use strict;
use warnings;
+use JSON;
+use MIME::Base64;
+
+use PVE::Exception qw(raise raise_perm_exc);
use PVE::SafeSyslog;
use PVE::RPCEnvironment;
use PVE::Cluster qw(cfs_read_file);
+use PVE::Corosync;
use PVE::RESTHandler;
use PVE::AccessControl;
use PVE::JSONSchema qw(get_standard_option);
use PVE::API2::Role;
use PVE::API2::ACL;
+my $u2f_available = 0;
+eval {
+ require PVE::U2F;
+ $u2f_available = 1;
+};
+
use base qw(PVE::RESTHandler);
__PACKAGE__->register_method ({
path => '',
method => 'GET',
description => "Directory index.",
+ permissions => {
+ user => 'all',
+ },
parameters => {
additionalProperties => 0,
properties => {},
}
push @$res, { subdir => 'ticket' };
+ push @$res, { subdir => 'password' };
return $res;
}});
+
+my $verify_auth = sub {
+ my ($rpcenv, $username, $pw_or_ticket, $otp, $path, $privs) = @_;
+
+ my $normpath = PVE::AccessControl::normalize_path($path);
+
+ my $ticketuser;
+ if (($ticketuser = PVE::AccessControl::verify_ticket($pw_or_ticket, 1)) &&
+ ($ticketuser eq $username)) {
+ # valid ticket
+ } elsif (PVE::AccessControl::verify_vnc_ticket($pw_or_ticket, $username, $normpath, 1)) {
+ # valid vnc ticket
+ } else {
+ $username = PVE::AccessControl::authenticate_user($username, $pw_or_ticket, $otp);
+ }
+
+ my $privlist = [ PVE::Tools::split_list($privs) ];
+ if (!($normpath && scalar(@$privlist) && $rpcenv->check($username, $normpath, $privlist))) {
+ die "no permission ($path, $privs)\n";
+ }
+
+ return { username => $username };
+};
+
+my $create_ticket = sub {
+ my ($rpcenv, $username, $pw_or_ticket, $otp) = @_;
+
+ my $ticketuser;
+ if (($ticketuser = PVE::AccessControl::verify_ticket($pw_or_ticket, 1)) &&
+ ($ticketuser eq 'root@pam' || $ticketuser eq $username)) {
+ # valid ticket. Note: root@pam can create tickets for other users
+ } else {
+ $username = PVE::AccessControl::authenticate_user($username, $pw_or_ticket, $otp);
+ }
+
+ my $ticket = PVE::AccessControl::assemble_ticket($username);
+ my $csrftoken = PVE::AccessControl::assemble_csrf_prevention_token($username);
+
+ return {
+ ticket => $ticket,
+ username => $username,
+ CSRFPreventionToken => $csrftoken,
+ };
+};
+
+my $compute_api_permission = sub {
+ my ($rpcenv, $authuser) = @_;
+
+ my $usercfg = $rpcenv->{user_cfg};
+
+ my $res = {};
+ my $priv_re_map = {
+ vms => qr/VM\.|Permissions\.Modify/,
+ access => qr/(User|Group)\.|Permissions\.Modify/,
+ storage => qr/Datastore\.|Permissions\.Modify/,
+ nodes => qr/Sys\.|Permissions\.Modify/,
+ dc => qr/Sys\.Audit/,
+ };
+ map { $res->{$_} = {} } keys %$priv_re_map;
+
+ my $required_paths = ['/', '/nodes', '/access/groups', '/vms', '/storage'];
+
+ my $checked_paths = {};
+ foreach my $path (@$required_paths, keys %{$usercfg->{acl}}) {
+ next if $checked_paths->{$path};
+ $checked_paths->{$path} = 1;
+
+ my $path_perm = $rpcenv->permissions($authuser, $path);
+
+ my $toplevel = ($path =~ /^\/(\w+)/) ? $1 : 'dc';
+ if ($toplevel eq 'pool') {
+ foreach my $priv (keys %$path_perm) {
+ if ($priv =~ m/^VM\./) {
+ $res->{vms}->{$priv} = 1;
+ } elsif ($priv =~ m/^Datastore\./) {
+ $res->{storage}->{$priv} = 1;
+ } elsif ($priv eq 'Permissions.Modify') {
+ $res->{storage}->{$priv} = 1;
+ $res->{vms}->{$priv} = 1;
+ }
+ }
+ } else {
+ my $priv_regex = $priv_re_map->{$toplevel} // next;
+ foreach my $priv (keys %$path_perm) {
+ next if $priv !~ m/^($priv_regex)/;
+ $res->{$toplevel}->{$priv} = 1;
+ }
+ }
+ }
+
+ return $res;
+};
+
+__PACKAGE__->register_method ({
+ name => 'get_ticket',
+ path => 'ticket',
+ method => 'GET',
+ permissions => { user => 'world' },
+ description => "Dummy. Useful for formatters which want to provide a login page.",
+ parameters => {
+ additionalProperties => 0,
+ },
+ returns => { type => "null" },
+ code => sub { return undef; }});
+
__PACKAGE__->register_method ({
name => 'create_ticket',
path => 'ticket',
method => 'POST',
- permissions => { user => 'world' },
+ permissions => {
+ description => "You need to pass valid credientials.",
+ user => 'world'
+ },
protected => 1, # else we can't access shadow files
- description => "Create authentication ticket.",
