\ net2o connection setup commands
\ Copyright (C) 2011-2014 Bernd Paysan
\ This program is free software: you can redistribute it and/or modify
\ it under the terms of the GNU Affero General Public License as published by
\ the Free Software Foundation, either version 3 of the License, or
\ (at your option) any later version.
\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\ GNU Affero General Public License for more details.
\ You should have received a copy of the GNU Affero General Public License
\ along with this program. If not, see <http://www.gnu.org/licenses/>.
Forward >invitations
in net2o Forward dispose-punchs
Forward mynick$
Forward invite-me
Forward qr-invite-me
Defer <invite-result>
scope{ net2o-base
\ nat traversal functions
reply-table $@ inherit-table connect-table
\g
\g ### connection generic commands ###
\g
$20 net2o: request-done ( ureq -- ) 64>n \g signal request is completed
o 0<> own-crypt? and IF net2o:request-done ELSE drop THEN ;
+net2o: set-cookie ( utimestamp -- ) \g cookies and round trip delays
own-crypt? IF trace( ." owncrypt " )
64dup cookie>context?
IF cookie( ." context " dup hex. forth:cr ) >o rdrop o to connection
ack@ >o ticker 64@ recv-tick 64! rtdelay! o> \ time stamp of arrival
EXIT
ELSE \ just check if timeout didn't expire
cookie( ." ticker " forth:cr )
64dup context-ticker 64!
[ tmp-cookie .cc-secret ]L KEYBYTES do-keypad sec!
ticker 64@ 64swap 64- connect-timeout# 64< ?EXIT
<err> ." cookie: no context, un-cmd" <default> forth:cr
THEN
ELSE 64drop
<err> ." cookie: no owncrypt, un-cmd" <default> forth:cr
THEN
un-cmd ;
+net2o: punch-load, ( $:string -- ) \g use for punch payload: nest it
$> $, nest o IF
nat( ." punch from: " return-address .addr-path forth:cr )
['] punchs code-reply is send-xt THEN
net2o:dispose-punchs ;
+net2o: punch ( $:string -- ) \g punch NAT traversal hole
$> nat( ." punch to: " 2dup .addr$ forth:cr ) net2o:punch ;
+net2o: punch-done ( -- ) \g punch received
o 0<> own-crypt? and IF
o-beacon ret+beacon
nat( ticks .ticks ." punch done: " return-address .addr-path forth:cr )
ELSE
nat( ticks .ticks ." punch not done: " return-addr .addr-path forth:cr )
THEN ;
}scope
scope{ net2o-base
connect-table $@ inherit-table setup-table
\g
\g ### connection setup commands ###
\g
$30 net2o: tmpnest ( $:string -- ) \g nested (temporary encrypted) command
$> cmdtmpnest ;
+net2o: encnest ( $:string -- ) \g nested (completely encrypted) command
$> cmdencnest ;
: ]tmpnest ( -- ) end-cmd cmd>tmpnest 2drop tmpnest ;
: ]encnest ( -- ) end-cmd cmd>encnest 2drop encnest ;
+net2o: close-tmpnest ( -- )
\g cose a opened tmpnest, and add the necessary stuff
nest-stack $[]# IF ]tmpnest THEN ;
+net2o: close-encnest ( -- )
\g cose a opened encnest, and add the necessary stuff
nest-stack $[]# IF ]encnest THEN ;
+net2o: new-data ( addr addr u -- ) \g create new data mapping
o 0<> tmp-crypt? and own-crypt? or IF 64>n new-data! EXIT THEN
64drop 64drop 64drop un-cmd ;
+net2o: new-code ( addr addr u -- ) \g crate new code mapping
o 0<> tmp-crypt? and own-crypt? or IF 64>n new-code! EXIT THEN
64drop 64drop 64drop un-cmd ;
in net2o : create-map
{ 64: addrs ucode udata 64: addrd -- addrd ucode udata addrs }
addrs lit, addrd lit, ucode ulit, new-code
addrs min-size ucode lshift n>64 64+ lit,
addrd min-size ucode lshift n>64 64+ lit, udata ulit, new-data
addrd ucode udata addrs ;
: cookie, ( -- ) add-cookie lit, set-cookie ;
: #request, ( -- ) ulit, request-done ;
: request, ( -- ) next-request #request, ;
+net2o: store-key ( $:string -- ) $> \g store key
own-crypt? IF true !!deprecated!!
