+++ /dev/null
-package PVE::API2::AccessControl;
-
-use strict;
-use warnings;
-
-use JSON;
-use MIME::Base64;
-
-use PVE::Exception qw(raise raise_perm_exc raise_param_exc);
-use PVE::SafeSyslog;
-use PVE::RPCEnvironment;
-use PVE::Cluster qw(cfs_read_file);
-use PVE::DataCenterConfig;
-use PVE::RESTHandler;
-use PVE::AccessControl;
-use PVE::JSONSchema qw(get_standard_option);
-use PVE::API2::Domains;
-use PVE::API2::User;
-use PVE::API2::Group;
-use PVE::API2::Role;
-use PVE::API2::ACL;
-use PVE::Auth::Plugin;
-use PVE::OTP;
-use PVE::Tools;
-
-my $u2f_available = 0;
-eval {
- require PVE::U2F;
- $u2f_available = 1;
-};
-
-use base qw(PVE::RESTHandler);
-
-__PACKAGE__->register_method ({
- subclass => "PVE::API2::User",
- path => 'users',
-});
-
-__PACKAGE__->register_method ({
- subclass => "PVE::API2::Group",
- path => 'groups',
-});
-
-__PACKAGE__->register_method ({
- subclass => "PVE::API2::Role",
- path => 'roles',
-});
-
-__PACKAGE__->register_method ({
- subclass => "PVE::API2::ACL",
- path => 'acl',
-});
-
-__PACKAGE__->register_method ({
- subclass => "PVE::API2::Domains",
- path => 'domains',
-});
-
-__PACKAGE__->register_method ({
- name => 'index',
- path => '',
- method => 'GET',
- description => "Directory index.",
- permissions => {
- user => 'all',
- },
- parameters => {
- additionalProperties => 0,
- properties => {},
- },
- returns => {
- type => 'array',
- items => {
- type => "object",
- properties => {
- subdir => { type => 'string' },
- },
- },
- links => [ { rel => 'child', href => "{subdir}" } ],
- },
- code => sub {
- my ($param) = @_;
-
- my $res = [];
-
- my $ma = __PACKAGE__->method_attributes();
-
- foreach my $info (@$ma) {
- next if !$info->{subclass};
-
- my $subpath = $info->{match_re}->[0];
-
- push @$res, { subdir => $subpath };
- }
-
- push @$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, undef, $tfa_info) = PVE::AccessControl::verify_ticket($pw_or_ticket, 1);
- if (defined($ticketuser) && ($ticketuser eq 'root@pam' || $ticketuser eq $username)) {
- if (defined($tfa_info)) {
- die "incomplete ticket\n";
- }
- # valid ticket. Note: root@pam can create tickets for other users
- } else {
- ($username, $tfa_info) = PVE::AccessControl::authenticate_user($username, $pw_or_ticket, $otp);
- }
-
- my %extra;
- my $ticket_data = $username;
- if (defined($tfa_info)) {
- $extra{NeedTFA} = 1;
- if ($tfa_info->{type} eq 'u2f') {
- my $u2finfo = $tfa_info->{data};
- my $u2f = get_u2f_instance($rpcenv, $u2finfo->@{qw(publicKey keyHandle)});
- my $challenge = $u2f->auth_challenge()
- or die "failed to get u2f challenge\n";
- $challenge = decode_json($challenge);
- $extra{U2FChallenge} = $challenge;
- $ticket_data = "u2f!$username!$challenge->{challenge}";
- } else {
- # General half-login / 'missing 2nd factor' ticket:
- $ticket_data = "tfa!$username";
- }
- }
-
- my $ticket = PVE::AccessControl::assemble_ticket($ticket_data);
- my $csrftoken = PVE::AccessControl::assemble_csrf_prevention_token($username);
-
- return {
- ticket => $ticket,
- username => $username,
- CSRFPreventionToken => $csrftoken,
- %extra,
- };
-};
-
-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/,
- sdn => qr/SDN\.|Permissions\.Modify/,
- dc => qr/Sys\.Audit|SDN\./,
- };
- map { $res->{$_} = {} } keys %$priv_re_map;
-
- my $required_paths = ['/', '/nodes', '/access/groups', '/vms', '/storage', '/sdn'];
-
- 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 => {
- description => "You need to pass valid credientials.",
- user => 'world'
- },
- protected => 1, # else we can't access shadow files
- allowtoken => 0, # we don't want tokens to create tickets
- description => "Create or verify authentication ticket.",
- parameters => {
- additionalProperties => 0,
- properties => {
- username => {
- 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,
