… | |
… | |
26 | |
26 | |
27 | use Scalar::Util; |
27 | use Scalar::Util; |
28 | use MIME::Base64 (); |
28 | use MIME::Base64 (); |
29 | use Storable (); |
29 | use Storable (); |
30 | use JSON::XS (); |
30 | use JSON::XS (); |
|
|
31 | |
|
|
32 | use Digest::MD6 (); |
|
|
33 | use Digest::HMAC_MD6 (); |
31 | |
34 | |
32 | use AE (); |
35 | use AE (); |
33 | use AnyEvent::Socket (); |
36 | use AnyEvent::Socket (); |
34 | use AnyEvent::Handle (); |
37 | use AnyEvent::Handle (); |
35 | |
38 | |
… | |
… | |
126 | $self->{queue} = []; |
129 | $self->{queue} = []; |
127 | |
130 | |
128 | { |
131 | { |
129 | Scalar::Util::weaken (my $self = $self); |
132 | Scalar::Util::weaken (my $self = $self); |
130 | |
133 | |
131 | $arg{tls_ctx_disabled} ||= { |
|
|
132 | sslv2 => 0, |
|
|
133 | sslv3 => 0, |
|
|
134 | tlsv1 => 1, |
|
|
135 | verify => 1, |
|
|
136 | cert_file => "secret.pem", |
|
|
137 | ca_file => "secret.pem", |
|
|
138 | verify_require_client_cert => 1, |
|
|
139 | }; |
|
|
140 | |
|
|
141 | $arg{secret} = AnyEvent::MP::Base::default_secret () |
134 | $arg{secret} = AnyEvent::MP::Base::default_secret () |
142 | unless exists $arg{secret}; |
135 | unless exists $arg{secret}; |
|
|
136 | |
|
|
137 | $arg{timeout} = 30 |
|
|
138 | unless exists $arg{timeout}; |
|
|
139 | |
|
|
140 | my $keepalive = (int $arg{timeout} * 0.75) || 1; |
|
|
141 | |
|
|
142 | my $secret = $arg{secret}; |
|
|
143 | |
|
|
144 | if ($secret =~ /-----BEGIN RSA PRIVATE KEY-----.*-----END RSA PRIVATE KEY-----.*-----BEGIN CERTIFICATE-----.*-----END CERTIFICATE-----/s) { |
|
|
145 | # assume TLS mode |
|
|
146 | $arg{tls_ctx} = { |
|
|
147 | sslv2 => 0, |
|
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148 | sslv3 => 0, |
|
|
149 | tlsv1 => 1, |
|
|
150 | verify => 1, |
|
|
151 | cert => $secret, |
|
|
152 | ca_cert => $secret, |
|
|
153 | verify_require_client_cert => 1, |
|
|
154 | }; |
|
|
155 | } |
143 | |
156 | |
144 | $self->{hdl} = new AnyEvent::Handle |
157 | $self->{hdl} = new AnyEvent::Handle |
145 | fh => delete $arg{fh}, |
158 | fh => delete $arg{fh}, |
146 | autocork => 1, |
159 | autocork => 1, |
147 | no_delay => 1, |
160 | no_delay => 1, |
148 | on_error => sub { |
161 | on_error => sub { |
149 | $self->error ($_[2]); |
162 | $self->error ($_[2]); |
150 | }, |
163 | }, |
|
|
164 | timeout => $AnyEvent::MP::Base::CONNECT_TIMEOUT, |
151 | peername => delete $arg{peername}, |
165 | peername => delete $arg{peername}, |
152 | ; |
166 | ; |
153 | |
167 | |
154 | my $secret = $arg{secret}; |
|
|
155 | my $greeting_kv = $self->{greeting} ||= {}; |
168 | my $greeting_kv = $self->{greeting} ||= {}; |
|
|
169 | |
|
|
170 | $self->{local_node} = $AnyEvent::MP::Base::NODE; |
|
|
171 | |
156 | $greeting_kv->{"tls"} = "1.0" |
172 | $greeting_kv->{"tls"} = "1.0" if $arg{tls_ctx}; |
157 | if $arg{tls_ctx}; |
|
|
158 | $greeting_kv->{provider} = "AE-$VERSION"; |
173 | $greeting_kv->{provider} = "AE-$VERSION"; |
159 | $greeting_kv->{peeraddr} = AnyEvent::Socket::format_hostport $self->{peerhost}, $self->{peerport}; |