key( ." store key: o=" o hex. 2dup .nnb forth:cr )
2dup do-keypad sec!
o IF crypto-key sec! ELSE 2drop THEN
ELSE 2drop un-cmd THEN ;
: sec-cookie, ( -- ) ?new-mykey
keypad [ tmp-cookie .cc-secret ]L keysize move
0 >o cookie, o> stskc KEYSIZE erase ;
+net2o: map-request ( addrs ucode udata -- ) \g request mapping
2*64>n
nest[ sec-cookie,
max-data# umin swap max-code# umin swap
net2o:new-map net2o:create-map
\ keypad keysize sec$, store-key stskc KEYSIZE erase
]nest net2o:create-map
64drop 2drop 64drop ;
+net2o: set-tick ( uticks -- ) \g adjust time
o IF
adjust-timer( ." adjust timer" forth:cr )
ack@ .adjust-ticks
ELSE
adjust-timer( ." no object: don't adjust timer " o hex. forth:cr )
64drop
THEN ;
+net2o: get-tick ( -- ) \g request time adjust
ticks lit, set-tick ;
net2o-base
\ crypto functions
+net2o: receive-tmpkey ( $:key -- ) $> \g receive emphemeral key
net2o:receive-tmpkey ;
+net2o: tmpkey-request ( -- ) \g request ephemeral key
stpkc keysize $, receive-tmpkey nest[ ;
+net2o: keypair ( $:yourkey $:mykey -- ) \g select a pubkey
$> $> tmp-crypt? IF 2swap net2o:keypair ELSE 2drop 2drop THEN ;
+net2o: update-key ( -- ) \g update secrets
net2o:update-key ;
+net2o: gen-ivs ( $:string -- ) \g generate IVs
$> tmp-ivs sec! [ ivs-val receive-val or ]L validated or! ;
+net2o: addr-key! ( $:string -- ) \g set key for reply
$> dup ?keysize lastaddr# cell+ $! ;
: 0key, ( -- ) my-0key sec@ sec$, addr-key! ;
: gen-punch ( -- ) nat( ." gen punches" forth:cr )
my-addr$ [: -sig nat( ticks .ticks ." gen punch: " 2dup .addr$ forth:cr ) $, punch ;] $[]map ;
: cookie+request ( -- ) request( ." gen cookie" forth:cr )
nest[ cookie, request, ]nest ;
: new-request ( -- )
next-request request-gen ! ;
: gen-punchload ( flag -- ) >r request( ." gen punchload" forth:cr )
nest[ cookie, punch-done request-gen @ #request,
reply-index ulit, ok
r> IF push' nop THEN \ auto-nop if necessary
]nest$ punch-load, net2o:expect-reply maxdata code+ ;
+net2o: punch? ( -- ) \g Request punch addresses
nat( ." punch?" forth:cr ) gen-punch ;
\ create commands to send back
}scope
: new-ivs ( -- )
tmp-ivs sec@ ivs-strings
validated @ receive-val and IF receive-ivs ELSE send-ivs THEN
tmp-ivs sec-free ;
scope{ net2o-base
: all-ivs ( -- ) \G Seed and gen all IVS
state# rng$ 2dup sec$, gen-ivs tmp-ivs sec!