+ description => "Create or verify authentication ticket.",
parameters => {
additionalProperties => 0,
properties => {
username => {
- description => "User name",
- type => 'string',
- maxLength => 64,
+ description => "User name",
+ type => 'string',
+ maxLength => 64,
+ completion => \&PVE::AccessControl::complete_username,
},
realm => get_standard_option('realm', {
description => "You can optionally pass the realm using this parameter. Normally the realm is simply added to the username <username>\@<relam>.",
- optional => 1}),
+ optional => 1,
+ completion => \&PVE::AccessControl::complete_realm,
+ }),
password => {
description => "The secret password. This can also be a valid ticket.",
type => 'string',
},
+ otp => {
+ description => "One-time password for Two-factor authentication.",
+ type => 'string',
+ optional => 1,
+ },
path => {
- description => "Only create ticket if user have access 'privs' on 'path'",
+ description => "Verify ticket, and check if user have access 'privs' on 'path'",
type => 'string',
requires => 'privs',
optional => 1,
maxLength => 64,
},
privs => {
- description => "Only create ticket if user have access 'privs' on 'path'",
+ description => "Verify ticket, and check if user have access 'privs' on 'path'",
type => 'string' , format => 'pve-priv-list',
requires => 'path',
optional => 1,
returns => {
type => "object",
properties => {
- ticket => { type => 'string' },
username => { type => 'string' },
- CSRFPreventionToken => { type => 'string' },
+ ticket => { type => 'string', optional => 1},
+ CSRFPreventionToken => { type => 'string', optional => 1 },
+ clustername => { type => 'string', optional => 1 },
}
},
code => sub {
$username .= "\@$param->{realm}" if $param->{realm};
my $rpcenv = PVE::RPCEnvironment::get();
- my $clientip = $rpcenv->get_client_ip() || '';
- my $ticket;
- my $token;
+ my $res;
eval {
-
# test if user exists and is enabled
$rpcenv->check_user_enabled($username);
if ($param->{path} && $param->{privs}) {
- my $privs = [ PVE::Tools::split_list($param->{privs}) ];
- my $path = PVE::AccessControl::normalize_path($param->{path});
- if (!($path && scalar(@$privs) && $rpcenv->check($username, $path, $privs))) {
- die "no permission ($param->{path}, $param->{privs})\n";
- }
- }
-
- my $tmp;
- if (($tmp = PVE::AccessControl::verify_ticket($param->{password}, 1)) &&
- ($tmp eq 'root@pam' || $tmp eq $username)) {
- # got valid ticket
- # Note: root@pam can create tickets for other users
-
+ $res = &$verify_auth($rpcenv, $username, $param->{password}, $param->{otp},
+ $param->{path}, $param->{privs});
} else {
- $username = PVE::AccessControl::authenticate_user($username, $param->{password});
+ $res = &$create_ticket($rpcenv, $username, $param->{password}, $param->{otp});
}
- $ticket = PVE::AccessControl::assemble_ticket($username);
- $token = PVE::AccessControl::assemble_csrf_prevention_token($username);
};
if (my $err = $@) {
+ my $clientip = $rpcenv->get_client_ip() || '';
syslog('err', "authentication failure; rhost=$clientip user=$username msg=$err");
- die $err;
+ # do not return any info to prevent user enumeration attacks
+ die PVE::Exception->new("authentication failure\n", code => 401);
+ }
+
+ $res->{cap} = &$compute_api_permission($rpcenv, $username);
+
+ if (PVE::Corosync::check_conf_exists(1)) {
+ if ($rpcenv->check($username, '/', ['Sys.Audit'], 1)) {
+ eval {
+ my $conf = cfs_read_file('corosync.conf');
+ my $totem = PVE::Corosync::totem_config($conf);
+ if ($totem->{cluster_name}) {
+ $res->{clustername} = $totem->{cluster_name};
+ }
+ };
+ warn "$@\n" if $@;
+ }
}
PVE::Cluster::log_msg('info', 'root@pam', "successful auth for user '$username'");
- return {
- ticket => $ticket,
- username => $username,
- CSRFPreventionToken => $token,
+ return $res;
+ }});
+
+__PACKAGE__->register_method ({
+ name => 'change_password',
+ path => 'password',
+ method => 'PUT',
+ permissions => {
+ description => "Each user is allowed to change his own password. A user can change the password of another user if he has 'Realm.AllocateUser' (on the realm of user <userid>) and 'User.Modify' permission on /access/groups/<group> on a group where user <userid> is member of.",
