diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/crypto/acompress.h | 42 | ||||
| -rw-r--r-- | include/crypto/internal/acompress.h | 15 | ||||
| -rw-r--r-- | include/crypto/internal/scompress.h | 136 | ||||
| -rw-r--r-- | include/linux/crypto.h | 2 |
4 files changed, 168 insertions, 27 deletions
diff --git a/include/crypto/acompress.h b/include/crypto/acompress.h index 14c70d887160..e328b52425a8 100644 --- a/include/crypto/acompress.h +++ b/include/crypto/acompress.h @@ -42,9 +42,18 @@ struct acomp_req { * struct crypto_acomp - user-instantiated objects which encapsulate * algorithms and core processing logic * - * @base: Common crypto API algorithm data structure + * @compress: Function performs a compress operation + * @decompress: Function performs a de-compress operation + * @dst_free: Frees destination buffer if allocated inside the + * algorithm + * @reqsize: Context size for (de)compression requests + * @base: Common crypto API algorithm data structure */ struct crypto_acomp { + int (*compress)(struct acomp_req *req); + int (*decompress)(struct acomp_req *req); + void (*dst_free)(struct scatterlist *dst); + unsigned int reqsize; struct crypto_tfm base; }; @@ -125,7 +134,7 @@ static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm) static inline unsigned int crypto_acomp_reqsize(struct crypto_acomp *tfm) { - return crypto_acomp_alg(tfm)->reqsize; + return tfm->reqsize; } static inline void acomp_request_set_tfm(struct acomp_req *req, @@ -165,16 +174,7 @@ static inline int crypto_has_acomp(const char *alg_name, u32 type, u32 mask) * * Return: allocated handle in case of success or NULL in case of an error */ -static inline struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm) -{ - struct acomp_req *req; - - req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), GFP_KERNEL); - if (likely(req)) - acomp_request_set_tfm(req, tfm); - - return req; -} +struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm); /** * acomp_request_free() -- zeroize and free asynchronous (de)compression @@ -183,17 +183,7 @@ static inline struct acomp_req *acomp_request_alloc(struct crypto_acomp *tfm) * * @req: request to free */ -static inline void acomp_request_free(struct acomp_req *req) -{ - struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); - struct acomp_alg *alg = crypto_acomp_alg(tfm); - - if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) { - alg->dst_free(req->dst); - req->dst = NULL; - } - kzfree(req); -} +void acomp_request_free(struct acomp_req *req); /** * acomp_request_set_callback() -- Sets an asynchronous callback @@ -256,9 +246,8 @@ static inline void acomp_request_set_params(struct acomp_req *req, static inline int crypto_acomp_compress(struct acomp_req *req) { struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); - struct acomp_alg *alg = crypto_acomp_alg(tfm); - return alg->compress(req); + return tfm->compress(req); } /** @@ -273,9 +262,8 @@ static inline int crypto_acomp_compress(struct acomp_req *req) static inline int crypto_acomp_decompress(struct acomp_req *req) { struct crypto_acomp *tfm = crypto_acomp_reqtfm(req); - struct acomp_alg *alg = crypto_acomp_alg(tfm); - return alg->decompress(req); + return tfm->decompress(req); } #endif diff --git a/include/crypto/internal/acompress.h b/include/crypto/internal/acompress.h index a9a9000d1aea..1de2b5af12d7 100644 --- a/include/crypto/internal/acompress.h +++ b/include/crypto/internal/acompress.h @@ -39,6 +39,21 @@ static inline const char *acomp_alg_name(struct crypto_acomp *tfm) return crypto_acomp_tfm(tfm)->__crt_alg->cra_name; } +static inline struct acomp_req *__acomp_request_alloc(struct crypto_acomp *tfm) +{ + struct acomp_req *req; + + req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), GFP_KERNEL); + if (likely(req)) + acomp_request_set_tfm(req, tfm); + return req; +} + +static inline void __acomp_request_free(struct acomp_req *req) +{ + kzfree(req); +} + /** * crypto_register_acomp() -- Register asynchronous compression algorithm * diff --git a/include/crypto/internal/scompress.h b/include/crypto/internal/scompress.h new file mode 100644 index 