Merge remote branch 'origin' into secretlab/next-devicetree
[platform/adaptation/renesas_rcar/renesas_kernel.git] / include / crypto / rng.h
1 /*
2  * RNG: Random Number Generator  algorithms under the crypto API
3  *
4  * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
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_RNG_H
14 #define _CRYPTO_RNG_H
15
16 #include <linux/crypto.h>
17
18 extern struct crypto_rng *crypto_default_rng;
19
20 int crypto_get_default_rng(void);
21 void crypto_put_default_rng(void);
22
23 static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm)
24 {
25         return (struct crypto_rng *)tfm;
26 }
27
28 static inline struct crypto_rng *crypto_alloc_rng(const char *alg_name,
29                                                   u32 type, u32 mask)
30 {
31         type &= ~CRYPTO_ALG_TYPE_MASK;
32         type |= CRYPTO_ALG_TYPE_RNG;
33         mask |= CRYPTO_ALG_TYPE_MASK;
34
35         return __crypto_rng_cast(crypto_alloc_base(alg_name, type, mask));
36 }
37
38 static inline struct crypto_tfm *crypto_rng_tfm(struct crypto_rng *tfm)
39 {
40         return &tfm->base;
41 }
42
43 static inline struct rng_alg *crypto_rng_alg(struct crypto_rng *tfm)
44 {
45         return &crypto_rng_tfm(tfm)->__crt_alg->cra_rng;
46 }
47
48 static inline struct rng_tfm *crypto_rng_crt(struct crypto_rng *tfm)
49 {
50         return &crypto_rng_tfm(tfm)->crt_rng;
51 }
52
53 static inline void crypto_free_rng(struct crypto_rng *tfm)
54 {
55         crypto_free_tfm(crypto_rng_tfm(tfm));
56 }
57
58 static inline int crypto_rng_get_bytes(struct crypto_rng *tfm,
59                                        u8 *rdata, unsigned int dlen)
60 {
61         return crypto_rng_crt(tfm)->rng_gen_random(tfm, rdata, dlen);
62 }
63
64 static inline int crypto_rng_reset(struct crypto_rng *tfm,
65                                    u8 *seed, unsigned int slen)
66 {
67         return crypto_rng_crt(tfm)->rng_reset(tfm, seed, slen);
68 }
69
70 static inline int crypto_rng_seedsize(struct crypto_rng *tfm)
71 {
72         return crypto_rng_alg(tfm)->seedsize;
73 }
74
75 #endif