1 /* PKCS#7 crypto data parser internal definitions
2  *
3  * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
4  * Written by David Howells (dhowells@redhat.com)
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public Licence
8  * as published by the Free Software Foundation; either version
9  * 2 of the Licence, or (at your option) any later version.
10  */
11 
12 #include <linux/oid_registry.h>
13 #include <crypto/pkcs7.h>
14 #include "x509_parser.h"
15 
16 #define kenter(FMT, ...) \
17 	pr_devel("==> %s("FMT")\n", __func__, ##__VA_ARGS__)
18 #define kleave(FMT, ...) \
19 	pr_devel("<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
20 
21 struct pkcs7_signed_info {
22 	struct pkcs7_signed_info *next;
23 	struct x509_certificate *signer; /* Signing certificate (in msg->certs) */
24 	unsigned	index;
25 	bool		trusted;
26 	bool		unsupported_crypto;	/* T if not usable due to missing crypto */
27 
28 	/* Message digest - the digest of the Content Data (or NULL) */
29 	const void	*msgdigest;
30 	unsigned	msgdigest_len;
31 
32 	/* Authenticated Attribute data (or NULL) */
33 	unsigned	authattrs_len;
34 	const void	*authattrs;
35 	unsigned long	aa_set;
36 #define	sinfo_has_content_type		0
37 #define	sinfo_has_signing_time		1
38 #define	sinfo_has_message_digest	2
39 #define sinfo_has_smime_caps		3
40 #define	sinfo_has_ms_opus_info		4
41 #define	sinfo_has_ms_statement_type	5
42 	time64_t	signing_time;
43 
44 	/* Issuing cert serial number and issuer's name [PKCS#7 or CMS ver 1]
45 	 * or issuing cert's SKID [CMS ver 3].
46 	 */
47 	struct asymmetric_key_id *signing_cert_id;
48 
49 	/* Message signature.
50 	 *
51 	 * This contains the generated digest of _either_ the Content Data or
52 	 * the Authenticated Attributes [RFC2315 9.3].  If the latter, one of
53 	 * the attributes contains the digest of the the Content Data within
54 	 * it.
55 	 */
56 	struct public_key_signature sig;
57 };
58 
59 struct pkcs7_message {
60 	struct x509_certificate *certs;	/* Certificate list */
61 	struct x509_certificate *crl;	/* Revocation list */
62 	struct pkcs7_signed_info *signed_infos;
63 	u8		version;	/* Version of cert (1 -> PKCS#7 or CMS; 3 -> CMS) */
64 	bool		have_authattrs;	/* T if have authattrs */
65 
66 	/* Content Data (or NULL) */
67 	enum OID	data_type;	/* Type of Data */
68 	size_t		data_len;	/* Length of Data */
69 	size_t		data_hdrlen;	/* Length of Data ASN.1 header */
70 	const void	*data;		/* Content Data (or 0) */
71 };
72