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- /* SPDX-License-Identifier: GPL-2.0-or-later */
- /*
- * Scatterlist Cryptographic API.
- *
- * Copyright (c) 2002 James Morris <[email protected]>
- * Copyright (c) 2002 David S. Miller ([email protected])
- * Copyright (c) 2005 Herbert Xu <[email protected]>
- *
- * Portions derived from Cryptoapi, by Alexander Kjeldaas <[email protected]>
- * and Nettle, by Niels Möller.
- */
- #ifndef _LINUX_CRYPTO_H
- #define _LINUX_CRYPTO_H
- #include <linux/atomic.h>
- #include <linux/kernel.h>
- #include <linux/list.h>
- #include <linux/bug.h>
- #include <linux/refcount.h>
- #include <linux/slab.h>
- #include <linux/completion.h>
- /*
- * Autoloaded crypto modules should only use a prefixed name to avoid allowing
- * arbitrary modules to be loaded. Loading from userspace may still need the
- * unprefixed names, so retains those aliases as well.
- * This uses __MODULE_INFO directly instead of MODULE_ALIAS because pre-4.3
- * gcc (e.g. avr32 toolchain) uses __LINE__ for uniqueness, and this macro
- * expands twice on the same line. Instead, use a separate base name for the
- * alias.
- */
- #define MODULE_ALIAS_CRYPTO(name) \
- __MODULE_INFO(alias, alias_userspace, name); \
- __MODULE_INFO(alias, alias_crypto, "crypto-" name)
- /*
- * Algorithm masks and types.
- */
- #define CRYPTO_ALG_TYPE_MASK 0x0000000f
- #define CRYPTO_ALG_TYPE_CIPHER 0x00000001
- #define CRYPTO_ALG_TYPE_COMPRESS 0x00000002
- #define CRYPTO_ALG_TYPE_AEAD 0x00000003
- #define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005
- #define CRYPTO_ALG_TYPE_KPP 0x00000008
- #define CRYPTO_ALG_TYPE_ACOMPRESS 0x0000000a
- #define CRYPTO_ALG_TYPE_SCOMPRESS 0x0000000b
- #define CRYPTO_ALG_TYPE_RNG 0x0000000c
- #define CRYPTO_ALG_TYPE_AKCIPHER 0x0000000d
- #define CRYPTO_ALG_TYPE_HASH 0x0000000e
- #define CRYPTO_ALG_TYPE_SHASH 0x0000000e
- #define CRYPTO_ALG_TYPE_AHASH 0x0000000f
- #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e
- #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e
- #define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e
- #define CRYPTO_ALG_LARVAL 0x00000010
- #define CRYPTO_ALG_DEAD 0x00000020
- #define CRYPTO_ALG_DYING 0x00000040
- #define CRYPTO_ALG_ASYNC 0x00000080
- /*
- * Set if the algorithm (or an algorithm which it uses) requires another
- * algorithm of the same type to handle corner cases.
- */
- #define CRYPTO_ALG_NEED_FALLBACK 0x00000100
- /*
- * Set if the algorithm has passed automated run-time testing. Note that
- * if there is no run-time testing for a given algorithm it is considered
- * to have passed.
- */
- #define CRYPTO_ALG_TESTED 0x00000400
- /*
- * Set if the algorithm is an instance that is built from templates.
- */
- #define CRYPTO_ALG_INSTANCE 0x00000800
- /* Set this bit if the algorithm provided is hardware accelerated but
- * not available to userspace via instruction set or so.
- */
- #define CRYPTO_ALG_KERN_DRIVER_ONLY 0x00001000
- /*
- * Mark a cipher as a service implementation only usable by another
- * cipher and never by a normal user of the kernel crypto API
- */
- #define CRYPTO_ALG_INTERNAL 0x00002000
- /*
- * Set if the algorithm has a ->setkey() method but can be used without
- * calling it first, i.e. there is a default key.
- */
- #define CRYPTO_ALG_OPTIONAL_KEY 0x00004000
- /*
- * Don't trigger module loading
- */
- #define CRYPTO_NOLOAD 0x00008000
- /*
- * The algorithm may allocate memory during request processing, i.e. during
- * encryption, decryption, or hashing. Users can request an algorithm with this
- * flag unset if they can't handle memory allocation failures.
- *
- * This flag is currently only implemented for algorithms of type "skcipher",
- * "aead", "ahash", "shash", and "cipher". Algorithms of other types might not
- * have this flag set even if they allocate memory.
- *
- * In some edge cases, algorithms can allocate memory regardless of this flag.
- * To avoid these cases, users must obey the following usage constraints:
- * skcipher:
- * - The IV buffer and all scatterlist elements must be aligned to the
- * algorithm's alignmask.
