ce3fd840f5
We leak the crypto instance when we unregister an instance with crypto_del_alg(). Therefore we introduce crypto_unregister_instance() to unlink the crypto instance from the template's instances list and to free the recources of the instance properly. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
390 lines
10 KiB
C
390 lines
10 KiB
C
/*
|
|
* Cryptographic API for algorithms (i.e., low-level API).
|
|
*
|
|
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
*/
|
|
#ifndef _CRYPTO_ALGAPI_H
|
|
#define _CRYPTO_ALGAPI_H
|
|
|
|
#include <linux/crypto.h>
|
|
#include <linux/list.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
struct module;
|
|
struct rtattr;
|
|
struct seq_file;
|
|
|
|
struct crypto_type {
|
|
unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
|
|
unsigned int (*extsize)(struct crypto_alg *alg);
|
|
int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
|
|
int (*init_tfm)(struct crypto_tfm *tfm);
|
|
void (*show)(struct seq_file *m, struct crypto_alg *alg);
|
|
int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
|
|
struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
|
|
|
|
unsigned int type;
|
|
unsigned int maskclear;
|
|
unsigned int maskset;
|
|
unsigned int tfmsize;
|
|
};
|
|
|
|
struct crypto_instance {
|
|
struct crypto_alg alg;
|
|
|
|
struct crypto_template *tmpl;
|
|
struct hlist_node list;
|
|
|
|
void *__ctx[] CRYPTO_MINALIGN_ATTR;
|
|
};
|
|
|
|
struct crypto_template {
|
|
struct list_head list;
|
|
struct hlist_head instances;
|
|
struct module *module;
|
|
|
|
struct crypto_instance *(*alloc)(struct rtattr **tb);
|
|
void (*free)(struct crypto_instance *inst);
|
|
int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
|
|
|
|
char name[CRYPTO_MAX_ALG_NAME];
|
|
};
|
|
|
|
struct crypto_spawn {
|
|
struct list_head list;
|
|
struct crypto_alg *alg;
|
|
struct crypto_instance *inst;
|
|
const struct crypto_type *frontend;
|
|
u32 mask;
|
|
};
|
|
|
|
struct crypto_queue {
|
|
struct list_head list;
|
|
struct list_head *backlog;
|
|
|
|
unsigned int qlen;
|
|
unsigned int max_qlen;
|
|
};
|
|
|
|
struct scatter_walk {
|
|
struct scatterlist *sg;
|
|
unsigned int offset;
|
|
};
|
|
|
|
struct blkcipher_walk {
|
|
union {
|
|
struct {
|
|
struct page *page;
|
|
unsigned long offset;
|
|
} phys;
|
|
|
|
struct {
|
|
u8 *page;
|
|
u8 *addr;
|
|
} virt;
|
|
} src, dst;
|
|
|
|
struct scatter_walk in;
|
|
unsigned int nbytes;
|
|
|
|
struct scatter_walk out;
|
|
unsigned int total;
|
|
|
|
void *page;
|
|
u8 *buffer;
|
|
u8 *iv;
|
|
|
|
int flags;
|
|
unsigned int blocksize;
|
|
};
|
|
|
|
struct ablkcipher_walk {
|
|
struct {
|
|
struct page *page;
|
|
unsigned int offset;
|
|
} src, dst;
|
|
|
|
struct scatter_walk in;
|
|
unsigned int nbytes;
|
|
struct scatter_walk out;
|
|
unsigned int total;
|
|
struct list_head buffers;
|
|
u8 *iv_buffer;
|
|
u8 *iv;
|
|
int flags;
|
|
unsigned int blocksize;
|
|
};
|
|
|
|
extern const struct crypto_type crypto_ablkcipher_type;
|
|
extern const struct crypto_type crypto_aead_type;
|
|
extern const struct crypto_type crypto_blkcipher_type;
|
|
|
|
void crypto_mod_put(struct crypto_alg *alg);
|
|
|
|
int crypto_register_template(struct crypto_template *tmpl);
|
|
void crypto_unregister_template(struct crypto_template *tmpl);
|
|
struct crypto_template *crypto_lookup_template(const char *name);
|
|
|
|
int crypto_register_instance(struct crypto_template *tmpl,
|
|
struct crypto_instance *inst);
|
|
int crypto_unregister_instance(struct crypto_alg *alg);
|
|
|
|
int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
|
|
struct crypto_instance *inst, u32 mask);
|
|
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
|
|