+ check => [ 'or',
+ ['userid-param', 'self'],
+ [ 'and',
+ [ 'userid-param', 'Realm.AllocateUser'],
+ [ 'userid-group', ['User.Modify']]
+ ]
+ ],
+ },
+ protected => 1, # else we can't access shadow files
+ description => "Change user password.",
+ parameters => {
+ additionalProperties => 0,
+ properties => {
+ userid => get_standard_option('userid-completed'),
+ password => {
+ description => "The new password.",
+ type => 'string',
+ minLength => 5,
+ maxLength => 64,
+ },
+ }
+ },
+ returns => { type => "null" },
+ code => sub {
+ my ($param) = @_;
+
+ my $rpcenv = PVE::RPCEnvironment::get();
+ my $authuser = $rpcenv->get_user();
+
+ my ($userid, $ruid, $realm) = PVE::AccessControl::verify_username($param->{userid});
+
+ $rpcenv->check_user_exist($userid);
+
+ if ($authuser eq 'root@pam') {
+ # OK - root can change anything
+ } else {
+ if ($authuser eq $userid) {
+ $rpcenv->check_user_enabled($userid);
+ # OK - each user can change its own password
+ } else {
+ # only root may change root password
+ raise_perm_exc() if $userid eq 'root@pam';
+ # do not allow to change system user passwords
+ raise_perm_exc() if $realm eq 'pam';
+ }
+ }
+
+ PVE::AccessControl::domain_set_password($realm, $ruid, $param->{password});
+
+ PVE::Cluster::log_msg('info', 'root@pam', "changed password for user '$userid'");
+
+ return undef;
+ }});
+
+sub get_u2f_config() {
+ die "u2f support not available\n" if !$u2f_available;
+
+ my $dc = cfs_read_file('datacenter.cfg');
+ my $u2f = $dc->{u2f};
+ die "u2f not configured in datacenter.cfg\n" if !$u2f;
+ $u2f = PVE::JSONSchema::parse_property_string($PVE::Cluster::u2f_format, $u2f);
+ return $u2f;
+}
+
+sub get_u2f_instance {
+ my ($rpcenv, $publicKey, $keyHandle) = @_;
+
+ # We store the public key base64 encoded (as the api provides it in binary)
+ $publicKey = decode_base64($publicKey) if defined($publicKey);
+
+ my $u2fconfig = get_u2f_config();
+ my $u2f = PVE::U2F->new();
+
+ # via the 'Host' header (in case a node has multiple hosts available).
+ my $origin = $u2fconfig->{origin};
+ if (!defined($origin)) {
+ $origin = $rpcenv->get_request_host(1);
+ if ($origin) {
+ $origin = "https://$origin";
+ } else {
+ die "failed to figure out u2f origin\n";
+ }
+ }
+
+ my $appid = $u2fconfig->{appid} // $origin;
+ $u2f->set_appid($appid);
+ $u2f->set_origin($origin);
+ $u2f->set_publicKey($publicKey) if defined($publicKey);
+ $u2f->set_keyHandle($keyHandle) if defined($keyHandle);
+ return $u2f;
+}
+
+__PACKAGE__->register_method ({
+ name => 'change_tfa',
+ path => 'tfa',
+ method => 'PUT',
+ permissions => {
+ description => 'A user can change their own u2f token.',
+ check => [ 'or',
+ ['userid-param', 'self'],
+ [ 'and',
+ [ 'userid-param', 'Realm.AllocateUser'],
+ [ 'userid-group', ['User.Modify']]
+ ]
+ ],
+ },
+ protected => 1, # else we can't access shadow files
+ description => "Change user u2f authentication.",
+ parameters => {
+ additionalProperties => 0,
+ properties => {
+ userid => get_standard_option('userid', {
+ completion => \&PVE::AccessControl::complete_username,
+ }),
+ password => {
+ optional => 1, # Only required if not root@pam
+ description => "The current password.",
+ type => 'string',
+ minLength => 5,
+ maxLength => 64,
+ },
+ action => {
+ description => 'The action to perform',
+ type => 'string',
+ enum => [qw(delete new confirm)],
+ },
+ response => {
+ optional => 1,
+ description => 'The response to the current registration challenge.',
+ type => 'string',
+ },
+ }
+ },
+ returns => { type => 'object' },
+ code => sub {
+ my ($param) = @_;
+
+ my $rpcenv = PVE::RPCEnvironment::get();
+ my $authuser = $rpcenv->get_user();
+
+ my $action = delete $param->{action};
+ my $response = delete $param->{response};
+ my $password = delete($param->{password}) // '';
+
+ my ($userid, $ruid, $realm) = PVE::AccessControl::verify_username($param->{userid});
+ $rpcenv->check_user_exist($userid);
+
+ # Only root may modify root
+ raise_perm_exc() if $userid eq 'root@pam' && $authuser ne 'root@pam';
+
+ # Regular users need to confirm their password to change u2f settings.
