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cce9e06d HX |
1 | /* |
2 | * Cryptographic API for algorithms (i.e., low-level API). | |
3 | * | |
4 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | #ifndef _CRYPTO_ALGAPI_H | |
13 | #define _CRYPTO_ALGAPI_H | |
14 | ||
15 | #include <linux/crypto.h> | |
16 | ||
4cc7720c | 17 | struct module; |
ebc610e5 | 18 | struct rtattr; |
e853c3cf HX |
19 | struct seq_file; |
20 | ||
21 | struct crypto_type { | |
27d2a330 HX |
22 | unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
23 | int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); | |
e853c3cf HX |
24 | void (*exit)(struct crypto_tfm *tfm); |
25 | void (*show)(struct seq_file *m, struct crypto_alg *alg); | |
26 | }; | |
4cc7720c HX |
27 | |
28 | struct crypto_instance { | |
29 | struct crypto_alg alg; | |
30 | ||
31 | struct crypto_template *tmpl; | |
32 | struct hlist_node list; | |
33 | ||
34 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
35 | }; | |
36 | ||
37 | struct crypto_template { | |
38 | struct list_head list; | |
39 | struct hlist_head instances; | |
40 | struct module *module; | |
41 | ||
ebc610e5 | 42 | struct crypto_instance *(*alloc)(struct rtattr **tb); |
4cc7720c HX |
43 | void (*free)(struct crypto_instance *inst); |
44 | ||
45 | char name[CRYPTO_MAX_ALG_NAME]; | |
46 | }; | |
47 | ||
6bfd4809 HX |
48 | struct crypto_spawn { |
49 | struct list_head list; | |
50 | struct crypto_alg *alg; | |
51 | struct crypto_instance *inst; | |
52 | }; | |
53 | ||
5c64097a HX |
54 | struct scatter_walk { |
55 | struct scatterlist *sg; | |
56 | unsigned int offset; | |
57 | }; | |
58 | ||
5cde0af2 HX |
59 | struct blkcipher_walk { |
60 | union { | |
61 | struct { | |
62 | struct page *page; | |
63 | unsigned long offset; | |
64 | } phys; | |
65 | ||
66 | struct { | |
67 | u8 *page; | |
68 | u8 *addr; | |
69 | } virt; | |
70 | } src, dst; | |
71 | ||
72 | struct scatter_walk in; | |
73 | unsigned int nbytes; | |
74 | ||
75 | struct scatter_walk out; | |
76 | unsigned int total; | |
77 | ||
78 | void *page; | |
79 | u8 *buffer; | |
80 | u8 *iv; | |
81 | ||
82 | int flags; | |
83 | }; | |
84 | ||
85 | extern const struct crypto_type crypto_blkcipher_type; | |
055bcee3 | 86 | extern const struct crypto_type crypto_hash_type; |
5cde0af2 | 87 | |
db131ef9 HX |
88 | void crypto_mod_put(struct crypto_alg *alg); |
89 | ||
4cc7720c HX |
90 | int crypto_register_template(struct crypto_template *tmpl); |
91 | void crypto_unregister_template(struct crypto_template *tmpl); | |
92 | struct crypto_template *crypto_lookup_template(const char *name); | |
93 | ||
6bfd4809 HX |
94 | int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
95 | struct crypto_instance *inst); | |
96 | void crypto_drop_spawn(struct crypto_spawn *spawn); | |
2e306ee0 HX |
97 | struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
98 | u32 mask); | |
6bfd4809 | 99 | |
ebc610e5 HX |
100 | struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
101 | int crypto_check_attr_type(struct rtattr **tb, u32 type); | |
102 | struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, u32 type, u32 mask); | |
7fed0bf2 HX |
103 | struct crypto_instance *crypto_alloc_instance(const char *name, |
104 | struct crypto_alg *alg); | |
105 | ||
5cde0af2 HX |
106 | int blkcipher_walk_done(struct blkcipher_desc *desc, |
107 | struct blkcipher_walk *walk, int err); | |
108 | int blkcipher_walk_virt(struct blkcipher_desc *desc, | |
109 | struct blkcipher_walk *walk); | |
110 | int blkcipher_walk_phys(struct blkcipher_desc *desc, | |
111 | struct blkcipher_walk *walk); | |
112 | ||
113 | static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) | |
114 | { | |
115 | unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm); | |
116 | unsigned long align = crypto_tfm_alg_alignmask(tfm); | |
117 | ||
118 | if (align <= crypto_tfm_ctx_alignment()) | |
119 | align = 1; | |
120 | return (void *)ALIGN(addr, align); | |
121 | } | |
122 | ||
4cc7720c HX |
123 | static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
124 | { | |
125 | return inst->__ctx; | |
126 | } | |
127 | ||
5cde0af2 HX |
128 | static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) |
129 | { | |
130 | return crypto_tfm_ctx(&tfm->base); | |
131 | } | |
132 | ||
133 | static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) | |
134 | { | |
135 | return crypto_tfm_ctx_aligned(&tfm->base); | |
136 | } | |
137 | ||
2e306ee0 HX |
138 | static inline struct crypto_cipher *crypto_spawn_cipher( |
139 | struct crypto_spawn *spawn) | |
140 | { | |
141 | u32 type = CRYPTO_ALG_TYPE_CIPHER; | |
142 | u32 mask = CRYPTO_ALG_TYPE_MASK; | |
143 | ||
144 | return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
145 | } | |
146 | ||
f28776a3 HX |
147 | static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) |
148 | { | |
149 | return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; | |
150 | } | |
151 | ||
2e306ee0 HX |
152 | static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn) |
153 | { | |
154 | u32 type = CRYPTO_ALG_TYPE_HASH; | |
155 | u32 mask = CRYPTO_ALG_TYPE_HASH_MASK; | |
156 | ||
157 | return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask)); | |
158 | } | |
159 | ||
055bcee3 HX |
160 | static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm) |
161 | { | |
162 | return crypto_tfm_ctx_aligned(&tfm->base); | |
163 | } | |
164 | ||
5cde0af2 HX |
165 | static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
166 | struct scatterlist *dst, | |
167 | struct scatterlist *src, | |
168 | unsigned int nbytes) | |
169 | { | |
170 | walk->in.sg = src; | |
171 | walk->out.sg = dst; | |
172 | walk->total = nbytes; | |
173 | } | |
174 | ||
cce9e06d HX |
175 | #endif /* _CRYPTO_ALGAPI_H */ |
176 |