tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Hash: Hash algorithms under the crypto API
3 *
4 * Copyright (c) 2008 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_HASH_H
14#define _CRYPTO_HASH_H
15
16#include <linux/crypto.h>
17
18struct crypto_ahash {
19 struct crypto_tfm base;
20};
21
22static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
23{
24 return (struct crypto_ahash *)tfm;
25}
26
27static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name,
28 u32 type, u32 mask)
29{
30 type &= ~CRYPTO_ALG_TYPE_MASK;
31 mask &= ~CRYPTO_ALG_TYPE_MASK;
32 type |= CRYPTO_ALG_TYPE_AHASH;
33 mask |= CRYPTO_ALG_TYPE_AHASH_MASK;
34
35 return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask));
36}
37
38static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
39{
40 return &tfm->base;
41}
42
43static inline void crypto_free_ahash(struct crypto_ahash *tfm)
44{
45 crypto_free_tfm(crypto_ahash_tfm(tfm));
46}
47
48static inline unsigned int crypto_ahash_alignmask(
49 struct crypto_ahash *tfm)
50{
51 return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
52}
53
54static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm)
55{
56 return &crypto_ahash_tfm(tfm)->crt_ahash;
57}
58
59static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
60{
61 return crypto_ahash_crt(tfm)->digestsize;
62}
63
64static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
65{
66 return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
67}
68
69static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
70{
71 crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
72}
73
74static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
75{
76 crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
77}
78
79static inline struct crypto_ahash *crypto_ahash_reqtfm(
80 struct ahash_request *req)
81{
82 return __crypto_ahash_cast(req->base.tfm);
83}
84
85static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
86{
87 return crypto_ahash_crt(tfm)->reqsize;
88}
89
90static inline int crypto_ahash_setkey(struct crypto_ahash *tfm,
91 const u8 *key, unsigned int keylen)
92{
93 struct ahash_tfm *crt = crypto_ahash_crt(tfm);
94
95 return crt->setkey(tfm, key, keylen);
96}
97
98static inline int crypto_ahash_digest(struct ahash_request *req)
99{
100 struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req));
101 return crt->digest(req);
102}
103
104static inline void ahash_request_set_tfm(struct ahash_request *req,
105 struct crypto_ahash *tfm)
106{
107 req->base.tfm = crypto_ahash_tfm(tfm);
108}
109
110static inline struct ahash_request *ahash_request_alloc(
111 struct crypto_ahash *tfm, gfp_t gfp)
112{
113 struct ahash_request *req;
114
115 req = kmalloc(sizeof(struct ahash_request) +
116 crypto_ahash_reqsize(tfm), gfp);
117
118 if (likely(req))
119 ahash_request_set_tfm(req, tfm);
120
121 return req;
122}
123
124static inline void ahash_request_free(struct ahash_request *req)
125{
126 kfree(req);
127}
128
129static inline struct ahash_request *ahash_request_cast(
130 struct crypto_async_request *req)
131{
132 return container_of(req, struct ahash_request, base);
133}
134
135static inline void ahash_request_set_callback(struct ahash_request *req,
136 u32 flags,
137 crypto_completion_t complete,
138 void *data)
139{
140 req->base.complete = complete;
141 req->base.data = data;
142 req->base.flags = flags;
143}
144
145static inline void ahash_request_set_crypt(struct ahash_request *req,
146 struct scatterlist *src, u8 *result,
147 unsigned int nbytes)
148{
149 req->src = src;
150 req->nbytes = nbytes;
151 req->result = result;
152}
153
154#endif /* _CRYPTO_HASH_H */