Root/include/crypto/aead.h

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 */
26struct aead_givcrypt_request {
27    u64 seq;
28    u8 *giv;
29
30    struct aead_request areq;
31};
32
33static inline struct crypto_aead *aead_givcrypt_reqtfm(
34    struct aead_givcrypt_request *req)
35{
36    return crypto_aead_reqtfm(&req->areq);
37}
38
39static 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
45static 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
51static 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
57static 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
71static inline void aead_givcrypt_free(struct aead_givcrypt_request *req)
72{
73    kfree(req);
74}
75
76static 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
83static 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
91static 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
98static 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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