From patchwork Wed May 13 00:54:23 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: 11544403 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 2272F90 for ; Wed, 13 May 2020 00:55:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09C7A20753 for ; Wed, 13 May 2020 00:55:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (3072-bit key) header.d=crustytoothpaste.net header.i=@crustytoothpaste.net header.b="aA86K8Nd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731982AbgEMAzG (ORCPT ); Tue, 12 May 2020 20:55:06 -0400 Received: from injection.crustytoothpaste.net ([192.241.140.119]:38156 "EHLO injection.crustytoothpaste.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731941AbgEMAy6 (ORCPT ); Tue, 12 May 2020 20:54:58 -0400 Received: from camp.crustytoothpaste.net (unknown [IPv6:2001:470:b978:101:b610:a2f0:36c1:12e3]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (No client certificate requested) by injection.crustytoothpaste.net (Postfix) with ESMTPSA id 3EBD260D12; Wed, 13 May 2020 00:54:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=crustytoothpaste.net; s=default; t=1589331296; bh=VQHK4KZV/HJtohhf/r/fcuDQ02WfP9S43VaRaa73xx8=; 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=aA86K8NdVHzhdOGGKre3xdV4INo4BVBbw1L/BXjyT10R3pIMWJWQ5SZjA8X0xHfWk pSB0JOheoQK3Zw1jCKyzvp3a5GrHS49DOkDhUTthW/i8QgniAl2TUL9HEbBem2DeII yRyQLT3kUcu4PNR3xY690k2VvH7OTccC3tgIyF9UWHiDGUXfPv81Znx2ahIhKUddSA wZQFURZHi3ecXhgg46vljiPVaH64j4Sj/6vy/4b9cPMwLmea5hcYjVkbmpIOQEYDRq 0l9J1E5Hi8MAf8oplPcOvEQqQlotDNG4yjxq8fq7jTzpup+7oxIwKcK+Va+MWDy/V1 YqcH7E8JYYDohO4ZwMYnzR3uHNc7Ygkrn2lRohATDa3Azg7LCi/qah7eq2SQKIik4D U+C9WLhjfx7fIEataehVQiPeVaq/j9ix9UIIXCHtM0Sm5vWBt3Wi85PW7Q2E5Zidgp dy/NpVQLuCEC2BxpO8pG9wp053zoZp0RZqOD9diWmAzyrjnDepT From: "brian m. carlson" To: Cc: Jonathan Tan Subject: [PATCH 43/44] bundle: detect hash algorithm when reading refs Date: Wed, 13 May 2020 00:54:23 +0000 Message-Id: <20200513005424.81369-44-sandals@crustytoothpaste.net> X-Mailer: git-send-email 2.26.2.761.g0e0b3e54be In-Reply-To: <20200513005424.81369-1-sandals@crustytoothpaste.net> References: <20200513005424.81369-1-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 b43d985f90..38a432be69 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)