } if ($len > 64) { die "user name '$username' is too long ($len > 64)\n" if !$noerr; return undef; } # we only allow a limited set of characters (colon is not allowed, # because we store usernames in colon separated lists)! if ($username =~ m/^([^\s:]+)\@(${realm_regex})$/) { return wantarray ? ($username, $1, $2) : $username; } die "value '$username' does not look like a valid user name\n" if !$noerr; return undef; } PVE::JSONSchema::register_standard_option('userid', { description => "User ID", type => 'string', format => 'pve-userid', maxLength => 64, }); PVE::JSONSchema::register_standard_option('realm', { description => "Authentication domain ID", type => 'string', format => 'pve-configid', maxLength => 32, }); PVE::JSONSchema::register_format('pve-groupid', \&verify_groupname); sub verify_groupname { my ($groupname, $noerr) = @_; if ($groupname !~ m/^[A-Za-z0-9\.\-_]+$/) { die "group name '$groupname' contains invalid characters\n" if !$noerr; return undef; } return $groupname; } PVE::JSONSchema::register_format('pve-roleid', \&verify_rolename); sub verify_rolename { my ($rolename, $noerr) = @_; if ($rolename !~ m/^[A-Za-z0-9\.\-_]+$/) { die "role name '$rolename' contains invalid characters\n" if !$noerr; return undef; } return $rolename; } PVE::JSONSchema::register_format('pve-priv', \&verify_privname); sub verify_privname { my ($priv, $noerr) = @_; if (!$valid_privs->{$priv}) { die "invalid priviledge '$priv'\n" if !$noerr; return undef; } return $priv; } sub userconfig_force_defaults { my ($cfg) = @_; foreach my $r (keys %$special_roles) { $cfg->{roles}->{$r} = $special_roles->{$r}; } # fixme: remove 'root' group (not required)? # add root user $cfg->{users}->{'root@pam'}->{enable} = 1; } sub parse_user_config { my ($filename, $raw) = @_; my $cfg = {}; userconfig_force_defaults($cfg); while ($raw && $raw =~ s/^(.*?)(\n|$)//) { my $line = $1; next if $line =~ m/^\s*$/; # skip empty lines my @data; foreach my $d (split (/:/, $line)) { $d =~ s/^\s+//; $d =~ s/\s+$//; push @data, $d } my $et = shift @data; if ($et eq 'user') { my ($user, $enable, $expire, $firstname, $lastname, $email, $comment) = @data; my (undef, undef, $realm) = verify_username($user, 1); if (!$realm) { warn "user config - ignore user '$user' - invalid user name\n"; next; } $enable = $enable ? 1 : 0; $expire = 0 if !$expire; if ($expire !~ m/^\d+$/) { warn "user config - ignore user '$user' - (illegal characters in expire '$expire')\n"; next; } $expire = int($expire); #if (!verify_groupname ($group, 1)) { # warn "user config - ignore user '$user' - invalid characters in group name\n"; # next; #} $cfg->{users}->{$user} = { enable => $enable, # group => $group, }; $cfg->{users}->{$user}->{firstname} = PVE::Tools::decode_text($firstname) if $firstname; $cfg->{users}->{$user}->{lastname} = PVE::Tools::decode_text($lastname) if $lastname; $cfg->{users}->{$user}->{email} = $email; $cfg->{users}->{$user}->{comment} = PVE::Tools::decode_text($comment) if $comment; $cfg->{users}->{$user}->{expire} = $expire; #$cfg->{users}->{$user}->{groups}->{$group} = 1; #$cfg->{groups}->{$group}->{$user} = 1; } elsif ($et eq 'group') { my ($group, $userlist, $comment) = @data; if (!verify_groupname($group, 1)) { warn "user config - ignore group '$group' - invalid characters in group name\n"; next; } # make sure to add the group (even if there are no members) $cfg->{groups}->{$group} = { users => {} } if !