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 25 struct crypto_async_request; 26 27 struct 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 37 struct af_alg_completion { 38 struct completion completion; 39 int err; 40 }; 41 42 struct af_alg_control { 43 struct af_alg_iv *iv; 44 int op; 45 unsigned int aead_assoclen; 46 }; 47 48 struct af_alg_type { 49 void *(*bind)(const char *name, u32 type, u32 mask); 50 void (*release)(void *private); 51 int (*setkey)(void *private, const u8 *key, unsigned int keylen); 52 int (*accept)(void *private, struct sock *sk); 53 int (*setauthsize)(void *private, unsigned int authsize); 54 55 struct proto_ops *ops; 56 struct module *owner; 57 char name[14]; 58 }; 59 60 struct af_alg_sgl { 61 struct scatterlist sg[ALG_MAX_PAGES + 1]; 62 struct page *pages[ALG_MAX_PAGES]; 63 unsigned int npages; 64 }; 65 66 int af_alg_register_type(const struct af_alg_type *type); 67 int af_alg_unregister_type(const struct af_alg_type *type); 68 69 int af_alg_release(struct socket *sock); 70 int af_alg_accept(struct sock *sk, struct socket *newsock); 71 72 int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len); 73 void af_alg_free_sg(struct af_alg_sgl *sgl); 74 void af_alg_link_sg(struct af_alg_sgl *sgl_prev, struct af_alg_sgl *sgl_new); 75 76 int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con); 77 78 int af_alg_wait_for_completion(int err, struct af_alg_completion *completion); 79 void af_alg_complete(struct crypto_async_request *req, int err); 80 81 static inline struct alg_sock *alg_sk(struct sock *sk) 82 { 83 return (struct alg_sock *)sk; 84 } 85 86 static inline void af_alg_release_parent(struct sock *sk) 87 { 88 sock_put(alg_sk(sk)->parent); 89 } 90 91 static inline void af_alg_init_completion(struct af_alg_completion *completion) 92 { 93 init_completion(&completion->completion); 94 } 95 96 #endif /* _CRYPTO_IF_ALG_H */ 97