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381 lines
10 KiB
381 lines
10 KiB
/* |
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* Cryptographic API for algorithms (i.e., low-level API). |
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* |
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* Copyright (c) 2006 Herbert Xu <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the Free |
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* Software Foundation; either version 2 of the License, or (at your option) |
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* any later version. |
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* |
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*/ |
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#ifndef _CRYPTO_ALGAPI_H |
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#define _CRYPTO_ALGAPI_H |
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#include <linux/crypto.h> |
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#include <linux/list.h> |
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#include <linux/kernel.h> |
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#include <linux/skbuff.h> |
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struct crypto_aead; |
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struct crypto_instance; |
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struct module; |
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struct rtattr; |
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struct seq_file; |
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struct crypto_type { |
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unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
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unsigned int (*extsize)(struct crypto_alg *alg); |
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int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); |
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int (*init_tfm)(struct crypto_tfm *tfm); |
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void (*show)(struct seq_file *m, struct crypto_alg *alg); |
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int (*report)(struct sk_buff *skb, struct crypto_alg *alg); |
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struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask); |
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void (*free)(struct crypto_instance *inst); |
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unsigned int type; |
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unsigned int maskclear; |
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unsigned int maskset; |
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unsigned int tfmsize; |
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} __do_const; |
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struct crypto_instance { |
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struct crypto_alg alg; |
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struct crypto_template *tmpl; |
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struct hlist_node list; |
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void *__ctx[] CRYPTO_MINALIGN_ATTR; |
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}; |
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struct crypto_template { |
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struct list_head list; |
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struct hlist_head instances; |
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struct module *module; |
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struct crypto_instance *(*alloc)(struct rtattr **tb); |
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void (*free)(struct crypto_instance *inst); |
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int (*create)(struct crypto_template *tmpl, struct rtattr **tb); |
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char name[CRYPTO_MAX_ALG_NAME]; |
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}; |
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struct crypto_spawn { |
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struct list_head list; |
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struct crypto_alg *alg; |
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struct crypto_instance *inst; |
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const struct crypto_type *frontend; |
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u32 mask; |
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}; |
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struct crypto_queue { |
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struct list_head list; |
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struct list_head *backlog; |
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unsigned int qlen; |
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unsigned int max_qlen; |
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}; |
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struct scatter_walk { |
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struct scatterlist *sg; |
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unsigned int offset; |
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}; |
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struct blkcipher_walk { |
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union { |
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struct { |
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struct page *page; |
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unsigned long offset; |
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} phys; |
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struct { |
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u8 *page; |
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u8 *addr; |
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} virt; |
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} src, dst; |
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struct scatter_walk in; |
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unsigned int nbytes; |
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struct scatter_walk out; |
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unsigned int total; |
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void *page; |
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u8 *buffer; |
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u8 *iv; |
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unsigned int ivsize; |
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int flags; |
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unsigned int walk_blocksize; |
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unsigned int cipher_blocksize; |
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unsigned int alignmask; |
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}; |
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struct ablkcipher_walk { |
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struct { |
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struct page *page; |
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unsigned int offset; |
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} src, dst; |
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struct scatter_walk in; |
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unsigned int nbytes; |
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struct scatter_walk out; |
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unsigned int total; |
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struct list_head buffers; |
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u8 *iv_buffer; |
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u8 *iv; |
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int flags; |
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unsigned int blocksize; |
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}; |
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extern const struct crypto_type crypto_ablkcipher_type; |
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extern const struct crypto_type crypto_blkcipher_type; |
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void crypto_mod_put(struct crypto_alg *alg); |
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int crypto_register_template(struct crypto_template *tmpl); |
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void crypto_unregister_template(struct crypto_template *tmpl); |
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struct crypto_template *crypto_lookup_template(const char *name); |
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int crypto_register_instance(struct crypto_template *tmpl, |
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struct crypto_instance *inst); |
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int crypto_unregister_instance(struct crypto_instance *inst); |
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int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
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struct crypto_instance *inst, u32 mask); |
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int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, |
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struct crypto_instance *inst, |
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const struct crypto_type *frontend); |
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int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name, |
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u32 type, u32 mask); |
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void crypto_drop_spawn(struct crypto_spawn *spawn); |
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struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
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u32 mask); |
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void *crypto_spawn_tfm2(struct crypto_spawn *spawn); |
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static inline void crypto_set_spawn(struct crypto_spawn *spawn, |
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struct crypto_instance *inst) |
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{ |
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spawn->inst = inst; |
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} |
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struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
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int crypto_check_attr_type(struct rtattr **tb, u32 type); |
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const char *crypto_attr_alg_name(struct rtattr *rta); |
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struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, |
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const struct crypto_type *frontend, |
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u32 type, u32 mask); |
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static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta, |
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u32 type, u32 mask) |
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{ |
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return crypto_attr_alg2(rta, NULL, type, mask); |
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} |
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int crypto_attr_u32(struct rtattr *rta, u32 *num); |
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int crypto_inst_setname(struct crypto_instance *inst, const char *name, |
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struct crypto_alg *alg); |
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void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, |
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unsigned int head); |
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struct crypto_instance *crypto_alloc_instance(const char *name, |
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struct crypto_alg *alg); |
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void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); |
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int crypto_enqueue_request(struct crypto_queue *queue, |
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struct crypto_async_request *request); |
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struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); |
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int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); |
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static inline unsigned int crypto_queue_len(struct crypto_queue *queue) |
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{ |
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return queue->qlen; |
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} |
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/* These functions require the input/output to be aligned as u32. */ |
