The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/crypto/internal.h

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    1 /*
    2  * Cryptographic API.
    3  *
    4  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
    5  *
    6  * This program is free software; you can redistribute it and/or modify it
    7  * under the terms of the GNU General Public License as published by the Free
    8  * Software Foundation; either version 2 of the License, or (at your option) 
    9  * any later version.
   10  *
   11  */
   12 #ifndef _CRYPTO_INTERNAL_H
   13 #define _CRYPTO_INTERNAL_H
   14 #include <linux/mm.h>
   15 #include <linux/highmem.h>
   16 #include <linux/init.h>
   17 #include <asm/hardirq.h>
   18 #include <asm/softirq.h>
   19 #include <asm/kmap_types.h>
   20 
   21 extern enum km_type crypto_km_types[];
   22 
   23 static inline enum km_type crypto_kmap_type(int out)
   24 {
   25         return crypto_km_types[(in_softirq() ? 2 : 0) + out];
   26 }
   27 
   28 static inline void *crypto_kmap(struct page *page, int out)
   29 {
   30         return kmap_atomic(page, crypto_kmap_type(out));
   31 }
   32 
   33 static inline void crypto_kunmap(void *vaddr, int out)
   34 {
   35         kunmap_atomic(vaddr, crypto_kmap_type(out));
   36 }
   37 
   38 static inline void crypto_yield(struct crypto_tfm *tfm)
   39 {
   40         if (!in_softirq())
   41                 cond_resched();
   42 }
   43 
   44 static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
   45 {
   46         return (void *)&tfm[1];
   47 }
   48 
   49 struct crypto_alg *crypto_alg_lookup(const char *name);
   50 
   51 #ifdef CONFIG_KMOD
   52 void crypto_alg_autoload(const char *name);
   53 struct crypto_alg *crypto_alg_mod_lookup(const char *name);
   54 #else
   55 static inline struct crypto_alg *crypto_alg_mod_lookup(const char *name)
   56 {
   57         return crypto_alg_lookup(name);
   58 }
   59 #endif
   60 
   61 #ifdef CONFIG_CRYPTO_HMAC
   62 int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
   63 void crypto_free_hmac_block(struct crypto_tfm *tfm);
   64 #else
   65 static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
   66 {
   67         return 0;
   68 }
   69 
   70 static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
   71 { }
   72 #endif
   73 
   74 #ifdef CONFIG_PROC_FS
   75 void __init crypto_init_proc(void);
   76 #else
   77 static inline void crypto_init_proc(void)
   78 { }
   79 #endif
   80 
   81 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
   82 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
   83 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
   84 
   85 int crypto_init_digest_ops(struct crypto_tfm *tfm);
   86 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
   87 int crypto_init_compress_ops(struct crypto_tfm *tfm);
   88 
   89 void crypto_exit_digest_ops(struct crypto_tfm *tfm);
   90 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
   91 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
   92 
   93 #endif  /* _CRYPTO_INTERNAL_H */
   94

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