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a1d2f095 GU |
1 | /* |
2 | * Compress: Compression algorithms under the cryptographic API. | |
3 | * | |
4 | * Copyright 2008 Sony Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; version 2 of the License. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. | |
17 | * If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef _CRYPTO_COMPRESS_H | |
21 | #define _CRYPTO_COMPRESS_H | |
22 | ||
23 | #include <linux/crypto.h> | |
24 | ||
25 | ||
26 | struct comp_request { | |
27 | const void *next_in; /* next input byte */ | |
28 | void *next_out; /* next output byte */ | |
29 | unsigned int avail_in; /* bytes available at next_in */ | |
30 | unsigned int avail_out; /* bytes available at next_out */ | |
31 | }; | |
32 | ||
bf68e65e GU |
33 | enum zlib_comp_params { |
34 | ZLIB_COMP_LEVEL = 1, /* e.g. Z_DEFAULT_COMPRESSION */ | |
35 | ZLIB_COMP_METHOD, /* e.g. Z_DEFLATED */ | |
36 | ZLIB_COMP_WINDOWBITS, /* e.g. MAX_WBITS */ | |
37 | ZLIB_COMP_MEMLEVEL, /* e.g. DEF_MEM_LEVEL */ | |
38 | ZLIB_COMP_STRATEGY, /* e.g. Z_DEFAULT_STRATEGY */ | |
39 | __ZLIB_COMP_MAX, | |
40 | }; | |
41 | ||
42 | #define ZLIB_COMP_MAX (__ZLIB_COMP_MAX - 1) | |
43 | ||
44 | ||
45 | enum zlib_decomp_params { | |
46 | ZLIB_DECOMP_WINDOWBITS = 1, /* e.g. DEF_WBITS */ | |
47 | __ZLIB_DECOMP_MAX, | |
48 | }; | |
49 | ||
50 | #define ZLIB_DECOMP_MAX (__ZLIB_DECOMP_MAX - 1) | |
51 | ||
52 | ||
a1d2f095 GU |
53 | struct crypto_pcomp { |
54 | struct crypto_tfm base; | |
55 | }; | |
56 | ||
57 | struct pcomp_alg { | |
58 | int (*compress_setup)(struct crypto_pcomp *tfm, void *params, | |
59 | unsigned int len); | |
60 | int (*compress_init)(struct crypto_pcomp *tfm); | |
61 | int (*compress_update)(struct crypto_pcomp *tfm, | |
62 | struct comp_request *req); | |
63 | int (*compress_final)(struct crypto_pcomp *tfm, | |
64 | struct comp_request *req); | |
65 | int (*decompress_setup)(struct crypto_pcomp *tfm, void *params, | |
66 | unsigned int len); | |
67 | int (*decompress_init)(struct crypto_pcomp *tfm); | |
68 | int (*decompress_update)(struct crypto_pcomp *tfm, | |
69 | struct comp_request *req); | |
70 | int (*decompress_final)(struct crypto_pcomp *tfm, | |
71 | struct comp_request *req); | |
72 | ||
73 | struct crypto_alg base; | |
74 | }; | |
75 | ||
76 | extern struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type, | |
77 | u32 mask); | |
78 | ||
79 | static inline struct crypto_tfm *crypto_pcomp_tfm(struct crypto_pcomp *tfm) | |
80 | { | |
81 | return &tfm->base; | |
82 | } | |
83 | ||
84 | static inline void crypto_free_pcomp(struct crypto_pcomp *tfm) | |
85 | { | |
86 | crypto_destroy_tfm(tfm, crypto_pcomp_tfm(tfm)); | |
87 | } | |
88 | ||
89 | static inline struct pcomp_alg *__crypto_pcomp_alg(struct crypto_alg *alg) | |
90 | { | |
91 | return container_of(alg, struct pcomp_alg, base); | |
92 | } | |
93 | ||
94 | static inline struct pcomp_alg *crypto_pcomp_alg(struct crypto_pcomp *tfm) | |
95 | { | |
96 | return __crypto_pcomp_alg(crypto_pcomp_tfm(tfm)->__crt_alg); | |
97 | } | |
98 | ||
99 | static inline int crypto_compress_setup(struct crypto_pcomp *tfm, | |
100 | void *params, unsigned int len) | |
101 | { | |
102 | return crypto_pcomp_alg(tfm)->compress_setup(tfm, params, len); | |
103 | } | |
104 | ||
105 | static inline int crypto_compress_init(struct crypto_pcomp *tfm) | |
106 | { | |
107 | return crypto_pcomp_alg(tfm)->compress_init(tfm); | |
108 | } | |
109 | ||
110 | static inline int crypto_compress_update(struct crypto_pcomp *tfm, | |
111 | struct comp_request *req) | |
112 | { | |
113 | return crypto_pcomp_alg(tfm)->compress_update(tfm, req); | |
114 | } | |
115 | ||
116 | static inline int crypto_compress_final(struct crypto_pcomp *tfm, | |
117 | struct comp_request *req) | |
118 | { | |
119 | return crypto_pcomp_alg(tfm)->compress_final(tfm, req); | |
120 | } | |
121 | ||
122 | static inline int crypto_decompress_setup(struct crypto_pcomp *tfm, | |
123 | void *params, unsigned int len) | |
124 | { | |
125 | return crypto_pcomp_alg(tfm)->decompress_setup(tfm, params, len); | |
126 | } | |
127 | ||
128 | static inline int crypto_decompress_init(struct crypto_pcomp *tfm) | |
129 | { | |
130 | return crypto_pcomp_alg(tfm)->decompress_init(tfm); | |
131 | } | |
132 | ||
133 | static inline int crypto_decompress_update(struct crypto_pcomp *tfm, | |
134 | struct comp_request *req) | |
135 | { | |
136 | return crypto_pcomp_alg(tfm)->decompress_update(tfm, req); | |
137 | } | |
138 | ||
139 | static inline int crypto_decompress_final(struct crypto_pcomp *tfm, | |
140 | struct comp_request *req) | |
141 | { | |
142 | return crypto_pcomp_alg(tfm)->decompress_final(tfm, req); | |
143 | } | |
144 | ||
145 | #endif /* _CRYPTO_COMPRESS_H */ |