xref: /openbmc/linux/include/crypto/internal/aead.h (revision e2f1cf25) 
1 /*
2  * AEAD: Authenticated Encryption with Associated Data
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_AEAD_H
14 #define _CRYPTO_INTERNAL_AEAD_H
15 
16 #include <crypto/aead.h>
17 #include <crypto/algapi.h>
18 #include <linux/stddef.h>
19 #include <linux/types.h>
20 
21 struct rtattr;
22 
23 struct aead_instance {
24 	union {
25 		struct {
26 			char head[offsetof(struct aead_alg, base)];
27 			struct crypto_instance base;
28 		} s;
29 		struct aead_alg alg;
30 	};
31 };
32 
33 struct crypto_aead_spawn {
34 	struct crypto_spawn base;
35 };
36 
37 extern const struct crypto_type crypto_aead_type;
38 extern const struct crypto_type crypto_nivaead_type;
39 
40 static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
41 {
42 	return crypto_tfm_ctx(&tfm->base);
43 }
44 
45 static inline struct crypto_instance *crypto_aead_alg_instance(
46 	struct crypto_aead *aead)
47 {
48 	return crypto_tfm_alg_instance(&aead->base);
49 }
50 
51 static inline struct crypto_instance *aead_crypto_instance(
52 	struct aead_instance *inst)
53 {
54 	return container_of(&inst->alg.base, struct crypto_instance, alg);
55 }
56 
57 static inline struct aead_instance *aead_instance(struct crypto_instance *inst)
58 {
59 	return container_of(&inst->alg, struct aead_instance, alg.base);
60 }
61 
62 static inline struct aead_instance *aead_alg_instance(struct crypto_aead *aead)
63 {
64 	return aead_instance(crypto_aead_alg_instance(aead));
65 }
66 
67 static inline void *aead_instance_ctx(struct aead_instance *inst)
68 {
69 	return crypto_instance_ctx(aead_crypto_instance(inst));
70 }
71 
72 static inline void *aead_request_ctx(struct aead_request *req)
73 {
74 	return req->__ctx;
75 }
76 
77 static inline void aead_request_complete(struct aead_request *req, int err)
78 {
79 	req->base.complete(&req->base, err);
80 }
81 
82 static inline u32 aead_request_flags(struct aead_request *req)
83 {
84 	return req->base.flags;
85 }
86 
87 static inline void crypto_set_aead_spawn(
88 	struct crypto_aead_spawn *spawn, struct crypto_instance *inst)
89 {
90 	crypto_set_spawn(&spawn->base, inst);
91 }
92 
93 struct crypto_alg *crypto_lookup_aead(const char *name, u32 type, u32 mask);
94 
95 int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name,
96 		     u32 type, u32 mask);
97 
98 static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
99 {
100 	crypto_drop_spawn(&spawn->base);
101 }
102 
103 static inline struct crypto_alg *crypto_aead_spawn_alg(
104 	struct crypto_aead_spawn *spawn)
105 {
106 	return spawn->base.alg;
107 }
108 
109 static inline struct aead_alg *crypto_spawn_aead_alg(
110 	struct crypto_aead_spawn *spawn)
111 {
112 	return container_of(spawn->base.alg, struct aead_alg, base);
113 }
114 
115 static inline struct crypto_aead *crypto_spawn_aead(
116 	struct crypto_aead_spawn *spawn)
117 {
118 	return crypto_spawn_tfm2(&spawn->base);
119 }
120 
121 struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
122 				       struct rtattr **tb, u32 type, u32 mask);
123 void aead_geniv_free(struct aead_instance *inst);
124 int aead_geniv_init(struct crypto_tfm *tfm);
125 void aead_geniv_exit(struct crypto_tfm *tfm);
126 
127 static inline struct crypto_aead *aead_geniv_base(struct crypto_aead *geniv)
128 {
129 	return geniv->child;
130 }
131 
132 static inline void *aead_givcrypt_reqctx(struct aead_givcrypt_request *req)
133 {
134 	return aead_request_ctx(&req->areq);
135 }
136 
137 static inline void aead_givcrypt_complete(struct aead_givcrypt_request *req,
138 					  int err)
139 {
140 	aead_request_complete(&req->areq, err);
141 }
142 
143 static inline void crypto_aead_set_reqsize(struct crypto_aead *aead,
144 					   unsigned int reqsize)
145 {
146 	crypto_aead_crt(aead)->reqsize = reqsize;
147 }
148 
149 static inline unsigned int crypto_aead_alg_maxauthsize(struct aead_alg *alg)
150 {
151 	return alg->base.cra_aead.encrypt ? alg->base.cra_aead.maxauthsize :
152 					    alg->maxauthsize;
153 }
154 
155 static inline unsigned int crypto_aead_maxauthsize(struct crypto_aead *aead)
156 {
157 	return crypto_aead_alg_maxauthsize(crypto_aead_alg(aead));
158 }
159 
160 int crypto_register_aead(struct aead_alg *alg);
161 void crypto_unregister_aead(struct aead_alg *alg);
162 int crypto_register_aeads(struct aead_alg *algs, int count);
163 void crypto_unregister_aeads(struct aead_alg *algs, int count);
164 int aead_register_instance(struct crypto_template *tmpl,
165 			   struct aead_instance *inst);
166 
167 #endif	/* _CRYPTO_INTERNAL_AEAD_H */
168 
169