From patchwork Fri Jun 19 17:56:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "brian m. carlson" X-Patchwork-Id: 11614849 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 73FAF13A0 for ; Fri, 19 Jun 2020 17:57:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5BB4520776 for ; Fri, 19 Jun 2020 17:57:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (3072-bit key) header.d=crustytoothpaste.net header.i=@crustytoothpaste.net header.b="nON9jFYG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404868AbgFSR50 (ORCPT ); Fri, 19 Jun 2020 13:57:26 -0400 Received: from injection.crustytoothpaste.net ([192.241.140.119]:39572 "EHLO injection.crustytoothpaste.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404667AbgFSR4p (ORCPT ); Fri, 19 Jun 2020 13:56:45 -0400 Received: from camp.crustytoothpaste.net (unknown [IPv6:2001:470:b978:101:7d4e:cde:7c41:71c2]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (No client certificate requested) by injection.crustytoothpaste.net (Postfix) with ESMTPSA id 2908360A7F; Fri, 19 Jun 2020 17:56:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=crustytoothpaste.net; s=default; t=1592589395; bh=n4cOXLIJFJySsqXcnB6iIuq2selM+4nlbmqMC5jy41g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From:Reply-To: Subject:Date:To:CC:Resent-Date:Resent-From:Resent-To:Resent-Cc: In-Reply-To:References:Content-Type:Content-Disposition; b=nON9jFYGQFy2ptGg6hEj1zKlQhDDpIOq45e1o/LB5tfRWlPydPCLHDwi4wx8BYZB2 fNLjGfH6li6S5VulqM6QXfc7lbSHNPc+vWdWb5vaQaPY1sYe+3sD/cYpJUO4g6jyUA 1wpph0PVfuD4OmUa4oTQAqlfdVBV3B16BYSF8sqV6J5nXrspiTK2Qm46wCe6zfiGU+ Nwr3J+h0E7vCY+cWu2zIx9heNuEYdHughfAwOxRwuwTgGQwXmfz7SYUAVeEoCIrhia fN7/E4YMbsIq9ECgpo8fAdvPF4FaIul36VBr3y/8P2HI+LRNwnd0a2R+40+SyRUx6g 11a/W7iPkexCmm59/33DldZTRpG4IycP6/bGRvDHWpUp69KXHSpZSpt/HP4BcbNKtZ EfUYdruvfrCICxmH4c4iKX2ktDe8VLyuCFkMxFo+v5cMzn1u3sSPNmASwmiGN/ihsI IDFtP19m5kEBm/Oqrs8rbu4Imz6SYlqX1c+aC6EPNS/EgZ0iePG From: "brian m. carlson" To: Cc: Junio C Hamano , =?utf-8?q?Martin_=C3=85gren?= Subject: [PATCH v3 43/44] bundle: detect hash algorithm when reading refs Date: Fri, 19 Jun 2020 17:56:00 +0000 Message-Id: <20200619175601.569856-44-sandals@crustytoothpaste.net> X-Mailer: git-send-email 2.27.0.278.ge193c7cf3a9 In-Reply-To: <20200619175601.569856-1-sandals@crustytoothpaste.net> References: <20200513005424.81369-1-sandals@crustytoothpaste.net> <20200619175601.569856-1-sandals@crustytoothpaste.net> MIME-Version: 1.0 Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Much like with the dumb HTTP transport, there isn't a way to explicitly specify the hash algorithm when dealing with a bundle, so detect the algorithm based on the length of the object IDs in the prerequisites and ref advertisements. Signed-off-by: brian m. carlson --- bundle.c | 22 +++++++++++++++++++++- bundle.h | 1 + transport.c | 10 ++++++++-- 3 files changed, 30 insertions(+), 3 deletions(-) diff --git a/bundle.c b/bundle.c index 99439e07a1..2a0d744d3f 100644 --- a/bundle.c +++ b/bundle.c @@ -23,6 +23,17 @@ static void add_to_ref_list(const struct object_id *oid, const char *name, list->nr++; } +static const struct git_hash_algo *detect_hash_algo(struct strbuf *buf) +{ + size_t len = strcspn(buf->buf, " \n"); + int algo; + + algo = hash_algo_by_length(len / 2); + if (algo == GIT_HASH_UNKNOWN) + return NULL; + return &hash_algos[algo]; +} + static int parse_bundle_header(int fd, struct bundle_header *header, const char *report_path) { @@ -52,12 +63,21 @@ static int parse_bundle_header(int fd, struct bundle_header *header, } strbuf_rtrim(&buf); + if (!header->hash_algo) { + header->hash_algo = detect_hash_algo(&buf); + if (!header->hash_algo) { + error(_("unknown hash algorithm length")); + status = -1; + break; + } + } + /* * Tip lines have object name, SP, and refname. * Prerequisites have object name that is optionally * followed by SP and subject line. */ - if (parse_oid_hex(buf.buf, &oid, &p) || + if (parse_oid_hex_algop(buf.buf, &oid, &p, header->hash_algo) || (*p && !isspace(*p)) || (!is_prereq && !*p)) { if (report_path) diff --git a/bundle.h b/bundle.h index ceab0c7475..2dc9442024 100644 --- a/bundle.h +++ b/bundle.h @@ -15,6 +15,7 @@ struct ref_list { struct bundle_header { struct ref_list prerequisites; struct ref_list references; + const struct git_hash_algo *hash_algo; }; int is_bundle(const char *path, int quiet); diff --git a/transport.c b/transport.c index a016f41702..b255f123c0 100644 --- a/transport.c +++ b/transport.c @@ -143,6 +143,9 @@ static struct ref *get_refs_from_bundle(struct transport *transport, data->fd = read_bundle_header(transport->url, &data->header); if (data->fd < 0) die(_("could not read bundle '%s'"), transport->url); + + transport->hash_algo = data->header.hash_algo; + for (i = 0; i < data->header.references.nr; i++) { struct ref_list_entry *e = data->header.references.list + i; struct ref *ref = alloc_ref(e->name); @@ -157,11 +160,14 @@ static int fetch_refs_from_bundle(struct transport *transport, int nr_heads, struct ref **to_fetch) { struct bundle_transport_data *data = transport->data; + int ret; if (!data->get_refs_from_bundle_called) get_refs_from_bundle(transport, 0, NULL); - return unbundle(the_repository, &data->header, data->fd, - transport->progress ? BUNDLE_VERBOSE : 0); + ret = unbundle(the_repository, &data->header, data->fd, + transport->progress ? BUNDLE_VERBOSE : 0); + transport->hash_algo = data->header.hash_algo; + return ret; } static int close_bundle(struct transport *transport)