+ if ($authuser ne 'root@pam') {
+ raise_param_exc('password' => 'password is required to modify u2f data')
+ if !defined($password);
+ my $domain_cfg = cfs_read_file('domains.cfg');
+ my $cfg = $domain_cfg->{ids}->{$realm};
+ die "auth domain '$realm' does not exists\n" if !$cfg;
+ my $plugin = PVE::Auth::Plugin->lookup($cfg->{type});
+ $plugin->authenticate_user($cfg, $realm, $ruid, $password);
+ }
+
+ if ($action eq 'delete') {
+ PVE::AccessControl::user_set_tfa($userid, $realm, undef, undef);
+ PVE::Cluster::log_msg('info', $authuser, "deleted u2f data for user '$userid'");
+ } elsif ($action eq 'new') {
+ my $u2f = get_u2f_instance($rpcenv);
+ my $challenge = $u2f->registration_challenge()
+ or raise("failed to get u2f challenge");
+ $challenge = decode_json($challenge);
+ PVE::AccessControl::user_set_tfa($userid, $realm, 'u2f', $challenge);
+ return $challenge;
+ } elsif ($action eq 'confirm') {
+ raise_param_exc('response' => "confirm action requires the 'response' parameter to be set")
+ if !defined($response);
+
+ my ($type, $u2fdata) = PVE::AccessControl::user_get_tfa($userid, $realm);
+ raise("no u2f data available")
+ if (!defined($type) || $type ne 'u2f');
+
+ my $challenge = $u2fdata->{challenge}
+ or raise("no active challenge");
+
+ my $u2f = get_u2f_instance($rpcenv);
+ $u2f->set_challenge($challenge);
+ my ($keyHandle, $publicKey) = $u2f->registration_verify($response);
+ PVE::AccessControl::user_set_tfa($userid, $realm, 'u2f', {
+ keyHandle => $keyHandle,
+ publicKey => encode_base64($publicKey, ''),
+ });
+ } else {
+ die "invalid action: $action\n";
+ }
+
+ return {};
+ }});
+
+__PACKAGE__->register_method({
+ name => 'verify_tfa',
+ path => 'tfa',
+ method => 'POST',
+ permissions => { user => 'all' },
+ protected => 1, # else we can't access shadow files
+ description => 'Finish a u2f challenge.',
+ parameters => {
+ additionalProperties => 0,
+ properties => {
+ response => {
+ type => 'string',
+ description => 'The response to the current authentication challenge.',
+ },
+ }
+ },
+ returns => {
+ type => 'object',
+ properties => {
+ ticket => { type => 'string' },
+ # cap
+ }
+ },
+ code => sub {
+ my ($param) = @_;
+
+ my $rpcenv = PVE::RPCEnvironment::get();
+ my $challenge = $rpcenv->get_u2f_challenge()
+ or raise('no active challenge');
+ my $authuser = $rpcenv->get_user();
+ my ($username, undef, $realm) = PVE::AccessControl::verify_username($authuser);
+
+ my ($tfa_type, $u2fdata) = PVE::AccessControl::user_get_tfa($username, $realm);
+ if (!defined($tfa_type) || $tfa_type ne 'u2f') {
+ raise('no u2f data available');
+ }
+
+ my $keyHandle = $u2fdata->{keyHandle};
+ my $publicKey = $u2fdata->{publicKey};
+ raise("incomplete u2f setup")
+ if !defined($keyHandle) || !defined($publicKey);
+
+ my $u2f = get_u2f_instance($rpcenv, $publicKey, $keyHandle);
+ $u2f->set_challenge($challenge);
+
+ eval {
+ my ($counter, $present) = $u2f->auth_verify($param->{response});
+ # Do we want to do anything with these?
};
+ if (my $err = $@) {
+ my $clientip = $rpcenv->get_client_ip() || '';
+ syslog('err', "authentication verification failure; rhost=$clientip user=$authuser msg=$err");
+ die PVE::Exception->new("authentication failure\n", code => 401);
+ }
+
+ # create a new ticket for the user:
+ my $ticket_data = "u2f!$authuser!verified";
+ return {
+ ticket => PVE::AccessControl::assemble_ticket($ticket_data),
+ cap => &$compute_api_permission($rpcenv, $authuser),
+ }
}});
1;