- 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 => "Verify ticket, and check if user have access 'privs' on 'path'",
- type => 'string',
- requires => 'privs',
- optional => 1,
- maxLength => 64,
- },
- privs => {
- description => "Verify ticket, and check if user have access 'privs' on 'path'",
- type => 'string' , format => 'pve-priv-list',
- requires => 'path',
- optional => 1,
- maxLength => 64,
- },
- }
- },
- returns => {
- type => "object",
- properties => {
- username => { type => 'string' },
- ticket => { type => 'string', optional => 1},
- CSRFPreventionToken => { type => 'string', optional => 1 },
- clustername => { type => 'string', optional => 1 },
- # cap => computed api permissions, unless there's a u2f challenge
- }
- },
- code => sub {
- my ($param) = @_;
-
- my $username = $param->{username};
- $username .= "\@$param->{realm}" if $param->{realm};
-
- $username = PVE::AccessControl::lookup_username($username);
- my $rpcenv = PVE::RPCEnvironment::get();
-
- my $res;
- eval {
- # test if user exists and is enabled
- $rpcenv->check_user_enabled($username);
-
- if ($param->{path} && $param->{privs}) {
- $res = &$verify_auth($rpcenv, $username, $param->{password}, $param->{otp},
- $param->{path}, $param->{privs});
- } else {
- $res = &$create_ticket($rpcenv, $username, $param->{password}, $param->{otp});
- }
- };
- if (my $err = $@) {
- my $clientip = $rpcenv->get_client_ip() || '';
- syslog('err', "authentication failure; rhost=$clientip user=$username msg=$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, $username)
- if !defined($res->{NeedTFA});
-
- my $clinfo = PVE::Cluster::get_clinfo();
- if ($clinfo->{cluster}->{name} && $rpcenv->check($username, '/', ['Sys.Audit'], 1)) {
- $res->{clustername} = $clinfo->{cluster}->{name};
- }
-
- PVE::Cluster::log_msg('info', 'root@pam', "successful auth for user '$username'");
-
- return $res;
- }});
-
-__PACKAGE__->register_method ({
- name => 'change_password',
- path => 'password',
- method => 'PUT',
- permissions => {
- description => "Each user is allowed to change his own password. A user can change the password of another user if he has 'Realm.AllocateUser' (on the realm of user <userid>) and 'User.Modify' permission on /access/groups/<group> on a group where user <userid> is member of.",
- check => [ 'or',
- ['userid-param', 'self'],
- [ 'and',
- [ 'userid-param', 'Realm.AllocateUser'],
- [ 'userid-group', ['User.Modify']]
- ]
- ],
- },
- protected => 1, # else we can't access shadow files
- allowtoken => 0, # we don't want tokens to change the regular user password
- description => "Change user password.",
- parameters => {
- additionalProperties => 0,
- properties => {
- userid => get_standard_option('userid-completed'),
- password => {
- description => "The new password.",
- type => 'string',
- minLength => 5,
- maxLength => 64,
- },
- }
- },
- returns => { type => "null" },
- code => sub {
- my ($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;
- 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 $u2f;
-}
-
-sub verify_user_tfa_config {
- my ($type, $tfa_cfg, $value) = @_;
-
- if (!defined($type)) {
- die "missing tfa 'type'\n";
- }
-
- if ($type ne 'oath') {
- die "invalid type for custom tfa authentication\n";
- }
-
- my $secret = $tfa_cfg->{keys}
- or die "missing TOTP secret\n";
- $tfa_cfg = $tfa_cfg->{config};
- # Copy the hash to verify that we have no unexpected keys without modifying the original hash.
- $tfa_cfg = {%$tfa_cfg};
-
- # We can only verify 1 secret but oath_verify_otp allows multiple:
- if (scalar(PVE::Tools::split_list($secret)) != 1) {
- die "only exactly one secret key allowed\n";
- }
-
- my $digits = delete($tfa_cfg->{digits}) // 6;
- my $step = delete($tfa_cfg->{step}) // 30;
- # Maybe also this?
