From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 18 Jun 2024 04:46:34 -0700 Received: from mail-oi1-f191.google.com ([209.85.167.191]) by mail.fairlystable.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1sJXII-0000MD-Bg for bitcoindev@gnusha.org; Tue, 18 Jun 2024 04:46:34 -0700 Received: by mail-oi1-f191.google.com with SMTP id 5614622812f47-3d21b50f896sf5916893b6e.0 for ; Tue, 18 Jun 2024 04:46:34 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1718711188; cv=pass; d=google.com; s=arc-20160816; b=Qa7UXFl8alkg8KqWlxH5tW5VVxTshiCSm9gha8rEaeX9+HWmJoAserKzVXsB3QGkh2 8TG72qs8iM9IqfbVTkep4+1QXRWDoDOwb4tYQVh2F9GHH+c/w0opks47HupyUGPb2rUp 8mm5OG24Yj8ZqWH8J+4YWBzTqW0Spo7J50jLVFkZGX8P5W0/v4bydBuae3nL0MfEU7RW 8cxbb7s+CpWSVUGcCvO5hhHW43XWJOUKapu01ag3qTkzk8WQNzg1xj4QX01iCBk7xoFK Hd3gPzV6IHdwOVC2smY+iQYUz4gbYyBKaw0vJmL16Kj63FfSEetNaYBP9DoAU3e+jHRZ lbhw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:reply-to:mime-version:feedback-id :references:in-reply-to:message-id:subject:cc:from:to:date :dkim-signature; bh=tCoj0DWzJWhK8npUbmp6rwQDlxMtn4WgpPnf/gCQQQ8=; fh=xYYzAI3ae4yHFC3k3qK742uqSeheNLgRyjN+fs99m3E=; b=sGWcX6qnheeIXcxsz53oW46kolb95k6s37W1uF2rIQVk+/FEGvRIQEnVPDy+PZJgrF +3yHygP/GO2F1Q4Ap1XoxMMVaBFvFcMcj43/80gL5h/kvhlud7qWv9G6H/ODSsy/cRnz DjOkJ3FISxbS+kGro/SvNo+lcYnxxN62Gpy+ijAGZ56l9njhlGIaftJilvTtpdP4cwxT wOGUhblfKPChedQNLKogqUOZueCBUDtFrJmFfWp4rASiZHmOMQgkuYSNf+/BfH8WejBI vwOgYkC0jYaRUx49MaMrofVx/wjl8Qh84hMBf6dFfRfVkcLSEzmeyuXn5itXFpOpiKTg tjQA==; darn=gnusha.org ARC-Authentication-Results: i=2; gmr-mx.google.com; dkim=pass header.i=@protonmail.com header.s=protonmail3 header.b=CAvx4AVQ; spf=pass (google.com: domain of darosior@protonmail.com designates 185.70.43.167 as permitted sender) smtp.mailfrom=darosior@protonmail.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=protonmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlegroups.com; s=20230601; t=1718711188; x=1719315988; darn=gnusha.org; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:reply-to :x-original-authentication-results:x-original-sender:mime-version :feedback-id:references:in-reply-to:message-id:subject:cc:from:to :date:from:to:cc:subject:date:message-id:reply-to; bh=tCoj0DWzJWhK8npUbmp6rwQDlxMtn4WgpPnf/gCQQQ8=; b=H/CLNzDVYMQfzYjhNcCcWk3WjT3vyHGHmLXNG8+p2Pq5Hk7u3TxiSWw1/GxU8vW7vD D+ZZqCRttfQui9Xr2G3SYE8tUSNsBkuQDbM8UJ3hc2Ef0ejgTNV7LgDSMNqPomqXV+tJ H3uySs5CsXWyU861JjLD2vd4opSF2s1IRDNzbCT5Wr15lspjN0x7p2tkHxDP1o4KyG1Q BBpPBhTmhex3U8SJwVUTZHMuuACGJwhA4bIQsBD4TS8nWcIVNPLnmbWPPX/HHF8dbvEE n0iGVamlCqlUFMZgpPz4xzKKu4LJsADiVvLggzd4qnbTf1evbQLNtVZlJSYHpfX+2Po1 1+FQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718711188; x=1719315988; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:reply-to :x-original-authentication-results:x-original-sender:mime-version :feedback-id:references:in-reply-to:message-id:subject:cc:from:to :date:x-beenthere:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=tCoj0DWzJWhK8npUbmp6rwQDlxMtn4WgpPnf/gCQQQ8=; b=SBURoUy0MgKwAbqVfvn5iGlH0dWoSl0iIC8mw+WUYB0D3rXqM+tttQBS0TOBXX3Xig