954 строки
32 KiB
C
954 строки
32 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Scatterlist Cryptographic API.
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*
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* Copyright (c) 2002 David S. Miller (davem@redhat.com)
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* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>
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* and Nettle, by Niels Möller.
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*/
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#ifndef _LINUX_CRYPTO_H
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#define _LINUX_CRYPTO_H
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#include <linux/atomic.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/bug.h>
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#include <linux/refcount.h>
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#include <linux/slab.h>
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#include <linux/completion.h>
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/*
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* Autoloaded crypto modules should only use a prefixed name to avoid allowing
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* arbitrary modules to be loaded. Loading from userspace may still need the
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* unprefixed names, so retains those aliases as well.
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* This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3
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* gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro
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* expands twice on the same line. Instead, use a separate base name for the
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* alias.
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*/
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#define MODULE_ALIAS_CRYPTO(name) \
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__MODULE_INFO(alias, alias_userspace, name); \
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__MODULE_INFO(alias, alias_crypto, "crypto-" name)
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/*
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* Algorithm masks and types.
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*/
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#define CRYPTO_ALG_TYPE_MASK 0x0000000f
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#define CRYPTO_ALG_TYPE_CIPHER 0x00000001
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#define CRYPTO_ALG_TYPE_COMPRESS 0x00000002
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#define CRYPTO_ALG_TYPE_AEAD 0x00000003
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#define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005
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#define CRYPTO_ALG_TYPE_KPP 0x00000008
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#define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a
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#define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000000b
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#define CRYPTO_ALG_TYPE_RNG 0x0000000c
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#define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d
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#define CRYPTO_ALG_TYPE_HASH 0x0000000e
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#define CRYPTO_ALG_TYPE_SHASH 0x0000000e
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#define CRYPTO_ALG_TYPE_AHASH 0x0000000f
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#define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e
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#define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e
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#define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e
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#define CRYPTO_ALG_LARVAL 0x00000010
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#define CRYPTO_ALG_DEAD 0x00000020
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#define CRYPTO_ALG_DYING 0x00000040
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#define CRYPTO_ALG_ASYNC 0x00000080
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/*
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* Set if the algorithm (or an algorithm which it uses) requires another
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* algorithm of the same type to handle corner cases.
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*/
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#define CRYPTO_ALG_NEED_FALLBACK 0x00000100
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/*
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* Set if the algorithm has passed automated run-time testing. Note that
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* if there is no run-time testing for a given algorithm it is considered
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* to have passed.
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*/
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#define CRYPTO_ALG_TESTED 0x00000400
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/*
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* Set if the algorithm is an instance that is built from templates.
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*/
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#define CRYPTO_ALG_INSTANCE 0x00000800
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/* Set this bit if the algorithm provided is hardware accelerated but
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* not available to userspace via instruction set or so.
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*/
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#define CRYPTO_ALG_KERN_DRIVER_ONLY 0x00001000
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/*
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* Mark a cipher as a service implementation only usable by another
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* cipher and never by a normal user of the kernel crypto API
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*/
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#define CRYPTO_ALG_INTERNAL 0x00002000
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/*
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* Set if the algorithm has a ->setkey() method but can be used without
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* calling it first, i.e. there is a default key.
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*/
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#define CRYPTO_ALG_OPTIONAL_KEY 0x00004000
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/*
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* Don't trigger module loading
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*/
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#define CRYPTO_NOLOAD 0x00008000
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/*
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* The algorithm may allocate memory during request processing, i.e. during
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* encryption, decryption, or hashing. Users can request an algorithm with this
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* flag unset if they can't handle memory allocation failures.
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*
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* This flag is currently only implemented for algorithms of type "skcipher",
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* "aead", "ahash", "shash", and "cipher". Algorithms of other types might not
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* have this flag set even if they allocate memory.
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*
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* In some edge cases, algorithms can allocate memory regardless of this flag.
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* To avoid these cases, users must obey the following usage constraints:
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* skcipher:
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* - The IV buffer and all scatterlist elements must be aligned to the
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* algorithm's alignmask.
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* - If the data were to be divided into chunks of size
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* crypto_skcipher_walksize() (with any remainder going at the end), no
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* chunk can cross a page boundary or a scatterlist element boundary.