$cfg->{groups}->{$group}; $cfg->{groups}->{$group}->{comment} = PVE::Tools::decode_text($comment) if $comment; foreach my $user (split_list($userlist)) { if (!verify_username($user, 1)) { warn "user config - ignore invalid group member '$user'\n"; next; } if ($cfg->{users}->{$user}) { # user exists $cfg->{users}->{$user}->{groups}->{$group} = 1; $cfg->{groups}->{$group}->{users}->{$user} = 1; } else { warn "user config - ignore invalid group member '$user'\n"; } } } elsif ($et eq 'role') { my ($role, $privlist) = @data; if (!verify_rolename($role, 1)) { warn "user config - ignore role '$role' - invalid characters in role name\n"; next; } # make sure to add the role (even if there are no privileges) $cfg->{roles}->{$role} = {} if !$cfg->{roles}->{$role}; foreach my $priv (split_list($privlist)) { if (defined ($valid_privs->{$priv})) { $cfg->{roles}->{$role}->{$priv} = 1; } else { warn "user config - ignore invalid priviledge '$priv'\n"; } } } elsif ($et eq 'acl') { my ($propagate, $pathtxt, $uglist, $rolelist) = @data; if (my $path = normalize_path($pathtxt)) { foreach my $role (split_list($rolelist)) { if (!verify_rolename($role, 1)) { warn "user config - ignore invalid role name '$role' in acl\n"; next; } foreach my $ug (split_list($uglist)) { if ($ug =~ m/^@(\w+)$/) { my $group = $1; if ($cfg->{groups}->{$group}) { # group exists $cfg->{acl}->{$path}->{groups}->{$group}->{$role} = $propagate; } else { warn "user config - ignore invalid acl group '$group'\n"; } } elsif (verify_username($ug, 1)) { if ($cfg->{users}->{$ug}) { # user exists $cfg->{acl}->{$path}->{users}->{$ug}->{$role} = $propagate; } else { warn "user config - ignore invalid acl member '$ug'\n"; } } else { warn "user config - invalid user/group '$ug' in acl\n"; } } } } else { warn "user config - ignore invalid path in acl '$pathtxt'\n"; } } else { warn "user config - ignore config line: $line\n"; } } userconfig_force_defaults($cfg); return $cfg; } sub parse_shadow_passwd { my ($filename, $raw) = @_; my $shadow = {}; while ($raw && $raw =~ s/^(.*?)(\n|$)//) { my $line = $1; next if $line =~ m/^\s*$/; # skip empty lines if ($line !~ m/^\S+:\S+:$/) { warn "pve shadow password: ignore invalid line $.\n"; next; } my ($userid, $crypt_pass) = split (/:/, $line); $shadow->{users}->{$userid}->{shadow} = $crypt_pass; } return $shadow; } sub write_domains { my ($filename, $cfg) = @_; my $data = ''; my $wrote_default; foreach my $realm (sort keys %$cfg) { my $entry = $cfg->{$realm}; my $type = lc($entry->{type}); next if !$type; next if ($type eq 'pam') || ($type eq 'pve'); my $formats = $valid_attributes->{$type}; next if !$formats; $data .= "$type: $realm\n"; foreach my $k (sort keys %$entry) { next if $k eq 'type'; my $v = $entry->{$k}; if ($k eq 'default') { $data .= "\t$k\n" if $v && !$wrote_default; $wrote_default = 1; } elsif (defined($formats->{$k})) { if (!$formats->{$k}) { $data .= "\t$k\n" if $v; } elsif ($v =~ m/^$formats->{$k}$/) { $v = PVE::Tools::encode_text($v) if $k eq 'comment'; $data .= "\t$k $v\n"; } else { die "invalid value '$v' for attribute '$k'\n"; } } else { die "invalid attribute '$k' - not supported\n"; } } $data .= "\n"; } return $data; } sub parse_domains { my ($filename, $raw) = @_; my $cfg = {}; my $default; while ($raw && $raw =~ s/^(.