146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/*
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* Compress: Compression algorithms under the cryptographic API.
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*
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* Copyright 2008 Sony Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _CRYPTO_COMPRESS_H
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#define _CRYPTO_COMPRESS_H
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#include <linux/crypto.h>
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struct comp_request {
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const void *next_in; /* next input byte */
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void *next_out; /* next output byte */
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unsigned int avail_in; /* bytes available at next_in */
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unsigned int avail_out; /* bytes available at next_out */
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};
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enum zlib_comp_params {
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ZLIB_COMP_LEVEL = 1, /* e.g. Z_DEFAULT_COMPRESSION */
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ZLIB_COMP_METHOD, /* e.g. Z_DEFLATED */
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ZLIB_COMP_WINDOWBITS, /* e.g. MAX_WBITS */
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ZLIB_COMP_MEMLEVEL, /* e.g. DEF_MEM_LEVEL */
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ZLIB_COMP_STRATEGY, /* e.g. Z_DEFAULT_STRATEGY */
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__ZLIB_COMP_MAX,
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};
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#define ZLIB_COMP_MAX (__ZLIB_COMP_MAX - 1)
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enum zlib_decomp_params {
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ZLIB_DECOMP_WINDOWBITS = 1, /* e.g. DEF_WBITS */
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__ZLIB_DECOMP_MAX,
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};
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#define ZLIB_DECOMP_MAX (__ZLIB_DECOMP_MAX - 1)
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struct crypto_pcomp {
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struct crypto_tfm base;
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};
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struct pcomp_alg {
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int (*compress_setup)(struct crypto_pcomp *tfm, const void *params,
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unsigned int len);
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int (*compress_init)(struct crypto_pcomp *tfm);
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int (*compress_update)(struct crypto_pcomp *tfm,
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struct comp_request *req);
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int (*compress_final)(struct crypto_pcomp *tfm,
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struct comp_request *req);
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int (*decompress_setup)(struct crypto_pcomp *tfm, const void *params,
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unsigned int len);
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int (*decompress_init)(struct crypto_pcomp *tfm);
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int (*decompress_update)(struct crypto_pcomp *tfm,
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struct comp_request *req);
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int (*decompress_final)(struct crypto_pcomp *tfm,
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struct comp_request *req);
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struct crypto_alg base;
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};
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extern struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
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u32 mask);
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static inline struct crypto_tfm *crypto_pcomp_tfm(struct crypto_pcomp *tfm)
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{
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return &tfm->base;
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}
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static inline void crypto_free_pcomp(struct crypto_pcomp *tfm)
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{
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crypto_destroy_tfm(tfm, crypto_pcomp_tfm(tfm));
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}
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static inline struct pcomp_alg *__crypto_pcomp_alg(struct crypto_alg *alg)
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{
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return container_of(alg, struct pcomp_alg, base);
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}
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static inline struct pcomp_alg *crypto_pcomp_alg(struct crypto_pcomp *tfm)
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{
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return __crypto_pcomp_alg(crypto_pcomp_tfm(tfm)->__crt_alg);
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}
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static inline int crypto_compress_setup(struct crypto_pcomp *tfm,
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const void *params, unsigned int len)
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{
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return crypto_pcomp_alg(tfm)->compress_setup(tfm, params, len);
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}
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static inline int crypto_compress_init(struct crypto_pcomp *tfm)
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{
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return crypto_pcomp_alg(tfm)->compress_init(tfm);
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}
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static inline int crypto_compress_update(struct crypto_pcomp *tfm,
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struct comp_request *req)
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{
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return crypto_pcomp_alg(tfm)->compress_update(tfm, req);
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}
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static inline int crypto_compress_final(struct crypto_pcomp *tfm,
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struct comp_request *req)
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{
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return crypto_pcomp_alg(tfm)->compress_final(tfm, req);
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}
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static inline int crypto_decompress_setup(struct crypto_pcomp *tfm,
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const void *params, unsigned int len)
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{
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return crypto_pcomp_alg(tfm)->decompress_setup(tfm, params, len);
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}
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static inline int crypto_decompress_init(struct crypto_pcomp *tfm)
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{
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return crypto_pcomp_alg(tfm)->decompress_init(tfm);
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}
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static inline int crypto_decompress_update(struct crypto_pcomp *tfm,
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struct comp_request *req)
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{
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return crypto_pcomp_alg(tfm)->decompress_update(tfm, req);
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}
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static inline int crypto_decompress_final(struct crypto_pcomp *tfm,
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struct comp_request *req)
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{
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return crypto_pcomp_alg(tfm)->decompress_final(tfm, req);
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}
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#endif /* _CRYPTO_COMPRESS_H */
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