000000000000..3fda3c5655a0 --- /dev/null +++ b/include/crypto/internal/scompress.h @@ -0,0 +1,136 @@ +/* + * Synchronous Compression operations + * + * Copyright 2015 LG Electronics Inc. + * Copyright (c) 2016, Intel Corporation + * Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ +#ifndef _CRYPTO_SCOMP_INT_H +#define _CRYPTO_SCOMP_INT_H +#include <linux/crypto.h> + +#define SCOMP_SCRATCH_SIZE 131072 + +struct crypto_scomp { + struct crypto_tfm base; +}; + +/** + * struct scomp_alg - synchronous compression algorithm + * + * @alloc_ctx: Function allocates algorithm specific context + * @free_ctx: Function frees context allocated with alloc_ctx + * @compress: Function performs a compress operation + * @decompress: Function performs a de-compress operation + * @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. + * @exit: Deinitialize the cryptographic transformation object. This is a + * counterpart to @init, used to remove various changes set in + * @init. + * @base: Common crypto API algorithm data structure + */ +struct scomp_alg { + void *(*alloc_ctx)(struct crypto_scomp *tfm); + void (*free_ctx)(struct crypto_scomp *tfm, void *ctx); + int (*compress)(struct crypto_scomp *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int *dlen, + void *ctx); + int (*decompress)(struct crypto_scomp *tfm, const u8 *src, + unsigned int slen, u8 *dst, unsigned int *dlen, + void *ctx); + struct crypto_alg base; +}; + +static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg) +{ + return container_of(alg, struct scomp_alg, base); +} + +static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm) +{ + return container_of(tfm, struct crypto_scomp, base); +} + +static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm) +{ + return &tfm->base; +} + +static inline void crypto_free_scomp(struct crypto_scomp *tfm) +{ + crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm)); +} + +static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm) +{ + return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg); +} + +static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm) +{ + return crypto_scomp_alg(tfm)->alloc_ctx(tfm); +} + +static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm, + void *ctx) +{ + return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx); +} + +static inline int crypto_scomp_compress(struct crypto_scomp *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, void *ctx) +{ + return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx); +} + +static inline int crypto_scomp_decompress(struct crypto_scomp *tfm, + const u8 *src, unsigned int slen, + u8 *dst, unsigned int *dlen, + void *ctx) +{ + return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen, + ctx); +} + +int crypto_init_scomp_ops_async(struct crypto_tfm *tfm); +struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req); +void crypto_acomp_scomp_free_ctx(struct acomp_req *req); + +/** + * crypto_register_scomp() -- Register synchronous compression algorithm + * + * Function registers an implementation of a synchronous + * compression algorithm + * + * @alg: algorithm definition + * + * Return: zero on success; error code in case of error + */ +int crypto_register_scomp(struct scomp_alg *alg); + +/** + * crypto_unregister_scomp() -- Unregister synchronous compression algorithm + * + * Function unregisters an implementation of a synchronous + * compression algorithm + * + * @alg: algorithm definition + * + * Return: zero on success; error code in case of error + */ +int crypto_unregister_scomp(struct scomp_alg *alg); + +#endif diff --git a/include/linux/crypto.h b/include/linux/crypto.h index dc57a0505505..8348d83d8b5e 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -51,6 +51,7 @@ #define CRYPTO_ALG_TYPE_GIVCIPHER 0x00000006 #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_DIGEST 0x0000000e @@ -61,6 +62,7 @@ #define CRYPTO_ALG_TYPE_HASH_MASK 0x0000000e #define CRYPTO_ALG_TYPE_AHASH_MASK 0x0000000e #define CRYPTO_ALG_TYPE_BLKCIPHER_MASK 0x0000000c +#define CRYPTO_ALG_TYPE_ACOMPRESS_MASK 0x0000000e #define CRYPTO_ALG_LARVAL 0x00000010 #define CRYPTO_ALG_DEAD 0x00000020 |