From patchwork Sun Aug 18 16:57:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 13767484 Received: from frasgout11.his.huawei.com (frasgout11.his.huawei.com [14.137.139.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1E5C414F9F9; Sun, 18 Aug 2024 17:00:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=14.137.139.23 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724000421; cv=none; b=MDzILWMPoCptwaQGj8taKMt0ozU/+6kroddqLGKzWEM+7C7VH3OQOatn2X11s7VZRwxbHd12Gz7JzpoIis3+WPWM9R6uzVTqTzk+4MIOIAeHNaj5BtMEDUmWNZ37k8YBdva+QLZS3SoemG4BppJkys3h7yQmMduf0uwGrGoJebM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724000421; c=relaxed/simple; bh=Nj+yAp93mMTonsRpkK/C+G3J8ISXkzla6f95gorlhUY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=nruuxqg/FE0jaB26R3qaTPYHLETARahwGKjyVhQOohh6I5BNe9JClLr5F0FOPIzqVDdHvvKpvaydTJfT1EOxsQjkOYCE6/5Cazi2n6P15hOE4FCze3V4PLt8qwXlF2NDBcS4Ax+/+tOmDq4ZQiSA9zZyvrekYFAbSE0sDSXspRQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=14.137.139.23 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.18.186.29]) by frasgout11.his.huawei.com (SkyGuard) with ESMTP id 4Wn1hF1L1fz9v7Hm; Mon, 19 Aug 2024 00:41:17 +0800 (CST) Received: from mail02.huawei.com (unknown [7.182.16.47]) by mail.maildlp.com (Postfix) with ESMTP id 56DE9140380; Mon, 19 Aug 2024 01:00:12 +0800 (CST) Received: from huaweicloud.com (unknown [10.204.63.22]) by APP1 (Coremail) with SMTP id LxC2BwAXm4VpKMJm+zZxAQ--.21009S9; Sun, 18 Aug 2024 18:00:11 +0100 (CET) From: Roberto Sassu To: dhowells@redhat.com, dwmw2@infradead.org, herbert@gondor.apana.org.au, davem@davemloft.net Cc: linux-kernel@vger.kernel.org, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, zohar@linux.ibm.com, linux-integrity@vger.kernel.org, Roberto Sassu Subject: [PATCH v2 07/14] KEYS: Provide PGP key description autogeneration Date: Sun, 18 Aug 2024 18:57:49 +0200 Message-Id: <20240818165756.629203-8-roberto.sassu@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240818165756.629203-1-roberto.sassu@huaweicloud.com> References: <20240818165756.629203-1-roberto.sassu@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: LxC2BwAXm4VpKMJm+zZxAQ--.21009S9 X-Coremail-Antispam: 1UD129KBjvJXoWxGFWfCF4fKF4rKFy7Cr1DGFg_yoW5Zry3pa 15G3y5KFWrGr1fta9xGr4xG3sYyFWxJFWfK3ySvw1a9wsIqr109rWSyF1Yg3WayFn5Jryf KFWqva4Yyr1DArDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPqb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv67AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIEc7CjxVAF wI0_Gr1j6F4UJwAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I 80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCj c4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4IIrI8v6xkF7I0E8cxan2IY04v7MxkF7I0En4 kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E 5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtV W8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1I6r4UMIIF0xvE2Ix0cI8IcVCY 1x0267AKxVWxJVW8Jr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14 v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x 07UZTmfUUUUU= X-CM-SenderInfo: purev21wro2thvvxqx5xdzvxpfor3voofrz/1tbiAgATBGbBWPgB6wABs5 From: David Howells Provide a facility to autogenerate the name of PGP keys from the contents of the payload. If add_key() is given a blank description, a description is constructed from the last user ID packet in the payload data plus the last 8 hex digits of the key ID. For instance: keyctl padd asymmetric "" @s Co-developed-by: Roberto Sassu Signed-off-by: Roberto Sassu --- crypto/asymmetric_keys/pgp_public_key.c | 47 ++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/crypto/asymmetric_keys/pgp_public_key.c b/crypto/asymmetric_keys/pgp_public_key.c index cb399f5cdd3e..e7f74d513a9e 100644 --- a/crypto/asymmetric_keys/pgp_public_key.c +++ b/crypto/asymmetric_keys/pgp_public_key.c @@ -59,6 +59,8 @@ struct pgp_key_data_parse_context { struct public_key *pub; u8 raw_fingerprint[HASH_MAX_DIGESTSIZE]; size_t raw_fingerprint_len; + const char *user_id; + size_t user_id_len; }; /* @@ -210,6 +212,15 @@ static int pgp_process_public_key(struct pgp_parse_context *context, kenter(",%u,%u,,%zu", type, headerlen, datalen); + if (type == PGP_PKT_USER_ID) { + if (!ctx->user_id_len) { + ctx->user_id = data; + ctx->user_id_len = datalen; + } + kleave(" = 0 [user ID]"); + return 0; + } + if (ctx->raw_fingerprint_len) { kleave(" = -ENOKEY [already]"); return -EBADMSG; @@ -317,7 +328,8 @@ static int pgp_key_parse(struct key_preparsed_payload *prep) kenter(""); memset(&ctx, 0, sizeof(ctx)); - ctx.pgp.types_of_interest = (1 << PGP_PKT_PUBLIC_KEY); + ctx.pgp.types_of_interest = (1 << PGP_PKT_PUBLIC_KEY) | + (1 << PGP_PKT_USER_ID); ctx.pgp.process_packet = pgp_process_public_key; ret = pgp_parse_packets(prep->data, prep->datalen, &ctx.pgp); @@ -330,6 +342,39 @@ static int pgp_key_parse(struct key_preparsed_payload *prep) goto error; } + if (ctx.user_id && ctx.user_id_len > 0) { + /* + * Propose a description for the key (user ID without the + * comment). + */ + size_t ulen = ctx.user_id_len; + const char *p; + + p = memchr(ctx.user_id, '(', ulen); + if (p) { + /* Remove the comment */ + do { + p--; + } while (*p == ' ' && p > ctx.user_id); + if (*p != ' ') + p++; + ulen = p - ctx.user_id; + } + + if (ulen > 255 - 9) + ulen = 255 - 9; + prep->description = kmalloc(ulen + 1 + 8 + 1, GFP_KERNEL); + ret = -ENOMEM; + if (!prep->description) + goto error; + memcpy(prep->description, ctx.user_id, ulen); + prep->description[ulen] = ' '; + bin2hex(prep->description + ulen + 1, + ctx.raw_fingerprint + ctx.raw_fingerprint_len - 4, 4); + prep->description[ulen + 9] = 0; + pr_debug("desc '%s'\n", prep->description); + } + /* We're pinning the module by being linked against it */ __module_get(public_key_subtype.owner); prep->payload.data[asym_subtype] = &public_key_subtype;