cregit-Linux how code gets into the kernel

Release 4.10 crypto/asymmetric_keys/pkcs7_parser.h

/* PKCS#7 crypto data parser internal definitions
 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.

#include <linux/oid_registry.h>
#include <crypto/pkcs7.h>
#include "x509_parser.h"

#define kenter(FMT, ...) \
	pr_devel("==> %s("FMT")\n", __func__, ##__VA_ARGS__)

#define kleave(FMT, ...) \
	pr_devel("<== %s()"FMT"\n", __func__, ##__VA_ARGS__)

struct pkcs7_signed_info {
struct pkcs7_signed_info *next;
struct x509_certificate *signer; /* Signing certificate (in msg->certs) */
unsigned	index;
bool		unsupported_crypto;	/* T if not usable due to missing crypto */

	/* Message digest - the digest of the Content Data (or NULL) */
const void	*msgdigest;
unsigned	msgdigest_len;

	/* Authenticated Attribute data (or NULL) */
unsigned	authattrs_len;
const void	*authattrs;
unsigned long	aa_set;

#define	sinfo_has_content_type		0

#define	sinfo_has_signing_time		1

#define	sinfo_has_message_digest	2

#define sinfo_has_smime_caps		3

#define	sinfo_has_ms_opus_info		4

#define	sinfo_has_ms_statement_type	5
time64_t	signing_time;

	/* Message signature.
         * This contains the generated digest of _either_ the Content Data or
         * the Authenticated Attributes [RFC2315 9.3].  If the latter, one of
         * the attributes contains the digest of the the Content Data within
         * it.
         * THis also contains the issuing cert serial number and issuer's name
         * [PKCS#7 or CMS ver 1] or issuing cert's SKID [CMS ver 3].
struct public_key_signature *sig;

struct pkcs7_message {
struct x509_certificate *certs;	/* Certificate list */
struct x509_certificate *crl;	/* Revocation list */
struct pkcs7_signed_info *signed_infos;
u8		version;	/* Version of cert (1 -> PKCS#7 or CMS; 3 -> CMS) */
bool		have_authattrs;	/* T if have authattrs */

	/* Content Data (or NULL) */
enum OID	data_type;	/* Type of Data */
size_t		data_len;	/* Length of Data */
size_t		data_hdrlen;	/* Length of Data ASN.1 header */
const void	*data;		/* Content Data (or 0) */

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