/*
 * fscrypt_private.h
 *
 * Copyright (C) 2015, Google, Inc.
 *
 * This contains encryption key functions.
 *
 * Written by Michael Halcrow, Ildar Muslukhov, and Uday Savagaonkar, 2015.
 */

#ifndef _FSCRYPT_PRIVATE_H
#define _FSCRYPT_PRIVATE_H

#include <linux/fscrypto.h>

#define FS_FNAME_CRYPTO_DIGEST_SIZE	32

/* Encryption parameters */
#define FS_XTS_TWEAK_SIZE		16
#define FS_AES_128_ECB_KEY_SIZE		16
#define FS_AES_256_GCM_KEY_SIZE		32
#define FS_AES_256_CBC_KEY_SIZE		32
#define FS_AES_256_CTS_KEY_SIZE		32
#define FS_AES_256_XTS_KEY_SIZE		64
#define FS_MAX_KEY_SIZE			64

#define FS_KEY_DESC_PREFIX		"fscrypt:"
#define FS_KEY_DESC_PREFIX_SIZE		8

#define FS_KEY_DERIVATION_NONCE_SIZE		16

/**
 * Encryption context for inode
 *
 * Protector format:
 *  1 byte: Protector format (1 = this version)
 *  1 byte: File contents encryption mode
 *  1 byte: File names encryption mode
 *  1 byte: Flags
 *  8 bytes: Master Key descriptor
 *  16 bytes: Encryption Key derivation nonce
 */
struct fscrypt_context {
	u8 format;
	u8 contents_encryption_mode;
	u8 filenames_encryption_mode;
	u8 flags;
	u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE];
	u8 nonce[FS_KEY_DERIVATION_NONCE_SIZE];
} __packed;

#define FS_ENCRYPTION_CONTEXT_FORMAT_V1		1

/* This is passed in from userspace into the kernel keyring */
struct fscrypt_key {
	u32 mode;
	u8 raw[FS_MAX_KEY_SIZE];
	u32 size;
} __packed;

/*
 * A pointer to this structure is stored in the file system's in-core
 * representation of an inode.
 */
struct fscrypt_info {
	u8 ci_data_mode;
	u8 ci_filename_mode;
	u8 ci_flags;
	struct crypto_skcipher *ci_ctfm;
	struct key *ci_keyring_key;
	u8 ci_master_key[FS_KEY_DESCRIPTOR_SIZE];
};

#define FS_CTX_REQUIRES_FREE_ENCRYPT_FL		0x00000001
#define FS_CTX_HAS_BOUNCE_BUFFER_FL		0x00000002

struct fscrypt_completion_result {
	struct completion completion;
	int res;
};

#define DECLARE_FS_COMPLETION_RESULT(ecr) \
	struct fscrypt_completion_result ecr = { \
		COMPLETION_INITIALIZER((ecr).completion), 0 }


/* crypto.c */
int fscrypt_initialize(unsigned int cop_flags);

/* keyinfo.c */
extern int fscrypt_get_crypt_info(struct inode *);

#endif /* _FSCRYPT_PRIVATE_H */
ve&amp;id=e72e56597ba15ce70f4fc1eb2ceeaa8da0d4ab5e'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/tools/pcmcia/.gitignore'>
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<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-16 09:34:37 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-16 09:34:37 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=2eabb8b8d68bc9c7779ba8b04bec8d4f8baed0bc'>2eabb8b8d68bc9c7779ba8b04bec8d4f8baed0bc</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=2eabb8b8d68bc9c7779ba8b04bec8d4f8baed0bc'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=49def1853334396f948dcb4cedb9347abb318df5'>49def1853334396f948dcb4cedb9347abb318df5</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=2eabb8b8d68bc9c7779ba8b04bec8d4f8baed0bc&amp;id2=49def1853334396f948dcb4cedb9347abb318df5'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=ce1ca7d2d140a1f4aaffd297ac487f246963dd2f'>ce1ca7d2d140a1f4aaffd297ac487f246963dd2f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=2eabb8b8d68bc9c7779ba8b04bec8d4f8baed0bc&amp;id2=ce1ca7d2d140a1f4aaffd297ac487f246963dd2f'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'nfsd-4.10-1' of git://linux-nfs.org/~bfields/linux</div><div class='commit-msg'>Pull nfsd fixes from Bruce Fields:
 "Miscellaneous nfsd bugfixes, one for a 4.10 regression, three for
  older bugs"

* tag 'nfsd-4.10-1' of git://linux-nfs.org/~bfields/linux:
  svcrdma: avoid duplicate dma unmapping during error recovery
  sunrpc: don't call sleeping functions from the notifier block callbacks
  svcrpc: don't leak contexts on PROC_DESTROY
  nfsd: fix supported attributes for acl &amp; labels
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=2eabb8b8d68bc9c7779ba8b04bec8d4f8baed0bc'>Diffstat</a></div><table summary='diffstat' class='diffstat'>