/* * 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 #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 */ '/cgit.cgi/linux/net-next.git/log/arch/mips/pci/fixup-ip32.c'>
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