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* aead:
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* - The IV buffer and all scatterlist elements must be aligned to the
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* algorithm's alignmask.
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* - The first scatterlist element must contain all the associated data,
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* and its pages must be !PageHighMem.
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* - If the plaintext/ciphertext were to be divided into chunks of size
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* crypto_aead_walksize() (with the remainder going at the end), no chunk
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* can cross a page boundary or a scatterlist element boundary.
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* ahash:
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* - The result buffer must be aligned to the algorithm's alignmask.
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* - crypto_ahash_finup() must not be used unless the algorithm implements
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* ->finup() natively.
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*/
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#define CRYPTO_ALG_ALLOCATES_MEMORY 0x00010000
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/*
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* Transform masks and values (for crt_flags).
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*/
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#define CRYPTO_TFM_NEED_KEY 0x00000001
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#define CRYPTO_TFM_REQ_MASK 0x000fff00
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#define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x00000100
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#define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200
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#define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400
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/*
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* Miscellaneous stuff.
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*/
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#define CRYPTO_MAX_ALG_NAME 128
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/*
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* The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
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* declaration) is used to ensure that the crypto_tfm context structure is
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* aligned correctly for the given architecture so that there are no alignment
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* faults for C data types. In particular, this is required on platforms such
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* as arm where pointers are 32-bit aligned but there are data types such as
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* u64 which require 64-bit alignment.
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*/
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#define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN
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#define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
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struct scatterlist;
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struct crypto_async_request;
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struct crypto_tfm;
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struct crypto_type;
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typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err);
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/**
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* DOC: Block Cipher Context Data Structures
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*
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* These data structures define the operating context for each block cipher
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* type.
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*/
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struct crypto_async_request {
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struct list_head list;
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crypto_completion_t complete;
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void *data;
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struct crypto_tfm *tfm;
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u32 flags;
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};
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/**
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* DOC: Block Cipher Algorithm Definitions
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*
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* These data structures define modular crypto algorithm implementations,
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* managed via crypto_register_alg() and crypto_unregister_alg().
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*/
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/**
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* struct cipher_alg - single-block symmetric ciphers definition
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* @cia_min_keysize: Minimum key size supported by the transformation. This is
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* the smallest key length supported by this transformation
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* algorithm. This must be set to one of the pre-defined
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* values as this is not hardware specific. Possible values
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* for this field can be found via git grep "_MIN_KEY_SIZE"
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* include/crypto/
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* @cia_max_keysize: Maximum key size supported by the transformation. This is
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* the largest key length supported by this transformation
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* algorithm. This must be set to one of the pre-defined values
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* as this is not hardware specific. Possible values for this
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* field can be found via git grep "_MAX_KEY_SIZE"
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* include/crypto/
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* @cia_setkey: Set key for the transformation. This function is used to either
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* program a supplied key into the hardware or store the key in the
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* transformation context for programming it later. Note that this
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* function does modify the transformation context. This function
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* can be called multiple times during the existence of the
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* transformation object, so one must make sure the key is properly
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* reprogrammed into the hardware. This function is also
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* responsible for checking the key length for validity.
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* @cia_encrypt: Encrypt a single block. This function is used to encrypt a
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* single block of data, which must be @cra_blocksize big. This
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* always operates on a full @cra_blocksize and it is not possible
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* to encrypt a block of smaller size. The supplied buffers must
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* therefore also be at least of @cra_blocksize size. Both the
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* input and output buffers are always aligned to @cra_alignmask.
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* In case either of the input or output buffer supplied by user
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* of the crypto API is not aligned to @cra_alignmask, the crypto
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* API will re-align the buffers. The re-alignment means that a
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* new buffer will be allocated, the data will be copied into the
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* new buffer, then the processing will happen on the new buffer,
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* then the data will be copied back into the original buffer and
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* finally the new buffer will be freed. In case a software
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* fallback was put in place in the @cra_init call, this function
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* might need to use the fallback if the algorithm doesn't support
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* all of the key sizes. In case the key was stored in
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* transformation context, the key might need to be re-programmed
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* into the hardware in this function. This function shall not
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* modify the transformation context, as this function may be
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* called in parallel with the same transformation object.
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* @cia_decrypt: Decrypt a single block. This is a reverse counterpart to
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* @cia_encrypt, and the conditions are exactly the same.
