1/*
 2 * if_alg: User-space algorithm interface
 3 *
 4 * Copyright (c) 2010 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_IF_ALG_H
14#define _CRYPTO_IF_ALG_H
15
16#include <linux/compiler.h>
17#include <linux/completion.h>
18#include <linux/if_alg.h>
19#include <linux/scatterlist.h>
20#include <linux/types.h>
21#include <net/sock.h>
22
23#define ALG_MAX_PAGES			16
24
25struct crypto_async_request;
26
27struct alg_sock {
28	/* struct sock must be the first member of struct alg_sock */
29	struct sock sk;
30
31	struct sock *parent;
32
 
 
 
33	const struct af_alg_type *type;
34	void *private;
35};
36
37struct af_alg_completion {
38	struct completion completion;
39	int err;
40};
41
42struct af_alg_control {
43	struct af_alg_iv *iv;
44	int op;
 
45};
46
47struct af_alg_type {
48	void *(*bind)(const char *name, u32 type, u32 mask);
49	void (*release)(void *private);
50	int (*setkey)(void *private, const u8 *key, unsigned int keylen);
51	int (*accept)(void *private, struct sock *sk);
 
 
52
53	struct proto_ops *ops;
 
54	struct module *owner;
55	char name[14];
56};
57
58struct af_alg_sgl {
59	struct scatterlist sg[ALG_MAX_PAGES];
60	struct page *pages[ALG_MAX_PAGES];
 
61};
62
63int af_alg_register_type(const struct af_alg_type *type);
64int af_alg_unregister_type(const struct af_alg_type *type);
65
66int af_alg_release(struct socket *sock);
 
67int af_alg_accept(struct sock *sk, struct socket *newsock);
68
69int af_alg_make_sg(struct af_alg_sgl *sgl, void __user *addr, int len,
70		   int write);
71void af_alg_free_sg(struct af_alg_sgl *sgl);
 
72
73int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
74
75int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
76void af_alg_complete(struct crypto_async_request *req, int err);
77
78static inline struct alg_sock *alg_sk(struct sock *sk)
79{
80	return (struct alg_sock *)sk;
81}
82
83static inline void af_alg_release_parent(struct sock *sk)
84{
85	sock_put(alg_sk(sk)->parent);
86}
87
88static inline void af_alg_init_completion(struct af_alg_completion *completion)
89{
90	init_completion(&completion->completion);
91}
92
93#endif	/* _CRYPTO_IF_ALG_H */

 1/*
 2 * if_alg: User-space algorithm interface
 3 *
 4 * Copyright (c) 2010 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_IF_ALG_H
14#define _CRYPTO_IF_ALG_H
15
16#include <linux/compiler.h>
17#include <linux/completion.h>
18#include <linux/if_alg.h>
19#include <linux/scatterlist.h>
20#include <linux/types.h>
21#include <net/sock.h>
22
23#define ALG_MAX_PAGES			16
24
25struct crypto_async_request;
26
27struct alg_sock {
28	/* struct sock must be the first member of struct alg_sock */
29	struct sock sk;
30
31	struct sock *parent;
32
33	unsigned int refcnt;
34	unsigned int nokey_refcnt;
35
36	const struct af_alg_type *type;
37	void *private;
38};
39
40struct af_alg_completion {
41	struct completion completion;
42	int err;
43};
44
45struct af_alg_control {
46	struct af_alg_iv *iv;
47	int op;
48	unsigned int aead_assoclen;
49};
50
51struct af_alg_type {
52	void *(*bind)(const char *name, u32 type, u32 mask);
53	void (*release)(void *private);
54	int (*setkey)(void *private, const u8 *key, unsigned int keylen);
55	int (*accept)(void *private, struct sock *sk);
56	int (*accept_nokey)(void *private, struct sock *sk);
57	int (*setauthsize)(void *private, unsigned int authsize);
58
59	struct proto_ops *ops;
60	struct proto_ops *ops_nokey;
61	struct module *owner;
62	char name[14];
63};
64
65struct af_alg_sgl {
66	struct scatterlist sg[ALG_MAX_PAGES + 1];
67	struct page *pages[ALG_MAX_PAGES];
68	unsigned int npages;
69};
70
71int af_alg_register_type(const struct af_alg_type *type);
72int af_alg_unregister_type(const struct af_alg_type *type);
73
74int af_alg_release(struct socket *sock);
75void af_alg_release_parent(struct sock *sk);
76int af_alg_accept(struct sock *sk, struct socket *newsock);
77
78int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len);
 
79void af_alg_free_sg(struct af_alg_sgl *sgl);
80void af_alg_link_sg(struct af_alg_sgl *sgl_prev, struct af_alg_sgl *sgl_new);
81
82int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
83
84int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
85void af_alg_complete(struct crypto_async_request *req, int err);
86
87static inline struct alg_sock *alg_sk(struct sock *sk)
88{
89	return (struct alg_sock *)sk;
 
 
 
 
 
90}
91
92static inline void af_alg_init_completion(struct af_alg_completion *completion)
93{
94	init_completion(&completion->completion);
95}
96
97#endif	/* _CRYPTO_IF_ALG_H */