b9c55aa475
This patch makes crypto_alloc_ablkcipher/crypto_grab_skcipher always return algorithms that are capable of generating their own IVs through givencrypt and givdecrypt. Each algorithm may specify its default IV generator through the geniv field. For algorithms that do not set the geniv field, the blkcipher layer will pick a default. Currently it's chainiv for synchronous algorithms and eseqiv for asynchronous algorithms. Note that if these wrappers do not work on an algorithm then that algorithm must specify its own geniv or it can't be used at all. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
147 lines
3.8 KiB
C
147 lines
3.8 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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/* 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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#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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{
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unsigned int len = alg->cra_ctxsize;
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if (alg->cra_alignmask) {
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len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
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len += alg->cra_digest.dia_digestsize;
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}
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return len;
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}
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static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
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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_compress_ctxsize(struct crypto_alg *alg)
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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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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_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_kill(struct crypto_alg *alg);
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struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
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void crypto_larval_error(const char *name, u32 type, u32 mask);
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void crypto_shoot_alg(struct crypto_alg *alg);
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struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
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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 void crypto_alg_put(struct crypto_alg *alg)
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{
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if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
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alg->cra_destroy(alg);
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}
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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_is_dead(struct crypto_alg *alg)
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{
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return alg->cra_flags & CRYPTO_ALG_DEAD;
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}
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static inline int crypto_is_moribund(struct crypto_alg *alg)
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{
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return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
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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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