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*
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* All fields are mandatory and must be filled.
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*/
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struct cipher_alg {
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unsigned int cia_min_keysize;
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unsigned int cia_max_keysize;
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int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen);
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void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
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void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
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};
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/**
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* struct compress_alg - compression/decompression algorithm
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* @coa_compress: Compress a buffer of specified length, storing the resulting
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* data in the specified buffer. Return the length of the
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* compressed data in dlen.
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* @coa_decompress: Decompress the source buffer, storing the uncompressed
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* data in the specified buffer. The length of the data is
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* returned in dlen.
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*
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* All fields are mandatory.
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*/
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struct compress_alg {
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int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src,
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unsigned int slen, u8 *dst, unsigned int *dlen);
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int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src,
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unsigned int slen, u8 *dst, unsigned int *dlen);
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};
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#ifdef CONFIG_CRYPTO_STATS
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/*
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* struct crypto_istat_aead - statistics for AEAD algorithm
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* @encrypt_cnt: number of encrypt requests
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* @encrypt_tlen: total data size handled by encrypt requests
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* @decrypt_cnt: number of decrypt requests
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* @decrypt_tlen: total data size handled by decrypt requests
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* @err_cnt: number of error for AEAD requests
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*/
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struct crypto_istat_aead {
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atomic64_t encrypt_cnt;
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atomic64_t encrypt_tlen;
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atomic64_t decrypt_cnt;
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atomic64_t decrypt_tlen;
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atomic64_t err_cnt;
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};
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/*
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* struct crypto_istat_akcipher - statistics for akcipher algorithm
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* @encrypt_cnt: number of encrypt requests
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* @encrypt_tlen: total data size handled by encrypt requests
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* @decrypt_cnt: number of decrypt requests
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* @decrypt_tlen: total data size handled by decrypt requests
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* @verify_cnt: number of verify operation
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* @sign_cnt: number of sign requests
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* @err_cnt: number of error for akcipher requests
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*/
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struct crypto_istat_akcipher {
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atomic64_t encrypt_cnt;
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atomic64_t encrypt_tlen;
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atomic64_t decrypt_cnt;
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atomic64_t decrypt_tlen;
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atomic64_t verify_cnt;
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atomic64_t sign_cnt;
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atomic64_t err_cnt;
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};
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/*
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* struct crypto_istat_cipher - statistics for cipher algorithm
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* @encrypt_cnt: number of encrypt requests
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* @encrypt_tlen: total data size handled by encrypt requests
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* @decrypt_cnt: number of decrypt requests
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* @decrypt_tlen: total data size handled by decrypt requests
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* @err_cnt: number of error for cipher requests
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*/
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struct crypto_istat_cipher {
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atomic64_t encrypt_cnt;
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atomic64_t encrypt_tlen;
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atomic64_t decrypt_cnt;
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atomic64_t decrypt_tlen;
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atomic64_t err_cnt;
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};
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/*
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* struct crypto_istat_compress - statistics for compress algorithm
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* @compress_cnt: number of compress requests
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* @compress_tlen: total data size handled by compress requests
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* @decompress_cnt: number of decompress requests
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* @decompress_tlen: total data size handled by decompress requests
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* @err_cnt: number of error for compress requests
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*/
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struct crypto_istat_compress {
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atomic64_t compress_cnt;
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atomic64_t compress_tlen;
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atomic64_t decompress_cnt;
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atomic64_t decompress_tlen;
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atomic64_t err_cnt;
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};
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/*
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* struct crypto_istat_hash - statistics for has algorithm
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* @hash_cnt: number of hash requests
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* @hash_tlen: total data size hashed
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* @err_cnt: number of error for hash requests
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*/
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struct crypto_istat_hash {
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atomic64_t hash_cnt;
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atomic64_t hash_tlen;
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atomic64_t err_cnt;
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};
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/*
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* struct crypto_istat_kpp - statistics for KPP algorithm
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* @setsecret_cnt: number of setsecrey operation
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* @generate_public_key_cnt: number of generate_public_key operation
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* @compute_shared_secret_cnt: number of compute_shared_secret operation
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* @err_cnt: number of error for KPP requests
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*/
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struct crypto_istat_kpp {
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atomic64_t setsecret_cnt;
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atomic64_t generate_public_key_cnt;
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atomic64_t compute_shared_secret_cnt;
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atomic64_t err_cnt;
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};
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/*
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* struct crypto_istat_rng: statistics for RNG algorithm
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* @generate_cnt: number of RNG generate requests
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* @generate_tlen: total data size of generated data by the RNG
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* @seed_cnt: number of times the RNG was seeded
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* @err_cnt: number of error for RNG requests
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*/
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struct crypto_istat_rng {
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atomic64_t generate_cnt;
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atomic64_t generate_tlen;
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atomic64_t seed_cnt;
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atomic64_t err_cnt;
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};
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#endif /* CONFIG_CRYPTO_STATS */
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#define cra_cipher cra_u.cipher
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#define cra_compress cra_u.compress
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/**
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* struct crypto_alg - definition of a cryptograpic cipher algorithm
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* @cra_flags: Flags describing this transformation. See include/linux/crypto.h
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* CRYPTO_ALG_* flags for the flags which go in here. Those are
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* used for fine-tuning the description of the transformation
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* algorithm.