174 | $greeting_kv->{peeraddr} = AnyEvent::Socket::format_hostport $self->{peerhost}, $self->{peerport}; |
|
|
175 | $greeting_kv->{maxidle} = $keepalive; |
160 | |
176 | |
161 | # send greeting |
177 | # send greeting |
162 | my $lgreeting1 = "aemp;$PROTOCOL_VERSION" |
178 | my $lgreeting1 = "aemp;$PROTOCOL_VERSION" |
163 | . ";$AnyEvent::MP::Base::UNIQ" |
179 | . ";$AnyEvent::MP::Base::UNIQ" |
164 | . ";$AnyEvent::MP::Base::NODE" |
180 | . ";$self->{local_node}" |
165 | . ";" . (join ",", @AUTH_RCV) |
181 | . ";" . (join ",", @AUTH_RCV) |
166 | . ";" . (join ",", @FRAMINGS) |
182 | . ";" . (join ",", @FRAMINGS) |
167 | . (join "", map ";$_=$greeting_kv->{$_}", keys %$greeting_kv); |
183 | . (join "", map ";$_=$greeting_kv->{$_}", keys %$greeting_kv); |
168 | |
184 | |
169 | my $lgreeting2 = MIME::Base64::encode_base64 AnyEvent::MP::Base::nonce (33), ""; |
185 | my $lgreeting2 = MIME::Base64::encode_base64 AnyEvent::MP::Base::nonce (33), ""; |
… | |
… | |
217 | |
233 | |
218 | # read nonce |
234 | # read nonce |
219 | $self->{hdl}->push_read (line => sub { |
235 | $self->{hdl}->push_read (line => sub { |
220 | my $rgreeting2 = $_[1]; |
236 | my $rgreeting2 = $_[1]; |
221 | |
237 | |
|
|
238 | "$lgreeting1\012$lgreeting2" ne "$rgreeting1\012$rgreeting2" # echo attack? |
|
|
239 | or return $self->error ("authentication error, echo attack?"); |
|
|
240 | |
|
|
241 | my $key = Digest::MD6::md6 $secret; |
|
|
242 | my $lauth; |
|
|
243 | |
222 | if ($self->{tls_ctx} and 1 == int $self->{remote_greeting}{tls}) { |
244 | if ($self->{tls_ctx} and 1 == int $self->{remote_greeting}{tls}) { |
223 | $self->{tls} = $lgreeting2 lt $rgreeting2 ? "connect" : "accept"; |
245 | $self->{tls} = $lgreeting2 lt $rgreeting2 ? "connect" : "accept"; |
224 | $self->{hdl}->starttls ($self->{tls}, $self->{tls_ctx}); |
246 | $self->{hdl}->starttls ($self->{tls}, $self->{tls_ctx}); |
|
|
247 | $s_auth = "tls"; |
|
|
248 | $lauth = ""; |
|
|
249 | } else { |
|
|
250 | # we currently only support hmac_md6_64_256 |
|
|
251 | $lauth = Digest::HMAC_MD6::hmac_md6_hex $key, "$lgreeting1\012$lgreeting2\012$rgreeting1\012$rgreeting2\012", 64, 256; |
225 | } |
252 | } |
226 | |
|
|
227 | # auth |
|
|
228 | require Digest::MD6; |
|
|
229 | require Digest::HMAC_MD6; |
|
|
230 | |
|
|
231 | my $key = Digest::MD6::md6 ($secret); |
|
|
232 | my $lauth = Digest::HMAC_MD6::hmac_md6_hex ($key, "$lgreeting1\012$lgreeting2\012$rgreeting1\012$rgreeting2\012", 64, 256); |
|
|
233 | |
|
|
234 | my $rauth = |
|
|
235 | $s_auth eq "hmac_md6_64_256" ? Digest::HMAC_MD6::hmac_md6_hex ($key, "$rgreeting1\012$rgreeting2\012$lgreeting1\012$lgreeting2\012", 64, 256) |
|
|
236 | : $s_auth eq "cleartext" ? unpack "H*", $secret |
|
|
237 | : die; |
|
|
238 | |
|
|
239 | $lauth ne $rauth # echo attack? |
|
|
240 | or return $self->error ("authentication error"); |
|
|
241 | |
253 | |
242 | $self->{hdl}->push_write ("$s_auth;$lauth;$s_framing\012"); |
254 | $self->{hdl}->push_write ("$s_auth;$lauth;$s_framing\012"); |
243 | |
255 | |
244 | # reasd the authentication response |
256 | # read the authentication response |
