1 /*
2  * Symmetric key ciphers.
3  *
4  * Copyright (c) 2007 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 
13 #ifndef _CRYPTO_INTERNAL_SKCIPHER_H
14 #define _CRYPTO_INTERNAL_SKCIPHER_H
15 
16 #include <crypto/algapi.h>
17 #include <crypto/skcipher.h>
18 #include <linux/types.h>
19 
20 struct rtattr;
21 
22 struct skcipher_instance {
23 	void (*free)(struct skcipher_instance *inst);
24 	union {
25 		struct {
26 			char head[offsetof(struct skcipher_alg, base)];
27 			struct crypto_instance base;
28 		} s;
29 		struct skcipher_alg alg;
30 	};
31 };
32 
33 struct crypto_skcipher_spawn {
34 	struct crypto_spawn base;
35 };
36 
37 extern const struct crypto_type crypto_givcipher_type;
38 
39 static inline struct crypto_instance *skcipher_crypto_instance(
40 	struct skcipher_instance *inst)
41 {
42 	return &inst->s.base;
43 }
44 
45 static inline struct skcipher_instance *skcipher_alg_instance(
46 	struct crypto_skcipher *skcipher)
47 {
48 	return container_of(crypto_skcipher_alg(skcipher),
49 			    struct skcipher_instance, alg);
50 }
51 
52 static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
53 {
54 	return crypto_instance_ctx(skcipher_crypto_instance(inst));
55 }
56 
57 static inline void skcipher_request_complete(struct skcipher_request *req, int err)
58 {
59 	req->base.complete(&req->base, err);
60 }
61 
62 static inline void crypto_set_skcipher_spawn(
63 	struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
64 {
65 	crypto_set_spawn(&spawn->base, inst);
66 }
67 
68 int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
69 			 u32 type, u32 mask);
70 
71 static inline int crypto_grab_skcipher2(struct crypto_skcipher_spawn *spawn,
72 					const char *name, u32 type, u32 mask)
73 {
74 	return crypto_grab_skcipher(spawn, name, type, mask);
75 }
76 
77 struct crypto_alg *crypto_lookup_skcipher(const char *name, u32 type, u32 mask);
78 
79 static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
80 {
81 	crypto_drop_spawn(&spawn->base);
82 }
83 
84 static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
85 	struct crypto_skcipher_spawn *spawn)
86 {
87 	return container_of(spawn->base.alg, struct skcipher_alg, base);
88 }
89 
90 static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
91 	struct crypto_skcipher_spawn *spawn)
92 {
93 	return crypto_skcipher_spawn_alg(spawn);
94 }
95 
96 static inline struct crypto_skcipher *crypto_spawn_skcipher(
97 	struct crypto_skcipher_spawn *spawn)
98 {
99 	return crypto_spawn_tfm2(&spawn->base);
100 }
101 
102 static inline struct crypto_skcipher *crypto_spawn_skcipher2(
103 	struct crypto_skcipher_spawn *spawn)
104 {
105 	return crypto_spawn_skcipher(spawn);
106 }
107 
108 static inline void crypto_skcipher_set_reqsize(
109 	struct crypto_skcipher *skcipher, unsigned int reqsize)
110 {
111 	skcipher->reqsize = reqsize;
112 }
113 
114 int crypto_register_skcipher(struct skcipher_alg *alg);
115 void crypto_unregister_skcipher(struct skcipher_alg *alg);
116 int crypto_register_skciphers(struct skcipher_alg *algs, int count);
117 void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
118 int skcipher_register_instance(struct crypto_template *tmpl,
119 			       struct skcipher_instance *inst);
120 
121 static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
122 					       int err)
123 {
124 	req->base.complete(&req->base, err);
125 }
126 
127 static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
128 {
129 	return req->base.flags;
130 }
131 
132 static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
133 {
134 	return crypto_tfm_ctx(&tfm->base);
135 }
136 
137 static inline void *skcipher_request_ctx(struct skcipher_request *req)
138 {
139 	return req->__ctx;
140 }
141 
142 static inline u32 skcipher_request_flags(struct skcipher_request *req)
143 {
144 	return req->base.flags;
145 }
146 
147 static inline unsigned int crypto_skcipher_alg_min_keysize(
148 	struct skcipher_alg *alg)
149 {
150 	if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
151 	    CRYPTO_ALG_TYPE_BLKCIPHER)
152 		return alg->base.cra_blkcipher.min_keysize;
153 
154 	if (alg->base.cra_ablkcipher.encrypt)
155 		return alg->base.cra_ablkcipher.min_keysize;
156 
157 	return alg->min_keysize;
158 }
159 
160 static inline unsigned int crypto_skcipher_alg_max_keysize(
161 	struct skcipher_alg *alg)
162 {
163 	if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
164 	    CRYPTO_ALG_TYPE_BLKCIPHER)
165 		return alg->base.cra_blkcipher.max_keysize;
166 
167 	if (alg->base.cra_ablkcipher.encrypt)
168 		return alg->base.cra_ablkcipher.max_keysize;
169 
170 	return alg->max_keysize;
171 }
172 
173 #endif	/* _CRYPTO_INTERNAL_SKCIPHER_H */
174 
175