t5PNqxN8m1T6v8epnGmW7pWiZkZyoQEX1mWLwPMyKlH0gcxtuhVm+0X4fNNMKJrTmlZR 9KBTI0BvkK/5zrnuy5I49/mp/wi2HT7rwjaSIlebd5FBqYxmva9WnZmkY8XkUFxFooDn VnSJZ+jbhGDFDvyrKa68p/HyOWX38+fx3H4yeuHjNOOTJmwfq/6DALbpK3fYCmo5iQ+Z OAlGiV+gnvPaI3zAR6Todevhu1zN2dKiKEQxFpxTeBfjn7K6qCLwgyBPHV//M9pdcIKQ LyeQ== X-Forwarded-Encrypted: i=2; AJvYcCUKqfuG81vkNHaNU6iRXBASJ+ivVwaC7C/6N7Yh0o7VdlyEp0LY5RSDoRpABNeX7nFENzUWFW2IUyxvmNmaHRbeBww+YLo= X-Gm-Message-State: AOJu0YxyKUBrd32FwLPZeLUmlTX/WyzfqYtkbiiRAip2+MmFxYqO7QJW tkoZrXmbSDl6up+U2B15D2nEP6/0iuO7YQpAGsinR89+DqAySzNS X-Google-Smtp-Source: AGHT+IGX6hdi3nq+Tgt2NyqN9YGJMJEQZttmO05GuVMpe9YnVnopIsw2SJ0QtLAfYQSbebD6I+tvHA== X-Received: by 2002:a05:6808:178e:b0:3d2:277e:45e3 with SMTP id 5614622812f47-3d24e8ce5a3mr13986686b6e.13.1718711187855; Tue, 18 Jun 2024 04:46:27 -0700 (PDT) X-BeenThere: bitcoindev@googlegroups.com Received: by 2002:ac8:5915:0:b0:440:a6ed:f91e with SMTP id d75a77b69052e-4417ac22a0cls76528231cf.1.-pod-prod-04-us; Tue, 18 Jun 2024 04:46:26 -0700 (PDT) X-Received: by 2002:a05:620a:4051:b0:797:de98:1437 with SMTP id af79cd13be357-798d269438cmr54336685a.13.1718711186357; Tue, 18 Jun 2024 04:46:26 -0700 (PDT) Received: by 2002:a05:620a:7282:b0:795:48dd:de1d with SMTP id af79cd13be357-79ba84019a0ms85a; Tue, 18 Jun 2024 01:13:51 -0700 (PDT) X-Received: by 2002:a05:600c:4ec8:b0:421:c932:f5e1 with SMTP id 5b1f17b1804b1-42304823318mr103841565e9.2.1718698429538; Tue, 18 Jun 2024 01:13:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1718698429; cv=none; d=google.com; s=arc-20160816; b=ujFjP8ed5CFY2FYwXxPViAP5uGS98rdvUXiwnsg5oMRKM0/Mp1dE7mYgMiVniLFuAa Yxu/PeZD6JAy37xjlLvIN/z51vS3aU3NqaIdQVaIjoEreqOzSPb3Y9qyk8/2TTxyUYHf 58EXLgcBy2nhJ4nvnnQwSnGAy6A9H/tulsXUMeW1HGhbAj2zkbqoLVR85EQOyLY5wbqP quCAZglj2OVzJ10Pa1MFqTQut+SPWZqxw9iaEbhciv3j1zHQkP/8404nBNhmXLAX3YgQ Tq0HmGP1ieKeJ/FWiwBrqFjb/D9f4oKfiDKFfwYV0HAA+Hxmg/gp2954OCSoXNOMHwsP BO3A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:feedback-id:references:in-reply-to:message-id:subject :cc:from:to:date:dkim-signature; bh=gjDBQgKEl7mxTqH+tMjQUs3F5IVlte0NeQs7lYH6SPc=; fh=VUyRMGDsLDyKXHBc8DWjokFBiSMTvXavinKdBJZhUls=; b=Kh7C52IZcXDUvZ/Ih1ya2zrRbCro9HRXvA75g9/c+OLGENud8Fg4B8H+bF+G+cNrj1 ajs7TN8JUCeN1j66vPibPIwnlvkMx/gXMa+omm43kabyL/WUJXLEAUpLC0ck6hyJ2hn1 55CsjCZqYykDl3/5cmyAwEeKKL/vgzi6sjxz1npp6rAVQ77biW701CDaesrp26kJ3yi/ OGDzUD+a1MXijLM8UsIvwN9BYGaIqP5jQJURFOmQ/+0jsId6htpXR/93iqGSnRd2sVda RdFjbjQ3MdFV4YrD0/WD3M9uLN6vBn8sZys6cBQ8YPfhmami4ohDjcSQ02hZT5LeTdpR Dxjw==; dara=google.com ARC-Authentication-Results: i=1; gmr-mx.google.com; dkim=pass header.i=@protonmail.com header.s=protonmail3 header.b=CAvx4AVQ; spf=pass (google.com: domain of darosior@protonmail.com designates 185.70.43.167 as permitted sender) smtp.mailfrom=darosior@protonmail.