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Diffstat (limited to 'fs/ext4/ext4_crypto.h')
-rw-r--r--fs/ext4/ext4_crypto.h159
1 files changed, 0 insertions, 159 deletions
diff --git a/fs/ext4/ext4_crypto.h b/fs/ext4/ext4_crypto.h
deleted file mode 100644
index 1f73c29717e1..000000000000
--- a/fs/ext4/ext4_crypto.h
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * linux/fs/ext4/ext4_crypto.h
- *
- * Copyright (C) 2015, Google, Inc.
- *
- * This contains encryption header content for ext4
- *
- * Written by Michael Halcrow, 2015.
- */
-
-#ifndef _EXT4_CRYPTO_H
-#define _EXT4_CRYPTO_H
-
-#include <linux/fs.h>
-
-#define EXT4_KEY_DESCRIPTOR_SIZE 8
-
-/* Policy provided via an ioctl on the topmost directory */
-struct ext4_encryption_policy {
- char version;
- char contents_encryption_mode;
- char filenames_encryption_mode;
- char flags;
- char master_key_descriptor[EXT4_KEY_DESCRIPTOR_SIZE];
-} __attribute__((__packed__));
-
-#define EXT4_ENCRYPTION_CONTEXT_FORMAT_V1 1
-#define EXT4_KEY_DERIVATION_NONCE_SIZE 16
-
-#define EXT4_POLICY_FLAGS_PAD_4 0x00
-#define EXT4_POLICY_FLAGS_PAD_8 0x01
-#define EXT4_POLICY_FLAGS_PAD_16 0x02
-#define EXT4_POLICY_FLAGS_PAD_32 0x03
-#define EXT4_POLICY_FLAGS_PAD_MASK 0x03
-#define EXT4_POLICY_FLAGS_VALID 0x03
-
-/**
- * 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: Reserved
- * 8 bytes: Master Key descriptor
- * 16 bytes: Encryption Key derivation nonce
- */
-struct ext4_encryption_context {
- char format;
- char contents_encryption_mode;
- char filenames_encryption_mode;
- char flags;
- char master_key_descriptor[EXT4_KEY_DESCRIPTOR_SIZE];
- char nonce[EXT4_KEY_DERIVATION_NONCE_SIZE];
-} __attribute__((__packed__));
-
-/* Encryption parameters */
-#define EXT4_XTS_TWEAK_SIZE 16
-#define EXT4_AES_128_ECB_KEY_SIZE 16
-#define EXT4_AES_256_GCM_KEY_SIZE 32
-#define EXT4_AES_256_CBC_KEY_SIZE 32
-#define EXT4_AES_256_CTS_KEY_SIZE 32
-#define EXT4_AES_256_XTS_KEY_SIZE 64
-#define EXT4_MAX_KEY_SIZE 64
-
-#define EXT4_KEY_DESC_PREFIX "ext4:"
-#define EXT4_KEY_DESC_PREFIX_SIZE 5
-
-/* This is passed in from userspace into the kernel keyring */
-struct ext4_encryption_key {
- __u32 mode;
- char raw[EXT4_MAX_KEY_SIZE];
- __u32 size;
-} __attribute__((__packed__));
-
-struct ext4_crypt_info {
- char ci_data_mode;
- char ci_filename_mode;
- char ci_flags;
- struct crypto_skcipher *ci_ctfm;
- struct key *ci_keyring_key;
- char ci_master_key[EXT4_KEY_DESCRIPTOR_SIZE];
-};
-
-#define EXT4_CTX_REQUIRES_FREE_ENCRYPT_FL 0x00000001
-#define EXT4_WRITE_PATH_FL 0x00000002
-
-struct ext4_crypto_ctx {
- union {
- struct {
- struct page *bounce_page; /* Ciphertext page */
- struct page *control_page; /* Original page */
- } w;
- struct {
- struct bio *bio;
- struct work_struct work;
- } r;
- struct list_head free_list; /* Free list */
- };
- char flags; /* Flags */
- char mode; /* Encryption mode for tfm */
-};
-
-struct ext4_completion_result {
- struct completion completion;
- int res;
-};
-
-#define DECLARE_EXT4_COMPLETION_RESULT(ecr) \
- struct ext4_completion_result ecr = { \
- COMPLETION_INITIALIZER((ecr).completion), 0 }
-
-static inline int ext4_encryption_key_size(int mode)
-{
- switch (mode) {
- case EXT4_ENCRYPTION_MODE_AES_256_XTS:
- return EXT4_AES_256_XTS_KEY_SIZE;
- case EXT4_ENCRYPTION_MODE_AES_256_GCM:
- return EXT4_AES_256_GCM_KEY_SIZE;
- case EXT4_ENCRYPTION_MODE_AES_256_CBC:
- return EXT4_AES_256_CBC_KEY_SIZE;
- case EXT4_ENCRYPTION_MODE_AES_256_CTS:
- return EXT4_AES_256_CTS_KEY_SIZE;
- default:
- BUG();
- }
- return 0;
-}
-
-#define EXT4_FNAME_NUM_SCATTER_ENTRIES 4
-#define EXT4_CRYPTO_BLOCK_SIZE 16
-#define EXT4_FNAME_CRYPTO_DIGEST_SIZE 32
-
-struct ext4_str {
- unsigned char *name;
- u32 len;
-};
-
-/**
- * For encrypted symlinks, the ciphertext length is stored at the beginning
- * of the string in little-endian format.
- */
-struct ext4_encrypted_symlink_data {
- __le16 len;
- char encrypted_path[1];
-} __attribute__((__packed__));
-
-/**
- * This function is used to calculate the disk space required to
- * store a filename of length l in encrypted symlink format.
- */
-static inline u32 encrypted_symlink_data_len(u32 l)
-{
- if (l < EXT4_CRYPTO_BLOCK_SIZE)
- l = EXT4_CRYPTO_BLOCK_SIZE;
- return (l + sizeof(struct ext4_encrypted_symlink_data) - 1);
-}
-
-#endif /* _EXT4_CRYPTO_H */