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793 lines
27 KiB
793 lines
27 KiB
/* 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 <[email protected]> |
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* Copyright (c) 2002 David S. Miller ([email protected]) |
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* Copyright (c) 2005 Herbert Xu <[email protected]> |
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* |
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* Portions derived from Cryptoapi, by Alexander Kjeldaas <[email protected]> |
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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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/* |
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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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|
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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. On architectures that support non-cache coherent |
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* DMA, such as ARM or arm64, it also takes into account the minimal alignment |
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* that is required to ensure that the context struct member does not share any |
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* cachelines with the rest of the struct. This is needed to ensure that cache |
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* maintenance for non-coherent DMA (cache invalidation in particular) does not |
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* affect data that may be accessed by the CPU concurrently. |
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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 |
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* @stats.compress: statistics for compress algorithm |
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* @stats.hash: statistics for hash algorithm |
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* @stats.rng: statistics for rng algorithm |
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* @stats.kpp: statistics for KPP algorithm |
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* |
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* The struct crypto_alg describes a generic Crypto API algorithm and is common |
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* for all of the transformations. Any variable not documented here shall not |
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* be used by a cipher implementation as it is internal to the Crypto API. |
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*/ |
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struct crypto_alg { |
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struct list_head cra_list; |
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struct list_head cra_users; |
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u32 cra_flags; |
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unsigned int cra_blocksize; |
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unsigned int cra_ctxsize; |
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unsigned int cra_alignmask; |
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int cra_priority; |
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refcount_t cra_refcnt; |
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char cra_name[CRYPTO_MAX_ALG_NAME]; |
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char cra_driver_name[CRYPTO_MAX_ALG_NAME]; |
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const struct crypto_type *cra_type; |
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union { |
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struct cipher_alg cipher; |
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struct compress_alg compress; |
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} cra_u; |
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int (*cra_init)(struct crypto_tfm *tfm); |
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void (*cra_exit)(struct crypto_tfm *tfm); |
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void (*cra_destroy)(struct crypto_alg *alg); |
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struct module *cra_module; |
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#ifdef CONFIG_CRYPTO_STATS |
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union { |
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struct crypto_istat_aead aead; |
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struct crypto_istat_akcipher akcipher; |
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struct crypto_istat_cipher cipher; |
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struct crypto_istat_compress compress; |
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struct crypto_istat_hash hash; |
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struct crypto_istat_rng rng; |
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struct crypto_istat_kpp kpp; |
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} stats; |
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#endif /* CONFIG_CRYPTO_STATS */ |
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|
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} CRYPTO_MINALIGN_ATTR; |
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#ifdef CONFIG_CRYPTO_STATS |
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void crypto_stats_init(struct crypto_alg *alg); |
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void crypto_stats_get(struct crypto_alg *alg); |
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void crypto_stats_aead_encrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret); |
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void crypto_stats_aead_decrypt(unsigned int cryptlen, struct crypto_alg *alg, int ret); |
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void crypto_stats_ahash_update(unsigned int nbytes, int ret, struct crypto_alg *alg); |
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void crypto_stats_ahash_final(unsigned int nbytes, int ret, struct crypto_alg *alg); |
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void crypto_stats_akcipher_encrypt(unsigned int src_len, int ret, struct crypto_alg *alg); |
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void crypto_stats_akcipher_decrypt(unsigned int src_len, int ret, struct crypto_alg *alg); |
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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); |
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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); |
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void crypto_stats_skcipher_encrypt(unsigned int cryptlen, int ret, struct crypto_alg *alg); |
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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_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); |
|
} |
|
|
|
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 */ |
|
|
|
|