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 crypto_skcipher_spawn {
23 	struct crypto_spawn base;
24 };
25 
26 extern const struct crypto_type crypto_givcipher_type;
27 
28 static inline void crypto_set_skcipher_spawn(
29 	struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
30 {
31 	crypto_set_spawn(&spawn->base, inst);
32 }
33 
34 int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
35 			 u32 type, u32 mask);
36 
37 struct crypto_alg *crypto_lookup_skcipher(const char *name, u32 type, u32 mask);
38 
39 static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
40 {
41 	crypto_drop_spawn(&spawn->base);
42 }
43 
44 static inline struct crypto_alg *crypto_skcipher_spawn_alg(
45 	struct crypto_skcipher_spawn *spawn)
46 {
47 	return spawn->base.alg;
48 }
49 
50 static inline struct crypto_ablkcipher *crypto_spawn_skcipher(
51 	struct crypto_skcipher_spawn *spawn)
52 {
53 	return __crypto_ablkcipher_cast(
54 		crypto_spawn_tfm(&spawn->base, crypto_skcipher_type(0),
55 				 crypto_skcipher_mask(0)));
56 }
57 
58 int skcipher_null_givencrypt(struct skcipher_givcrypt_request *req);
59 int skcipher_null_givdecrypt(struct skcipher_givcrypt_request *req);
60 const char *crypto_default_geniv(const struct crypto_alg *alg);
61 
62 struct crypto_instance *skcipher_geniv_alloc(struct crypto_template *tmpl,
63 					     struct rtattr **tb, u32 type,
64 					     u32 mask);
65 void skcipher_geniv_free(struct crypto_instance *inst);
66 int skcipher_geniv_init(struct crypto_tfm *tfm);
67 void skcipher_geniv_exit(struct crypto_tfm *tfm);
68 
69 static inline struct crypto_ablkcipher *skcipher_geniv_cipher(
70 	struct crypto_ablkcipher *geniv)
71 {
72 	return crypto_ablkcipher_crt(geniv)->base;
73 }
74 
75 static inline int skcipher_enqueue_givcrypt(
76 	struct crypto_queue *queue, struct skcipher_givcrypt_request *request)
77 {
78 	return ablkcipher_enqueue_request(queue, &request->creq);
79 }
80 
81 static inline struct skcipher_givcrypt_request *skcipher_dequeue_givcrypt(
82 	struct crypto_queue *queue)
83 {
84 	return skcipher_givcrypt_cast(crypto_dequeue_request(queue));
85 }
86 
87 static inline void *skcipher_givcrypt_reqctx(
88 	struct skcipher_givcrypt_request *req)
89 {
90 	return ablkcipher_request_ctx(&req->creq);
91 }
92 
93 static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
94 					       int err)
95 {
96 	req->base.complete(&req->base, err);
97 }
98 
99 static inline void skcipher_givcrypt_complete(
100 	struct skcipher_givcrypt_request *req, int err)
101 {
102 	ablkcipher_request_complete(&req->creq, err);
103 }
104 
105 static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
106 {
107 	return req->base.flags;
108 }
109 
110 static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
111 {
112 	return crypto_tfm_ctx(&tfm->base);
113 }
114 
115 static inline void *skcipher_request_ctx(struct skcipher_request *req)
116 {
117 	return req->__ctx;
118 }
119 
120 static inline u32 skcipher_request_flags(struct skcipher_request *req)
121 {
122 	return req->base.flags;
123 }
124 
125 #endif	/* _CRYPTO_INTERNAL_SKCIPHER_H */
126 
127