245 | $self->{hdl}->push_read (line => sub { |
257 | $self->{hdl}->push_read (line => sub { |
246 | my ($hdl, $rline) = @_; |
258 | my ($hdl, $rline) = @_; |
247 | |
259 | |
248 | my ($auth_method, $rauth2, $r_framing) = split /;/, $rline; |
260 | my ($auth_method, $rauth2, $r_framing) = split /;/, $rline; |
|
|
261 | |
|
|
262 | my $rauth = |
|
|
263 | $auth_method eq "hmac_md6_64_256" ? Digest::HMAC_MD6::hmac_md6_hex $key, "$rgreeting1\012$rgreeting2\012$lgreeting1\012$lgreeting2\012", 64, 256 |
|
|
264 | : $auth_method eq "cleartext" ? unpack "H*", $secret |
|
|
265 | : $auth_method eq "tls" ? ($self->{tls} ? "" : "\012\012") # \012\012 never matches |
|
|
266 | : return $self->error ("$auth_method: fatal, selected unsupported auth method"); |
249 | |
267 | |
250 | if ($rauth2 ne $rauth) { |
268 | if ($rauth2 ne $rauth) { |
251 | return $self->error ("authentication failure/shared secret mismatch"); |
269 | return $self->error ("authentication failure/shared secret mismatch"); |
252 | } |
270 | } |
253 | |
271 | |
254 | $self->{s_framing} = $s_framing; |
272 | $self->{s_framing} = $s_framing; |
255 | |
273 | |
256 | $hdl->rbuf_max (undef); |
274 | $hdl->rbuf_max (undef); |
257 | my $queue = delete $self->{queue}; # we are connected |
275 | my $queue = delete $self->{queue}; # we are connected |
258 | |
276 | |
|
|
277 | $self->{hdl}->timeout ($self->{remote_greeting}{keepalive} + 5) |
|
|
278 | if $self->{remote_greeting}{keepalive}; |
|
|
279 | |
259 | $self->connected; |
280 | $self->connected; |
260 | |
281 | |
261 | my $src_node = $self->{node}; |
282 | my $src_node = $self->{node}; |
262 | |
283 | |
263 | $hdl->push_write ($self->{s_framing} => $_) |
284 | $self->send ($_) |
264 | for @$queue; |
285 | for @$queue; |
265 | |
286 | |
266 | my $rmsg; $rmsg = sub { |
287 | my $rmsg; $rmsg = sub { |
267 | $_[0]->push_read ($r_framing => $rmsg); |
288 | $_[0]->push_read ($r_framing => $rmsg); |
268 | |
289 | |
269 | local $AnyEvent::MP::Base::SRCNODE = $src_node; |
290 | local $AnyEvent::MP::Base::SRCNODE = $src_node; |
270 | AnyEvent::MP::Base::_inject (@{ $_[1] }); |
291 | AnyEvent::MP::Base::_inject (@{ $_[1] }); |
271 | }; |
292 | }; |
… | |
… | |
280 | |
301 | |
281 | sub error { |
302 | sub error { |
282 | my ($self, $msg) = @_; |
303 | my ($self, $msg) = @_; |
283 | |
304 | |
284 | if ($self->{node} && $self->{node}{transport} == $self) { |
305 | if ($self->{node} && $self->{node}{transport} == $self) { |
|
|
306 | #TODO: store error, but do not instantly fail |
|
|
307 | $self->{node}->fail (transport_error => $self->{node}{noderef}, $msg); |
285 | $self->{node}->clr_transport; |
308 | $self->{node}->clr_transport; |
286 | } |
309 | } |
287 | $AnyEvent::MP::Base::WARN->("$self->{peerhost}:$self->{peerport}: $msg"); |
310 | $AnyEvent::MP::Base::WARN->("$self->{peerhost}:$self->{peerport}: $msg"); |
288 | $self->destroy; |
311 | $self->destroy; |
289 | } |
312 | } |
290 | |
313 | |
291 | sub connected { |
314 | sub connected { |
292 | my ($self) = @_; |
315 | my ($self) = @_; |
293 | |
316 | |
|
|
