1 /* 2 * AEAD: Authenticated Encryption with Associated Data 3 * 4 * Copyright (c) 2007-2015 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 void (*free)(struct aead_instance *inst); 25 union { 26 struct { 27 char head[offsetof(struct aead_alg, base)]; 28 struct crypto_instance base; 29 } s; 30 struct aead_alg alg; 31 }; 32 }; 33 34 struct crypto_aead_spawn { 35 struct crypto_spawn base; 36 }; 37 38 struct aead_queue { 39 struct crypto_queue base; 40 }; 41 42 static inline void *crypto_aead_ctx(struct crypto_aead *tfm) 43 { 44 return crypto_tfm_ctx(&tfm->base); 45 } 46 47 static inline struct crypto_instance *aead_crypto_instance( 48 struct aead_instance *inst) 49 { 50 return container_of(&inst->alg.base, struct crypto_instance, alg); 51 } 52 53 static inline struct aead_instance *aead_instance(struct crypto_instance *inst) 54 { 55 return container_of(&inst->alg, struct aead_instance, alg.base); 56 } 57 58 static inline struct aead_instance *aead_alg_instance(struct crypto_aead *aead) 59 { 60 return aead_instance(crypto_tfm_alg_instance(&aead->base)); 61 } 62 63 static inline void *aead_instance_ctx(struct aead_instance *inst) 64 { 65 return crypto_instance_ctx(aead_crypto_instance(inst)); 66 } 67 68 static inline void *aead_request_ctx(struct aead_request *req) 69 { 70 return req->__ctx; 71 } 72 73 static inline void aead_request_complete(struct aead_request *req, int err) 74 { 75 req->base.complete(&req->base, err); 76 } 77 78 static inline u32 aead_request_flags(struct aead_request *req) 79 { 80 return req->base.flags; 81 } 82 83 static inline struct aead_request *aead_request_cast( 84 struct crypto_async_request *req) 85 { 86 return container_of(req, struct aead_request, base); 87 } 88 89 static inline void crypto_set_aead_spawn( 90 struct crypto_aead_spawn *spawn, struct crypto_instance *inst) 91 { 92 crypto_set_spawn(&spawn->base, inst); 93 } 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 aead_alg *crypto_spawn_aead_alg( 104 struct crypto_aead_spawn *spawn) 105 { 106 return container_of(spawn->base.alg, struct aead_alg, base); 107 } 108 109 static inline struct crypto_aead *crypto_spawn_aead( 110 struct crypto_aead_spawn *spawn) 111 { 112 return crypto_spawn_tfm2(&spawn->base); 113 } 114 115 static inline void crypto_aead_set_reqsize(struct crypto_aead *aead, 116 unsigned int reqsize) 117 { 118 aead->reqsize = reqsize; 119 } 120 121 static inline unsigned int crypto_aead_alg_maxauthsize(struct aead_alg *alg) 122 { 123 return alg->maxauthsize; 124 } 125 126 static inline unsigned int crypto_aead_maxauthsize(struct crypto_aead *aead) 127 { 128 return crypto_aead_alg_maxauthsize(crypto_aead_alg(aead)); 129 } 130 131 static inline void aead_init_queue(struct aead_queue *queue, 132 unsigned int max_qlen) 133 { 134 crypto_init_queue(&queue->base, max_qlen); 135 } 136 137 static inline int aead_enqueue_request(struct aead_queue *queue, 138 struct aead_request *request) 139 { 140 return crypto_enqueue_request(&queue->base, &request->base); 141 } 142 143 static inline struct aead_request *aead_dequeue_request( 144 struct aead_queue *queue) 145 { 146 struct crypto_async_request *req; 147 148 req = crypto_dequeue_request(&queue->base); 149 150 return req ? container_of(req, struct aead_request, base) : NULL; 151 } 152 153 static inline struct aead_request *aead_get_backlog(struct aead_queue *queue) 154 { 155 struct crypto_async_request *req; 156 157 req = crypto_get_backlog(&queue->base); 158 159 return req ? container_of(req, struct aead_request, base) : NULL; 160 } 161 162 static inline unsigned int crypto_aead_alg_chunksize(struct aead_alg *alg) 163 { 164 return alg->chunksize; 165 } 166 167 /** 168 * crypto_aead_chunksize() - obtain chunk size 169 * @tfm: cipher handle 170 * 171 * The block size is set to one for ciphers such as CCM. However, 172 * you still need to provide incremental updates in multiples of 173 * the underlying block size as the IV does not have sub-block 174 * granularity. This is known in this API as the chunk size. 175 * 176 * Return: chunk size in bytes 177 */ 178 static inline unsigned int crypto_aead_chunksize(struct crypto_aead *tfm) 179 { 180 return crypto_aead_alg_chunksize(crypto_aead_alg(tfm)); 181 } 182 183 int crypto_register_aead(struct aead_alg *alg); 184 void crypto_unregister_aead(struct aead_alg *alg); 185 int crypto_register_aeads(struct aead_alg *algs, int count); 186 void crypto_unregister_aeads(struct aead_alg *algs, int count); 187 int aead_register_instance(struct crypto_template *tmpl, 188 struct aead_instance *inst); 189 190 #endif /* _CRYPTO_INTERNAL_AEAD_H */ 191 192