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* @cra_blocksize: Minimum block size of this transformation. The size in bytes
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* of the smallest possible unit which can be transformed with
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* this algorithm. The users must respect this value.
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* In case of HASH transformation, it is possible for a smaller
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* block than @cra_blocksize to be passed to the crypto API for
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* transformation, in case of any other transformation type, an
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* error will be returned upon any attempt to transform smaller
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* than @cra_blocksize chunks.
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* @cra_ctxsize: Size of the operational context of the transformation. This
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* value informs the kernel crypto API about the memory size
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* needed to be allocated for the transformation context.
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* @cra_alignmask: Alignment mask for the input and output data buffer. The data
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* buffer containing the input data for the algorithm must be
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* aligned to this alignment mask. The data buffer for the
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* output data must be aligned to this alignment mask. Note that
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* the Crypto API will do the re-alignment in software, but
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* only under special conditions and there is a performance hit.
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* The re-alignment happens at these occasions for different
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* @cra_u types: cipher -- For both input data and output data
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* buffer; ahash -- For output hash destination buf; shash --
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* For output hash destination buf.
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* This is needed on hardware which is flawed by design and
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* cannot pick data from arbitrary addresses.
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* @cra_priority: Priority of this transformation implementation. In case
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* multiple transformations with same @cra_name are available to
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* the Crypto API, the kernel will use the one with highest
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* @cra_priority.
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* @cra_name: Generic name (usable by multiple implementations) of the
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* transformation algorithm. This is the name of the transformation
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* itself. This field is used by the kernel when looking up the
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* providers of particular transformation.
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* @cra_driver_name: Unique name of the transformation provider. This is the
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* name of the provider of the transformation. This can be any
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* arbitrary value, but in the usual case, this contains the
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* name of the chip or provider and the name of the
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* transformation algorithm.
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* @cra_type: Type of the cryptographic transformation. This is a pointer to
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* struct crypto_type, which implements callbacks common for all
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* transformation types. There are multiple options, such as
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* &crypto_skcipher_type, &crypto_ahash_type, &crypto_rng_type.
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* This field might be empty. In that case, there are no common
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* callbacks. This is the case for: cipher, compress, shash.
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* @cra_u: Callbacks implementing the transformation. This is a union of
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* multiple structures. Depending on the type of transformation selected
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* by @cra_type and @cra_flags above, the associated structure must be
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* filled with callbacks. This field might be empty. This is the case
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* for ahash, shash.
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* @cra_init: Initialize the cryptographic transformation object. This function
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* is used to initialize the cryptographic transformation object.
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* This function is called only once at the instantiation time, right
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* after the transformation context was allocated. In case the
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* cryptographic hardware has some special requirements which need to
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* be handled by software, this function shall check for the precise
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* requirement of the transformation and put any software fallbacks
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* in place.
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* @cra_exit: Deinitialize the cryptographic transformation object. This is a
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* counterpart to @cra_init, used to remove various changes set in
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* @cra_init.
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* @cra_u.cipher: Union member which contains a single-block symmetric cipher
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* definition. See @struct @cipher_alg.
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* @cra_u.compress: Union member which contains a (de)compression algorithm.
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* See @struct @compress_alg.