- * - If the data were to be divided into chunks of size
- * crypto_skcipher_walksize() (with any remainder going at the end), no
- * chunk can cross a page boundary or a scatterlist element boundary.
- * aead:
- * - The IV buffer and all scatterlist elements must be aligned to the
- * algorithm's alignmask.
- * - The first scatterlist element must contain all the associated data,
- * and its pages must be !PageHighMem.
- * - If the plaintext/ciphertext were to be divided into chunks of size
- * crypto_aead_walksize() (with the remainder going at the end), no chunk
- * can cross a page boundary or a scatterlist element boundary.
- * ahash:
- * - The result buffer must be aligned to the algorithm's alignmask.
- * - crypto_ahash_finup() must not be used unless the algorithm implements
- * ->finup() natively.
- */
- #define CRYPTO_ALG_ALLOCATES_MEMORY 0x00010000
- /*
- * Mark an algorithm as a service implementation only usable by a
- * template and never by a normal user of the kernel crypto API.
- * This is intended to be used by algorithms that are themselves
- * not FIPS-approved but may instead be used to implement parts of
- * a FIPS-approved algorithm (e.g., dh vs. ffdhe2048(dh)).
- */
- #define CRYPTO_ALG_FIPS_INTERNAL 0x00020000
- /*
- * Transform masks and values (for crt_flags).
- */
- #define CRYPTO_TFM_NEED_KEY 0x00000001
- #define CRYPTO_TFM_REQ_MASK 0x000fff00
- #define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x00000100
- #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200
- #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400
- /*
- * Miscellaneous stuff.
- */
- #define CRYPTO_MAX_ALG_NAME 128
- /*
- * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
- * declaration) is used to ensure that the crypto_tfm context structure is
- * aligned correctly for the given architecture so that there are no alignment
- * faults for C data types. On architectures that support non-cache coherent
- * DMA, such as ARM or arm64, it also takes into account the minimal alignment
- * that is required to ensure that the context struct member does not share any
- * cachelines with the rest of the struct. This is needed to ensure that cache
- * maintenance for non-coherent DMA (cache invalidation in particular) does not
- * affect data that may be accessed by the CPU concurrently.
- */
- #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN
- #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
- struct scatterlist;
- struct crypto_async_request;
- struct crypto_tfm;
- struct crypto_type;
- typedef struct crypto_async_request crypto_completion_data_t;
- typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err);
- /**
- * DOC: Block Cipher Context Data Structures
- *
- * These data structures define the operating context for each block cipher
- * type.
- */
- struct crypto_async_request {
- struct list_head list;
- crypto_completion_t complete;
- void *data;
- struct crypto_tfm *tfm;
- u32 flags;
- };
- /**
- * DOC: Block Cipher Algorithm Definitions
- *
- * These data structures define modular crypto algorithm implementations,
- * managed via crypto_register_alg() and crypto_unregister_alg().
- */
- /**
- * struct cipher_alg - single-block symmetric ciphers definition
- * @cia_min_keysize: Minimum key size supported by the transformation. This is
- * the smallest key length supported by this transformation
- * algorithm. This must be set to one of the pre-defined
- * values as this is not hardware specific. Possible values
- * for this field can be found via git grep "_MIN_KEY_SIZE"
- * include/crypto/
- * @cia_max_keysize: Maximum key size supported by the transformation. This is
- * the largest key length supported by this transformation
- * algorithm. This must be set to one of the pre-defined values
- * as this is not hardware specific. Possible values for this
- * field can be found via git grep "_MAX_KEY_SIZE"
- * include/crypto/
- * @cia_setkey: Set key for the transformation. This function is used to either
- * program a supplied key into the hardware or store the key in the
- * transformation context for programming it later. Note that this
- * function does modify the transformation context. This function
- * can be called multiple times during the existence of the
- * transformation object, so one must make sure the key is properly
- * reprogrammed into the hardware. This function is also
- * responsible for checking the key length for validity.
- * @cia_encrypt: Encrypt a single block. This function is used to encrypt a
- * single block of data, which must be @cra_blocksize big. This
- * always operates on a full @cra_blocksize and it is not possible
- * to encrypt a block of smaller size. The supplied buffers must
- * therefore also be at least of @cra_blocksize size. Both the
- * input and output buffers are always aligned to @cra_alignmask.
- * In case either of the input or output buffer supplied by user
- * of the crypto API is not aligned to @cra_alignmask, the crypto
- * API will re-align the buffers. The re-alignment means that a
- * new buffer will be allocated, the data will be copied into the
- * new buffer, then the processing will happen on the new buffer,
- * then the data will be copied back into the original buffer and
- * finally the new buffer will be freed. In case a software
- * fallback was put in place in the @cra_init call, this function
- * might need to use the fallback if the algorithm doesn't support
- * all of the key sizes. In case the key was stored in
- * transformation context, the key might need to be re-programmed
- * into the hardware in this function. This function shall not
- * modify the transformation context, as this function may be
- * called in parallel with the same transformation object.