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void crypto_inc(u8 *a, unsigned int size); |
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void crypto_xor(u8 *dst, const u8 *src, unsigned int size); |
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int blkcipher_walk_done(struct blkcipher_desc *desc, |
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struct blkcipher_walk *walk, int err); |
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int blkcipher_walk_virt(struct blkcipher_desc *desc, |
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struct blkcipher_walk *walk); |
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int blkcipher_walk_phys(struct blkcipher_desc *desc, |
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struct blkcipher_walk *walk); |
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int blkcipher_walk_virt_block(struct blkcipher_desc *desc, |
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struct blkcipher_walk *walk, |
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unsigned int blocksize); |
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int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc, |
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struct blkcipher_walk *walk, |
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struct crypto_aead *tfm, |
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unsigned int blocksize); |
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int ablkcipher_walk_done(struct ablkcipher_request *req, |
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struct ablkcipher_walk *walk, int err); |
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int ablkcipher_walk_phys(struct ablkcipher_request *req, |
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struct ablkcipher_walk *walk); |
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void __ablkcipher_walk_complete(struct ablkcipher_walk *walk); |
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static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) |
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{ |
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return PTR_ALIGN(crypto_tfm_ctx(tfm), |
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crypto_tfm_alg_alignmask(tfm) + 1); |
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} |
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static inline struct crypto_instance *crypto_tfm_alg_instance( |
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struct crypto_tfm *tfm) |
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{ |
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return container_of(tfm->__crt_alg, struct crypto_instance, alg); |
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} |
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static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
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{ |
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return inst->__ctx; |
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} |
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static inline struct ablkcipher_alg *crypto_ablkcipher_alg( |
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struct crypto_ablkcipher *tfm) |
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{ |
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return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher; |
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} |
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static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm) |
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{ |
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return crypto_tfm_ctx(&tfm->base); |
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} |
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static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm) |
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{ |
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return crypto_tfm_ctx_aligned(&tfm->base); |
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} |
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static inline struct crypto_blkcipher *crypto_spawn_blkcipher( |
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struct crypto_spawn *spawn) |
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{ |
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u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; |
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u32 mask = CRYPTO_ALG_TYPE_MASK; |
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return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask)); |
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} |
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static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) |
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{ |
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return crypto_tfm_ctx(&tfm->base); |
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} |
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static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) |
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{ |
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return crypto_tfm_ctx_aligned(&tfm->base); |
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} |
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static inline struct crypto_cipher *crypto_spawn_cipher( |
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struct crypto_spawn *spawn) |
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{ |
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u32 type = CRYPTO_ALG_TYPE_CIPHER; |
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u32 mask = CRYPTO_ALG_TYPE_MASK; |
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return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask)); |
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} |
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static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) |
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{ |
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return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; |
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} |
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static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
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struct scatterlist *dst, |
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struct scatterlist *src, |
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unsigned int nbytes) |
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{ |
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walk->in.sg = src; |
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walk->out.sg = dst; |
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walk->total = nbytes; |
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} |
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static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk, |
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struct scatterlist *dst, |
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struct scatterlist *src, |
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unsigned int nbytes) |
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{ |
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walk->in.sg = src; |
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walk->out.sg = dst; |
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walk->total = nbytes; |
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INIT_LIST_HEAD(&walk->buffers); |
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} |
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static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk) |
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{ |
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if (unlikely(!list_empty(&walk->buffers))) |
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__ablkcipher_walk_complete(walk); |
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} |
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static inline struct crypto_async_request *crypto_get_backlog( |
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struct crypto_queue *queue) |
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{ |
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return queue->backlog == &queue->list ? NULL : |
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container_of(queue->backlog, struct crypto_async_request, list); |
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} |
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static inline int ablkcipher_enqueue_request(struct crypto_queue *queue, |
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struct ablkcipher_request *request) |
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{ |
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return crypto_enqueue_request(queue, &request->base); |
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} |
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static inline struct ablkcipher_request *ablkcipher_dequeue_request( |
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struct crypto_queue *queue) |
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{ |
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return ablkcipher_request_cast(crypto_dequeue_request(queue)); |
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} |
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static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req) |
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{ |
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return req->__ctx; |
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} |
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static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue, |
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struct crypto_ablkcipher *tfm) |
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{ |
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return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm)); |
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} |
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static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, |
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u32 type, u32 mask) |
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{ |
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return crypto_attr_alg(tb[1], type, mask); |
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} |
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/* |
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* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms. |
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* Otherwise returns zero. |
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*/ |
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static inline int crypto_requires_sync(u32 type, u32 mask) |
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{ |
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return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC; |
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} |
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noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size); |
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/** |
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* crypto_memneq - Compare two areas of memory without leaking |
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* timing information. |
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* |
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* @a: One area of memory |
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* @b: Another area of memory |
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* @size: The size of the area. |
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* |
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* Returns 0 when data is equal, 1 otherwise. |
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*/ |
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static inline int crypto_memneq(const void *a, const void *b, size_t size) |
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{ |
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return __crypto_memneq(a, b, size) != 0UL ? 1 : 0; |
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} |
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static inline void crypto_yield(u32 flags) |
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{ |
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#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY) |
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if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) |
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cond_resched(); |
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#endif |
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} |
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#endif /* _CRYPTO_ALGAPI_H */
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