1 /*
2  * Public Key Encryption
3  *
4  * Copyright (c) 2015, Intel Corporation
5  * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  */
13 #ifndef _CRYPTO_AKCIPHER_INT_H
14 #define _CRYPTO_AKCIPHER_INT_H
15 #include <crypto/akcipher.h>
16 #include <crypto/algapi.h>
17 
18 struct akcipher_instance {
19 	void (*free)(struct akcipher_instance *inst);
20 	union {
21 		struct {
22 			char head[offsetof(struct akcipher_alg, base)];
23 			struct crypto_instance base;
24 		} s;
25 		struct akcipher_alg alg;
26 	};
27 };
28 
29 struct crypto_akcipher_spawn {
30 	struct crypto_spawn base;
31 };
32 
33 /*
34  * Transform internal helpers.
35  */
36 static inline void *akcipher_request_ctx(struct akcipher_request *req)
37 {
38 	return req->__ctx;
39 }
40 
41 static inline void akcipher_set_reqsize(struct crypto_akcipher *akcipher,
42 					unsigned int reqsize)
43 {
44 	crypto_akcipher_alg(akcipher)->reqsize = reqsize;
45 }
46 
47 static inline void *akcipher_tfm_ctx(struct crypto_akcipher *tfm)
48 {
49 	return tfm->base.__crt_ctx;
50 }
51 
52 static inline void akcipher_request_complete(struct akcipher_request *req,
53 					     int err)
54 {
55 	req->base.complete(&req->base, err);
56 }
57 
58 static inline const char *akcipher_alg_name(struct crypto_akcipher *tfm)
59 {
60 	return crypto_akcipher_tfm(tfm)->__crt_alg->cra_name;
61 }
62 
63 static inline struct crypto_instance *akcipher_crypto_instance(
64 		struct akcipher_instance *inst)
65 {
66 	return container_of(&inst->alg.base, struct crypto_instance, alg);
67 }
68 
69 static inline struct akcipher_instance *akcipher_instance(
70 		struct crypto_instance *inst)
71 {
72 	return container_of(&inst->alg, struct akcipher_instance, alg.base);
73 }
74 
75 static inline struct akcipher_instance *akcipher_alg_instance(
76 		struct crypto_akcipher *akcipher)
77 {
78 	return akcipher_instance(crypto_tfm_alg_instance(&akcipher->base));
79 }
80 
81 static inline void *akcipher_instance_ctx(struct akcipher_instance *inst)
82 {
83 	return crypto_instance_ctx(akcipher_crypto_instance(inst));
84 }
85 
86 static inline void crypto_set_akcipher_spawn(
87 		struct crypto_akcipher_spawn *spawn,
88 		struct crypto_instance *inst)
89 {
90 	crypto_set_spawn(&spawn->base, inst);
91 }
92 
93 int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name,
94 		u32 type, u32 mask);
95 
96 static inline struct crypto_akcipher *crypto_spawn_akcipher(
97 		struct crypto_akcipher_spawn *spawn)
98 {
99 	return crypto_spawn_tfm2(&spawn->base);
100 }
101 
102 static inline void crypto_drop_akcipher(struct crypto_akcipher_spawn *spawn)
103 {
104 	crypto_drop_spawn(&spawn->base);
105 }
106 
107 static inline struct akcipher_alg *crypto_spawn_akcipher_alg(
108 		struct crypto_akcipher_spawn *spawn)
109 {
110 	return container_of(spawn->base.alg, struct akcipher_alg, base);
111 }
112 
113 /**
114  * crypto_register_akcipher() -- Register public key algorithm
115  *
116  * Function registers an implementation of a public key verify algorithm
117  *
118  * @alg:	algorithm definition
119  *
120  * Return: zero on success; error code in case of error
121  */
122 int crypto_register_akcipher(struct akcipher_alg *alg);
123 
124 /**
125  * crypto_unregister_akcipher() -- Unregister public key algorithm
126  *
127  * Function unregisters an implementation of a public key verify algorithm
128  *
129  * @alg:	algorithm definition
130  */
131 void crypto_unregister_akcipher(struct akcipher_alg *alg);
132 
133 /**
134  * akcipher_register_instance() -- Unregister public key template instance
135  *
136  * Function registers an implementation of an asymmetric key algorithm
137  * created from a template
138  *
139  * @tmpl:	the template from which the algorithm was created
140  * @inst:	the template instance
141  */
142 int akcipher_register_instance(struct crypto_template *tmpl,
143 		struct akcipher_instance *inst);
144 #endif
145