317 | if (ref $AnyEvent::MP::Base::SLAVE) { |
|
|
318 | # first connect with a master node |
|
|
319 | my $via = $self->{remote_node}; |
|
|
320 | $via =~ s/,/!/g; |
|
|
321 | $AnyEvent::MP::Base::NODE .= "\@$via"; |
|
|
322 | $AnyEvent::MP::Base::NODE{$AnyEvent::MP::Base::NODE} = $AnyEvent::MP::Base::NODE{""}; |
|
|
323 | $AnyEvent::MP::Base::SLAVE->(); |
|
|
324 | } |
|
|
325 | |
|
|
326 | if ($self->{local_node} ne $AnyEvent::MP::Base::NODE) { |
|
|
327 | # node changed its name since first greeting |
|
|
328 | $self->send (["", iam => $AnyEvent::MP::Base::NODE]); |
|
|
329 | } |
|
|
330 | |
294 | my $node = AnyEvent::MP::Base::add_node ($self->{remote_node}); |
331 | my $node = AnyEvent::MP::Base::add_node ($self->{remote_node}); |
295 | Scalar::Util::weaken ($self->{node} = $node); |
332 | Scalar::Util::weaken ($self->{node} = $node); |
296 | $node->set_transport ($self); |
333 | $node->set_transport ($self); |
297 | } |
334 | } |
298 | |
335 | |
… | |
… | |
345 | |
382 | |
346 | The fixed strings are: |
383 | The fixed strings are: |
347 | |
384 | |
348 | =over 4 |
385 | =over 4 |
349 | |
386 | |
350 | =item C<aemp> |
387 | =item protocol identification |
351 | |
388 | |
352 | The constant C<aemp> to identify the protocol. |
389 | The constant C<aemp> to identify the protocol. |
353 | |
390 | |
354 | =item protocol version |
391 | =item protocol version |
355 | |
392 | |
356 | The protocol version supported by this end, currently C<0>. If the |
393 | The protocol version supported by this end, currently C<0>. If the |
357 | versions don't match then no communication is possible. Minor extensions |
394 | versions don't match then no communication is possible. Minor extensions |
358 | are supposed to be handled by addign additional key-value pairs. |
395 | are supposed to be handled through additional key-value pairs. |
359 | |
396 | |
360 | =item a token uniquely identifying the current node instance |
397 | =item a token uniquely identifying the current node instance |
361 | |
398 | |
362 | This is a string that must change between restarts. It usually contains |
399 | This is a string that must change between restarts. It usually contains |
363 | things like the current time, the (OS) process id or similar values, but |
400 | things like the current time, the (OS) process id or similar values, but |
… | |
… | |
402 | |
439 | |
403 | =item tls=<major>.<minor> |
440 | =item tls=<major>.<minor> |
404 | |
441 | |
405 | Indicates that the other side supports TLS (version should be 1.0) and |
442 | Indicates that the other side supports TLS (version should be 1.0) and |
406 | wishes to do a TLS handshake. |
443 | wishes to do a TLS handshake. |
|
|
444 | |
|
|
445 | =item maxidle=<seconds> |
|
|
446 | |
|
|
447 | The maximum amount of time the node will not sent data, i.e., idle. This |
|
|
448 | can be used to close the conenction when no data has been received for a |
|
|
449 | too-long time (say, maxidle + 5 seconds). |
407 | |
450 | |
408 | =back |
451 | =back |
409 | |
452 | |
410 | =head3 Second Greeting Line |
