1 /* 2 * Cryptographic API. 3 * 4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 5 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the Free 9 * Software Foundation; either version 2 of the License, or (at your option) 10 * any later version. 11 * 12 */ 13 #ifndef _CRYPTO_INTERNAL_H 14 #define _CRYPTO_INTERNAL_H 15 #include <linux/crypto.h> 16 #include <linux/mm.h> 17 #include <linux/highmem.h> 18 #include <linux/interrupt.h> 19 #include <linux/init.h> 20 #include <linux/list.h> 21 #include <linux/kernel.h> 22 #include <linux/rwsem.h> 23 #include <linux/slab.h> 24 #include <asm/kmap_types.h> 25 26 extern struct list_head crypto_alg_list; 27 extern struct rw_semaphore crypto_alg_sem; 28 29 extern enum km_type crypto_km_types[]; 30 31 static inline enum km_type crypto_kmap_type(int out) 32 { 33 return crypto_km_types[(in_softirq() ? 2 : 0) + out]; 34 } 35 36 static inline void *crypto_kmap(struct page *page, int out) 37 { 38 return kmap_atomic(page, crypto_kmap_type(out)); 39 } 40 41 static inline void crypto_kunmap(void *vaddr, int out) 42 { 43 kunmap_atomic(vaddr, crypto_kmap_type(out)); 44 } 45 46 static inline void crypto_yield(struct crypto_tfm *tfm) 47 { 48 if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP) 49 cond_resched(); 50 } 51 52 #ifdef CONFIG_CRYPTO_HMAC 53 int crypto_alloc_hmac_block(struct crypto_tfm *tfm); 54 void crypto_free_hmac_block(struct crypto_tfm *tfm); 55 #else 56 static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm) 57 { 58 return 0; 59 } 60 61 static inline void crypto_free_hmac_block(struct crypto_tfm *tfm) 62 { } 63 #endif 64 65 #ifdef CONFIG_PROC_FS 66 void __init crypto_init_proc(void); 67 #else 68 static inline void crypto_init_proc(void) 69 { } 70 #endif 71 72 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg, 73 int flags) 74 { 75 return alg->cra_ctxsize; 76 } 77 78 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, 79 int flags) 80 { 81 unsigned int len = alg->cra_ctxsize; 82 83 switch (flags & CRYPTO_TFM_MODE_MASK) { 84 case CRYPTO_TFM_MODE_CBC: 85 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); 86 len += alg->cra_blocksize; 87 break; 88 } 89 90 return len; 91 } 92 93 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, 94 int flags) 95 { 96 return alg->cra_ctxsize; 97 } 98 99 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); 100 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); 101 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); 102 103 int crypto_init_digest_ops(struct crypto_tfm *tfm); 104 int crypto_init_cipher_ops(struct crypto_tfm *tfm); 105 int crypto_init_compress_ops(struct crypto_tfm *tfm); 106 107 void crypto_exit_digest_ops(struct crypto_tfm *tfm); 108 void crypto_exit_cipher_ops(struct crypto_tfm *tfm); 109 void crypto_exit_compress_ops(struct crypto_tfm *tfm); 110 111 #endif /* _CRYPTO_INTERNAL_H */ 112 113