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* @cra_module: Owner of this transformation implementation. Set to THIS_MODULE
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* @cra_list: internally used
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* @cra_users: internally used
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* @cra_refcnt: internally used
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* @cra_destroy: internally used
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*
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* @stats: union of all possible crypto_istat_xxx structures
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* @stats.aead: statistics for AEAD algorithm
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* @stats.akcipher: statistics for akcipher algorithm
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* @stats.cipher: statistics for cipher algorithm
|
|
* @stats.compress: statistics for compress algorithm
|
|
* @stats.hash: statistics for hash algorithm
|
|
* @stats.rng: statistics for rng algorithm
|
|
* @stats.kpp: statistics for KPP algorithm
|
|
*
|
|
* The struct crypto_alg describes a generic Crypto API algorithm and is common
|
|
* for all of the transformations. Any variable not documented here shall not
|
|
* be used by a cipher implementation as it is internal to the Crypto API.
|
|
*/
|
|
struct crypto_alg {
|
|
struct list_head cra_list;
|
|
struct list_head cra_users;
|
|
|
|
u32 cra_flags;
|
|
unsigned int cra_blocksize;
|
|
unsigned int cra_ctxsize;
|
|
unsigned int cra_alignmask;
|
|
|
|
int cra_priority;
|
|
refcount_t cra_refcnt;
|
|
|
|
char cra_name[CRYPTO_MAX_ALG_NAME];
|
|
char cra_driver_name[CRYPTO_MAX_ALG_NAME];
|
|
|
|
const struct crypto_type *cra_type;
|
|
|
|
union {
|
|
struct cipher_alg cipher;
|
|
struct compress_alg compress;
|
|
} cra_u;
|
|
|
|
int (*cra_init)(struct crypto_tfm *tfm);
|
|
void (*cra_exit)(struct crypto_tfm *tfm);
|
|
void (*cra_destroy)(struct crypto_alg *alg);
|
|
|
|
struct module *cra_module;
|
|
|
|
#ifdef CONFIG_CRYPTO_STATS
|
|
union {
|
|
struct crypto_istat_aead aead;
|
|
struct crypto_istat_akcipher akcipher;
|
|
struct crypto_istat_cipher cipher;
|
|
struct crypto_istat_compress compress;
|
|
struct crypto_istat_hash hash;
|
|
struct crypto_istat_rng rng;
|
|
struct crypto_istat_kpp kpp;
|
|
} stats;
|
|
#endif /* CONFIG_CRYPTO_STATS */
|
|
|
|
} CRYPTO_MINALIGN_ATTR;
|
|
|
|
#ifdef CONFIG_CRYPTO_STATS
|
|
void crypto_stats_init(struct crypto_alg *alg);
|
|
void crypto_stats_get(struct crypto_alg *alg);
|
|
void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret);
|
|
void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret);
|
|
void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg);
|
|
void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg);
|
|
void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg);
|
|
void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg);
|
|
void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg);
|
|
void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg);
|
|
void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg);
|
|
void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg);
|
|
void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret);
|
|
void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret);
|
|
void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret);
|
|
void crypto_stats_rng_seed(struct crypto_alg *alg, int ret);
|
|
void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret);
|
|
void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg);
|
|
void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg);
|
|
#else
|
|
static inline void crypto_stats_init(struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_get(struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret)
|
|
{}
|
|
static inline void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret)
|
|
{}
|
|
static inline void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_akcipher_sign(int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_akcipher_verify(int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_compress(unsigned int slen, int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_decompress(unsigned int slen, int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_kpp_set_secret(struct crypto_alg *alg, int ret)
|
|
{}
|
|
static inline void crypto_stats_kpp_generate_public_key(struct crypto_alg *alg, int ret)
|
|
{}
|
|
static inline void crypto_stats_kpp_compute_shared_secret(struct crypto_alg *alg, int ret)
|
|
{}
|
|
static inline void crypto_stats_rng_seed(struct crypto_alg *alg, int ret)
|
|
{}
|
|
static inline void crypto_stats_rng_generate(struct crypto_alg *alg, unsigned int dlen, int ret)
|
|
{}
|
|
static inline void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg)
|
|
{}
|
|
static inline void crypto_stats_skcipher_decrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg)
|
|
{}
|
|
#endif
|
|
/*
|
|
* A helper struct for waiting for completion of async crypto ops
|
|
*/
|
|
struct crypto_wait {
|
|
struct completion completion;
|
|
int err;
|
|
};
|
|
|
|
/*
|
|
* Macro for declaring a crypto op async wait object on stack
|
|
*/
|
|
#define DECLARE_CRYPTO_WAIT(_wait) \
|
|
struct crypto_wait _wait = { \
|
|
COMPLETION_INITIALIZER_ONSTACK((_wait).completion), 0 }
|
|
|
|
/*
|
|
* Async ops completion helper functioons
|
|
*/
|
|
void crypto_req_done(struct crypto_async_request *req, int err);
|
|
|
|
static inline int crypto_wait_req(int err, struct crypto_wait *wait)
|
|
{
|
|
switch (err) {
|
|
case -EINPROGRESS:
|
|
case -EBUSY:
|
|
wait_for_completion(&wait->completion);
|
|
reinit_completion(&wait->completion);
|
|
err = wait->err;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static inline void crypto_init_wait(struct crypto_wait *wait)
|
|
{
|
|
init_completion(&wait->completion);
|
|
}
|
|
|
|
/*
|
|
* Algorithm registration interface.
