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61da88e2 HX |
1 | /* |
2 | * Symmetric key ciphers. | |
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_SKCIPHER_H | |
14 | #define _CRYPTO_SKCIPHER_H | |
15 | ||
16 | #include <linux/crypto.h> | |
03bf712f HX |
17 | #include <linux/kernel.h> |
18 | #include <linux/slab.h> | |
61da88e2 HX |
19 | |
20 | /** | |
21 | * struct skcipher_givcrypt_request - Crypto request with IV generation | |
22 | * @seq: Sequence number for IV generation | |
23 | * @giv: Space for generated IV | |
24 | * @creq: The crypto request itself | |
25 | */ | |
26 | struct skcipher_givcrypt_request { | |
27 | u64 seq; | |
28 | u8 *giv; | |
29 | ||
30 | struct ablkcipher_request creq; | |
31 | }; | |
32 | ||
33 | static inline struct crypto_ablkcipher *skcipher_givcrypt_reqtfm( | |
34 | struct skcipher_givcrypt_request *req) | |
35 | { | |
36 | return crypto_ablkcipher_reqtfm(&req->creq); | |
37 | } | |
38 | ||
03bf712f HX |
39 | static inline int crypto_skcipher_givencrypt( |
40 | struct skcipher_givcrypt_request *req) | |
41 | { | |
42 | struct ablkcipher_tfm *crt = | |
43 | crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req)); | |
44 | return crt->givencrypt(req); | |
45 | }; | |
46 | ||
47 | static inline int crypto_skcipher_givdecrypt( | |
48 | struct skcipher_givcrypt_request *req) | |
49 | { | |
50 | struct ablkcipher_tfm *crt = | |
51 | crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req)); | |
52 | return crt->givdecrypt(req); | |
53 | }; | |
54 | ||
55 | static inline void skcipher_givcrypt_set_tfm( | |
56 | struct skcipher_givcrypt_request *req, struct crypto_ablkcipher *tfm) | |
57 | { | |
58 | req->creq.base.tfm = crypto_ablkcipher_tfm(tfm); | |
59 | } | |
60 | ||
61 | static inline struct skcipher_givcrypt_request *skcipher_givcrypt_cast( | |
62 | struct crypto_async_request *req) | |
63 | { | |
64 | return container_of(ablkcipher_request_cast(req), | |
65 | struct skcipher_givcrypt_request, creq); | |
66 | } | |
67 | ||
68 | static inline struct skcipher_givcrypt_request *skcipher_givcrypt_alloc( | |
69 | struct crypto_ablkcipher *tfm, gfp_t gfp) | |
70 | { | |
71 | struct skcipher_givcrypt_request *req; | |
72 | ||
73 | req = kmalloc(sizeof(struct skcipher_givcrypt_request) + | |
74 | crypto_ablkcipher_reqsize(tfm), gfp); | |
75 | ||
76 | if (likely(req)) | |
77 | skcipher_givcrypt_set_tfm(req, tfm); | |
78 | ||
79 | return req; | |
80 | } | |
81 | ||
82 | static inline void skcipher_givcrypt_free(struct skcipher_givcrypt_request *req) | |
83 | { | |
84 | kfree(req); | |
85 | } | |
86 | ||
87 | static inline void skcipher_givcrypt_set_callback( | |
88 | struct skcipher_givcrypt_request *req, u32 flags, | |
89 | crypto_completion_t complete, void *data) | |
90 | { | |
91 | ablkcipher_request_set_callback(&req->creq, flags, complete, data); | |
92 | } | |
93 | ||
94 | static inline void skcipher_givcrypt_set_crypt( | |
95 | struct skcipher_givcrypt_request *req, | |
96 | struct scatterlist *src, struct scatterlist *dst, | |
97 | unsigned int nbytes, void *iv) | |
98 | { | |
99 | ablkcipher_request_set_crypt(&req->creq, src, dst, nbytes, iv); | |
100 | } | |
101 | ||
102 | static inline void skcipher_givcrypt_set_giv( | |
103 | struct skcipher_givcrypt_request *req, u8 *giv, u64 seq) | |
104 | { | |
105 | req->giv = giv; | |
106 | req->seq = seq; | |
107 | } | |
108 | ||
61da88e2 HX |
109 | #endif /* _CRYPTO_SKCIPHER_H */ |
110 |