From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by dcvr.yhbt.net (Postfix) with ESMTP id F1B6A1F934 for ; Mon, 18 Jan 2021 23:52:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390244AbhARXv1 (ORCPT ); Mon, 18 Jan 2021 18:51:27 -0500 Received: from injection.crustytoothpaste.net ([192.241.140.119]:55920 "EHLO injection.crustytoothpaste.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389310AbhARXvW (ORCPT ); Mon, 18 Jan 2021 18:51:22 -0500 Received: from camp.crustytoothpaste.net (castro.crustytoothpaste.net [75.10.60.170]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (No client certificate requested) by injection.crustytoothpaste.net (Postfix) with ESMTPSA id 4A4086080E; Mon, 18 Jan 2021 23:50:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=crustytoothpaste.net; s=default; t=1611013810; bh=p2YFF5bzcl9Azh40Ne8B8/U2E5WlWLEohVXeK7uMOPQ=; 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=rzqaIaQI8iq6n9q23qOl1T8jzj3dvbR7wvngfs0bE/2Fv92t8wOokEJ4IIHs1wJvE jXeZ5l0+cNFJEX26amQeoMb7riwjoR68He3UogUBIEDzb4oBYUiREIQMDwZWY9eAgA 5rqxfp+nhq/Dn6mkHuUca1fxHET8eU2YZIejyScColx8Seqe2kuMLQpf+GHJgMCQP5 ze7GVLBg4aMwPyHKkw5H3Jp0m+YqLYhKkk9/z1CHoiWmzjt4m7HaCkS/X5zkGORmEr jWvwdc05YuLXcuWRXqsvYcopTfxazuChpwdBykDtCH5Y3Q+Dq9W5VGBTaCoYH/hDug YRHNZMl+/uSRksr3VFqUp6rJIvXQsczNeXKKrb3zUC5htxIcb9E7xfA9TB0keTT5Od OCB4bJjnLwcXuVgbzItGroCkWZ55WipBaxZRxjtRotaVOFiy+VgLn2XF2heMbSgJPr xyhg+x2rkXIrieZbaHaAwWZVf0aRqgtE5Z3gV2sB3J5J3YxRU0A From: "brian m. carlson" To: Cc: =?UTF-8?q?SZEDER=20G=C3=A1bor?= Subject: [PATCH v3 4/6] commit: allow parsing arbitrary buffers with headers Date: Mon, 18 Jan 2021 23:49:13 +0000 Message-Id: <20210118234915.2036197-5-sandals@crustytoothpaste.net> X-Mailer: git-send-email 2.30.0.284.gd98b1dd5eaa7 In-Reply-To: <20210118234915.2036197-1-sandals@crustytoothpaste.net> References: <20210111035840.2437737-1-sandals@crustytoothpaste.net> <20210118234915.2036197-1-sandals@crustytoothpaste.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Currently only commits are signed with headers. However, in the future, we'll also sign tags with headers as well. Let's refactor out a function called parse_buffer_signed_by_header which does exactly that. In addition, since we'll want to sign things other than commits this way, let's call the function sign_with_header instead of do_sign_commit. Signed-off-by: brian m. carlson --- commit.c | 20 ++++++++++++++++---- commit.h | 9 +++++++++ 2 files changed, 25 insertions(+), 4 deletions(-) diff --git a/commit.c b/commit.c index ccb912b9b5..2c57b6ded9 100644 --- a/commit.c +++ b/commit.c @@ -995,7 +995,7 @@ static const char *gpg_sig_headers[] = { "gpgsig-sha256", }; -static int do_sign_commit(struct strbuf *buf, const char *keyid) +int sign_with_header(struct strbuf *buf, const char *keyid) { struct strbuf sig = STRBUF_INIT; int inspos, copypos; @@ -1035,13 +1035,26 @@ static int do_sign_commit(struct strbuf *buf, const char *keyid) return 0; } + + int parse_signed_commit(const struct commit *commit, struct strbuf *payload, struct strbuf *signature, const struct git_hash_algo *algop) { - unsigned long size; const char *buffer = get_commit_buffer(commit, &size); + int ret = parse_buffer_signed_by_header(buffer, size, payload, signature, algop); + + unuse_commit_buffer(commit, buffer); + return ret; +} + +int parse_buffer_signed_by_header(const char *buffer, + unsigned long size, + struct strbuf *payload, + struct strbuf *signature, + const struct git_hash_algo *algop) +{ int in_signature = 0, saw_signature = 0, other_signature = 0; const char *line, *tail, *p; const char *gpg_sig_header = gpg_sig_headers[hash_algo_by_ptr(algop)]; @@ -1078,7 +1091,6 @@ int parse_signed_commit(const struct commit *commit, } line = next; } - unuse_commit_buffer(commit, buffer); return saw_signature; } @@ -1532,7 +1544,7 @@ int commit_tree_extended(const char *msg, size_t msg_len, if (encoding_is_utf8 && !verify_utf8(&buffer)) fprintf(stderr, _(commit_utf8_warn)); - if (sign_commit && do_sign_commit(&buffer, sign_commit)) { + if (sign_commit && sign_with_header(&buffer, sign_commit)) { result = -1; goto out; } diff --git a/commit.h b/commit.h index 030aa65ab8..e2856ce8ef 100644 --- a/commit.h +++ b/commit.h @@ -360,4 +360,13 @@ int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void LAST_ARG_MUST_BE_NULL int run_commit_hook(int editor_is_used, const char *index_file, const char *name, ...); +/* Sign a commit or tag buffer, storing the result in a header. */ +int sign_with_header(struct strbuf *buf, const char *keyid); +/* Parse the signature out of a header. */ +int parse_buffer_signed_by_header(const char *buffer, + unsigned long size, + struct strbuf *payload, + struct strbuf *signature, + const struct git_hash_algo *algop); + #endif /* COMMIT_H */