- * @cia_decrypt: Decrypt a single block. This is a reverse counterpart to
- * @cia_encrypt, and the conditions are exactly the same.
- *
- * All fields are mandatory and must be filled.
- */
- struct cipher_alg {
- unsigned int cia_min_keysize;
- unsigned int cia_max_keysize;
- int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen);
- void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
- void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
- };
- /**
- * struct compress_alg - compression/decompression algorithm
- * @coa_compress: Compress a buffer of specified length, storing the resulting
- * data in the specified buffer. Return the length of the
- * compressed data in dlen.
- * @coa_decompress: Decompress the source buffer, storing the uncompressed
- * data in the specified buffer. The length of the data is
- * returned in dlen.
- *
- * All fields are mandatory.
- */
- struct compress_alg {
- int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src,
- unsigned int slen, u8 *dst, unsigned int *dlen);
- int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src,
- unsigned int slen, u8 *dst, unsigned int *dlen);
- };
- #ifdef CONFIG_CRYPTO_STATS
- /*
- * struct crypto_istat_aead - statistics for AEAD algorithm
- * @encrypt_cnt: number of encrypt requests
- * @encrypt_tlen: total data size handled by encrypt requests
- * @decrypt_cnt: number of decrypt requests
- * @decrypt_tlen: total data size handled by decrypt requests
- * @err_cnt: number of error for AEAD requests
- */
- struct crypto_istat_aead {
- atomic64_t encrypt_cnt;
- atomic64_t encrypt_tlen;
- atomic64_t decrypt_cnt;
- atomic64_t decrypt_tlen;
- atomic64_t err_cnt;
- };
- /*
- * struct crypto_istat_akcipher - statistics for akcipher algorithm
- * @encrypt_cnt: number of encrypt requests
- * @encrypt_tlen: total data size handled by encrypt requests
- * @decrypt_cnt: number of decrypt requests
- * @decrypt_tlen: total data size handled by decrypt requests
- * @verify_cnt: number of verify operation
- * @sign_cnt: number of sign requests
- * @err_cnt: number of error for akcipher requests
- */
- struct crypto_istat_akcipher {
- atomic64_t encrypt_cnt;
- atomic64_t encrypt_tlen;
- atomic64_t decrypt_cnt;
- atomic64_t decrypt_tlen;
- atomic64_t verify_cnt;
- atomic64_t sign_cnt;
- atomic64_t err_cnt;
- };
- /*
- * struct crypto_istat_cipher - statistics for cipher algorithm
- * @encrypt_cnt: number of encrypt requests
- * @encrypt_tlen: total data size handled by encrypt requests
- * @decrypt_cnt: number of decrypt requests
- * @decrypt_tlen: total data size handled by decrypt requests
- * @err_cnt: number of error for cipher requests
- */
- struct crypto_istat_cipher {
- atomic64_t encrypt_cnt;
- atomic64_t encrypt_tlen;
- atomic64_t decrypt_cnt;
- atomic64_t decrypt_tlen;
- atomic64_t err_cnt;
- };
- /*
- * struct crypto_istat_compress - statistics for compress algorithm
- * @compress_cnt: number of compress requests
- * @compress_tlen: total data size handled by compress requests
- * @decompress_cnt: number of decompress requests
- * @decompress_tlen: total data size handled by decompress requests
- * @err_cnt: number of error for compress requests
- */
- struct crypto_istat_compress {
- atomic64_t compress_cnt;
- atomic64_t compress_tlen;
- atomic64_t decompress_cnt;
- atomic64_t decompress_tlen;
- atomic64_t err_cnt;
- };
- /*
- * struct crypto_istat_hash - statistics for has algorithm
- * @hash_cnt: number of hash requests
- * @hash_tlen: total data size hashed
- * @err_cnt: number of error for hash requests
- */
- struct crypto_istat_hash {
- atomic64_t hash_cnt;
- atomic64_t hash_tlen;
- atomic64_t err_cnt;
- };
- /*
- * struct crypto_istat_kpp - statistics for KPP algorithm
- * @setsecret_cnt: number of setsecrey operation
- * @generate_public_key_cnt: number of generate_public_key operation
- * @compute_shared_secret_cnt: number of compute_shared_secret operation
- * @err_cnt: number of error for KPP requests
- */
- struct crypto_istat_kpp {
- atomic64_t setsecret_cnt;
- atomic64_t generate_public_key_cnt;
- atomic64_t compute_shared_secret_cnt;
- atomic64_t err_cnt;
- };
- /*
- * struct crypto_istat_rng: statistics for RNG algorithm
- * @generate_cnt: number of RNG generate requests
- * @generate_tlen: total data size of generated data by the RNG
- * @seed_cnt: number of times the RNG was seeded
- * @err_cnt: number of error for RNG requests
- */
- struct crypto_istat_rng {
- atomic64_t generate_cnt;
- atomic64_t generate_tlen;
- atomic64_t seed_cnt;
- atomic64_t err_cnt;
- };
- #endif /* CONFIG_CRYPTO_STATS */
- #define cra_cipher cra_u.cipher
- #define cra_compress cra_u.compress
- /**
- * struct crypto_alg - definition of a cryptograpic cipher algorithm
- * @cra_flags: Flags describing this transformation. See include/linux/crypto.h
- * CRYPTO_ALG_* flags for the flags which go in here. Those are
- * used for fine-tuning the description of the transformation
- * algorithm.