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=protonmail.com Received: from mail-43167.protonmail.ch (mail-43167.protonmail.ch. [185.70.43.167]) by gmr-mx.google.com with ESMTPS id 5b1f17b1804b1-42300f54a31si2731885e9.2.2024.06.18.01.13.49 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Jun 2024 01:13:49 -0700 (PDT) Received-SPF: pass (google.com: domain of darosior@protonmail.com designates 185.70.43.167 as permitted sender) client-ip=185.70.43.167; Date: Tue, 18 Jun 2024 08:13:44 +0000 To: Eric Voskuil From: "'Antoine Poinsot' via Bitcoin Development Mailing List" Cc: Bitcoin Development Mailing List Subject: Re: [bitcoindev] Re: Great Consensus Cleanup Revival Message-ID: In-Reply-To: <72e83c31-408f-4c13-bff5-bf0789302e23n@googlegroups.com> References: <72e83c31-408f-4c13-bff5-bf0789302e23n@googlegroups.com> Feedback-ID: 7060259:user:proton X-Pm-Message-ID: 26b8ce5df15dd67567aa011e29f10c68ffa1d558 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="b1_7ZstBLrbDOiDQNkGaD5e34Z7R11hdS9N6eDIC7GyxqU" X-Original-Sender: darosior@protonmail.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@protonmail.com header.s=protonmail3 header.b=CAvx4AVQ; spf=pass (google.com: domain of darosior@protonmail.com designates 185.70.43.167 as permitted sender) smtp.mailfrom=darosior@protonmail.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=protonmail.com X-Original-From: Antoine Poinsot Reply-To: Antoine Poinsot Precedence: list Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com List-ID: X-Google-Group-Id: 786775582512 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Score: -1.0 (-) This is a multi-part message in MIME format. --b1_7ZstBLrbDOiDQNkGaD5e34Z7R11hdS9N6eDIC7GyxqU Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Eric, It is. This is what is implemented in Bitcoin Core, see [this snippet](http= s://github.com/bitcoin/bitcoin/blob/41544b8f96dbc9c6b8998acd6522200d67cdc16= d/src/validation.cpp#L4547-L4552) and section 4.1 of the document you refer= ence: > Another check that was also being done in CheckBlock() relates to the coi= nbase transaction: if the first transaction in a block fails the required s= tructure of a coinbase =E2=80=93 one input, with previous output hash of al= l zeros and index of all ones =E2=80=93 then the block will fail validation= . The side effect of this test being in CheckBlock() was that even though t= he block malleability discussed in section 3.1 was unknown, we were effecti= vely protected against it =E2=80=93 as described above, it would take at le= ast 224 bits of work to produce a malleated block that passed the coinbase = check. Best, Antoine On Tuesday, June 18th, 2024 at 12:15 AM, Eric Voskuil wr= ote: > Hi Antoine, > > Regarding potential malleability pertaining to blocks with only 64 byte t= ransactions, why is not a deserialization phase check for the coinbase inpu= t as a null point not sufficient mitigation (computational infeasibility) f= or any implementation that desires to perform permanent invalidity marking? > > Best, > Eric > > ref: [Weaknesses in Bitcoin=E2=80=99s Merkle Root Construction](https://l= ists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20190225/a27d883= 