- # my $algorithm = delete($tfa_cfg->{algorithm}) // 'sha1';
-
- if (length(my $more = join(', ', keys %$tfa_cfg))) {
- die "unexpected tfa config keys: $more\n";
- }
-
- PVE::OTP::oath_verify_otp($value, $secret, $step, $digits);
-}
-
-__PACKAGE__->register_method ({
- name => 'change_tfa',
- path => 'tfa',
- method => 'PUT',
- permissions => {
- description => 'A user can change their own u2f or totp token.',
- check => [ 'or',
- ['userid-param', 'self'],
- [ 'and',
- [ 'userid-param', 'Realm.AllocateUser'],
- [ 'userid-group', ['User.Modify']]
- ]
- ],
- },
- protected => 1, # else we can't access shadow files
- allowtoken => 0, # we don't want tokens to change the regular user's TFA settings
- description => "Change user u2f authentication.",
- parameters => {
- additionalProperties => 0,
- properties => {
- userid => get_standard_option('userid', {
- completion => \&PVE::AccessControl::complete_username,
- }),
- password => {
- optional => 1, # Only required if not root@pam
- description => "The current password.",
- type => 'string',
- minLength => 5,
- maxLength => 64,
- },
- action => {
- description => 'The action to perform',
- type => 'string',
- enum => [qw(delete new confirm)],
- },
- response => {
- optional => 1,
- description =>
- 'Either the the response to the current u2f registration challenge,'
- .' or, when adding TOTP, the currently valid TOTP value.',
- type => 'string',
- },
- key => {
- optional => 1,
- description => 'When adding TOTP, the shared secret value.',
- type => 'string',
- format => 'pve-tfa-secret',
- },
- config => {
- optional => 1,
- description => 'A TFA configuration. This must currently be of type TOTP of not set at all.',
- type => 'string',
- format => 'pve-tfa-config',
- maxLength => 128,
- },
- }
- },
- returns => { type => 'object' },
- code => sub {
- my ($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 $key = delete($param->{key});
- my $config = delete($param->{config});
-
- 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 '$realm' does not exist\n" if !$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 ($action eq 'new') {
- if (defined($config)) {
- $config = PVE::Auth::Plugin::parse_tfa_config($config);
- my $type = delete($config->{type});
- my $tfa_cfg = {
- keys => $key,
- config => $config,
- };
- verify_user_tfa_config($type, $tfa_cfg, $response);
- PVE::AccessControl::user_set_tfa($userid, $realm, $type, $tfa_cfg);
- } else {
- # The default is U2F:
- 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 => $publicKey, # already base64 encoded
- });
- } else {
- die "invalid action: $action\n";
- }
-
- return {};
- }});
-
-__PACKAGE__->register_method({
- name => 'verify_tfa',
- path => 'tfa',
- method => 'POST',
- permissions => { user => 'all' },
- protected => 1, # else we can't access shadow files
- allowtoken => 0, # we don't want tokens to access TFA information
- description => 'Finish a u2f challenge.',
- parameters => {
- additionalProperties => 0,
- properties => {
- response => {
- type => 'string',
- description => 'The response to the current authentication challenge.',
- },
- }
- },
- returns => {
- type => 'object',
- properties => {
- ticket => { type => 'string' },
- # cap
- }
- },
- code => sub {
- my ($param) = @_;
-
- my $rpcenv = PVE::RPCEnvironment::get();
- my $authuser = $rpcenv->get_user();
- my ($username, undef, $realm) = PVE::AccessControl::verify_username($authuser);
-
- my ($tfa_type, $tfa_data) = PVE::AccessControl::user_get_tfa($username, $realm);
- if (!defined($tfa_type)) {
- raise('no u2f data available');
- }
-
- eval {
- if ($tfa_type eq 'u2f') {
- my $challenge = $rpcenv->get_u2f_challenge()
- or raise('no active challenge');
-
- my $keyHandle = $tfa_data->{keyHandle};
- my $publicKey = $tfa_data->{publicKey};
- raise("incomplete u2f setup")
- if !defined($keyHandle) || !defined($publicKey);
-
- my $u2f = get_u2f_instance($rpcenv, $publicKey, $keyHandle);
- $u2f->set_challenge($challenge);
-
- my ($counter, $present) = $u2f->auth_verify($param->{response});
- # Do we want to do anything with these?
- } else {
- # sanity check before handing off to the verification code:
- my $keys = $tfa_data->{keys} or die "missing tfa keys\n";
- my $config = $tfa_data->{config} or die "bad tfa entry\n";
- PVE::AccessControl::verify_one_time_pw($tfa_type, $authuser, $keys, $config, $param->{response});
- }
- };
- 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);
- }
-
- return {
- ticket => PVE::AccessControl::assemble_ticket($authuser),
- cap => &$compute_api_permission($rpcenv, $authuser),
- }
- }});
-
-__PACKAGE__->register_method({
- name => 'permissions',
- path => 'permissions',
- method => 'GET',
- description => 'Retrieve effective permissions of given user/token.',
- permissions => {
- description => "Each user/token is allowed to dump their own permissions. A user can dump the permissions of another user if they have 'Sys.Audit' permission on /access.",
- user => 'all',
- },
- parameters => {
- additionalProperties => 0,
- properties => {
- userid => {
- type => 'string',
- description => "User ID or full API token ID",
- pattern => $PVE::AccessControl::userid_or_token_regex,
- optional => 1,
- },
- path => get_standard_option('acl-path', {
- description => "Only dump this specific path, not the whole tree.",
- optional => 1,
- }),
- },
- },
- returns => {
- type => 'object',
- description => 'Map of "path" => (Map of "privilege" => "propagate boolean").',
- },
- code => sub {
- my ($param) = @_;
-
- my $rpcenv = PVE::RPCEnvironment::get();
-
- my $userid = $param->{userid};
- if (defined($userid)) {
- $rpcenv->check($rpcenv->get_user(), '/access', ['Sys.Audit']);
- } else {
- $userid = $rpcenv->get_user();
- }
-
- my $res;
-
- if (my $path = $param->{path}) {
- my $perms = $rpcenv->permissions($userid, $path);
- if ($perms) {
- $res = { $path => $perms };
- } else {
- $res = {};
- }
- } else {
- $res = $rpcenv->get_effective_permissions($userid);
- }
-
- return $res;
- }});
-
-1;
projects / pve-access-control.git / blobdiff