453 | =head3 Second Greeting Line |
411 | |
454 | |
… | |
… | |
423 | p/I122ql7kJR8lumW3lXlXCeBnyDAvz8NQo3x5IFowE4 |
466 | p/I122ql7kJR8lumW3lXlXCeBnyDAvz8NQo3x5IFowE4 |
424 | |
467 | |
425 | =head2 TLS handshake |
468 | =head2 TLS handshake |
426 | |
469 | |
427 | I<< If, after the handshake, both sides indicate interest in TLS, then the |
470 | I<< If, after the handshake, both sides indicate interest in TLS, then the |
428 | connection B<must> use TLS, or fail.>> |
471 | connection B<must> use TLS, or fail. >> |
429 | |
472 | |
430 | Both sides compare their nonces, and the side who sent the lower nonce |
473 | Both sides compare their nonces, and the side who sent the lower nonce |
431 | value ("string" comparison on the raw octet values) becomes the client, |
474 | value ("string" comparison on the raw octet values) becomes the client, |
432 | and the one with the higher nonce the server. |
475 | and the one with the higher nonce the server. |
433 | |
476 | |
… | |
… | |
477 | and remote greeting lines swapped: |
520 | and remote greeting lines swapped: |
478 | |
521 | |
479 | rauth = HMAC_MD6 key, "rgreeting1\012rgreeting2\012lgreeting1\012lgreeting2\012" |
522 | rauth = HMAC_MD6 key, "rgreeting1\012rgreeting2\012lgreeting1\012lgreeting2\012" |
480 | |
523 | |
481 | This is the token that is expected from the other side. |
524 | This is the token that is expected from the other side. |
|
|
525 | |
|
|
526 | =item tls |
|
|
527 | |
|
|
528 | This type is only valid iff TLS was enabled and the TLS handshake |
|
|
529 | was successful. It has no authentication data, as the server/client |
|
|
530 | certificate was successfully verified. |
|
|
531 | |
|
|
532 | Implementations supporting TLS I<must> accept this authentication type. |
482 | |
533 | |
483 | =back |
534 | =back |
484 | |
535 | |
485 | =item the authentication data |
536 | =item the authentication data |
486 | |
537 | |
… | |
… | |
513 | > sRG8bbc4TDbkpvH8FTP4HBs87OhepH6VuApoZqXXskuG |
564 | > sRG8bbc4TDbkpvH8FTP4HBs87OhepH6VuApoZqXXskuG |
514 | < aemp;0;nmpKd+gh;127.0.0.1:1235,[::1]:1235;hmac_md6_64_256,cleartext;json,storable;provider=AE-0.0;peeraddr=127.0.0.1:58760 |
565 | < aemp;0;nmpKd+gh;127.0.0.1:1235,[::1]:1235;hmac_md6_64_256,cleartext;json,storable;provider=AE-0.0;peeraddr=127.0.0.1:58760 |
515 | < dCEUcL/LJVSTJcx8byEsOzrwhzJYOq+L3YcopA5T6EAo |
566 | < dCEUcL/LJVSTJcx8byEsOzrwhzJYOq+L3YcopA5T6EAo |
516 | > hmac_md6_64_256;9513d4b258975accfcb2ab7532b83690e9c119a502c612203332a591c7237788;json |
567 | > hmac_md6_64_256;9513d4b258975accfcb2ab7532b83690e9c119a502c612203332a591c7237788;json |
517 | < hmac_md6_64_256;0298d6ba2240faabb2b2e881cf86b97d70a113ca74a87dc006f9f1e9d3010f90;json |
568 | < hmac_md6_64_256;0298d6ba2240faabb2b2e881cf86b97d70a113ca74a87dc006f9f1e9d3010f90;json |
518 | > ["","wkp","pinger","10.0.0.1:4040#nndKd+gn.a","resolved"] |
569 | > ["","lookup","pinger","10.0.0.1:4040#nndKd+gn.a","resolved"] |
519 | |
570 | |
520 | =head1 SEE ALSO |
571 | =head1 SEE ALSO |
521 | |
572 | |
522 | L<AnyEvent>. |
573 | L<AnyEvent>. |
523 | |
574 | |