struct crypto_instance *inst,
|
|
const struct crypto_type *frontend);
|
|
|
|
void crypto_drop_spawn(struct crypto_spawn *spawn);
|
|
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
|
|
u32 mask);
|
|
void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
|
|
|
|
static inline void crypto_set_spawn(struct crypto_spawn *spawn,
|
|
struct crypto_instance *inst)
|
|
{
|
|
spawn->inst = inst;
|
|
}
|
|
|
|
struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
|
|
int crypto_check_attr_type(struct rtattr **tb, u32 type);
|
|
const char *crypto_attr_alg_name(struct rtattr *rta);
|
|
struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
|
|
const struct crypto_type *frontend,
|
|
u32 type, u32 mask);
|
|
|
|
static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
|
|
u32 type, u32 mask)
|
|
{
|
|
return crypto_attr_alg2(rta, NULL, type, mask);
|
|
}
|
|
|
|
int crypto_attr_u32(struct rtattr *rta, u32 *num);
|
|
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
|
|
unsigned int head);
|
|
struct crypto_instance *crypto_alloc_instance(const char *name,
|
|
struct crypto_alg *alg);
|
|
|
|
void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
|
|
int crypto_enqueue_request(struct crypto_queue *queue,
|
|
struct crypto_async_request *request);
|
|
void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset);
|
|
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
|
|
int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
|
|
|
|
/* These functions require the input/output to be aligned as u32. */
|
|
void crypto_inc(u8 *a, unsigned int size);
|
|
void crypto_xor(u8 *dst, const u8 *src, unsigned int size);
|
|
|
|
int blkcipher_walk_done(struct blkcipher_desc *desc,
|
|
struct blkcipher_walk *walk, int err);
|
|
int blkcipher_walk_virt(struct blkcipher_desc *desc,
|
|
struct blkcipher_walk *walk);
|
|
int blkcipher_walk_phys(struct blkcipher_desc *desc,
|
|
struct blkcipher_walk *walk);
|
|
int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
|
|
struct blkcipher_walk *walk,
|
|
unsigned int blocksize);
|
|
|
|
int ablkcipher_walk_done(struct ablkcipher_request *req,
|
|
struct ablkcipher_walk *walk, int err);
|
|
int ablkcipher_walk_phys(struct ablkcipher_request *req,
|
|
struct ablkcipher_walk *walk);
|
|
void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
|
|
|
|
static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
|
|
{
|
|
return PTR_ALIGN(crypto_tfm_ctx(tfm),
|
|
crypto_tfm_alg_alignmask(tfm) + 1);
|
|
}
|
|
|
|
static inline struct crypto_instance *crypto_tfm_alg_instance(
|
|
struct crypto_tfm *tfm)
|
|
{
|
|
return container_of(tfm->__crt_alg, struct crypto_instance, alg);
|
|
}
|
|
|
|
static inline void *crypto_instance_ctx(struct crypto_instance *inst)
|
|
{
|
|
return inst->__ctx;
|
|
}
|
|
|
|
static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
|
|
struct crypto_ablkcipher *tfm)
|
|
{
|
|
return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
|
|
}
|
|
|
|
static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
|
|
{
|
|
return crypto_tfm_ctx(&tfm->base);
|
|
}
|
|
|
|
static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
|
|
{
|
|
return crypto_tfm_ctx_aligned(&tfm->base);
|
|
}
|
|
|
|
static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm)
|
|
{
|
|
return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
|
|
}
|
|
|
|
static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
|
|
{
|
|
return crypto_tfm_ctx(&tfm->base);
|
|
}
|
|
|
|
static inline struct crypto_instance *crypto_aead_alg_instance(
|
|
struct crypto_aead *aead)
|
|
{
|
|
return crypto_tfm_alg_instance(&aead->base);
|
|
}
|
|
|
|
static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
