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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_AEAD_H |
14 | #define _CRYPTO_AEAD_H |
15 | |
16 | #include <linux/crypto.h> |
17 | #include <linux/kernel.h> |
18 | #include <linux/slab.h> |
19 | |
20 | /** |
21 | * struct aead_givcrypt_request - AEAD request with IV generation |
22 | * @seq: Sequence number for IV generation |
23 | * @giv: Space for generated IV |
24 | * @areq: The AEAD request itself |
25 | */ |
26 | struct aead_givcrypt_request { |
27 | u64 seq; |
28 | u8 *giv; |
29 | |
30 | struct aead_request areq; |
31 | }; |
32 | |
33 | static inline struct crypto_aead *aead_givcrypt_reqtfm( |
34 | struct aead_givcrypt_request *req) |
35 | { |
36 | return crypto_aead_reqtfm(&req->areq); |
37 | } |
38 | |
39 | static inline int crypto_aead_givencrypt(struct aead_givcrypt_request *req) |
40 | { |
41 | struct aead_tfm *crt = crypto_aead_crt(aead_givcrypt_reqtfm(req)); |
42 | return crt->givencrypt(req); |
43 | }; |
44 | |
45 | static inline int crypto_aead_givdecrypt(struct aead_givcrypt_request *req) |
46 | { |
47 | struct aead_tfm *crt = crypto_aead_crt(aead_givcrypt_reqtfm(req)); |
48 | return crt->givdecrypt(req); |
49 | }; |
50 | |
51 | static inline void aead_givcrypt_set_tfm(struct aead_givcrypt_request *req, |
52 | struct crypto_aead *tfm) |
53 | { |
54 | req->areq.base.tfm = crypto_aead_tfm(tfm); |
55 | } |
56 | |
57 | static inline struct aead_givcrypt_request *aead_givcrypt_alloc( |
58 | struct crypto_aead *tfm, gfp_t gfp) |
59 | { |
60 | struct aead_givcrypt_request *req; |
61 | |
62 | req = kmalloc(sizeof(struct aead_givcrypt_request) + |
63 | crypto_aead_reqsize(tfm), gfp); |
64 | |
65 | if (likely(req)) |
66 | aead_givcrypt_set_tfm(req, tfm); |
67 | |
68 | return req; |
69 | } |
70 | |
71 | static inline void aead_givcrypt_free(struct aead_givcrypt_request *req) |
72 | { |
73 | kfree(req); |
74 | } |
75 | |
76 | static inline void aead_givcrypt_set_callback( |
77 | struct aead_givcrypt_request *req, u32 flags, |
78 | crypto_completion_t complete, void *data) |
79 | { |
80 | aead_request_set_callback(&req->areq, flags, complete, data); |
81 | } |
82 | |
83 | static inline void aead_givcrypt_set_crypt(struct aead_givcrypt_request *req, |
84 | struct scatterlist *src, |
85 | struct scatterlist *dst, |
86 | unsigned int nbytes, void *iv) |
87 | { |
88 | aead_request_set_crypt(&req->areq, src, dst, nbytes, iv); |
89 | } |
90 | |
91 | static inline void aead_givcrypt_set_assoc(struct aead_givcrypt_request *req, |
92 | struct scatterlist *assoc, |
93 | unsigned int assoclen) |
94 | { |
95 | aead_request_set_assoc(&req->areq, assoc, assoclen); |
96 | } |
97 | |
98 | static inline void aead_givcrypt_set_giv(struct aead_givcrypt_request *req, |
99 | u8 *giv, u64 seq) |
100 | { |
101 | req->giv = giv; |
102 | req->seq = seq; |
103 | } |
104 | |
105 | #endif /* _CRYPTO_AEAD_H */ |
106 |
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