|
|
*/
|
|
int crypto_register_alg(struct crypto_alg *alg);
|
|
void crypto_unregister_alg(struct crypto_alg *alg);
|
|
int crypto_register_algs(struct crypto_alg *algs, int count);
|
|
void crypto_unregister_algs(struct crypto_alg *algs, int count);
|
|
|
|
/*
|
|
* Algorithm query interface.
|
|
*/
|
|
int crypto_has_alg(const char *name, u32 type, u32 mask);
|
|
|
|
/*
|
|
* Transforms: user-instantiated objects which encapsulate algorithms
|
|
* and core processing logic. Managed via crypto_alloc_*() and
|
|
* crypto_free_*(), as well as the various helpers below.
|
|
*/
|
|
|
|
struct crypto_tfm {
|
|
|
|
u32 crt_flags;
|
|
|
|
int node;
|
|
|
|
void (*exit)(struct crypto_tfm *tfm);
|
|
|
|
struct crypto_alg *__crt_alg;
|
|
|
|
void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
|
|
};
|
|
|
|
struct crypto_cipher {
|
|
struct crypto_tfm base;
|
|
};
|
|
|
|
struct crypto_comp {
|
|
struct crypto_tfm base;
|
|
};
|
|
|
|
enum {
|
|
CRYPTOA_UNSPEC,
|
|
CRYPTOA_ALG,
|
|
CRYPTOA_TYPE,
|
|
CRYPTOA_U32,
|
|
__CRYPTOA_MAX,
|
|
};
|
|
|
|
#define CRYPTOA_MAX (__CRYPTOA_MAX - 1)
|
|
|
|
/* Maximum number of (rtattr) parameters for each template. */
|
|
#define CRYPTO_MAX_ATTRS 32
|
|
|
|
struct crypto_attr_alg {
|
|
char name[CRYPTO_MAX_ALG_NAME];
|
|
};
|
|
|
|
struct crypto_attr_type {
|
|
u32 type;
|
|
u32 mask;
|
|
};
|
|
|
|
struct crypto_attr_u32 {
|
|
u32 num;
|
|
};
|
|
|
|
/*
|
|
* Transform user interface.
|
|
*/
|
|
|
|
struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);
|
|
void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm);
|
|
|
|
static inline void crypto_free_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
return crypto_destroy_tfm(tfm, tfm);
|
|
}
|
|
|
|
int alg_test(const char *driver, const char *alg, u32 type, u32 mask);
|
|
|
|
/*
|
|
* Transform helpers which query the underlying algorithm.
