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* Cryptographic API.
* Copyright (c) 2002 James Morris <>
* Copyright (c) 2005 Herbert Xu <>
* 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.
#include <linux/crypto.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/rwsem.h>
#include <linux/slab.h>
#include <asm/kmap_types.h>
extern struct list_head crypto_alg_list;
extern struct rw_semaphore crypto_alg_sem;
extern enum km_type crypto_km_types[];
static inline enum km_type crypto_kmap_type(int out)
return crypto_km_types[(in_softirq() ? 2 : 0) + out];
static inline void *crypto_kmap(struct page *page, int out)
return kmap_atomic(page, crypto_kmap_type(out));
static inline void crypto_kunmap(void *vaddr, int out)
kunmap_atomic(vaddr, crypto_kmap_type(out));
static inline void crypto_yield(struct crypto_tfm *tfm)
if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP)
int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
void crypto_free_hmac_block(struct crypto_tfm *tfm);
static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
return 0;
static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
{ }
void __init crypto_init_proc(void);
static inline void crypto_init_proc(void)
{ }
static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
int flags)
return alg->cra_ctxsize;
static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
int flags)
unsigned int len = alg->cra_ctxsize;
switch (flags & CRYPTO_TFM_MODE_MASK) {
len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
len += alg->cra_blocksize;
return len;
static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
int flags)
return alg->cra_ctxsize;
int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
int crypto_init_digest_ops(struct crypto_tfm *tfm);
int crypto_init_cipher_ops(struct crypto_tfm *tfm);
int crypto_init_compress_ops(struct crypto_tfm *tfm);
void crypto_exit_digest_ops(struct crypto_tfm *tfm);
void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
void crypto_exit_compress_ops(struct crypto_tfm *tfm);
#endif /* _CRYPTO_INTERNAL_H */
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