*?)(\n|$)//) { my $line = $1; next if $line =~ m/^\#/; # skip comment lines next if $line =~ m/^\s*$/; # skip empty lines if ($line =~ m/^(\S+):\s*(\S+)\s*$/) { my $realm = $2; my $type = lc($1); my $ignore = 0; my $entry; my $formats = $valid_attributes->{$type}; if (!$formats) { $ignore = 1; warn "ignoring domain '$realm' - (unsupported authentication type '$type')\n"; } elsif (!pve_verify_realm($realm, 1)) { $ignore = 1; warn "ignoring domain '$realm' - (illegal characters)\n"; } else { $entry = { type => $type }; } while ($raw && $raw =~ s/^(.*?)(\n|$)//) { $line = $1; next if $line =~ m/^\#/; #skip comment lines last if $line =~ m/^\s*$/; next if $ignore; # skip if ($line =~ m/^\s+(default)\s*$/) { $default = $realm if !$default; } elsif ($line =~ m/^\s+(\S+)(\s+(.*\S))?\s*$/) { my ($k, $v) = (lc($1), $3); if (defined($formats->{$k})) { if (!$formats->{$k} && !defined($v)) { $entry->{$k} = 1; } elsif ($formats->{$k} && $v =~ m/^$formats->{$k}$/) { if (!defined($entry->{$k})) { $v = PVE::Tools::decode_text($v) if $k eq 'comment'; $entry->{$k} = $v; } else { warn "ignoring duplicate attribute '$k $v'\n"; } } else { warn "ignoring value '$v' for attribute '$k' - invalid format\n"; } } else { warn "ignoring attribute '$k' - not supported\n"; } } else { warn "ignore config line: $line\n"; } } if ($entry->{server2} && !$entry->{server1}) { $entry->{server1} = $entry->{server2}; delete $entry->{server2}; } if ($ignore) { # do nothing } elsif (!$entry->{server1}) { warn "ignoring domain '$realm' - missing server attribute\n"; } elsif (($entry->{type} eq "ldap") && !$entry->{user_attr}) { warn "ignoring domain '$realm' - missing user attribute\n"; } elsif (($entry->{type} eq "ldap") && !$entry->{base_dn}) { warn "ignoring domain '$realm' - missing base_dn attribute\n"; } elsif (($entry->{type} eq "ad") && !$entry->{domain}) { warn "ignoring domain '$realm' - missing domain attribute\n"; } else { $cfg->{$realm} = $entry; } } else { warn "ignore config line: $line\n"; } } $cfg->{$default}->{default} = 1 if $default; # add default domains $cfg->{pve} = { type => 'builtin', comment => "Proxmox VE authentication server", }; $cfg->{pam} = { type => 'builtin', comment => "Linux PAM standard authentication", }; return $cfg; } sub write_shadow_config { my ($filename, $cfg) = @_; my $data = ''; foreach my $userid (keys %{$cfg->{users}}) { my $crypt_pass = $cfg->{users}->{$userid}->{shadow}; $data .= "$userid:$crypt_pass:\n"; } return $data } sub write_user_config { my ($filename, $cfg) = @_; my $data = ''; foreach my $user (keys %{$cfg->{users}}) { next if $user eq 'root@pam'; my $d = $cfg->{users}->{$user}; my $firstname = $d->{firstname} ? PVE::Tools::encode_text($d->{firstname}) : ''; my $lastname = $d->{lastname} ? PVE::Tools::encode_text($d->{lastname}) : ''; my $email = $d->{email} || ''; my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : ''; my $expire = int($d->{expire} || 0); my $enable = $d->{enable} ? 1 : 0; $data .= "user:$user:$enable:$expire:$firstname:$lastname:$email:$comment:\n"; } $data .= "\n"; foreach my $group (keys %{$cfg->{groups}}) { my $d = $cfg->{groups}->{$group}; my $list = join (',', keys %{$d->{users}}); my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : ''; $data .= "group:$group:$list:$comment:\n"; } $data .