|
|
*/
|
|
static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
|
|
{
|
|
return tfm->__crt_alg->cra_name;
|
|
}
|
|
|
|
static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
|
|
{
|
|
return tfm->__crt_alg->cra_driver_name;
|
|
}
|
|
|
|
static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
|
|
{
|
|
return tfm->__crt_alg->cra_priority;
|
|
}
|
|
|
|
static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
|
|
{
|
|
return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
|
|
}
|
|
|
|
static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
|
|
{
|
|
return tfm->__crt_alg->cra_blocksize;
|
|
}
|
|
|
|
static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm)
|
|
{
|
|
return tfm->__crt_alg->cra_alignmask;
|
|
}
|
|
|
|
static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
|
|
{
|
|
return tfm->crt_flags;
|
|
}
|
|
|
|
static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
|
|
{
|
|
tfm->crt_flags |= flags;
|
|
}
|
|
|
|
static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
|
|
{
|
|
tfm->crt_flags &= ~flags;
|
|
}
|
|
|
|
static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
|
|
{
|
|
return tfm->__crt_ctx;
|
|
}
|
|
|
|
static inline unsigned int crypto_tfm_ctx_alignment(void)
|
|
{
|
|
struct crypto_tfm *tfm;
|
|
return __alignof__(tfm->__crt_ctx);
|
|
}
|
|
|
|
/**
|
|
* DOC: Single Block Cipher API
|
|
*
|
|
* The single block cipher API is used with the ciphers of type
|
|
* CRYPTO_ALG_TYPE_CIPHER (listed as type "cipher" in /proc/crypto).
|
|
*
|
|
* Using the single block cipher API calls, operations with the basic cipher
|
|
* primitive can be implemented. These cipher primitives exclude any block
|
|
* chaining operations including IV handling.
|
|
*
|
|
* The purpose of this single block cipher API is to support the implementation
|
|
* of templates or other concepts that only need to perform the cipher operation
|
|
* on one block at a time. Templates invoke the underlying cipher primitive
|
|
* block-wise and process either the input or the output data of these cipher
|
|
* operations.
|
|
*/
|
|
|
|
static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm)
|
|
{
|
|
return (struct crypto_cipher *)tfm;
|
|
}
|
|
|
|
/**
|
|
* crypto_alloc_cipher() - allocate single block cipher handle
|
|
* @alg_name: is the cra_name / name or cra_driver_name / driver name of the
|
|
* single block cipher
|
|
* @type: specifies the type of the cipher
|
|
* @mask: specifies the mask for the cipher
|
|
*
|
|
* Allocate a cipher handle for a single block cipher. The returned struct
|
|
* crypto_cipher is the cipher handle that is required for any subsequent API
|
|
* invocation for that single block cipher.
|
|
*
|
|
* Return: allocated cipher handle in case of success; IS_ERR() is true in case
|
|
* of an error, PTR_ERR() returns the error code.
|
|
*/
|
|
static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
|
|
u32 type, u32 mask)
|
|
{
|
|
type &= ~CRYPTO_ALG_TYPE_MASK;
|
|
type |= CRYPTO_ALG_TYPE_CIPHER;
|
|
mask |= CRYPTO_ALG_TYPE_MASK;
|
|
|
|
return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
|
|
}
|
|
|
|
static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
|
|
{
|
|
return &tfm->base;
|
|
}
|
|
|
|
/**
|
|
* crypto_free_cipher() - zeroize and free the single block cipher handle
|
|
* @tfm: cipher handle to be freed
|
|
*/
|
|
static inline void crypto_free_cipher(struct crypto_cipher *tfm)
|
|
{
|
|
crypto_free_tfm(crypto_cipher_tfm(tfm));
|
|
}
|
|
|
|
/**
|
|
* crypto_has_cipher() - Search for the availability of a single block cipher
|
|
* @alg_name: is the cra_name / name or cra_driver_name / driver name of the
|
|
* single block cipher
|
|
* @type: specifies the type of the cipher
|
|
* @mask: specifies the mask for the cipher
|
|
*
|
|
* Return: true when the single block cipher is known to the kernel crypto API;
|
|
* false otherwise
|
|
*/
|
|
static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask)
|
|
{
|
|
type &= ~CRYPTO_ALG_TYPE_MASK;
|
|
type |= CRYPTO_ALG_TYPE_CIPHER;
|
|
mask |= CRYPTO_ALG_TYPE_MASK;
|
|
|
|
return crypto_has_alg(alg_name, type, mask);
|
|
}
|
|
|
|
/**
|
|
* crypto_cipher_blocksize() - obtain block size for cipher
|
|
* @tfm: cipher handle
|
|
*
|
|
* The block size for the single block cipher referenced with the cipher handle
|
|
* tfm is returned. The caller may use that information to allocate appropriate
|
|
* memory for the data returned by the encryption or decryption operation
|
|
*
|
|
* Return: block size of cipher
|
|
*/
|
|
static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
|
|
{
|
|
return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
|
|
}
|
|
|
|
static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
|
|
{
|
|
return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
|
|
}
|
|
|
|
static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
|
|
{
|
|
return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
|
|
}
|
|
|
|
static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
|
|
u32 flags)
|
|
{
|
|
crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
|
|
}
|
|
|
|
static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
|
|
u32 flags)
|
|
{
|
|
crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
|
|
}
|
|
|
|
/**
|
|
* crypto_cipher_setkey() - set key for cipher
|
|
* @tfm: cipher handle
|
|
* @key: buffer holding the key
|
|
* @keylen: length of the key in bytes
|
|
*
|
|
* The caller provided key is set for the single block cipher referenced by the
|
|
* cipher handle.