7/attachment-0001.pdf) > > -- > You received this message because you are subscribed to the Google Groups= "Bitcoin Development Mailing List" group. > To unsubscribe from this group and stop receiving emails from it, send an= email to bitcoindev+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgi= d/bitcoindev/72e83c31-408f-4c13-bff5-bf0789302e23n%40googlegroups.com. --=20 You received this message because you are subscribed to the Google Groups "= Bitcoin Development Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoindev+unsubscribe@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/= bitcoindev/heKH68GFJr4Zuf6lBozPJrb-StyBJPMNvmZL0xvKFBnBGVA3fVSgTLdWc-_8igYW= X8z3zCGvzflH-CsRv0QCJQcfwizNyYXlBJa_Kteb2zg%3D%40protonmail.com. --b1_7ZstBLrbDOiDQNkGaD5e34Z7R11hdS9N6eDIC7GyxqU Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Eric,

It is. This is what is implemented in Bitcoin Core, see <= a href=3D"https://github.com/bitcoin/bitcoin/blob/41544b8f96dbc9c6b8998acd6= 522200d67cdc16d/src/validation.cpp#L4547-L4552" title=3D"this snippet">this= snippet and section 4.1 of the document you reference:
Another check that was also being d= one in CheckBlock() relates to the coinbase transaction: if th= e first transaction in a block fails the required structure of= a coinbase =E2=80=93 one input, with previous output hash of = all zeros and index of all ones =E2=80=93 then the block will fail validati= on. The side effect of this test being in CheckBlock() was tha= t even though the block malleability discussed in section 3.1 = was unknown, we were effectively protected against it =E2=80= =93 as described above, it would take at least 224 bits of work to produce<= /span> a malleated block that passed the coinbase check.

=
Best,
Antoine
On Tuesday, June 18th, 2024 at 12:15 AM, Eric Voskuil <eric@vosk= uil.org> wrote:
Hi Antoine,

Regarding potential malleability pertaining = to blocks with only 64 byte transactions, why is not a deserialization phas= e check for the coinbase input as a null point not sufficient mitigation (c= omputational infeasibility) for any implementation that desires to perform = permanent invalidity marking?

Best,
Eric

--
You received this message because you are subscribed to the Google Groups "= Bitcoin Development Mailing List" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoindev+unsubscribe@googl= egroups.com.
To view this discussion on the web visit https://groups.= google.com/d/msgid/bitcoindev/72e83c31-408f-4c13-bff5-bf0789302e23n%40googl= egroups.com.

--
You received this message because you are subscribed to the Google Groups &= quot;Bitcoin Development Mailing List" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoind= ev+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/b= itcoindev/heKH68GFJr4Zuf6lBozPJrb-StyBJPMNvmZL0xvKFBnBGVA3fVSgTLdWc-_8igYWX= 8z3zCGvzflH-CsRv0QCJQcfwizNyYXlBJa_Kteb2zg%3D%40protonmail.com.
--b1_7ZstBLrbDOiDQNkGaD5e34Z7R11hdS9N6eDIC7GyxqU--