diff options
Diffstat (limited to 'include/linux/crypto.h')
| -rw-r--r-- | include/linux/crypto.h | 128 |
1 files changed, 55 insertions, 73 deletions
diff --git a/include/linux/crypto.h b/include/linux/crypto.h index b164da5e129e..b50f1954d1bb 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -13,7 +13,8 @@ #define _LINUX_CRYPTO_H #include <linux/completion.h> -#include <linux/refcount.h> +#include <linux/errno.h> +#include <linux/refcount_types.h> #include <linux/slab.h> #include <linux/types.h> @@ -22,7 +23,6 @@ */ #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_LSKCIPHER 0x00000004 #define CRYPTO_ALG_TYPE_SKCIPHER 0x00000005 @@ -50,6 +50,15 @@ #define CRYPTO_ALG_NEED_FALLBACK 0x00000100 /* + * Set if the algorithm data structure should be duplicated into + * kmalloc memory before registration. This is useful for hardware + * that can be disconnected at will. Do not use this if the data + * structure is embedded into a bigger one. Duplicate the overall + * data structure in the driver in that case. + */ +#define CRYPTO_ALG_DUP_FIRST 0x00000200 + +/* * 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. @@ -124,6 +133,11 @@ */ #define CRYPTO_ALG_FIPS_INTERNAL 0x00020000 +/* Set if the algorithm supports virtual addresses. */ +#define CRYPTO_ALG_REQ_VIRT 0x00040000 + +/* The high bits 0xff000000 are reserved for type-specific flags. */ + /* * Transform masks and values (for crt_flags). */ @@ -133,6 +147,7 @@ #define CRYPTO_TFM_REQ_FORBID_WEAK_KEYS 0x00000100 #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200 #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400 +#define CRYPTO_TFM_REQ_ON_STACK 0x00000800 /* * Miscellaneous stuff. @@ -239,26 +254,7 @@ struct cipher_alg { 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); -}; - #define cra_cipher cra_u.cipher -#define cra_compress cra_u.compress /** * struct crypto_alg - definition of a cryptograpic cipher algorithm @@ -291,6 +287,7 @@ struct compress_alg { * to the alignmask of the algorithm being used, in order to * avoid the API having to realign them. Note: the alignmask is * not supported for hash algorithms and is always 0 for them. + * @cra_reqsize: Size of the request context for this algorithm. * @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 @@ -309,27 +306,16 @@ struct compress_alg { * 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. + * callbacks. This is the case for: cipher. * @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_init: Deprecated, do not use. + * @cra_exit: Deprecated, do not use. * @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 @@ -348,6 +334,7 @@ struct crypto_alg { unsigned int cra_blocksize; unsigned int cra_ctxsize; unsigned int cra_alignmask; + unsigned int cra_reqsize; int cra_priority; refcount_t cra_refcnt; @@ -359,7 +346,6 @@ struct crypto_alg { union { struct cipher_alg cipher; - struct compress_alg compress; } cra_u; int (*cra_init)(struct crypto_tfm *tfm); @@ -425,18 +411,16 @@ struct crypto_tfm { u32 crt_flags; int node; - + + struct crypto_tfm *fb; + 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. */ @@ -472,6 +456,11 @@ static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm) return tfm->__crt_alg->cra_alignmask; } +static inline unsigned int crypto_tfm_alg_reqsize(struct crypto_tfm *tfm) +{ + return tfm->__crt_alg->cra_reqsize; +} + static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm) { return tfm->crt_flags; @@ -493,52 +482,45 @@ static inline unsigned int crypto_tfm_ctx_alignment(void) return __alignof__(tfm->__crt_ctx); } -static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm) +static inline bool crypto_tfm_is_async(struct crypto_tfm *tfm) { - return (struct crypto_comp *)tfm; + return tfm->__crt_alg->cra_flags & CRYPTO_ALG_ASYNC; } -static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name, - u32 type, u32 mask) +static inline bool crypto_req_on_stack(struct crypto_async_request *req) { - 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)); + return req->flags & CRYPTO_TFM_REQ_ON_STACK; } -static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm) +static inline void crypto_request_set_callback( + struct crypto_async_request *req, u32 flags, + crypto_completion_t compl, void *data) { - return &tfm->base; -} + u32 keep = CRYPTO_TFM_REQ_ON_STACK; -static inline void crypto_free_comp(struct crypto_comp *tfm) -{ - crypto_free_tfm(crypto_comp_tfm(tfm)); + req->complete = compl; + req->data = data; + req->flags &= keep; + req->flags |= flags & ~keep; } -static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask) +static inline void crypto_request_set_tfm(struct crypto_async_request *req, + struct crypto_tfm *tfm) { - type &= ~CRYPTO_ALG_TYPE_MASK; - type |= CRYPTO_ALG_TYPE_COMPRESS; - mask |= CRYPTO_ALG_TYPE_MASK; - - return crypto_has_alg(alg_name, type, mask); + req->tfm = tfm; + req->flags &= ~CRYPTO_TFM_REQ_ON_STACK; } -static inline const char *crypto_comp_name(struct crypto_comp *tfm) +struct crypto_async_request *crypto_request_clone( + struct crypto_async_request *req, size_t total, gfp_t gfp); + +static inline void crypto_stack_request_init(struct crypto_async_request *req, + struct crypto_tfm *tfm) { - return crypto_tfm_alg_name(crypto_comp_tfm(tfm)); + req->flags = 0; + crypto_request_set_tfm(req, tfm); + req->flags |= CRYPTO_TFM_REQ_ON_STACK; } -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 */ |