Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 592F92C for ; Mon, 2 Jan 2017 21:39:27 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-it0-f42.google.com (mail-it0-f42.google.com [209.85.214.42]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 09581159 for ; Mon, 2 Jan 2017 21:39:26 +0000 (UTC) Received: by mail-it0-f42.google.com with SMTP id 75so253276529ite.1 for ; Mon, 02 Jan 2017 13:39:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:mime-version:subject:date:references:to:in-reply-to:message-id; bh=U/zJmE9N8F0PHpKxsprvtGvNO92rXY9h5w8V9kpFxG8=; b=tbmjwimP6R6LdBLnSJ5ZaA7B5ZbQADrL384/bg+nsWTCQN/sx0NV5yOkXcis0D6KXw sFnWtLIJvB24OwqhXtF71Zn0czctsD0g83fAIDwSnE/oCsnf6AB9Cz5dDKQN5uRHL4Hb 20nVpKiQWYpmCNXuAVUG8s3Rn6OKClgwAm8WA7MfX9n66xxK5+SCT1eDQQy+6uGJAQtJ BgXd9+klbBl3HAsV5aS7+TogvModKIZHzrTeYyl2lKMCr2HWqsPVjdD2TLtzGKYNO8XT cSAJNSk2xwgdgjo3KXAYAX+zbn+OZFP0q40H3lU5oVK3M0zX8xAb2rEp0wyk/ovEbULa GFsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:mime-version:subject:date:references:to :in-reply-to:message-id; bh=U/zJmE9N8F0PHpKxsprvtGvNO92rXY9h5w8V9kpFxG8=; b=S11GqiRl6mGa+OQq6h5ld5hWwY7a8hQOoaKW48zob2VvfB5q4VfDznU56BMG3TVYRM YNtBXW9jbEDsSAx0nEYU2PlWTle2qN4X+bC720SNxYdMEGKmr6tK9JtqVTJM2NXM9c2A k1ftrilOUJi/8VhZbWpOcaMLEqT/KrdphclqR/eKAlB46h+jhuWN+WYVLcBf+AE5QWQF XnVIOPoOp10ypZ1kLHF3AdZ2Ty9PKPU8OHDuPvyeASW+EPZevdedvk4G8zsL5qTHEX2N 4Hn2Mz4oOGNR7T0WJSwK5CzWwe9JQE4ZxGEwl4zshC6iFinPnXkl2Jx3OnRZ3XXOhoJn j3JQ== X-Gm-Message-State: AIkVDXIMG4sCbGscBf3rqi3utf2iuuadQkBbfCArP4DEq1f6iR415+Mw9YDjD/vyXzUk+Q== X-Received: by 10.36.222.133 with SMTP id d127mr42173613itg.2.1483393166274; Mon, 02 Jan 2017 13:39:26 -0800 (PST) Received: from [10.0.1.42] (71-81-80-204.dhcp.stls.mo.charter.com. [71.81.80.204]) by smtp.gmail.com with ESMTPSA id 9sm34000138itv.0.2017.01.02.13.39.25 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 02 Jan 2017 13:39:25 -0800 (PST) From: Steve Davis Content-Type: multipart/alternative; boundary="Apple-Mail=_66CB83FC-3D91-4AF0-B0E3-C60E80E16CD7" Mime-Version: 1.0 (Mac OS X Mail 10.2 \(3259\)) Date: Mon, 2 Jan 2017 15:39:24 -0600 References: To: bitcoin-dev@lists.linuxfoundation.org In-Reply-To: Message-Id: <400152B9-1838-432A-829E-13E4FC54320C@gmail.com> X-Mailer: Apple Mail (2.3259) X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, FREEMAIL_FROM, HTML_MESSAGE, RCVD_IN_DNSWL_NONE, RCVD_IN_SORBS_SPAM autolearn=no version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org X-Mailman-Approved-At: Mon, 02 Jan 2017 21:55:27 +0000 Subject: [bitcoin-dev] Script Abuse Potential? X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Jan 2017 21:39:27 -0000 --Apple-Mail=_66CB83FC-3D91-4AF0-B0E3-C60E80E16CD7 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Hi all, Suppose someone were to use the following pk_script: [op_2dup, op_2dup, op_2dup, op_2dup, op_2dup, ...(to limit)..., op_2dup, = op_hash160, , op_equalverify, op_checksig] This still seems to be valid AFAICS, and may be a potential attack = vector? Thanks. --Apple-Mail=_66CB83FC-3D91-4AF0-B0E3-C60E80E16CD7 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii
Hi all,

Suppose someone were to use the following = pk_script:

[op_2dup, = op_2dup, op_2dup, op_2dup, op_2dup, ...(to limit)..., = op_2dup, op_hash160, <addr_hash>, op_equalverify, = op_checksig]

This still seems to be valid AFAICS, and may be a potential = attack vector?

Thanks.

= --Apple-Mail=_66CB83FC-3D91-4AF0-B0E3-C60E80E16CD7--