From: Karl Johan Alm <karljohan-alm@garage•co.jp>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists•linuxfoundation.org>
Subject: [bitcoin-dev] {sign|verify}message replacement
Date: Wed, 14 Mar 2018 04:09:20 -0400 [thread overview]
Message-ID: <CALJw2w5=g-FL+MZ08DEoLxVzOKbSXeKu50drE1b4P0JZJpdTyA@mail.gmail.com> (raw)
Hello,
I am considering writing a replacement for the message signing tools
that are currently broken for all but the legacy 1xx addresses. The
approach (suggested by Pieter Wuille) is to do a script based
approach. This does not seem to require a lot of effort for
implementing in Bitcoin Core*. Below is my proposal for this system:
A new structure SignatureProof is added, which is a simple scriptSig &
witnessProgram container that can be serialized. This is passed out
from/into the signer/verifier.
RPC commands:
sign <address> <message> [<prehashed>=false]
Generates a signature proof for <message> using the same method that
would be used to spend coins sent to <address>.**
verify <address> <message> <proof> [<prehashed>=false]
Deserializes and executes the proof using a custom signature checker
whose sighash is derived from <message>. Returns true if the check
succeeds, and false otherwise. The scriptPubKey is derived directly
from <address>.**
Feedback welcome.
-Kalle.
(*) Looks like you can simply use VerifyScript with a new signature
checker class. (h/t Nicolas Dorier)
(**) If <prehashed> is true, <message> is the sighash, otherwise
sighash=sha256d(message).
next reply other threads:[~2018-03-14 8:09 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-14 8:09 Karl Johan Alm [this message]
2018-03-14 9:46 ` Kalle Rosenbaum
2018-03-14 16:12 ` Anthony Towns
2018-03-15 3:01 ` Karl Johan Alm
2018-03-15 6:43 ` Jim Posen
2018-03-15 7:25 ` Karl Johan Alm
2018-03-15 20:53 ` Jim Posen
2018-03-14 12:36 ` Luke Dashjr
2018-03-15 7:36 ` Karl Johan Alm
2018-03-15 14:14 ` Luke Dashjr
2018-03-16 0:38 ` Karl Johan Alm
2018-03-16 1:59 ` Greg Sanders
2018-03-16 2:04 ` Karl Johan Alm
2018-03-15 10:15 ` Damian Williamson
2018-03-26 8:53 ` Pieter Wuille
2018-03-27 8:09 ` Karl Johan Alm
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