- * @cra_blocksize: Minimum block size of this transformation. The size in bytes
- * of the smallest possible unit which can be transformed with
- * this algorithm. The users must respect this value.
- * In case of HASH transformation, it is possible for a smaller
- * block than @cra_blocksize to be passed to the crypto API for
- * transformation, in case of any other transformation type, an
- * error will be returned upon any attempt to transform smaller
- * than @cra_blocksize chunks.
- * @cra_ctxsize: Size of the operational context of the transformation. This
- * value informs the kernel crypto API about the memory size
- * needed to be allocated for the transformation context.
- * @cra_alignmask: Alignment mask for the input and output data buffer. The data
- * buffer containing the input data for the algorithm must be
- * aligned to this alignment mask. The data buffer for the
- * output data must be aligned to this alignment mask. Note that
- * the Crypto API will do the re-alignment in software, but
- * only under special conditions and there is a performance hit.
- * The re-alignment happens at these occasions for different
- * @cra_u types: cipher -- For both input data and output data
- * buffer; ahash -- For output hash destination buf; shash --
- * For output hash destination buf.
- * This is needed on hardware which is flawed by design and
- * cannot pick data from arbitrary addresses.
- * @cra_priority: Priority of this transformation implementation. In case
- * multiple transformations with same @cra_name are available to
- * the Crypto API, the kernel will use the one with highest
- * @cra_priority.
- * @cra_name: Generic name (usable by multiple implementations) of the
- * transformation algorithm. This is the name of the transformation
- * itself. This field is used by the kernel when looking up the
- * providers of particular transformation.
- * @cra_driver_name: Unique name of the transformation provider. This is the
- * name of the provider of the transformation. This can be any
- * arbitrary value, but in the usual case, this contains the
- * name of the chip or provider and the name of the
- * transformation algorithm.
- * @cra_type: Type of the cryptographic transformation. This is a pointer to
- * struct crypto_type, which implements callbacks common for all
- * transformation types. There are multiple options, such as
- * &crypto_skcipher_type, &crypto_ahash_type, &crypto_rng_type.
- * This field might be empty. In that case, there are no common
- * callbacks. This is the case for: cipher, compress, shash.
- * @cra_u: Callbacks implementing the transformation. This is a union of
- * multiple structures. Depending on the type of transformation selected
- * by @cra_type and @cra_flags above, the associated structure must be
- * filled with callbacks. This field might be empty. This is the case
- * for ahash, shash.
- * @cra_init: Initialize the cryptographic transformation object. This function
- * is used to initialize the cryptographic transformation object.
- * This function is called only once at the instantiation time, right
- * after the transformation context was allocated. In case the
- * cryptographic hardware has some special requirements which need to
- * be handled by software, this function shall check for the precise
- * requirement of the transformation and put any software fallbacks
- * in place.
- * @cra_exit: Deinitialize the cryptographic transformation object. This is a
- * counterpart to @cra_init, used to remove various changes set in
- * @cra_init.
- * @cra_u.cipher: Union member which contains a single-block symmetric cipher
- * definition. See @struct @cipher_alg.
- * @cra_u.compress: Union member which contains a (de)compression algorithm.
- * See @struct @compress_alg.
- * @cra_module: Owner of this transformation implementation. Set to THIS_MODULE
- * @cra_list: internally used
- * @cra_users: internally used
- * @cra_refcnt: internally used
- * @cra_destroy: internally used
- *
- * @stats: union of all possible crypto_istat_xxx structures
- * @stats.aead: statistics for AEAD algorithm
- * @stats.akcipher: statistics for akcipher algorithm
- * @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
- */
- static inline void *crypto_get_completion_data(crypto_completion_data_t *req)
- {
- return req->data;
- }
- 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;
- };
- /*
- * 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 */
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