common/onion is going to need to use this for the case where it finds a blinding
seed inside the TLV. But how it does ecdh is daemon-specific.
We already had this problem for devtools/gossipwith, which supplied a
special hsm_do_ecdh(). This just makes it more general.
So we create a generic ecdh() interface, with a specific implementation
which subdaemons and lightningd can use.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
ChangeLog-Added: New `getsharedsecret` command, which lets you compute a shared secret with this node knowing only a public point. This implements the BOLT standard of hashing the ECDH point, and is incompatible with ECIES.
This splits maybe_create_hsm_secret() in two parts (either encrypted
or in clear) for clarity, and adds an encryption detection in load_hsm().
There are actually three cases if an encryption key is passed:
- There is no hsm_secret => just create it and store the encrypted seed
- There is an encrypted hsm_secret => the provided key should be able to
decrypt the seed, if the wrong key is passed libsodium will nicely error
and hsmd will exit() to not throw a backtrace (using status_failed() as for
other errors) at the face of an user who mistyped its password.
- There is a non-encrypted hsm_secret => load the seed, delete the
hsm_secret, create the hsm_secret, store the encrypted seed.
We now have a pointer to chainparams, that fails valgrind if we do anything
chain-specific before setting it.
Suggested-by: Rusty Russell <@rustyrussell>
There are some more #if DEVELOPER one-liners coming, this makes them
clear, but still lets them stand out.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
I tried to just do gossipd, but it was uncontainable, so this ended up being
a complete sweep.
We didn't get much space saving in gossipd, even though we should save
24 bytes per node.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We set the version BIP32_VER_TEST_PRIVATE for testnet/regtest
BIP32 privkey generation with libwally-core, and set
BIP32_VER_MAIN_PRIVATE for mainnet.
For litecoin, we also set it like bitcoin else.
We couldn't use it before because it asserted dbid was non-zero. Remove
assert and save some code.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Header from folded patch 'fixup!_lightningd__use_hsm_get_client_fd()_helper_for_global_daemons_too.patch':
fixup! lightningd: use hsm_get_client_fd() helper for global daemons too.
Suggested-by: @ZmnSCPxj
That matches the other CSV names (HSM was the first, so it was written
before the pattern emerged).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The current code sends hsmstatus_client_bad_request via the req fd;
this won't work, since lightningd uses that synchronously and only
expects a reply to its commands. So send it via status_conn.
We also enhance hsmstatus_client_bad_request to include details, and
create convenience functions for it. Our previous handling was ad-hoc;
we sometimes just closed on the client without telling lightningd,
and sometimes we didn't tell lightningd *which* client was broken.
Also make every handler the exact same prototype, so they now use the
exact same patterns (hsmd *only* handles requests, makes replies).
I tested this manually by corrupting a request to hsmd.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We currently just ignore them. This is one reason the hsm (in some places)
explicitly calls log_broken so we get some idea.
This was the only subdaemon which had a NULL msgcb and msgname, so eliminate
those checks in subd.c.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
I crashed the HSMD, and it gave no output at all. That's because we
were only reading the status fd when we were waiting for a reply.
Fix this by using a separate request fd and status fd, which also means
that hsm_sync_read() is no longer required.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Originally we were supposed to tell the HSM we had just created the directory,
otherwise it wouldn't create a new seed. But we modified it to check if
there was a seed file anyway: just move that logic into a branch of hsmd.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We always hand in "NULL" (which means use tal_len on the msg), except
for two places which do that manually for no good reason.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Change all calls to use the correct serialization and deserialization
functions, include the correct headers and remove the control
messages.
Signed-off-by: Christian Decker <decker.christian@gmail.com>
Some fields were redundant, some are simply moved into 'struct lightningd'.
All routines updated to hand 'struct lightningd *ld' now.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Also, we split the more sophisticated json_add helpers to avoid pulling in
everything into lightning-cli, and unify the routines to print struct
short_channel_id (it's ':', not '/' too).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To avoid everything pulling in HTLCs stuff to the opening daemon, we
split the channel and commit_tx routines into initial_channel and
initial_commit_tx (no HTLC support) and move full HTLC supporting versions
into channeld.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Now we're always sync, just use an fd. Put the hsm_sync_read() helper
here, too, and do HSM init sync which makes things much simpler.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Wallet should really be the container for anything bip32 related, so
I'd like to slowly wean off of `ld->bip32_base` in favor of
`ld->wallet->bip32_base`
This matters in one case: channeld receiving a bad message is a
permenant failure, whereas losing a connection is transient.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rather a big commit, but I couldn't figure out how to split it
nicely. It introduces a new message from the channel to the master
signaling that the channel has been announced, so that the master can
take care of announcing the node itself. A provisorial announcement is
created and passed to the HSM, which signs it and passes it back to
the master. Finally the master injects it into gossipd which will take
care of broadcasting it.
Instead of reusing HSMFD_ECDH, we have an explicit channeld hsm fd,
which can do ECDH and will soon do channel announce signatures as well.
Based-on: Christian Decker <decker.christian@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
If a peer dies, and then we get a reply, that can cause access after free.
The usual way to handle this is to make the request a child of the peer,
but in fact we still want to catch (and disard) it, so it's a little
more complex internally.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Instead of indicating where to place the fd, you say how many: the
fd array gets passed into the callback.
This is also clearer for the users.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
For the moment this is simply handed through to lightningd for
generating the per-peer secrets; eventually the HSM should keep it and
all peer secret key operations would be done via HSM-ops.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
ZmnSCPxj jxPCSnmZ
darosior
Christian Decker
trueptolemy