| 1 |
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| 2 | |
| 3 | * AEAD: Authenticated Encryption with Associated Data
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| 4 | *
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| 5 | * Copyright (c) 2007-2015 Herbert Xu <[email protected]>
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| 6 |
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| 7 |
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| 8 | #ifndef _CRYPTO_INTERNAL_AEAD_H
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| 9 | #define _CRYPTO_INTERNAL_AEAD_H
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| 10 |
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| 11 | #include <crypto/aead.h>
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| 12 | #include <crypto/algapi.h>
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| 13 | #include <linux/stddef.h>
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| 14 | #include <linux/types.h>
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| 15 |
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| 16 | struct rtattr;
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| 17 |
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| 18 | struct aead_instance {
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| 19 | void (*free)(struct aead_instance *inst);
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| 20 | union {
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| 21 | struct {
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| 22 | char head[offsetof(struct aead_alg, base)];
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| 23 | struct crypto_instance base;
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| 24 | } s;
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| 25 | struct aead_alg alg;
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| 26 | };
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| 27 | };
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| 28 |
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| 29 | struct crypto_aead_spawn {
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| 30 | struct crypto_spawn base;
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| 31 | };
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| 32 |
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| 33 | struct aead_queue {
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| 34 | struct crypto_queue base;
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| 35 | };
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| 36 |
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| 37 | static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
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| 38 | {
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| 39 | return crypto_tfm_ctx(&tfm->base);
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| 40 | }
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| 41 |
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| 42 | static inline void *crypto_aead_ctx_dma(struct crypto_aead *tfm)
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| 43 | {
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| 44 | return crypto_tfm_ctx_dma(&tfm->base);
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| 45 | }
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| 46 |
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| 47 | static inline struct crypto_instance *aead_crypto_instance(
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| 48 | struct aead_instance *inst)
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| 49 | {
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| 50 | return container_of(&inst->alg.base, struct crypto_instance, alg);
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| 51 | }
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| 52 |
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| 53 | static inline struct aead_instance *aead_instance(struct crypto_instance *inst)
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| 54 | {
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| 55 | return container_of(&inst->alg, struct aead_instance, alg.base);
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| 56 | }
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| 57 |
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| 58 | static inline struct aead_instance *aead_alg_instance(struct crypto_aead *aead)
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| 59 | {
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| 60 | return aead_instance(crypto_tfm_alg_instance(&aead->base));
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| 61 | }
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| 62 |
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| 63 | static inline void *aead_instance_ctx(struct aead_instance *inst)
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| 64 | {
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| 65 | return crypto_instance_ctx(aead_crypto_instance(inst));
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| 66 | }
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| 67 |
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| 68 | static inline void *aead_request_ctx(struct aead_request *req)
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| 69 | {
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| 70 | return req->__ctx;
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| 71 | }
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| 72 |
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| 73 | static inline void *aead_request_ctx_dma(struct aead_request *req)
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| 74 | {
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| 75 | unsigned int align = crypto_dma_align();
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| 76 |
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| 77 | if (align <= crypto_tfm_ctx_alignment())
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| 78 | align = 1;
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| 79 |
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| 80 | return PTR_ALIGN(aead_request_ctx(req), align);
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| 81 | }
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| 82 |
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| 83 | static inline void aead_request_complete(struct aead_request *req, int err)
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| 84 | {
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| 85 | crypto_request_complete(&req->base, err);
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| 86 | }
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| 87 |
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| 88 | static inline u32 aead_request_flags(struct aead_request *req)
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| 89 | {
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| 90 | return req->base.flags;
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| 91 | }
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| 92 |
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| 93 | static inline struct aead_request *aead_request_cast(
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| 94 | struct crypto_async_request *req)
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| 95 | {
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| 96 | return container_of(req, struct aead_request, base);
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| 97 | }
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| 98 |
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| 99 | int crypto_grab_aead(struct crypto_aead_spawn *spawn,
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| 100 | struct crypto_instance *inst,
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| 101 | const char *name, u32 type, u32 mask);
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| 102 |
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| 103 | static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
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| 104 | {
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| 105 | crypto_drop_spawn(&spawn->base);
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| 106 | }
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| 107 |
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| 108 | static inline struct aead_alg *crypto_spawn_aead_alg(
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| 109 | struct crypto_aead_spawn *spawn)
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| 110 | {
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| 111 | return container_of(spawn->base.alg, struct aead_alg, base);
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| 112 | }
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| 113 |
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| 114 | static inline struct crypto_aead *crypto_spawn_aead(
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| 115 | struct crypto_aead_spawn *spawn)
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| 116 | {
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| 117 | return crypto_spawn_tfm2(&spawn->base);
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| 118 | }
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| 119 |
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| 120 | static inline void crypto_aead_set_reqsize(struct crypto_aead *aead,
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| 121 | unsigned int reqsize)
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| 122 | {
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| 123 | aead->reqsize = reqsize;
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| 124 | }
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| 125 |
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| 126 | static inline void crypto_aead_set_reqsize_dma(struct crypto_aead *aead,
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| 127 | unsigned int reqsize)
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| 128 | {
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| 129 | reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
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| 130 | aead->reqsize = reqsize;
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| 131 | }
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| 132 |
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| 133 | static inline void aead_init_queue(struct aead_queue *queue,
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| 134 | unsigned int max_qlen)
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| 135 | {
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| 136 | crypto_init_queue(&queue->base, max_qlen);
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| 137 | }
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| 138 |
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| 139 | static inline unsigned int crypto_aead_alg_chunksize(struct aead_alg *alg)
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| 140 | {
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| 141 | return alg->chunksize;
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| 142 | }
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| 143 |
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| 144 | |
| 145 | * crypto_aead_chunksize() - obtain chunk size
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| 146 | * @tfm: cipher handle
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| 147 | *
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| 148 | * The block size is set to one for ciphers such as CCM. However,
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| 149 | * you still need to provide incremental updates in multiples of
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| 150 | * the underlying block size as the IV does not have sub-block
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| 151 | * granularity. This is known in this API as the chunk size.
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| 152 | *
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| 153 | * Return: chunk size in bytes
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| 154 |
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| 155 | static inline unsigned int crypto_aead_chunksize(struct crypto_aead *tfm)
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| 156 | {
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| 157 | return crypto_aead_alg_chunksize(crypto_aead_alg(tfm));
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| 158 | }
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| 159 |
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| 160 | int crypto_register_aead(struct aead_alg *alg);
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| 161 | void crypto_unregister_aead(struct aead_alg *alg);
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| 162 | int crypto_register_aeads(struct aead_alg *algs, int count);
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| 163 | void crypto_unregister_aeads(struct aead_alg *algs, int count);
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| 164 | int aead_register_instance(struct crypto_template *tmpl,
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| 165 | struct aead_instance *inst);
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| 166 |
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| 167 | #endif
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| 168 |
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