forked from luck/tmp_suning_uos_patched
492e2b63eb
This patch also adds the infrastructure to pick an algorithm based on their type. For example, this allows you to select the encryption algorithm "aes", instead of any algorithm registered under the name "aes". For now this is only accessible internally. Eventually it will be made available through crypto_alloc_tfm. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
173 lines
4.3 KiB
C
173 lines
4.3 KiB
C
/*
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* Cryptographic API.
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*
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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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_INTERNAL_H
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#define _CRYPTO_INTERNAL_H
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#include <crypto/algapi.h>
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#include <linux/completion.h>
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#include <linux/mm.h>
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#include <linux/highmem.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/notifier.h>
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#include <linux/rwsem.h>
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#include <linux/slab.h>
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#include <asm/kmap_types.h>
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/* Crypto notification events. */
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enum {
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CRYPTO_MSG_ALG_REQUEST,
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CRYPTO_MSG_ALG_REGISTER,
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CRYPTO_MSG_ALG_UNREGISTER,
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CRYPTO_MSG_TMPL_REGISTER,
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CRYPTO_MSG_TMPL_UNREGISTER,
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};
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struct crypto_instance;
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struct crypto_template;
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struct crypto_larval {
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struct crypto_alg alg;
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struct crypto_alg *adult;
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struct completion completion;
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u32 mask;
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};
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extern struct list_head crypto_alg_list;
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extern struct rw_semaphore crypto_alg_sem;
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extern struct blocking_notifier_head crypto_chain;
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extern enum km_type crypto_km_types[];
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static inline enum km_type crypto_kmap_type(int out)
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{
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return crypto_km_types[(in_softirq() ? 2 : 0) + out];
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}
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static inline void *crypto_kmap(struct page *page, int out)
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{
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return kmap_atomic(page, crypto_kmap_type(out));
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}
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static inline void crypto_kunmap(void *vaddr, int out)
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{
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kunmap_atomic(vaddr, crypto_kmap_type(out));
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}
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static inline void crypto_yield(struct crypto_tfm *tfm)
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{
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if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP)
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cond_resched();
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}
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#ifdef CONFIG_CRYPTO_HMAC
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int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
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void crypto_free_hmac_block(struct crypto_tfm *tfm);
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#else
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static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
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{
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return 0;
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}
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static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
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{ }
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#endif
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#ifdef CONFIG_PROC_FS
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void __init crypto_init_proc(void);
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void __exit crypto_exit_proc(void);
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#else
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static inline void crypto_init_proc(void)
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{ }
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static inline void crypto_exit_proc(void)
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{ }
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#endif
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static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
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int flags)
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{
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return alg->cra_ctxsize;
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}
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static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
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int flags)
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{
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unsigned int len = alg->cra_ctxsize;
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switch (flags & CRYPTO_TFM_MODE_MASK) {
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case CRYPTO_TFM_MODE_CBC:
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len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
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len += alg->cra_blocksize;
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break;
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}
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return len;
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}
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static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
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int flags)
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{
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return alg->cra_ctxsize;
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}
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struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
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void crypto_mod_put(struct crypto_alg *alg);
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struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
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struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
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int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
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int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
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int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
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int crypto_init_digest_ops(struct crypto_tfm *tfm);
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int crypto_init_cipher_ops(struct crypto_tfm *tfm);
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int crypto_init_compress_ops(struct crypto_tfm *tfm);
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void crypto_exit_digest_ops(struct crypto_tfm *tfm);
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void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
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void crypto_exit_compress_ops(struct crypto_tfm *tfm);
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void crypto_larval_error(const char *name, u32 type, u32 mask);
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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_register_notifier(struct notifier_block *nb);
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int crypto_unregister_notifier(struct notifier_block *nb);
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static inline int crypto_tmpl_get(struct crypto_template *tmpl)
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{
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return try_module_get(tmpl->module);
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}
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static inline void crypto_tmpl_put(struct crypto_template *tmpl)
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{
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module_put(tmpl->module);
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}
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static inline int crypto_is_larval(struct crypto_alg *alg)
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{
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return alg->cra_flags & CRYPTO_ALG_LARVAL;
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}
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static inline int crypto_notify(unsigned long val, void *v)
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{
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return blocking_notifier_call_chain(&crypto_chain, val, v);
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}
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#endif /* _CRYPTO_INTERNAL_H */
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