1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* PKCS#7 crypto data parser internal definitions
3  *
4  * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
5  * Written by David Howells (dhowells@redhat.com)
6  */
7 
8 #include <linux/oid_registry.h>
9 #include <crypto/pkcs7.h>
10 #include "x509_parser.h"
11 
12 #define kenter(FMT, ...) \
13 	pr_devel("==> %s("FMT")\n", __func__, ##__VA_ARGS__)
14 #define kleave(FMT, ...) \
15 	pr_devel("<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
16 
17 struct pkcs7_signed_info {
18 	struct pkcs7_signed_info *next;
19 	struct x509_certificate *signer; /* Signing certificate (in msg->certs) */
20 	unsigned	index;
21 	bool		unsupported_crypto;	/* T if not usable due to missing crypto */
22 	bool		blacklisted;
23 
24 	/* Message digest - the digest of the Content Data (or NULL) */
25 	const void	*msgdigest;
26 	unsigned	msgdigest_len;
27 
28 	/* Authenticated Attribute data (or NULL) */
29 	unsigned	authattrs_len;
30 	const void	*authattrs;
31 	unsigned long	aa_set;
32 #define	sinfo_has_content_type		0
33 #define	sinfo_has_signing_time		1
34 #define	sinfo_has_message_digest	2
35 #define sinfo_has_smime_caps		3
36 #define	sinfo_has_ms_opus_info		4
37 #define	sinfo_has_ms_statement_type	5
38 	time64_t	signing_time;
39 
40 	/* Message signature.
41 	 *
42 	 * This contains the generated digest of _either_ the Content Data or
43 	 * the Authenticated Attributes [RFC2315 9.3].  If the latter, one of
44 	 * the attributes contains the digest of the the Content Data within
45 	 * it.
46 	 *
47 	 * THis also contains the issuing cert serial number and issuer's name
48 	 * [PKCS#7 or CMS ver 1] or issuing cert's SKID [CMS ver 3].
49 	 */
50 	struct public_key_signature *sig;
51 };
52 
53 struct pkcs7_message {
54 	struct x509_certificate *certs;	/* Certificate list */
55 	struct x509_certificate *crl;	/* Revocation list */
56 	struct pkcs7_signed_info *signed_infos;
57 	u8		version;	/* Version of cert (1 -> PKCS#7 or CMS; 3 -> CMS) */
58 	bool		have_authattrs;	/* T if have authattrs */
59 
60 	/* Content Data (or NULL) */
61 	enum OID	data_type;	/* Type of Data */
62 	size_t		data_len;	/* Length of Data */
63 	size_t		data_hdrlen;	/* Length of Data ASN.1 header */
64 	const void	*data;		/* Content Data (or 0) */
65 };
66