|
|
*
|
|
* Note, the key length determines the cipher type. Many block ciphers implement
|
|
* different cipher modes depending on the key size, such as AES-128 vs AES-192
|
|
* vs. AES-256. When providing a 16 byte key for an AES cipher handle, AES-128
|
|
* is performed.
|
|
*
|
|
* Return: 0 if the setting of the key was successful; < 0 if an error occurred
|
|
*/
|
|
int crypto_cipher_setkey(struct crypto_cipher *tfm,
|
|
const u8 *key, unsigned int keylen);
|
|
|
|
/**
|
|
* crypto_cipher_encrypt_one() - encrypt one block of plaintext
|
|
* @tfm: cipher handle
|
|
* @dst: points to the buffer that will be filled with the ciphertext
|
|
* @src: buffer holding the plaintext to be encrypted
|
|
*
|
|
* Invoke the encryption operation of one block. The caller must ensure that
|
|
* the plaintext and ciphertext buffers are at least one block in size.
|
|
*/
|
|
void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
|
|
u8 *dst, const u8 *src);
|
|
|
|
/**
|
|
* crypto_cipher_decrypt_one() - decrypt one block of ciphertext
|
|
* @tfm: cipher handle
|
|
* @dst: points to the buffer that will be filled with the plaintext
|
|
* @src: buffer holding the ciphertext to be decrypted
|
|
*
|
|
* Invoke the decryption operation of one block. The caller must ensure that
|
|
* the plaintext and ciphertext buffers are at least one block in size.
|
|
*/
|
|
void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
|
|
u8 *dst, const u8 *src);
|
|
|
|
static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
|
|
{
|
|
return (struct crypto_comp *)tfm;
|
|
}
|
|
|
|
static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
|
|
u32 type, u32 mask)
|
|
{
|
|
type &= ~CRYPTO_ALG_TYPE_MASK;
|
|
type |= CRYPTO_ALG_TYPE_COMPRESS;
|
|
mask |= CRYPTO_ALG_TYPE_MASK;
|
|
|
|
return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask));
|
|
}
|
|
|
|
static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm)
|
|
{
|
|
return &tfm->base;
|
|
}
|
|
|
|
static inline void crypto_free_comp(struct crypto_comp *tfm)
|
|
{
|
|
crypto_free_tfm(crypto_comp_tfm(tfm));
|
|
}
|
|
|
|
static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask)
|
|
{
|
|
type &= ~CRYPTO_ALG_TYPE_MASK;
|
|
type |= CRYPTO_ALG_TYPE_COMPRESS;
|
|
mask |= CRYPTO_ALG_TYPE_MASK;
|
|
|
|
return crypto_has_alg(alg_name, type, mask);
|
|
}
|
|
|
|
static inline const char *crypto_comp_name(struct crypto_comp *tfm)
|
|
{
|
|
return crypto_tfm_alg_name(crypto_comp_tfm(tfm));
|
|
}
|
|
|
|
int crypto_comp_compress(struct crypto_comp *tfm,
|
|
const u8 *src, unsigned int slen,
|
|
u8 *dst, unsigned int *dlen);
|
|
|
|
int crypto_comp_decompress(struct crypto_comp *tfm,
|
|
const u8 *src, unsigned int slen,
|
|
u8 *dst, unsigned int *dlen);
|
|
|
|
#endif /* _LINUX_CRYPTO_H */
|
|
|