validated @ ivs-val or receive-val invert and validated ! ;
+net2o: >time-offset ( n -- ) \g set time offset
o IF ack@ .time-offset 64! ELSE 64drop THEN ;
+net2o: context ( -- ) \g make context active
update-cdmap o IF context! ELSE connect( ." Can't " ) THEN
connect( ." establish a context!" forth:cr ) ;
: time-offset! ( -- ) ticks 64dup lit, >time-offset ack@ .time-offset 64! ;
\ error ID handling
Variable id#
Sema id-sema
: new-error-id ( -- addr u )
$10 rng$ o { w^ idcon } idcon cell 2over
[: id# #! ;] id-sema c-section
2dup my-error-id $! ;
: error-id>o ( addr u -- o/0 )
$error-id $@ ?dup-IF
id# #@ cell = IF
@ EXIT THEN THEN
drop 0 ;
: error-id$off ( -- )
[: my-error-id $@ ?dup-IF id# #free ELSE drop THEN
my-error-id $off ;] id-sema c-section ;
:noname error-id$off defers extra-dispose ; IS extra-dispose
\ compile a reply key
: reply-key, ( -- )
key-setup? !!doublekey!!
nest[
new-error-id $, error-id
pk@ key| $, pubkey $@len 0> keypad$ nip keysize u<= and IF
pubkey $@ key| $, keypair
pubkey $@ drop sk@ drop key-stage2
ELSE !!nokey!! THEN
update-key all-ivs ;
: reply-key ( -- ) crypt( ." Reply key: " tmpkey@ .nnb forth:cr )
reply-key, ( cookie+request ) time-offset! context ]tmpnest
push-cmd ;
+net2o: gen-reply ( -- ) \g generate a key request reply
own-crypt? IF ['] reply-key IS expect-reply? THEN ;
+net2o: gen-punch-reply ( -- ) ( obsolete dummy ) ;
\ one-shot packets
+net2o: invite ( $:nick+sig $:pk -- ) \g invite someone
$> ?keysize search-key 2drop
$> tmp-crypt? dup invit:pend# and ulit, <invite-result>
IF
pk2-sig? !!sig!! >invitations
do-keypad sec-free
ELSE ." invitation didn't decrypt" forth:cr 2drop THEN ;
+net2o: request-invitation ( -- )
\g ask for an invitation as second stage of invitation handshake
own-crypt? IF invite-me THEN ;
\ more one shot stuff for QR codes
+net2o: sign-invite ( $:signature -- ) \g send you a signature
$> sigpksize# <> !!unsigned!!
c:0key mynick$ sigsize# - c:hash pk-sig? \ 0 is valid signature
0= IF ke-sigs[] $+[]! ELSE 2drop THEN
\ !!FIXME!! qr scan done, do something about it
;
+net2o: request-qr-invitation ( -- )
\g ask for an invitation as second stage of invitation handshake
own-crypt? IF qr-invite-me THEN ;
+net2o: tmp-secret, ( -- )
nest[ sec-cookie, ]nest ;
+net2o: qr-challenge ( $:challenge $:respose -- )
\ !!FIXME!! the qr-challenge should include pubkey+sig into the hash
$> $> c:0key qr-key $8 >keyed-hash qr-hash $40 c:hash@
qr-hash over $10 umax str= dup invit:qr# and ulit, <invite-result>
\ challenge will fail if less than 16 bytes
IF msg( ." challenge accepted" forth:cr )
qr-tmp-val validated or!
ELSE
msg( ." challenge failed: " qr-hash $40 85type
forth:cr ." qr-key: " qr-key 8 xtype forth:cr )
THEN ;
+net2o: invite-result ( flag -- )
o IF to invite-result# THEN ;
' invite-result is <invite-result>
}scope
setup-table $save
connect-table $save
\\\
Local Variables:
forth-local-words:
(
(("net2o:" "+net2o:") definition-starter (font-lock-keyword-face . 1)
"[ \t\n]" t name (font-lock-function-name-face . 3))
("[a-z\-0-9]+(" immediate (font-lock-comment-face . 1)
")" nil comment (font-lock-comment-face . 1))
)
forth-local-indent-words:
(
(("net2o:" "+net2o:") (0 . 2) (0 . 2) non-immediate)
(("[:") (0 . 1) (0 . 1) immediate)
((";]") (-1 . 0) (0 . -1) immediate)
)
End:
[THEN]