|
|
struct crypto_spawn *spawn)
|
|
{
|
|
u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
|
|
u32 mask = CRYPTO_ALG_TYPE_MASK;
|
|
|
|
return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
|
|
}
|
|
|
|
static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
|
|
{
|
|
return crypto_tfm_ctx(&tfm->base);
|
|
}
|
|
|
|
static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
|
|
{
|
|
return crypto_tfm_ctx_aligned(&tfm->base);
|
|
}
|
|
|
|
static inline struct crypto_cipher *crypto_spawn_cipher(
|
|
struct crypto_spawn *spawn)
|
|
{
|
|
u32 type = CRYPTO_ALG_TYPE_CIPHER;
|
|
u32 mask = CRYPTO_ALG_TYPE_MASK;
|
|
|
|
return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
|
|
}
|
|
|
|
static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
|
|
{
|
|
return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
|
|
}
|
|
|
|
static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn)
|
|
{
|
|
u32 type = CRYPTO_ALG_TYPE_HASH;
|
|
u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
|
|
|
|
return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
|
|
}
|
|
|
|
static inline void *crypto_hash_ctx(struct crypto_hash *tfm)
|
|
{
|
|
return crypto_tfm_ctx(&tfm->base);
|
|
}
|
|
|
|
static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm)
|
|
{
|
|
return crypto_tfm_ctx_aligned(&tfm->base);
|
|
}
|
|
|
|
static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
|
|
struct scatterlist *dst,
|
|
struct scatterlist *src,
|
|
unsigned int nbytes)
|
|
{
|
|
walk->in.sg = src;
|
|
walk->out.sg = dst;
|
|
walk->total = nbytes;
|
|
}
|
|
|
|
static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
|
|
struct scatterlist *dst,
|
|
struct scatterlist *src,
|
|
unsigned int nbytes)
|
|
{
|
|
walk->in.sg = src;
|
|
walk->out.sg = dst;
|
|
walk->total = nbytes;
|
|
INIT_LIST_HEAD(&walk->buffers);
|
|
}
|
|
|
|
static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
|
|
{
|
|
if (unlikely(!list_empty(&walk->buffers)))
|
|
__ablkcipher_walk_complete(walk);
|
|
}
|
|
|
|
static inline struct crypto_async_request *crypto_get_backlog(
|
|
struct crypto_queue *queue)
|
|
{
|
|
return queue->backlog == &queue->list ? NULL :
|
|
container_of(queue->backlog, struct crypto_async_request, list);
|
|
}
|
|
|
|
static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
|
|
struct ablkcipher_request *request)
|
|
{
|
|
return crypto_enqueue_request(queue, &request->base);
|
|
}
|
|
|
|
static inline struct ablkcipher_request *ablkcipher_dequeue_request(
|
|
struct crypto_queue *queue)
|
|
{
|
|
return ablkcipher_request_cast(crypto_dequeue_request(queue));
|
|
}
|
|
|
|
static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
|
|
{
|
|
return req->__ctx;
|
|
}
|
|
|
|
static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
|
|
struct crypto_ablkcipher *tfm)
|
|
{
|
|
return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
|
|
}
|
|
|
|
static inline void *aead_request_ctx(struct aead_request *req)
|
|
{
|
|
return req->__ctx;
|
|
}
|
|
|
|
static inline void aead_request_complete(struct aead_request *req, int err)
|
|
{
|
|
req->base.complete(&req->base, err);
|
|
}
|
|
|
|
static inline u32 aead_request_flags(struct aead_request *req)
|
|
{
|
|
return req->base.flags;
|
|
}
|
|
|
|
static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
|
|
u32 type, u32 mask)
|
|
{
|
|
return crypto_attr_alg(tb[1], type, mask);
|
|
}
|
|
|
|
/*
|
|
* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
|
|
* Otherwise returns zero.
|
|
*/
|
|
static inline int crypto_requires_sync(u32 type, u32 mask)
|
|
{
|
|
return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
|
|
}
|
|
|
|
#endif /* _CRYPTO_ALGAPI_H */
|
|
|