6 use Crypt
::OpenSSL
::Random
;
7 use Crypt
::OpenSSL
::RSA
;
10 use Time
::HiRes
qw(gettimeofday);
13 use PVE
::Exception
qw(raise);
15 Crypt
::OpenSSL
::RSA-
>import_random_seed();
17 use constant HTTP_UNAUTHORIZED
=> 401;
19 sub assemble_csrf_prevention_token
{
20 my ($secret, $username) = @_;
22 my $timestamp = sprintf("%08X", time());
24 my $digest = Digest
::SHA
::hmac_sha256_base64
("$timestamp:$username", $secret);
26 return "$timestamp:$digest";
29 sub verify_csrf_prevention_token
{
30 my ($secret, $username, $token, $min_age, $max_age, $noerr) = @_;
32 if ($token =~ m/^([A-Z0-9]{8}):(\S+)$/) {
35 my $ttime = hex($timestamp);
38 if (length($sig) == 27) {
39 # detected sha1 csrf token from older proxy, fallback. FIXME: remove with 7.0
40 $digest = Digest
::SHA
::sha1_base64
("$timestamp:$username", $secret);
42 $digest = Digest
::SHA
::hmac_sha256_base64
("$timestamp:$username", $secret);
45 my $age = time() - $ttime;
46 return 1 if ($digest eq $sig) && ($age > $min_age) &&
50 raise
("Permission denied - invalid csrf token\n", code
=> HTTP_UNAUTHORIZED
)
56 # Note: data may not contain white spaces (verify fails in that case)
57 sub assemble_rsa_ticket
{
58 my ($rsa_priv, $prefix, $data, $secret_data) = @_;
60 my $timestamp = sprintf("%08X", time());
62 my $plain = "$prefix:";
65 $data = uri_escape
($data, ':');
71 my $full = defined($secret_data) ?
"$plain:$secret_data" : $plain;
73 my $ticket = $plain . "::" . encode_base64
($rsa_priv->sign($full), '');
78 sub verify_rsa_ticket
{
79 my ($rsa_pub, $prefix, $ticket, $secret_data, $min_age, $max_age, $noerr) = @_;
81 if ($ticket && $ticket =~ m/^(\Q$prefix\E:\S+)::([^:\s]+)$/) {
85 my $full = defined($secret_data) ?
"$plain:$secret_data" : $plain;
87 if ($rsa_pub->verify($full, decode_base64
($sig))) {
88 if ($plain =~ m/^\Q$prefix\E:(?:(\S+):)?([A-Z0-9]{8})$/) {
89 my $data = $1; # Note: not all tickets contains data
91 my $ttime = hex($timestamp);
93 my $age = time() - $ttime;
96 $data = uri_unescape
($data);
99 if (($age > $min_age) && ($age < $max_age)) {
100 if (defined($data)) {
101 return wantarray ?
($data, $age) : $data;
103 return wantarray ?
(1, $age) : 1;
110 raise
("permission denied - invalid $prefix ticket\n", code
=> HTTP_UNAUTHORIZED
)
116 sub assemble_spice_ticket
{
117 my ($secret, $username, $vmid, $node) = @_;
119 my ($seconds, $microseconds) = gettimeofday
;
121 my $timestamp = sprintf("%08x", $seconds);
123 my $randomstr = "PVESPICE:$timestamp:$username:$vmid:$node:$secret:" .
124 ':' . sprintf("%08x", $microseconds) .
125 ':' . sprintf("%08x", $$) .
128 # this should be used as one-time password
129 # max length is 60 chars (spice limit)
130 # we pass this to qemu set_pasword and limit lifetime there
132 my $ticket = Digest
::SHA
::sha1_hex
($randomstr);
134 # Note: spice proxy connects with HTTP, so $proxyticket is exposed to public
135 # we use a signature/timestamp to make sure nobody can fake such a ticket
136 # an attacker can use this $proxyticket, but he will fail because $ticket is
138 # The proxy needs to be able to extract/verify the ticket
139 # Note: data needs to be lower case only, because virt-viewer needs that
140 # Note: RSA signature are too long (>=256 charaters) and make problems with remote-viewer
142 my $plain = "pvespiceproxy:${timestamp}:${vmid}:" . lc($node);
144 # produces 40 characters
145 my $sig = unpack("H*", Digest
::SHA
::sha1
($plain, $secret));
147 #my $sig = unpack("H*", $rsa_priv->sign($plain)); # this produce too long strings (512)
149 my $proxyticket = "${plain}::${sig}";
151 return ($ticket, $proxyticket);
154 sub verify_spice_connect_url
{
155 my ($secret, $connect_str) = @_;
157 # Note: we pass the spice ticket as 'host', so the
158 # spice viewer connects with "$ticket:$port"
160 return undef if !$connect_str;
162 if ($connect_str =~m/^pvespiceproxy:([a-z0-9]{8}):(\d+):(\S+)::([a-z0-9]{40}):(\d+)$/) {
163 my ($timestamp, $vmid, $node, $hexsig, $port) = ($1, $2, $3, $4, $5, $6);
164 my $ttime = hex($timestamp);
165 my $age = time() - $ttime;
167 # use very limited lifetime - is this enough?
168 return undef if !(($age > -20) && ($age < 40));
170 my $plain = "pvespiceproxy:$timestamp:$vmid:$node";
171 my $sig = unpack("H*", Digest
::SHA
::sha1
($plain, $secret));
173 if ($sig eq $hexsig) {
174 return ($vmid, $node, $port);