From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- include/crypto/algapi.h | 278 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 278 insertions(+) create mode 100644 include/crypto/algapi.h (limited to 'include/crypto/algapi.h') diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h new file mode 100644 index 000000000..939a3196b --- /dev/null +++ b/include/crypto/algapi.h @@ -0,0 +1,278 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Cryptographic API for algorithms (i.e., low-level API). + * + * Copyright (c) 2006 Herbert Xu + */ +#ifndef _CRYPTO_ALGAPI_H +#define _CRYPTO_ALGAPI_H + +#include +#include +#include +#include +#include +#include + +#include + +/* + * Maximum values for blocksize and alignmask, used to allocate + * static buffers that are big enough for any combination of + * algs and architectures. Ciphers have a lower maximum size. + */ +#define MAX_ALGAPI_BLOCKSIZE 160 +#define MAX_ALGAPI_ALIGNMASK 63 +#define MAX_CIPHER_BLOCKSIZE 16 +#define MAX_CIPHER_ALIGNMASK 15 + +struct crypto_aead; +struct crypto_instance; +struct module; +struct notifier_block; +struct rtattr; +struct seq_file; +struct sk_buff; + +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); + void (*free)(struct crypto_instance *inst); + + unsigned int type; + unsigned int maskclear; + unsigned int maskset; + unsigned int tfmsize; +}; + +struct crypto_instance { + struct crypto_alg alg; + + struct crypto_template *tmpl; + + union { + /* Node in list of instances after registration. */ + struct hlist_node list; + /* List of attached spawns before registration. */ + struct crypto_spawn *spawns; + }; + + struct work_struct free_work; + + void *__ctx[] CRYPTO_MINALIGN_ATTR; +}; + +struct crypto_template { + struct list_head list; + struct hlist_head instances; + struct module *module; + + 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; + union { + /* Back pointer to instance after registration.*/ + struct crypto_instance *inst; + /* Spawn list pointer prior to registration. */ + struct crypto_spawn *next; + }; + const struct crypto_type *frontend; + u32 mask; + bool dead; + bool registered; +}; + +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 crypto_attr_alg { + char name[CRYPTO_MAX_ALG_NAME]; +}; + +struct crypto_attr_type { + u32 type; + u32 mask; +}; + +void crypto_mod_put(struct crypto_alg *alg); + +int crypto_register_template(struct crypto_template *tmpl); +int crypto_register_templates(struct crypto_template *tmpls, int count); +void crypto_unregister_template(struct crypto_template *tmpl); +void crypto_unregister_templates(struct crypto_template *tmpls, int count); +struct crypto_template *crypto_lookup_template(const char *name); + +int crypto_register_instance(struct crypto_template *tmpl, + struct crypto_instance *inst); +void crypto_unregister_instance(struct crypto_instance *inst); + +int crypto_grab_spawn(struct crypto_spawn *spawn, struct crypto_instance *inst, + const char *name, u32 type, u32 mask); +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); + +struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); +int crypto_check_attr_type(struct rtattr **tb, u32 type, u32 *mask_ret); +const char *crypto_attr_alg_name(struct rtattr *rta); +int crypto_inst_setname(struct crypto_instance *inst, 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_enqueue_request_head(struct crypto_queue *queue, + struct crypto_async_request *request); +struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); +static inline unsigned int crypto_queue_len(struct crypto_queue *queue) +{ + return queue->qlen; +} + +void crypto_inc(u8 *a, unsigned int size); +void __crypto_xor(u8 *dst, const u8 *src1, const u8 *src2, unsigned int size); + +static inline void crypto_xor(u8 *dst, const u8 *src, unsigned int size) +{ + if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && + __builtin_constant_p(size) && + (size % sizeof(unsigned long)) == 0) { + unsigned long *d = (unsigned long *)dst; + unsigned long *s = (unsigned long *)src; + unsigned long l; + + while (size > 0) { + l = get_unaligned(d) ^ get_unaligned(s++); + put_unaligned(l, d++); + size -= sizeof(unsigned long); + } + } else { + __crypto_xor(dst, dst, src, size); + } +} + +static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2, + unsigned int size) +{ + if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && + __builtin_constant_p(size) && + (size % sizeof(unsigned long)) == 0) { + unsigned long *d = (unsigned long *)dst; + unsigned long *s1 = (unsigned long *)src1; + unsigned long *s2 = (unsigned long *)src2; + unsigned long l; + + while (size > 0) { + l = get_unaligned(s1++) ^ get_unaligned(s2++); + put_unaligned(l, d++); + size -= sizeof(unsigned long); + } + } else { + __crypto_xor(dst, src1, src2, size); + } +} + +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 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 u32 crypto_requires_off(struct crypto_attr_type *algt, u32 off) +{ + return (algt->type ^ off) & algt->mask & off; +} + +/* + * When an algorithm uses another algorithm (e.g., if it's an instance of a + * template), these are the flags that should always be set on the "outer" + * algorithm if any "inner" algorithm has them set. + */ +#define CRYPTO_ALG_INHERITED_FLAGS \ + (CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK | \ + CRYPTO_ALG_ALLOCATES_MEMORY) + +/* + * Given the type and mask that specify the flags restrictions on a template + * instance being created, return the mask that should be passed to + * crypto_grab_*() (along with type=0) to honor any request the user made to + * have any of the CRYPTO_ALG_INHERITED_FLAGS clear. + */ +static inline u32 crypto_algt_inherited_mask(struct crypto_attr_type *algt) +{ + return crypto_requires_off(algt, CRYPTO_ALG_INHERITED_FLAGS); +} + +noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size); + +/** + * crypto_memneq - Compare two areas of memory without leaking + * timing information. + * + * @a: One area of memory + * @b: Another area of memory + * @size: The size of the area. + * + * Returns 0 when data is equal, 1 otherwise. + */ +static inline int crypto_memneq(const void *a, const void *b, size_t size) +{ + return __crypto_memneq(a, b, size) != 0UL ? 1 : 0; +} + +int crypto_register_notifier(struct notifier_block *nb); +int crypto_unregister_notifier(struct notifier_block *nb); + +/* Crypto notification events. */ +enum { + CRYPTO_MSG_ALG_REQUEST, + CRYPTO_MSG_ALG_REGISTER, + CRYPTO_MSG_ALG_LOADED, +}; + +static inline void crypto_request_complete(struct crypto_async_request *req, + int err) +{ + crypto_completion_t complete = req->complete; + complete(req, err); +} + +#endif /* _CRYPTO_ALGAPI_H */ -- cgit v1.2.3