= "\n"; foreach my $role (keys %{$cfg->{roles}}) { next if $special_roles->{$role}; my $d = $cfg->{roles}->{$role}; my $list = join (',', keys %$d); $data .= "role:$role:$list:\n"; } $data .= "\n"; foreach my $path (sort keys %{$cfg->{acl}}) { my $d = $cfg->{acl}->{$path}; my $ra = {}; foreach my $group (keys %{$d->{groups}}) { my $l0 = ''; my $l1 = ''; foreach my $role (sort keys %{$d->{groups}->{$group}}) { my $propagate = $d->{groups}->{$group}->{$role}; if ($propagate) { $l1 .= ',' if $l1; $l1 .= $role; } else { $l0 .= ',' if $l0; $l0 .= $role; } } $ra->{0}->{$l0}->{"\@$group"} = 1 if $l0; $ra->{1}->{$l1}->{"\@$group"} = 1 if $l1; } foreach my $user (keys %{$d->{users}}) { # no need to save, because root is always 'Administartor' next if $user eq 'root@pam'; my $l0 = ''; my $l1 = ''; foreach my $role (sort keys %{$d->{users}->{$user}}) { my $propagate = $d->{users}->{$user}->{$role}; if ($propagate) { $l1 .= ',' if $l1; $l1 .= $role; } else { $l0 .= ',' if $l0; $l0 .= $role; } } $ra->{0}->{$l0}->{$user} = 1 if $l0; $ra->{1}->{$l1}->{$user} = 1 if $l1; } foreach my $rolelist (sort keys %{$ra->{0}}) { my $uglist = join (',', keys %{$ra->{0}->{$rolelist}}); $data .= "acl:0:$path:$uglist:$rolelist:\n"; } foreach my $rolelist (sort keys %{$ra->{1}}) { my $uglist = join (',', keys %{$ra->{1}->{$rolelist}}); $data .= "acl:1:$path:$uglist:$rolelist:\n"; } } return $data; } sub roles { my ($cfg, $user, $path) = @_; return 'Administrator' if $user eq 'root@pam'; # root can do anything my $perm = {}; foreach my $p (sort keys %{$cfg->{acl}}) { my $final = ($path eq $p); next if !(($p eq '/') || $final || ($path =~ m|^$p/|)); my $acl = $cfg->{acl}->{$p}; #print "CHECKACL $path $p\n"; #print "ACL $path = " . Dumper ($acl); if (my $ri = $acl->{users}->{$user}) { my $new; foreach my $role (keys %$ri) { my $propagate = $ri->{$role}; if ($final || $propagate) { #print "APPLY ROLE $p $user $role\n"; $new = {} if !$new; $new->{$role} = 1; } } if ($new) { $perm = $new; # overwrite previous settings next; # user privs always override group privs } } my $new; foreach my $g (keys %{$acl->{groups}}) { next if !$cfg->{groups}->{$g}->{users}->{$user}; if (my $ri = $acl->{groups}->{$g}) { foreach my $role (keys %$ri) { my $propagate = $ri->{$role}; if ($final || $propagate) { #print "APPLY ROLE $p \@$g $role\n"; $new = {} if !$new; $new->{$role} = 1; } } } } if ($new) { $perm = $new; # overwrite previous settings next; } #die "what herea?"; } my $res = {}; if (!defined ($perm->{NoAccess})) { $res = $perm; } #print "permission $user $path = " . Dumper ($perm); my @ra = keys %$res; #print "roles $user $path = " . join (',', @ra) . "\n"; return @ra; } sub permission { my ($cfg, $user, $path) = @_; $user = verify_username($user, 1); return {} if !$user; my @ra = roles($cfg, $user, $path); my $privs = {}; foreach my $role (@ra) { if (my $privset = $cfg->{roles}->{$role}) { foreach my $p (keys %$privset) { $privs->{$p} = 1; } } } #print "priviledges $user $path = " . Dumper ($privs); return $privs; } sub check_permissions { my ($username, $path, $privlist) = @_; $path = normalize_path($path); my $usercfg = cfs_read_file('user.cfg'); my $perm = permission($usercfg, $username, $path); foreach my $priv (split_list($privlist)) { return undef if !$perm->{$priv}; }; return 1; } 1;